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Maintenance
Oil heating systems require annual service performed by a qualied, professional service
agency. The 7505 primary control should be inspected during this service routine ac-
cording to the following checklist:
NOTE: The 7505 control has no serviceable internal parts. Do not attempt to
remove cover.
Inspect the exterior of the control. Replace the control if there is any sign of impact
damage, water or corrosion.
Use a multimeter to test the line voltage at control L1 and L2. It should be 102
- 132 Vac.
Inspect all external wiring for secure connections and verify insulation integrity.
Verify the control lockout and operation sequence, (Reference Startup/Checkout
section).
Observe a full operating cycle to prove the sequence and timings are correct.
Replace any control that does not meet listed specications with an equivalent
replacement unit.
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