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7. Checking and maintenance
6. Refit all parts, replacing those that are damaged.
7.5.2. Replacing the non-return valve
Replace the nonreturn valve when faulty or when the
maintenance kit contains one. To do this, proceed as
follows:
1. Remove the air inlet flue on the Venturi.
2. Loosen the union on the gas block.
3. Remove the plugs from the fan.
4. Remove the plugs from the gas block.
5. Dismantle the fan.
6. Completely remove the fan/mixing elbow unit.
7. Replace the non-return valve located between the
mixing elbow and the fan.
8. To re-assemble, perform the above actions in
reverse order.
94
MCA Pro 45/65/90/115
3
4
1
2
5
7
2x
6
8
MCA-Pro ISM Rv.4.1 2/2017
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