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!
DANGER
Before servicing, turn off electrical power to boiler
at service switch. Close manual gas valve to turn
gas supply OFF to boiler. Failure to comply will
result in death or serious injury.
!
!
CAUTION
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and
dangerous operation.
Note
Verify proper operation after servicing.
Perform regular service and maintenance by
Note
qualified service agency at least once every 12
months to assure safe, trouble free operation
and maximum efficiency.
11.1 Beginning of Each Heating Season
• Check boiler area is free from combustible materials,
gasoline, and other flammable vapors and liquids.
• Visually inspect combustion air and vent piping for proper
operation. Check for and remove any obstruction to flow
of combustion air or vent gases. Immediately repair or
replace pipe showing deterioration or leakage. Reassemble
per instructions in section 6. Ensure proper reassembly and
resealing of system.
• Visually inspect condensate drain line for proper operation.
Checking for deteriorated or plugged condensate drain line.
Verify condensate trap drains freely.
• Test safety relief valve for proper operation. Refer to valve
manufacturer's instructions packaged with relief valve.
• Examine flue passages in heat exchanger, burner,
condensate lines, and cleaning (if necessary) by following
instructions in "Annual Examination and Cleaning of Boiler
Components" in this section.
11 - GENERAL MAINTENANCE AND CLEANING
FIGURE 11-1 Sight Glass - 050/075/100/150/200 MBH
Sight Glass
FIGURE 11-2 Sight Glass - 299 MBH
46
Sight Glass
PN 240011320 Rev. G 10/01/2021]
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