Carrier 50JZ-A - Manual

1
50JZ---A
Single Packaged Heat Pump System
with Puron (R---410A) Refrigerant
50 Hz, CE Nominal 7---14 kW (Sizes 24---48)
Installation Instructions
NOTE: Read the entire instruction manual before starting the
installation.
NOTE:
Installer: Make sure the Owner’s Manual and Service
Instructions are left with the unit after installation.
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS 1 . . . . . . . . . . . . . . . . . . . . . . . . .
INTRODUCTION 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RECEIVING AND INSTALLATION 2--9 . . . . . . . . . . . . . . . . . .
Check Equipment 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Identify Unit 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspect Shipment 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Provide Unit Support 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Roof Curb 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Slab Mount 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Provide Clearances 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rig and Place Unit 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rigging/Lifting of Unit 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Select and Install Ductwork 6 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Converting Horizontal Discharge Units to Downflow
(Vertical) Discharge Units 7 . . . . . . . . . . . . . . . . . . . . . . . . . .
Provide for Condensate Disposal 8 . . . . . . . . . . . . . . . . . . . . . .
Install Electrical Connections 10 . . . . . . . . . . . . . . . . . . . . . . . .
High--Voltage Connections 10 . . . . . . . . . . . . . . . . . . . . . . . .
Control Voltage Connections 10 . . . . . . . . . . . . . . . . . . . . . . .
Standard Connections 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transformer Protection 10 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessory Electric Heaters Installation 11 . . . . . . . . . . . . . . .
Sequence of Operation 11 . . . . . . . . . . . . . . . . . . . . . . . . . . .
PRE--START--UP 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
START--UP 13--16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking Cooling & Heating Control Operation 13 . . . . . . . .
Check for Refrigerant Leaks 13 . . . . . . . . . . . . . . . . . . . . . . . . .
Start--Up Adjustments 14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking & Adjusting Refrigerant Charge 14 . . . . . . . . . . . .
Indoor Airflow & Airflow Adjustments 15 . . . . . . . . . . . . . .
Defrost Control 17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Quiet Shift 17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Defrost 17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MAINTENANCE 17--20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Filter 18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Indoor Blower and Motor 18 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outdoor Coil, Indoor Coil, & Condensate Drain Pan 19 . . . . . .
Outdoor Fan 19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Controls and Wiring 19 . . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Circuit 19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Indoor Airflow 19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Metering Devices-- Piston 19 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure Switches 19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loss of Charge Switch 19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High Pressure Switch 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Copeland Scroll compressor (Puron Refrigerant) 20 . . . . . . . . .
A09042
Fig. 1 -- Unit 50JZ--A
Refrigerant System 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigerant 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compressor Oil 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Servicing Systems on Roofs with Synthetic Materials 20 . . . .
Liquid Line Filter Drier 20 . . . . . . . . . . . . . . . . . . . . . . . . . . .
PuronR (R--410A) Refrigerant Charging 20 . . . . . . . . . . . . .
System Information 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loss of Charge Switch 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Defrost Thermostat 20 . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING 21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
START--UP CHECKLIST 21 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SAFETY CONSIDERATIONS
Installation and servicing of this equipment can be hazardous due
to mechanical and electrical components. Only trained and
qualified personnel should install, repair, or service this equipment.
Untrained personnel can perform basic maintenance functions such
as cleaning and replacing air filters. All other operations must be
performed by trained service personnel. When working on this
equipment, observe precautions in the literature, on tags, and on
labels attached to or shipped with the unit and other safety
precautions that may apply.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Use quenching cloth for brazing operations.
Have a fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions included in
literature and attached to the unit. Consult local building codes, the
current editions of the National Electrical Code (NEC) NFPA 70.
In Canada refer to the current editions of the Canadian Electrical
Code CSA C22.1.
Recognize safety information. This is the safety--alert symbol .
When you see this symbol on the unit and in instructions or manu-
als, be alert to the potential for personal injury. Understand these