Potterton Kingfisher Mf CFL40 - 100, Installation & Service Instructions Manual

Page: 9 / 40

Publication No. 5102977
9 Installation Requirements
Balanced Flue Models
1.4 Air Supply
The air requirements must meet BS 5440 Part 2.
The room in which the boiler is installed does not require a
purpose provided air vent.
If the boiler is installed in a compartment, permanent air
vents are required in the compartment, one at high level
and one at low level, either direct to the outside air or to a
room. Both high level and low level air vents must
communicate with the same room or must be on the same
wall to outside air. Both the high level and low level vent
must each have a combined free area in accordance with
Table 3.
If the boiler is installed in a compartment with a door, allow
at least 25mm clearance between the front of the boiler and
the door for air movement.
1.5 Flue Systems & Terminal Location
Horizontal - Concentric (Left, Right or Rear).
The flue/terminal assembly supplied is suitable for a
wall thickness of between 150mm and 400mm.
A flue/terminal assembly suitable for a wall thickness of
up to 600mm is also available.
Both the flue/terminal assemblies are telescopic and
the minimum lengths (150 mm/6 in) are achieved by
cutting.
A 1m flue extension is available. Under no circumstances
should the total flue length exceed:-
3.4m 40 to 70 models
2.4m 80 model
1.4m 90 model
1.0m 100 model
Vertical - Concentric.
3.4m 40 - 70 models Only
Where bends may be being used, the total flue length will
be reduced, see Pages 17 & 18 for more details.
See separate Installation Instructions supplied with the
flue.
Fig. 5
Table 3
Compartment Ventilation
Free Area cm sq. High Level Low Level
RSL40 132 132
RSL50 165 165
RSL60 198 198
RSL70 231 231
RSL80 264 264
RSL90 297 297
RSL100 331 331
Note: If ventilating directly to outside, the figures shown in
Table 3 can be halved.