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Part number 550-100-260/0520
129
ECO
®
Tec
GAS-FIRED WATER BOILER – 80/110/150/199 BOILER MANUAL
Cleaning heat exchanger flue side (continued)
Accessing the burner or heat exchanger, air silencer and gas valve removal. (See Legend above).
Boiler interior, (
Display, circuit board and display bracket removed
to see combustion components).
Boiler interior, (Air silencer and toe top piece of heat exchanger
insulation removed for clarity).
Gas valve from venturi disassembled to access the burner.
Blower and venturi disassembled to access the burner,
(Gas valve assembly removed for clarity).
Ignition electrode assembly.
Heat exchanger cover plate and components.
Burner and components
Legend for Figures 112 and 113
the gas valve, gas line and swivel nut (Item 5) onto the
venturi (Item 7) gas inlet. Inspect the gas valve flex
line, making sure there are no signs of wear or damage.
Replace if necessary. For LP models, confirm LP Gas
Orifice is inserted into venturi gas inlet before making
the connection.
11. Using two (2) wrenches reconnect gas valve to venturi
gas inlet.
12. Reinstall the air inlet silencer (Item 1) by pressing
it onto the venturi air inlet. Rotate into the normal
vertical position (see part A) of Figure 114, page 129.
13. Place silencer clip (Item 2) back onto the air inlet silencer/
venturi.
Perform a complete start-up procedure when
putting the boiler back into service. See page 97 and
all instructions for start-up and verification. Include
a soap suds leak test on all interior and exterior gas
piping after starting the boiler.
Air silencer
Air silencer retainer clip
Blower assembly
Gas valve
Gas pipe swivel nut
Fiber washer (light green)
Venturi assembly
Blower lock nuts 8mm (2)
Blower gasket
Cover plate
Combustion chamber cover
plate retainer nuts (4)
Heat exchanger insulation
Ignition electrode assembly
Burner
Burner gasket
Burner insulation
Burner retainer screws (3)
Inspection plate window
Bottom cover plate insulation w/
integrated seal
Burner tube
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