88
Call 1-
800-347-9575
for Technical Support
Preheater Plug Pin Diagram
Oil Schematic
Wide Key at Top
Standby Heater - Neutral
Standby Heater
– 115V
Preheater Thermostat
Run Heaters
– 115V
Run Heaters - Neutral
(Center Pin Not Used on 200B.
Used for Solenoid Valve on
375B and 500B.)