Installing The Compact Thermal Module; Cleaning The Condensate Siphon; Danger; H Danger - Vaillant ecoTEC VU 466/4 Installation And Maintenance Instructions Manual

8 Inspection and maintenance

8.3.4 Installing the compact thermal module

• Renew the seals (1) and (3) in the burner door
(see Fig. 8.5).
H

Danger!

Danger of combustion and damage due to
escaping hot flue gases!
Both seals (1) and (2) and the self-locking nuts
on the burner door must be replaced each time
the burner door is opened (e.g. during
maintenance and service work). If the insulation
layer on the burner door shows signs of damage
it must also be renewed (Item No. 210734).
• Insert the compact thermal module (2, Fig. 8.3) into
the heat exchanger (1, Fig. 8.3).
• Tighten the five nuts (7, Fig. 8.3) including the
retainer for the air intake pipe crosswise until the
burner door is uniformly seated on the contact
surfaces.
• Plug on the ignition wire (5, Fig. 8.3) and the ground
connection (6, Fig. 8.3).
• Plug on the cables (3, Fig. 8.3) at the fan motor and
the cable (4, Fig. 8.3) at the gas valve.
• Connect the gas supply with a new seal to the gas
valve. Use the spanner flat at the flexible gas line to
hold up the gas valves.
1
Fig. 8.6 Checking for gas tightness
a Caution!
Open the gas feed and check the gas tightness
of the boiler with leak detector spray. Check
the screwed connection (1) particularly
carefully.
• Make sure the blue sealing ring in the air intake pipe is
positioned correctly in the seal face.
• Insert the air intake pipe onto the intake stubs and
fasten the pipe with the retaining screw (2, Fig. 8.2).
40
8.4

Cleaning the condensate siphon

Fig. 8.7 Cleaning the condensate siphon
d Danger!
If the boiler is operated with empty condensate
siphon, there is risk of poisoning from escaping
flue gases.
Therefore, fill up the siphon again after each
cleaning session.
• Unscrew the lower section (1) of the condensate
siphon.
• Clean the bottom of the siphon by flushing it out with
water.
• Fill the lower section of the siphon about 3/4 with
water.
• Screw the lower section back to the condensate
siphon.
Installation and maintenance instructions ecoTEC 0020029172_03
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