Carrier 30GA- Manuals

Page 2 - WARNING Be sure power to equipment; Lg

Table 1 — Weight Distribution "fàble*^2 — Physical Data U N I T 30GA 020 ” 025 030 APPROX location UNIT 30 G A 020 ’ OPER WT (lb) 1. 2 .3 J J. . Weight (lb) 5 6 APPROX NET WT (lb) REFRIG CHARGE, R-22 (lb) 2600 55 2695 756 190 905 372 2^'2 260 COMPR 06E* 2250 2875 790 200 960 415 235 275 No. Cyl....

Page 3 - IMPORTANT Operation on improper supply; ZiO

$»«je8ER Fl.AN«ED WASHER MEORRERE SNUB8ER . COMPRESSOR POOT (SOCATJON SPRiNC Fig. 2 — Compressor Mounting Chilled Water and Drain Piping — Facing the cooler side of the unit, the return water connection is on the left and the leaving water connection is on the riglrt (see Fig. 1). The connections ar...

Page 4 - EQUIP GND; Fig. 3 — Field Wiring Connections

IMPORTANT: Make provisi-on for the auxii- iaxy power to be always on (except for servic- mg or prolonged shutdown) to ensure power to the heaters. A toggle switch (marked SW) in the control box allows the control circuit to be manually discon nected when necessary. This switch does not affect the c...

Page 5 - Refrigerant Charge; CAUTION: Never charge liquid in to low-pressure; Auxiliary Power Circuit; The cooler heater is factory; Fig. 4 — Fan Adjustment; Do not remove supports until the struts are; Cooler Head Bolt Tightening

leaks. After leaks are repaired, the system must be dehydrated. For leak testing and dehydration procedures, refer to Carrier Standard Service Techniques Manual, Chapter 1, Refrigerants, Sections 6 and 7. Refrigerant Charge — When additional or complete field charging is required, refer to Table 1...

Page 6 - Fig. 5 — 30GA Unit with Access Panels Removed

COOLER SECTION END PANEL (EACH END) COOLER---------- SAFETY THERMOSTAT BULB THE FAN CYCLING TEMPERATURE SWITCH IS LOCATED IN THE LOWER RIGHT CORNER OF THE PANEL BELOW THE CONDENSER COIL UNIT CONTROL BOX FILTER DRIER LOW SIDE HIGH SIDE OIL PRESSURE CONNECTIONS OIL SIGHT GLASS Fig. 5 — 30GA Unit with ...

Page 7 - When addi

BOLT TIGHTENING SEQUENCE (See Fig. 6) Step 1 — Tighten moderately (without torquing) all the flange bolts in the sequence shown. Step 2 — Tighten moderately (without torquing) the hex nuts on the center studs (no specified sequence). Step 3 — Repeat Step 1, tightening the bolts to the specified torq...

Page 8 - Cooler Freeze-Up Protection; cat; Fig. 7 — Safety Thermostat; hold the; High-Pressure Switch

CRANKCASE HEATER prevents absorption of liquid refrigerant by oil in crankcase during brief or extended shutdown periods. Source of 115-volt power is the auxiliary control power, independent of the main unit power. This assures compressor protection even when main unit power disconnect switch is off...

Page 10 - OPERATION; Sequence of Control

tion and allow the unit to run thru a cycle. At the instant the last step of capacity unloads (switch no. 1 opens), read the temperature. If it is not the same as the dial reading, the variation can be com pensated by shifting the control point sliglrtly. C'AUTION: Do not force tlie dial pasit the ...

Page 11 - TROUBLESHOOTING

With no refrigerant returning to the compressor, low side pumpout takes place and the compressor shuts down on low-pressure control. The compres sor will not restart until the WTC again calls for cooling. HOT GAS BYPASS On the last step of capacity control (only WTC switch no. 1 made), the Hot Gas ...