- Disconnect cables at fuel pump and glow element of glow-spark plug.
- Turn heater on. After about 130-200 seconds (at nominal temperature and 68 F/30 C ambient temperature), the safety switch should break the circuit to the relay (contact A).
- If the safety switch has operated within the required time, press lever on safety switch in direction of arrow and turn heater on again.
Honeywell safety switch only:
If a correction has to be made, move adjusting screw through slot in lever as follows:
Response time too long: Turn screw clockwise.
Response time too short: Turn screw counterclockwise.