1
50EZ ---A
Comfortt 13 SEER Single ---P ackaged Heat Pump
System with Puron (R---410A) Refrigerant
Three Phase
2 1 / 2 --- 5 N o m i n a l To n s ( S i z e s 3 0 --- 6 0 )
Installation Instructions
IMPORTANT: Effective January 1, 2015, all split system and
packaged air conditioners must be installed pursuant to applicable
regional efficiency standards issued by the Department of Energy.
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 --2.......................
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 3.................................
Inspection 3......................................
Rigging/Lifting of Unit 7............................
Select and Install Ductwork 7...........................
Converting Horizontal Discharge Units to Downflow
(Vertical) Discharge Units 8..........................
Provide for Condensate Disposal 9......................
Install Electrical Connections 9.........................
High--Voltage Connections 9.........................
Special Procedures for 208--V Operation 10..............
Control Voltage Connections 10.......................
Standard Connections 10............................
Transformer Protection 10...........................
Accessory Electric heaters Installation 10................
PRE--START --UP 18...................................
START--UP 18--24.....................................
Checking Cooling & Heating Control Operation 18........
Check for Refrigerant Leaks 18.........................
Start-- Up Adjustments 18.............................
50EZ--A Sequence of Operation 19....................
Checking & Adjusting Refrigerant Charge 19............
Indoor Airflow & Airflow Adjustments 19..............
Continuous Fan Operation 20........................
Defrost Control 28...................................
Quiet Shift 28.....................................
Defrost 28.......................................
MAINTENANCE 28--3 3................................
Air Filter 28........................................
Indoor Blower and Motor 28...........................
Outdoor Coil, Indoor Coil, & Condensate Drain Pan 29......
Outdoor Fan 29.....................................
Electrical Controls and Wiring 31.......................
Refrigerant Circuit 31.................................
Indoor Airflow 32...................................
A09034
Fig. 1 -- Unit 50EZ-- A
Metering Devices-- TXV & Piston 32....................
Pressure Switches 32.................................
Loss of Charge Switch 32.............................
High Pressure Switch 32..............................
Copeland Scroll compressor (Puron Refrigerant) 32.........
Refrigerant System 32................................
Refrigerant 32....................................
Compressor Oil 32.................................
Servicing Systems on Roofs with Synthetic Materials 32....
Liquid Line Filter Drier 33...........................
PuronR (R--410A) Refrigerant Charging 33.............
System Information 33................................
Loss of Charge Switch 33............................
Check Defrost Thermostat 33.........................
TROUBLESHOOTING 33..............................
START--UP CHECKLIST 33............................
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-
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