Carrier 30GT specifications Dehydrate and Recharge Circuit, Install Control Wiring

Step 3 - Dehydrate and Recharge Circuit -

W h e n piping has been completed, leak test the assembly and replace the filter drier, or core(s) for circuit no. 1. On single-compressor chillers (30HK,HLO 15,025 and 030 for 60 Hz, 020,025 for 50 Hz; 30GT) the filter drier itself must be replaced.

After core (or drier) replacement, evacuate, dehydrate and recharge the circuit. Procedures for evacuation, dehydration and charging are detailed in Carrier Stand- ard Service Techniques Manual, Chapter 1, Refrig- erants, Sections 6 and 7.

Step 4 - Install Control Wiring

I Be sure all power to the unit is off before proceeding1.

			T I M E	D E L A Y
			MODULE
	6 0			0 K		HGS
			RESISTOR
RI R2		4x”r,ct			-4-
			T I M E	D E L A Y
			MODULE

3OGB040-0703066075-200

A= T B 2 c4 l	AzTB3		c I	l
q	6: T B	2	c	l
B=TB2 IO

~

I

Wires between field-installed components and unit control box must be enclosed in conduit. Wire size is

no. 16 AWG minimum. Wire-end terminals required on field wires are indicated in the Combined Legend for Fig. 3 - 8.

UNITS 30GB040 THROUGH 070 FLOTRONIC (See Fig. 3.) - Control logic allows the hot gas bypass to be energized only on the first stage of capacity.

A unit with 2 unloaders has the automatic lead/lag feature which allows starting of either circuit, and thus must have 2 hot gas bypass packages, one per circuit (see Fig. 4).

On the 040-060 units, R3 should energize with com- pressor no. 2. On the 070 unit. R3 energizes with com- pressor no. 3. In both instances, it is the lead compressor on circuit no. 2 (see Fig. 5.)

The time delay module must be set for a one-minute delay by connecting a 600k-ohm resistor between the center terminals of the module (see Fig. 6). (One second of time delay results from each lOk-ohms of resistance.)

NOTES:

1.Relays R 1 and R2 apply to all units.

2.R3 applies only to units with a single unloader. Units with no unloaders or 2 unloaders do not require R3.

3.30GB 175 and 200 units do not use unloaders.

Fig. 4 - Hot Gas Solenoid Wiring, Units with

No Unloaders or Two Unloaders

Fig. 5 - RI and R2 Coil Wiring, All Units

Connect R2 in parallel with lead compressor in circuit 2:

30GB040-060 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Comp 2 30GB070-100 . . . . . . . . . . . . . . . . . , . . . . . . . . . . *. . . . . . . . . . Comp 3 30GBliO-150 . . . . . . . . . . . . . . . . . . . . . . . . . . . . I +. . . . . . . . . Comp 4

30GB175,200 . ., . . . . . . . , . ., . . . . . . . . . . . . . . . . . ,. *. . .,. Comp 5

(Refer to Fig. 2 for compressor locations.)

6 0 0 K

R E S I S T O RHGS

iwtell

RI R2 R3

Fig. 6 - Hot Gas Solenoid Wiring,

Single Unloader Units

30G6040-070

RELAY

BOARD

J 6		FIELD	SPLICE
	ORN ,	r4 I ,	PLI-‘(YR
e
P I N 44--		I	PL2-7(FOR CKT NO.21

T B 4	30GB075-150
	TE2

r--a--+J

N O T E : 3 0 6 3 1 7 5 , 2 0 0 - R 3 D O E S N O T A P P L Y .

FLOTRONIC’” UNITS, 30GB040 THROUGH 070 - Drill a hole to accommodate a standard conduit fitting in bottom of control box at fight end, adjacent to existing entrance hole for control wiring. Locate HGR (,Hot Gas Bypass Relay) in right side of control box adjacent to

CKTF”,;.existing‘)relays. Using the HGR base as a template, mark mountmg hole locations and drill appropriate hole. Run conduit from the bypass valve to the control box and wire relays into control circuit as shown in Fig. 4. Relays and Time DeIay Module should be installed in the upper left corner of the control box, above the transformer.

FLOTRONIC UNITS, 30GB075 THROUGH 200 - Driil 2 holes in the bottom right of the control box, next to the compressor conduit holes, to accommodate stand-

Fig. 3 - R3 Coil Wiring (R3 used only with	ard conduit fittings. Run conduit from the bypass valve
	to the control box and wire relays into control circuit
units having a single unloader)
	as shown in Fig. 4.