42
Series 49
Installation, Operating & Service Instructions
111368-04 - 1/22
CAUTION
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation. Verify
proper operation after servicing.
DANGER
Explosion Hazard. Electrical Shock Hazard.
Burn Hazard.
This boiler uses flammable gas,
high voltage electricity moving parts, and steam
under pressure. Assure that all gas and electric
power supplies are turned off. Make sure boiler
is not under pressure and temperature is cool
before attempting any disassembly for service.
Do not rely solely on pressure gauge to make
this determination.
Annual Inspection
Vent system
Boiler flue passages
Burners
Steam piping
Pressure gauge
Relief valve operation
Gas piping
Air openings
Pilot flame
Main burner flame
Gas inlet pressure
Gas outlet pressure
Annual Test
Gas input rate to boiler
Manual reset LWCO (if equipped)
Manual pressure limit (if equipped)
Combination gas valve shutdown test
Vent damper operation (if equipped)
Auto reset LWCO
Auto reset pressure limit
Thermostat operation
CO detector operation
Boiler water quality test
1. Inspection and service should be conducted
annually. Turn off electrical power and gas supply
while conducting service or maintenance. Follow
operating instructions TO TURN OFF GAS TO
APPLIANCE. See Figure 10-1.
2. Inspect vent system.
A. Remove obstructions in vent pipe and
chimney. Inspect masonry chimney liner/
Repair or replace defects and/or deterioration.
B. If masonry chimney is lined, verify lining is in
good condition and there are no openings into
chimney.
C. Remove soot accumulations with wire brush
and vacuum.
D. Repair or replace deteriorated vent pipe and
vent accessories.
E. Inspect piping to determine that it is
adequately supported. Repair sags.
F. Repair leaking joints.
3. Inspect boiler flue passages for blockage or soot
accumulation.
A. Remove vent pipe, vent damper (if equipped),
draft hood and BVS.
B. Remove top panels.
C. Remove canopy.
D. Remove baffles.
E. Using flashlight, examine all flue passageways.
i. If passageways are free of soot and
obstruction, replace canopy, secure and
seal.
ii. If passageways need cleaning, remove
burners as described in Paragraph 4.
Using long handle wire or bristle flue brush
and vacuum, brush flueways thoroughly
from top of boiler. Avoid changing
combustion chamber insulation with brush.
F. Install baffles.
G. Install new gasket material (See Section 16:
Service Parts). Install canopy.
H. Install jacket top panel, draft hood blocked
vent switch, vent damper (if equipped), and
vent pipe.
13
Service and Maintenance
(continued)
WARNING
This boiler should be serviced by a qualified installer, service agency or gas supplier. Inspections should be
performed at intervals specified in this manual. Maintain manual in a legible condition.
• Keep boiler area clear and free of combustible materials, gasoline and other flammable vapors and
liquids.
• Do not place any obstructions in boiler room that will hinder flow of combustion and ventilation air.
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