LP-719 Rev. 000 Rel. 000 Date 6.25.20
83
Replacing the Fan
1. Remove the silencer and gas line as described in Cleaning the
Heat Exchanger Combustion Chamber.
2. Loosen the three [3] screws to release the Mixer (1) from the fan
(5). Ensure the O-Ring (4) is not damaged or deteriorating.
1 2 3
4
5
6
Legend:
1
- Mixer (when converting to
Propane, install the Mixer
included in the Natural Gas
to Propane Conversion Kit)
2
- Gas Diaphragm if applicable
(Models converted to
Propane require a Gas
Diaphragm - see Natural
Gas to Propane Conversion
Instructions)
3
- Gas Seal
4
- O-Ring
5
- Fan
6
- Fan to Air Inlet Channel
Gasket
Figure 85 - Removed Fan, Mixer, and Components
DANGER
!
Ensure that the correct gas diaphragm and mixer are used for
the correct fuel type for the boiler - Natural Gas or Propane. See
Conversion Kit Instructions. Failure to do so will result in substantial
property damage, severe personal injury, or death.
3. Loosen the three [3] screws to release the fan from the heat
exchanger.
4. Reassemble the mixer and fan assembly in the reverse order.
Ensure the O-Ring (4) is installed between the mixer and fan.
5. Reinstall the fan and combustion assembly components as
described in Cleaning the Heat Exchanger Combustion Chamber.
Ensure the gasket (6) is assembled between the fan and air inlet
channel.
DANGER
!
Failure to replace damaged or deteriorating gaskets or O-Rings will
result in exhaust gas leaks, substantial property damage, severe
personal injury, or death.
Replacing the Main Heat Exchanger
1. Drain the boiler and remove the combustion assembly as
described in
Cleaning the Heat Exchanger Combustion
Chamber.
2. Remove the exhaust vent adapter on the top of the boiler.
3. Remove the two (2) screws securing the CH relief valve pipe
assembly to the top of the boiler.
4. Remove the three clips on the automatic air purging device (b),
then remove the CH relief valve pipe (a) from the top of the
boiler.
5. Disconnect the bottom of the heating supply pipe (c) from the
hydraulic group, then from the automatic air purging device
(b).
6. Remove the automatic air purging device (b) from the heat
exchanger.
7. Disconnect the return pipe (e) from the top of the pump, then
remove the clip securing it to the heat exchanger and remove
it from the boiler.
a
c
Figure 86 - Remove the CH Pressure Relief Valve and CH Outlet Pipe
Figure 87 - Remove the Condensate Pipe and CH Return Pipe
b
d
e