Installation manual

12.2.4. Ignition System
DSI Integrated Control Module (circuit board) - See FIGURE 29. The module
monitors the operation of the heater including ignition. The only replaceable com-
ponent is the 3 amp Type ATC or ATO fuse. If the fuse is blown, the problem is most
likely an external overload. Correct the problem and replace the fuse.
Do not attempt to disassemble the control module. However, each heating season
check the lead wires for insulation deterioration and good connections.
Proper operation of the direct spark ignition system requires a minimum ame sig-
nal of 1.0 microamps as measured by a microampmeter.
NOTE: For additional information and check out procedure on the direct spark
ignition system, refer to Paragraph 10 and the Troubleshooting Flow Chart in Para-
graph 12.3.
FIGURE 28 - Location of Controls
High Temperature
Limit Control
Gas Valve
Pressure
Switch
Venter
Vent Temperature
Limit Switch
Flame
Sensor
Ignitor
Fan
Motor
Control Panel Assembly
Door
Switch
Disconnect
Switch
Transformer
Time Delay Relay
Fan Motor Capacitor
DSI Integrated Control
Module (Circuit Board)
Venter
Motor Capacitor
FIGURE 29 - DSI
Integrated Control
Module (Circuit Board)
Only replaceable
part is a Type ATC
or ATO 3 amp fuse
(Color Code Violet),
P/N 201685
Form I-UEAS, P/N 221232 R11, Page 39