Bryant 607C-A installation instructions Defrost Control, Quiet Shift

607C-- -- A

HIGH

STD DEHUM

LOW

COM

QC5

QC4

QC3

KZ

KL

QCR

DCR

R13

C8

R11

Q1

C

CDM/C

07

09

0L0

08

ALO

D2

QC1

Q3

AL2

24VAC/R

C9

C4

G1

RL

01

G2

3AMP

QIL

Z2

06

04

A7

R9

AB

A15

C0

F1

U1

Z1

C3

R4

RL4

D5

D3

C7

JWZ

P3

R2

JW5

R3

R5

R6

P2

JW3

QCB

P4

SDL

Y

R

W2 Y

C

W3 W3 W2 W2 C

JW4

SSTZ-8

P1

Y2

Y1

W3 W2

G

C

R

DH

Y

A09059

Fig. 16 - Interface Fan Board (IFB)

ACCUMULATOR COMPRESSOR

OUTDOOR COIL INDOOR COIL

TXV in Bypass

Position

LCS

HP S

			Metering
	LEGEND		Position
	HPS – High Pressure Switch
	LCS – Loss of Charge Switch
		Accurater®Metering De vice
		Arrow indicates direction of flow					C03012
		Fig. 17 - Typical Heat Pump Operation, Heating Mode
Step 3 — Defrost Control			60 minutes). To initiate a forced defrost, two options are available
Quiet Shift			depending on the status of the defrost thermostat.
			If defrost thermostat is closed, speed-up pins (J1) must be shorted
Quiet Shift is a field-selectable defrost mode, which will eliminate
			by placing a	flat head	screw driver in	between for	5 sec and
occasional noise that could be heard at the start of defrost cycle and
			releasing, to	observe a	complete defrost	cycle. When	the Quiet
restarting of heating cycle. It is selected by placing DIP switch 3
			Shift switch is selected, compressor will be turned off for two 30
(on defrost board) in ON position.
			sec intervals during this complete defrost cycle, as explained
When Quiet Shift switch is placed in ON position, and a defrost is
			previously. When Quiet Shift switch is in factory default OFF
initiated, the following sequence of operation will occur. Reversing			position, a normal and complete defrost cycle will be observed.
valve will energize, outdoor fan will turn off, compressor will turn			If defrost thermostat is		in open position, and speedup pins are
off for 30 sec and then turn back on to complete defrost. At the
			shorted (with a flat head screw driver) for 5 sec and released, a
start of heating after conclusion of defrost reversing valve will
			short defrost cycle will be observed (actual length is dependent
de-energize, compressor will turn off for another 30 sec, and the
			upon the selected Quiet Shift position). When Quiet Shift switch is
outdoor fan will stay off for 40 sec, before starting in the Heating
			in ON position, the length of defrost			is 1 minute (30 sec
mode.
			compressor off period followed by 30 sec of defrost with
Defrost
			compressor operation). On return to heating operation, compressor
The defrost control is a time/temperature control which includes a			will again turn off for an additional 30 sec and the outdoor fan for
field-selectable time period (DIP switch 1 and 2 on the board)			40 sec. When the Quiet Shift is in OFF position, only a brief 30
between defrost cycles of 30, 60, 90, or 120 minutes (factory set at			sec. cycle will be observed.
			20