Vaillant ecoTEC plus 618 Specifications download pdf (Page 20)

20 Instructions for installation and servicing ecoTEC

Fig. 4.7 Installing the hot and cold water connection (ecoTEC

pro combination boiler)

Note

Flush all foreign matter from the mains supply

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).

4.10 Condensate drain pipe

Soakaway

Gulley

Internal

stackpipe

Internal

discharge system

Fig. 4.8 Installing the condensate drain pipe (picture shows

ecoTEC plus combination boiler)

The ecoTEC plus appliances are fitted with a siphonic

trap (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 freez-

ing is thus minimised.

The ecoTEC pro appliances are equipped with a normal

condensing water trap where the condensate is con-

stantly emptied into the drain pipe.

• Connect 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 over-

flow pipe).

Note

The discharge pipe from the boiler condensate

drain must have a continuous fall (45 mm per

meter) and preferably be installed and terminat-

ed within the building to prevent possible freez-

ing.

The condensate discharge pipe must terminate in a suit-

able position, e.g.:

a) preferably the discharge pipe should run and termi-

nate 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.

4 Boiler installation sequence

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 55 56

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Vaillant ecoTEC plus 618 Specifications Page 20

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