Hubbell Electric Heater Company WATER HEATER DF User Manual
Page 19
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RECOMMENDED PERIODIC INSPECTION
DAILY
1. Inspect area around water heater for moisture. If present, determine if cause is condensation
or leakage.
a. If cause is condensation - May be due to very cold incoming water. Consider
installation of intra-tank circulator; contact manufacturer for details.
b. If cause is leakage - May be due to leaking fitting; repair as soon as possible. If tank
leak is suspected, contact manufacturer.
2. Inspect vent for corrosion. If present, replace corroded vent section as soon as possible.
Determine if cause is low temperature of combustion products (less than 280º F net flue
temperature), or the presence of contaminated combustion air. Correct either condition
immediately.
MONTHLY
1. Drain heater, remove hand hole cover and inspect for sediment accumulation. Remove any
sediment and inspect more frequently to determine an appropriate schedule for sediment
removal. NOTE: FAILURE OF THE WATER HEATER DUE TO SEDIMENT OR
SCALE ACCUMULATION IS NOT COVERED BY THE WARRANTY.
2. Test combustion products for the presence of carbon monoxide (CO) above a 200 ppm
concentration. If necessary, adjust burner to reduce CO concentration.