Bryant 577C--A Installation Instructions Manual Download Page 7

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ACCESS PANELS MUST BE IN PLACE WHEN RIGGING.

PANNEAUX D'ACCES DOIT ÊTRE EN PLACE POUR MANIPULATION.

50CY502286 2.0

CAUTION - NOTICE TO RIGGERS
PRUDENCE - AVIS AUX MANIPULATEUR

Use top skid as spreader bar. / Utiliser la palette du haut comme barre de répartition

SEAL STRIP MUST BE IN
PLACE BEFORE PLACING
UNIT ON ROOF CURB

DUCTS

DETAIL A

VOIR DÉTAIL A

MINIMUM HEIGHT: 36" (914.4 mm)
HAUTEUR MINIMUM

UNIT HEIGHT
HAUTEUR D'UNITÉ

SEE DETAIL A
VOIR DÉTAIL A

BANDE SCELLANT DOIT ÊTRE
EN PLACE AVANT DE PLACER
L'UNITÉ SUR LA BASE DE TOIT

A09051

SMALL CABINET

LARGE CABINET

Unit *

Rigging Weight

337

153

349

158

383

174

Rigging Weight

472

214

490

222

518

235

* For 460 volt units add 14 lb (6.35 kg) to the rigging weight.

NOTE: See dimensional drawing for corner weights.

Fig. 6 -- 577C----A Unit Suggested Rigging

577C

Summary of Contents for 577C--A

Page 1: ...Air Blower 49 Flue Gas Passageways 49 Limit Switch 49 Burner Ignition 49 A09033 Fig 1 Unit 577C A Low NOx Model Available Main Burners 49 Removal of Gas Train 49 Outdoor Coil Indoor Coil Condensate Drain Pan 49 Outdoor Fan 50 Electrical Controls and Wiring 50 Refrigerant Circuit 51 Gas Input 51 Evaporator Airflow 51 Puron Items 51 TROUBLESHOOTING 52 START UP CHECKLIST 52 SAFETY CONSIDERATIONS Impr...

Page 2: ...n office if any item is missing To prevent loss or damage leave all parts in original packages until installation If the unit is to be mounted on a curb in a downflow application review Step 9 to determine which method is to be used to remove the downflow panels before rigging and lifting into place The panel removal process may require the unit to be on the ground Step 2 Provide Unit Support For ...

Page 3: ...le and install this equipment When working with this equipment observe precautions in the literature on tags stickers and labels attached to the equipment and any other safety precautions that might apply Training for operators of the lifting equipment should include but not be limited to the following 1 Application of the lifter to the load and adjustment of the lifts to adapt to various sizes or...

Page 4: ...4 A09477 Fig 3 577C A24 36 Unit Dimensions 577C A ...

Page 5: ...5 A09478 Fig 4 577C A42 60 Unit Dimensions 577C A ...

Page 6: ...m B large base IN mm C IN mm D IN mm E IN mm F IN mm G IN mm H IN mm Small or Large CPRFCURB010A00 11 279 10 254 14 356 16 406 47 8 1214 32 4 822 2 7 69 30 6 778 46 1 1170 CPRFCURB011A00 14 356 Large CPRFCURB012A00 11 279 14 356 43 9 1116 42 2 1072 CPRFCURB013A00 14 356 Part Numbers CPRCURB010A00 and CPRCURB011A00 can be used on both small and large basepan units The cross supports must be located...

Page 7: ...DETAIL A VOIR DÉTAIL A MINIMUM HEIGHT 36 914 4 mm HAUTEUR MINIMUM UNIT HEIGHT HAUTEUR D UNITÉ SEE DETAIL A VOIR DÉTAIL A BANDE SCELLANT DOIT ÊTRE EN PLACE AVANT DE PLACER L UNITÉ SUR LA BASE DE TOIT A09051 SMALL CABINET LARGE CABINET Unit 24 30 36 Unit 42 48 60 lb kg lb kg lb kg lb kg lb kg lb kg Rigging Weight 337 153 349 158 383 174 Rigging Weight 472 214 490 222 518 235 For 460 volt units add 1...

Page 8: ...it 577C A Cont UNIT SIZE 48090 48115 48130 60090 60115 60130 NOMINAL CAPACITY ton 4 4 4 5 5 5 SHIPPING WEIGHT lb SHIPPING WEIGHT kg 490 222 490 222 490 222 518 235 518 235 518 235 COMPRESSORS Quantity Scroll 1 REFRIGERANT R 410A Quantity lb Quantity kg 9 4 4 3 9 4 4 3 9 4 4 3 12 5 5 7 12 5 5 7 12 5 5 7 REFRIGERANT METERING DEVICE TXV OUTDOOR COIL Rows Fins in Face Area sq ft 2 21 17 5 2 21 17 5 2 ...

Page 9: ... supply pipe enters the unit through the access hole provided The gas connection to the unit is made to the 1 2 in 12 7 mm FPT gas inlet on the gas valve Install a gas supply line that runs to the heating section Refer to the NFGC for gas pipe sizing Do not use cast iron pipe It is recommended that a black iron pipe is used Check the local utility for recommendations concerning existing lines Size...

Page 10: ... required or allowed by authority having jurisdiction black iron pipe shall be installed at furnace gas valve and extend a minimum of 2 in 51 mm outside furnace casing If codes allow a flexible connector always use a new connector do not use a connector which has previously serviced another gas appliance WARNING 8 Check for gas leaks at the field installed and factory installed gas lines after all...

Page 11: ... Electrical Code CSA C22 1 and local electrical codes WARNING UNIT COMPONENT DAMAGE HAZARD Failure to follow this caution may result in damage to the unit being installed 1 Make all electrical connections in accordance with NFPA 70 NEC latest edition and local electrical codes governing such wiring In Canada all electrical connections must be in accordance with CSA standard C22 1 Canadian Electric...

Page 12: ...16 AWG color coded insulated 35_C minimum wires Standard Connection Run the low voltage leads from the thermostat through the inlet hole and into unit low voltage splice box Locate six seven for 3 phase 18 gage wires leaving control box These low voltage connection leads can be identified by the colors red green yellow brown blue and white See Fig 10 A gray wire is standard on 3 phase units for co...

Page 13: ...ould result in personal injury death or property damage Do not purge gas supply into the combustion chamber Do not use a match or other open flame to check for gas leaks Use a commercially available soap solution made specifically for the detection of leaks to check all connections A fire or explosion may result causing property damage personal injury or loss of life WARNING 4 Verify the following...

Page 14: ...0 m refer to the unit rating plate For installations above 2 000 ft 610 m multiply the input by on the rating plate by the derate multiplier in Table 3 for correct input rate Table 3 Altitude Derate Multiplier for U S A ALTITUDE FT M PERCENT OF DERATE DERATE MULTIPLIER FACTOR 0 2000 0 610 0 1 00 2001 3000 610 914 8 12 0 90 3001 4000 915 1219 12 16 0 86 4001 5000 1220 1524 16 20 0 82 5001 6000 1524...

Page 15: ... must be between 3 2 and 3 8 IN W C FIRE AND UNIT DAMAGE HAZARD Failure to follow this warning could result in personal injury or death and or property damage Unsafe operation of the unit may result if manifold pressure is outside this range WARNING 3 Replace regulator cover screw on gas valve See Fig 13 4 Turn off gas supply to unit Remove manometer from pressure tap and replace pipe plug on gas ...

Page 16: ...16 A09282 Fig 14 208 230 1 60 Connection Wiring Diagram 577C A ...

Page 17: ...17 A09282 Fig 14 Cont 208 230 1 60 Ladder Wiring Diagram 577C A ...

Page 18: ...18 A09264 Fig 15 208 230 3 60 Connection Wiring Diagram 577C A ...

Page 19: ...19 A09264 Fig 15 Cont 208 230 3 60 Ladder Wiring Diagram 577C A ...

Page 20: ...SES 3 USE 75 DEG COPPER CONDUCTORS FOR FIELD INSTALLATION 4 SEE INSTALLATION INSTRUCTIONS FOR PROPER HEATING AND COOLING CONNECTIONS FOR YOUR UNIT INDOOR FAN MOTOR PLUGS DO NOT DISCONNECT UNDER LOAD 5 LS2 USED ON SMALL CHASSIS ONLY 6 INDUCER CAPACITOR AND WIRING ON CERTAIN MODELS ONLY IF CAP2 IS PRESENT YELLOW WIRES FROM CONTACTOR AND IDM CONNECT ON SAME SIDE OF CAP2 7 THIS FUSE IS MANUFACTURED BY...

Page 21: ...C P2 2 C C COM P1 2 C L1 SEE NOTE 6 IFB IFB C 11 11 13 13 Y IGC IGC BR GY W R BK R R BR BL L2 1 2 4 3 5 IFM BL O P R BK SEE NOTE 4 FS SEE NOTE 5 5A FUSE RT IFB OFM CONTROL BOX AREA COMP T1 T2 T3 CAP 1 H C F IFM 3 UNIT COMPONENT ARRANGEMENT OUTDOOR FAN SECTION COMPRESSOR SECTION INDOOR FAN SECTION TRAN C 21 23 13 11 LS1 IGC CAP 2 IDM I MGV MC FS RS GAS SECTION SMALL CABINET LS1 LARGE LS2 SMALL SEE ...

Page 22: ... LED in sequence Rollout Switch The function of the rollout switch is to close the main gas valve in the event of flame rollout The switch is located above the main burners When the temperature at the rollout switch reaches the maximum allowable temperature the control circuit trips closing the gas valve and stopping gas flow to the burners The indoor evaporator fan motor IFM and induced draft mot...

Page 23: ...ional speed tap wires available for use in either gas heating or cooling For color coding on the indoor fan motor leads see Table 6 The additional 3 speed tap wires are shipped loose with vinyl caps and are located in the control box near the interface fan board IFB See Fig 17 Gas Heating Fan Speed Set up To change the gas heating speed 1 Remove the vinyl cap off of the desired speed tap wire Refe...

Page 24: ...hermostat terminal R to terminals Y and G 2 The normally open contacts of energized contactor C close and complete the circuit through compressor motor COMP to condenser outdoor fan motor OFM Both motors start instantly 3 The set of normally open contacts on the interface fan board IFB are closed which energizes a circuit to the indoor fan motor IFM NOTE Once the compressor has started and then st...

Page 25: ...25 Table 7 Cooling Charging Chart A09083 577C A ...

Page 26: ...A NA NA Heating Rise o C 17 18 20 22 25 29 NA NA NA High Black CFM 1241 1167 1111 1036 969 881 818 731 640 Heating Rise o F NA NA NA NA 31 34 37 41 47 Heating Rise o C NA NA NA NA 17 19 21 23 26 577C N P E WA24060 25 55 14 31 Low Blue CFM 754 650 538 429 Heating Rise o F NA NA NA NA NA NA NA NA NA Heating Rise o C NA NA NA NA NA NA NA NA NA Med Low Pink CFM 851 777 675 591 475 Heating Rise o F 52 ...

Page 27: ...4 54 NA Heating Rise o C NA NA 17 18 20 22 24 30 NA High Black CFM 1202 1140 1082 1015 961 881 810 732 631 Heating Rise o F NA NA NA 30 31 34 37 41 48 Heating Rise o C NA NA NA 17 17 19 21 23 27 577C N P E WA30060 25 55 14 31 Low Blue CFM 741 638 547 415 Heating Rise o F NA NA NA NA NA NA NA NA NA Heating Rise o C NA NA NA NA NA NA NA NA NA Med Low Pink CFM 973 887 823 733 665 538 451 Heating Rise...

Page 28: ...39 Heating Rise o C 15 16 17 17 18 19 20 20 22 High Black CFM 1630 1580 1517 1463 1407 1339 1277 1210 1131 Heating Rise o F 27 28 29 30 32 33 35 37 39 Heating Rise o C 15 16 16 17 18 18 19 20 22 577C N P E WA36090 35 65 19 36 Low Blue CFM 1234 1168 1093 1021 961 894 825 759 687 Heating Rise o F 55 58 62 NA NA NA NA NA NA Heating Rise o C 31 32 35 NA NA NA NA NA NA Med Low Pink CFM 1290 1223 1154 1...

Page 29: ...37 Heating Rise o C 16 17 17 17 18 19 19 20 21 High Black CFM 1705 1643 1607 1568 1518 1483 1448 1404 1360 Heating Rise o F 26 27 28 28 29 30 31 32 33 Heating Rise o C 14 15 15 16 16 17 17 18 18 577C N P E WA42090 35 65 19 36 Low Blue CFM 1295 1234 1182 1126 1075 1016 955 898 857 Heating Rise o F 53 55 58 60 63 NA NA NA NA Heating Rise o C 29 31 32 34 35 NA NA NA NA Med Low Pink CFM 1345 1282 1235...

Page 30: ...38 Heating Rise o C NA NA NA NA NA 19 20 20 21 High Black CFM 2344 2306 2259 2203 2141 2070 1991 1902 1803 Heating Rise o F NA NA NA NA NA NA NA 36 38 Heating Rise o C NA NA NA NA NA NA NA 20 21 577C N P E WA48115 30 60 17 33 Low Blue CFM 1402 1351 1311 1263 1224 1172 1136 1080 1041 Heating Rise o F NA NA NA NA NA NA NA NA NA Heating Rise o C NA NA NA NA NA NA NA NA NA Med Low Pink CFM 1457 1404 1...

Page 31: ...54 Heating Rise o C 25 25 26 26 27 28 28 29 30 High Black CFM 2344 2306 2259 2203 2141 2070 1991 1902 1803 Heating Rise o F 41 42 43 44 45 47 48 51 53 Heating Rise o C 23 23 24 24 25 26 27 28 30 577C N P E WA60090 35 65 19 36 Low 1 Blue CFM 1445 1389 1341 1281 1236 1189 1139 1072 1027 Heating Rise o F 47 49 51 53 55 57 60 63 NA Heating Rise o C 26 27 28 29 31 32 33 35 NA Med Low Pink CFM 1678 1635...

Page 32: ...5 19 36 Low Blue CFM 1445 1389 1341 1281 1236 1189 1139 1072 1027 Heating Rise o F NA NA NA NA NA NA NA NA NA Heating Rise o C NA NA NA NA NA NA NA NA NA Med Low Pink CFM 1678 1635 1602 1558 1513 1474 1438 1404 1349 Heating Rise o F 57 59 60 62 64 65 NA NA NA Heating Rise o C 32 33 33 34 35 36 NA NA NA Medium 2 Red CFM 1962 1915 1880 1843 1794 1753 1711 1675 1628 Heating Rise o F 49 50 51 52 54 55...

Page 33: ...Rise o C 19 21 24 27 NA NA Medium 2 Red CFM 939 860 748 663 591 472 399 WATTS 119 124 134 138 147 155 164 BHP 0 13 0 13 0 14 0 15 0 16 0 17 0 18 Heating Rise o F 32 35 40 46 51 NA NA Heating Rise o C 18 20 22 25 28 NA NA Med High 1 Orange CFM 1026 949 873 786 694 604 516 WATTS 146 151 161 167 177 183 195 BHP 0 16 0 16 0 17 0 18 0 19 0 20 0 21 Heating Rise o F NA 32 35 38 44 50 59 Heating Rise o C ...

Page 34: ...ng Rise o C 19 21 24 27 NA NA Medium 2 Red CFM 939 860 748 663 591 472 399 WATTS 119 124 134 138 147 155 164 BHP 0 13 0 13 0 14 0 15 0 16 0 17 0 18 Heating Rise o F 32 35 40 46 51 NA NA Heating Rise o C 18 20 22 25 28 NA NA Med High 1 Orange CFM 1026 949 873 786 694 604 516 WATTS 146 151 161 167 177 183 195 BHP 0 16 0 16 0 17 0 18 0 19 0 20 0 21 Heating Rise o F 29 32 35 38 44 50 NA Heating Rise o...

Page 35: ...20 23 25 30 NA Medium 2 Red CFM 1110 1025 967 879 814 706 611 509 461 WATTS 188 195 205 211 223 236 243 255 243 BHP 0 20 0 21 0 22 0 23 0 24 0 25 0 26 Heating Rise o F 27 29 31 34 37 43 49 59 NA Heating Rise o C 15 16 17 19 21 24 27 33 NA Med High 1 Orange CFM 1160 1091 1004 945 866 804 699 615 496 WATTS 213 225 232 243 249 261 273 285 291 BHP 0 23 0 24 0 25 0 26 0 27 0 28 0 29 0 31 0 31 Heating R...

Page 36: ...ting Rise o C 17 18 20 23 25 30 NA Medium 2 Red CFM 1110 1025 967 879 814 706 611 509 461 WATTS 188 195 205 211 223 236 243 255 243 BHP 0 20 0 21 0 22 0 23 0 24 0 25 0 26 0 27 0 26 Heating Rise o F 27 29 31 34 37 43 49 59 NA Heating Rise o C 15 16 17 19 21 24 27 33 NA Med High 1 Orange CFM 1160 1091 1004 945 866 804 699 615 496 WATTS 213 225 232 243 249 261 273 285 291 BHP 0 23 0 24 0 25 0 26 0 27...

Page 37: ...8 29 30 32 34 36 Heating Rise o C NA NA 14 15 15 16 17 18 19 20 Medium 2 Red CFM 1381 1326 1269 1212 1161 1121 1070 1019 974 912 WATTS 358 365 375 383 391 395 406 418 424 434 BHP 0 38 0 39 0 40 0 41 0 42 0 42 0 44 0 45 0 45 0 47 Heating Rise o F NA NA NA 25 26 27 28 30 31 33 Heating Rise o C NA NA NA 14 14 15 16 16 17 18 Med High 1 Orange CFM 1631 1579 1525 1477 1423 1372 1336 1284 1233 1166 WATTS...

Page 38: ...8 29 30 32 34 36 Heating Rise o C NA NA 14 15 15 16 17 18 19 20 Medium 2 Red CFM 1381 1326 1269 1212 1161 1121 1070 1019 974 912 WATTS 358 365 375 383 391 395 406 418 424 434 BHP 0 38 0 39 0 40 0 41 0 42 0 42 0 44 0 45 0 45 0 47 Heating Rise o F NA NA NA 25 26 27 28 30 31 33 Heating Rise o C NA NA NA 14 14 15 16 16 17 18 Med High 1 Orange CFM 1631 1579 1525 1477 1423 1372 1336 1284 1233 1166 WATTS...

Page 39: ... 34 35 37 39 40 42 44 Heating Rise o C NA NA NA 19 20 21 21 22 23 24 Medium Red CFM 1582 1549 1509 1469 1433 1392 1346 1300 1249 1213 WATTS 267 280 294 308 322 336 344 359 374 387 BHP 0 29 0 30 0 32 0 33 0 35 0 36 0 37 0 38 0 40 0 42 Heating Rise o F NA NA NA NA NA NA NA 34 36 37 Heating Rise o C NA NA NA NA NA NA NA 19 20 20 Med High 2 Orange CFM 1623 1586 1553 1511 1470 1433 1393 1350 1309 1261 ...

Page 40: ... 34 35 37 39 40 42 44 Heating Rise o C NA NA NA 19 20 21 21 22 23 24 Medium Red CFM 1582 1549 1509 1469 1433 1392 1346 1300 1249 1213 WATTS 267 280 294 308 322 336 344 359 374 387 BHP 0 29 0 30 0 32 0 33 0 35 0 36 0 37 0 38 0 40 0 42 Heating Rise o F NA NA NA NA NA NA NA 34 36 37 Heating Rise o C NA NA NA NA NA NA NA 19 20 20 Med High 2 Orange CFM 1623 1586 1553 1511 1470 1433 1393 1350 1309 1261 ...

Page 41: ...47 49 51 52 54 56 58 Heating Rise o C 24 25 26 26 27 28 29 30 31 32 Medium 2 Red CFM 1861 1822 1786 1758 1716 1688 1660 1619 1583 1539 WATTS 400 417 426 441 452 467 482 492 507 519 BHP 0 43 0 45 0 46 0 47 0 48 0 50 0 52 0 53 0 54 0 56 Heating Rise o F 37 37 38 39 40 40 41 42 43 44 Heating Rise o C 20 21 21 21 22 22 23 23 24 25 Med High Orange CFM 2319 2291 2255 2230 2193 2166 2118 2057 1992 1887 W...

Page 42: ...47 49 51 52 54 56 58 Heating Rise o C 24 25 26 26 27 28 29 30 31 32 Medium 2 Red CFM 1861 1822 1786 1758 1716 1688 1660 1619 1583 1539 WATTS 400 417 426 441 452 467 482 492 507 519 BHP 0 43 0 45 0 46 0 47 0 48 0 50 0 52 0 53 0 54 0 56 Heating Rise o F 37 37 38 39 40 40 41 42 43 44 Heating Rise o C 20 21 21 21 22 22 23 23 24 25 Med High Orange CFM 2319 2291 2255 2230 2193 2166 2118 2057 1992 1887 W...

Page 43: ...47 49 51 52 54 56 58 Heating Rise o C 24 25 26 26 27 28 29 30 31 32 Medium 2 Red CFM 1861 1822 1786 1758 1716 1688 1660 1619 1583 1539 WATTS 400 417 426 441 452 467 482 492 507 519 BHP 0 43 0 45 0 46 0 47 0 48 0 50 0 52 0 53 0 54 0 56 Heating Rise o F 37 37 38 39 40 40 41 42 43 44 Heating Rise o C 20 21 21 21 22 22 23 23 24 25 Med High Orange CFM 2319 2291 2255 2230 2193 2166 2118 2057 1992 1887 W...

Page 44: ... 39 40 41 42 43 45 46 Heating Rise o C 21 21 21 22 22 23 23 24 25 26 Medium 2 Red CFM 1944 1913 1872 1838 1801 1771 1731 1698 1655 1613 WATTS 486 501 511 529 537 554 565 578 595 603 BHP 0 52 0 54 0 55 0 57 0 58 0 59 0 61 0 62 0 64 0 65 Heating Rise o F 35 36 36 37 38 38 39 40 41 42 Heating Rise o C 19 20 20 21 21 21 22 22 23 23 Med High Orange CFM 2178 2148 2105 2073 2036 2002 1967 1919 1845 1751 ...

Page 45: ... 39 40 41 42 43 45 46 Heating Rise o C 21 21 21 22 22 23 23 24 25 26 Medium 2 Red CFM 1944 1913 1872 1838 1801 1771 1731 1698 1655 1613 WATTS 486 501 511 529 537 554 565 578 595 603 BHP 0 52 0 54 0 55 0 57 0 58 0 59 0 61 0 62 0 64 0 65 Heating Rise o F 35 36 36 37 38 38 39 40 41 42 Heating Rise o C 19 20 20 21 21 21 22 22 23 23 Med High Orange CFM 2178 2148 2105 2073 2036 2002 1967 1919 1845 1751 ...

Page 46: ... 61 0 62 0 64 0 65 Heating Rise o F 35 36 36 37 38 38 39 40 41 42 Heating Rise o C 19 20 20 21 21 21 22 22 23 23 Med High Orange CFM 2178 2148 2105 2073 2036 2002 1967 1919 1845 1751 WATTS 674 691 703 717 733 743 758 754 734 701 BHP 0 72 0 74 0 75 0 77 0 79 0 80 0 81 0 81 0 79 0 75 Heating Rise o F NA NA NA NA NA 34 35 35 37 39 Heating Rise o C NA NA NA NA NA 19 19 20 20 22 High Black CFM 2480 243...

Page 47: ... 600 1400 CFM 12x20x1 12x20x1 305x508x25 305x508x25 2 0 2 5 3 0 0 09 0 14 0 16 0 18 0 25 0 28 0 30 1200 1800 CFM 16x24x1 14x24x1 406x610x25 356x610x25 3 5 4 0 0 10 0 11 0 12 0 13 0 14 0 16 0 16 1500 2200 CFM 16x24x1 18x24x1 406x610x25 457x610x25 5 0 0 15 0 17 0 18 0 20 0 21 0 22 0 23 0 23 Table 12 Filter Pressure Drop Table IN W C FILTER SIZE IN MM COOLING TONS STANDARD CFM SCFM 600 700 800 900 10...

Page 48: ... wires are not in contact with refrigerant tubing or sharp metal edges 6 Check and inspect heating section before each heating season Clean and adjust when necessary 7 Check flue hood and remove any obstructions if necessary Air Filter IMPORTANT Never operate the unit without a suitable air filter in the return air duct system Always replace the filter with the same dimensional size and type as or...

Page 49: ...See Fig 19 4 Disconnect gas piping at unit gas valve 5 Remove fan partition mounting bracket 2 screws located on the left side of control compartment on the fan partition panel Slide bracket forward bottom first to remove See Fig 18 6 Remove wires connected to gas valve Mark each wire 7 Remove the mounting screw that attaches the burner rack to the unit base See Fig 18 8 Partially slide the burner...

Page 50: ...ig 22 6 Ensure that setscrew engages the flat area on the motor shaft when tightening 7 Replace grille Electrical Controls and Wiring Inspect and check the electrical controls and wiring annually Be sure to turn off the electrical power to the unit Remove access panels see Fig 19 to locate all the electrical controls and wiring Check all electrical connections for tightness Tighten all screw conne...

Page 51: ...n Items Metering Device Thermostatic Expansion Valve This metering device is a hard shutoff balance port TXV The TXV maintains a constant superheat at the evaporator exit resulting in higher overall system efficiency Pressure Switches Pressure switches are protective devices wired into control circuit low voltage They shut off compressor if abnormally high or low pressures are present in the refri...

Page 52: ... designed for HCFC and CFC refrigerants Take all necessary precautions to avoid exposure of the oil to the atmosphere Servicing Systems on Roofs with Synthetic Materials POE polyolester compressor lubricants are known to cause long term damage to some synthetic roofing materials Exposure even if immediately cleaned up may cause embrittlement leading to cracking to occur in one year or more When pe...

Page 53: ... oils S Vacuum pumps will not remove moisture from oil S Do not use liquid line filter driers with rated working pressures less than 600 psig S Do not leave Puron suction line filter driers in line longer than 72 hrs S Do not install a suction line filter drier in liquid line S POE oils absorb moisture rapidly Do not expose oil to atmosphere S POE oils may cause damage to certain plastics and roof...

Page 54: ...hown on rating plate Defective compressor Replace and determine cause Insufficient line voltage Determine cause and correct Blocked outdoor coil Determine cause and correct Defective run start capacitor Determine cause and replace Faulty outdoor fan motor or capacitor Replace Restriction in refrigerant system Locate restriction and remove Compressor operates continuously Dirty air filter Replace f...

Page 55: ...of the indoor evaporator fan motor Ensure that the supply air temperature rise is in accordance with the range on the unit nameplate Clean or replace filters Flame sense fault LED 3 flashes The IGC sensed flame that should not be present Reset unit If problem persists replace control board 4 consecutive limit switch faults LED 4 flashes Inadequate airflow to unit Check the operation of the indoor ...

Page 56: ...UPPLY VOLTAGE COMPRESSOR AMPS INDOOR EVAPORATOR FAN AMPS TEMPERATURES OUTDOOR CONDENSER AIR TEMPERATURE DB RETURN AIR TEMPERATURE DB WB COOLING SUPPLY AIR DB WB GAS HEAT SUPPLY AIR PRESSURES GAS INLET PRESSURE IN W C GAS MANIFOLD PRESSURE IN W C REFRIGERANT SUCTION PSIG SUCTION LINE TEMP REFRIGERANT DISCHARGE PSIG LIQUID TEMP VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS GAS HEAT TEMPERATURE RIS...

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