Carrier 50JX- User Manual
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Table of Contents:
- Page 2 – REQUIRED CLEARANCE FOR OPERATION AND SERVICING
- Page 3 – Step 2—Provide Unit Support; The gasketing of the unit to the roof curb is critical
- Page 4 – Fig. 4—Roof Curb Dimensions
- Page 5 – Fig.5—Unit Leveling Tolerances; Fig. 6—Slab Mounting Detail
- Page 6 – Step 6—Provide for Condensate Disposal; Fig. 8—Suggested Rigging; Table 2—Minimum Airflow for Reliable Electric; Fig. 9—Typical Installation
- Page 7 – Step 7—Install Electrical Connections; Table 1—Physical Data—Unit 50JX; Fig. 10—50JX with Accessory Duct Covers On; Accessory Duct Covers; Fig. 11—Condensate Trap
- Page 9 – Fig. 12—Wiring Schematics
- Page 10 – Fig. 13—Wiring Schematics
- Page 11 – Fig. 14—Wiring Schematics
- Page 12 – Table 3—Electrical Data—50JX
- Page 13 – GROUND LUG; Fig. 18—Control Wiring Plate
- Page 14 – Fig. 20—Fan Blade Clearance
- Page 15 – Fig. 22—Typical Heat Pump Operation, Cooling Mode; LEGEND; LEGEND
- Page 17 – Table 4—Wet Coil Air Delivery
- Page 18 – MAINTENANCE
- Page 19 – SYSTEM INFORMATION; Because these switches are attached to refrigeration; Fig. 29—Refrigerant Circuit; FEEDER TUBE
- Page 20 – Table 5—Cooling and Heating Troubleshooting Chart
- Page 21 – Cooling and Heating Troubleshooting Chart (cont’d)
50JX024-060
Single-Package Heat Pump Units
Installation, Start-Up and Service Instructions
NOTE:
Read the entire instruction manual before starting the
installation.
SAFETY CONSIDERATIONS
Index
SAFETY CONSIDERATIONS ...............................................1-2
General
.................................................................................
2
RECEIVING AND INSTALLATION ..................................2-15
Check Equipment......................................................................2-3
Identify Unit ..............................................................................2
Inspect Shipment ...................................................................2-3
Provide Unit Support ................................................................. 3
Roof Curb ..............................................................................3-5
Slab Mount ................................................................................5
Ground Mount...........................................................................5
Provide Clearances.......................................................................5
Rig and Place Unit .......................................................................5
Select and Install Ductwork ....................................................5-6
Converting Horizontal Discharge Units to Downflow (Vertical)
Discharge ........................................................................................6
Provide for Condensate Disposal ............................................6-7
Install Electrical Connections ..................................................7-8
High-Voltage Connections........................................................8
Routing Power Leads Into Unit ...............................................8
Connecting Ground Lead to Ground Lug ................................8
Special Procedures for 208-V Operation .................................8
PRE-START-UP......................................................................8-13
START-UP .............................................................................14-17
Check for Refrigerant Leaks ..................................................14
Unit Start-Up Adjustment .................................................14-17
MAINTENANCE ..................................................................18-19
SYSTEM INFORMATION.......................................................19
Time Delay Relay ...................................................................19
Pressure Switches....................................................................19
Defrost Thermostat .................................................................19
TROUBLESHOOTING .......................................................20-21
START-UP CHECKLIST .........................................................22
NOTE TO INSTALLER — READ THESE INSTRUCTIONS
CAREFULLY AND COMPLETELY before installing this unit.
Also, make sure the Owner’s Manual and Service Instructions 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.
Improper installation, adjustment, alteration, service, mainte-
nance, or use can cause explosion, fire, electric shock, or
other occurrences, which could cause serious injury or death
or damage your property. Consult a qualified installer or
service agency for information or assistance. The qualified
installer or agency must use only factory-authorized kits or
accessories when modifying this product.
Recognize safety information. This is the safety-alert symbol
.
When you see this symbol on the product or in instructions or
manuals, be alert to the potential for personal injury.
Understand the signal words — DANGER, WARNING, CAU-
TION, and NOTE. Danger identifies the most serious hazards,
which will result in severe personal injury or death. Warning
indicates a condition that could cause serious personal injury or
death. Caution is used to identify unsafe practices, which would
result in minor personal injury or product and property damage.
NOTE is used to highlight suggestions which will result in
enhanced installation, reliability or operation.
1. The power supply (volts, phase, and hertz) must correspond to
that specified on unit rating plate.
2. The electrical supply provided by the utility must be sufficient
to handle load imposed by this unit.
3. This installation must conform with local building codes and
with NEC (National Electrical Code). Refer to provincial and
local plumbing or waste water codes and other applicable local
codes.
Fig. 1—50JX
C99001
Visit www.carrier.com
Manufacturer 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 101
Catalog No. 565-057
Printed in U.S.A.
Form 50JX-1SI
Pg 1
2-00
Replaces: New
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Summary
Before performing service or maintenance operations onsystem, turn off main power to unit. Turn off accessory heaterpower switch if applicable. Electrical shock could causesevere injury or death. Step 1—General The 50JX heat pump is fully self-contained and designed foroutdoor installation. See Fig....
Immediately notify the nearest Carrier Air Conditioning office ifany item is missing. To prevent loss or damage, leave all parts inoriginal packages until installation. Step 2—Provide Unit Support ROOF CURB — Install accessory roof curb in accordance withinstructions shipped with curb. See Fig. 4. I...
C99098 UNIT SIZE PART NUMBER A IN. [MM] B IN. [MM] C IN. [MM] D IN. [MM] 50JX Roof Curb 024-036 CPRFCURB007A00 14 [356] 11-27/32 [301] 30-5/8 [778] 28-3/4 [730] 042-060 CPRFCURB009A00 14 [356] 15-27/32 [402] 42-1/8 [1070] 40-1/4 [1022] Fig. 4—Roof Curb Dimensions NOTES:1. Roof curb must be set up fo...
