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Cancels: II 575B-72-3 II 575B-72-4
9/15/04
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-14
I. Complete Pre-Installation Checks . . . . . . . . . . . . . . 1
II. Rig and Mount Unit . . . . . . . . . . . . . . . . . . . . . . . . . . 1
III. Complete Refrigerant Piping
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
IV. Complete Electrical Connections. . . . . . . . . . . . . . . 9
PRE-START-UP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15,16
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16-18
SEQUENCE OF OPERATION. . . . . . . . . . . . . . . . . . . . . .18-20
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20-24
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . .25,26
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . CL-1, CL-2
SAFETY CONSIDERATIONS
Installing, starting up, and servicing air-conditioning equip-
ment can be hazardous due to system pressures, electrical
components, and equipment location (roofs, elevated struc-
tures, etc.).
Only trained, qualified installers and service mechanics
should install, start-up, and service this equipment.
Untrained personnel can perform basic maintenance func-
tions such as cleaning coils. All other operations should be
performed by trained service personnel.
When working on the equipment, observe precautions in
the literature and on tags, stickers, and labels attached to
the equipment.
Follow all safety codes. Wear safety glasses and work gloves.
Keep quenching cloth and fire extinguisher nearby when
brazing. Use care in handling, rigging, and setting bulky
equipment.
GENERAL
The split system heat pump units described in this book are
designed for use with the 524A-H indoor packaged air
handler sections only.
INSTALLATION
I. COMPLETE PRE-INSTALLATION CHECKS
A. Uncrate Unit
Remove unit packaging except for the top skid assembly,
which should be left in place until after the unit is rigged
into its final location.
B. Inspect Shipment
File claim with shipping company if shipment is damaged or
incomplete.
C. Consider System Requirements
• Consult local building codes and National Electrical Code
(NEC) for special installation requirements.
• Allow sufficient space for airflow clearance, wiring, refrig-
erant piping, and servicing unit. See Fig. 1-3 for unit
dimensions. Figure 4 shows typical component locations
for 541A180 units.
• Locate unit so that outdoor coil airflow is unrestricted on
all sides and above.
• Unit may be mounted on a level pad directly on the base
channels or mounted on raised pads at support points.
See Table 1 for unit operating weights.
II. RIG AND MOUNT UNIT
A. Rigging
These units are designed for overhead rigging. Refer to rig-
ging label for preferred rigging method. Spreader bars are
not required if top crating is left on unit. All panels must be
in place when rigging. As further protection for coil faces,
plywood sheets may be placed against sides of unit, behind
cables. Run cables to a central suspension point so that angle
from the horizontal is not less than 45 degrees. Raise and set
unit down carefully.
If it is necessary to roll the unit into position, mount the unit
on field-supplied rails placed lengthwise under the unit,
using a minimum of 3 rollers. Apply force to the rails, not the
unit. If the unit is to be skidded into position, place it on a
large pad and drag it by the pad. Do not apply any force to
the unit.
Raise from above to lift unit from the rails or pad when unit
is in final position.
After unit in position, remove all shipping materials and top
crating.
WARNING: Before installing or servicing system,
always turn off main power to system and install lock-
out tag on disconnect. There may be more than one dis-
connect switch. Electrical shock can cause personal
injury.
CAUTION: Be sure unit panels are securely in
place prior to rigging. Be careful rigging, handling, and
installing unit. Improper unit location can cause sys-
tem malfunction and material damage. Inspect base
rails for any shipping damage and make sure they are
fastened securely to unit before rigging.
installation, start-up and
service instructions
AIR-COOLED SPLIT SYSTEM
HEAT PUMP
575B/575C/541A
Sizes 072-180
6 to 15 Tons