Water Connections; Condensate Trap And Siphonic Drain Connection; Installing The Flue System; Electrical Connections - Vaillant ecoTEC plus Instructions For Installation And Servicing

union
cennector
gas supply in
3
internal
stack pipe
4
gulley 6
5
Fig. 4.5 Gas and condense connections

4.3.4 Water connections

a Caution!
When making final connection to the boiler, if
using soldered fittings, extra care should be
taken to avoid damage through heat transfer.
Return
Fig. 4.6 Water connections
Provision is made for the water connections to be made
from above the boiler, see fig 4.6 (using the two 22mm
compression couplers supplied). The position is shown
on the wall template. Flush out the domestic hot water
and the heating systems before connecting to the boiler.

4.3.5 Condensate trap and siphonic drain connection

Refer to fig 4.5. The condensate drain connection is at the un-
derside rear of the boiler. The condense drain is suitable for use
with standard "Push fit" overflow pipe and couplings do not use
adhesive when connecting to the spigot (1) The condense drain
pipe (2) should be non corrosive plastic. The drain pipe should
have a continuous fall of a least (45mm per metre) away from
the boiler. Condensate should, if possible be discharged into the
household internal drainage system. The condensate is discharged
periodically in 'slugs' by siphonic action. It is not necessary to
provide air breaks or extra traps in the discharge pipe as there is
Instructions for installation and servicing ecoTEC plus / 0020020828_05
condensate
trap
spigot
1 coupling
condensate
2
drain pipe
a
b 3
internal
discharge
system
c
d soakaway
22 mm compression
is the recommended
fixing for servicing.
Flow
Boiler installation sequence 4
already a 75mm high trap inside the boiler. Fitting an extra trap
may cause the boiler siphon to work incorrectly. Refer to
BS5546 or BS6798 for advice on disposal of boiler condensate.
(a) Preferably the drain pipe should run and terminate inter-
nally to the house soil and vent stack at least 450mm
above the invert of the stack. There must be an air break
in the discharge pipe upstream of the trap. This should be
designed so that the condensate cannot be discharged into
the house if the condensate drain pipe becomes blocked.
(b) Connecting into the internal discharge branch
(e.g. sink waste or washing machine) with an external
termination, the condensate drain pipe should have a
minimum diameter of 22mm with no length restriction
and should incorporate a trap with a 75mm (3) seal.
The connection should preferably made down stream
of the sink waste trap, if the connection is only possible
up stream, then an air break is needed between the
two traps. This is normally provided by the sink waste.
(c) Termination in a gully (5) below grid level (6) and
above the water level. The external pipe length
should be kept as short as possible to minimise the risk
of freezing and should not be more than 3 metres.
(d) At a condensate absorption point (soak away) (7). The
external pipe length should not be more than 3 metres.
Refer to the latest issue of BS 6798 Specification for
installation of gas fired boilers of rate input not exceed-
ing 70kW net for further information. Before operating
the boiler the condensate trap must be filled with water.

4.3.6 Installing the flue system

• Install the flue system (refer to the separate air/flue
duct installation instructions).
4.4

Electrical connections

e 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,
inclu-ding 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 3 mm for both poles.
The fused spur box should be readily accessible and
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