Installing The Flue System; Fitting The Boiler; Removing The Front Case; General Instructions For Heating System - Vaillant ecoTEC plus 612 Instructions For Installation And Servicing

4 Boiler installation sequence
4.5

Installing the flue system

• Install the flue system (refer to the seperate air/flue
duct installation instructions).
4.6

Fitting the boiler

• Lift the boiler (3) up to the wall so that it is slightly
above the hanging bracket (1).
Note
Lift the boiler from either side at the bottom
edge
• Lower the boiler slowly onto the hanging bracket so
that the cross member at the rear of the boiler fully
engages onto the hanging bracket.
4.7

Removing the front case

Fig. 4.4 Removing/fixing the front case
To remove the front section of the case, proceed as fol-
lows:
• Loosen the screw (1) on the bottom of the unit.
• Push in the two retaining clips (2) on the bottom of
the appliance until the case is released.
• Grasp the front case by its bottom edge, pull it towards
the front and remove it by lifting it off the unit.
4.8

General instructions for heating system

Caution!
Thoroughly cleanse the heating system before
connecting the appliance!
By doing that, residue such as welds, cinder,
hemp, putty, rust, rough dust and similar sub-
stances are removed from the pipes. Otherwise
such substances can be deposited in the appli-
ance and cause damage.
20
2
1
- The appliance is fitted with an expansion vessel (10
l/0.75 bar).
• Before assembling the appliance check if this volume
is adequate. If not, an extra expansion vessel must be
installed, see section 3.10.5.
4.9

Gas connection

Note
With the spacer frame (Art. No 308 650), the
pipes can be fitted vertically upwards behind
the appliance. The distance of the appliance
from the wall thus increases by 65 mm.
Danger!
The gas connection may only be made by a
competent person.
The legal directives and the local regulations
for gas supply companies must be observed.
Caution!
Ensure a stress-relief assembly of the gas
pipes to avoid leakages!
Caution!
The gas regulating block may be tested for
leakage only with a maximum pressure of 150
mbar!
Higher testing pressures can damage the gas
fitting.
Caution!
When making final connection to the boiler, if
using soldered fittings, extra care should be
taken to avoid damage to isolation valves
through heat transfer.
Fig. 4.5 Fitting the gas connection (example ecoTEC plus com-
bination boiler)
Instructions for installation and servicing ecoTEC / 839592_09
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