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12.4.6 Installing the compact thermal module
Danger!
a
Risk of death and risk of damage caused
by hot flue gas!
If you do not renew the seal and the self-
locking 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).
9
8
7
6
12.9 Installing the compact thermal module
> Attach the compact thermal module (2, ¬ fig. 12.9) to
the heat exchanger (1, ¬ fig. 12.9).
> Tighten the four nuts (9, ¬ fig. 12.9) 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 (7, ¬ fig. 12.9) and
the ground connection (8, ¬ fig. 12.9) to the ignition
electrode.
> Attach the plug (4, ¬ fig. 12.9) to the fan motor.
> Attach the three plugs to the gas valve (5, ¬ fig. 12.9).
> Attach the cable to the Venturi (3, ¬ fig. 12.9).
Installation and maintenance instructions ecoTEC plus 0020134833_01
Inspection and maintenance
12.10 Tightening the cap nuts on the gas valve
> Connect the gas supply (6, ¬ Fig. 12.9) to the gas valve
with a new seal.
1
When the cap nuts are being screwed to the gas valve,
counterhold the opposite side of the gas valve or screw
2
both cap nuts to the gas valve simultaneously.
> Open the gas isolator cock on the boiler and ensure
there are no leaks.
3
> Check that the sealing ring in the air intake pipe is posi-
tioned correctly in the seal seat.
4
> Insert the air intake pipe (1, ¬ fig. 12.3) back into the
intake stub.
> Attach the air intake pipe using the retaining screw (2,
5
¬ fig. 12.3).
12
67
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