82 Product Manual WHR-2
2.04 CHILLER COMPONENTS
A. Compressor: The compressor shall be of the accessible hermetic reciprocating
type with suction and discharge service valves, crankcase oil heater and suction
strainer. Compressor shall have a forced feed lubrication system with a reversible
oil pump, oil sight glass, and oil charge. The compressor motor shall be
refrigerant gas cooled, high torque, hermetic induction type, four-pole, with
inherent thermal protection on all three phases and shall be mounted on rubber
vibration isolators.
B. Evaporator: The evaporator shall be direct expansion type with steel shell,
internal water baffles, and internally finned copper tubes roller expanded into
carbon steel tube sheets. Refrigerant heads shall be removable. The cooler shall
be insulated with a heavy layer of closed cell foamed insulation. It shall be
designed, tested and stamped in accordance with ASME Code requirements.
C. Refrigerant Circuit: The refrigerant circuit shall include a liquid line shutoff valve,
replaceable core filter-drier, sight glass with moisture indicator, liquid line
solenoid valve (no exceptions), thermal expansion valve, discharge gas muffler,
insulated suction line and a 450 psig (3104 kPa) relief valve.
D. Control System: A centrally located control panel shall contain the field power
connection points, control interlock terminals, and control system. Power and
starting components shall include automatic circuit breakers, fused control circuit
with control transformer, a motor contactor, solid-state start timer, solid-state
compressor three-phase motor overload protection, and unit power terminal
blocks for connection to remote disconnect switch. Hinged access doors shall be
lockable. Deadfront panels are required to protect against accidental contact with
line voltage when accessing the control system.
Safety and operating control shall include unit control stop switch, recycling
pumpdown control, oil safety switch, high and low pressure safety switch, water
temperature controller, freeze protection pressurestat. Unit shall provide limited
recycling pumpdown protection at all times.
E. The following options are to be included:
• Three phase power loss with under and over voltage protection.
• Refrigerant and oil pressure gauges.
• High return water thermostat to keep compressor unloaded with high
startup water temperatures. Contractor to field mount sensor and field
wire to control panel.
• Hot gas bypass.
• Chilled water flow switch to be field mounted by the contractor in the
chilled water line and field wired to terminals in the control panel.
• R-I-S or spring vibration isolators for field installation.
• Acoustic compressor enclosure when available from manufacturer.
PART 3 - EXECUTION
3.01 INSTALLATION
A. Install in strict accordance with manufacturer’s requirements, shop drawings, and
Contract Documents. Field installed refrigerant piping design to be approved by
the chiller manufacturer.
B. Adjust and level chiller in alignment on supports.
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