Vaillant ecoTEC plus 937 Service Manual download pdf (Page 17)

Installation and maintenance instructions ecoTEC plus 937 0020031552_06 17

Location of the junction mm

A Directly under or above an opening or the horizontal

to an opening, a hollow ventilation tile, an opening

window etc.

300

B Under gutters, soil pipes or drainpipes 75

C Unter eaves 200

D Under balconies 200

E From vertical drainpipes and down-pipes 25

F From external and internal corners 300

G Above the ground, a roof or a balcony 300

H Opposite another surface 600

I Opposite another termination 1200

J Next to an opening (e.g. a door, window) within a

car-port

1200

K Vertically away from a junction on the same wall 1500

L Horizontally away from a junction on the same wall 300

M Distance away from an adjoining vertical flue pipe 500

Table 4.2 Position of the terminal in a fan-assisted concentric

flue

In addition, the terminal should not be located

closer than 150 mm from an opening in the fab-

ric of the building formed for the purpose of

accommodating a built-in element such as a

window.

BS 5440–1: We recommend that the terminal of a

fan-assisted flue system be positioned as follows:

a) At least 2 m from an opening in the building

directly opposite, and

b) so that products of combustion are not directed

to discharge across a boundary.

1) Dimensions B, C and D:

These dimensions can be reduced to 25 mm

without having a negative effect on the per-

formance of the boiler. In order to ensure that

condensate plume does not affect adjacent sur-

faces the terminal should be extended as shown

in Fig. 3.7.

2) Dimension F:

These dimensions can be reduced to 25 mm

without having a negative effect on the output

of the combi boiler. However in order to ensure

that the condensate plume doe not affect adja-

cent surfaces a clearance of 300mm is pre-

ferred. For IE, recommendations are given in

the current edition of IS813.

Fig. 4.7 Flue termination under balcony/eaves

4.6 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.

Ventilating a cabinet or enclosure

This appliance is highly efficient. As a consequence the

heat loss from the casing is very small. For cupboard or

compartment installations it is not necessary to provide

any high or low permanent air vents for cooling or ven-

tilation purposes.

4.7 Electrical connection

Danger!

Risk of death from electric shock.

If the appliance is not earthed, it may hold

voltage if a defect occurs.

Earth the appliance.

In accordance with BS 7671 (IEE Wiring Regulations) and

any other local regulations which may apply, a 3 A

fused single phase AC supply (230 V, 50 Hz) must be

provided. In IE the current issue of the ETCI regulations

must be observed. The method of connection to the

mains electricity supply must provide a means of

completely isolating the boiler and ancillary controls.

Isolation is preferably by the use of a fused three pin

plug and unswitched shuttered socket outlet, both com-

plying with the requirements of BS 1363. Alternatively, a

3 A fused double pole switch with 3 mm contact separa-

tion on both poles may be used.

General requirements 4

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