Commissioning Part I; Preliminary Electrical Checks; Gas Supply; Cold Water Supply (Only 800 Series) - Vaillant ecoTEC PLUS SERIES Installation And Maintenance Manual

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 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 (only 800 series)

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 the heating system

To fill up and to refill the heating system, you can nor-
mally use tap water. However in exceptions, the water
quality might not be suitable for filling in the heating
system (heavily corrosive or extremely calciferous
water).
32
5.4.1 Checking the filling pressure of the heating
system
plus
2
bar
Fig. 5.1 Checking the filling pressure of the heating system
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. 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.
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Installation and maintenance manual ecoTEC
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