50 Installation and maintenance manual ecoTEC
• Mount the new burner with a new gasket. Make sure
that the nose on the burner window grips onto the
gasket in the groove in the burner.
• Install the compact thermo module as described in
Section 7.2.4.
• After completing the work, check for gas leaks and
perform a function check (see Section 7.6)!
9.3 Replacing fan or gas fittings
Danger!
Before replacing the component, comply with
the safety instructions in Section 9.1.
• Disconnect the appliance from the mains as described
in Section 9.1, and close the maintenance tap in the
gas supply pipe.
• Remove the air intake pipe (Fig. 7.1, Pos. 2).
• Loosen the gas supply pipe on the gas fitting (Fig. 7.2,
Pos. 3).
1
3
2
4
Fig. 9.2 Dismantling fan with gas fitting
• Pull out the plug (4) from the gas fitting.
• Pull out the plug (3) from the fan module.
• Loosen the three screws (2) on the compact thermo
module (1).
• Remove the complete “gas fitting/fan” unit.
5
Fig. 9.3 Gas fitting/fan screwed joint
• Loosen both fixing screws (5) on the gas fitting and
remove the fan from the gas fitting.
• Replace the defective component.
Caution!
Mount the gas fitting and the fan in the same
position as before.
• Screw on the fan with the gas fitting. Please use new
seals.
• Install the complete “gas fitting/fan” unit in reverse
sequence.
• After completing the work, check for gas leaks and
perform a function check (see Section 7.6)!
9.4 Replacing expansion tank
Danger!
Before replacing the component, comply with
the safety instructions in Section 9.1.
• Disconnect the appliance from the mains as described
in Section 9.1, and close the maintenance tap in the
gas supply pipe.
• Close the maintenance cocks in the heating supply and
return and empty the appliance.
9 Replacing components
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