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9 Inspection and maintenance
4.
Rinse away any loose dirt with a sharp jet of water or
use a plastic brush. Do not point the water jet directly
at the heat insulation (1) on the back of the heat ex-
changer.
◁
The water flows via the condensate siphon and out
of the heat exchanger.
9.7
Checking the burner
▶
Check the surface of the burner (1) for damage. If you
see any damage, replace the burner.
9.8
Cleaning the condensate siphon
1.
Remove the lower section (2) of the siphon (1) by turn-
ing the bayonet fitting anti-clockwise.
2.
Flush the lower section of the condensate siphon with
water.
3.
Fill the lower section with water up to about 10 mm be-
low the upper edge.
4.
Screw the lower section back onto the condensate si-
phon.
34
9.9
Installing the compact thermal module
1
2
3
4
5
1
6
7
8
1.
Attach the compact thermal module (5) to the heat ex-
changer .
2.
Tighten the four nuts (1) in a cross-wise pattern until the
burner door (2) sits tightly against the bearing surfaces.
–
Tightening torque: 6 Nm
3.
Reconnect the plugs (3), (4), (6), (7) and (8).
4.
Connect the gas line with a new seal.
5.
Open the gas isolator cock.
6.
Make sure that there are no leaks.
7.
Check whether the air intake pipe's sealing ring has
1
been fitting correctly.
8.
Reconnect the air intake pipe to the intake nozzle.
2
9.
Secure the air intake pipe with the retaining screw.
10. Check the gas connection pressure (gas flow pres-
sure). (→ Page 24)
9.10
Draining
9.10.1 Draining the unit's heating circuit
1
1.
Close the service valves in the heating flow and in the
heating return.
2.
Remove the front casing. (→ Page 12)
3.
Move the electronics box into the upper position
(→ Page 12).
4.
Connect a hose to the drain cock (1) and guide the free
end of the hose to a suitable outflow location.
5.
Open the drain cock to fully drain the unit's heating cir-
cuit.
Installation and maintenance instructions ecoCOMPACT 0020181421_04
2
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