Carrier 48SD018 Installation Instructions Manual Download | Manualshive

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Summary of Contents for 48SD018

Page 1: ...justments 19 Cooling Sequence of Operation 19 MAINTENANCE 23 25 Air Filter 23 Indoor Blower and Motor 23 Flue Gas Passageways 23 Induced Draft Combustion Air Blower 24 A99338 Fig 1 Unit 48SD Low NOx Model Available Limit Switch 24 Burner Ignition 24 Main Burners 24 Outdoor Coil Indoor oil Condensate Drain Pan 24 Outdoor Fan 25 Electrical Controls and Wiring 25 Refrigerant Circuit 25 Indoor Airflow...

Page 2: ...heck Equipment IDENTIFY UNIT The unit model number and serial number are stamped on the unit information plate Check this information against shipping papers INSPECT SHIPMENT Inspect for shipping damage while unit is still on shipping pallet If unit appears to be damaged or is torn loose from its anchorage have it examined by transportation inspectors before removal Forward claim papers directly t...

Page 3: ...GE ORPOS IE I GC S 3556 _14 oR BOTTOM Of UNiT BOO OOO FiOE PANEL 9i4 4 i36 OOi NEC REOUIRED CLEARANCE _ LIMETERS IN RETW6EN URNS PO_ER ENTRY SiD6 IR668 142D0 UNIT AND _RGROUNDED SURFACES POWER ENTRY SIDE 914 O i36 OR MN_ AND BLOCK OR CO_CREiE WALLS ANG OTHER GROUNDED SURFACES POWER ENTRY SiDE 1066 8 _4200 REO_RED CLEARANCE FOR OPERATION AIED SERE_IN6 _IL _ETERS IN EVAP COIL ACCESS SIGE 9140 _36 oR...

Page 4: ...6 DO NCC REOUIRBO CLEARANCES L M I H WI S 8_ R HTR 68 n66 6 4F _ T At U GROW B UR AC S CWR q 914 36 00 T Af8 800 O O P _ A 8 q O R U Oi S I iO_i I HY 6 1 i06_ 8 I I REOUIRED CLEARANCE FOR OPERATION AND SERVICING I M F S f OL ASS I E 014 0 fl I 0 Ol_ E R SI E I 6 8 42 0 6 I I E N i O I I I t411 I 6 I 9 8 i I S Of 18S tC S 4 0 36 001 8UCT A I 08 i2 68 _ II t 4W DIST NCES IF U T S PL CED LESS TH_ 384...

Page 5: ...6 3 18 411 CPRFCURBOO9AOO 14 356 16 3 16 411 Roof curb lnust be set tip for ullit being installed C IN MM 16 1 2 419 16 1 2 419 17 3 8 441 17 3 8 441 D IN MM 28 3 4 730 28 3 4 730 40 1 4 1022 40 1 4 1022 E IN MM 30 3 8 771 30 3 8 771 41 15 16 1065 41 15 18 1065 F IN MM 44 5 16 1126 44 5 16 1126 44 7 16 1129 44 7 16 1129 A05308 G iN MM 45 15 16 1167 45 15 16 1167 48 1 18 1169 46 1 18 1169 2 Seat st...

Page 6: ...gging bracket is engineered and designed to be installed only on Small Packaged Products This bracket is to be used to rig lift a Small Packaged Product onto roofs or other elevated structures Prior to initial use and at monthly intervals all rigging equipment and straps should be visually inspected for any damage evidence of wear structural deformation or cracks Particular attention should be pai...

Page 7: ...8 3_38 2 88 3 33 2 50 2 48 2 50 2 48 246 3 46 2 48 3 46 20x20x1 24x30x1 508x508x25 610x752x25 UNIT SIZE 48SD NOMINAL CAPACITY ton OPERATING WEIGHT Ib kg COMPRESSORS REFRIGERANT R 22 Quantity Ib kg HEI RIGERANT METERING DEVICE Orifice ID in CONDENSER COIL Rows Fins in Face Area sq ft CONDENSER PAN Nominal Cfm Diameter in Motor Hp Rpm EVAPORATOR COIL Rows Fins in Face Area sq ft EVAPORATOR BLOWER No...

Page 8: ...y from the unit TRAP OUTLET C00009 Fig 7 Condensate Trap Connect a drain tube using a minimum of 3 4 in PVC or 3 4 in copper pipe all field supplied at tire outlet end of the 2 in trap Do not undersize the tube Pitch the drain tube downward at a slope of at least 1 in 25 mm for every 10 ft 3 m of horizontal run Be sure to check the drain tube for leaks Step 7 Install Flue Hood The flue assembly is...

Page 9: ... Teflon tape 4 Install sediment trap in riser leading to heating section See Fig 8 This drip leg functions as a trap for dirt and condensate 5 Install an accessible external manual main shutoffvalve in gas supply pipe within 6 ft 1 8 m of heating section 6 Install ground joint union close to heating section between unit manual shutoff and external manual main shut off valve 7 Pressure test all gas...

Page 10: ...r up unit NOTE The design and installation of the duct system must be in accordance with the standards of the NFPA for installation of nonresidence type air conditioning and ventilating systems NFPA 90A or residence type NFPA 90B and or local codes and ordinances 7 SUPPLY RETURN VENT HOOD DUCT DUCT SHIPPING OPENING OPENING LOCATION A05143 Fig 9 Supply and Return Duct Opening DUCT COVERS REMOVED Fi...

Page 11: ...on the unit over the high voltage inlet hole when the standard power and low voltage entry points are used See Fig 3 and 4 for acceptable location See unit wiring label and Fig 11 for reference when making high voltage connections Proceed as follows to complete the high voltage connections to the unit Single phase units 1 Run the high voltage L1 L2 and ground lead into the control box 2 Connect gr...

Page 12: ...t Up Checklist supplied at the end of this book and proceed as follows to inspect and prepare the unit for initial start up 1 Remove access panel 2 Read and follow instructions on all DANGER WARNING CAUTION and INFORMATION labels attached to or shipped with unit 3 Make the following inspections a Inspect for shipping and handling damage such as broken lines loose parts disconnected wires etc b Ins...

Page 13: ...e has been established The evaporator fan will turn off 45 sec after the thermostat has been satisfied CHECK GAS INPUT Check gas input and manifold pressure after unit start up See Table 3 If adjustment is required proceed as follows The rated gas inputs shown in Table 3 are for altitudes from sea level to 2000 ft above sea level These inputs are based on natural gas with a heating value of 1050 B...

Page 14: ... gas unit are sized for the unit rated input when the manifold pressure reading matches the level specified in Table 3 Proceed as follows to adjust gas input on a propane gas unit 1 Turn off gas to unit 2 Remove pipe plug on manifold and connect manometer See Fig 13 3 Turn on gas to unit 4 Remove cover screw over regulator adjustment screw on gas valve 5 Adjust regulator adjustment screw to the co...

Page 15: ... Ji I i E g g ii i c sc ...

Page 16: ..._d I i I s sl_ 4 c D _ _kJ k lkJ I _ U IS i i _ IS L 1 CI i OI d _ri IMI IS i _ 5_1 3 LIC S j _ _ c_ s i i sill _ l J J C I J d x i _ L x i o 0 I 8q 500S 0 g g ...

Page 17: ...o ...

Page 18: ...d The evaporator fan will continue to run for 30 sec 3 When using an auto changeover room thermostat place both SYSTEM and FAN switches in AUTO positions Observe that unit operates in Heating mode when temperature control is set to call for heating above room temperature and operates in Cooling mode when temperature control is set to call for cooling below room temperature IMPORTANT Three phase sc...

Page 19: ...e 7 for filter pressure drop and Table 9 for wet coil pressure drop NOTE Be sure that all supply and return air grilles are open free from obstructions and adjusted properly ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death Disconnect electrical power to the unit and install lockout tag before changing blower speed Airflow can be changed by changing th...

Page 20: ...0 37 34 32 1606 42 39 36 33 1675 43 41 38 35 1744 45 42 39 37 1820 47 44 41 38 1889 48 46 43 40 1965 50 47 44 42 2048 52 49 46 43 2130 53 51 48 45 2213 55 52 49 47 2282 57 54 51 48 2386 58 56 53 50 2475 60 57 54 52 Table 6A Coollng Charging Chart 024 through 060 only ODTemp 45 55 65 75 85 95 105 115 125 Sucti0nLineTem_ SuctionLinePressurePS P_ G _ 52 54 56 59 61 64 67 70 73 76 79 82 85 89 92 51 55...

Page 21: ... 1244 1162 1081 1005 897 Heating Rise OF 51 54 58 62 67 NA Watts 641 527 623 509 601 588 High CFM 1562 1288 1205 1119 1033 935 Heating Rise OF 50 52 56 60 65 NA Watts 434 428 422 403 404 390 Low CFM 1282 1241 1206 1160 1109 1040 Heating Rise OF 35 36 37 39 41 43 Watts 560 548 555 526 511 496 0 7 0 8 NA NA NA NA 286 280 423 263 NA NA 357 345 769 647 39 46 447 435 970 855 31 35 286 280 423 263 NA NA...

Page 22: ...ter pressure drop and wet coil pressure drop to obtain external static pressure available for ducting External Static Pressure in we 0 4 0 5 0 6 0 7 0 8 0 9 584 567 548 528 503 480 1461 1414 1361 1320 1250 1177 67 69 NA NA NA NA 711 690 665 639 607 572 1687 1645 1595 1530 1449 1355 58 59 61 64 67 NA 887 858 827 804 767 748 1944 1876 1811 1735 1647 1555 50 52 54 56 59 63 736 722 705 684 658 616 182...

Page 23: ...y 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 originally installed See Table 1 for recommended filter sizes Inspect air filter s at least once each month and replace throwaway type or clean cleanable type at least twice during each cooling season and twice during the hea...

Page 24: ...e the main burner flames and adjust if necessary Removal of Burner Assembly To remove the burner assembly for servicing 1 Shut off main gas valve 2 Shut off power to unit and install lockout tag 3 Remove unit access panel See Fig 19 4 Disconnect gas piping at unit gas valve 5 Remove wires connected to gas valve Mark each wire 6 Remove ignitor and sensor wires at the ignitor module 7 Remove the mou...

Page 25: ...g fan blade position blade so that the hub is 1 8 in away from the motor end 1 8 in of motor shaft will be visible See Fig 12 6 Ensure that setscrew engages the flat area on the motor shaft when tightening 7 Replace grille EXPLOSION PERSONAL INJURY HAZARD Failure to follow this warning could result in property damage personal injury or death System under pressure Relieve pressure and recover all r...

Page 26: ... heat load Compressor valves leaking Refrigerant overcharged Dirty air filter Low refrigerant charge Metering device or low side restricted Insufficient evaporator airflow Temperature too low in conditioned area Outdoor ambient below 55 F Filter drier restricted REMEDY Call power company Replace fuse or reset circuit breaker Replace component Determine cause and correct Check wiring diagram and re...

Page 27: ...fan motor Ensure LED 2 flashes High temperature limit switch is open that the supply air temperature rise is in accordance with the range on the unit nameplate Clean or replace filters Flame sense fault The IGC sensed flame that should not be present Reset unit If problem persists replace control board LED 3 flashes 4 consecutive limit switch Check the operation of the indoor evaporator fan motor ...

Page 28: ...TRICAL SUPPLY 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 GAS MANIFOLD PRESSURE REFRIGERANT SUCTION REFRIGERANT DISCHARGE VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS GAS HEAT TEMPERATURE RISE TEMPERATURE RISE See Literature RANGE MEASUR...

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