Carrier 50ZPA Installation Instructions

1
50ZPA
Single--Packaged Air Conditioner System
W it h R--22 Refrigerant
Single-- and Three--Phase Units (Sizes 024--060)
Installation Instructions
NOTE: Read the entire instruction manual before starting the
installation.
TABLE OF CONTENTS
Page
SAFETY CONSIDERATIONS 2........................
INTRODUCTION 2..................................
RECEIVING AND INST ALLATION 2--10................
Check Equipment 2.................................
Identify Unit 2...................................
Inspect Shipment 2................................
Provide Unit Support 2..............................
Slab Mount 2....................................
Ground Mount 2.................................
Provide Clearances 2................................
Place Unit 2.......................................
Select and Install Ductwork 2..........................
Configuring Units for Downflow (Vertical) Discharge 3...
Connect Condensate Drain 3..........................
Install Electrical Connections 5........................
High-- Voltage Connections 5........................
Routing Power Leads Into Unit 6.....................
Connecting Ground Lead to Unit Ground 6.............
Routing Control Power Wires 6.....................
Accessory Electric Heat Wiring 6.....................
PRE --START -- UP 7...................................
START--UP 7 --17.....................................
Check for Refrigerant Leaks 7.........................
Start--Up Cooling and Make Adjustments 7...............
Checking Cooling and Heating Control Operation 7......
Refrigerant Charge 8..............................
No Charg e 8.....................................
Low Charge Cooling 8.............................
Indoor Airflow and Airflow Adjustments 8.............
Unit Controls 9...................................
High-- Pressure Relief Valve 9........................
Low--Pressure Switch 9............................
Compressor Overload 9............................
Compressor Rotation 9.............................
Sequence of Operation 9...........................
Fan Operation 9..................................
A05194
Fig. 1 -- Unit 50ZPA
Cooling Operation 9, 17............................
Heating Operation 17..............................
Continuous Fan 17................................
Defrost 17......................................
Electric Resistance Heating 17.......................
MAINTENANCE 17 --20...............................
Air Filter 18.......................................
Unit Top Removal 18................................
Indoor Blower and Motor 18..........................
Outdoor Coil, Indoor Coil, and Condensate Drain Pan 19....
Outdoor Fan 19....................................
Electrical Controls and Wiring 19......................
Refrigerant Circuit 20................................
Indoor Airflow 20..................................
Metering Devices 20................................
Liquid Line Strainers 20..............................
High Flow Valves 20................................
TROUBLESHOOTING 20.............................
START--UP CHECKLIST 22...........................

Carrier 50ZPA Specifications

General

Brand	Carrier
Model	50ZPA
Category	Air Conditioner
Language	English