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IMPORTANT — READ BEFORE INSTALLING
1. Read and become familiar with these installation in-
structions before installing this unit.
2. Be sure the installation conforms to all applicable local
and national codes.
3. These instructions contain important information for the
proper maintenance and repair of this equipment. Re-
tain these instructions for future use.
CONTENTS
Page
SAFETY CONSIDERATIONS .......................1
INSTALLATION .................................1-8
I. Complete Pre-Installation Checks ............1
II. Rig and Mount the Unit .....................3
III. Complete Refrigerant Piping Connections .....4
IV. Make Electrical Connections ................6
START-UP ....................................8-11
I. Preliminary Checks ........................8
II. Evacuate and Dehydrate ....................8
III. Refrigerant and Oil Charge ..................8
IV. Refrigerant Service Ports ...................9
V. Sequence of Operation .....................9
VI. Checking Cooling and Heating Control
Operation ...............................10
VII. Malfunction ..............................10
SERVICE ....................................11,12
I. Cleaning ................................11
II. Lubrication ..............................12
III. Outdoor Fan Adjustment ...................12
IV. Compressor Removal .....................12
TROUBLESHOOTING CHART ...................13,14
START-UP CHECKLIST .....................CL-1,CL-2
SAFETY CONSIDERATIONS
Installing and servicing air-conditioning equipment can be haz-
ardous due to system pressure and electrical components. Only
trained and qualified service personnel should install or serv-
ice air-conditioning equipment.
When working on air-conditioning equipment, observe pre-
cautions in literature and on tags and labels attached to unit.
Follow all safety codes. Wear safety glasses and work gloves.
Use quenching cloth for brazing operations. Have fire extin-
guisher available. Read these instructions thoroughly. Con-
sult local building codes and National Electrical Code (NEC)
for special installation requirements.
WARNING:
Before installing or servicing system, al-
ways turn off main power to system. There may be more
than one disconnect switch. Electrical shock can cause
personal injury.
INSTALLATION
The 575A090 unit uses a semi-hermetic compressor. See
Table 1 for physical data.
The 575A090 outdoor unit is approved for use only with the
524A-H090 indoor unit. Use only approved indoor unit.
The 575A090 unit is Underwriters’ Laboratories (UL) and UL
Canada approved for use with the 524A-H090 indoor unit only.
I. COMPLETE PREINSTALLATION CHECKS
A. Uncrate Unit (See Fig. 1)
Remove unit packaging except for the top skid assembly and
wood bumpers, which should be left in place until after unit
is rigged into place.
B. Inspect Shipment
File claim with shipping company if shipment is damaged or
incomplete.
C. Consider System Requirements
• Consult local building codes and NEC for special installa-
tion requirements.
• Allow sufficient space for airflow clearance, wiring, refrig-
erant piping, and servicing unit. See Fig. 2.
• Locate unit so that outdoor unit airflow is unrestricted on
all sides and above. Refer to Fig. 2.
• Unit may be mounted on a level pad directly on base rails
or mounted on raised pads at support points. See Fig. 2 for
weight distribution based on recommended support points.
• Provide for condensate drainage and defrost water dis-
posal beneath unit.
• Areas with high snowfall may need elevated mounting for
adequate airflow.
NOTE: If vibration isolators are required for a particular in-
stallation, use corner weight information in Fig. 2 to make
proper selection.
Fig. 1 — 575A090 Unit
installation, start-up
and service instructions
COMMERCIAL AIR-COOLED
SPLIT SYSTEM HEAT PUMP
575A
Size 090
7
1
⁄
2
Tons
Cancels: II 575A-90-1 II 575A-90-2
12/1/95