Carrier 30HK - Manual

Number One
Airconditioning
Maker
Carrier Parkwav • Syracuse NY 13221
Reciprocating Liquid Chillers (60 Hz)
All 208/230-volt units have extended-voltage
compressor motors.
All units have suction-cutoff unloading
system.
CONTENTS
Page
SAFETY CONSIDERATIONS............................................. I
INSTALLATION.................................................................. 1-6
Step 1 — Inspect Shipment.................................................... 1
Step 2 — Rig and Place Unit................................................. 1
• RIGGING
• PLACEMENT
Step 3 — Check Compressor Mounting
and Connections.................................................................. 3
• SERVICE ACCESS
Step 4 — Make Piping Connections ...................................... 3
• CONDENSER DESCRIPTION
• CONDENSER PIPING
• COOLER DESCRIPTION
• COOLER PIPING
Step 5 — Make Electrical Connections ..................................4
• ELECTRICAL BOX, CONTROL SECTION
• UNBALANCED 3-PHASE SUPPLY
VOLTAGE
• ELECTRICAL BOX, POWER SECTION
START-UP AND SERVICE.................................................. 6
Initial Check............................................................................ 6
Check Refrigerant Charge..................................................... 6
• LIQUID CHARGING METHOD
Check Oil Charge................................................................... 7
• TO ADD OIL
• TO REMOVE OIL
START-UP............................................................................ 7-10
Check Refrigerant Feed Components................................... 7
• THERMOSTATIC EXPANSION VALVE
• FILTER DRIER
• MOISTURE-LIQUID INDICATOR
• LIQUID-LINE SERVICE VALVE
• LIQUID-LINE SOLENOID VALVE
• PRESSURE RELIEF DEVICES
• CHECK VALVE
Check Compressor Protection Devices_
• CIRCUIT BREAKER
• MOTOR OVERTEMPERATURE
THERMOSTAT
• CRANKCASE HEATER
• TIME GUARD® CONTROL
• FOUR-FUNCTION TIMER
• OIL PRESSURE SAFETY
SWITCH (OPS)
Check Unit Safety Devices........................
• SAFETY THERMOSTAT
• HIGH-PRESSURE SWITCH
• LOW-PRESSURE SWITCH
Check Capacity Control System............... 10
DESCRIPTION
3-STEP TEMPERATURE
CONTROLLER
DESIGN SET POINT ADJUSTMENT
CYLINDER UNLOADING SYSTEM
Page
UNIT OPERATION...........................................................10-11
Control Power....................................................................... 10
Control Sequence.................................................................. 11
Unit Stoppage and Restart.................................................. 11
SERVICING COOLER..................................................... 11-13
Tube Plugging ....................................................................... 12
Retubing ................................................................................ 12
Tightening Cooler Head Bolts ............................................. 12
• GASKET PREPARATION
• BOLT TORQUES
• BOLT TIGHTENING SEQUENCE
TROUBLESHOOTING GUIDE....................................... 14,15
SAFETY CONSIDERATIONS
Installation, start-up and servicing of this
equipment can be hazardous due to system pres­
sures,
electrical components and equipment
location (roofs, elevated structures, etc.).
Only trained, qualified installers and service
mechanics should install, start-up and service
this equipment.
When working on the equipment, observe pre­
cautions in the literature, tags, stickers and labels
attached to the equipment and any other safety
precautions that apply.
• Follow all safety codes.
• Wear safety glasses and work gloves.
• Use care in handling, rigging and setting bulky
equipment.
INSTALLATION
Step 1 — Inspect Shipment
Inspect unit for damage or missing parts. If dam­
age is detected, or if shipment is incomplete, file a
claim immediately with the shipping company.
Step 2 — Rig and Place Unit
RIGGING
On each end of cooler, a steel loop is provided for
the preferred method of lifting unit. Use spreader
bars to keep cables away from compressor enclo*-
sure and control box. If unit is to be moved by fork
truck, use the following methods:
1. From front or rear, lift under the cooler rails.
Unit can be either on or off skid.
2. When moving from ends, leave unit on skid. Lift
from under skid.
© Carrier Corporation 1983 Form 30HK.HL-10SI