Sterlco 30RA Outdoor Air Cooled Central Chillers 10-60 Tons - Manual

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 903 Catalog No. 533-00045 Printed in U.S.A. Form 30RA-12SI Pg 1 7-02 Replaces: 30RA-1SI Book 2
Tab 5c
Installation Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
Step 1 — Rig and Place the Unit. . . . . . . . . . . . . . . . . . 1
• RIGGING
• PLACING UNIT
• MOUNTING UNIT
Step 2 — Check Compressor Mounting . . . . . . . . . . 3
Step 3 — Cooler Fluid and Drain Piping
Connections (Units Without
Hydronic Packages). . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
• PREPARATION FOR YEAR-ROUND
OPERATION
• PREPARATION FOR WINTER SHUTDOWN
Step 4 — Cooler Fluid and Drain Piping
Connections (Units With Factory-Installed
Hydronic Packages). . . . . . . . . . . . . . . . . . . . . . . . . . . 12
• WATER SYSTEM OVERVIEW
• AIR SEPARATION
• WATER CONNECTIONS
• WATER SYSTEM CLEANING
• SYSTEM PRESSURIZATION
• FILLING THE SYSTEM
Step 5 — Make Electrical Connections . . . . . . . . . . 18
• POWER SUPPLY
• POWER WIRING
• FIELD CONNECTIONS
Step 6 — Install Accessories . . . . . . . . . . . . . . . . . . . . 18
• ELECTRICAL
Step 7 — Refrigerant Circuit. . . . . . . . . . . . . . . . . . . . . 24
• LEAK TESTING
• DEHYDRATION
• REFRIGERANT CHARGE
APPENDIX A (Pressure Drop Curves,
30RA010-055) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25-27
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 (Fig. 1).
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. See Tables 1A-1D for Physical Data. Refer
to Fig. 2 for unit weights.
INSTALLATION
Step 1 — Rig and Place the Unit
RIGGING — Preferred method is with spreader bars from
above the unit. Use hooks in lifting holes. Rig at a single point
with 4 cables or use spreader bars. All panels must be in place
when rigging. See rigging label on unit for details concerning
shipping weights, distance between lifting holes, center of
gravity, and lifting ring dimensions. See Fig. 3.
If overhead rigging is not possible, place chiller on skid or
pad for rolling or dragging. When rolling, use a minimum of
3 rollers. When dragging, pull the pad. Do not apply force to
the unit. When in final position, raise from above to lift unit
off pad.
PLACING UNIT — There must be at least 3 ft (.9 m) for ser-
vice and for unrestricted airflow on all non-coil sides of unit,
and a minimum of 3.5 ft (1.1 m) clear air space on coil sides.
For multiple units, allow 8 ft (2.48 m) separation between units
for airflow and service.
MOUNTING UNIT — When unit is in proper location, use
of mounting holes in base rails is recommended for securing
unit to supporting structure, or for mounting unit on vibration
isolators if required. See Fig. 3. Fasteners for mounting unit are
field supplied. Be sure unit is level to within
1 /
8
in. per foot for
proper oil return to compressor.
ELECTRIC SHOCK HAZARD
Open all remote disconnects before servicing
this equipment.
All panels must be in place when rigging.
30RAN010-055
AquaSnap TM Liquid Chillers
With ComfortLink TM Controls
50/60 Hz
Fig. 1 — Typical 30RA Unit (010-018 Shown)