Technical Support US: 888-443-2751 Technical Support INTL: 316-943-2751
14
OVEN THEORY OF OPERATION
IC - The Ignition Control is powered by 24 VDC. The IC has two +24 VDC inputs; 1) from the
OMC via the TS2, and 2) a call for heat from the OMC via S2 which is mounted in M1. This will
turn a green LED on indicating IC has power and a call for heat. When the IC receives a call for
heat, it initiates a pre-purge lighting sequence. A red LED will blink once after about two (2) or
three (3) seconds to give notification that the lighting sequence has started. After about thirty (30)
seconds, two (2) events occur; 1) a high-voltage electrical signal will be sent to the Spark Rod
(SR) from the Spark Terminal. The high voltage jumps across a gap in the SR creating a spark that
can be heard, although the IC only produces this spark for four (4) seconds. 2) A VDC (+) will be
sent from terminal IC6 to Gas Valve V1-V2 via CB2 and CB3. The V1-V2 valve will open, allow-
ing fuel to flow into the burner. When the two events occur, spark and fuel flow, ignition will oc-
cur. When flame is sensed by the FS, a DC signal is sent to IC10. The IC uses this DC current to
prove ignition. A minimum of 0.7 μA DC is required to maintain operation. If the Burner fails to
light, the IC will reattempt ignition two (2) more times before the LED will flash three (3) times,
repeatedly, going into lockout.
1 3
2
1) P1
1) Alarm (Australian and Korean models only)
2) +24 VDC In
3) Not Used-Manual Reset
4) Call For Heat
5) Ground In
6) +24 VDC Sent To V1
7) Not Used-Digital Output
8) Not Used
9) Burner Ground
10) Signal Wire To Flame Sensor
2) P2- Not Used
3) Spark Terminal
To Next Page
Loading...
