The fitting of a "Trace Heating" Element is NOT a substitute for correct
installation of the condensate drain. ALL requirements in this section must
still be adhered to.
5.3.5 Clearances
A flat vertical area is required for the installation of the boiler and it should
be capable of bearing the weight of the boiler when full of water.
These dimensions include the necessary clearances around the boiler for
case removal, spanner access and air movement. Additional clearances
may be required for the passage of pipes around local obstructions such
as joists running parallel to the front face of the boiler.
In the diagram these are MINIMUM recommended dimensions. Greater
clearance will aid installation and maintenance.
5.3.6 Flue/chimney location
The following guidelines indicate the general requirements for siting
balanced flue terminals. For GB recommendations are given in BS
5440
Pt 1. For IE recommendations are given in the current edition of I.S. 813
Domestic Gas Installations.
Important
Due to the nature of the boiler a plume of water vapour will be
discharged from the flue. This should be taken into account when
siting the flue terminal.
Fig.16 Flue outlets
R
T
U
J,K
J,K
A
D
E
C
I
I
I
A
A
S
F
H
H
B
G
F
I
I
L
N
M
PN-0000456
1
1
Flue positions marked require a flue terminal guard.
Tab.18 Terminal position with minimum distance
Key Description mm Key Description mm
A
(1)
Directly below an opening, air brick open
ing window etc.
300 J From a surface or boundary line facing
a terminal
600
B
(1)
Above an opening, air brick, opening win
dow etc.
300 K From a terminal facing a terminal
(Horizontal flue)
1200
From a terminal facing a terminal (Ver
tical flue)
600
C
(1)
Horizontally to an opening, air brick,
opening window etc.
300 L From an opening in carport (e.g. door,
window) into the dwelling
1200
5 Before installation
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