INTEGRATED CONTROL BOARD A3
11-Burner Control A3
WARNING
Electric shock hazard. Can cause injury
or death. Before attempting to perform
any service or maintenance, turn the
electrical power to unit OFF at disconnect
switch(es). Unit may have multiple power
supplies.
The burner control A3 is located in the gas heat section.
The ignition control provides four main functions: gas
The control has a green LED to show control status
and A3 allows three trials for ignition before locking out.
control automatically resets and provides three more
attempts at ignition. Manual reset after lockout requires
removing power from the control for more than 1 second
or removing the thermostat call for heat for more than 1
second but no more than 20 seconds. 24 volt thermostat
6 for thermostat terminations and TABLE 7 for heating
component terminations
TABLE 5
LED STATUS
Normal operation. No call for heat
Normal operation. Call for heat
Steady On
or closed
Primary High Limit switch open
On Board Microprocessors Disagree
TABLE 6
P2 TERMINAL DESIGNATIONS
PIN #
Function
1 R 24 Volts to thermostat
2 W1 Heat Demand
3 Y Cool Demand
4 C Common
G Indoor Blower
6 BL OUT
7 W2 Second Stage Heat
TABLE 7
PIN #
Function
1 Limit Switch Out
2
3 Gas Valve Common
4 Gas Valve Out
6 Limit Switch In
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