Cleaning The Condensate Ducts And The Condensate Siphon; D Danger - Vaillant ecoTEC VU 656/4 Installation And Maintenance Instructions Manual

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Fig. 8.5 Installing the compact thermal module
• Insert the compact thermal module (6) into the heat
exchanger (1).
• Tighten the six nuts (4) including the retainer for the
air intake pipe crosswise until the burner door is
uniformly seated on the contact surfaces.
• Make sure the blue sealing ring in the air intake pipe is
positioned correctly in the seal face.
• Insert the air intake pipe (2) onto the intake stubs and
fasten the pipe with the retaining screw (3).
• Plug on the ignition wire and the ground connection.
• Plug in the cable (7) to the coupling plug in the feed
to the fan motor, the PWM signal cable on the bottom
of the fan (8) and the cable to the gas valve (10).
• Connect the gas supply (9) with a new seal to the gas
valve. Use the spanner flat at the flexible gas line to
hold up the gas valves.
Installation and maintenance instructions ecoTEC 0020029173_01
Inspection and maintenance 8
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2
3
4
5
6
Fig. 8.6 Checking for gas tightness
7
Caution!
a
Open the gas feed and check the gas tightness
of the boiler with leak detector spray. Check
the screwed connection (1) particularly
carefully.
8.4 Cleaning the condensate ducts and the
condensate siphon
d Danger!
If the boiler is operated whith empty
condensate siphon, there is risk of poisoning
from escaping flue gases.
Therefore, fill up the siphon again after each
cleaning session.
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2
Fig. 8.7 Cleaning the condensate ducts
For the purpose of cleaning the condensate ducts, the
condensate hose (1) of the heat exchanger and the
complete condensate siphon (2) can be dismounted.
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