Carrier 30GT specifications +------+g+----+J, Operation and Adjustment

ALL FLOTRONIC UNITS - Units require control relays R) and Time Delay Module. They may be ob- tained ! rom your Carrier distributor under the following Carrier Part Numbers:

Rl and R2	115-v	HN61KK041	DPDT
	23Cbv	HN61KK913	DPDT
R3	24-v	H N 6 1 K K 0 4 0	DPDT
Time Delay Module		30HK501602

UNITS 30HK,HL015 THROUGH 060 (Except 020, 60 Hz, and 0 15, 50 Hz.)

IMPORTANT: On 30HK,HL 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 30GTO15 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.

-j+------+g+----+J-

T B 2HGSTB2

A . CONNECTIONS FOR SINGLE - COMPRESSOR UNITS (60~~: 015,025,030; 50~z: 0 2 0 , 0 2 5 )

-me--	- - - - - -
HGS	-El--
	TB2

,B. CONNECTIONS FOR TWO - COMPRESSOR UNITS ( 5 0 A N D 6 0 H Z : 040,050,060; 50HZ: 0301

See Combined Legend.

Fig. 7 - Hot Gas Bypass Field Wiring;

30HK,HL Units

OPERATION AND ADJUSTMENT

The bypass valve is factory set to begin opening when suction pressure drops to about 62 psig. This pressure corresponds to a chllled 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 y; setting for proper operation. Conversely, for chllled water set points above 44 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 vaIve set point until it opens at the desired conditions.

i,--------	--e---t-	LLSV
H G S		i

See Combined Legend.

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

Fig. 8 - Hot Gas Bypass Fierd Wiring; 30GT Units

COMBINED LEGEND (Fig. 3 - 8)

Compressor Contactor (%-in. Female Quick-Conn) FiGS 1 Hot Gas Bypass Solenoid (Splice Conn)

LLSV - Liquid Line Solenoid Valve

TB - Terminal Block (#6 Ring Conn)

T C 2 - Temperature Controller (X-in. Female Quick-Conn)

c l Terminal on TB

0 Terminal on Control Component

Factory Wiring

----Field Wiring

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book 2 PC171 Catalog No. 533-039 Printed in U.S.A. Form 30G,H-1 S1 PC4 4 2-89 Replaces: 30GB,WlSI

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