Lennox International Inc. 15CHAX User's Manual
Contents
1. DATA OUTPUT DATA OUTPUT Y CONNECTOR gt 25 SPADE 5 5 ALERT LED TRIP LED Figure 9 A IMPORTANT This monitor does provide safety protection The monitor is a monitoring device only and cannot con trol or shut down other devices LSOM LED Functions Power LED green Voltage within the range of 19 28 is present at the system monitor power connec tion Alert LED yellow Communicates an abnormal system condition through a unique flash code The alert LED flashes a number of times consecutively then pauses then repeats the process This consecutive flashing corre sponds with a particular abnormal condition Trip LED red Indicates a demand signal from the ther mostat but detects no current to the compressor Flash code number Corresponds to a number of LED flashes followed by a pause and then repeated Trip amp Alert LEDs flashing simultaneously Indicates that the control circuit voltage is too low for operation Reset ALERT flash code by removing 24VAC power from monitor Last ALERT flash code will display for 1 minute af ter monitor is powered on LSOM codes are given in table 5 Page 11 Table 5 System Operation Monitor LED Troubleshooting Codes Status LED Condition Green Power LED ON Status LED Description Module has power Status LED Troubleshoot2. The variable speed motor slowly ramps up to and down from the selected air flow during both cooling and heating demand This minimizes noise and eliminates the initial blast of air when the blower is initially energized ADJUST The ADJUST pins allow the motor to run at normal speed approximately 15 percent higher or approximately 15 per cent lower than normal speed Tables 2 3 and 4 give three rows NORMAL and with their respective CFM vol umes Notice that the normal adjustment setting for cool speed position D in table 2 is 900 CFM The adjustment setting for that position is 1035 CFM and for the adjust ment setting is 765 CFM After the adjustment setting has been determined choose the remaining speed settings from those offered in the table in that row The TEST pin is available to bypass the blower control and run the motor at approximately 70 percent to make sure that the motor is operational This is used mainly in trouble shooting The G terminal must be energized for the motor to run BLOWER CONTROL BOARD A54 DIAGNOSTIC LED 908 o w ed kei Fr pl opt ADJUST SELECTOR PINS Setting affects both heating and cooling modes HEATING SPEED SELECTOR PINS COOLING SPEED SELECTOR PINS D DEHUMIDIFY CUT TO ENABLE Figure 8 Page 9 COOL The COOL jumper is used to determine the CFM during cooling operation This jumper selection is activated for cooling when Y1 is e
3. 434018 335 05 08 WO we 4350 31 HOLIMS HOLIMS YOLOVLNOD 39155359 MOT 3unss3ud H9IH U3N303SNVUL YOLIVLNOD 81055384802 5 4 9 4 334018 800481 1 19 ANO IM 330 NOI12NQ3 3180 320V 8 MNO BSL G 1300M MNOZ S NO 18055322 1 21812313 39 15 01 0350 38 NVI ZM Y IM 753002 1 201 1VNOILVN HLIM 3818 2 61 AINO JINVGYOIOV NI 03080049 38 LSAW YOLINGNOD 834402 ISN LINN 08 N20HS 21812313 1350 38 1508 ONINUVM 3UIM 3dAL 3215 IWS 3HL 032V1d3U SI 3UIM TWNIOISO JHL 30 ANV 31 Q3TiV1SNI 01313 39V110A 3NI1 13108 18 03345 830018 jedIdAL SHUN 932153 seules XVHOSI 7 igure Page 8 F Blower Control Board A54 Electric shock hazard Can cause injury or death Before attempting to perform any service or maintenance turn the electrical power to unit OFF at disconnect switch es Unit may have multiple power 15CHAX units are equipped with a variable speed motor that is capable of maintaining a specified CFM throughout the external static range A particular CFM can be obtained by positioning jumpers COOL HEAT and ADJUST on the blower control board The HEAT and COOL jumpers are labeled A B C and D Each of the numbers corre sponds with an air volume CFM setting The ADJUST jumper is labeled Test and Norm The and pin set tings are used to add or subtract a percentage of the
4. Figure 2 NOTE Do not permit overhanging structures or shrubs to obstruct condenser air discharge outlet In the U S units may be installed on combustible floors made from wood or class A B or C roof covering material In Canada units may be installed on combustible floors Page 4 Existing Common Vent Systems The 15CHAX packaged cooling units with auxiliary electric heat may replace an existing furnace which is being re moved from a venting system commonly run with separate gas appliances In this case the existing vent system is likely to be too large to properly vent the remaining at tached appliances Conduct the following test while each appliance is operat ing and the other appliances which are not operating re main connected to the common venting system If the vent ing system has been installed improperly you must correct the system as indicated in the general venting re quirements section 1 Seal any unused openings in the common venting sys tem 2 Inspect the venting system for proper size and horizon tal pitch Determine that there is no blockage restric tion leakage corrosion or other deficiencies which could cause an unsafe condition 3 Close all building doors and windows and all doors be tween the space in which the appliances remaining connected to the common venting system are located and other spaces of the building Turn on clothes dry ers and any appliances not connected to the comm
5. 1200 565 1000 470 1000 470 600 285 500 235 400 190 550 260 1020 480 850 400 680 320 935 440 1200 565 1200 565 1000 470 1000 470 510 240 425 200 350 165 470 220 Table 4 15CHAX 42 15 48 15 60 Blower Performance 0 through 0 80 in w g 0 through 200 Pa External Static Pressure Range COOL Speed Setting cfm L s L s L s L s L s 2070 975 1840 870 1610 760 1380 650 1610 760 1800 850 1600 755 1400 660 1200 565 1400 660 1530 720 1360 640 1190 560 1020 480 1400 660 Jumper Speed Positions HEAT Speed cfm L s cfm L s L s L s 1610 760 1610 760 1610 760 1035 490 1400 660 1400 660 1400 660 900 425 1400 660 1400 660 1400 660 765 360 CONTINOUS Speed B cfm L s 920 435 cfm L s cfm L s 805 380 690 325 800 380 700 330 600 285 680 320 595 280 510 240 10 System Operation Monitor LSOM The system operation monitor A132 detects the most common fault conditions in the air conditioning system When an abnormal condition is detected the module com municates the specific condition through its ALERT and TRIP lights The module is capable of detecting both me chanical and electrical system problems See figure 9 for the system operation monitor System Operation Monitor A132 POWER LED
6. CFM selected The Test jumper is used to operate the motor in the test mode See figure 8 Factory settings for the blower speed jumpers are given in the wiring diagram in figure 7 Figure 8 shows the blower control board Use tables 2 3 and 4 to determine the cor rect air volume for operation in heat and cool mode The CFM LED located on the blower control board flashes one time per 100 cfm to indicate selected blower speed For example if the unit is operating at 1000 CFM CFM LED will flash 10 times If the CFM is 1150 CFM LED will flash 11 full times plus one fast or half flash At times the light may appear to flicker or glow This takes place when the control is communicating with the motor be tween cycles This is normal operation Read through the jumper settings section before adjusting the jumper to obtain the appropriate blower speed To change jumper positions gently pull the jumper off the pins and place it on the desired set of pins The following section outlines the different jumper selections available and conditions associated with each one Refer to figure 8 After the CFM for each application has been determined the jumper settings must be adjusted to reflect those given in tables 2 3 and 4 From the tables determine which row most closely matches the desired CFM Once a specific row has been chosen NORMAL or CFM volumes from other rows cannot be used Below are descriptions of the jumper selections
7. the last carrier WARNING Improper installation adjustment alteration service maintenance cause property damage person al injury or loss of life Installation and service must be performed by a licensed professional installer or equivalent or service agency A WARNING If this unit is to be installed in a mobile or manufac tured home application the duct system must be sized to achieve static pressures within the manufacturer s guidelines All other installation guidelines must also be followed Failure to do so may result in equipment damage personal injury and improper unit performance ACAUTION Danger of sharp metallic edges Can cause injury Take care when servicing unit to avoid accidental contact with sharp edges AWARNING Electric shock hazard Can cause injury or death Before attempting to perform any service or maintenance turn the electrical power to unit OFF at disconnect switch es Unit may have multiple power supplies i 505 201M 15CHAX Unit Dimensions inches 2 1 2 2 1 2 64 64 BB 2 3 4 DOWN FLOW 70 SUPPLY AIR OPENING e RETURN AIR ur C E E T VIEW A FRONT VIEW Center Corner Weights Model 9 Gravity Number AA BB cc DD EE FF 7 15 24 75 94 117 94 16 29 15 30 75 94 117 94 16 29 15
8. unit and connect as shown in the wiring diagram located on the inside of the control access panel Refer to figure 5 for electrical access Electrical Access Thermostat gt Entry Line Voltage Entry Figure 5 Page 6 Unit must be electrically grounded in accordance with local codes or in the absence of local codes with the National Electric Code ANSI NFPA No 70 latest edition or CSA C22 2 Part 1 latest edition Power supply to the unit must comply with all applicable codes and NEC or CEC A fused disconnect switch should be field provided for the unit The switch must be separate from all other circuits If any of the wire supplied with the unit must be replaced replacement wire must be of the type shown on the wiring diagram Electrical wiring must be sized to carry minimum circuit ampacity marked on the unit USE COPPER CONDUCTORS ONLY Each unit must be wired with a separate branch circuit and be properly fused WARNING Unit equipped with single pole contactor Line voltage is present at all components when unit is not in operation Disconnect all remote electric power supplies before opening access panel Unit may have multiple power supplies Failure to disconnect all power supplies could result in personal injury or death A CAUTION When connecting electrical power and control wir ing to the unit waterproof type connectors MUST be used so that water or moisture cannot be drawn into the
9. unit during normal operation A WARNING Unit must be grounded in accordance with national and local codes Failure to ground unit properly can result in personal injury or death See figure 6 for typical field wiring connections and figure 7 for typical unit wiring diagram Optional Electric Heat Optional electric heat is available and must be purchased separately Install the electric heat section as outlined in the installation instructions packaged with the electric heat section Thermostat The room thermostat should be located on an inside wall where it will not be subject to drafts sun exposure or heat from electrical fixtures or appliances Follow manufacturer s instructions enclosed with thermostat for general installation procedure Color coded insulated wires 18 AWG should be used to connect thermostat to unit Typical Single Phase Unit Wiring Connections ECONOMZER NOT INSTALLED KA CAUTION Do miconnaci E when required by fie indoor hemostal Rieter b he fhemmcetal instal non POWER WING 208 230 1 60 por CMN wing POWER WRING 24v CONTROL WIRING NEC CLASS A W1 W2 CAN USED TO STAGE ELECTRIC HEAT ACCESSORY ON 15 20 amp 26 KW MODELS amp amp 10 HEATER ACCESSORY FUNCTION OFF Wi ONLY Figure 6 Page 7 YOLOVLNOD 5055354002 H HE 9 1V38 Asnray YOLOW NVI 835830802 JINON JILSONSVIG Wc LYVHD 43345 09 1 A0 2 802
10. 36 83 97 121 104 16 30 15XHAX 42 110 138 163 129 21 33 15CHAX 48 114 139 164 134 21 33 5 15CHAX 60 119 145 171 140 21 33 5 EE HORIZONTAL RETURN OPENING AIR OPENINGS 2 BACK VIEW ELECTRICAL INLET 2 1 2 64 CONDENSATE DRAIN END VIEW END VIEW Model No d in mm in mm in mm in mm in mm in mm 15CHAX 24 15CHAX 30 34 1 4 870 65 3 8 1661 36 1 2 927 11 1 4 286 17 1 4 438 20 508 15CHAX 36 15CHAX 42 15CHAX 48 559 15CHAX 60 Model No mm 15CHAX 24 15CHAX 30 483 15CHAX 36 15CHAX 42 15CHAX 48 413 15CHAX 60 Parts Arrangement EVAPORATOR COIL ELECTRI HEATING SECTION These installation instructions are intended as a general guide only for use by an experienced licensed contractor or equivalent The 15CHAX units are single package electric units designed for outdoor installation on a rooftop or a slab The units are equipped with a transformer and blower control for applications which do not include electric heat Electric heat sections are available for separate order The unit must be sized based on heat loss and heat gain calculations made according to the methods of the Air Conditioning Contractors of America ACCA The units are shipped assembled All pipi
11. LENNOX 2006 Lennox Industries Inc Dallas Texas USA RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE Table of Contents Shipping amp Packing 1 Unit Dimensions 2 Parts Arrangement 3 General 3 5 3 Location Selection 4 Rigging amp Setting Unit 4 Clearances 4 Existing Common Vent Systems 5 Condensate Drain 5 6 Supply amp Return Connections 6 Compressors 6 este 6 Blower Control Board 9 System Operation Monitor 11 Unit Start Up and Operation 13 Condenser Fan 14 Maintenance 14 01 08 INSTALLATION INSTRUCTIONS 15CHAX SERIES UNITS Litho U S A PACKAGED ELECTRIC UNIT 2 5 TONS 505 201M 38152A082 01 08 Supersedes 05 06 Shipping amp Packing List 1 Assembled packaged electric unit As soon as the unit is received it should be inspected for possible damage during transit If you find any damage im mediately contact
12. by 25 percent when humidity levels are high An LED D1 lights when the blower is operating in the dehumidifi cation mode Table 2 15CHAX 24 15CHAX 30 Blower Performance 0 through 0 80 in w g 0 through 200 Pa External Static Pressure Range Jumper Speed Positions JUST COOL Speed Jumper A B D A HEAT Speed CONTINOUS FAN Speed Setting cfm L s L s L s L s L s L s cfm L s L s L s L s 1150 545 920 435 690 325 1035 490 1150 545 1150 545 1150 545 1150 545 575 270 460 215 345 165 520 245 1000 470 800 380 600 285 900 425 1000 470 1000 470 1000 470 1000 470 500 235 400 190 300 140 450 210 850 400 680 320 510 240 765 360 1000 470 1000 470 1000 470 1000 470 425 200 340 160 300 140 385 180 Table 3 15CHAX 36 Blower Performance 0 through 0 80 in w g 0 through 200 Pa External Static Pressure Range AD JUST Jumper COOL Speed A B D A Jumper Speed Positions HEAT Speed CONTINOUS FAN Speed D A B D Setting cfm L s cfm L s L s L s 1 5 cfm L s L s L s L s L s L s L s T 1380 650 1150 545 920 435 1265 575 1380 650 1380 650 1150 545 1150 545 690 325 575 270 460 215 635 300 1200 565 1000 470 800 380 1100 520 1200 565
13. ean permanent type as necessary DO NOT replace per manent type with disposable Motors Indoor outdoor fan and vent motors are permanently lubricated and require no further lubrication Motors should be cleaned yearly to prevent the accumulation of dust and dirt on the windings or motor exterior Coil Dirt and debris should not be allowed to accumulate on the coil surfaces or other parts in the air conditioning circuit Cleaning should be performed as often as necessary Use a brush vacuum cleaner attachment or other suitable means If water is used to clean the coil be sure the power to unit is shut off prior to cleaning NOTE Care should be used when cleaning the coil so that the coil fins are not damaged Do not permit the hot condenser air discharge to be ob structed by overhanging structures or shrubs Accessories LENNOX Cat Number Filter Kit 2 ton to 3 ton capacity units 92M54 PCO20 28 X8787 TS z iis Filter Kit 3 1 2 ton to 5 ton capacity units 92M55 Installation Hardware Kit for PCO20 28 Y 0629 Page 14
14. ide duct flanges unit insert screws through duct flanges only Do not insert screws through casing Outdoor duct must be insulated and waterproofed The 15CHAX unit is shipped ready for horizontal air discharge side duct connections If bottom air discharge is desired the covers must be removed from the supply and return air openings on the bottom of the unit and re installed to cover the side openings Removing Supply and Return Air Opening Covers 1 Remove screw and lift 2 Slide cover to free back pin Figure 4 The upper return air opening cover must be removed when the PureAir air purification system 20 28 is being used In PCO applications both upper and lower return air openings must be covered by the return air plenum to ensure proper PCO operation The upper return air opening is not required in horizontal applications when the PCO is not used Compressors Units are shipped with the compressor mountings factory adjusted and ready for operation A CAUTION Do not loosen compressor mounting bolts All wiring should be done in accordance with the current National Electric Code ANSI NFPA No 70 in the United States In Canada wiring must be done in accordance with the current CSA 22 2 Part 1 Local codes may take precedence Use wiring with a temperature limitation of 75 C min run the 208 or 230 volt 60 hertz electric power supply through a fused disconnect switch to control box of
15. ing Information 24VAC control power is present at the module terminal Green Power LED Module not powering up Determine verify that both R and C module terminals are connected and voltage is present at both terminals O Red Trip LED ON System and compressor check out OK Thermostat demand signal Y1 is present but compres sor not running 1 Verify Y terminal is connected to 24VAC at contactor coil 2 Verify voltage at contactor coil falls below 0 5VAC when off 3 Verify 24VAC is present across Y and C when thermostat demand signal is present if not present R and C wires are reversed Compressor protector is open Outdoor unit power disconnect is open Compressor circuit breaker or fuse s is open Broken wire or connector is not making contact Low pressure switch open if present in the system Compressor contactor has failed to close Red Trip amp Yellow Alert LEDs Flashing Simultaneous flashing Indicates that the control circuit voltage is too low for operation Yellow Alert Flash Code 1 Long Run Time Compressor is running extremely long run cycles Low refrigerant charge Evaporator blower is not running Evaporator coil is frozen Faulty metering device Condenser coil is dirty Liquid line restriction filter drier blocked if present Thermostat is malfunctioning Yellow Alert Flash Code 2 System Pressure Trip Discharge or suction pres sure o
16. must conform to local codes Use a sealing compound on male pipe threads The drain line must be properly trapped and routed to a suitable drain See figure 3 for proper drain arrangement The drain line must pitch to an open drain or pump a minimum of 1 inch per 10 feet to prevent clogging of the line Seal around drain connection with suitable material to prevent air leakage into return air system NOTE Drain line connection may not carry the weight of the unsupported drain line Support the drain line if necessary Drain piping should not be smaller than drain connection at coil An open vent in drain line will some times be required due to line length friction and static pressure Drains should be constructed in a manner to facilitate future clean ing NOTE The condensate drain line MUST be trapped to provide proper drainage A CAUTION Condensate line connection must be hand tight ened Do use tools Typical Condensate Drain Drain Connection 1 00 Min 2 mv Max Positive Liquid Seal Required Figure 3 Page 5 Filters are not factory supplied with the unit however optional internally installed filter kits are available Filter kit 92 54 is used with 2 2 1 2 and 3 ton units Filter kit 92M55 is used with 3 1 2 4 and 5 ton units The filter kits accommodate the use of 1 2 or 4 filters If the optional filter kit is not used a filter must be field installed Filters must al
17. nergized The blower motor runs at 80 percent of the selected air flow for the first 7 1 2 minutes of each cooling demand This fea ture allows for greater humidity removal and saves energy In the cooling mode the blower control board delays blower operation for 5 seconds after the compressor starts The blower continues to operate for 90 seconds after the compressor is de energized HEAT The HEAT jumper is used to determine CFM during back up electric heat operation only These jumper selections are activated only when W is energized In the backup heat mode the blower continues to operate for 2 minutes after the heating demand is satisfied NOTE Due to the nature of electric heat CFM settings are limited CONTINUOUS FAN When the thermostat is set for Continuous Fan operation and there is no demand for heating or cooling the blower control will provide 50 percent of the COOL CFM selected NOTE With the proper thermostat and subbase continu ous blower operation is possible by closing the R to G cir cuit Cooling blower delay is also functional in this mode DEHUMIDIFICATION The blower control board includes an HUM terminal which provides for connection of a humidistat The JV1 resistor on the blower control board must be cut to activate the HUM terminal The humidistat must be wired to open on humidity rise When the dehumidification circuit is used the variable speed motor will reduce the selected air flow rate
18. ng refrigerant charge and electrical wiring are factory installed and tested The units require electric power condensate drain and duct connections at the point of installation Use of this unit as a construction heater or air conditioner is not recommended during any phase of construction Very low return air temperatures harmful vapors and operation of the unit with clogged or misplaced filters will damage the unit If this unit has been used for heating or cooling of buildings or structures under construction the following conditions must be met or the warranty will be void A room thermostat must control the unit The use of fixed jumpers that will provide continuous heating or cooling is not allowed ONDENSER COIL A pre filter must be installed at the entry to the return air duct The return air duct must be provided and sealed to the unit Return air temperature range between 55 F 13 C and 80 F 27 C must be maintained Air filters must be replaced and pre filter must be re moved upon construction completion The unit components duct system air filters and evap orator coil must be thoroughly cleaned following final construction clean up The unit operating conditions including airflow cool ing operation and heating operation must be verified according to these installation instructions These units must be installed in accordance with all applicable national and local safe
19. nit Model No 82 F 80 F IDDB l67FIDWB F IDWB 45CHAX24 24 15CHAX 30 15CHAX 42 10 15CHAX 48 15CHAX 60 Verify system performance using table 7 as a general guide Table 7 should not be used for charging unit Minor variations in these pressures may be expected due to dif ferences in installations Significant differences could mean that the system is not properly charged or that a prob lem exists with some component in the system Used carefully this table could serve as a useful service guide Data is based on 80 F dry bulb 67 F wet bulb return air Allow unit operation to stabilize before taking pressure readings Table 7 Normal Operating Pressures 80 F db 7 67 F wb RETURN AIR nn pressure es e ez so ee soo vos 55 15CHAX 30 30 EM 36 SERE 42 SEED 48 60 15 48 15 60 Suction Page 13 Condenser Fan Clearances The top of the condenser fan should be 1 1 2 inches from the bottom of the top grille This dimension should be checked and the fan should be adjusted accordingly any time servicing of the outdoor fan system is required Maintenance At the start of each cooling season this equipment should be serviced by a licensed professional technician or equivalent Periodic inspection and maintenance normally consists of changing or cleaning filters Filters Not supplied Inspect once a month Replace disposable or cl
20. on venting system Turn on any exhaust fans such as range hoods and bathroom exhausts so they will oper ate at maximum speed Do not operate a summer ex haust fan Close fireplace dampers Follow the lighting instructions Turn on the appliance that is being inspected Adjust the thermostat so that the appliance operates continuously 5 After the main burner has operated for 5 minutes test for leaks of flue gases at the draft hood relief opening Use the flame of a match or candle or smoke from a cigarette cigar or pipe 6 After determining that each appliance connected to the common venting system is venting properly step 3 return all doors windows exhaust fans fireplace dampers and any other gas burning appliances to their previous mode of operation 7 f a venting problem is found during any of the preced ing tests the common venting system must be modi fied to correct the problem 1 Resize the common venting system to the minimum vent pipe size determined by using the appropriate tables in Appendix G These are in the current stan dards of the National Fuel Gas Code ANSI Z223 1 NFPA 54 in the USA and the appropri ate Category 1 Natural Gas and Propane appliances venting sizing tables in the current standards of the CSA B149 Natural Gas and Propane Installation Codes in Canada Condensate Drain The 15CHAX unit is equipped with a 3 4 inch FPT coupling for condensate line connection Plumbing
21. oncrete slab with a minimum thick ness of 4 inches The length and width should be at least 6 inches greater than the unit base Do not tie the slab to the building foundation 4 Maintain level within a tolerance of 1 4 inch maximum across the entire length or width of the unit Exercise care when moving the unit Do not remove any packaging until the unit is near the place of installation An optional lifting lug kit 92M51 may be purchased separately for use in rigging the unit for lifting Spreaders MUST be used across the top of the unit Recommended spreader length 2 2 1 2 3 ton units 44 3 1 2 4 5 ton units 54 CAUTION Before lifting a unit make sure that the weight is dis tributed equally on the cables so that it will lift even ly Units may also be moved or lifted with a forklift while still in the factory supplied packaging NOTE Length of forks must be a minimum of 42 inches Accessory Lift Kit Lifting Bracket Accessory Sheet Metal Screw Figure 1 Clearances All units require certain clearances for proper operation and service Refer to figure 2 for the clearances required for combustible construction servicing and proper unit operation Service Clearances 48 1219 Rear clearance is 18 457 when required for accessory maintenance NOTE Top Clearance 36 in 914 mm NOTE Entire perimeter of unit base requires support when elevated above mounting surface
22. or correct running amps 5 Make sure filter is in place before unit start up 6 Before placing the unit into full operation energize the unit for three false starts Energize the compressor just long enough for it to make a few revolutions wait five to seven minutes before repeating a second and third time Cooling Sequence of Operation When the thermostat calls for cooling the R to Y circuit is closed to energize the compressor contactor The contactor brings on both the compressor and outdoor fan The thermostat also closes the R to circuit to energize the circulating air blower When the cooling demand is satisfied the thermostat opens the circuits as well as the compressor contactor The compressor and outdoor fan immediately stop The circulating air blower continues operating through a 90 second delay Unit compressors have internal protection If there is an abnormal rise in the compressor temperature the protector will open and the compressor will stop System Performance For maximum performance of this cooling system the operating temperatures and pressure should be checked and subcooling determined at Standard ARI test conditions of 82 F outdoor temperature 80 F indoor dry bulb 67 F indoor wet bulb If subcooling measured deviates from values in table 6 refrigerant charge should be adjusted accordingly for maximum performance Table 6 Suction Superheat Values Suction Superheat U
23. pressor start wiring or connections Compressor start winding is damaged Yellow Alert Flash Code 8 Welded Contactor Compressor always runs Compressor contactor failed to open Thermostat demand signal not connected to module Yellow Alert Flash Code 9 Low Voltage Control circuit lt 17VAC Control circuit transformer is overloaded Low line voltage contact utility Flash code number corresponds to a number of LED flashes followed by a pause and then repeated Reset ALERT flash code by removing 24VAC power from monitor last code will display for 1 minute after monitor is powered on Page 12 Unit Start Up and Operation Each 15CHAX packaged cooling unit is factory charged with R 410A refrigerant The compressor is hermetically sealed internally sprung and base mounted with rubber insulated hold down bolts Pre Start Check List 1 Make sure refrigerant lines do not rub against the cabi net or each other 2 Inspect all electrical wiring both factory and field installed for loose connections 3 Check voltage at the disconnect switch Voltage must be within the range listed on the unit nameplate If not consult power company and have voltage condition corrected before starting unit 4 Recheck voltage with unit running If power is not with in the range listed on the unit nameplate stop the unit and consult the power company Check unit amper age Refer to unit nameplate f
24. ty codes These instructions are intended as a general guide and do not supersede local codes in any way Consult authorities having jurisdiction before installation If components are to be added to a unit to meet local codes they are to be installed at the dealer s and or customer s expense These units are design listed by UL in both the United States and Canada as follows e Foruse as a cooling unit e For outdoor installation only Page 3 e Forinstallation on combustible material WARNING Product contains fiberglass wool Disturbing the insulation in this product 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 799900 Dallas TX 75379 9900 Location Selection Use the following guidelines to select a suitable location for these units 1 Unit is designed for outdoor installation only Unit must be installed so all electrical components are protected from water 2 Condenser coils must have an unlimited supply of air 3 For ground level installation use a level pre fabricated pad or use a level c
25. ut of limits or compressor overloaded High head pressure Condenser coil poor air circulation dirty blocked dam Condenser fan is not running Return air duct has substantial leakage If low pressure switch is present see Flash Code 1 info Yellow Alert Flash Code 3 Short Cycling Compres Sor is running only briefly Thermostat demand signal is intermittent Time delay relay or control board is defective If high pressure switch is present see Flash Code 2 info If low pressure switch is present see Flash Code 1 info Yellow Alert Flash Code 4 Locked Rotor Run capacitor has failed Low line voltage contact utility Excessive liquid refrigerant in the compressor Compressor bearings are seized Yellow Alert Flash Code 5 Open Circuit Outdoor unit power disconnect is open Unit circuit breaker or fuse s is open Unit contactor has failed to close High pressure switch is open and requires manual reset Open circuit in compressor supply wiring or connections Unusually long compressor protector reset time due to extreme ambient temperature Compressor windings are damaged Yellow Alert Flash Code 6 Open Start Circuit Current only in run circuit Run capacitor has failed Open circuit in compressor start wiring or connections Compressor start winding is damaged Yellow Alert Flash Code 7 Open Run Circuit Current only in start circuit Open circuit in com
26. ways be installed ahead of evaporator coil and must be kept clean or replaced Dirty filters will reduce the airflow of the unit Filter sizes are shown in table 1 Table 1 Unit Filter Size Unit Modei Filter Size Filter Quantity 224 30 36 20 in X 25 in 42 48 60 16 in X 25 in The Healthy Climate PureAir air purification system PCO20 28 may be used with 15CHAX units installed in horizontal air discharge applications only Installation hardware kit 0629 is required to install the PCO20 28 X8787 in the packaged unit The PCO20 28 is designed for universal voltage and is ready to operate at 208 230V When used the PCO should be installed before the unit is set in place and before the duct connections are made Supply amp Return Duct Connections The duct system should be designed and sized according to the methods in Manual Q of the Air Conditioning Contractors of America ACCA A closed return duct system shall be used This shall not preclude use of economizers or outdoor fresh air intake It is recommended that supply and return duct connections at the unit be made with flexible joints The supply and return air duct systems should be designed for the CFM and static requirements of the job They should NOT be sized by simply matching the dimensions of the duct connections on the unit Ducting installed outdoors MUST be insulated and waterproofed CAUTION When fastening duct system to s
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