420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21
93
Figure 119 - Remove the Heat Exchanger
Figure 120 - Disconnect the Gas Line
Replacing the Gas Valve
1. Remove the electrical connections from the gas valve.
2. Remove the two screws under the combustion assembly and
disconnect the gas line from the gas valve.
3. Remove the gas valve.
4. Reinstall the new gas valve in reverse order.
Replacing the Main Heat Exchanger
1. Drain the boiler and remove the combustion assembly as
described in Cleaning the Heat Exchanger Combustion Chamber.
2. Loosen and remove the CH relief valve.
3. Loosen and remove the CH relief valve pipe and gasket.
4. Remove the securing clips from positions a and b.
Figure 116 - Remove the CH Pressure Relief Valve
5. Disconnect the plastic pipes from the manual breather.
a
b
Figure 117 - Remove the CH Outlet Pipe
6. Disconnect the heating supply pipe.
7. Disconnect the condensate line.
8. Remove the clip and disconnect the connection line from the
heating return pipe.
Figure 118 - Remove the Condensate Pipe and CH Return Pipe
9. Remove the four screws to remove the heat exchanger.
10. Proceed in reverse order to install the new device.
