Carrier 30GT 用户手册

ALL FLOTRONIC UNITS 

 Units require control

relays

tained

R) and Time Delay Module. They may be ob-

rom your Carrier distributor under the following

Carrier Part Numbers:

115-v

DPDT
DPDT

H N 6 1   K K 0 4 0

DPDT

UNITS

 THROUGH 060 (Except 020,

60 Hz, and 0 15, 50 Hz.)

IMPORTANT: On 

 2-compressor units,

the SEQUENCE switch on the control panel must

be in the l-2 position to obtain hot gas bypass

operation.

Run the conduit from the bypass valve to one of the

knockouts provided on the right side of the unit control
box. Connect the control wires as shown in Fig. 7.
UNITS 

 THROUGH 035 (except 020, 60 Hz,

and 015, 50 Hz)   Connect control wires as shown in

Fig. 8. At LLSV, connect to existing splice containing
white wire.

T B 2

HGS

-

-

-

-

-

-

HGS

See Combined Legend.

The bypass valve is factory set to begin opening when

suction pressure drops to about 62 psig. This pressure
corresponds to a 

 water controller set point of

approximately 44 F. If the chilled water set point is lower
than 44 F, it will be necessary to decrease the bypass valve

setting for proper operation. Conversely, for 

 water

set points above 

 F, the bypass valve setting must be

increased. A change in condensing temperature will also

require a change in bypass valve set point. As condensing
temperature decreases, decrease the bypass 

 set

point until it opens at the desired conditions.

H G S

See Combined Legend.

Refer to unit wiring label inside front access door for complete
wiring schematic.

 

0

Compressor Contactor 

 Female Quick-Conn)

Hot Gas Bypass Solenoid (Splice Conn)
Liquid Line Solenoid Valve

Terminal Block 

 Ring Conn)

Temperature Controller 

 Female Quick-Conn)

Terminal on TB

Terminal on Control Component

Factory Wiring

Field Wiring

Book 2

Catalog No. 533-039

Printed in U.S.A.

Replaces: 

T a b