Instruction manual

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Figure 21 Heat exchanger upper rail screws
Vent System
 oroughly inspect the vent system for any signs of blockage,
corrosion or leakage. Immediately replace any unsound vent system
piping.
Controls
Use the “BOILER/WATER HEATER OPE TION” and
“CHECKING AND ADJUSTMENTS” sections of this manual
for reference.
1. Check the thermostat or operating controls for proper operation.
2. A  oat type low water cuto device must be  ushed out per
the manufacturers’ instructions.  e probe on a probe low water
cut o must be cleaned and inspected per the manufacturers’
instructions. Ensure that the low water cuto s operate properly.
If not, replace them.
3.  e  ow switch contacts must be open when water  ow is not
present.
4.  e relief valve should not weep or discharge water
at normal system pressure. If it does contact a quali 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.  e aquastat high limit controls the maximum water temperature
in the boiler. It should be set at least 20°F, 11°C above the
operater setpoint. If the water temperature reaches the set
temperature before the demand for heat has been met, the
aquastat high limit should shut the boiler o .  e water
temperature should never exceed the maximum set point of
240°F, 116°C.  e aquastat high limit cannot be repaired. If
it fails to function properly replace it.
6. Visually check the pilot and main burner  ames to ensure proper
operation, see Figure 22.
A yellow,  oating  ame indicates a lack of combustion
air. A li ing  ame indicates too much combustion air.
Do not operate the boiler/water heater until the
problem is solved or severe personal injury or death
may occur!
Figure 22 Pilot & main burner  ame