Cleaning The Condensate Siphon; Checking The Expansion Vessel - Vaillant ecoTEC plus 612 Instructions For Installation And Servicing

7 Inspection and maintenance
• Reconnect the HT lead (5) and earth lead (6) to the
spark electrode.
• Insert the cables (8) on the fan motor and the cable
(7) on the gas fitting.
1
2
3
Fig. 7.7 Refitting the gas supply
• Reconnect the gas supply (3) to the gas valve, ensur-
ing that a new sealing washer is used and correctly
located. Use the spanner flat at the flexible gas line to
hold the gas fittings.
11
Fig. 7.8 Testing the gas supply for soundness
• Turn on the gas supply and test for soundness. Check
especially the screwed connections (3) and (11).
• Refit the air inlet pipe, ensuring that the blue seal in
the air intake pipe is correctly located.
7.3

Cleaning the condensate siphon

Danger!
Note that if the boiler is run with an empty
condensate trap there is a danger that fumes
might escape into the room and cause poison-
ing. For this reason, it is important to ensure
that the trap is topped up each time the unit is
cleaned.
40
• Remove the lower part (1) of the condensate siphon by
turning the bayonet catch in anticlockwise direction.
• Clean the siphon part section by rinsing it out with
water.
• Fill the lower part with water until about 10 mm below
the upper edge.
• Fasten the lower part again on the condensate siphon.
Fig. 7.9 Cleaning the condensate siphon
7.4

Checking the expansion vessel

Fig. 7.10 Checking expansion vessel admission pressure
Note
It is not necessary to perform this check every
year – a check every three years is sufficient.
Instructions for installation and servicing ecoTEC / 839592_09
1
1