42
Servicing should only be performed by a Qualified Service Agent
CCb ConneCtion identifiCation
J1 Socket - Transformer
pin #
desCription
1
120 VAC hot to transformer
2
Not used
3
120 VAC neutral to transformer
4
24 VAC out from transformer
5
24 VAC out from transformer
J2 Socket - 120 VAC To Combustion Blower
pin #
desCription
1
120 VAC hot to Combustion Blower 3 pin socket, see figure 7 on page 11
2
120 VAC neutral to Combustion Blower 3 pin socket, see figure 7 on page 11
3
Not used
4
Not used
J3 Socket - 120 VAC Power Supply
pin #
desCription
1
120 VAC hot
2
Earth Ground
3
120 VAC neutral
J4 Male Spade Connector - Flame Sensor
J5 Socket - Igniter 120 VAC HSI (hot surface igniter)
pin #
desCription
1
120 VAC hot
2
120 VAC neutral
J6 Socket - 24 Volt Gas Valve, Pressure Switches, Enable/Disable Circuit
pin #
desCription
1
Not used
2
Gas valve - 24 VAC output (rectified to 24 VDC at the gas valve wiring harness plug end)
3
Not used
4
Blocked Intake Air switch
5
Blocked Exhaust switch
6
Blower Prover switch
7
Blower Prover switch
8
Enable/disable external control circuit - jumper installed from factory
9
Not used
10
Blocked Exhaust switch
11
Enable/disable external control circuit - jumper installed from factory
12
Not used
13
Not used
14
Blocked Intake Air switch
15
Gas valve - 24 VAC output (rectified to 24 VDC at the gas valve wiring harness plug end)
