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Lennox International Inc. Heat Pump 506586-01 User's Manual

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Contents

1. COIL TEMPERATURE SENSOR Bron ms ce 10K RESISTOR B AMBIENT AIR TEMPERATURE SENSOR nsi Figure 24 10k Resistor Location Table 12 Sensor Temperature Resistance Range Temperature Resistance values Pins Wire ensor Range F C range ohms Color Outdoor Ambient 3 and 4 Lor Black 40 40 to 140 280 000 to 3750 60 5 and 6 Coil Brown NOTE Sensor resistance decreases as sensed temperature increases see table 13 W Input Fault or Miswire In case of a W input fault or possible miswire the system will function as listed in the sequence of operation in figure 30 Shift Delay E37 The heat pump control has a field selectable function to reduce occasional sounds that may occur while the unit is cycling in and out of the defrost mode When a jumper is installed on the DELAY pins E37 the compressor will be cycled off for 30 seconds going in and out of the defrost mode Units are shipped with jumper installed on DELAY pins 30 D L FACTORY DEFAULT OR WHEN SECOND DELAY lt JUMPER IS MISSING Ky 30 0 SECOND DELAY 2 0 Figure 25 Shift Delay Settings Page 33 XP17 SERIES Heat pump control monitors mode of Defrost Calibration operation through outdoor ambient Coil sensor RT21 detects temperature below 35 F 2 C temperature RT13 outdoor coil during either initial
2. Detail P333 1 LLLA LLLA CIC AAT ANGLE MAY BE TOO EXTREME HOLD DOOR FIRMLY ALONG A THE HINGED SIDE TO MAINTAIN FULLY ENGAGED TABS a ROTATE IN THIS DIRECTION THEN DOWN TO REMOVE PANEL D SSD Figure 7 Removing and Installing Panels Page 10 506586 01 10 10 New or Replacement Line Set REFRIGERANT LINE SET This section provides information on installation or replacement of existing line set If new or replacement line set is not being installed then proceed to Brazing Connections on page 13 A IMPORTANT Lennox highly recommends changing line set when converting the existing system from HCFC 22 to HFC 410A If that is not possible and the line set is the proper size as reference in Table 2 use the procedure outlined under Flushing the System on page 13 If refrigerant lines are routed through a wall then seal and isolate the opening so vibration is not transmitted to the building Pay close attention to line set isolation during installation of any HVAC system When properly isolated from building structures walls ceilings floors the refrigerant lines will not create unnecessary vibration and subsequent sounds See figure 8 for recommended installation practices Also consider the following when placing a
3. XP17 SERIES System fault and lockout LED DS11 DS14 alarm codes takes precedence over system status LED codes cooling heating stages or defrost dehumidification Only the latest active LED fault or lockout alarm code if present will be displayed If no fault or lockout codes are active then system status LEDs are routinely displayed See notes 1 and 2 in table below for duration of fast slow flashes and pause Heat Pump Control LEDs DS11 Green Slow flash DS14 Red icomfort Touch Thermostat Display Moderate Alert Code 414 Condition Discharge line temperature fault Fast flash Critical Alert Code 415 Discharge line temperature lockout Possible Cause s Solution This code indicates high discharge temperatures If the discharge line temperature exceeds a temperature of 279 F 137 C during compressor operation the control will de energize the compressor contactor output and the defrost output if active The compressor will remain off until the discharge temperature has dropped below 225 F 107 C Fast flash Moderate Critical Alert Code 417 Discharge sensor fault The heat pump control A175 detects open or short sensor or out of temperature sensor range This fault is detected by allowing the unit to run for 90 seconds before checking sensor resistance If the sensor resistance is not within range after 90 seconds the control will raise the alarm 3 fast flashes
4. BLUI YELLOW HEAT PUMP CONTROL YELLOW 2 FAN MOTOR CONTROL SEE TABLE 16 FOR CFM PROFILE SELECTION OPTIONS Figure 35 Testing for External Power to Fan Motor Control Page 49 XP17 SERIES HEAT PUMP CONTROL A175 UNIT NOMINAL CAPACITY CODE CONFIGURATION In a communicating system if the room thermostat is indicating either a error code 313 indoor and outdoor unit capacity mismatch error code or error code 34 must program unit capacity for outdoor unit Use the procedure provided in figure 36 to set the unit nominal capacity code Set room thermostat to OFF Go to control terminal strip Remove R wire from control 24 volt AC power Y Non icomfort enabled Remove control wire from Y1 terminal icomfort enabled Remove control wires from i and i terminals Place jumper on FIELD TEST E33 pins Connect R wire to control 24 volt AC power Status LED lights DS11 and DS14 will blink and then on continuously Once both LEDs are on continuously then remove jumper immediately from jumper is not removed immediately from E33 then DS11 and DS14 LEDs will resume blinking again Jumper removed successfully Remove R wire from control 24 volt AC power DS14 Red O 0511 Green Field Test E33 DS12 O Communicating Status Indicator OUT Y1 OUT sb sb HI PS Sensor LO PS c
5. EMERGENCY HEAT setting to obtain temporary heat without the risk of serious damage to the heat pump In EMERGENCY HEAT mode all heating demand is satisfied by auxiliary heat heat pump operation is locked out After a six hour compressor crankcase warm up period the thermostat can be switched to the HEAT setting and normal heat pump operation may resume Preservice Check If your system fails to operate check the following before calling for service e Verify room thermostat settings are correct e Verify that all electrical disconnect switches are ON e Check for any blown fuses or tripped circuit breakers e Verify unit access panels are in place e Verify air filter is clean e f service is needed locate and write down the unit model number and have it handy before calling Accessories For update to date information see any of the following publications e Lennox XP17 Engineering Handbook e Lennox Product Catalog e Lennox Price Book Page 52 506586 01 10 10 SunSource Home Energy System This Dave Lennox Signature Collection heat pump is factory equipped with components that make it SunSource solar ready These units can be matched with solar modules and other optional equipment so that they can become part of a SunSource Home Energy System Units can be upgraded for use with solar equipment at the time of installation or in the future Solar energy is first used to meet cooling heating demands
6. S4 and low S87 pressure switches e Ambient RT13 and coil temperatures RT21 temperature monitoring and protection COMPRESSOR ANTI SHORT CYCLE DELAY The heat pump control protects the compressor from e Short cycling five minutes when there is initial power up e Interruption in power to the unit e Pressure or sensor trips e Delay after Y1 demand is removed In non communicating systems the delay is set for 300 seconds five minutes and can not be changed To override timer when active or inactive place a jumper on the field test pins between 1 and 2 seconds In communicating system the icomfort Touch thermostat has a separate built in 5 minute non adjustable short cycle protection Resetting Anti Short Cycle Delay The FIELD TEST pins E33 on the heat pump control can be jumpered between 1 to 2 seconds to bypass delay HIGH 4 AND LOW S87 PRESSURE SWITCHES The unit s pressure switches LO PS S87 and HI PS S4 are factory wired into the heat pump control on the LO PS and HI PS terminals respectively Low Pressure Switch LO PS See figure 28 for low pressure switch sequence of operation High Pressure Switch HI PS See figure 29 for high pressure switch sequence of operation Pressure Switch Event Settings The following pressures are the auto reset event value triggers for low and high pressure thresholds High Pressure auto reset trip at 590 psig reset at 418
7. ON LINES SMALLER THAN EQUALIZER LINE INSTALLATION VALOR LINE 7 8 MOUNT SENSING BULB AT EITHER THE 3 OR A Remove and discard either the flare seal cap or flare nut m Need 9 O CLOCK POSITION with copper flare seal bonnet from the equalizer line port V on the vapor line as illustrated the figure to the right BULB Remove and discard either the flare seal cap or flare nut with copper flare seal bonnet from the equalizer line port on the vapor line as illustrated in the figure to the right FLARE SEAL CAP FLARE NUT ON 7 8 AND LARGER LINES 1 MOUNT SENSING BULB AT OR COPPER FLARE EITHER THE 4 OR 8 O CLOCK SEAL BONNET POSITION NEVER MOUNT M 2 BOTTOM OF LINE MALE BRASS EQUALIZER LINE FITTING VAPOR LINE NOTE NEVER MOUNT ON BOTTOM OF LINE Figure 12 Installing Indoor Expansion Valve Page 17 XP17 SERIES Leak Test Line Set and Indoor Coil A IMPORTANT The Environmental Protection Agency EPA prohibits the intentional venting of HFC refrigerants during maintenance service repair and disposal of appliance Approved methods of recovery recycling or reclaiming must be followed A IMPORTANT Leak detector must be capable of sensing HFC refrigerant WARNING When using a high pressure gas such as dry nitrogen to pressurize a refrigeration or air conditioning system use a regulator that can control the pressure down to 1 or 2 psig 6 9 to 13 8 kPa WARNING Refrigerant
8. When the outdoor unit is not operating the system powers lighting appliances and other electronic devices in the home Any surplus power is sent back to the utility company for a possible credit check with your local utility company for availability The SolarSync package consists of the following components Lennox Solar Subpanel installed in a Dave Lennox Signature Collection air conditioner or heat pump unit e Solar modules 1 to 15 may be used to vary the amount of electricity generated e Envoy Communications Gateway monitors solar power performance All components must be ordered separately See the Lennox XP17 Engineering Handbook for SunSource Home Energy System component ordering Wiring runs from the roof mounted solar modules to the outdoor unit From there power travels to the home electrical service panel using the existing outdoor unit power wiring Page 53 XP17 SERIES XP17 Start Up and Performance Checklist Customer Address Indoor Unit Model Serial Outdoor Unit Model Serial Solar Module Mfg and Model Serial Notes START UP CHECKS Refrigerant Type Rated Load Amps Actual Amps Rated Volts Actual Volts Condenser Fan Full Load Amps Actual Amps COOLING MODE VaporPressure ___ Liquid Pressure Supply Air Temperature Ambient Temperature Return Air Temperature HEATING MODE VaporPressure ___ Liquid Pressure Supply Air Temp
9. then pause Moderate Critical Alert Code 418 W output hardware fault When auxiliary heat output is detected as active Fault in the heat pump control Replace heat pump control See figure 30 for further details 3 fast flashes then pause On Moderate Critical Alert Code 419 W output hardware fault lockout If heat pump control recognizes five output hardware fault events during a single cooling demand the heat pump control will initiate a lockout See figure 30 for fur ther details Off 3 fast flashes then pause Critical Alert Code 421 W external miswire fault When auxiliary heat output is detected as active after compressor has been de en ergized See figure 30 for further details Simultaneous fast flashes then pause Second stage heat lock in If the unit is in non communicating mode and it goes to second stage due to ambi ent temperature being below second stage lock in setting E48 Fast simultaneous flashing of DS11 DS13 DS14 and DS15 Factory test mode 1 Pause duration is two 2 seconds 2 Fast flash duration is 1 2 second Slow flash duration is one 1 second 506586 01 10 10 Page 42 Table 15 Compressor Fault and Lockout LED Codes and Related icomfort Touch Thermostat Alert Codes NOTE See notes 1 and 2 in table below for duration of fast slow flashes and pause Heat Pump Control LEDs DS15 Yellow DS13 Red icomf
10. 126 Internal control communication failure Internal communication on heat pump control Alert will clear 300 seconds after fault has recovered Critical Alert Code 131 Corrupted control parameters System stored configuration data is corrupted System will not run Slow flash Critical Alert Code 132 Moderate Alert Code 410 Failed flash CRC check Low pressure fault Critical Alert Code 411 Low pressure switch lockout Slow flash Moderate Alert Code 412 High pressure fault Critical Alert Code 413 High pressure switch lockout No operations heat pump control enters boot loader mode Alarm will clears after reset Refer to communicating thermostat for memory corrupt handling 1 Remove any blockages or restrictions from coils and or fans Check indoor and outdoor fan motor for proper current draws 2 Check system charge using approach and sub cooling temperatures 3 Check system operating pressures and compare to unit charging charts 4 Make sure all pressure switches and sensors have secure connections to system to prevent refriger ant leaks or errors in pressure and temperature measurements 1 Restricted air flow over in door or outdoor coil 2 Improper refrigerant charge in system 3 Improper metering device installed or incorrect op eration of metering device 4 Incorrect or improper sen sor location or connection to system Page 41
11. Code Configuration 506586 01 10 10 Page 50 A WARNING This product and or the indoor unit it is matched with may contain fiberglass wool Disturbing the insulation during installation maintenance or repair will expose you to fiberglass wool dust Breathing this may cause lung cancer Fiberglass wool is known to the State of California to cause cancer Fiberglass wool may also cause respiratory skin and eye irritation To reduce exposure to this substance or for further information consult material safety data sheets available from address shown below or contact your supervisor Lennox Industries Inc P O Box 799900 Dallas TX 75379 9900 DEALER Outdoor Unit Maintenance and service must be performed by a qualified installer or service agency At the beginning of each cooling season the system should be checked as follows 1 Clean and inspect outdoor coil may be flushed with a water hose Ensure power is off before cleaning 2 Outdoor unit fan motor is pre lubricated and sealed No further lubrication is needed 3 Visually inspect all connecting lines joints and coils for evidence of oil leaks 4 Check all wiring for loose connections Outdoor Coil The outdoor coil may be flushed with a water hose Outdoor Coil sea coast Moist air in ocean locations can carry salt which is corrosive to most metal Units that are located near the ocean require frequent inspections and maintenance Thes
12. Elevated Slab Mounting using Feet Extenders 2 50 8MM SCH 40 FEMALE THREADED ADAPTER 2 50 8MM SCH 40 MALE THREADED ADAPTER Use additional 2 SCH 40 male threaded adapters which can be threaded into the female threaded adapters to make additional adjustments to the level of the unit BUILDING STRUCTURE MOUNTING T MINI GROUND LEVEL STABILIZING UNIT ON UNEVEN SURFACES DETAIL D Slab Side Mounting 10 1 2 LONG SELF DRILLING SHEET METAL SCREWS A STABILIZING BRACKET 18 GAUGE METAL 2 WIDTH HEIGHT 5 X REQUIRED 10 1 1 4 LONG HEX HD SCREW AND FLAT WASHER NG Concrete slab use two plastic anchors hole drill 1 4 Wood or plastic slab no plastic anchor hole drill 1 8 DETAIL E Deck Top Mounting MINIMUM ONE Stabilizing bracket 18 gauge metal 2 50 8mm width height as required bend to form right angle as exampled below PER SIDE 4 FOR EXTRA STABILITY SAME FASTENERS AS SLAB SIDE MOUNTING One bracket per side minimum For extra stability two brackets per side two inches 51mm from each corner IMPORTANT To help stabilize an outdoor unit some installations may require strapping the unit to the pad using brackets and anchors commonly available in the marketplace Figure 5 Placement Slab Mounting and Stabilizing Unit 506586 01 10 10 Page 8 STABILIZING UNIT ON
13. IGNORED FOR ENERGIZED 90 SECONDS LOW PRESSURE SWITCH IS CLOSED OR OUTDOOR SWITCH S87 AMBIENT TEMPERATURE IS 15 F OR BELOW COMPRESSOR CONTACTOR 1 f 5 strike counter has four or less strikes when Y1 demand is DE ENERGIZED terminatedor satisfied the strike counter will reset to zero In a icomfort Touch thermostat enabled setup the thermostat will terminate demand when the compressor contactor is de energized If demand is satisfied when alarm is not active the 5 strike counter will reset COMPRESSOR 2 Lockouts can be reset by either cycling power off to the heat pump con ANTI SHORT trol s A175 R terminal or placing a jumper on the field test pins E33 CYCLE TIMER between 1 to 2 seconds BEGINS 5 STRIKE COUNTER REACHES 5 WITHIN A SINGLE Y1 DEMAND INCREMENT 5 STRIKE COUNTER LED ALERT CODE OR MODERATE ALERT 410 DISPLAYED LOW PRESSURE SWITCH S87 LOCKOUT LED ALERT ANTI SHORT CODE OR CYCLE TIMER CRITICAL SERVICE 2 ENDS ALERT 411 REQUIRED DISPLAYED COMPRESSOR CONTACTOR ENERGIZED LOW LED ALERT PRESSURE CODE OR NORMAL MODERATE SWITCH S87 CLOSED ALERT 410 OPERATION SERVICE DISPLAYED REQUIRED WAITING FOR PRESSURE SWITCH TO CLOSED CLOSE Figure 28 Low Pressure S87 Switch Operation Page 36 506586 01 10 10 HIGH PRESSURE COMPRESSOR SWITCH 4 ore CONTACTOR ENERGIZED HIGH PRESSURE SWITCH S4 COMPRESSOR CONTACTOR 1 f 5 strike
14. Resistance 136 3 2680 56 8 16657 21 6 44154 11 3 123152 133 1 2859 56 0 16973 21 0 44851 11 9 125787 130 1 3040 55 3 17293 20 5 45560 12 6 128508 127 3 3223 54 6 17616 20 0 46281 13 2 131320 124 7 3407 53 9 17942 19 4 47014 13 9 134227 122 1 3592 53 2 18273 18 9 47759 14 5 137234 119 7 3779 52 5 18607 18 4 48517 15 2 140347 117 5 3968 51 9 18945 17 8 49289 15 9 143571 115 3 4159 51 2 19287 17 3 50074 16 5 146913 113 2 4351 50 5 19633 16 8 50873 17 2 150378 111 2 4544 49 9 19982 16 3 51686 17 9 153974 109 3 4740 49 2 20336 15 7 52514 18 6 157708 107 4 4937 48 5 20695 15 2 53356 19 3 161588 105 6 5136 47 9 21057 14 7 54215 20 1 165624 103 9 5336 47 3 21424 14 1 55089 20 8 169824 102 3 5539 46 6 21795 13 6 55979 21 5 174200 100 6 5743 46 0 22171 13 1 56887 22 3 178762 99 1 5949 45 4 22551 12 5 57811 23 0 183522 97 6 6157 44 7 22936 12 0 58754 23 8 188493 96 1 6367 44 1 23326 11 5 59715 24 6 193691 94 7 6578 43 5 23720 11 0 60694 25 4 199130 93 3 6792 42 9 24120 10 4 61693 26 2 204829 92 0 7007 42 3 24525 9 9 62712 27 0 210805 90 6 7225 41 7 24934 9 3 63752 27 8 217080 89 4 7444 41 1 25349 8 8 64812 28 7 223677 88 1 7666 40 5 25769 8 3 65895 29 5 230621 86 9 7890 39 9 26195 7 7 67000 30 4 237941 85 7 8115 39 3 26626 7 2 68128 31 3 245667 84 5 8343 38 7 27063 6 7 69281 32 2 253834 83 4 8573 38 1 27505 6 1 70458 33 2 262482 82 3 8806 37 5 27954 5 6 71661 34 1 271655 81 2 9040 37 0 28408 5 0 72890 35 1 281400 80 1 927
15. UNEVEN SURFACES A IMPORTANT Unit Stabilizer Bracket Use field provided Always use stabilizers when unit is raised above the factory height Elevated units could become unstable in gusty wind conditions Stabilizers may be used on factory height units when mounted on unstable an uneven surface 1 Remove two side louvered panels to expose the unit base 2 Install the brackets as illustrated in figure 5 detail D using conventional practices 3 Replace the panels after installation is complete ROOF MOUNTING Install the unit a minimum of six inches 152 mm above the roof surface to avoid ice build up around the unit Locate the unit above a load bearing wall or area of the roof that can adequately support the unit Consult local codes for rooftop applications If unit coil cannot be mounted away from prevailing winter winds a wind barrier should be constructed Size barrier at least the same height and width as outdoor unit Mount barrier 24 inches 610 mm from the sides of the unit in the direction of prevailing winds PREVAILING WINTER WINDS WIND BARRIER INLET AIR 24 610 NN ALT PY AA SA AN BR EAA INLET AIR Figure 6 Rooftop Application and Wind Barrier Inches millimeters NOTICE Roof Damage This system contains both refrigerant and oil Some rubber roofing material may absorbed oil and cause the rubber to swell when it comes into contact with
16. can be harmful if it is inhaled Refrigerant must be used and recovered responsibly Failure to follow this warning may result in personal injury or death A IMPORTANT If this unit is being matched with an approved line set or indoor unit coil which was previously charged with mineral oil or if it is being matched with a coil which was manufactured before January of 1999 the coil and line set must be flushed prior to installation Take care to empty all existing traps Polyol ester POE oils are used in Lennox units charged with HFC 410A refrigerant Residual mineral oil can act as an insulator preventing proper heat transfer It can also clog the expansion device and reduce the system performance and capacity Failure to properly flush the system per the instructions below will void the warranty 1 CONNECT GAUGE SET A Connect an HFC 410A manifold gauge set high pressure hose to the vapor valve service port NOTE Normally the high pressure hose is connected to MANIFOLD GAUGE SET the liquid line port However connecting it to the vapor port better protects the manifold gauge set from high pressure O damage B With both manifold valves closed connect the cylinder of t OUTDOOR UNIT HFC 410A refrigerant to the center port of the manifold gauge set LOW HIGH NOTE Later in the procedure the HFC 410A container will be replaced by the nitrogen A container T
17. contact e Check if TXV fixed orifice is stuck closed or de fective 5 Condenser coil is dirty 6 Liquid line restriction filter drier blocked if present 7 Thermostat is malfunctioning e Check thermostat sub base or wiring for short circuit Check thermostat installation location and lev el Clears the error after 30 consec utive normal run cycles or after power reset 2 flashes then pause Critical Alert Code 402 System pressure trip Indicates the compressor protector is open or missing supply power to the compressor 1 High head pressure e Check high pressure switch if present in sys tem e if system is overcharged with refrigerant e Check for non condensable in system 2 Condenser coil poor air circulation dirty blocked damaged 3 Condenser fan is not running e Check fan capacitor e Check fan wiring and connectors e Check fan motor for failure or blockage 4 Return air duct has substantial leakage Clears after four consecutive normal com pressor run cycles or after power reset 3 flashes then pause Moderate Alert Code 403 Short cycling Compressor is running less than three minutes 1 Thermostat demand signal is intermittent 2 Time delay relay or heat pump control is defective f high pressure switch is present see flash code 2 information Page 43 Clears after four consecutive normal com pressor run cy
18. e g 036 e Line set diameters for the unit being installed as listed in table 2 and total length of installation e Number of elbows vertical rise or drop in the piping The compressor is charged with sufficient Polyol ester oil for line set lengths up to 50 feet Recommend adding oil to system based on the amount of refrigerant charge in the system No need to add oil in system with 20 pounds of refrigerant or less For systems over 20 pounds add one ounce of every five pounds of refrigerant Recommended topping off POE oils are Mobil EAL ARCTIC 22 CC or ICI EMKARATE RL32CF 4 WARNING Polyol Ester POE oils used with HFC 410A refrigerant absorb moisture very quickly It is very important that the refrigerant system be kept closed as much as possible DO NOT remove line set caps or service valve stub caps until you are ready to make connections A IMPORTANT Mineral oils are not compatible with HFC 410A If oil must be added it must be a Polyol ester oil Page 11 XP17 SERIES Line Set Isolation The following illustrations are examples of proper refrigerant line set isolation REFRIGERANT LINE SET TRANSITION FROM VERTICAL TO HORIZONTAL ANCHORED HEAVY NYLON WIRE TIE OR AUTOMOTIVE AUTOMOTIVE MUFFLER TYPE HANGER MUFFLER TYPE HANGER STRAP LIQUID LINE TO VAPOR LINE NON CORROSIVE METAL SLEEVE VAPOR LINE WRAPPED IN ARMAFLEX REFRIGERANT LINE SET INSTALLING HORIZONTAL RUNS To hang line
19. ere FI Attach the stubbed end of the check expansion valve to the liquid line orifice housing Finger tighten and use an appropriately sized wrench to turn an additional 1 2 turn clockwise as illustrated in the figure above or 20 ft lb TEFLON 7 D Place the remaining Teflon washer around the other RING SEE end of the check expansion valve Lightly lubricate I j connector threads and expose surface of the Teflon El ring with refrigerant oil EQUALIZER Attach the liquid line assembly to the check expansion LINE valve Finger tighten and use an appropriately sized wrench to turn an additional 1 2 turn clockwise as illustrated in the figure above or 20 ft lb LIQUID LINE ASSEMBLY WITH BRASS NUT SENSING BULB INSTALLATION Attach the vapor line sensing bulb in the proper orientation as illustrated to the right using the clamp and MALE EQUALIZER LINE screws provided 1 8 Turn FITTING SEE EQUALIZER LINE NOTE Confirm proper thermal contact between vapor line INSTALLATION FOR and check expansion bulb before insulating the sensing bulb FURTHER DETAILS LIQUID LINE once j T B Connect the equalizer line from the check expansion Sensing bulb insulation is required if valve to the equalizer vapor port on the vapor line Finger mounted external to the coil casing sensing tighten the flare nut plus 1 8 turn 7 ft lbs as illustrated bulb installation for bulb positioning below
20. outdoor coil before the heat pump control initiates defrost cycles DEFROST OPERATING MODES The heat pump control board has three operational modes which are e Defrost calibration and operation see figure 26 e Defrost test see figure 27 DEFROST TERMINATION TEMPERATURES E47 The heat pump control selections are 50 70 90 and 100 F 10 21 32 and 38 C The jumper termination pin is factory set at 50 F 10 C If the temperature jumper is not installed the default termination temperature is 90 F 32 C See figure 26 for on how this settings affects defrost calibration and defrost modes NOTE Colder climates could require a high discharge termination temperature setting to maintain a clear coil IF JUMPER IS 100 hi 90 LE NOT INSTALLED DEGREE hal DEGREE 90 F TARGET sea TARGET 7828 8228 70 50 DEGREE DEGREE N TARGET 2 FACTORY DEFAULT pil ball TARGET D ym 50 F Figure 23 Defrost Termination Temperature Settings Page 32 506586 01 10 10 UNIT SENSORS Sensors connect to the heat pump control through a field replaceable harness assembly that plugs into the control Through the sensors the heat pump control detects outdoor ambient and coil temperature fault conditions As the detected temperature changes the resistance across the sensor changes table 13 shows how the resistance varies as the temperature changes for both type of sensors Sensor resistance values can
21. plumbing panels B Remove any shipping clamps holding the liquid line and distributor assembly Disconnect the equalizer line from the check expansion valve equalizer line fitting on the vapor line Remove the vapor line sensing bulb Disconnect the liquid line from the check expansion valve at the liquid line assembly Disconnect the check expansion valve from the liquid line orifice housing Take care not to twist or damage distributor tubes during this process Remove and discard check expansion valve and the two Teflon rings Use a field provided fitting to temporary reconnect the liquid line to the indoor unit s liquid line orifice housing C FLUSHING LINE SET The line set and indoor unit coil must be flushed with at least the same amount of clean refrigerant that previously charged the System Check the charge in the flushing cylinder before proceeding A Set the recovery machine for liquid recovery and start the recovery machine Open the gauge set valves to allow the recovery machine to pull a vacuum on the existing system line set and indoor unit coil Invert the cylinder of clean HCFC 22 and open its valve to allow liquid refrigerant to flow into the system through the vapor line valve Allow the refrigerant to pass from the cylinder and through the line set and the indoor unit coil before it enters the recovery machine After all of the liquid refrigerant has been recovered switch the recovery machine to vapor re
22. the dehumidification modes ALERT STATUS Moderate Alert Code 105 Device communication failure icomfort Touch thermostat is unable to communicate with any other device on the RSBus Alarm only occurs if a specific device did communicate initially after power up and communication was later lost Possible causes are lost connection bus short or open or other device stop responding Moderate Alert Code 120 Unresponsive device Message could be sent by any device on RSBus if expected response message is not received from other device If sent by indoor or heat pump control device did not get expected response incorrect or no response at all from active Subnet controller If sent by the icomfort Touch thermostat and did not get the expected response incorrect or no response at all from device Normally this indicate device malfunction Critical Alert Code 124 Active subnet controller missing Device lost connection to icomfort Touch thermostat Thermostat is sending heartbeat message in one minute intervals Device sets this alarm if no Heartbeat is received for three minutes Normally this indicate lost connection to thermostat or thermostat is not working Alert will clear after valid subnet controller message is received Critical Alert Code 125 Hardware Failure Entire or partial system failure Alert will clear 300 seconds after fault has recovered Moderate Critical Alert Code
23. with current local codes and the current Canadian Electrical Code CEC Refer to the furnace or air handler installation instructions for additional wiring application diagrams and refer to unit nameplate for minimum circuit ampacity and maximum overcurrent protection size 24VAC TRANSFORMER Use the transformer provided with the furnace or air handler for low voltage control power 24VAC 40 VA minimum INSTALL THERMOSTAT Install room thermostat ordered separately on an inside wall approximately in the center of the conditioned area and 5 feet 1 5m from the floor It should not be installed on an outside wall or where it can be affected by sunlight or drafts THERMOSTAT NOTE 24VAC Class II circuit connections are made in the control box Electric Shock Hazard Can cause injury or death Unit must be grounded in accordance with national and local codes Line voltage is present at all components when unit is not in operation on units with single pole contactors Disconnect all remote electric power supplies before opening access panel Unit may have multiple power supplies CAUTION Electrostatic discharge can affect electronic components Take precautions ELECTROSTATIC DISCHARGE 3 8 Precautions and Procedures during unit installation and service to protect the unit s electronic controls Precautions will help to avoid control exposure to electrostatic discharge by putting the unit the control and the te
24. 0UHV 024 030 036 16 5 1 9 CH33 44 48B 48C 49C 14 4 0 0 CH23 51 16 3 1 6 CH33 50 60C 14 4 010 CH33 31 16 3 or Ti CR33 48 36 4 0 0 CH33 42 16 3 or Ti CR33 50 60 11 6 0 8 CR33 48 28 3 0 0 CX34 38 19 6 0 6 CX34 31 16 3 1 6 CX34 43 14 4 0 0 CX34 38 16 5 1 9 CX34 44 48B 19 6 0 6 CX34 49 8 7 1 0 Table 5 XP17 030 CX34 50 60C 14 4 0 0 able 5 Faget oer Table 8 XP17 048 Subcooling charge Target Add INDOOR MATCHUPS i Heat Cool Subcooling charge 5 F 1 F Ib oz INDOOR MATCHUPS Heat Cool s g lt 0 CBX27UH 030 036 15 5 1 3 5 F etr bis ee 9 71 7 CBX27UH 048 23 3 0 2 03 16 CBX27UH 060 15 8 28 CBX32MV 024 030 19 5 17 CBX32M 048 23 3 012 CBX32MV 036 15 5 113 CBX32M 060 20 5 1 0 CBX40UHV 024 030 036 15 5 113 CBX32MV 048 23 3 0 2 CH2351 18 71 7 CBX32MV 060 20 5 1 0 s CBX32MV 068 15 5 117 eee 18 07 CBX40UHV 048 23 3 0 2 Cid 30 i CBX40UHV 060 20 5 TT 0 CX34 31 19 5 117 CH23 68 15 8 2 8 15 113 CH33 49C 20 5 1 0 i y CH33 50 60C 20 5 1 0 CX34 44 48B 15 5 713 CH33 60D 25 4 0 0 8 CH33 62D 15 5 1 7 RET CR33 50 60 60D 21 4 0 0 CX34 49 15 6 1 0 CX34 60D 25 4 0 0 Table 6 XP17 036 CX34 62C 62D 11 4 1 5 Target Add Table 9 XP17 060 INDOOR MATCHUPS Subpooling charge Target Add Heat Ib Subcooling charge 59F 1 oz INDOOR MATCHUPS Base en CBX27UH 036 19 7 1 1 45 F 19 Ib oz CBX27UH 042 12 5 2
25. 10 CLEARANCE ON ALL SIDES INCHES MILLIMETERS ACCESS PANEL pur T N N OT E NN 12 305 CLEARANCE TO ONE OF THE OTHER THREE SIDES MUST BE 36 INCHES 914MM CLEARANCE TO ONE OF THE REMAINING TWO SIDES MAY BE 12 MINIMUM CLEARANCE ABOVE UNIT 48 1219 INCHES 305MM AND THE FINAL SIDE MAY BE 6 INCHES 152MM LINE SET 36 914 CONNECTIONS MINIMUM CLEARANCE BETWEEN TWO UNITS lt 24 610 ACCESS PANEL LINE SET CONNECTIONS REAR VIEW OF UNIT Figure 4 Installation Clearances A CAUTION In order to avoid injury take proper precaution when lift ing heavy objects See Unit Dimensions on page 3 for sizing mounting slab platforms or supports Refer to figure 4 for mandatory installation clearance requirements POSITIONING CONSIDERATIONS Consider the following when positioning the unit e Some localities are adopting sound ordinances based on the unit s sound level registered from the adjacent property not from the installation property Install the unit as far as possible from the property line e When possible do not install the unit directly outside a window Glass has a very high level of sound transmission For proper placement of unit in relation to a window see the provided illustration in figure 5 detail A PLACING UNIT ON SLAB When installing unit at grade level
26. 2 Isolation grommets for liquid and suction lines Using Manifold Gauge Set When checking the system charge only use a manifold gauge set that features low loss anti blow back fittings A IMPORTANT To prevent stripping of the various caps used the appropriately sized wrench should be used and fitted snugly over the cap before tightening Manifold gauge set used with HFC 410A refrigerant systems must be capable of handling higher system operating pressures The gauges should be rated for use with pressures of 0 800 psig on the high side and a low side of 30 vacuum to 250 psig with dampened speed to 500 psi Gauge hoses must be rated for use at or up to 800 psig of pressure with a 4000 psig burst rating Table 1 Torque Requirements Parts Recommended Torque Service valve cap 8 ft Ib 11 NM Sheet metal screws 16 in Ib 2NM Machine screws 10 28 in Ib 3 NM Compressor bolts 90 in Ib 10 NM Gauge port seal cap 8ft Ib 11 NM Operating Service Valves The liquid and vapor line service valves are used for removing refrigerant flushing leak testing evacuating verifying charge and charging Each valve is equipped with a service port which has a factory installed valve stem Figure 2 provides information on how to access and operating both angle and ball service valves A IMPORTANT Only use Allen wrenches of sufficient hardness 50Rc Rockwell Harness Scale minimum
27. 3 246 5 98 308 2 114 385 4 129 469 5 145 572 8 37 111 4 53 150 1 68 194 1 84 250 3 99 312 7 115 390 7 130 475 6 146 579 8 38 113 6 54 152 8 69 197 3 85 254 1 100 317 2 116 396 0 131 481 6 147 586 8 39 115 8 55 155 5 70 200 6 86 258 0 101 321 8 117 401 3 132 487 8 148 593 8 40 118 0 56 158 2 71 203 9 87 262 0 102 326 4 118 406 7 133 494 0 149 601 0 41 120 3 57 161 0 72 207 2 88 266 0 103 331 0 119 412 2 134 500 2 150 608 1 42 122 6 58 163 9 73 210 6 89 270 0 104 335 7 120 417 7 135 506 5 151 615 4 43 125 0 59 166 7 74 214 0 90 274 1 105 340 5 121 423 2 136 512 9 152 622 7 44 127 3 60 169 6 75 217 4 91 278 2 106 345 3 122 428 8 137 519 3 153 630 1 45 129 7 61 172 6 76 220 9 92 282 3 107 350 1 123 434 5 138 525 8 154 637 5 46 132 2 62 175 4 77 224 4 93 286 5 108 355 0 124 440 2 139 532 4 155 645 0 47 134 6 78 228 0 109 360 0 140 539 0 Page 31 XP17 SERIES System Operations A IMPORTANT Some scroll compressor have internal vacuum protector that will unload scrolls when suction pressure goes below 20 psig A hissing sound will be heard when the compressor is running unloaded Protector will reset when low pressure in system is raised above 40 psig DO NOT REPLACE COMPRESSOR The heat pump control A175 provides the following functions e Demand defrost algorithm e Field selectable defrost termination temperatures e Internal switching of outputs Compressor anti short cycle delay e Five strikes lockout safety function e
28. 4 CBX27UH 048 14 3 010 CBX32M 036 042 19 7 1 1 CBX27UH 060 15 8 1 8 CBX32M 048 12 5 24 CBX32M 048 14 3 0 0 CBX32MV 036 19 7 1 1 CBX32M 060 16 3 0112 CBX32MV 048 12 5 24 CBX32MV 048 14 3 0 0 CBX40UHV 036 19 7 1 1 CBX32MV 060 16 3 0 12 CBX40UHV 042 048 12 5 24 CBX32MV 068 73 5 0115 CH23 51 19 7 0 10 CBX40UHV 048 14 3 0 0 CH33 42 43 18 6 1 4 CBX40UHV 060 16 3 0112 CH33 44 48B 18 6 1 4 CH23 68 18 8 1 8 CH33 48C 18 6 1 4 CH33 49C 16 3 0 12 CR33 48 32 4 0 0 CH33 50 60C 16 3 0112 CX34 38 19 7 1 1 CH33 62D 73 5 0 15 CX34 43 18 6 1 4 CR33 50 60 60D 21 4 0 0 CX34 44 48B 19 7 1 1 CX34 49 16 3 0112 CX34 49 9 9 28 CX34 60D 13 5 0 15 CX34 50 60C 18 6 1 4 CX34 62C 62D 13 5 0 15 30 506586 01 10 10 Operating and Temperature Pressures Minor variations in these pressures may be expected due to differences in installations Significant differences could mean that the system is not properly charged or that a problem exists with some component in the system The normal operating pressures listed here are also located on the unit charging sticker located on the unit access panel Table 10 Normal Operating Pressure Liquid 10 and Vapor 5 PSIG Use this table to perform maintenance checks it is not a procedure for charging the A IM PORT ANT system Minor variations in these pressures may be due to differences in installations Significant deviations could mean that the system is
29. 7 36 4 28868 4 5 74147 36 1 291774 79 0 9516 35 8 29335 3 9 75431 37 1 302840 78 0 9757 35 2 29808 3 4 76745 38 2 314669 77 0 10001 34 7 30288 2 8 78090 39 2 327343 76 0 10247 34 1 30774 2 3 79465 75 0 10496 33 5 31267 1 7 80873 74 1 10747 33 0 31766 1 2 82314 73 1 11000 32 4 32273 0 6 83790 72 2 11256 31 9 32787 0 0 85302 71 3 11515 31 3 33309 0 5 86852 70 4 11776 30 7 33837 1 1 88440 69 5 12040 30 2 34374 1 7 90068 68 6 12306 29 6 34918 2 2 91738 67 7 12575 29 1 35471 2 8 93452 66 9 12847 28 6 36031 3 4 95211 66 0 13122 28 0 36600 4 0 97016 65 2 13400 27 5 37177 4 6 98870 64 4 13681 26 9 37764 5 2 100775 63 6 13964 26 4 38359 5 7 102733 62 8 14251 25 8 38963 6 3 104746 62 0 14540 25 3 39577 6 9 106817 61 2 14833 24 8 40200 7 5 108948 60 5 15129 24 2 40833 8 2 111141 59 7 15428 23 7 41476 8 8 113400 59 0 15730 23 2 42130 9 4 115727 58 2 16036 22 6 42794 10 0 118126 57 5 16345 22 1 43468 10 6 120600 Page 39 XP17 SERIES System Status Fault and Lockout LED Codes LED codes are displayed using various LEDs located on the heat pump control A175 See figure 16 for locations of heat pump control LEDs DS11 AND 0 14 SYSTEM STATUS FAULT AND LOCKOUT LED CODES DS11 Green and DS14 Red LEDs indicate non communicating mode diagnostics conditions that are listed in table 14 These LEDs display the most common fault conditions in the system When an abnormal condition is detected this function communic
30. 9 5 MM 3 OUNCE PER 5 85 G PER 1 5 M If line length is greater than 15 ft 4 6 m add this amount If line length is less than 15 ft 4 6 m subtract this amount NOTE Insulate liquid line when it is routed through areas where the surrounding ambient temperature could become higher than the temperature of the liquid line or when pressure drop is equal to or greater than 20 psig NOTE The above nameplate is for illustration purposes only Go to actual nameplate on outdoor unit for charge information Figure 21 Using HFC 410A Weigh In Method SUBC 00 IN G METHOD Check the airflow as illustrated in figure 20 to be sure the indoor airflow is as required Make any air flow adjustments before continuing with the following procedure Measure outdoor ambient temperature determine whether to use cooling mode or heating mode to check charge Connect gauge set USE Check liquid and vapor line pressures Compare pressures with either heat or cooling mode normal operating COOLING pressures in table 10 Normal Operating Pressures High Stage MODE 60 F 15 C USE Set thermostat for heat cool demand depending on mode being used HEATING USING COOLING MODE When the outdoor ambient temperature is 60 F 15 C and above Target subcooling values second stage high capacity in table 10 are based on 70 to 80 F 21 27 C indoor return air temperature if necess
31. ED ON CFM PROFILE USED OUT PARK COM PWN Y YMd 1X3 Es v Du c9 FAN PWM OUT d FAN PWM OUT contactor SEE CFM PROFILE YELLOW SELECTION TABLE HIGH PRESSURE SWITCH 54 FAN MOTOR YELLOW YELLOW CONTROL SEE TABLE 16 FOR CFM PROFILE swt AT SELECTION OPTIONS Qo m gd PS m WT ml HEAT PUMP CONTROL A175 Figure 34 Fan Motor Control Wiring Jumper Settings Testing and LED Location Page 48 506586 01 10 10 FAN MOTOR CONTROL A177 PULSE WIDTH MODULATION PWM YELLOW WIRE HEAT PUMP CONTROL A175 BLUE WIRE BLACK WIRE VDC VAC ONE YELLOW WIRE FROM PS E24 TERMINAL ON HEAT amet CONTROL A175 AND SECOND YELLOW WIRES ON PIGGYBACK TERMINALS GOES 4 HIGH PRESSURE SWITCH op oj CONTROL BOX INPUT VOLTAGES DURING DEMAND ECM Y1 ONLY 24VDC Variable Speed Motor Control Frane SEHR c3 C5 14 B B B mb RIB R19 EBD ggar ty B E dr aE R26 B Ed Ead FAN OUT PARK COM 29 I lod EXT PWRIR 24VAC INPUT DURING DEMAND ONLY GREEN RED RED YELLOW 4 HIGH PRESSURE SWITCH BLACK BROWN SEE CFM PROFILE SELECTION TABLE YELLOW YELLOW YELLOW YELLOW Lo PS HL PS vi OUT 0 OUT 1 CI BLACK
32. Fully insert the wrench into the valve stem recess Service valve stems are factory torqued from 9 ft lbs for small valves to 25 ft lbs for large valves to prevent refrigerant loss during shipping and handling Using an Allen wrench rated at less than 50Rc risks rounding or breaking off the wrench or stripping the valve stem recess See the Lennox Service and Application Notes C 08 1 for further details and information Page 4 506586 01 10 10 SERVICE VALVES ane ano Operating Angle Type Service Valve 1 Remove stem cap with an appropriately sized wrench 2 Use service wrench with a hex head extension 3 16 for liquid line valve sizes and 5 16 for vapor line valve sizes to back the stem out counterclockwise as far as it will go SERVICE PORT CAP SERVICE PORT CORE VALVE STEM SHOWN OPEN VALVE STEM SHOWN CLOSED INSERT HEX WRENCH HERE INSERT HEX WRENCH HERE TO INDOOR EUN UNIT e Ji SEF STEM CAP TO OUTDOOR UNIT ANGLE TYPE SERVICE VALVE BACK SEATED OPENED When service valve is OPEN the service port is open to linE set indoor and outdoor unit Operating Ball Type Service Valve 1 Remove stem cap with an appropriately sized wrench 2 Use an appropriately sized wrenched to open To open valve rotate stem counterclockwise 90 To close rotate stem clockwise 90 TO INDOOR UNIT TO OPEN ROTATE STEM COUNTERCLOCKWISE 90 BALL SHOWN CLOSED TO CL
33. Installation and service must be performed by a licensed professional installer or equivalent or a service agency CAUTION Physical contact with metal edges and corners while applying excessive force or rapid motion can result in personal injury Be aware of and use caution when working near these areas during installation or while servicing this equipment A IMPORTANT The Clean Air Act of 1990 bans the intentional venting of refrigerant CFCs HCFCs AND HFCs as of July 1 1992 Approved methods of recovery recycling or reclaiming must be followed Fines and or incarceration may be levied for noncompliance WARNING Electric Shock Hazard Can cause injury or death Unit must be grounded in accordance with national and local codes Line voltage is present at all components when unit is not in operation on units with single pole contactors Disconnect all remote electric power supplies before opening access panel Unit may have multiple power supplies A IMPORTANT This model is designed for use in check expansion valve systems only An indoor expansion valve approved for use with HFC 410A refrigerant must be ordered separately and installed prior to operating the system Shipping and Packing List Check unit for shipping damage Consult last carrier immediately if damage is found 1 Assembled outdoor unit 1 Bag assembly which includes the following 1 Bushing for low voltage wiring
34. LENNOX gt 2011 Lennox Industries Inc Dallas Texas USA fA icomfort 50 simple So smart So comfortable SUNSCURCE RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE These instructions are intended as a general guide and do not supersede local codes in any way Consult authorities having jurisdiction before installation NOTICE TO INSTALLER UNIT PLACEMENT It is critical for proper unit operation to place outdoor unit on an elevated surface as described in Unit Placement section on page 7 DEFROST OPERATION It is critical for proper defrost operation to set the defrost termination pins E46 on the heat pump control prior to starting system See Defrost System section on page 32 for further details BRAZING LINE SET TO SERVICE VALVES It is imperative to follow the brazing technique illustrated starting on page 13 to avoid damaging the service valve s internal seals NOTICE thermostat is not included and must be ordered separately e The Lennox icomfort Touch thermostat must be used in communicating application e In non icomfort applications the Lennox ComfortSense 7000 thermostat may be used as well as other non communicating thermostats In all cases setup is critical to ensure proper system operation Field wiring examples for non icomfort applications begin on page 25 See the icomfort Touch thermostat Quick Start Guide for communicating and partial communicatin
35. MER COMPRESSOR ENDS ANTI SHORT CYCLE TIMER BEGINS LED ALERT CODE OR W OUTPUT MODERATE ACTIVE ALERT 418 5 STRIKE CLEARED INCREMENT COUNTER 5 STRIKE REACHES 5 COUNTER WITHIN A SINGLE Y1 DEMAND WAITING FOR W OUTPUT TO LED ALERT DEACTIVATE CODE W OUTPUT MODERATE HARDWARE ALERT 418 FAULT DISPLAYED LOCKOUT ANTI SHORT CYCLE TIMER LED ALERT ENDS CODE OR CRITICAL SERVICES ALERT 419 REQUIRED DISPLAYED LED ALERT CODE OR 1 4 e MODERATE If 5 strike counter has four or less strikes when Y1 demand is terminated or satisfied the strike counter will ALERT 418 reset to zero In a icomfort Touch thermostat enabled setup the thermostat will terminate demand when the CLEARED compressor contactor is de energized If demand is satisfied when alarm is not active the 5 strike counter will reset 2 ockouts can be reset by either cycling power off to the heat pump control s A175 R terminal or placing a jumper on the field test pins E33 between 1 to 2 seconds Figure 30 W Input Fault or Miswire Page 38 506586 01 10 10 Table 13 Ambient RT13 and Coil RT21 Sensors Temperature Resistance Range Degrees Degrees Degrees Degrees Resistance Resistance Ed Resistance E Penh
36. O VAPOR SERVICE VALVE og I NITROGEN HFC 410A TEST FOR LEAKS After the line set has been connected to the indoor and outdoor units check the line set connections and indoor unit for leaks Use the following procedure to test for leaks With both manifold valves closed connect the cylinder of HFC 410A refrigerant to the center port of the manifold gauge set Open the valve on the HFC 410A cylinder vapor only B Open the high pressure side of the manifold to allow HFC 410A into the line set and indoor unit Weigh in a trace amount of HFC 410A A trace amount is a maximum of two ounces 57 9 refrigerant or three pounds 31 kPa pressure Close the valve on the HFC 410A cylinder and the valve on the high pressure side of the manifold gauge set Disconnect the HFC 410A cylinder Connect a cylinder of dry nitrogen with a pressure regulating valve to the center port of the manifold gauge set D Adjust dry nitrogen pressure to 150 psig 1034 kPa Open the valve on the high side of the manifold gauge set in order to pressurize the line set and the indoor unit E After a few minutes open one of the service valve ports and verify that the refrigerant added to the system earlier is measurable with a leak detector F After leak testing disconnect gauges from service ports Figure 13 Leak Test Page 18 506586 01 10 10 Evacuating Line Set and Indoor Coil NOTE Remove cores
37. ORT CORE REMOVED TO ALLOW EXIT POINT FOR NITROGEN FLOW SUCTION VAPOR LINE SERVICE SUCTION VAPOR VALVE LINE INDOOR OUTDOOR UNIT 115 UNIT N lt E c3 NITROGEN Hemp INE LIQUID LINE SERVICE VALVE Figure 9 Brazing Procedures Page 14 506586 01 10 10 WRAP SERVICE VALVES To help protect service valve seals during brazing wrap water saturated cloths around service valve bodies and copper tube stubs Use additional water saturated cloths underneath the valve body to protect the base paint FLOW NITROGEN WARNING Flow regulated nitrogen at 1 to 2 psig through the refrigeration gauge set into the valve stem port connection on the liquid service 1 FIRE PERSONAL INJURY OR PROPERTY valve and out of the suction vapor valve stem port See steps 3A 3B DAMAGE will result if you do not wrap a water and 3C on previous page and below for manifold gauge setup saturated cloth around both liquid and suction line service valve bodies and copper tube stub while BRAZE LINE SET brazing in the line set The braze when complete must be quenched with water to absorb any residual Water saturated cloths must remain water saturated throughout heat the brazing and cool down process Do not open service valves until refrigerant lines and A Braze liquid line to liquid line service valve indoor coil have been leak tested and evacuated Refer to p
38. OSE ROTATE STEM CLOCKWISE 90 SERVICE PORT SERVICE PORT CORE SERVICE PORT CAP TO OUTDOOR STEM CAP UNIT ANGLE TYPE SERVICE VALVE FRONT SEATED CLOSED WHEN SERVICE VALVE IS CLOSED THE SERVICE PORT IS OPEN TO THE LINE SET AND INDOOR UNIT To Access Service Port A service port cap protects the service port core from contamination and serves as the primary leak seal 1 Remove service port cap with an appropriately sized wrench 2 Connect gauge set to service port 3 When testing is completed replace service port cap and tighten as follows e With torque wrench Finger tighten and VOORN torque cap per table 1 l Without torque wrench Finger tighten and 10 use an appropriately sized wrench to turn 9 an additional 1 6 turn clockwise Reinstall Stem Cap Stem cap protects the valve stem from damage and serves as the primary seal Replace the stem cap and tighten as follows 1 12 TURN With Torque Wrench Finger tighten and then torque cap per table 1 Without Torque Wrench Finger tighten and use an appropriately sized wrench to turn an addi tional 1 12 turn clockwise NOTE A label with specific torque requirements may be affixed to the stem cap If the label is present use the specified torque Figure 2 Angle and Ball Service Valves Page 5 XP17 SERIES Recovering Refrigerant from Existing System Disconnect all power to the existing outdoor unit at the disconnect Connect
39. Pressure auto reset trip at 25 psig reset at 40 COMPRESSOR PROTECTION FIVE STRIKE LOCKOUT SAFETY FUNCTION The five strike lockout safety function is designed to protect the unit s compressor from damage The five strike feature is used for high pressure S4 and low S87 pressure switch trips and W input fault or miswire Resetting Five Strike Lockout Once the condition has been rectified power to the heat pump control s R terminal must be cycled OFF or a jumper placed on the FIELD TEST pins between 1 to 2 seconds to reset the heat pump control Defrost System The heat pump control A175 measures differential temperatures to detect when the system is performing poorly because of ice build up on the outdoor coil The controller self calibrates see figure 26 when the defrost system starts and after each system defrost cycle The heat pump control monitors ambient temperature outdoor coil temperature and total run time to determine when a defrost cycle is required The coil temperature sensor is designed with a spring clip to allow mounting to the outside coil tubing The location of the coil sensor is important for proper defrost operation see figure 1 for location of coil sensor NOTE The heat pump control accurately measures the performance of the system as frost accumulates on the outdoor coil This typically will translate into longer running time between defrost cycles as more frost accumulates on the
40. URY OR DEATH UNIT MUST BE COMPRESSOR GROUNDED IN ACCORDANCE WITH CONTACTOR LOCAL AND NATIONAL CODES E ye an 22 z is OF OUTDOOR FAN CONTROL NON COMMUNICATING WIRING 000 OG CRANKCASE HEATER z7 A74 iCOMFORT a THERMOSTAT LINE VOLTAGE FIELD INSTALLED CLASS II VOLTAGE FIELD WIRING DENOTES OPTIONAL COMPONENTS COMPRESSOR OUTDOOR UNIT TA EQUIPMENT GROUND 9999 CAPACITOR L HEAT PUMP LENNOX OUTDOOR UNITS XP17 COMPRESSOR NOTE New Form No IF ANY WIRE IN THIS APPLIANCE IS REPLACED IT 537379 01 MUST BE REPLACED WITH WIRE OF LIKE SIZE RATING INSULATION THICKNESS AND TERMINATION Litho U S A Figure 15 Typical XP17 Wiring Page 22 506586 01 10 10 Heat Pump Control A175 Jumpers and Terminals HEAT PUMP CONTROL ONE STAGE Table 3 on page 24 provides additional information concerning jumpers links and connections for the heat pump control DS11 DS14 11 and DS m E37 LED ALERT CODES M SECOND DELAY COMPRESSOR SHIFT DELAY SECOND DELAY E33 FIELD TEST LENNGXD EMERSON pr Climate Technologies DEGREE TARGET 90 DEGREE TARGET O 70 DEGREE TARGET 90F a a 50 DEGREE TARGET Open DEFROST TERMINATION TEMPERATURE DS12 RECEIVING DATA INDICATOR COMMUNICATION MODE ONLY CUT FOR HUMIDITROL APPLICATION TWO STAGE UNITS ONLY Figure 16 Heat Pump Control A175 Jumpe
41. a gauge set clean recovery cylinder anda recovery switch or main fuse box breaker panel machine to the service ports of the existing unit Use the instruction provided with the recovery machine to make the connections 1 POWER 2 CONNECT MANIFOLD GAUGE SET SERVICE DISCONNECT SWITCH MANIFOLD GAUGES RECOVERY MACHINE Remove existing HCFC 22 refrigerant using one of the following methods CLEAN RECOVERY OUTDOOR UNIT REFRIGERANT below CYLINDER IMPORTANT Some system configurations may contain higher than normal refrigerant charge due to either large internal coil volumes and or long line sets METHOD 1 Us this method if the existing outdoor unit is not equipped with shut off valves or if the unit is not operational and you plan to use the existing HCFC 22 to flush the system Remove all HCFC 22 refrigerant from the existing system Check gauges after shutdown to confirm that the entire system is completely void of refrigerant METHOD 2 Use this method if the existing outdoor unit is equipped with manual shut off valves and you plan to use new 22 refrigerant to flush the system The following devices could prevent full system charge recovery into the outdoor unit Outdoor unit s high or low pressure switches if applicable when tripped can cycle the compressor OFF Compressor can stop pumping due to tripped internal pressure relief valve Compressor has internal vacuum protection that is desig
42. age Inputs Input Call for Voltage Cooling Present Between 24VDC YES ECM Y1 and ECM and 32 VDC NO NONE YES 24VAC EXT ECM R and ECM C NO NONE Page 46 506586 01 10 10 DEMAND BEGINS MISMATCHED REPLACE FAN MOTOR TM USED CONTROL BOARD AS DEFAULT FAN CRC FAILURE MOTOR SPEED REPLACE FAN MOTOR USED J CONTROL BOARD SINGLE STAGE ECM1 Y1 FAN MOTOR i STAGE LED INDICATOR ONE OREBA je ONY oR RPMSETPER SLOW FLASH AND ONE OPERATION ONLY eens SHORT PAUSE FOR SINGLE gt STAGE OR EDA OPERATION A NO LED RPM INDICATOR DEMAND EXAMPLE 2 ENDED UNIT 5 SLOW FLASHES AND ONE EU REMIS EE LONG PAUSE Figure 32 Fan Motor Control One Stage LED Sequence of Operation TOP GRILLE OR FAN MOTOR MOUNT ADJUSTMENT FOR FAN CLEARANCE Sometimes during shipping either the fan motor mounting or top grille may become out of alignment This may cause the fan motor blade to not clear the orifice ring If this situation occurs simply adjust either or both the fan motor mount or top grille positions to allow proper clearance The top grille four fastener insertion points to the plastic top and motor mount locations are larger than the fasteners used to se
43. ary operate heating to reach that temperature range then set thermostat to cooling mode setpoint to 68 F 20 C which should call for second stage high stage cooling When pressures have stabilized continue with Step 6 NOTE The reference table is a general guide Expect minor pressure variations Significant differences may mean improper charge or other system problem USING HEATING MODE When the outdoor ambient temperature is below 60 F 15 C Target subcooling values second stage high capacity in table 10 are based on 65 75 F 18 24 C indoor return air temperature if necessary operate cooling to reach that temperature range then set thermostat to heating mode setpoint to 77 F 25 C which should call for second stage high stage heating When pressures have stabilized continue with Step 6 Read the liquid line temperature record in the LIQ space Read the liquid line pressure then find its corresponding temperature in the temperature pressure chart listed in table 11 and record it in the SAT space Subtract LIQ temperature from SAT temperature to determine subcooling record it in SC space Compare SC results with tables 4 through 9 being sure to note any additional charge for line set and or match up If subcooling value is greater than shown in tables 4 through 9 for the applicable unit remove refrigerant if less than shown add refrigerant If refrigerant is added or removed repea
44. ates the specific condition through system LED alert codes The function is capable of detecting both mechanical and electrical system problems DS15 AND DS13 COMPRESSOR FAULT AND LOCKOUT LED CODES DS15 Yellow and DS13 Red LEDs indicate non communicating mode diagnostics conditions that are listed in table 15 These LEDs display the most common fault conditions in the system When an abnormal condition is detected this function communicates the specific condition through system LED alert codes The function is capable of detecting both mechanical and electrical system problems A IMPORTANT DS15 and DS13 compressor LED fault and lockout codes do not provide safety protection The is a monitoring function only and cannot control or shut down other devices RESETTING FAULT AND LOCKOUT LED CODES All LED fault and lockout codes can be reset manually or automatically 1 Manual Reset Manual reset can be achieve by one of the following methods e Disconnecting R wire from the heat pump control s R terminal e Turning the indoor unit off an on again After power up existing code will display for 60 seconds and then clear 2 Automatic Reset After a fault or lockout is detected the heat pump control continues to monitor the unit s system and compressor operations When if conditions return to normal the alert code is turned off automatically Table 14 System Status Fault and Lockout LED Codes and Rela
45. be checked by ohming across pins shown in table 12 NOTE When checking the ohms across a sensor be aware that a sensor showing a resistance value that is not within the range shown in table 12 may be performing as designed However if a shorted or open circuit is detected then the sensor may be faulty and the sensor harness will need to be replaced Ambient Temperature Sensor RT13 See table 12 for sensor range If the ambient sensor is detected as being open shorted or out of the temperature range of the sensor the heat pump control will not perform demand defrost operation The heat pump control will revert to time temperature defrost operation and will display the appropriate alert code Heating and cooling operation will be allowed in this fault condition Coil Temperature Sensor RT21 See table 12 for sensor range If the defrost coil sensor is open shorted or out of the temperature range of the sensor the heat pump control will not perform demand or time temperature defrost operation and will display the appropriate fault code Heating and cooling operation will be allowed in this fault condition High Discharge Line Temperature Sensor This model does not use a high discharge line temperature sensor The cable assembly attached to the heat pump control s E30 connection has a 10K resister installed between pins 1 and 2 as illustrated in figure 24 No alerts or alarms would be generated if resistor is damage
46. check for obstructions This would also apply to an auxiliary drain if installed Thermostat Operation See the ComfortSense 7000 thermostat homeowner manual for instructions on how to operate your thermostat Heat Pump Operation Your new Lennox heat pump has several characteristics that you should be aware of e Heat pumps satisfy heating demand by delivering large amounts of warm air into the living space This is quite different from gas or oil fired furnaces or an electric furnace which deliver lower volumes of considerably hotter air to heat the space Do not be alarmed if you notice frost on the outdoor coil in the winter months Frost develops on the outdoor coil during the heating cycle when temperatures are below 45 F 7 C The heat pump control activates a defrost cycle lasting 5 to 15 minutes at preset intervals to clear the outdoor coil of the frost e During the defrost cycle you may notice steam rising from the outdoor unit This is a normal occurrence The thermostat may engage auxiliary heat during the defrost cycle to satisfy a heating demand however the unit will return to normal operation at the conclusion of the defrost cycle Extended Power Outage The heat pump is equipped with a compressor crankcase heater which protects the compressor from refrigerant slugging during cold weather operation If power to your unit has been interrupted for several hours or more set the room thermostat selector to the
47. chnician at the same electrostatic potential Neutralize electrostatic charge by touching hand and all tools on an unpainted unit surface before performing any service procedure Page 20 506586 01 10 10 3 A ROUTE CONTROL WIRES NON COMMUNICATING Install low voltage control wiring from outdoor to indoor unit and from thermostat to indoor unit CONTROL BOX Uu A Run 24VAC control wires through hole with grommet B 24VAC control wire connections to heat pump control 175 NOTE Do not bundle any excess 24VAC control wires inside control box NOTE Wire tie provides low voltage wire strain relief and to maintain separation of field installed low and high voltage circuits NOTE For proper voltages select control wires gauge per table below WIRE RUN LENGTH AWG INSULATION TYPE LESS THAN 100 30 METERS 18 TEMPERATURE RATING MORE THAN 100 30 METERS 16 35 C MINIMUM HEAT PUMP CONTROL A175 B ROUTE CONTROL WIRES COMMUNICATING Maximum length of wiring 18 gauge for all connections on the RSBus is limited to 1500 feet 457 meters Color coded temperature rating 95 F 35 C minimum solid core Class II Rated Wiring 4 ROUTE HIGH VOLTAGE AND GROUND WIRES Any excess high voltage field wiring should be trimmed and secured away from any low voltage field wiring To facilitate a conduit a cutout is located in the bottom of the control box Con
48. ckout function if applicable No other functions will be executed and unit will continue in the y mode it was operating ACTIVE OLine Status INACTIVE Y Y If in COOLING Mode If in DEFROST Mode If in HEATING Mode Y Y Y The unit will terminate defrost and enter HEAT MODE uncalibrated with defrost timer set for a maximum 34 minute test No further test mode operation will be executed until the jumper is removed from the TEST pins and reapplied If no ambient or coil sensor fault ex ist unit will go into DEFROST MODE If ambient or coil faults exist open or shorted unit will remain in HEAT MODE Y NOTE Heat pump control cannot be force into defrost mode when the ambient temperature input from the RT13 sensor is above 65 F 18 C NOTE If ambient or coil fault is detected the board will not execute the TEST mode If jumper on TEST pins remains in place for more than five seconds Y If jumper on TEST pins is removed before a maximum of five seconds The unit will return to HEAT MODE un calibrated with defrost timer set for 34 minutes The unit will remain in DEFROST MODE until termination on time or temperature Figure 27 Test Pin E33 Functions Page 35 XP17 SERIES LOW INITIAL TRIP PRESSURE COMPRESSOR Y1 DEMAND SWITCH S87 CLOSED CONTACTOR SWITCH IS
49. cles or after power reset XP17 SERIES Heat Pump Control LEDs DS15 Yellow 4 flashes then pause DS13 Red icomfort Touch Thermostat Display Critical Alert Code 404 Condition Locked rotor Possible Cause s Compressor has a locked out due to run capacitor short bearings are seized excessive liquid refrigerant Solution 1 Run capacitor has failed 2 Low line voltage contact utility if voltage at discon nect is low e Check wiring connections 3 Excessive liquid refrigerant in the compressor Compressor bearings are seized Clearing Status Clears after power reset or four normal compressor cycles 5 flashes then pause Critical Alert Code 405 Open circuit Compressor has an open circuit due to power dis connection fuse is open or other similar conditions 1 Outdoor unit power disconnect is open 2 Unit circuit breaker or fuse s is open 3 Unit contactor has failed to close e Check compressor contactor wiring and connectors Check for compressor burned pitted or open Check wiring and connectors between supply and compressor Check for low pilot voltage at compressor contactor coil 4 High pressure switch is open and requires manual reset 5 Open circuit in compressor supply wiring or connections 6 Unusually long compressor protector reset time due to extreme ambient temperature 7 Compressor windings are damaged e Check compress
50. counter has four or less strikes when Y1 demand is terminated DE ENERGIZED or satisfied the strike counter will reset to zero In a icomfort Touch thermostat enabled setup the thermostat will terminate demand when the compressor contactor is de energized If demand is satisfied when alarm is not active the 5 strike counter will reset COMPRESSOR ANTI SHORT CYCLE TIMER BEGINS 2 Lockouts can be reset by either cycling power off to the heat pump con trol s A175 R terminal or placing a jumper on the field test pins E33 be tween 1 to 2 seconds 5 STRIKE COUNTER REACHES 5 WITHIN A SINGLE Y1 DEMAND INCREMENT 5 STRIKE COUNTER LED ALERT CODE OR MODERATE ALERT 412 DISPLAYED HIGH PRESSURE SWITCH S4 LOCKOUT LED ALERT ANTI SHORT CODE OR CYCLE TIMER CRITICAL SERVICE j ENDS ALERT 413 REQUIRED CLEARED COMPRESSOR CONTACTOR ENERGIZED LED ALERT CODE OR MODERATE ALERT 412 DISPLAYED HIGH PRESSURE SWITCH S4 NORMAL OPERATION SERVICE REQUIRED WAITING FOR PRESSURE SWITCH TO CLOSED CLOSE Figure 29 High Pressure Switch 84 Sequence of Operation Page 37 XP17 SERIES Y1 DEMAND INITIAL TRIP SWITCH IS IGNORED FOR 90 SECONDS COMPRESSOR CONTACTOR ENERGIZED W OUTPUT NORMAL ACTIVE OPERATION COMPRESSOR CONTACTOR DE ENERGIZED LED ALERT COMPRESSOR CODE OR W OUTPUT ANTI SHORT MODERATE ACTIVE CYCLE TIMER ALERT 418 BEGINS DISPLAYED ANTI SHORT CYCLE TI
51. covery so that all of the HCFC 22 vapor is recovered Allow the recovery machine to pull down to 0 the system Close the valve on the inverted HCFC 22 drum and the gauge set valves Pump the remaining refrigerant out of the recovery machine and turn the machine off 3 Figure 11 Flushing Line Set and Indoor Coil Page 16 506586 01 10 10 Installing Indoor Expansion Valve This outdoor unit is designed for use in systems that use check expansion valve metering device See the Lennox XP17 Engineering Handbook for approved check expansion valve kit match ups and application information The check expansion valve unit can be installed internal or external to the indoor coil In applications where an uncased coil is being installed in a field provided plenum install the check expansion valve in a manner that will provide access for field servicing of the check expansion valve Refer to below illustration for reference during installation of check expansion valve unit INDOOR EXPANSION VALVE INSTALLATION Remove the field provided fitting that temporary 1 2 Turn TWO PIECE reconnected the liquid line to the indoor unit s distributor PATCH PLATE Uncased Coil Shown assembly UNCASED Install one of the provided Teflon rings around the STUB POIRONLY PRUDE END CHECK stubbed end of the check expansion valve and lightly 9 HOUSING EXPANSION lubricate the connector threads and expose surface of 8 TE N the Teflon ring with refrigerant oil
52. cure the grille and fan motor mounts Use the procedures provided in figure 33 to adjust for fan clearance GRILLE MOUNTING POINTS PUSH FORWARD PUSH FORWARD FASTENER INSERTION POINT FAN MOTOR MOUNTING POINTS The four mounting point holes that secure the top grille to the plastic top are larger than the fasteners used to secure the grille this is also true for the four fasteners securing the fan motor to the top grille To provide more clearance preform either or both of the following procedures TOP GRILLE ADJUSTMENT loosen the four grille mounting fasteners and push the grille forward tighten mounting hardware if there is still insufficient clearance proceed to Fan Motor Position Adjustment FAN MOTOR POSITION ADJUSTMENT Loosen the four fan motor grille mounting fasteners and push the fan motor forward tighten mounting hardware GRILLE MOUNTING POINTS ORIFICE RING Figure 33 Fan Blade Clearance Adjustment Page 47 XP17 SERIES CFM Profile Pin Select FAN MOTOR CONTROL A177 PULSE WIDTH MODULATION PWM 102791 01 Profile Select CONTROL BOX HEAT PUMP CONTROL A175 953 ZA ZW93 LA LOS VERIFY DC VOLTAGE OUTPUT USING FAN PWM OUT AND COM TERMINALS SEE TABLE 16 FOR OPTIMAL DC VOLTAGE BAS
53. de and DC Voltage Output GFMProfilePinSelet Profile Pin Select ECM1 Y1 02 DC Volt XP17 048 060 048 060 Model LED Code ee XP17 024 ON 12 7 XP17 030 ON 14 3 XP17 036 042 ON 19 2 i EIDE Code indicates fan motor LED Er sequence For LED p 9 indicates 9 slow flashes and pause Table 17 Fan Motor Control Error Fault LED Codes Unit Status Motor Control LED Possible Possible Cause Internal ELI Mismatched RPM Fast flash with no PWM does not pause match target CRC Failure Constant ON Microcontroller CRC failure Table 18 19 Fan Motor Control Stage LED Indicator Codes One Stage Low Stage One slow flash then Operation ECM1 Y1 ONLY short pause Table 20 Fan Motor Control Flash and Pause Durations Flash Flash Three flashes per second Slow Flash One flash per second Short Pause Two seconds of OFF time Testing Use the following subsections to verify and test the fan motor control A177 Verifying Jumper Settings J2 The unit is shipped from the factory with the default fan motor speed setting in RPMs required for each specific model Use the table 16 verify that jumpers are set correctly for the specific unit Verifying LED Status Codes During start up the fan motor control A177 LED will display any error conditions If error conditions exist then no other codes will display If no error conditions are present then the stage statu
54. e inspections will determine the necessary need to wash the unit including the outdoor coil Consult your installing contractor for proper intervals procedures for your geographic area or service contract Indoor Unit Clean or change filters Lennox blower motors are prelubricated and permanently sealed No more lubrication is needed Adjust blower speed for cooling Measure the pressure drop over the coil to determine the correct blower CFM Refer to the unit information service manual for pressure drop tables and procedure Belt Drive Blowers Check belt for wear and proper tension Check all wiring for loose connections Check for correct voltage at unit blower operating Check amp draw on blower motor Motor Nameplate Actual Indoor Coil Clean coil if necessary Check connecting lines joints and coil for evidence of oil leaks Check condensate line and clean if necessary Locations with Possibility of Heavy Snow or Freezing Rain Accumulation Heavy snow and or freezing rain can interfere with the 5 Check for correct voltage at unit unit operating performance of the outdoor fan assembly Lennox 6 Check amp draw on outdoor fan motor recommends use of the optional snow guard X8782 in Motor Nameplate Actual these areas 7 Inspect drain holes in coil compartment base and clean if necessary NOTE If insufficient heating or cooling occurs the unit should be gauged and refrige
55. ect all factory and field installed wiring for loose connections GAUGE SET CONNECTIONS FOR TESTING AND CHARGING B TRUE SUCTION PORT CONNECTION CHARGE IN LIQUID PHASE DIGITAL SCALE INSIDE OUTDOOR UNIT REFRIGERANT TANK A i 3 Add or remove refrigerant using the weigh in method provided in figure 21 and verifying charge using subcooling method described in figure 22 MANIFOLD GAUGE SET LOW HIGH IC O OUTDOOR UNIT TO LIQUID TEMPERATURE SENSOR LINE SERVICE LIQUID LINE TEMPERATURE SENSOR VALVE AClose manifold gauge set valves and connect the center hose to a cylinder of HFC 410A Set for liquid phase charging BConnect the manifold gauge set s low pressure side to the true suction port CConnect the manifold gauge set s high pressure side to the liquid line service port DPosition temperature sensor on liquid line near liquid line service port Figure 19 Gauge Set Connections Page 27 XP17 SERIES ADDING OR REMOVING REFRIGERANT e Temperature rise between the return air and supply air This system uses HFC 410A refrigerant which operates at temperatures at the indoor coil blower unit much higher pressures than HCFC 22 The pre installed 6 liquid line filter drier is approved for use with HFC 410A only Do not replace it with components designed for use Measuring voltage
56. ecure finger tight then tighten an additional one sixth 1 6 of a turn as illustrated Figure 14 Evacuating System Page 19 XP17 SERIES A IMPORTANT Use a thermocouple or thermistor electronic vacuum gauge that is calibrated in microns Use an instrument capable of accurately measuring down to 50 microns 4 WARNING Danger of Equipment Damage Avoid deep vacuum operation Do not use compressors to evacuate a system Extremely low vacuums can cause internal arcing and compressor failure Damage caused by deep vacuum operation will void warranty Evacuating the system of non condensables is critical for proper operation of the unit Non condensables are defined as any gas that will not condense under SWITCH Refer to the unit nameplate for minimum circuit ampacity and maximum fuse or circuit breaker HACR per NEC Install power wiring and properly sized disconnect switch sw CIRCUIT AND INSTALL DISCONNECT SERVICE DISCONNECT SWITCH NOTE Units are approved for use only with copper conductors Ground unit at disconnect switch or to an earth ground WARNING temperatures and pressures present during operation of an air conditioning system Non condensables and water suction combine with refrigerant to produce substances that corrode copper piping and compressor parts In the U S A wiring must conform with current local codes and the current National Electric Code NEC In Canada wiring must conform
57. erature Ambient Temperature Return Air Temperature System Refrigerant Charge Refer to manufacturer s information on unit or installation instructions for required subcooling and approach temperatures Subcooling Saturated Condensing Temperature A SUBCOOLING minus Liquid Line Temperature B Approach Liquid Line Temperature A APPROACH minus Outdoor Air Temperature B Indoor Coil Temp Drop 18 to 22 F Return Air Temperature A COIL TEMP DROP minus Supply Air Temperature B Page 54 506586 01 10 10
58. ess and plumbing panels Remove any shipping clamps holding the liquid line and distributor as sembly Using two wrenches disconnect liquid line from liquid line orifice hous ing Take care not to twist or damage distributor tubes during this pro cess Remove and discard fixed orifice valve stem assembly if present and Teflon washer as illustrated above Use a field provided fitting to temporary reconnect the liquid line to the indoor unit s liquid line orifice housing 2 CONNECT GAUGES AND EQUIPMENT FOR FLUSHING PROCEDURE INVERTED HCFC 22 CYLINDER CONTAINS CLEAN HCFC 22 TO BE USED FOR FLUSHING GAUGE MANIFOLD A VAPOR LINE SERVICE VALVE NZ EXISTING INDOOR OUTDOOR UNIT CLOSED RECOVERY MACHINE Inverted HCFC 22 cylinder with clean refrigerant to the vapor service valve HCFC 22 gauge set low side to the liquid line valve HCFC 22 gauge set center port to inlet on the recovery machine with an empty recovery tank to the gauge set Connect recovery tank to recovery machines per machine instructions TYPICAL EXISTING EXPANSION VALVE REMOVAL PROCEDURE UNCASED COIL SHOWN STUB END LIQUID LINE ORIFICE B CHECK EXPANSION DISTRIBUTOR VALVE veer TEFLON J SENSING _ LINE EQUALIZER E LIQUID LINE ASSEMBLY WITH BRASS NUT MALE EQUALIZER LINE FITTING SENSING BULB LIQUID LINE A On fully cased coils remove the coil access and
59. f mercury perform the following Close manifold gauge valves Close valve on vacuum pump e Turn off vacuum pump e Disconnect manifold gauge center port hose from vacuum pump Attach manifold center port hose to a dry nitrogen cylinder with pressure regulator set to 150 psig 1034 kPa and purge the hose e Open manifold gauge valves to break the vacuum in the line set and indoor unit Close manifold gauge valves Shut off the dry nitrogen cylinder and remove the manifold gauge hose from the cylinder Open the manifold gauge valves to release the dry nitrogen from the line set and indoor unit Reconnect the manifold gauge to the vacuum pump turn the pump on and continue to evacuate the line set and indoor unit until the absolute pressure does not rise above 500 microns 29 9 inches of mercury within a 20 minute period after shutting off the vacuum pump and closing the manifold gauge valves When the absolute pressure requirement above has been met disconnect the manifold hose from the vacuum pump and connect it to an upright cylinder of HFC 410A refrigerant Open the manifold gauge valve 1 to 2 psig in order to release the vacuum in the line set and indoor unit Perform the following 1 6 TURN Close manifold gauge valves Shut off HFC 410A cylinder Reinstall service valve cores by removing manifold hose from service valve Quickly install cores with core tool while maintaining a positive system pressure Replace stem caps and s
60. from service valves if not already done A Connect low side of manifold gauge set with 1 4 SAE in line tee to vapor line service valve Connect high side of manifold gauge set to liquid line service valve real 434000 1 4 SAE TEE WITH ve Connect micron gauge available SWIVEL COUPLER connector on the 1 4 SAE in line tee A Connect the vacuum pump with vacuum gauge to the center port of the manifold gauge set The center port MICRON line will be used later for both the GAUGE 1 HFC 410A and nitrogen containers NITROGEN 1 CONNECT GAUGE SET TO VAPOR SERVICE VALVE HFC 410A VACUUM PUMP TO LIQUID LINE SERVICE VALVE 1 2 EVACUATE THE SYSTEM eas A Open both manifold valves and start the vacuum pump MINIMUM 3 8 HOSE B Evacuate the line set and indoor unit to an absolute pressure of 23 000 microns 29 01 inches of mercury NOTE During the early stages of evacuation it is desirable to close the manifold gauge valve at least once A rapid rise in pressure indicates a relatively large leak If this occurs repeat the leak testing procedure NOTE The term absolute pressure means the total actual pressure within a given volume or system above the absolute zero of pressure Absolute pressure in a vacuum is equal to atmospheric pressure minus vacuum pressure When the absolute pressure reaches 23 000 microns 29 01 inches o
61. g field wiring connections 06 11 Page 1 INSTALLATION INSTRUCTIONS Dave Lennox Signature Collection XP17 System HEAT PUMPS Technical 506586 01 Publications 06 11 Litho U S A Supersedes 05 11 TABLE OF CONTENTS General 1 Unit 5 0 8 2 Model Number Identification 2 Typical Unit Parts Arrangement 3 Shipping and Packing List 4 Using Manifold Gauge 5 4 Operating Service Valves 4 Recovering Refrigerant from Existing System 6 Unit Placement 7 Removing and Installing Panels 9 New or Replacement Line Set 11 Flushing the System 16 Brazing Connections 13 Flushing Line Set and Indoor Coil 16 Installing Indoor Expansion Valve 17 Leak Test Line Set and Indoor Coil 18 Evacuating Line Set and Indoor Coil 18 Electrical cae mre E EE Rp ERA E 20 Heat Pump Control A175 Jumpers and Terminals 23 Field Control Wiring 25 Servicing Unit Delivered Void of Charge 27 Unit Stare ied term mets 27 System Refrigerant 27 Air Handler Coil Matchups and Targeted Subcooling Values vater ou gd ed desnadeio
62. igeration lines Oxygen when exposed to a spark or open flame can cause fire and or an ex plosion that could result in property damage personal injury or death Page 13 XP17 SERIES 1 PIPING PANEL REMOVAL AND PREPARING LINE CAP AND CORE REMOVAL SET Remove service cap and core from both the suction vapor and liquid line service ports Remove piping panel for easier access to service valves Cut ends of the refrigerant lines square free from nicks or dents and debur SERVICE PORT CAP the ends The pipe must remain round Do not crimp end of the line SERVICE PORT CORE U cH LINE SET SIZE MATCHES SERVICE VALVE CONNECTION CUT AND DEBUR SERVICE VALVE CONNECTION COPPER TUBE STUB LIQUID LINE SERVICE VALVE SERVICE PORT CORE AN SERVICE O PORT CAP LINE SET SIZE IS SMALLER THAN CONNECTION SUCTION VAPOR LINE SERVICE VALVE DO NOT CRIMP SERVICE VALVE CONNECTOR WHEN PIPE IS SMALLER THAN CONNECTION ATTACH THE MANIFOLD GAUGE SET FOR BRAZING LIQUID AND SUCTION VAPOR LINE SERVICE VALVES Connect gauge set low pressure side to liquid line service valve service port Connect gauge set center port to bottle of nitrogen with regulator With valve core removed from the suction vapor line service port nitrogen flow will have an exit point ATTACH GAUGES SUCTION VAPOR SERVICE PORT MUST BE OPEN AND SERVICE P
63. ing fast flash Ls Coil sensor If the outdoor coil temperature sensor is detected as being open or shorted the heat emang tastas Code 417 problem pump control will not perform defrost operations o o Not Heat pump Indicates that heat pump control has an internal component failure Cycle 24 volt n applicable control failure power to heat pump control If code does not clear replace the heat pump control Page 40 506586 01 10 10 System fault and lockout LED DS11 DS14 alarm codes takes precedence over system status LED codes cooling heating stages or defrost dehumidification Only the latest active LED fault or lockout alarm code if present will be displayed If no fault or lockout codes are active then system status LEDs are routinely displayed See notes 1 and 2 in table below for duration of fast slow flashes and pause Heat Pump Control LEDs DS11 Green DS14 Red 1 fast flash then pause icomfort Touch Thermostat Display Not applicable Condition Single stage compressor heating 2 fast flashes then pause Not applicable Defrost 1 fast flash then pause Off Not applicable Single stage compressor cooling 2 fast flashes then pause Not applicable Dehumidification mode Possible Cause s Solution These are codes that show status of operation whether the system is operating in either in first or second stage heating or cooling operation defrost or in
64. ing sequence is followed 1 Display error conditions see table 17 if present 2 If no errors are detected the LED code indicating stage operation see table 18 will display the applicable code and then a long pause 3 The fan motor speed RPM revolutions per minute indicator is displayed next see table 16 4 There is a short pause The above sequence will continue to repeat if a thermostat demand is present See figure 32 for LED sequence and table 18 for description of flash and pause durations Remove both wires brown and black from the J2 terminal on the fan motor control A177 Room thermostat should be in OFF position unit in idle mode no heating or cooling demands Turn main power 240 volt ON to unit Connect 9 Volt battery to fan motor plugs as noted in picture below Fan motor should run at a reduced fan speed If fan motor does not run then replace fan motor assembly FAN MOTOR CONTROL REMOVE BOTH LEADS FROM J2 TERMINALS BLACK LEAD BROWN LEAD FAN PWM OUT PARK COM BLACK LEAD CONNECT B4 FAN MOTOR BLACK COMMON WIRE TO 9V BATTERY NEGATIVE TERMINAL NEGATIVE TERMINAL BLACK LEAD BROWN LEAD BROWN LEAD CONNECT B4 FAN MOTOR WIRE TO 9V BATTERY POSITIVE TERMINAL b POSITIVE TERMINAL gt 3 t xN FULLY CHARGED 9V BATTERY Figure 31 Fan Motor B4 Test Page 45 XP17 SERIES Table 16 Fan Motor Control RPM LED Co
65. l when using the ComfortSense 7000 catalog number Y0349 only Resistor Kit catalog number 47W97 required and ordered separately 3 Cut on board link W951 clippable wire from R O HEAT PUMP for heat pump applications 4 Cut on board link clippable wire DS R for Humiditrol or Harmony 11 applications This will slow the indoor blower motor to the lowest speed setting See furnace installation instruction or engineering handbook for lowest fan speed information NOTE For defrost temper with furnace the optional 67M41 temper kit would be wired between W of from the heat pump control A175 to the W1 of the furnace control The kit allows for the furnace to cycle on and off during a defrost It protects the compressor from high refrigeration pressures during defrost Figure 18 ComfortSense 7000 Series Thermostat Furnace One Stage Heat Pump Page 26 506586 01 10 10 Servicing Units Delivered Void of Charge 3 If the outdoor unit is void of refrigerant clean the system using the procedure described below 1 Leak check system using procedure outlined on page 18 2 Evacuate the system using procedure outlined on 5 19 3 Use nitrogen to break the vacuum and install a new filter drier in the system 4 Evacuate the system again using procedure outlined on page 19 6 5 Weigh in refrigerant using procedure outlined in figure 21 6 Monitor the system to determine the amount of 7 moisture remai
66. led across W1 W2 and W3 For one stage electric heat do not remove factory installed metal jumpers Air handler control ships from factory with metal jumpers installed across W1 W2 and W3 For two stage electric heat remove factory installed metal jumper between W1 to W2 Then connect thermostat wire between the air handler control s W2 and the thermostat s W2 terminal Cut on board link clippable wire from R O HEAT PUMP for heat pump applications Cut on board link clippable wire DS R for Humiditrol or Harmony III applications This will slow the indoor blower motor to the lowest speed setting See air handler installation instruction or engineering handbook for lowest fan speed information Figure 17 ComfortSense 7000 Series Thermostat Air Hander One Stage Heat Pump Page 25 XP17 SERIES Furnace Control ComfortSense 7000 Thermostats One Stage Catalog Y0349 or Y2081 Heat Pump Control On board link 8 0 1 1 Low voltage thermostat wiring 1 4 T 1 9 9 69 9 9 gt 9 OG OG GG 000 00006900 Thermostat T terminals are used for outdoor sensor input Use for thermostat s outdoor temperature display optional R to L connection is required for this mode
67. line voltage contact utility if voltage at discon nect is low e Check wiring connections Clears after volt age is higher than 20VAC for two seconds or after power re set Fast simultaneous flashing of DS11 DS13 DS14 and DS15 OEM Mode Factory test mode 1 Pause duration is two 2 seconds 2 Fast flash duration is 1 2 second Slow flash duration is one 1 second 3 Initially a moderate status is displayed and is escalated to critical if alarm exists for more than 10 minutes 506586 01 10 10 Page 44 Field Configuration and Testing This section provides procedures for configuring adjusting and testing various components of this unit Fan Motor B4 Testi Procedure Fan Motor Control A177 Configuration and Testing Grille and Fan Motor Mounting Adjustment Fan Clearance e Heat Pump Control A175 Unit Nominal Capacity Code configuration FAN MOTOR B4 TEST PROCEDURE The following procedure can be used to test the fan motor operation A fully charged 9V battery will be required for this procedure See figure 31 for complete test procedure This is a test that will verify that the motor does operate Verify main 240 volt power if OFF to unit FAN MOTOR CONTROL A177 OPERATION AND TROUBLESHOOTING This section provides information concerning operation and testing of the fan control Fan Motor Control Sequence of Operation During start up the follow
68. nd installing a high efficiency outdoor unit A IMPORTANT Refrigerant lines must not contact structure Liquid lines that meter the refrigerant such as RFC1 liquid lines must not be used in this application Existing line set of proper size as listed in table 2 may be reused If system was previously charged with HCFC 22 refrigerant then existing line set must be flushed see Flushing the System on page 16 Field refrigerant piping consists of liquid and vapor lines from the outdoor unit to the indoor unit coil braze connections Use Lennox L15 sweat non flare series line set or field fabricated refrigerant line sizes as listed in table 2 Table 2 Refrigerant Line Set Inches mm L15 Line Sets Feet Meters 024 and 030 3 8 10 3 4 19 L15 line set sizes are depen dent on unit match up See XP17 Engineering Handbook to determine correct line set sizes 036 042 and 048 3 8 10 7 8 22 1 1 8 060 3 8 10 29 Field Fabricated NOTE Some applications may required a field provided 7 8 to 1 1 8 adapter NOTE When installing refrigerant lines longer than 50 feet see the Lennox Refrigerant Piping Design and Fabrication Guidelines or contact Lennox Technical Support Product Applications for assistance To obtain the correct information from Lennox be sure to communicate the following information e Model XP17 and size of unit
69. nect conduit to the control box using a proper conduit fitting PIPING PANEL CONTROL BOX HIGH VOLTAGE GROUND IUG CONDUIT HOLE CONTACTOR E IHIGH VOETAGE WATERTIGHT CONDUIT FITTING WIRING ENTRY POINTS WATERTIGHT FLEXIBLE CONDUIT TO SERVICE DISCONNECT BOX ELECTRICAL INLET CONTROL WIKING LOW VOLTAGE USE BUSHING PROVIDED IN BAG ASSEMBLY HERE ACCESS VIEW Page 21 XP17 SERIES CFM PROFILE SELECTION 177 RT13 RT21 1 A OUTDOOR FAN AMBIENT COIL COMPRESSOR GROUND CONTROL SENSOR SENSOR 300 LUG 042 om OFF on ON 048 OFF OFF ON L1 060 ON CHK HIGH S87 LOW A PRESSURE PRESSURE REVERSING CUT ON BOARD LINK TO FOR HEAT PUMP APPLICATIONS K1 SWITCH SWITCH VALVE N RT14 SENSOR OUTDOOR TEMP OPTIONAL eg A RESISTOR KIT 47W97 IS REQUIRED WHEN USING COMFORTSENSE 7000 Y0349 WITH A175 OUTDOOR CONTROL RESISTOR KIT NOT REQUIRED WHEN USING COMFORTSENSE 7000 Y2081 A175 CONTROL 2 AX CUT ON BOARD LINK FROM DS FOR DEHUMIDIFICATION ON 92 UNITARY A _NOTE FOR USE WITH COPPER CONDUCTORS METAL JUMPERS ACROSS W1 W2 AND W3 COME FROM FACTORY CAPACITOR ET ER REMOVE JUMPER FROM W1 TO W2 FOR TWO STAGE ELECTRIC HEAT AIR HANDLERS ONLY OVERCURRENT PROTECTION SIZE ja A REFER TO COMPRESSOR IN UNIT FOR COMFORTSENSE ACTUAL TERMINAL ARRANGEMENT WARNING ELECTRIC SHOCK HAZARD CAN CAUSE INJ
70. ned to unload the scrolls compressor stops pumping when the pressure ratio meets a certain value or when the suction pressure is as high as 20 psig Compressor suction pressures should never be allowed to go into a vacuum Prolonged operation at low suction pressures will result in overheating of the scrolls and permanent damage to the scroll tips drive bearings and internal seals Once the compressor can not pump down to a lower pressure due to one of the above system conditions shut off the vapor valve Turn OFF the main power to unit and use a recovery machine to recover any refrigerant left in the indoor coil and line set Perform the following task A Start the existing HCFC 22 system in the cooling mode and close the liquid line valve B Use the compressor to pump as much of the existing HCFC 22 refrigerant into the outdoor unit until the outdoor system is full high pressure switch will trip and shut the compressor off Turn the outdoor unit main power OFF and use a recovery machine to remove the remaining refriger ant from the system NOTE It may be necessary to bypass the low pressure switch if equipped to ensure complete refrigerant evacuation C When the low side system pressures reach 0 psig close the vapor line valve D Check gauges after shutdown to confirm that the valves are not allowing refrigerant to flow back into the low side of the system Figure 3 Refrigerant Recovery Procedure Page 6 506586 01 10
71. ning in the It may be necessary to replace the filter drier several times to achieve the 8 required dryness level If system dryness is not verified the compressor will fail in the future After evacuation is complete open both the liquid and vapor line service valves to release the refrigerant charge contained in outdoor unit into the system Replace the stem caps and tighten to the value listed in table 1 Check voltage supply at the disconnect switch The voltage must be within the range listed on the unit s nameplate If not do not start the equipment until you have consulted with the power company and the voltage condition has been corrected Set the thermostat for a cooling demand Turn on power to the indoor indoor unit and close the outdoor unit disconnect switch to start the unit Recheck voltage while the unit is running Power must be within range shown on the nameplate Check system for sufficient refrigerant by using the procedures listed under System Refrigerant Unit Start Up System Refrigerant A IM PORTANT This section outlines procedures for If unit is equipped with a crankcase heater it should be 1 Connecting gauge set for testing and charging see figure 19 energized 24 hours before unit start up to prevent compressor damage as a result of slugging 2 Checking and adjusting indoor airflow as described in figure 20 1 Rotate fan to check for binding 2 Insp
72. not properly charged or that a problem exists with some component in the system Nemo para sw sm fam me om sss EO ss a was me mm fm fo mu fm 60 15 5 361 129 387 128 E ECS 361 125 428 127 413 126 ooling Operation a KJE EEE EE eee ME c er sas ees rane o 26 see comen mss ze ws zo ww sw we ww zs we me v Does ke rea a Even peser ees sem Vs ger cmm num er pa pm Fs m we ss ws p x pe pow 3e pe 39 9 rs poene s canc om eec enc cc eee oes enr n punte ens EA area een een owe re EE pnus eee ES urs EE 115 46 1 These are most popular match up pressures Indoor match up indoor air quality and indoor load cause pressures to vary Temperature of the air entering the outdoor coil Table 11 HFC 410A Temperature F Pressure Psig F Psig F Psig F Psig F Psig F Psig F Psig F Psig F Psig 32 100 8 48 137 1 63 178 5 79 231 6 94 290 8 110 365 0 125 445 9 141 545 6 33 102 9 49 139 6 64 181 6 80 235 3 95 295 1 111 370 0 126 451 8 142 552 3 34 105 0 50 142 2 65 184 3 81 239 0 96 299 4 112 375 1 127 457 6 143 559 1 35 107 1 51 144 8 66 187 7 82 242 7 97 303 8 113 380 2 128 463 5 144 565 9 36 109 2 52 147 4 67 190 9 8
73. oil The rubber will then bubble and could cause leaks Protect the roof surface to avoid exposure to refrigerant and oil during service and installation Failure to follow this notice could result in damage to roof surface Removing and Installing Panels A IMPORTANT Do not allow panels to hang on unit by top tab Tab is for alignment and not designed to support weight of panel A IMPORTANT To help stabilize an outdoor unit some installations may require strapping the unit to the pad using brackets and anchors commonly available in the marketplace 4 WARNING To prevent personal injury or damage to panels unit or structure be sure to observe the following While installing or servicing this unit carefully stow all removed panels out of the way so that the panels will not cause injury to personnel nor cause damage to objects or structures nearby nor will the panels be subjected to damage e g being bent or scratched While handling or stowing the panels consider any weather conditions especially windy conditions that may cause panels to be blown around and battered Page 9 XP17 SERIES REMOVING AND INSTALLING PANELS un MD nt installing panel Panel shown slightly rotated to allow top tab to exit or enter top slot for removing or LOUVERED PANEL REMOVAL REMOVE 4 SCREWS TO Remove the louvered panels as follows REMOVE PANEL FOR ACCESSING COMPRESSOR i AND CONTROLS 1 Remo
74. ontrol Place jumper on FIELD TEST E33 pins within 2 to 4 seconds after removal The control s DS11 and DS14 LEDs will start blinking the Unit Nominal Code at three 3 second intervals starting at 1 ton through to 6 ton If a code is not selected the control will cycle one more time through the codes before defaulting back to the idle mode simultaneous slow flash Long blink ON red LED DS 14 to indicate tonnage and solid ON green LED DS11 to indicate 7 tonnage harness must be attached to air conditioner Connect R wire to control 24 volt AC power Reconnect any control wiring previously removed TERMINAL STRIP Remove R wire from air conditioner control 24 volt AC power When the required Unit Capacity Code is displaying on the LEDs remove FIELD TEST jumper from pins E33 LEDs will continue to display the dd selected unit capacity code for two 2 minutes before defaulting back to the idle mode simultaneous slow flash or until the 24 volt power is cycled to the air conditioner control DS14 Model Size Red LED 012 1 ton 1 long flash 018 1 5 ton 1 long flash 024 2 ton 2 long flashes 030 2 5 ton 2 long flashes 036 3 ton 3 long flashes 042 3 5 ton 3 long flashes 048 4 ton 4 long flashes 054 4 5 ton 4 long flashes 060 5 ton 5 long flashes 066 5 5 ton 5 long flashes 072 6 0 ton 6 long flashes Figure 36 Heat Pump Control A175 Unit Nominal Capacity
75. or motor winding resistance contactor failure Clears after one normal com pressor run cycle or power reset 6 flashes then pause Critical Alert Code 406 Open start circuit Current not sensed by Start transformer 1 Run capacitor has failed 2 Open circuit in compressor start wiring or connections e Check wiring and connectors between supply and the compressor S terminal 3 Compressor start winding is damaged e Check compressor motor winding resistance Clears when amperage is de tected in RUN and START sensors or after power reset 7 flashes then pause Critical Alert Code 407 Open run circuit Current not sensed by run transformer 1 Open circuit in compressor start wiring or connections e Check wiring and connectors between supply and the compressor R terminal 2 Compressor start winding is damaged e Check compressor motor winding resistance Clears when amperage is de tected in RUN and START sensors or after power reset 8 flashes then pause Critical Alert Code 408 Welded contactor Compressor always runs 1 Compressor contactor failed to open 2 Thermostat demand signal not connected to mod ule Clears after one normal com pressor run cycle or after power reset 9 flashes then pause Moderate Critical Alert Code 409 Secondary low voltage 24VAC is below 18VAC 1 Control circuit transformer is overloaded 2 Low
76. ort Touch Thermostat Display Moderate Critical Alert Code 400 Condition Compressor internal overload trip Possible Cause s Thermostat demand signal Y1 is present but compressor not running Solution 1 Compressor protector is open e Check for high head pressure e Check compressor supply voltage 2 Outdoor unit power disconnect is open 3 Compressor circuit breaker or fuse s is open 4 Broken wire or connector is not making contact 5 Low or high pressure switch open if present in the system 6 Compressor contactor has failed to close Clearing Status Clears the error after current is sensed in the run and start winding for two seconds ser vice removed or power reset 1 flash then pause Critical Alert Code 401 Long run time Compressor is running extremely long run cycles 1 Low refrigerant charge 2 Evaporator blower is not running e Check blower relay coil and contacts e Check blower motor capacitor e Check blower motor for failure or blockage e Check evaporator blower wiring and connec tors e Check indoor blower control e Check thermostat wiring for open circuit 3 Evaporator coil is frozen e Check for low suction pressure e Check for excessively low thermostat setting e Check evaporator airflow coil blockages or re turn air filter e Check ductwork or registers for blockage Faulty metering device e Check bulb installation size location and
77. p A minus C Determine if fan needs adjustment If the difference between the measured Tprop and the desired DT Tprop DT is within 3 no adjustment is needed See example below ASSUME DT 15 AND A TEMP 72 THESE C TEMPERATURES WOULD NECESSITATE STATED ACTIONS F ACTION Changing air flow affects all temperatures recheck temperatures to 4 INCREASE THE AIRFLOW confirm that the temperature drop and DT are within 30 WITHIN 3 RANGE NO CHANGE 5 DECREASE THE AIRFLOW 4 ADJUST THE FAN SPEED See indoor unit instructions to increase decrease fan speed Figure 20 Checking Indoor Airflow over Evaporator Coil using Delta T Chart Formula Page 28 506586 01 10 10 Use WEIGH IN method for adding initial refrigerant charge and then use SU BCOOLING method for for verifying refrigerant charge WEIGH IN CHARGING METHOD CALCULATING SYSTEM CHARGE FOR OUTDOOR UNIT VOID OF CHARGE If the system is void of refrigerant first locate and repair any leaks and then weigh in the refrigerant charge into the unit To calculate the total refriger ant charge Amount specified on Adjust amount for variation in line set Additional charge specified per indoor Total Charge nameplate length listed on line set length table below unit match ups starting on page 30 Refrigerant Charge per Line Set Length LENNOX 3 LIQUID LINE SET DIAMETER DUNDES PERS FEET GEER TE UD ADIUSEPRONCISEBET OM 3 8
78. power up after loss of power or after temperature RT21 and compressor cooling mode a sacrificial defrost will be used to ensure there run time to determine when a defrost is a clear coil before attempting calibration cycle is required NOTE No system alert codes can be active for defrost calibration to be achieved below 35 F 2 C No attempt to calibrate DEGREE wn E47 TARGET ten Heat Pump Control A175 Defrost Termination E47 Pins Factory Default is 50 F Accumulate compressor run time while outdoor coil temperature sensor input RT21 is below 35 F 2 C 70 DEGREE TARGET 6 35 minuta Continue to accumulate compressor gt run time 50 run time DEGREE TARGET Demand Mode Defrost Mode After the initial calibration the heat pump control Initiate a defrost and monitor coil temperature disables the defrost mode for 30 34 minutes in sensor input RT21 and accumulate defrost time order to avoid unnecessary defrosts Beyond this timing period both the ambient RT13 and coil RT21 sensors are continuously moni tored If the coil temperature is below 35 F 2 C and the calibration delta is reached or accumu lated compressor run time is more than six 6 hours a defrost is to be initiated How did defrost terminate Coil temperature sensor input Defrosted for 14 minutes with RT21 reached specified de out the coil temperature sensor frost termination temperature inpu
79. rant charge should be checked Outdoor Coil It may be necessary to flush the outdoor coil more frequently if it is exposed to substances which are corrosive or which block airflow across the coil e g pet urine cottonwood seeds fertilizers fluids that may contain high levels of corrosive chemicals such as salts Page 51 Figure 37 Snow Guard Top Cover X8782 XP17 SERIES HOMEOWNER Cleaning of the outdoor unit s coil should be performed by a trained service technician Contact your dealer and set up a schedule preferably twice a year but at least once a year to inspect and service your outdoor unit The following maintenance may be performed by the homeowner A IMPORTANT Sprinklers and soaker hoses should not be installed where they could cause prolonged exposure to the outdoor unit by treated water Prolonged exposure of the unit to treated water i e sprinkler systems soakers waste water etc will corrode the surface of steel and aluminum parts and diminish performance and longevity of the unit Outdoor Coil The outdoor unit must be properly maintained to ensure its proper operation e Please contact your dealer to schedule proper inspection and maintenance for your equipment e Make sure no obstructions restrict airflow to the outdoor unit e Grass clippings leaves or shrubs crowding the unit can cause the unit to work harder and use more energy e Keep shrubbery trimmed away from the uni
80. rocedures provided in this supplement B Braze suction vapor line to suction vapor service valve WHEN BRAZING LINE SET TO SERVICE VALVES POINT FLAME AWAY FROM SERVICE VALVE SUCTION VAPOR LINE SUCTION VAPOR SERVICE PORT MUST BE OPEN AND SERVICE PORT CORE REMOVED TO ALLOW EXIT POINT FOR NITROGEN FLOW WATER SATURATED CLOTHS IMPORTANT Allow braze joint to cool Apply additional water saturated cloths to help cool brazed joints Do not remove water saturated cloths until piping has cooled Temperatures above 250 F will damage valve seals LIQUID LINE WATER SATURATED CLOTHS 7 PREPARATION FOR NEXT STEP After all connections have been brazed disconnect manifold gauge set from service ports Apply additional water saturated cloths to both services valves to cool piping Once piping is cool remove all water saturated cloths Refer to the unit installation instructions for the next step in preparing the unit Figure 10 Brazing Procedures Continued Page 15 XP17 SERIES Flushing Line Set and Indoor Coil TYPICAL EXISTING FIXED ORIFICE REMOVAL PROCEDURE UNCASED OR COIL SHOWN 1A 1 TWO PIECE PATCH PLATE UNCASED COIL ONLY DISTRIBUTOR TUBES LIQUID LINE ORIFICE HOUSING TEFLON RING FIXED ORIFICE BRASS NUT DISTRIBUTOR ASSEMBLY REMOVE AND DISCARD WHITE TEFLON SEAL IF PRESENT LIQUID LINE ASSEMBLY INCLUDES STRAINER On fully cased coils remove the coil acc
81. rs Connections and LED Locations Page 23 XP17 SERIES Table 3 Heat Pump Control A175 Jumper and Terminal Descriptions Label 21 Bera gout more YOT HS PS S87 connection for high pressure switch E25 and 24VAC E24 to A177 R input lt lt Input Output RSBus data low Used in communicating mode only with compatible indoor thermostat FAN C ECM common connection for ECM fan Six position square pin header P4 provides connections for the temperature sensors DIS AMB 1 Outdoor ambient temperature sensor supply Rae AMB 2 Outdoor ambient temperature return Range is 40 F to 140 F COIL COIL 1 Outdoor coil temperature sensor supply BROWN COIL 2 Outdoor coil temperature sensor return RT21 Range is 40 F to 140 F Sensor is clipped on a 5 16 copper return bend Field Test This jumper allows service personnel to defeat the timed off control initiate or terminate a defrost and field programming of unit nominal capacity feature Two position square pin header When jumper is installed a 30 second compressor shift delay which de energizes Comp Shift the compressor contactor output second stage solenoid output if on and the ECM fan outputs After the timer Delay expires the compressor contactor and ECM fan outputs are energized If no jumper is installed it changes the reversing valve with de energizing the outputs immediately 50 Seven position square pin header E47 pro
82. s and and RPM indicator are displayed Fan motor speeds are not adjustable for a single stage outdoor unit see table 16 Verifying Correct DC Output Voltage J2 The following three methods can be used to determine whether the fan motor B4 is operating at the correct RPMs based on unit size 1 Use the information provided in table 16 to verify that all four jumper terminals are set correctly for the specific size unit 2 Verify LED RPM indicator is displaying the correct flash sequence for the applicable size unit see table 18 3 Test DC voltage output on the fan motor control s J2 terminals see figure 34 while under full load and verify the voltage read to the voltage listed in table 16 for the applicable size unit 4 If no voltage is detected at the J2 terminals verify there is a Y1 demand at the thermostat and applicable voltages detected all fan motor control A177 voltage inputs see table 21 If there is a demand proceed to the next section for further testing Verifying Correct Input Voltage ECM Y1 ECM Y2 ECM C and EXT ECM R Using a voltmeter check voltages on the following fan motor control inputs using table 21 Voltage will only be present during a thermostat demand See figure 35 for test example If correct voltages are detected at applicable inputs during a demand and no voltage is present at the J2 terminals then fan motor control should be replaced Table 21 Fan Motor Control Volt
83. set from joist or rafter use either metal strapping material or anchored heavy nylon wire ties WIRE TIE AROUND VAPOR LINE ONLY 8 FEET 2 43 METERS Nov STRAPPING MATERIAL AROUND VAPOR LINE ONLY m ME ROOF RAFTER SS TAPE OR WIRE TIE NON CORROSIVE METAL SLEEVE TAPE OR STRAP THE VAPOR LINE TO THE JOIST WIRE TIE OR RAFTER AT 8 FEET 2 43 METERS INTERVALS THEN STRAP THE LIQUID LINE TO THE VAPOR LINE FLOOR JOIST OR ROOF RAFTER REFRIGERANT LINE SET INSTALLING VERTICAL RUNS NEW CONSTRUCTION SHOWN NOTE Insulate liquid line when it is routed through areas where the surrounding ambient temperature could become higher than the temperature of the liquid line or when pressure drop is equal to or greater than 20 psig OUTSIDE WALL VAPOR LINE LIQUID LINE STRAP WOOD BLOCK NON CORROSIVE BETWEEN STUDS METAL SLEEVE WIRE TIE WOOD BLOCK WIRE TIE STRAP VAPOR LINE WRAPPED WITH ARMAFLEX OUTSIDE WALL LIQUID LINE PVC CAULK FIBERGLASS INSULATION NOTE Similar installation practices should be used if line set is to be installed on exterior of outside wall Figure 8 Line Set Installation Page 12 506586 01 10 10 Brazing Connections Use the procedures outline in figures 9 and 10 for brazing A IMPORTANT line set connections to service valves AWARNING Danger of fire Bleeding the refrigerant charge from only the high side may result f in pressuri
84. supplied to the unit e Measuring amperage being drawn by the heat unit s with HCFC 22 Then apply the measurements taken in following formula COOLING MODE INDOOR AIRFLOW CHECK to determine CFM Check airflow using the Delta T DT process using the Amps x Volts x 3 41 illustration in figure 20 CFM 1 Te i F HEATING MODE INDOOR AIRFLOW CHECK eee Blower airflow CFM may be calculated by energizing electric heat and measuring AIRE LOW voor con TEMPERATURE OF AIR ENTERING INDOOR COIL F 80 24 24 24 23 23 22 22 22 20 19 18 17 16 15 78 2323 23 22 22 21 21 20 19 18 17 16 15 14 76 22 22 22 2121 20 19 19 18 17 16 15 14 13 74 21 21 21 20 19 19 18 17 16 16 15 14 13 12 A 72 2020 19 18 17 17 16 5415 14 13 12 11 10 70 19 19 18 18 17 17 16 15 15 14 13 12 11 10 WET BULB F 57 58 59 60 61 62 63 64 65 66 67 68 69 70 DRY BULB All temperatures are expressed in F INDOOR COIL DRY BULB Q WET BULB Use the following procedure to adjust for optimal air flow across the indoor coil DETERMINE THE DESIRED DT MEASURE ENTERING AIR TEMPERATURE USING DRY BULB A AND WET BULB B DT IS THE INTERSECTING VALUE OF AAND B IN THE TABLE SEE TRIANGLE Find temperature drop across coil Measure the coil s dry bulb entering and leaving air temperatures A and C Temperature Drop Formula Tpro
85. t RT21 reaching defrost as set on heat pump control termination temperature as set E47 pins on heat pump control E47 pins Calibration Attempted Unit Running in Heat Mode Calibration Figure 26 Defrost Calibration Sequence of Operations Page 34 506586 01 10 10 MULTI FUNCTION TEST PINS E33 Placing the jumper on the field test pins E33 using a specific sequence allows the technician to Clear short cycle lockout Clear five strike fault lockout Cycle the unit in and out of defrost mode Manually place the unit in defrost mode to clear the coil When Y1 is energized and 24V power is being applied to the heat pump control A175 a test cycle can be initiated by placing a jumper on the heat pump control s TEST pins for 2 to 5 seconds If the jumper remains on the TEST pins E33 for longer than five seconds the heat pump control will ignore the jumpered TEST pins and revert to normal operation The heat pump control will initiate one test event each time a jumper is placed on the TEST pins For each TEST the jumper must be removed for at least one second and then reapplied Y1 Active Y Y Place a jumper on TEST pins for longer than one second but less than two seconds Place a jumper on TEST pins for more than two seconds Y Clears any short cycle lockout and five strike fault lockout function if applicable Clears any short cycle lockout and five strike fault lo
86. t _ R 410A Unit Type 230 208 230V 1ph 60hz P Heat Pump Outdoor Unit Nominal Cooling Capacity 024 2 tons 030 2 5 tons 036 3 tons 042 3 5 tons 048 4 tons 060 5 tons Series Page 2 506586 01 10 10 Typical Unit Parts Arrangement OUTDOOR AMBIENT TEMPERATURE SENSOR RT13 REVERSING VALVE REVERSING VALVE SOLENOID L1 VAPOR VALVE AND GAUGE PORT TRUE SUCTION LINE PORT LIQUID VALVE AND GAUGE PORT LIQUID LINE BI FLOW FILTER DRIER FYR DISCHARGE SECOND GROUND LUG FOR SOURCESOURCE GROUND LUG CONTACTOR 1POLE K1 1 HIGH VOLTAGE FIELD CONNECTIONS FAN MOTOR CONTROL A177 HEAT PUMP CONTROL A175 LINE MUFFLER COMPRESSOR MODELS 048 TRUE AND 060 SUCTION 24 TUBES UP LINE CHECK EXPANSION VALVE HR1 CRANKCASE HEATER CRANKCASE HEATER THERMOSTAT LOW PRESSURE SWITCH S87 S40 HIGH PRESSURE SWITCH 84 Figure 1 Typical Parts Arrangement Page 3 CAPACITOR C12 RT21 MODELS 024 030 036 AND 042 12 TUBES UP XP17 SERIES 4 WARNING Improper installation adjustment alteration service or maintenance can cause personal injury loss of life or damage to property
87. t and periodically check for debris which collects around the unit Routine Maintenance In order to ensure peak performance your system must be properly maintained Clogged filters and blocked airflow prevent your unit from operating at its most efficient level 1 Air Filter Ask your Lennox dealer to show you where your indoor unit s filter is located It will be either at the indoor unit installed internal or external to the cabinet or behind a return air grille in the wall or ceiling Check the filter monthly and clean or replace it as needed 2 Disposable Filter Disposable filters should be replaced with a filter of the same type and size NOTE If you are unsure about the filter required for your system call your Lennox dealer for assistance 3 Reusable Filter Many indoor units are equipped with reusable foam filters Clean foam filters with a mild soap and water solution rinse thoroughly allow filter to dry completely before returning it to the unit or grille NOTE The filter and all access panels must be in place any time the unit is in operation 4 Lennox Branded Air Filters are designed to remove airborne particles from the air passing through the filter 5 Indoor Unit The indoor unit s evaporator coil is equipped with a drain pan to collect condensate formed as your system removes humidity from the inside air Have your dealer show you the location of the drain line and how to
88. t steps 5 through 6 to verify charge Disconnect gauge set and re install both the liquid and suction service valve caps Figure 22 Using HFC 410A Subcooling Method High Stage High Capacity Page 29 XP17 SERIES Air Handler Coil Match ups and Targeted Subcooling Values Listed below are the targeted subcooling and charging values for approved indoor unit air handler coil match ups This information is also listed on the unit charging sticker located on the access panel Indicates amount of charge required in additional to charge shown on unit nameplate Remember to consider line set length differences Table 4 XP17 024 Table 7 XP17 042 Target Add Target Add INDOOR MATCHUPS INDOOR MATCHUPS Fupeooling charge 45 F ef Ib gt oz CBX27UH 024 16 3 1 6 CBX27UH 042 048 12 4 TT 0 CBX27UH 030 16 5 1 9 CBX32M 048 12 4 1 0 CBX32M 030 16 3 1 6 CBX32MV 048 12 4 1 0 CBX32M 036 16 5 1 9 CBX40UHV 042 048 12 4 1 0 CBX32MV 024 030 16 3 1 6 CH23 51 17 7 0 0 CBX32MV 036 16 5 1 9 CH33 43 14 4 0 0 CBX4
89. ted icomfort Touch Thermostat Alert Codes System fault and lockout LED DS11 DS14 alarm codes takes precedence over system status LED codes cooling heating stages or defrost dehumidification Only the latest active LED fault or lockout alarm code if present will be displayed If no fault or lockout codes are active then System status LEDs are routinely displayed See notes 1 and 2 in table below for duration of fast slow flashes and pause Heat Pump Control icomfort LEDs Touch Condition Possible Cause s Solution DS11 Sen Thermostat Green Display SYSTEM STATUS 1 No power 24V to heat pump control terminal s 1 Not R and C or heat pump Check control transformer power 24V Off Off applicable Power problem control failure 2 If power is available to control and LED s do not light replace the heat pump control 2 Heat pump control failure Simultaneous slow flash Sine Normal operation Unit operating normally or in standby mode 5 minute Initial power up safety trip Alternating slow flash anti short cycle end of room thermostat de None required Jumper TEST E33 pins to applicable override delay mand Moderate Simultaneous fast Critical Alert Ambient sensor If sensor detects an open shorted or out of temperature range heat pump control flashes Code 180 problem will revert to time temperature defrost operation System will still heat or cool Alt t
90. teenered dean did 30 Operating and Temperature Pressures 31 System Operations 32 Defrost System 32 System Status Fault and Lockout LED Codes 40 Field Configuration and Testing 45 Maintenance Dealer and Homeowner 51 SunSource Home Energy System 53 Start Up and Performance Checklist 54 This outdoor unit is designed for use with HFC 410A refrigerant only This unit must be installed with an approved indoor air handler or coil See the Lennox XP17 Engineering Handbook for approved indoor component matchups 506586 01 Unit Dimensions Inches mm 39 1 2 DISCHARGE AIR ELECTRICAL INLETS 35 1 2 37 940 024 THRU 042 47 1194 048 AND 060 VAPOR LINE INLET LIQUID LINE INLET 1 25 SIDE VIEW ACCESS VIEW UNIT SUPPORT FEET x 16 7 8 429 26 7 8 683 8 3 4 EY 3 3 4 95 4 5 8 117 BASE WITH ELONGATED LEGS Model Number Identification 17 036 230 2 Refrigerant Type Minor Revision Number g
91. the top of the slab should be high enough above grade so that water from higher ground will not collect around the unit The slab should have a slope tolerance as described in figure 5 detail B NOTE If necessary for stability anchor unit to slab as described in figure 5 detail D ELEVATING THE UNIT Units are outfitted with elongated support feet as illustrated in figure 5 detail C If additional elevation is necessary raise the unit by extending the height of the unit support feet This may be achieved by using a 2 inch 50 8mm Schedule 40 female threaded adapter The specified coupling will fit snuggly into the recessed portion of the feet Use additional 2 inch 50 8mm Schedule 40 male threaded adaptors which can be threaded into the female threaded adaptors to make additional adjustments to the level of the unit NOTE Keep the height of extenders short enough to ensure a Sturdy installation If it is necessary to extend further consider a different type of field fabricated framework that is sturdy enough for greater heights Page 7 XP17 SERIES DETAIL A outside Unit Placement Install unit away from windows DETAIL B stab Mounting at Ground Level Install unit level or if on a slope maintain slope tolerance of two 2 degrees or two inches per five feet 50 mm per 1 5 m away from building structure TWO 90 ELBOWS INSTALLED IN LINE SET WILL REDUCE LINE SET VIBRATION DETAIL C
92. ve two screws allowing the panel to swing open slightly 2 Hold the panel firmly throughout this procedure Rotate bottom corner of panel away from hinged corner post until lower three tabs clear the slots as illustrated in detail B Position panel with holes aligned install screws and tighten 3 Move panel down until lip of upper tab clears the top slot in corner post as illustrated in detail A Detail A LOUVERED PANEL INSTALLATION Position the panel almost parallel with the unit as illustrated in detail D with the screw side as close to the unit as possible Then in a continuous motion 1 zn LIP Slightly rotate and guide the lip of top tab inward as illustrated in detail A and C then upward into the top slot of the hinge corner post 2 Rotate panel to vertical to fully engage all tabs Holding the panel s hinged side firmly in place close the right hand side of the panel aligning the screw holes SARNNNNAR FA Y Y NM ANM AA When panel is correctly positioned and aligned insert the screws and tighten SAANNNN LDL Detail C CY Y Maintain minimum panel angle as close to parallel with the unit as possible while installing panel LY L L ee DY Detail UL M LI
93. vides selection of the defrost terminate temperature based on the posi E47 70 tion of the selection jumper The defrost termination temperature is measured by the defrost coil sensor The jumper 90 termination pin is factory set at 50 F 10 C If the temperature jumper is not installed the default termination tem perature is 90 F 32 C In addition it provides selection points for enabling the field test mode 100 Short DS To R Cut for Humiditrol EDA application Use only in two stage units Factory default setting Page 24 506586 01 10 10 Field Control Wiring Air Hander Control ComfortSense amp 7000 Thermostats One Stage Catalog Y0349 or Y2081 Heat Pump Control On board link 8 1 Low voltage thermostat wiring Flat metal jumper amp 9 C T 1 1 8989 66 gt AA CR e Gn v2 e Cr O CRY gt w2 WE 09 9 000 6 00099009 Thermostat T terminals are used for outdoor sensor input Use for thermostat s outdoor temperature display optional R to L connection is required for this model when using the ComfortSense 7000 catalog number Y0349 only Resistor Kit catalog number 47W97 required and ordered separately Air handler control ships from factory with metal jumpers instal
94. zation of the low side shell and 9 suction tubing Application of a brazing torch to a pressurized system may result in ignition of the refrigerant and oil mixture Check the high and low pressures before applying heat A WARNING When using a high pressure gas such as dry nitrogen to pressurize a refrigeration or air conditioning system use a regulator that can control the pressure down to 1 or 2 psig 6 9 to 13 8 kPa CAUTION Brazing alloys and flux contain materials which are hazardous to your health Avoid breathing vapors or fumes from brazing operations Perform operations only in well ventilated areas Wear gloves and protective goggles or face shield to protect against burns Wash hands with soap and water after handling brazing alloys and flux Connect gauge set low pressure side to vapor line service valve and repeat procedure starting at paragraph 4 for brazing the liquid line to service port valve A IMPORTANT Allow braze joint to cool before removing the wet rag from the service valve Temperatures above 250 F can damage valve seals A IMPORTANT Use silver alloy brazing rods with 5 minimum silver alloy for copper to copper brazing Use 45 minimum alloy for copper to brass and copper to steel brazing WARNING Fire Explosion and Personal Safety Hazard Failure to follow this warning could result in damage personal injury or death Never use oxygen to pressurize or purge refr

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