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SBD TANK TYPE HEATERS
SERVICE HANDBOOK
Technical Training Department
Ashland City, TN ©2003
38
STEP 17 IID MODULE TEST
Pilot is lit - Sparking has stopped.
STEP 17. IID MODULE TEST (Power to the Main Valve). Using a multimeter, test for
24 VAC between terminal MV on the IID and 24V (GND).
NEHT FI
24 VAC is not present: • Replace the IID module. Conduct Step
18 before applying power to
replacement module.
24 VAC is present: • Go to step 18.