Commissioning Part I; Preliminary Electrical Checks; Gas Supply; Cold Water Supply - Vaillant ecoTEC SERIES Instructions For Installation And Servicing

5 Commissioning Part I

5 Commissioning Part I
5.1

Preliminary electrical checks

Check the electrical installation by carrying out short
circuit, earth continuity and resistance to earth tests
and a check for correct polarity.
5.2

Gas supply

The complete gas installation including the gas meter
must be inspected, checked for leaks 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 gas service valve beneath the boiler.
Ensure that there is adequate ventilation, extinguish all
naked flames and do not smoke whilst purging. After
purging, the gas service valve connection must be
retightened and checked for leaks (the boiler itself does
not require purging as this will be done by the automatic
burner sequence control).
5.3 Cold water supply (ecoTEC combination boilers
only)
Open all domestic hot water taps supplied by the boiler,
turn on the mains water supply to the boiler and open
the mains water isolating valve below the boiler. Water
will now flow through the boiler to the hot taps. Starting
with the lowest tap supplied, turn the hot taps off one at
a time until the hot water pipework is purged of air.
Check all hot and cold water pipework for leaks.
5.4

Filling and bleeding the heating system

Note
The P.6 test program is for filling the heating
system: The diverter valve (combination boilers
only) moves to the centre position, the pump
does not run and the appliance does not go into
heating mode. Use the test program as
described in Section 8.2.
The P.0 test program is for bleeding the hot
water circuit (as well as the DHW circuit on
combination boilers): The appliance does not go
into heating mode; the pump runs
inttermittently and bleeds the two circuits in
succession. Use the test program as described
in Section 8.2.
Note
The ecoTEC appliances come with a manometer
and a digital pressure indicator.
The manometer allows you to quickly check
whether the filling pressure is in target range
or not even when the appliance is turned off.
If the appliance is in operation, you can display
the exact pressure by pressing the "-" (2).
For the heating system to operate properly, the
indicator on the manometer (1) must be in the dark grey
area when the system is cold.
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This corresponds to a filling pressure between 1.0 and
2.0 bar. If the pointer is in the light grey area, refill
water.
If the heating system extends over several storeys, the
system may require a higher filling pressure.

5.4.1 Checking the filling pressure of the heating

system

plus
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Fig. 5.1 Checking the filling pressure of the heating system

5.4.2 ecoTEC plus combination boiler filling loop

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Fig. 5.2 Filling device ecoTEC plus combination boiler
Instructions for installation and servicing ecoTEC 839592_12
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