Vaillant ecoTEC plus SERIES, Instructions For Installation And Servicing

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Installation and Servicing ecoTEC plus
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5 Commissioning (Part I)
5 Commissioning (Part I)
Please ensure the “Benchmark” commissioning check
list is completed and left with the user.
5.1 Preliminaries - all systems
A competent person should carry out commissioning,
in accordance with the current issue of BS 6798.
Remove the two screws on the inner case then lift the
case upwards off the two top retaining dowels.
Drop down the electronics box into the service
position.
Remove the four screws from the chassis panel.
Remove the chassis panel by pulling it out at the top
from its retaining slots, see fig 5.1.
Note!
When replacing chassis panel ensure the
bottom fits behind lip.
Make sure that the system has been thoroughly
flushed out with cold water, prior to filling the system
refer to section 3.15 inhibitor cleaning.
Refill the system with water, making sure that all the
air is properly vented from the system and pump.
5.1.1 Gas supply
Isolate the boiler from the mains electrical supply.
The complete gas installation including the gas meter
must be isolated, tested for soundness and purged in
accordance with BS 6891, in IE the current edition of
IS 813.
The gas supply to the boiler can be purged by
slackening the union connection on the gas service
valve beneath the boiler, see fig 5.2. Ensure that there
is adequate ventilation, extinguish all naked flames
and do not smoke whilst purging.
After purging, the gas service union connection must
be re tightened and tested for soundness. (The boiler
itself does not require purging as this will be done by
the automatic burner sequence control).
The gas valve is factory set for natural gas (G20) and
should need no adjustment.
The supply pressure should be checked when the
boiler is firing at full rate. Check the inlet pressure at
the pressure test point on the gas valve shown in fig
5.3 the values should be between those shown below.
Natural gas:
DO NOT proceed with the adjustment or
attempt to put the unit into service if the inlet
working pressure lies outside the 17-25 mbar
range.
LPG:
DO NOT proceed with the adjustment or
attempt to put the unit into service if the inlet
working pressure is lower than 34 mbar.
Caution!
Before operating the boiler check the type
plate and ensure that the correct gas type
Fig. 5.1 Inner case and chassis removal
Fig. 5.2 Gas service valve
RETAINING
DOWEL (2 OFF)
SCREW
(2 OFF)
SCREW
(4 OFF)
INNER
CASE
CHASSIS
PANEL
ELECTRONICS
BOX
90
°
GAS
SERVICE
VALVE
UNION
CONNECTION
OFF
ON