1
50EZ---A
Comfort
t
13 SEER Single---Packaged Heat Pump
System with Puron
(R---410A) Refrigerant
Three Phase
2 1/2---5 Nominal Tons (Sizes 30---60)
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--33
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Puron
R
(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-
Summary of Contents for COMFORT 50EZ-A30
Page 4: ...4 A150587 Fig 2 50EZ A30 36 Unit Dimensions 50EZ A...
Page 5: ...5 A150588 Fig 3 50EZ A42 60 Unit Dimensions 50EZ A...
Page 12: ...12 A11006 Fig 11 Connection Wiring Schematics 208 230 3 60 50EZ A...
Page 13: ...13 A11005 Fig 11 Cont Ladder Wiring Schematics 208 230 3 60 50EZ A...
Page 14: ...14 A10195 Fig 12 Connection Wiring Diagram 460 3 60 50EZ A...
Page 15: ...15 A10195 Fig 12 Cont Ladder Wiring Diagram 460 3 60 50EZ A...
Page 28: ...28 B A150586 Fig 16 Cooling Charging Table Subcooling 50EZ A...