Vaillant ecoTEC pro 24, Instructions For Installation And Servicing

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Instructions for installation and servicing ecoTEC / 839592_09
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 slack-
ening 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 8.4.
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 inttermit-
tently and bleeds the two circuits in succes-
sion. Use the test program as described in
Section 8.4.
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 indica-
tor on the manometer (
1 ) must be in the dark grey area
when the system is cold. This corresponds to a filling
pressure between 1.0 and 2.0 bar. If the pointer is in the
light grey area, please 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
bar
bar
1
2
plus pro
Fig. 5.1 Checking the filling pressure of the heating system
5.4.2 ecoTEC plus combination boiler filling loop
3
1
2
4
Fig. 5.2 Filling device ecoTEC plus combination boiler
5 Commissioning Part I