Carrier 48LC Series Service And Maintenance Instructions page 29

Red LED-Status
TERMINAL LABEL
INPUTS
RT, C
SS
FS, T1
W
RS
LS
CS
OUTPUTS
L1, CM Induced draft combustion motor
IFO
GV
Fig. 40 - - Integrated Gas Control (IGC) Board
Table 9 – IGC Connections
POINT DESCRIPTION
Input power from TRAN 1
Speed sensor
Flame sensor
Heat stage 1
Rollout switch
Limit switch
Centrifugal switch (not used)
Indoor fan
Gas valve (heat stage 1)
SENSOR LOCATION TYPE OF I/O
control box
gas section analog input
gas section switch input
CTB
gas section switch input
fan section switch input
— switch input
gas section
control box
gas section
29
C08452
CONNECTION
PIN NUMBER
24 VAC —
J1, 1-3
—
24 VAC J2, 2
J2, 5-6
J2, 7-8
J2, 9-10
line VAC
relay J2, 1
relay J2, 11-12