Specifications

Boiler installation sequence
28 Instructions for installation and servicing ecoTEC 839592_13
4
b
Caution!
Risk of damage to isolation valves caused
by heat transfer!
If the final connections are soldered, the heat
transferred during the process may damage
the isolation valves.
> Do not solder fittings to the pipes whilst
connected to the isolation valves.
> Cool and clean the pipes before fitting
them into the valves.
> Ensure all subsequent soldering operations
are carried out at least 450mm away from
the valves.
i
Flush all foreign matter from the mains sup-
ply before connecting to the boiler.
> Insert the seal (1) and connect the service valve (2) to
the appliance cold water connection.
> Fit the union nut (4) and the compression olive (3) to
the pre-formed tail provided with ecoTEC plus appli-
ances (5). The diameter of the pipe is 15 mm.
> Fully insert the pre-formed tail into the service valve.
Tighten the union nuts.
> Insert the seal (7) and connect in the pipe (6) to the
appliance hot water connection. The diameter of the
pipe is 15 mm.
> Mount the handle for the filling loop with a counter-
sunk screw to the service valve (2).
4.11 Condensate drain pipe
The ecoTEC plus appliances are fitted with a siphonic
tr
ap (The filling height is 145 mm). The siphon collects
the accumulated condensate in a container of approx.
200 ml capacity and directs the entire content into the
drain pipe. The risk of the condensate drain pipe
freezing is thus minimised.
The ecoTEC pro appliances are equipped with a normal
condensing water trap where the condensate is
constantly emptied into the drain pipe.
> C
onnect the boiler condensate drain (1) to a conden-
sate discharge pipe (2) which should be minimum of
19 mm internal diameter (22 mm external diameter for
any pipework installed external to the property) and
be made of an acid resistant material
(e.g. plastic overflow pipe).
i
If a boiler does not include a siphon then any
external condensate drainage pipe shall be
increased to a minimum diameter of 32 mm
nominal diameter to reduce the risk of freez-
ing. In exposed locations, the condensate
drainage pipework shall be protected with
waterproof pipe insulation. Additionally when
a boiler is installed in an unheated location
such as a garage all condensate drainage
pipes should be considered as external.
i
The discharge pipe from the boiler conden-
sate drain must have a continuous fall (45 mm
per meter) and preferably be installed and
terminated within the building to prevent pos-
sible freezing.
7
d
Soakaway
c
6
5
Gulley
a
Internal
stackpipe
3
4
3
b
Internal
discharge system
1
2
Fig. 4.8 Installing the condensate drain pipe (picture shows
ecoTEC plus combination boiler)
The condensate discharge pipe must terminate in a suit-
able position, e.g.:
a) preferably the discharge pipe should run and
terminate internally to the house soil and vent stack
(at least 450 mm above the invert of the stack). A trap
giving a water seal of at least 75 mm (3) (built into the
boiler) should be incorporated into the pipe run, and
there must be an air break (4) in the discharge pipe
upstream of the trap. The connection to the stack
should not be made in a way that could cause cross
flow into any other branch pipe, or from that branch
pipe into the condensate drainpipe. This can be
achieved by maintaining an offset between branch
pipes of at least 110 mm on a 100 mm diameter stack
and 250 mm on a 150 mm diameter stack.
b)connecting into the internal discharge branch
(e.g. sink waste or washing machine) with an external
termination, the condensate discharge pipe should
have a minimum diameter of 22 mm with no length
restriction and should incorporate a trap with a 75 mm
(3) (built into the boiler) seal. The connection should
preferably be made down stream of the sink waste