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Finned copper tube gas boilers & water heaters – Boiler Manual
32
F
F
Controls
Use the “GENERAL OPERATION” and “CHECKING AND
ADJUSTMENTS” sections of this manual for reference.
1. Check the operating controls for proper operation.
2. A fl oat type low water cutoff device must be fl ushed out per
the manufacturers’ instructions. Th e probe on a probe low water
cut off must be removed, cleaned and inspected at least once
a year. Ensure that the low water cutoff s operate properly. If not,
replace them.
3. Th e fl ow switch contacts must be open when water fl ow is not
present.
4. Th e relief valve should not weep or discharge water at normal
system pressure. If it does, contact a qualifi ed service technician
to have it inspected. NEVER try to clean or repair the relief
valve! If the valve fails to operate properly, have it replaced!
5. Th e aquastat high limit controls the maximum water temperature
in the boiler. If the water temperature reaches the set temperature
before the demand for heat has been met, the aquastat high limit
should shut the boiler off . Th e water temperature should never
exceed the maximum set point of
250°F
,
121°C
, for
boilers and
210°F
,
99°C
for water heaters. Th e aquastat high limit cannot be
repaired. If it fails to function properly, replace it.
6. Visually check the pilot and main burner fl ames to ensure proper
operation.
A yellow, fl oating fl ame indicates a lack of combution
air. Do not operate the boiler/water heater until the
problem is solved or severe personal injury or death
may occur!
Figure 20
Main Burner Flame
32