Table of Contents
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Installation, Start-Up, and Operating Instructions
NOTE: Read the entire instruction manual before starting the
installation.
This symbol → indicates a change since the last issue.
SAFETY CONSIDERATIONS .....................................................1
Introduction ....................................................................................2
RECEIVING AND INSTALLATION ..........................................2
Check Equipment......................................................................2
IDENTIFY UNIT ................................................................2
INSPECT SHIPMENT ........................................................2
Provide Unit Support ................................................................2
ROOF CURB & SLAB MOUNT.......................................2
Provide Clearances....................................................................2
Select and Install Ductwork .....................................................2
Rig and Place Unit....................................................................3
INSTALLATION ................................................................5
Connect Condensate Drain .......................................................6
Install Duct Connections ..........................................................7
CAL) DISCHARGE-ECM UNITS (048-060).................10
Install Electrical Connection ..................................................12
TIONS................................................................................14
PRE-START-UP ..........................................................................19
START-UP ...................................................................................19
CHECK FOR REFRIGERANT LEAKS..........................19
START UP AND MAKE ADJUSTMENTS....................20
CHECKING COOLING CONTROL OPERATION .......20
CHECKING HEATING CONTROL OPERATION........20
CHARGE ...........................................................................20
MENTS ..............................................................................23
For 208/230v-PSC Blower Motor.....................................23
For 208/230v-ECM Blower Motor ...................................23
COOLING SEQUENCE OF OPERATION.....................23
HEATING SEQUENCE OF OPERATION .....................25
MAINTENANCE.........................................................................25
AIR FILTER......................................................................25
UNIT TOP REMOVAL ....................................................26
INDOOR BLOWER AND MOTOR ................................26
DRAIN PAN......................................................................27
OUTDOOR FAN...............................................................30
ELECTRICAL CONTROLS AND WIRING ..................30
REFRIGERANT CIRCUIT...............................................30
INDOOR AIRFLOW ........................................................31
METERING DEVICE - ACUTROL DEVICE .............31
LIQUID LINE STRAINER ..............................................31
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 6
PC 101
Catalog No. 535-00101
Tab
6 8
50HX Sizes 024-060
Printed in U.S.A.
Single Packaged Heat Pump Units
Troubleshooting............................................................................34
Start-Up Checklist ........................................................................36
NOTE TO INSTALLER - Before the installation, READ THESE
INSTRUCTIONS CAREFULLY AND COMPLETELY. Also,
make sure the User's Manual and Replacement Guide are left with
the unit after installation.
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components. Only
trained and qualified personnel should install, repair, or service
air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of
cleaning coils and filters. All other operations should be performed
by trained service personnel. When working on air-conditioning
equipment, observe precautions in the literature, tags, and labels
attached to the unit, and other safety precautions that may apply.
Follow all safety codes. Wear safety glasses and work gloves. Use
quenching cloth for unbrazing operations. Have fire extinguisher
available for all brazing operations. Consult a qualified installer or
service agency for information or assistance. The qualified in-
staller or agency must use only factory-authorized kits or acces-
sories when modifying this product.
Fig. 1-Unit 50HX with Optional Base Rails
Form 50HX-5SI
50HX
Pg 1
7-03
Replaces: 50HX-4SI
C95002
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Table of Contents
Related Manuals for Carrier 50HX
Summary of Contents for Carrier 50HX
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Page 1: Table Of Contents
For 208/230v-ECM Blower Motor ........23 COOLING SEQUENCE OF OPERATION.....23 HEATING SEQUENCE OF OPERATION .....25 C95002 MAINTENANCE.................25 AIR FILTER..............25 Fig. 1—Unit 50HX with Optional Base Rails UNIT TOP REMOVAL ............26 INDOOR BLOWER AND MOTOR ........26 OUTDOOR COIL, INDOOR COIL, AND CONDENSATE DRAIN PAN..............27 OUTDOOR FAN...............30 ELECTRICAL CONTROLS AND WIRING ....30... -
Page 2: Introduction
The design and installation of the duct system must be in accordance with the standards of the NFPA (National Fire Protec- The 50HX units (see Fig. 1) are fully self-contained, and designed tion Association) for installation of nonresidence-type air condi- for outdoor installation. -
Page 3: Rig And Place Unit
C95003 CORNER WT CENTER OF GRAVITY UNIT WEIGHT LB/KG IN/MM UNIT ELECTRICAL CHARACTERISTICS 50HX024 208/230-1-60 57/26 69/31 75/34 56/25 20.4/519 21.1/540 11.2/286 50HX030 208/230-1-60 56/25 87/40 74/34 71/32 20.3/518 21.5/547 11.2/286 Fig. 2— 50HX024-030 Unit Dimensions (without base rails) conditioned spaces. Follow latest Sheet Metal and Air Con- place. - Page 4 C95004 CORNER WT CENTER OF GRAVITY UNIT WEIGHT LB/KG IN/MM UNIT ELECTRICAL CHARACTERISTICS 50HX024 208/230-1-60 62/28 74/34 80/36 61/28 20.2/515 21.3/541 13.8/351 50HX030 208/230-1-60 61/28 92/42 79/36 76/35 20.2/514 21.5/547 13.8/351 Fig. 3— 50HX024-030 Unit Dimensions (with base rails) 2. Position paint protectors and foam strips between screws and painted surface of unit.
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Page 5: Installation
C95005 CORNER WT CENTER OF GRAVITY UNIT WEIGHT LB/KG IN/MM UNIT ELECTRICAL CHARACTERISTICS 50HX036 208/230-1-60 46/21 103/47 81/37 86/39 21.2/539 20.4/520 13.6/347 50HX042 208/230-1-60 46/21 103/47 81/37 86/39 21.2/539 20.4/520 13.6/547 50HX048 208/230-1-60 89/40 81/37 113/51 76/35 19.7/500 20.5/522 15.0/381 50HX060 208/230-1-60, 92/42... -
Page 6: Connect Condensate Drain
C95006 CORNER WT CENTER OF GRAVITY UNIT WEIGHT LB/KG IN/MM UNIT ELECTRICAL CHARACTERISTICS 50HX036 208/230-1-60 51/23 108/49 86/39 91/41 21.0/535 20.5/521 16.4/418 50HX042 208/230-1-60 51/23 108/49 86/39 91/41 21.0/535 20.5/521 16.4/418 50HX048 208/230-1-60 94/43 86/39 118/54 81/37 19.6/498.3 20.6/524 17.3/440 50HX060 208/230-1-60, 97/44... -
Page 7: Install Duct Connections
C95007 ODS CATALOG NUMBER IN. (MM) CPRFCURB001A00 8 (203) Flat CPRFCURB002A00 11 (279) Curb CPRFCURB003A00 14 (356) Fig. 6— Roof Curb Dimensions pan from overflowing. Prime the trap with water. Connect a drain connector between ductwork and unit discharge connection. If tube using a minimum of 3/4-in. -
Page 8: Configuring Units For Downflow (Verti- Cal) Discharge-Standard Units (024-042)
38.2 16.8 34.1 16.9 38.2 16.8 34.1 Fig. 7— 50HX Rigging Instructions MAXIMUM ALLOWABLE DIFFERENCE (in.) C99065 Fig. 8—Unit Leveling Tolerances 4. See the following caution. Using remaining holes in duct CONFIGURING UNITS FOR DOWNFLOW (VERTICAL) flanges as templates, drill the remaining holes with the no. 26 DISCHARGE-STANDARD UNITS (024–042) - Page 9 INDOOR THERMOS TAT RETURN FR OM TOP COVER PO WE R SOURCE DISCONNECT PER NEC C95013 Fig. 9—Typical Unit Installation REAR SIDE OF UNIT 984 mm (38 3/4”) UNIT OUTLINE 933 mm (36 3/4”) SIDE OF UNIT WITH DUCT CONNECTIONS 1110 mm (43 11/16”) 1161 mm...
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Page 10: Configuring Units For Downflow (Verti- Cal) Discharge-Ecm Units (048-060)
959 mm (37 3/4 in.) 305 mm (12 in.) TO 610 mm (24 in.) (4) REQ. 1010 mm (39 3/4 in.) (2) REQ. 909 mm (35 3/4 in.) (2) REQ. 38 mm (1 1/4 in.) 406 mm (16 in.) (8) REQ. 1060 mm (41 3/4 in.) NOTES:... - Page 11 C95015 Fig. 13—Removing Insulation and Vertical Duct Cover INDOOR BLOWER ACCESS PANEL (REMOVE SCREWS) C950016 Fig. 14—Indoor Blower Access Panel 13. Orient blower housing for vertical airflow (blower motor 6. Disconnect the plug assemblies from the indoor-fan motor (See Fig. 15 & 17). adjacent to horizontal duct opening) and slide into vertical opening making sure the flanges on the blower side plates 7.
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Page 12: Install Electrical Connection
BLOWER SHELF FILLER BRACKET RACEWAY PLUG ASSEMBLIES HORIZONTAL DUCT OPENING C950010 Fig. 15—Converting Blower Assembly to Vertical Airflow FILLER BRACKET REMOVE C95017 Fig. 16—Blower Shelf and Housing Step 8—Install Electrical Connection The unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of personal injury if an electrical fault should occur. - Page 13 RELAY C95017 Fig. 17—Control Box Detail View 1” (25mm) MIN. TRAP OUTLET 2” (50mm) MIN. C99013 Fig. 18–Condensate Trap Table 1—Physical Data—Unit 50HX UNIT SIZE NOMINAL CAPACITY (ton) 2-1/2 3-1/2 OPERATING WEIGHT (lb.) Without Base Rails WIth Optional Rails COMPRESSOR...
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Page 14: High-Voltage & Control-Voltage Connections
" 5" [495] [127] NOTES: 1. Do not drill more than 1/2-in into shaded area. 2. Dimensions in [ ] are in mm. C95012 Fig. 19—Area Not To Be Drilled high-voltage leads through the knockout on the duct panel (see Fig. -
Page 15: Special Procedures For 208-V Operation
9 11/16” (245) 21 9/16” (547) 11/32” DIA (8 Places/Holes) 14 11/16” (372) 13 3/4” (348) 3 3/4” (94) 11/16” (17) TYP 9/32” (7) TYP 10 5/8” (270) 19” (482) 31 3/16” (792) 1 3/4” (43) 0 22-GAGE SHEET 4 ADHESIVE-BACKED SPONGE RUBBER METAL COVER (SEE ABOVE) SEAL STRIPS-1/8”... - Page 16 HIGH VOLTAGE POWER ENTRY (KNOCKOUT) 2 DIA. 1 1/8 DIA. 1 3/8 DIA. 2 DIA. 7/8 DIA. CONTROL POWER ENTRY* *Knockout on rectangular-duct panel units; entry hole on round-duct panel units. NOTE: For rectangular duct knockout sizes, see Fig. 2-9. C95036 Fig.
- Page 17 → Table 3—Electrical Data—50HX DUAL-POINT VOLTAGE ELECTRIC SINGLE-POINT COMPRESSOR OFM IFM POWER SUPPLY RANGE HEAT POWER SUPPLY (INCLUDING UNIT ONLY) UNIT Heater Unit 50HX Single- Only Only Heater SIZE V-PH Point Dual- Heater Unit Dual- Unit Single- Only (–SERIES, (60 HZ)
- Page 18 EXAMPLE: Supply voltage is 460-3-60. AB = 452 v LEGEND BC = 464 v AC = 455 v — Full Load Amps — Locked Rotor Amps 452 + 464 + 455 ® Average Voltage = — Minimum Circuit Amps MOCP — Maximum Overcurrent Protection 1371 —...
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Page 19: Pre-Start-Up
GROUND LUG (IN SLPICE BOX) GROUND LEAD SINGLE-PHASE CONNECTIONS TO DISCONNECT PER NEC 3-PHASE CONNECTIONS NOTE: Use copper wire only. LEGEND NEC – National Electrical Code Field Wiring Splice Connections C99057 Fig. 24—High-Voltage Connections PRE-START-UP d. Ensure electrical wiring does not contact refrigerant tubes or sharp metal edges. -
Page 20: Start Up And Make Adjustments
down when control setting is satisfied and that indoor blower shuts down after fan time delay expires. 3. When using an auto-changeover room thermostat, place both 1/2 IN. MAX SYSTEM and FAN switches in AUTO positions. Observe that FR OM FAN DECK unit operates in heating mode when temperature control is set to “call for heating”... - Page 21 C95037 Fig. 26—Wiring Diagram–024 to 042 (208/230-60-1)
- Page 22 C95038 Fig. 27—Wiring Diagram–048 to 060 (208/230-60-1 with ECM Indoor)
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Page 23: Indoor Airflow And Airflow Adjustments
FOR 208/230V-ECM BLOWER MOTOR contacts which provide continuous power to the indoor (evapora- To configure the 50HX 048-60 unit, move the 5 Easy Select board tor) fan motor (IFM). Moving the FAN switch back to the AUTO. wires to the terminals which control the airflow. Refer to the Easy position, providing there is not a call for cooling, deenergizes the Select interface board (Fig. - Page 24 No Delay Option Used for servicing or when other components are used to (Terminal 2) perform the delay function 30-Sec Off Delay Preset factory setting for 50HX units (Terminal 3) 45-Sec Off Delay Enhances system efficiency (Terminal 4) compressor starts. Energizing the contactor closes the normally- thermostat.
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Page 25: Heating Sequence Of Operation
terminals of the thermostat, deenergizing the compressor and MAINTENANCE OFM. The indoor fan remains energized for the delay timing. To ensure continuing high performance, and to minimize the possibility of premature equipment failure, periodic maintenance NOTE: Once the compressor has started and then stopped, it must be performed on this equipment. -
Page 26: Unit Top Removal
1. Do not operate the unit at a cooling airflow that is less than 350 cfm for each 12,000 Btuh of rated cooling capacity. Indoor coil frosting may occur at airflows below this point. 2. Dashes indicate portions of table that are beyond the blower motor capacity or are not recommended. Table 9—048 & 060 ECM Airflow (CFM) FAN ONLY COOLING UNIT 50HX (CFM) (CFM) 1400 1600 1750... -
Page 27: Outdoor Coil, Indoor Coil, And Condensate Drain Pan
Table 10—Wet Coil Pressure Drop AIRFLOW PRESSURE DROP UNIT SIZE (CFM) (IN. WG) 0.039 0.058 0.075 0.088 0.088 1000 0.095 1200 0.123 1000 0.068 1200 0.088 1400 0.108 1600 0.123 1000 0.048 1200 0.069 1400 0.088 1600 0.102 1400 0.068 1550 0.073 1600... - Page 28 Table 13A—Superheat Charging Table, Unit 024–311 EVAP AIR – CFM TEMP (F) AIR ENT EVAP AIR – Ewb (F) COND — — 24.0 27.4 30.8 31.1 31.5 30.5 29.5 29.2 28.9 — — 19.5 24.4 29.3 29.9 30.4 29.5 28.6 28.2 27.8 —...
- Page 29 Table 13D—Superheat Charging Table, Unit 036 EVAP AIR – CFM TEMP (F) 1150 AIR ENT EVAP AIR – Ewb (F) COND 28.6 28.6 30.4 32.1 33.3 34.3 33.4 32.0 30.7 29.8 28.9 23.8 23.8 25.5 27.2 29.5 32.3 32.0 30.9 29.7 28.6 27.6...
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Page 30: Outdoor Fan
Table 13G—Superheat Charging Table, Unit 048–311 EVAP AIR – CFM TEMP (F) 1550 AIR ENT EVAP AIR – Ewb (F) COND 39.4 39.4 40.4 40.6 40.6 40.8 41.0 40.8 40.7 40.2 39.9 35.3 35.8 36.8 37.6 37.7 37.8 38.4 38.2 38.4 38.0 37.6... -
Page 31: Indoor Airflow
Required Suction Tube Temperature SUCTION PRESSURE AT SERVICE PORT (Psig) SUPERHEAT TEMP (F) 61.5 64.2 67.1 79.2 82.4 85.7 NOTE: Measure suction tube temperature with accurate superheat ther- mometer or thermistor-type thermometer C95030 Fig. 30—Required Suction Tube Temperature (F) * METERING DEVICE —... - Page 32 OUTDOOR COIL INDOOR COIL Check Valves STRAINER Closed Open Closed Open LEGEND Loss of Charge Switch Acutrol Metering Device Check Valve (Arrow indicates direction of flow) COOLING CYCLE 1. Hot gas from compressor flows through the 4-way valve and is 3.
- Page 33 OUTDOOR COIL INDOOR COIL Check Valves STRAINER Open Closed Open Closed LEGEND Loss of Charge Switch Acutrol Metering Device Check Valve (Arrow indicates direction of flow) HEATING CYCLE 1. Hot gas from compressor flows through the 4-way valve and is 3.
- Page 34 Table 14—Troubleshooting Chart SYMPTOM CAUSE REMEDY Power Failure Call power company Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker Defective thermostat, contactor, transformer, control relay, defrost board, or high pressure or loss- Replace component Compressor and outdoor fan of-charge/low pressure switch will not start Insufficient line voltage...
- Page 35 Table 14—Troubleshooting Chart (Cont’d) SYMPTOM CAUSE REMEDY Low refrigerant charge Check for leaks, repair and recharge Head pressure too low Restriction in liquid tube Remove restriction Move timer on control board to 30 minutes (Heat) Outdoor coil frosted between defrost cycles (Cool) High Heat load Check for source and eliminate Excessive suction pressure...
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Page 36: Start-Up Checklist
† Measured at liquid line leaving outdoor coil Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 6 PC 101 Catalog No. 535–00101 Printed in U.S.A. Form 50HX-5SI Pg 3 6 7–03 Replaces: 50HX-4SI...