Download Code Alarm SRT 1600 Unit installation

Integrated Gas Control (IGC) Board
The IGC is provided on gas heat units. (See Fig. 18 and Table 18.)
The IGC controls the direct spark ignition system and monitors the
rollout switch, limit switch, and induced-draft motor Hall Effect
switch.
48/50LC
RED LED-STATUS
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Fig. 18 -- Integrated Gas Control (IGC) Board
Table 18 – Integrated Gas Control (IGC) Board Connections
TERMINAL
LABEL
POINT DESCRIPTION
TYPE OF I/O
CONNECTION
PIN NUMBER
control box
24 VAC
Spade
gas section
analog input
J1, 1--- 3
SENSOR LOCATION
INPUTS
RT, C
Power for IDR on 575v units
C
Input power common
SS
Speed sensor
FS, T1
Flame sensor
W
Heat stage 1 Call
G
Spade
gas section
switch input
Spade
MBB to CTB to IGC
24 VAC
J2, 2
Indoor Fan Call
CTB to IGC
24 VAC
J2, 3
R
Input power from TRAN 1
CTB to IGC
24 VAC
J2, 4
RS
Rollout switch
gas section
switch input
J2, 5--- 6
LS
Limit switch
gas section
switch input
J2, 7--- 8
CS
Centrifugal switch (not used)
switch input
J2, 9--- 10
OUTPUTS
L1, CM
Induced draft combustion motor or relay
gas section
line VAC
IFO
Indoor fan request
control box
relay
J2, 1
GV (W1)
Gas valve (heat stage 1)
gas section
relay
J2, 12
GV (W2)
Gas Valve (heat stage 2, from CTB)
gas section
Not on IGC
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