ecoTEC pro - Vaillant

12.3.6 Installing the compact thermal module
a
Danger!
Risk of death and risk of damage caused
by hot flue gas!
If you do not renew the seal and the selflocking
nuts on the burner door, hot flue
gases may escape and cause personal
injury and material damage.
> Replace the seal each time you open the
burner door.
> Replace the self-securing nuts each time
you open the burner door.
> If the burner flange insulation on the
module shows signs of damage other
than small cracks it must be replaced
(article number 193 595).
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12.10 Installing the compact thermal module
> Attach the compact thermal module (4, ¬ fig. 12.10) to
the heat exchanger (1, ¬ fig. 12.10).
> Tighten the four nuts (3, ¬ fig. 12.10) crosswise until the
burner door fits closely and uniformly onto the mating
surfaces (If a torque spanner is available, set at 6 Nm).
> Attach the plug of the ignition line (10, ¬ fig. 12.10) and
the ground connection (9, ¬ fig. 12.10) to the ignition
electrode.
> Attach the plug (5, ¬ fig. 12.10) to the fan motor.
> Attach the plug (8, ¬ fig. 12.10) to the gas valve.
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Inspection and maintenance 12
12.11 Secure the gas pipe against twisting
> Tighten either the cap nut (6, ¬ fig. 12.10) on the gas
valve or the cap nut (7, ¬ fig. 12.10) between the gas
pipes. Use a new seal for this.
> Secure the gas pipe against twisting (¬ fig. 12.11) by
holding the pipe against the spanner flat when tightening
the cap nut.
> Open the gas isolator cock on the boiler and ensure
there are no leaks.
> Check that the sealing ring in the air intake pipe is positioned
correctly in the seal seat.
> Insert the air intake pipe (1, ¬ fig. 12.3) back into the
intake stub.
> Attach the air intake pipe using the retaining screw (2,
¬ fig. 12.3).
12.3.7 Checking the charge pressure of the
expansion vessel
12.12 Checking the charge pressure of the expansion vessel
The service valves of the boiler must be closed.
> Measure the charge pressure of the expansion vessel at
the testing nozzle (1) of the vessel with the boiler depressurised.
> Top up the expansion vessel at a pressure of less than
0.75 bar in accordance with the static height of the heat-
Installation and maintenance instructions ecoTEC pro 0020129672_03 53
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