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Subject to change without notice
Manufacturing point: Jeddah, Saudi Arabia
Nearest port of embarkation: Jeddah Islamic port
Product classification: Commercial
The 50ZPM units are single side discharge rooftop cooling unit utilizing electric heat as an option. Units are pre-
wired, pre-charged with R-410A refrigerant, and tested at the factory. These units can be placed on the side of a
building or can be placed on a roof without roof curbs. Each unit is designed to occupy a minimal space. Piping and
drain connections are readily accessible.
The 50ZPM unit is a packaged air conditioner manufactured for housing, residential, and light commercial
applications. The 50ZPM unit design is the result of our firm commitment to the development of the finest air
conditioners that modern technology can offer.
Contact your local Carrier representative for additional reference materials and information.
Quality Assurance
Certificate Reg. No:
04 100 950420
50ZPM – 50Hz
Nominal Cooling Capacity 3.0 – 5.0 Tons
HFC R - 410A Refrigerant
Package Rooftop Units – 50Hz
Installation, Operation and Maintenance
Page 1
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Table of Contents
Related Manuals for Carrier 50ZPM
Summary of Contents for Carrier 50ZPM
- Page 1 HFC R - 410A Refrigerant The 50ZPM units are single side discharge rooftop cooling unit utilizing electric heat as an option. Units are pre- wired, pre-charged with R-410A refrigerant, and tested at the factory. These units can be placed on the side of a building or can be placed on a roof without roof curbs.
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Page 2: Table Of Contents
MAINTENANCE ................................. 15 ELECTRICAL DATA ..............................21 TYPICAL WIRING SCHEMATIC ..........................22 SUPERHEAT CHARGING TABLE – 50ZPM – SIZE 36;48 ..................23 SUBCOOLING CHART – 50ZPM – SIZE 60 ......................24 R-410A Refrigerant Quick Reference Guide ......................25 Troubleshooting................................ 26 Start–Up Check List .............................. -
Page 3: Safety Considerations
Warranty is based on the general terms and conditions of the manufacturer. Any modifications to the design and/or installation made without discussion with Carrier and without advance written agreement will result in the loss of the right to any warranty claims and any claim for injury to personnel as a result of these modifications. - Page 4 WARNING ELECTRICALSHOCK HAZARD Failure to follow this warning could cause personal injury, death and/or equipment damage. Before performing service or maintenance operations on unit, always turn off main power switch to unit and install lockout tag. Unit may have more than one power switch. WARNING UNIT OPERATION AND SAFETY HAZARD Failure to follow this warning could cause personal injury, death...
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Page 5: Physical Data
PHYSICAL DATA - ENGLISH Unit 50ZPM Unit Size (Nominal Ton) Unit Dimensions - in 50.98 x 31.99 x 34.61 50.98 x 31.99 x 38.62 50.98 x 31.99 x 46.62 Unit Operation Weight - LBS Refrigeration System Compressor No.# / Type... -
Page 6: Base Unit Dimensions
BASE UNIT DIMENSIONS – 50ZPM Series Center of Gravity Unit Weight Unit Height Duct Opening Unit (mm) 50ZPM LBS. 30.12 [765] 14.0 [357.7] 13.7 [348] 14 [356] 19 [483] 14.0 [356] 34.13 [867] 19.9 [506.14] 13.9 [354] 14 [356] 19 [483] 16.0 [406]... -
Page 7: Typical Installation
INTRODUCTION The 50ZPM packaged air conditioner is fully self—contained and designed for outdoor installation. Standard units are shipped in a horizontal--discharge configuration for installation on a ground--level slab or directly on the ground, if local codes permit. Standard units can be converted to downflow (vertical) discharge configurations for rooftop applications with a field supplied plenum. -
Page 8: Step 3 - Provide Clearance
SLAB MOUNT - Place the unit on a solid, level concrete pad that is a minimum of 4 in. (101.6 mm) thick with 2 in. (50.8 mm) above grade. The slab should extend approximately 2 in. (50.8 mm) beyond the casing on all 4 sides of the unit. -
Page 9: Step 5 - Connect Condensate Drain
Return air duct: Two "L" brackets 14-in. x 20-in. Fig. 2 - Factory Installed Duct Flanges Table 1 – Minimum Airflow for Safe Electric Heater Operation Unit Minimum Airflow (CFM) 50ZPM 4.6 kW 6.9 kW 9.2 kW 13.8 kW 18.4 kW... -
Page 10: Step 6 - Install Electrical Connections
Condensate water can be drained directly onto the roof in rooftop installations (where permitted) or onto a gravel apron in ground level installations. Install a field--supplied condensate trap at end of condensate connection to ensure proper drainage. Make sure that the outlet of the trap is at least 1 in. (25.4 mm) lower than the drain pan condensate connection to prevent the pan from overflowing (See Fig. - Page 11 ROUTING POWER LEADS INTO UNIT - Use only copper wire between disconnect and unit. The high-voltage leads should be in a conduit until they enter the unit; conduit termination at the unit must be watertight. Run the high-voltage leads through the hole on the control box side of the unit (See Fig. 5). When the leads are inside the unit, run leads to the control box (See Fig.
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Page 12: Pre-Start-Up
PRE-START-UP Caution FIRE, EXPLOSION, ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death and/or property damage. 1. Follow recognized safety practices and wear protective goggles when checking or servicing refrigerant system. 2. Relieve and recover all refrigerant from system before touching or disturbing compressor plug if refrigerant leak is suspected around compressor terminals. -
Page 13: Start-Up
NO CHARGE - Use standard evacuating techniques. After evacuating system, weigh in the specified amount of refrigerant (refer to Table 1). Low Charge Cooling 50ZPM Unit 36-48, Fixed Metering Device: 1. Operate unit a minimum of 10 minutes before checking charge. -
Page 14: Step 4 - Indoor Airflow And Airflow Adjustments
10. If outdoor air temperature or pressure at suction port changes, charge to new suction line temperature indicated on chart. Low Charge Cooling 50ZPM Unit 60, TXV Metering Device: 1. Measure discharge line pressure by attaching a gauge to the service port. -
Page 15: Maintenance
If the heaters are staged, W2 is energized when the second stage of heating is required. When the need for heating is satisfied, the heater and IFM are de-energized. Table 2 – Wet Coil Air Delivery* 50ZPM Speed External Static Pressure (in. wg.) - Page 16 WARNING ELECTRIC SHOCK HAZARD Failure to follow this warning could result in personal injury or death. 1. Turn off electrical power to the unit and install lockout tag before performing any maintenance or service on this unit. 2. Use extreme caution when removing panels and parts. 3. Never place anything combustible either on or in contact with the unit.
- Page 17 WARNING ELECTRIC SHOCK HAZARD Failure to follow this warning could result in personal injury or death. Disconnect electrical power, and install lockout tag to the unit before cleaning and lubricating the blower motor and wheel. To clean the blower wheel: 1.
- Page 18 3. Inspect the fan blades for cracks or bends. 4. If fan needs to be removed, loosen the setscrew and slide the fan off the motor shaft. 5. When replacing fan blade, position blade as shown in Fig. 9. Tighten setscrews. 50ZPM “A” Model 25mm (0.98”)
- Page 19 Wear safety glasses and gloves when handling refrigerants. Keep torches and other ignition sources away from refrigerants and oils. Compressors vary in type by unit size. See Table 5 below for compressor type by size. Unit 50ZPM Compressor Type Manufacturer Suggested Oil Type...
- Page 20 All compressors in these units have internal overload protection. This protection will interrupt motor current under fault conditions such as running current overload. The Scroll compressors also have internal pressure relief that will relieve from the high side to the low side if the differential is excessive. Refrigerant - This system uses Puron (R-410A) refrigerant which has higher operating pressures than R-22 and other refrigerants.
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Page 21: Electrical Data
ELECTRICAL DATA 50ZPM - Application Compressor Electric Heater MOCP Power Supply Min - Max Unit Size HP FLA HP FLA Appl. KW V / Ph / Hz Voltage 11.1 4.59 19.9 25.0 35.0 6.88 29.9 35.0 9.18 39.9 45.0 13.80 60.0... -
Page 22: Typical Wiring Schematic
TYPICAL WIRING SCHEMATIC – 50ZPM – 400V-50Hz Page 22... -
Page 23: Superheat Charging Table - 50Zpm - Size 36;48
SUPERHEAT CHARGING TABLE - 50ZPM - SIZE 36; 48 (SUPERHEAT °F (°C) AT COMPRESSOR SUCTION SERVICE PORT) EVAPORATOR ENTERING AIR °F(°C) WB OUTDOOR TEMP °F (°C) 50 (10) 52 (11) 54 (12) 56 (13) 58 (14) 60 (16) 62 (17) 55 (12.7) -
Page 24: Subcooling Chart - 50Zpm - Size 60
SUBCOOLING CHART - 50ZPM - SIZE 60 Required Subcooling °F(°C) Outdoor Ambient Temperature °F(°C) 50ZPM Size 75(24) 85(29) 95(35) 105(41) 115(46) 15(8.3) 15(8.3) 15(8.3) 14(7.8) 14(7.8) Required Liquid Line Temperature for a Specific Required Liquid Line Temperature for a Specific... -
Page 25: R-410A Refrigerant Quick Reference Guide
ATTENTION INSTALLERS AND SERVICE TECHNICIANS! R-410A Refrigerant Quick Reference Guide • R-410A refrigerant operates at 50-70 percent higher pressures than R-22. Be sure that servicing equipment and replacement components are designed to operate with R-410A refrigerant. • R-410A refrigerant cylinders are rose colored. •... -
Page 26: Troubleshooting
Troubleshooting Guide Cooling Service Analysis PROBLEM CAUSE REMEDY Compressor and condenser fan will not Power failure. Call power company. start. Fuse blown or circuit breaker tripped. Replace fuse or reset circuit breaker. Defective thermostat, contactor, transformer, or Replace component. control relay. Insufficient line voltage. -
Page 27: Start-Up Checklist
START-UP CHECKLIST (Remove and Store in Job Files) I. PRELIMINARY INFORMATION MODEL NO.: ______________________________________ SERIAL NO.: ______________________________________ DATE: ___________________________________________ TECHNICIAN: _____________________________________ II. PRESTART-UP (Insert check mark in box as each item is completed) ( ) Verify that all packing materials have been removed from unit ( ) Remove all shipping hold down bolts and brackets per installation instructions ( ) Check all electrical connections and terminals for tightness ( ) Check that indoor (evaporator) air filter is clean and in place... - Page 28 Manufacturer reserves the rights to discontinue or change at any time, specifications or designs without notice and without incurring any obligations. Supersedes Version: 50ZPM-IOM-50HZ-01 Catalog Number: 50ZPM-IOM-50HZ-02 Page 28 Effective Date: 03-04-2019 Phase: 50Hz...
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