Vaillant ecoTEC plus SERIES, Instructions For Installation And Servicing

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Installation and Servicing ecoTEC plus
21
COUPLING
Fig. 4.5 Gas and condense connections
22mm compression is the
recommended fixing
for servicing.
Fig. 4.6 Water connections
4.4 Electrical connections
Danger!
This appliance must be earthed.
Electrocution caused by touching live parts
can be fatal. Before working on the appliance,
turn off the power supply and secure against
restart.
The boiler must be earthed.
All system components shall be of an approved type
and all wiring to current I.E.E. wiring regulations.
External wiring must be correctly earthed, polarised
and in accordance with the relevant standards.
In GB this is BS 7671.
In IE this is the current edition of I.S.813 “Domestic
Gas Installations”.
The boiler must be connected to a permanent 230V
ac, 50Hz supply.
Connection of the whole electrical system of the boiler,
including any heating controls, to the electrical supply
must be through one common isolator and must be
fused 3 Amp maximum.
Isolation should be by a double pole switched fused
spur box, with a minimum gap of 3mm for both poles.
The fused spur box should be readily accessible and
preferably adjacent to the appliance. It should be
identified as to its use.
Alternatively connection can be made through an
unswitched shuttered socket and 3A fused 3-pin plug
both to the current issue of BS 1363 may be used,
provided they are not used in a room containing a bath
or shower.
A 3 core flexible cord according to BS6500 tables 6, 8
or 16 (3 x 0.75 to 3 x 1.5mm
2
) should be used.
Caution!
This appliance must be wired in accordance
with these instructions. Any fault arising from
incorrect wiring cannot be put right under the
terms of the Vaillant guarantee.
Danger!
Mains connection terminals L and N remain
live “unless isolated at the fused spur or
electrical outlet supplying the boiler”.
Caution!
Do not connect any mains 230V power to the
connections 7-8-9 or BUS (+,-).
Note!
Ensure that all cables pass through grommets
in the outer casing and are securely fixed by
the cable clamps in the rear of the electronics
box. Ensure that the power supply is connected
such that the current carrying conductors
become taut before the earth conductor should
the supply cable slip from the cable clamp
Boiler installation sequence 4