Supplied By www.heating spares.co Tel. 0161 620 6677
9
A
VAILABLE PUMP HEAD
7
6
5
4
3
2
1
Flow Rate ltr/min
A
vailable Head Metres
2m HEAD
Bth/hr.
kW
Flow rate
∆
t°C
85,000
25.0
17.9 l/m
20.0
75,000
22.0
17.9 l/m
17.6
65,000
19.0
17.9 l/m
15.3
50,000
14.7
17.9 l/m
11.8
7
3.3
FLUE TERMINAL POSITION
Detailed r
ecommendations for flue installation are given in BS
5440:1. The following notes are for general guidance.
a)
The boiler MUST be installed so that the ter
minal is
exposed to the external air.
b)
It is impor
tant that the position of the terminal allows free
passage of air across it at all times.
c)
It is ESSENTIAL TO ENSURE that pr
oducts of combustion
discharging from the terminal cannot re-enter the building,
or any other adjacent building, through ventilators,
windows, doors, other sources of natural air infiltration, or
forced ventilation/air conditioning.
d)
The minimum acceptable dimensions fr
om the terminal to
obstructions and ventilation openings are specified in Fig.8.
e)
If the ter
minal discharges into a pathway or passageway
check that combustion products will not cause nuisance and
that the terminal will not obstruct the passageway.
f)
Wher
e the lowest part of terminal is fitted less than 2000 mm
(78 ins) above the ground, above a balcony or above a
flat roof to which people have access, the terminal MUST
be protected by a purpose designed terminal guard
(optional extra; Part No.951505).
g)
The air inlet / flue outlet duct MUST NOT be closer than
25mm (1in) to combustible material.
h)
In cer
tain weather conditions the terminal may emit a
plume of steam. This is normal but positions where this
would cause a nuisance should be avoided.
Detailed recommendations for air supply are given in BS 5440:2.
The following notes are for general guidance.
a)
It is not necessar
y to have a purpose provided air vent in the
room or internal space in which the appliance is installed.
b)
If the boiler is to be installed in a wall cupboar
d permanent
air vents are required for cooling purposes in the cupboard at
both high and low levels. Both air vents must communicate
with either the same internal room / space or be on the same
wall to external air. Each air vent communicating with another
room or internal space must have a minimum effective area
of: 362 cm
2
(56 in
2
)
If the ventilation is direct to air from outside the building, the
necessary areas quoted above may be halved.
If the cupboar
d or compartment height is 2000 mm
min then NO purpose made ventilation is required.
GAS SUPPLY
a)
T
he 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 ser
vice 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 pipework should be of suf
ficient
size to carry the maximum boiler input plus the demand
of any other installed appliance. (BS 6891: 1988).
A minimum of 22 mm dia. pipework is r
equired to
within 1 metre of the appliance gas cock.
e) Natural gas appliances:
The gover
nor at the meter
must give a constant outlet pressure of 20 mbar (8 in.wg)
when all appliances on the system are running.
Pr
opane appliances:
The r
egulator 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 pur
ged. 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 soundness
.
3.6
CENTRAL HEATING SYSTEMS
a)
This appliance is designed for connection to sealed central
heating water systems. Refer to Fig. 11 for a typical system
design.
b)
A sealed system must only be filled by a competent person.
c)
The available pump head is given in Fig. 9.
d)
A minimum heating flow rate cor
responding to a heating
differential of 15°C must be obtained at all times.
e)
An automatic heating bypass is fitted within the appliance.
However if thermostatic radiator valves are fitted, a radiator
must be fitted with two lockshield valves.
f)
The following paragraphs outline the specifications of the
items fitted to the boiler.
PUMP
The available head shown in Fig. 9 is that in excess of the
appliance hydraulic resistance, i.e. that available for the system.
3.4
3.5
VENTILATION REQUIREMENTS
0
2
4
6
8
10
12
14
16 18
20
22
