andrews MAXXflo EVO CWH 90/302 Installation And Maintenance Manual page 66

• Remove the 6 heat exchanger door bolts and remove the whole burner assembly and put to one side.
• Unscrew the flow and return pipework from the heat exchanger.
• Unscrew the flow and return sensors form the heat exchanger and retain
• Disconnect the condense drain connection by releasing the jubilee clip and pulling the pipe off
• Remove the 6 screws of the heat exchanger retaining clamps and remove the clamps
Heat exchanger
connection
CAuTION
Warning this item is heavy - Before releasing the brackets ensure support is available
• Carefully lift out the heat exchanger
• Fitting is the reverse
CAuTION
After refitting ensure no air is present in the heat exchanger by running the unit with the gas turned
off until the heat exchanger is operating quietly
Maintenance
Removed burner
assembly
66
Jubilee clip
Condense hose
Retaining clamp
MAXXflo EVO