15
ecoTEC plus 937 installation and maintenance manual
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 3.2 Position of the terminal in a fan-assisted concentric
flue
h
Note!
In addition, the terminal should not be located
closer than 150 mm from an opening in the
fabric 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 performance of the
boiler. In order to ensure that condensate plume does
not affect adjacent surfaces 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 adjacent surfaces a
clearance of 300mm is preferred. For IE,
recommendations are given in the current edition of
IS813.
Fig. 3.7 Flue termination under balcony/eaves
3.8 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
ventilation purposes.
3.9 Electrical
connection
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
complying with the requirements of BS 1363.
Alternatively, a 3 A fused double pole switch with 3 mm
contact separation on both poles may be used.
e
Danger!
Danger of death by electric shock!
The unit must be earthed.
General requirements 3
