Flue Systems & Ventilation - Potterton iHE 100/300 Installation And Servicing Instructions

FLUE SYSTEM & VENTILATION
In order to minimise the height of this appliance, the
fl ue spigot plate assembly is supplied separately
and will have to be installed before fi tting the fl ue
system:
• Fully insert (approx 50mm) plastic fl ue pipe sec-
tion (supplied) into fl ue socket (fi g 3.1).
Fig 3.1
• Screw metal air colar onto the top of the fl ue
socket with the 8 screws (supplied) (fi g 3.2)
Fig 3.2
The appliance can be installed using a number of
alternative arrangements depending upon the instal-
lation requirements It is delivered with a 130/200mm
concentric outlet in the centre. Flue components are
ordered separately as required.
O F (T B
PEN LUE YPE
23
This is an open fl ued arrangement where the air for
combustion is drawn from the room and because
of this the room must be ventilated. If the Heater is
installed in a compartment then it will require both a
high level and a low level vent.
The fl ue products are discharged either horizontally
or vertically using any of the supplied separate duct
components.
iHE
)
V R
EQUIREMENTS FOR TYPE B
ENTILATION
)
SYSTEMS
Refer to BS 6644 clause 19 and BS 5440 part 2 for
detailed recommendations.
The room in which an appliance is installed must
have a permanent air vent to outside air or to a
room which itself has direct access to outside air.
Installations in boiler rooms require permanent
vents for air supply purposes, one at high level and
one at low level, direct to outside air. The minimum
free areas required are as follows:-
Low level (inlet)
High level (outlet)
Where the appliance is to installed in a compart-
ment, permanent air vents are required at high and
low level. These air vents must either connected
with a room or internal space, or be direct to out-
side air. The minimum free air requirements in the
compartment are as follows:-
Position of Air from room
Air Vents or internal
space
High Level iHE100 = 940 cm ²
iHE150 = 1,400 cm
Low Level iHE100 = 1,880 cm ² iHE100 = 940 cm
iHE150 = 2,800 cm
A compartment containing an open-fl ued appliance
shall be labelled as follows:
IMPORTANT: Do not block the vents. Do not use
the compartment for storage.
Where an installation is to operate in summer
months, the above allowance should be suffi cient,
provided it does not operate for more than 50%
of the time. If the installation is to be operated at
75% then an additional 1cm
kW at low and high level. If this appliance is to be
operated 100% of the time during the summer, an
additional 2cm free-area per kW will be required at
2
low and high level.
There must be suffi cient clearance around
the appliance to allow proper circulation of
ventilation air. The clearances required for
Installation and Servicing will normally be
adequate. (See Fig. 1.1)
The effect of any type of extract fan in the
plant room must be considered and an
additional air inlet may be needed from
outside to counter the effect of any such
fans.
12
(
OPEN FLUE
iHE 100 = 376 cm
2
iHE 150 = 560 cm
2
iHE 100 = 188 cm
2
iHE 150 = 280 cm 2
Air direct
from outside
iHE100 = 470 cm
2 iHE150 = 700 cm
iHE150 = 1,400 cm
2
will be required per
2
2
2
2
2