Supplied By www.heating spares.co Tel. 0161 620 6677
5
FLUE TERMINAL POSITION
SPECIAL REQUIREMENTS FOR A
VERTICALLY BALANCED FLUE
Position
Minimum spacing
A
Directly below an openable window,
300mm
12in
air vent, or any other ventilation
opening
B
Below gutter, drain/soil pipe
75mm
3in
C
Below eaves
200mm
8in
D
Below a balcony
200mm
8in
*2500mm
98in
E
From vertical drain pipes and 150mm
6in
soil pipes
F
From internal or external corners
300mm
12in
*internal corners
*1000mm
40in
G
Above adjacent ground or
balcony level
300mm
12in
H
From a surface facing the terminal
600mm
24in
*2500mm
98in
I
Facing terminals
1200mm
48in
*2500mm
98in
J
From opening (door/window) in
1200mm
48in
carport into dwelling
*not recommended
K
Vertically from a terminal on the
1500mm
60in
same wall
L
Horizontally from a terminal on the
300mm
12in
same wall
M
Adjacent to opening
300mm
12in
N
Below carport
600mm
24in
*not recommended
O
From adjacent wall
300mm
12in
P
From adjacent opening window
1000mm
40in
Q
From another terminal
600mm
24in
R
Minimum height
300mm
12in
*Recommended by the boiler manufacturing industry to prevent pluming
nuisance and damage to buildings.
d)
If the appliance is installed in a room or internal space with other
opened flued appliances, then the size of the air vent necessary
should be calculated in accordance with BS 5440-2 Table 2.
e)
Where an open flued system is used, and the flue duct air inlet is
within a compartment then high and low level air vents are
necessary in the compartment, the size of the vents should be
calculated in accordance with BS 5440-2 Table 2.
CONDENSATE DISPOSAL
3.5
The condensate drain connection is suitable for either 21.5 mm or 22
mm plastic push fit or adhesive overflow pipes and fittings. It should
be piped to drain, preferably within the building, maintaining a
continuous 2.5° fall away from the appliance. If the drain is routed to
outside it should be to a drain or soak away, and any external pipe
work should be in 32 mm. Insulation to protect from freezing in cold
weather conditions is also advisable. Note if the appliance is installed
in a garage all pipe work should be in 32 mm. Ensure that the
condensate discharge system complies with any local regulations in
force.
GAS SUPPLY
3.6
a)
The Gas Supplier should be consulted at the installation planning
stage in order to establish the availability of an adequate supply
of gas.
b)
An existing service pipe MUST NOT be used without prior
consultation with the Gas Supplier.
c)
A gas meter can only be connected by the Gas Supplier or by
their contractor.
d)
An existing meter and/or pipe work should be of sufficient size
to carry the maximum appliance input plus the demand of any
other installed appliance. (BS 6891: 1988).
A minimum of 22 mm diameter pipe work is recommended within
1000 mm of the appliance gas cock.
e) Natural gas appliances:
The governor at the meter must give a
constant outlet pressure of 20 mbar (8 in.wg) when all appliances
on the system are running.
Propane appliances:
The regulator must give a constant outlet
pressure of 37 mbar (14.9 in.wg) when all appliances on the
system are running.
f)
The gas supply line should be purged. WARNING: Before purging
open all doors and windows, also extinguish any cigarettes,
pipes, and any other naked lights.
g)
The complete installation must be tested for gas tightness.
CENTRAL HEATING SYSTEM
3.7
a)
The appliances incorporate all the components necessary to
allow them to be connected to a sealed central heating system.
Refer to Figure 7a for a typical system design, which
incorporates radiators, and a drain facility that must be provided
at the lowest point in the system to allow complete drain down.
b)
The installation should be designed to operate with a flow
temperature of up to 95 °C.
c)
A sealed system must only be filled by a competent person.
d)
The available pump head for the appliances are given in
Figure 6.
e)
If thermostatic radiator valves are fitted, a radiator must be fitted
with two lock shield valves, to enable correct operation of the
pump-overrun facility.
13
751030 MANUAL (NEW) 21/9/10 08:42 Page 29
