ecoTEC plus 937 installation and maintenance manual
46
10
11
9
8
4
5
6
7
Fig. 7.2 Removal of the thermo-compact module
• Pull the ignition cable (
5
) and the earth wire (
6
) off
the ignition electrode.
• Unscrew the four nuts (
4
) from the burner door.
• Pull the two electrical connections (
7
and
8
) off the
fan and the gas valve.
• Pull the burner, gas valve and fan assembly (
9
)
forwards off the integral condensation heat-
exchanger (
10
).
h
Note!
You can hang the thermo-compact module on
the hook (11) whilst you perform the
maintenance work.
• After removing the thermo-compact module clean the
components in accordance with the following
description.
7.2.2 Cleaning the integral condensation heat-
exchanger
a
Caution!
Protect the electronics box from water
splashes.
3
4
1
2
Fig. 7.3 Cleaning the integral condensation heat-exchanger
• Dismantle the compact thermo module as described
under 7.2.1.
a
Caution!
Danger of damage to the primary heat-
exchanger!
Do not attempt to release or tighten the four
screws (1).
After removal of the burner and fan assembly you can
check the primary heat-exchanger (
4
).
• Remove the loose deposits from the heating coils (
3
)
with a soft brush and a jet of water. Make sure that
water is kept away from all electrical components. The
water used to clean the primary heat-exchanger runs
away through the condensate siphon. Avoid pointing
the water jet directly at the insulating surface (
2
) on
the back of the heat exchanger.
If necessary, the heat-exchanger can be cleaned using
ordinary vinegar.
7 Inspection and maintenance
