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7. Checking and maintenance
Cleaning the heat exchanger pin side
WARNING
Ceramic fiber materials are used in the boiler. Care
should be taken when handling these materials.
Failure to heed and comply with these warnings could
result in severe personal injury.
1. Shut down the boiler:
a. Follow the instructions in the "To turn off gas to
appliance" on the boiler and lighting
instructions.
b. Unless the boiler will be exposed to freezing
temperatures, it does not need to be drained.
If antifreeze is used in the boiler system, do not
drain the boiler.
2. If the boiler has been firing, it will need to cool
down to room temperature.
3. To remove the front casing door, remove the two
screws at the lower front. Lift the casing door to
remove it from the boiler.
7.5 Specific maintenance operations
If the standard inspection and maintenance operations
have revealed the necessity to carry out additional
maintenance work, proceed as follows, depending on
the nature of the work:
7.5.1. Inspection of the ignition electrode
1. Remove the ignition electrode plug from the
ignition transformer.
i
The ignition cable is fixed to the ignition
electrode and therefore may not be removed.
2. Unscrew the 2 screws. Remove the unit.
3. Wipe off all traces of deposits using an abrasive
cloth.
4. Check the ignition electrode for wear. Replace if
necessary.
5. When reassembling the front cover alway replace
the gasket.
MCA-Pro ISM Rv.4.1 2/2017
2
1
Rinse the heat exchanger pins after the cleaning
1. Once the cleaning of the the heat exchanger pins
has been completed with the cleaning tool, rinse
the pins to flush out the remaining sediment.
2. Remove the remainder of the sediment from the
bottom of the heat exchanger using a vacume
cleaner fitted a narrow end piece.
3. Disconnect the condensate line located at the bottom
of the heat exchanger.
a. Loosen the hose clamps located at both ends
of the condensate line.
b. Remove the condensate line and place a
bucket or container underneath the trap
connection.
c. Fill the bottom of the heat exchanger with
water and flush out the remaining sediment to
the condensate outlet.
d. Flush the condensate line thoroughly with
water to remove any sediment particulates.
e. Remove the bucket or container and replace
the condensate line.
f. Follow the steps on pages 94+95 to check
the components and replace the burner cover.
MCA Pro 45/65/90/115
4
3
93
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