Hubbell Electric Heater Company WATER HEATER DF - Manual (Page 20)

20
RECOMMENDED PERIODIC TESTING
TESTING
ITEM
HOW
OFTEN
COMPLETED
BY
REMARKS
Gauges, monitors and operating log Daily Operator Make visual inspection and record readings
Instrument and equipment settings Daily Operator Make visual check against recommended
specifications
Weekly Operator Verify factory settings
Semiannually Service Tech Verify factory settings
Firing rate
Annually Service Tech Check with combustion test
Flue, vent, stack or outlet dampers Monthly Operator Make visual inspection of linkage; check for
proper operation
Igniter
Weekly Operator Make visual inspection, check flame signal
strength if meter-fitted (see "Combustion Safety
Controls")
Fuel valves: pilot and main
(primary and secondary) Weekly Operator Operate burner. Using a manometer or pressure
gauge, check pressure to the burner as required
on rating label.
Pilot and main gas or oil train Annually Service Tech Perform leakage tests - refer to instructions
Combustion safety controls (flame
failure)
Weekly Operator Close manual fuel supply for the pilot and main
fuel valve(s); check safety shutdown timing; log
result.
Flame signal strength
Weekly Operator With flame signal meter installed, read and log
for both pilot and main flames. Notify service
organization if readings are very high, very low
or fluctuating. Refer to instructions for nominal
values
Pilot turndown test
As required /
annually
Service Tech Required after any adjustment to flame scanner
mount or pilot burner; verify annually - refer to
instructions.
Low-water fuel cutoff and alarm Daily/weekly
Semiannually
Operator Refer to instructions and perform a slow drain
test.
High limit safety thermostat control Annually Service Tech Refer to instructions
Operating thermostat control Annually Service Tech Refer to instructions
Vent draft fan, and air pressure
switches Monthly Operator Refer to instructions
High and low gas pressure interlocks Monthly Operator Refer to instructions
High and low oil pressure interlocks Monthly Operator Refer to instructions
Fuel valve interlock switch Annually Operator Refer to instructions
Low fire start interlock Annually Operator Refer to instructions
Automatic changeover control (dual
fuel) At least
annually
Service Tech Under supervision of gas utility
T&P valves
As required Operator In accordance with procedure in Section VI
ASME Boiler and Pressure Vessel Code,
Recommended Rules for Care and Operation of
Heating Boilers.
Inspect Burner Components Semiannually Operator Refer to burner instructions