INSTALLER`S GUIDE
Contents
1. LIQUID LINE SERVICE VALVE E 1 D FEMALE BRAZED CONNECTION WITH 1 4 SAE FLARE PRESSURE TAP FITTING A Fer 252 0234 232 0204 FIG 1 GAS LINE 1 4 TURN BALL SERVICE VALVE D 1 D FEMALE BRAZED CONNECTION WITH 1 4 SAE FLARE PRESSURE TAP FITTING B C D E F 724 28 1 2 651 25 5 8 5 8 1 4 127 5 724 28 1 2 651 25 5 8 3 4 5 16 137 5 3 8 829 32 5 8 756 29 3 4 3 4 5 16 137 5 3 8 LINE SERVICE VALVE D 1 D FEMALE BRAZED CONNECTION WITH 1 4 SAE FLARE PRESSURE TAP FITTING FIG 2 H J K 181 7 1 8 44 1 3 4 457 18 210 8 1 4 57 2 1 4 457 18 210 8 1 4 79 3 1 8 508 20 57 2 1 4 65 2 5 8 86 3 3 8 841 33 1 8 946 37 1 4 870 34 1 4 7 8 3 8 152 6 7 8 219 8 5 8 86 3 3 8 20 1045 41 1 8 946 37 1 4 870 34 1 4 219 8 5 8 86 3 3 8 508 20 2A7B3048A 4 1 2A7B3060A 4 1 Pub No 11 AC17D1 1 1045 41 1 8 946 37 1 4 870 34 1 4 219 8 5 8 86 3 3 8 508 20 From Dwg 21D153074 Rev 10 PAGE 7 INSTALLER S GUIDE MOUNTING HOLE LOCATION note All Dimensions Are In MM Inches PN 10 43 pi I TL 6 74 DRILL 124 4 90 4 PLACES DRILL 4 PLACES I 609 23 99 ag 688 27 09 580 22 852. 317 12 49 le gt 335 13 19 205 8 07 nie j 221 8 69 O He 482 18 99 310 12 20 ov H 599 123 58 gt 517 20 34 TERET BASE 2 i BASE 3 RILL 4 PLACES 195 31 28 TIT 28 24 NOTE For model base size see table on page 7 317 12 48 213 8 39 O O O O Q oo 1 a y 23 58 _ 127 28 64 BASE 4 From Dwg 21D152989 Rev 0 CHECKOUT PROCEDURE After installation has been completed it is recommended that the entire system be checked against the following list 1 Refrigerant Line Leak Checked rrnnunrvnnrnvrnrnvnvnnnrnvrnnnn 8 Supply registers and return grilles 2 Suction Lines and Fittings properly insulated open and unobstructed ccccceeeeeeeeeeeeteeeeteeeeneeeeeees 3 Have all Refrigerant Lines been secured 9 Return air filter installed rnrrrnnnronnrrrnnnnrnnnrrrnnnrrnnnnnnn and isolated properly mmsrrrrrnnvrrnvnvrnrrrvrnnrnnrnnrrnvnnrervenn 10 Thermostat thermometer is accurate Check against a reliable thermometer 4 Have passages through masonry been sealed A If mortar is used prevent mortar from coming into Adjust per instructions with thermostat direct contact with copper tubing srrrrrrvennrvvrarnrnvrerennnn 11 Is correc
3. enough away from any structure to prevent excess roof run off water from pouring directly on the unit When choosing the location of the unit s sound transmission through air and refrigerant lineset should be taken into consideration It is recommended to locate unit s away from areas bedrooms etc where such sound could be objectionable 4 The top discharge area must be unrestricted for at least five 5 feet above the unit 5 When the outdoor unit is mounted on a roof be sure the roof will support the unit s weight Properly selected isolation is recommended to prevent transmission to the building structure 6 The maximum length of refrigerant lines from outdoor to indoor unit should NOT exceed sixty 60 feet Since the manufacturer has a policy of continuous product and product data improvement it reserves the right to change design and specifications without notice INSTALLER S GUIDE BASEPAN TAB REMOVAL 7 Ifoutdoor unit is mounted above the air handler maximum lift should not exceed sixty 60 feet suction line Ifair handler is mounted above condensing unit maximum lift should not exceed sixty 60 feet liquid line 8 Locate and install indoor coil or air handler in accordance with instruction included with that unit NOTE Refer to Refrigerant Piping Software Pub No 32 3312 0 and Refrigerant Piping Manual Pub No 32 3009 0 the position of the denotes latest revision number C I
4. n W SN pg FRC DFT a a TST FAULT IDENTIFICATION A fault condition is indicated by the flashing light on the defrost control inside the heat pump control box In normal operation the defrost control light will flash once each second If the light is flashing more than once per second or not at all refer to the service manual for that unit PIN IDENTIFICATION See Figure 6 1 TEST_COMMON Shorting any of the other pins to this pin causes the function of the other pin to be executed Leaving this pin open results in the normal mode of operation 2 TST Test Shorting TEST_COMMON to this pin speeds up all defrost board timings 3 FRC_DFT Forced Defrost Short TEST COMMON to this pin for two 2 seconds to initiate a forced defrost Remove the short after defrost initiates DEFROST CONTROL CHECKOUT Normal operation requires a LED on board flashing 1 time second b 24V AC between R amp B c 24V AC between Y amp B with unit operating d Defrost initiation when FRC_DFT pin is shorted to TEST_COMMON pin If a defrost control problem is suspected refer to the service information in control box A WARN NG Do NOT connect 24V AC to T1 ODS A terminal ODS A thermistor WILL BE BLOWN G COMPRESSOR START UP After all electrical wiring is complete SET THE THERMO STAT SYSTEM SWITCH IN THE OFF POSITION SO COM PRESSOR WILL NOT RUN and apply power by closing the system main disconnect switch This
5. Curves in Service Facts to verify typical performance R 22 SUBCOOLING CHARGING TABLE ce 0 2 LIQUID LINE PRESSURE psi se w so o vos 1009 eo fm mem ml o fe me mm so o 16 o LIQUID TEMP F SUBCOOL CHARGING TABLE CORRECTIONS FOR LINE LENGTH AND RISE i Zu Tu LI Eb ok T u Wi Z ra O Subtract 5 psig from S C Table Pressure 10 20 25 Add 5 psig to Subcool Charging Table Pressure Use Design Subcool Value from Table 30 40 60 TOTAL REFRIGERANT LINE LENGTH FEET PAGE 6 Pub No 11 AC17D1 1 INSTALLER S GUIDE 2A7B3 OUTLINE DRAWING NOTE ALL DIMENSIONS ARE IN MM INCHES SERVICE PANEL ELECTRICAL AND REFRIGERANT COMPONENT CLEARANCES PER PREVAILING CODES TOP DISCHARGE AREA SHOULD BE UNRESTRICTED FOR AT LEAST 152 ABOVE UNIT 4 5 FEET UNIT SHOULD BE PLACED SO ROOF RUN OFF WATER DOES NOT POUR DIRECTLY ON UNIT AND SHOULD BE AT LEAST 305 12 ALL SURROUNDING SHRUBBERY ON OTHER TWO SIDES UNRESTR T FROM WALL AND TWO SIDES CTED K ELECTRICAL SERVICE PANEL y HE LOW VOLTAGE 22 2 7 8 DIA 28 6 1 1 8 DIA K O WITH 22 2 7 8 DIA HOLE IN CONTROL BOX BOTTOM FOR ELECTRICAL POWER SUPPLY LIQUID LINE SERVICE VALVE E 1 0 FEMALE BRAZE CONNECTION WITH 1 4 SAE FLARE PRESSURE TAP FITTING
6. will activate the compres sor sump heat where used Do not change the Thermostat System Switch until power has been applied for one 1 hour Following this procedure will prevent potential compressor overload trip at the initial start up Pub No 11 AC17D1 1 H OPERATIONAL AND CHECKOUT PROCEDURES Final phases of this installation are the unit Operational and Checkout Procedures which are found in this instruction on page 8 To obtain proper performance all units must be oper ated and charge adjustments made in accordance with proce dures found on page 6 and in the Service Facts I ELECTRIC HEATERS Electric heaters if used are to be installed in the air handling device according to the instructions accompanying the air han dler and the heaters J OUTDOOR THERMOSTAT An outdoor thermostat TAYSTAT250B may be field installed For data see wiring diagram attached to unit and instruction sheet packaged with outdoor thermostat K SEACOAST SALT SHIELD BAYSEAC001 Seacoast Kit is available for application on units installed within one mile of salt water including sea coasts and inland waterways INSTALLER S GUIDE L TROUBLESHOOTING CHART TROUBLESHOOTING CHART WHAT TO CHECK SYSTEM FAULTS REFRIGERANT CIRCUIT Liquid Pressure Too High Liquid Pressure Too Low Suction Pressure Too High Suction Pressure Too Low Liquid Refrig Floodback TXV System LD Coil Frosting Compresso
7. Amoricam Standard 11 AC17D1 1 INSTALLER S GUIDE ALL phases of this installation must comply with NATIONAL STATE AND LOCAL CODES Condensing Units Models 2A7B3018 060A1000A IMPORTANT This Document is customer property and is to remain with this unit Please return to service information pack upon completion of work These instructions do not cover all variations in systems nor provide for every possible contingency to be met in connection with installation All phases of this installa tion must comply with NATIONAL STATE AND LOCAL CODES Should further information be desired or should particular problems arise which are not covered sufficiently for the purchaser s purposes the matter should be referred to your installing dealer or local distributor A GENERAL WA R N NG This information is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience Any attempt to repair a central air conditioning product may result in personal injury and or property damage The manufac turer or seller cannot be responsible for the interpreta tion of this information nor can it assume any liability in connection with its use NOTE AMERICAN STANDARD HAS ALWAYS RECOM MENDED INSTALLING AMERICAN STANDARD AP PROVED MATCHED INDOOR AND OUTDOOR SYSTEMS THE BENEFITS OF INSTALLING APPROVED MATCHED SYSTEMS ARE MAXIMUM EFFICIENCY OPTIMUM PER FORMANCE AND BEST OVERALL SYSTEM RELIA
8. BILITY Check for transportation damage after unit is uncrated Report promptly to the carrier any damage found to the unit To determine the electrical power requirements of the unit refer to the nameplate of the unit The electrical power available must agree with that listed on the nameplate B LOCATION AND PREPARATION OF THE UNIT 1 When removing unit from the pallet notice the tabs on the basepan Remove tabs by cutting with a sharp tool as shown in Figure 2 see page 2 2 The unit should be set on a level support pad at least as large as the unit base pan such as a concrete slab If this is not the application used please reference ALG APG0 EN latest revi sion number 3 The support pad must NOT be in direct contact with any structure Unit must be positioned a minimum of 12 from any wall or surrounding shrubbery to insure adequate airflow Clearance must be provided in front of control box access 2005 American Standard Inc All Rights Reserved 1 5 FT ABOVE UNIT UNRESTRICTED EE SS E NN 0 W ANLA NANN Wy NN pe EE cae a ee a en Oo a D TA Zo a BBS a Sa aa FS aa ae ea aa Sa San SS an Sa S55 on aN tS Sa ee SS Se Pe ae Wy NNN panels amp any other side requiring service access to meet National Electrical Code Also the unit location must be far
9. NSTALLING REFRIGERANT LINES A CAU TI ON If using existing refrigerant lines make certain that all joints are brazed not soldered Condensing units have provisions for braze connections Pressure taps are provided on the service valves of outdoor unit for compressor suction and liquid pressures The indoor end of the recommended refrigerant line sets may be straight or with a 90 degree bend depending upon situation requirements This should be thoroughly checked out before ordering refrigerant line sets The gas line must always be insulated A CAUTION In scroll compressor applica tions dome temperatures may be hot Do not touch top of compressor may cause minor to severe burning The units are factory charged with the system charge required when using fifteen 15 feet of rated connecting line Unit nameplate charge is the same 3 LIQUID LINE SERVICE VALVE ROLLED EDGE TO CAPTIVATE STEM CAP gt 2 UNIT SIDE OF HEX HEADED SERVICE VALVE I Dy 9 VALVE SYSTEM 3 Soy SERVICE gt y LIQUID LINE CONNECTION PAGE 2 Final refrigerant charge adjustment is necessary Use the Charging Information on page 6 or in the outdoor unit Service Facts 1 Determine the most practical way to run the lines 2 Consider types of bends to be made and space limitations NOTE Large diameter tubing will be very difficult to rebend once it has been shaped 3 Determine the best starting point for routin
10. Precautions should be taken to avoid heat damage to basepan during brazing It is recommended to keep the flame directly off of the basepan 7 Use a Dry Nitrogen Purge and Brazing Alloy without flux when brazing the field line to the copper factory connection Flow dry nitrogen into either valve pressure tap port thru the tubing and out the other port while brazing 8 Braze using accepted good brazing techniques LEAK CHECK IMPORTANT Replace pressure tap port valve core before attaching hoses for evacuation After the brazing operation of refrigerant lines to both the outdoor and indoor unit is completed the field brazed connec tions must be checked for leaks Pressurize through the service valve ports the indoor unit and field refrigerant lines with dry nitrogen to 350 400 psi Use soap bubbles or other leak checking methods to see that all field joints are leak free Ifnot release pressure then repair Pub No 11 AC17D1 1 INSTALLER S GUIDE GAS LINE SERVICE VALVE ROLLED EDGE TO CAPTIVATE STEM CAP gt a O UNIT SIDE OF lt HEX HEADED SERVICE VALVE in VALVE SYSTEM SERVICE gt PORT gt GAS LINE CONNECTION SYSTEM EVACUATION NOTE Since the outdoor unit has a refrigerant charge the gas and liquid line valves must remain closed 1 Upon completion of leak check evacuate the refrigerant lines and indoor coil before opening the gas and liquid line valves 2 Attach approp
11. ard split systems are ARI rated with only TXV indoor systems The benefits of installing approved indoor and outdoor split systems are maximum efficiency optimum performance and the best overall system reliability The following charging methods are therefore prescribed for systems with indoor TXVs 1 Subcooling in the cooling mode is the only recommended method of charging above 55 F ambient temperatures 2 For best results the indoor temperature should be kept between 70 F to 80 F Add system heat if needed 3 At start up or whenever charge is removed or added the system must be operated for a minimum 20 minutes to stabilize before accurate measurements can be made 4 Measure Liquid Line Temperature and Refrigerant Pres sure at service valves 5 Determine total refrigerant line length and height lift if indoor section is above the condenser 6 Determine the Design Subcool Charging Temperature from the unit nameplate 7 Locate this value in the appropriate column ofthe Subcooling Charging Table Locate your liquid line temperature in the left column of the table and the intersecting liquid line pressure under your nameplate subcool value column Add refrigerant to raise the pressure to match the table or remove refrigerant to lower the pressure Again wait 20 minutes for the system conditions to stabilize before adjusting charge again 8 When system is correctly charged you can refer to System Pressure
12. ate disconnect switch at the outdoor unit 4 Ground the outdoor unit per local code requirements 5 Provide flexible electrical conduit whenever vibration trans mission may create a noise problem within the structure 6 The use of color coded low voltage wire is recommended to simplify connections between the outdoor unit the thermostat and the indoor unit Table 1 NEC Class II Wiring 24 VOLTS MAX WIRE LENGTH 150 FT 225 FT 300 FT WIRE SIZE 18 AWG 16 AWG 14 AWG 7 Table 1 defines maximum total length of low voltage wiring from outdoor unit to indoor unit and to thermostat 8 Mount the indoor thermostat in accordance with instruction included with the thermostat Wire per appropriate hookup diagram included in these instructions F DEFROST CONTROL The demand defrost control measures heat pump outdoor ambi ent temperature with a sensor located outside the outdoor coil A second sensor located on the outdoor coil is used to measure the coil temperature The difference between the ambient and the colder coil temperature is the difference or delta T measure ment This delta T measurement is representative of the operating state and relative capacity of the heat pump system By measuring the change in delta T we can determine the need for defrost The coil sensor also serves to sense outdoor coil temperature for termination of the defrost cycle PAGE 4 6 PIN IDENTIFICATION z e Q Oo H
13. e Figures 3 and 5 No torque is required BRASS GAS LINE BALL SERVICE VALVE The Brass Gas Line Ball Service Valve is shipped in the closed position to hold the factory refrigerant charge The pressure tap service port when depressed opens only to the field brazing side when the valve is in the closed position The Gas Line Service Valve is full open with a 1 4 turn See Figure 4 BRAZING REFRIGERANT LINES 1 Remove lower access cover to access service valves 2 Before brazing remove plugs from external copper stub tubes Clean internal and external surfaces of stub tubes prior to brazing Pub No 11 AC17D1 1 4 GAS LINE BALL SERVICE VALVE 1 4 TURN ONLY COUNTERCLOCKWISE FOR FULL OPEN lt POSITION CAP UNIT SIDE ra OF VALVE PRESSURE TAP PORT GAS LINE CONNECTION cona sje de eee 4 gt gt gt gt gt gt gt gt HEATING J i ae TN CORE 3 Cut and fit tubing minimizing the use of sharp 90 bends 4 Insulate the entire gas line and its fittings 5 Do NOT allow uninsulated liquid line to come in direct contact with bare gas line 6 Precautions should be taken to avoid heat damage to the pressure tap valve core during brazing It is recom mended that the pressure tap port valve core be removed and a wet rag wrapped around the valve body NOTICE Use care to make sure that no moisture enters pressure tap port while wet rag is being used NOTICE
14. g the refrigerant tubing INSIDE OR OUTSIDE THE STRUCTURE 4 Provide a pull thru hole of sufficient size to allow both liquid and gas lines 5 Be sure the tubing is of sufficient length 6 Uncoil the tubing do not kink or dent 7 Route the tubing making all required bends and properly secure the tubing before making connections 8 To prevent a noise within the building structure due to vibration transmission from the refrigerant lines the following precautions should be taken a When the refrigerant lines have to be fastened to floor joists or other framing in a structure use isolation type hangers b Isolation hangers should also be used when refrigerant lines are run in stud spaces or enclosed ceilings c Where the refrigerant lines run through a wall or sill they should be insulated and isolated d Isolate the lines from all ductwork D SERVICE VALVE OPERATION BRASS LIQUID AND GAS LINE SERVICE VALVES The Brass Liquid and Gas Line Service Valves are factory shipped in the seated position to hold factory charge The pressure tap service port when depressed opens only to the field brazing side of the valve when the valve is in the seated position The liquid line valve is not a back seating valve see WARNING below A WA R N N G Extreme caution should be ex ercised when opening the Liquid and Gas Line Service Valves Turn valve stem counterclockwise only until the stem contacts the rolled edge Se
15. il valve stem just touches rolled edge approximately five 5 turns observing WARNING state ment on page 2 See Figure 3 10 Replace liquid service pressure tap port cap and valve stem cap These caps MUST BE REPLACED to prevent leaks Replace valve stem and pressure tap cap finger tight then tighten an additional 1 6 turn PAGE 3 INSTALLER S GUIDE 11 The gas valve can now be opened For a ball type gas valve open the gas valve by removing the shut off valve cap and turning the valve stem 1 4 turn counterclockwise using 1 4 Open End or Adjustable wrench See Figure 4 For brass gas line service valve opening follow 9 and 10 above See Figure 5 12 The gas valve is now open for refrigerant flow Replace valve stem cap to prevent leaks Again these caps MUST BE REPLACED to prevent leaks Replace valve stem and pres sure tap cap finger tight then tighten an additional 1 6 turn See Figure 4 If refrigerant lines are longer than 15 feet and or a different size than recommended it will be necessary to adjust system refriger ant charge upon completion of installation See page 6 and unit Service Facts E ELECTRICAL CONNECTIONS A WAR N l N G When installing or servicing this equipment ALWAYS exercise basic safety precau tions to avoid the possibility of electric shock 1 Power wiring and grounding of equipment must comply with local codes 2 Power supply must agree with equipment nameplate 3 Install a separ
16. r Runs Inadequate or No Cooling ELECTRICAL Compressor amp O D Fan Do Not Start Compressor Will Not Start But O D Fan Runs 0 D Fan Won t Start Compressor Hums But Won t Start Compressor Cycles on IOL LD Blower Won t Start P Primary Causes S Secondary Causes TYPICAL FIELD WIRING DIAGRAMS T STAT AIR HANDLE HEAT PUMP ODT B OPTIONAL REMOTE x PRINTED FROM B152904P03 Notes Be sure power supply agrees with equipment nameplate VARIABLE SPEED T STAT ATR HANDLER HEAT PUMP PRINTED FROM B152934P04 LEGEND Power wiring and grounding of equipment must comply with local codes Low voltage wiring to be No 18 AWG minimum conductor ODT B must be set lower than ODT A If outdoor thermostats ODT are not used connect W1 to W2 and W3 N A to programmable thermostat Pub No 11 AC17D1 1 FACTORY WIRING FIELD WIRING PAGE 5 INSTALLER S GUIDE SUBCOOLING CHARGING IN COOLING ABOVE 55 F OD AMBIENT American Standard has always recommended installing American Standard approved matched indoor and outdoor systems All 13 SEER American Stand
17. riate hoses from manifold gauge to gas and liquid line pressure taps NOTE Unnecessary switching of hoses can be avoided and complete evacuation of all lines leading to sealed system can be accomplished with manifold center hose and connecting branch hose to a cylinder of HCFC 22 and vacuum pump 3 Attach center hose of manifold gauges to vacuum pump 4 Evacuate until the micron gauge reads no higher than 350 microns 5 Close off valve to vacuum pump and observe the micron gauge If gauge pressure rises above 500 microns in one 1 minute then evacuation is incomplete or system has a leak 6 If vacuum gauge does not rise above 500 microns in one 1 minute the evacuation should be complete 7 With vacuum pump and micron gauge blanked off open valve on HCFC 22 cylinder and charge refrigerant lines and indoor coil with vapor to tank pressure of HCFC 22 supply NOTE DO NOT VENT REFRIGERANT INTO THE ATMOSPHERE 8 Close valve on HCFC 22 supply cylinder Close valves on manifold gauge set and remove refrigerant charging hoses from liquid and gas pressure tap ports NOTE A 3 16 Allen wrench is required to open liquid line service valve A 1 4 Open End or Adjustable wrench is required to open gas line valve A 3 4 Open End wrench is required to take off the valve stem cap 9 The liquid line shut off valve can now be opened Remove shut off valve cap Fully insert hex wrench into the stem and back out counterclockwise unt
18. t speed tap being used 5 Verify tightness of all electrical connects Indoor blower motor 00 cece eeeeeeeeeeeeteeeeeeeeteeeeeteeenneeeaes 6 Observe outdoor fan during on cycle for 12 Operate complete system in each mode clearance and smooth operation scssssscsescssessesseeeereees to insure safe operation arnnrnnonnnrnrnnnnrnnnnrnnnnnnnnnrnnnnn 7 Indoor coil drain line drains freely Pour water into drain pan ssrnnrrrennrrnnrrrrnnnnrrnrrrnnnnrrnnnnn Technical Literature Printed in U S A American Standard Inc Troup Highway Pub No 11 AC17D1 1 Tyler TX 75707 9010 P I 9 05
Download Pdf Manuals
Related Search