Gas Supply; Air Supply; Compartment Ventilation; Electrical Supply - Vaillant ecoTEC pro Installation And Maintenance Instructions Manual

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> Please ensure that the boiler is room sealed or in a sepa-
rate installation room if
– the combustion air supply contains the aforemen-
tioned substances,
– you install the boiler in hairdresser salons, painter's or
joiner's workshops, cleaning businesses or similar.
> Do not route the combustion air through an old oil fur-
nace chimney, as this can also cause corrosion.

2.5.3 Gas supply

An existing gas meter should be checked to ensure that it is
capable of passing the rate of gas supply required.
Installation pipes should be fitted in accordance with
BS 6891, in IE in accordance with the current issue of
IS 813. Pipework from the meter to the boiler must be of an
adequate size.
Do not use pipes of a smaller size than the boiler gas con-
nection. The complete installation must be tested and
purged in accordance with:
– IGE/UP /1B for systems up to 0.035 m
– for larger systems IGE/UP/1A and
– for LPG installations refer to BS 5482 - 1 or
– IGE/UP1 Edition 2 for larger volume installations.

2.5.4 Air supply

Detailed recommendations for air supply are given in
BS 5440: Part 2. It is not necessary to have an air vent in
the room or internal space in which the boiler is installed.

2.5.5 Compartment ventilation

The boilers are very high efficiency appliances. As a conse-
quence the heat loss from the appliance casing during
operation is very low. Compartment ventilation is required
if the flue used is not concentric and air is supplied from
the room or compartment the boiler is installed in.

2.5.6 Electrical supply

Danger!
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Risk of death from electric shock.
If the appliance is not earthed, it may hold
voltage if a defect occurs.
> Earth the appliance.
A 230 V, ~ 50 Hz single phase electricity supply fused to 3
Amp. must be provided in accordance with the latest edition
of BS 7671 (IEE Wiring Regulations) and any other local reg-
ulations that may apply. In IE reference should be made to
the current edition of the ETCI rules. The method of con-
nection to the mains electricity supply must provide a
Installation and maintenance instructions ecoTEC pro 0020129672_03
means of completely isolating the boiler and its ancillary
controllers. Isolation is preferably by the use of a fused
three pin plug and unswitched shuttered socket outlet, both
complying with the requirements of BS 1363. Alternatively,
a 3 Amp. fused doublepole switch with a 3 mm contact
opening on both poles may be used.

2.5.7 Water supply Combination boilers

Designers and installers must ensure that all pipe work and
fittings connected to the ecoTEC complies with the neces-
sary water fittings regulations. See related documents
above (ref BS 6700 and new BSEN 806 parts 1 - 5 plus BS
8558) For combination boilers the incoming water supply
should be checked to ensure that sufficient pressure and
flow rate are available to suite the intended use, see the
technical data at the back of this manual.
All mains water heated by the ecoTEC combination boiler
will be classed as Category 2 fluid and small expansion vol-
umes created during warm up must be allowed to flow back
3 capacity into the supply pipe. No back flow prevention is necessary
with this appliance as the very small expansion volume is
unlikely to heat the incoming service pipe above 25 Deg C.
Note that where back flow prevention devices are fitted
(this may include water meters) these can prevent the per-
mitted expansion into the cold supply. This along with the
effects of pumping and / or water hammer can result in a
pressure build-up that may cause damage to the boiler (and
other household devices such as showers). Vaillant cannot
accept responsibility for damage caused to the boiler or its
surroundings where an appliance has been fitted to sup-
plies with mechanical back flow prevention. In these cases
the requirement would be that a competent installer cor-
rectly installs a suitable shock arrestor / mini-expansion
vessel adjacent to the boiler in the cold water supply pipe.

2.5.8 Water circulation system

Detailed recommendations concerning the water circuit sys-
tem can be taken from BS 6798 and BS 5449, Part 1 (for
"Small Bore" and "Micro Bore" central heating installa-
tions). Lines which do not form part of the usable heating
surface should be insulated to prevent heat losses and pos-
sible freezing up, especially where the lines run under
rooves and ventilated cellar rooms. The drain connections
must be easily-accessible, so that the entire system includ-
ing the boiler and hot water system can be drained. The
drain connections should be at least 1/2 " (BSP nominal
size) and must be in accordance with BS 2879.
The boiler is suitable for Minibore and Microbore systems.
Water lines are to be copper pipes in accordance with
BS 2871, Part 1. These must be thoroughly cleaned, espe-
cially when connecting a new boiler to an existing system.
Safety 2
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