Integrated Gas Control (Igc) Board - Carrier 48/50PD05 User Manual

Integrated Gas Control (IGC) Board

The IGC is provided on gas heat units. (See Fig. 21 and Table 24.)
The IGC controls the direct spark ignition system and monitors the
rollout switch, limit switch, and induced-draft motor Hall Effect
switch.
TERMINAL
POINT DESCRIPTION
LABEL
RT, C Input power from TRAN 1
SS Speed sensor
FS, T1 Flame sensor
W Heat stage 1
RS Rollout switch
LS Limit switch
CS Centrifugal switch (not used)
L1, CM Induced draft combustion motor
IFO Indoor fan request
GV (W1) Gas valve (heat stage 1)
GV (W2) Gas Valve (heat stage 2, from MBB)
The IGC is equipped with an LED (light-emitting diode) for
diagnostics. See the Troubleshooting section for more information.
RED LED-STATUS
Fig. 21 - - Integrated Gas Control (IGC) Board
Table 24 — IGC Connections
SENSOR LOCATION
INPUTS
OUTPUTS
54
TYPE OF I/O
control box 24 VAC
gas section analog input
gas section switch input
MBB 24 VAC
gas section switch input
gas section switch input
switch input
gas section line VAC
control box relay
gas section relay
gas section
C07028
CONNECTION
PIN NUMBER
J1, 1--- 3
J2, 2
J2, 5--- 6
J2, 7--- 8
J2, 9--- 10
J2, 1
J2, 12
Not on IGC