Carrier 50HS018 Installation, Start-Up And Service Instructions Manual Download Page 6 | Manualshive

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Carrier 50HS018 Installation, Start-Up And Service Instructions Manual Download Page 6

PART NUMBER

‘‘A’’

Flat

CPRFCURB001A00

8

9

[203]

CPRFCURB002A00

11

9

[279]

CPRFCURB003A00

14

9

[356]

NOTES:
1. Roof curb must be set up for unit being installed.
2. Seal strip must be applied as required for unit being installed.
3. Dimensions in [

] are in millimeters.

4. Roof curb is made of 16 gage steel.
5. Attach ductwork to curb (flanges of duct rest on curb).
6. Service clearance 4 ft on each side.

7.

Direction of airflow.

8. Insulated panels: 1-in. thick fiberglass, 1-lb density.

Fig. 6 — Roof Curb Dimensions

6

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Summary of Contents for 50HS018

Page 1: ...tion and servicing of air conditioning equipment can be hazardous due to system pressure and electrical com ponents Only trained and qualified personnel should install repair or service air conditioning equipment Untrained personnel can perform basic maintenance func tions of cleaning coils and filters All other operations should be performed by trained service personnel When working on air condit...

Page 2: ...0 6 270 50HS036 20 1 511 20 2 513 12 4 314 50HS042 20 0 509 20 3 516 12 4 314 REQ D CLEARANCES FOR SERVICING in mm Indoor Coil Access Side 30 762 Control Box Access Side 30 762 Except for NEC requirements Unit Top 36 914 Side Opposite Ducts 30 762 REQ D CLEARANCES TO COMBUSTIBLE MAT L in mm Unit Top 0 Duct Side of Unit 0 Side Opposite Ducts 0 Bottom of Unit 0 Vertical Discharge First 12 in 305 of ...

Page 3: ...13 12 9 329 50HS036 20 0 508 20 3 515 14 7 373 50HS042 19 9 506 20 4 518 14 7 373 REQ D CLEARANCES FOR SERVICING in mm Indoor Coil Access Side 30 762 Control Box Access Side 30 762 Except for NEC requirements Unit Top 36 914 Side Opposite Ducts 30 762 REQ D CLEARANCES TO COMBUSTIBLE MAT L in mm Unit Top 0 Duct Side of Unit 0 Side Opposite Ducts 0 Bottom of Unit 0 Vertical Discharge First 12 in 305...

Page 4: ...nts Unit Top 36 914 Side Opposite Ducts 30 762 REQ D CLEARANCES TO COMBUSTIBLE MAT L in mm Unit Top 0 Duct Side of Unit 0 Side Opposite Ducts 0 Bottom of Unit 0 Vertical Discharge First 12 in 305 of Supply Duct 1 25 NEC REQ D CLEARANCES in mm Between Units Control Box Side 42 1067 Unit and Ungrounded Surfaces Control Box Side 36 914 Unit and Block or Concrete Walls and Other Grounded Surfaces Cont...

Page 5: ... Unit Top 36 914 Side Opposite Ducts 30 762 REQ D CLEARANCES TO COMBUSTIBLE MAT L in mm Unit Top 0 Duct Side of Unit 0 Side Opposite Ducts 0 Bottom of Unit 0 Vertical Discharge First 12 in 305 of Supply Duct 1 25 NEC REQ D CLEARANCES in mm Between Units Control Box Side 42 1067 Unit and Ungrounded Surfaces Control Box Side 36 914 Unit and Block or Concrete Walls and Other Grounded Surfaces Control...

Page 6: ...lled 2 Seal strip must be applied as required for unit being installed 3 Dimensions in are in millimeters 4 Roof curb is made of 16 gage steel 5 Attach ductwork to curb flanges of duct rest on curb 6 Service clearance 4 ft on each side 7 Direction of airflow 8 Insulated panels 1 in thick fiberglass 1 lb density Fig 6 Roof Curb Dimensions 6 ...

Page 7: ... all 4 sides of the unit Install a 6 in gravel apron in front of outdoor coil air inlet to prevent obstruction of air flow by grass or shrubs Do not secure the unit to the slab except when required by local codes In areas where pro longed subfreezing temperatures or snowfall occur increase clearance to 12 to 18 in by constructing an angle iron frame to support unit See Fig 7 for recommended frame ...

Page 8: ... 8 2 Position paint protectors and foam strips between screws and painted surface of unit Tighten screws until they make contact with the paint protectors 3 Secure device or hook of sufficient strength to hole in bracket as shown in detail A of Fig 8 4 If wood top is available use it for a spreader bar to pre vent straps from damaging unit If wood top is not avail able use spreader bars of suffici...

Page 9: ... in 18 18 18 18 20 20 20 Motor Hp 1 8 1 4 1 4 1 4 1 4 1 3 1 3 OUTDOOR COIL Rows Fins in 2 17 2 17 2 17 2 17 2 17 2 17 2 17 Face Area sq ft 5 7 5 7 5 7 6 7 6 7 8 2 8 2 FILTER SIZE in Throwaway 20x20 20x20 20x24 24x24 24x24 24x30 24x30 Operating charge listed on unit nameplate Recommended field supplied filters are 1 in thick NOTICE TO RIGGERS Hook rigging shackles through holes in lifting brackets ...

Page 10: ... electric heat is installed use fire proof canvas or similar heat resistant material con nector between ductwork and unit discharge connec tion If flexible duct is used insert a sheet metal sleeve inside duct Heat resistant duct connector or sheet metal sleeve must extend 24 in from electric heater element Size ductwork for cooling air quantity cfm The mini mum air quantity for proper electric hea...

Page 11: ... edge and sharp knife cut the insulation around the perimeter of the cover Remove the screws securing the cover to the basepan and slide out the cover Fig 19 Discard the cover Install filler bracket re moved in Step 7 if any 10 If unit ductwork is to be attached to vertical opening flanges on the unit basepan jackstand applications only do so at this time 11 It is recommended that the basepan insu...

Page 12: ...door Blower Access Panel DEFROST BOARD CONTACTOR RELAY Fig 16 Fan Motor Leads REMOVE Fig 17 Blower Shelf and Housing Fig 18 Basepan Insulation Over Vertical Discharge Opening Fig 19 Insulation and Cover Removed from Vertical Discharge Opening 12 ...

Page 13: ...TES 1 An accessory duct cover is available as an alternative to field fabrication 2 Construct duct cover out of 22 gage sheet metal 3 Dimensions in are in millimeters Fig 20 Field Fabricated Duct Cover 13 ...

Page 14: ...lectrical fault should occur This ground may consist of an electrical wire connected to the unit ground lug in the control compartment or conduit ap proved for electrical ground when installed in accor dance with NEC National Electrical Code ANSI American National Standards Institute NFPA latest edi tion in Canada Canadian Electrical Code CSA C22 1 and local electrical codes Failure to adhere to t...

Page 15: ...M Indoor Fan Motor LRA Locked Rotor Amps MCA Minimum Circuit Amps MOCP Maximum Overcurrent Protection fuses or HACR type circuit breaker NEC National Electrical Code OFM Outdoor Fan Motor RLA Rated Load Amps Carrier Scroll Compressor Copeland Scroll Compressor NOTES 1 In compliance with NEC requirements for multimotor and combi nation load equipment refer to NECArticles 430 and 440 the over curren...

Page 16: ...unit Route the thermostat leads through grommeted hole provided in unit into unit control power splice box See Fig 23 Connect thermostat leads to unit control power leads as shown in Fig 26 The unit transformer supplies 24 v power for complete system including accessory electrical heater An automatic reset circuit breaker is provided in the 24 v circuit see the caution label on the transformer or ...

Page 17: ...eed as follows a Shut off electrical power to unit b Relieve all pressure from system using both high and low pressure ports Use accepted methods to recover refrigerant c Cut component connecting tubing with tubing cut ter and remove component from unit d Carefully unsweat remaining tubing stubs when necessary Oil can ignite when exposed to torch flame Use the Start Up Checklist supplied at the en...

Page 18: ... be reversed to correct rotation When turning back wards scroll compressors emit elevated noise lev els and the difference between compressor suction and discharge pressures may be dramatically lower than normal CHECKINGANDADJUSTING REFRIGERANT CHARGE The refrigerant system is fully charged with R 22 refrig erant and is tested and factory sealed NOTE Adjustment of the refrigerant charge is not req...

Page 19: ... 4 12 2 13 0 16 8 20 6 24 4 27 2 29 9 32 7 33 4 34 1 80 SPH 9 4 9 9 10 3 10 7 14 6 18 5 22 3 25 1 27 9 30 6 31 9 33 1 85 SPH 8 4 8 4 12 4 16 3 20 3 23 1 25 8 28 6 30 3 32 1 90 SPH 5 9 10 0 14 1 18 3 21 0 23 8 26 5 28 8 31 0 95 SPH 7 6 11 9 16 2 19 0 21 7 24 5 27 2 30 0 100 SPH 6 2 10 2 14 1 17 4 20 7 23 9 26 4 29 0 105 SPH 8 5 12 1 15 9 19 6 23 4 25 6 27 9 110 SPH 6 2 8 6 12 8 17 1 21 3 24 1 26 9 ...

Page 20: ...5 14 9 22 3 24 8 27 3 29 8 30 3 30 7 85 SPH 6 8 13 5 20 3 23 3 26 3 29 3 29 2 29 2 90 SPH 6 1 12 2 18 3 21 2 24 2 27 3 27 4 27 6 95 SPH 5 4 10 8 16 2 19 2 22 2 25 2 25 6 26 1 100 SPH 5 2 10 4 15 6 18 6 21 6 24 6 25 4 26 1 105 SPH 5 0 10 1 15 1 18 1 21 1 24 1 25 1 26 0 110 SPH 8 7 13 0 16 0 19 0 22 0 24 0 26 0 115 SPH 7 3 11 0 14 0 17 0 20 0 23 0 26 0 LEGEND Ewb Entering Wet Bulb SPH Superheat at C...

Page 21: ... at Compressor F Do not attempt to charge system under these conditions refrig erant slugging may occur Table 5 Required Suction Tube Temperature F SUPERHEAT TEMP F SUCTION PRESSURE AT SERVICE PORT psig 61 5 64 2 67 1 70 0 73 0 76 0 79 2 82 4 85 7 0 35 37 39 41 43 45 47 49 51 2 37 39 41 43 45 47 49 51 53 4 39 41 43 45 47 49 51 53 55 6 41 43 45 47 49 51 53 55 57 8 43 45 47 49 51 53 55 57 59 10 45 4...

Page 22: ...ts power to the compressor when either the current or internal tempera ture become excessive and automatically resets when the internal temperature drops to a safe level This compressor overload may require up to 60 minutes or longer to reset therefore if the internal overload is sus pected of being open disconnect the electrical power to the unit and check the circuit through the overload with an...

Page 23: ...1280 1170 1060 042 Low Watts 730 700 680 645 615 580 535 490 430 Cfm 1620 1590 1550 1510 1460 1390 1310 1210 1050 High Watts 850 800 750 700 650 610 Cfm 1780 1670 1550 1400 1230 1050 048 Low Watts 1080 1040 1020 970 910 840 785 730 680 620 540 Cfm 2100 2090 2080 2060 1980 1900 1810 1710 1590 1450 1200 High Watts 1230 1190 1125 1060 1010 940 880 820 760 710 660 Cfm 2390 2340 2280 2210 2150 2030 190...

Page 24: ... 1280 1170 1060 042 Low Watts 730 700 680 645 615 580 535 490 430 Cfm 1620 1590 1550 1510 1460 1390 1310 1210 1050 High Watts 850 800 750 700 650 610 Cfm 1780 1670 1550 1400 1230 1050 048 Low Watts 1080 1040 1020 970 910 840 785 730 680 620 540 Cfm 2100 2090 2080 2060 1980 1900 1810 1710 1590 1450 1200 High Watts 1230 1190 1125 1060 1010 940 880 820 760 710 660 Cfm 2390 2340 2280 2210 2150 2030 19...

Page 25: ...095 2100 0 108 2300 0 123 Table 9 Accessory Electric Heater Pressure Drop in wg HEATER kW CFM 600 800 1000 1200 1400 1600 1800 2000 2200 5 20 0 030 0 033 0 037 0 042 0 047 0 052 0 060 0 067 0 075 Table 10 Filter Pressure Drop in wg UNIT SIZE 50HS FILTER SIZE in CFM 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 018 024 20 x 20 0 05 0 07 0 08 0 10 0 12 0 1...

Page 26: ...h converging circuits Refrigerant leaves the outdoor coil by way of the strainer and the check valve in the cooling liquid line 2 The refrigerant then feeds the indoor coil through the Acutrol metering device on each circuit 3 Each circuit evaporates the refrigerant and the circuits are com bined in the indoor coil header with some of the circuits flowing through the check valve 4 The refrigerant ...

Page 27: ... directed through subcooling circuits and out to the strainer and the check valve in the heating liquid line 2 The refrigerant then feeds the outdoor coil through the Acutrol metering device on each circuit 3 Each circuit evaporates the refrigerant and the circuits are com bined in the outdoor header with some of the circuits flowing through the check valve 4 The refrigerant then flows through the...

Page 28: ... cleaning and con densate drain pan inspection and cleaning Only qualified service personnel should perform mainte nance and service procedures that require unit top removal Refer to the following top removal procedures 1 Remove 7 screws on unit top cover surface Save all screws 2 Remove 4 screws on unit top cover flange Save all screws 3 Lift top from unit carefully Set top on edge and make sure ...

Page 29: ... also clear Outdoor Fan Keep the condenser fan free from all obstructions to en sure proper cooling operation Never place articles on top of the unit Damage to unit may result 1 Remove screws at bottom of outdoor air intake grille and remove plastic grille 2 Inspect the fan blades for cracks or bends 3 If fan needs to be removed loosen the setscrew and slide the fan off the motor shaft 4 When repl...

Page 30: ...pressor motor burned out seized or internal overload open Determine cause Replace compressor Defective run capacitor overload or PTC positive temperature coefficient thermistor Determine cause and replace One leg of 3 phase power dead Replace fuse or reset circuit breaker Determine cause Low input voltage 20 low Determine cause and correct Three phase scroll compressor size 048 and 060 units only ...

Page 31: ... between defrost cycles Cool High heat load Check for source and eliminate Compressor valves leaking Replace compressor Reversing valve hung up or leaking internally Replace valve Refrigerant overcharged Recover excess refrigerant Suction pressure too low Cool Dirty air filter Replace filter Heat Outdoor coil frosted Move timer on control board to 30 minutes between defrost cycles Low refrigerant ...

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Page 34: ...cturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations Book 1 4 Tab 5a 5a PC 111 Catalog No 565 041 Printed in U S A Form 50HS 9SI Pg 34 2 97 Replaces 50HS 8SI ...

Page 35: ......

Page 36: ...TART UP ELECTRICAL SUPPLY VOLTAGE L1 L2 L2 L3 L3 L1 COMPRESSOR AMPS L1 L2 L3 INDOOR FAN AMPS TEMPERATURES OUTDOOR AIR TEMPERATURE DB DRY BULB RETURN AIR TEMPERATURE DB WB WET BULB COOLING SUPPLY AIR ELECTRIC HEATER SUPPLY AIR PRESSURES COOLING REFRIGERANT SUCTION PSIG REFRIGERANT DISCHARGE PSIG M VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS ON PAGES 19 21 M VERIFY 3 PHASE SCROLL COMPRESSOR 048 ...

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