Supplied By www.heating spares.co Tel. 0161 620 6677
6
221481C
1 General Data
1.2 Range Rating
The boiler is range rated and may be adjusted to suit individual
system requirements.
The respective Table 2 gives the ratings and settings.
1.3 B.S.I. Certification
The boiler is certificated to the current issue of British Standard
6332 Part 1, invoking the current issue of BS5258 Part 1 for
performance and safety. It is, therefore, important that no
alteration is made to the boiler without permission, in writing,
from Hepworth Heating Ltd.
Any alteration that is not approved by Hepworth Heating Ltd.,
could invalidate the B.S.I. Certification, the warranty and could
also infringe the current issue of the Statutory Requirements.
1.4 Gas Supply
The gas installation shall be in accordance with the current
issue of BS6891.
The supply from the governed meter must be of adequate size
to provide a steady inlet working pressure of 20mbar (8in wg) at
the boiler.
On completion test the gas installation for soundness using the
pressure drop method and a suitable leak detection fluid, purge
in accordance with the above standard.
1.5 Electrical Supply
WARNING. This boiler must be earthed.
All system components shall be of an approved type and shall
be connected in accordance with the current issue of BS7671
and any applicable local regulations.
Connection of the boiler and system controls to the mains
supply must be through a common isolator and must be fused
3A, maximum. This method of connection should be, preferably,
an unswitched shuttered socket outlet and 3 pin plug both to the
current issue of BS1363.
Alternatively, a double pole isolating switch may be used,
provided it has a minimum contact separation of 3mm in both
poles. The isolator should be clearly marked, showing its
purpose. See also Section 1.11.
Wiring to the boiler must be insulated PVC flexible type to the
current issue of BS6500 Table 16 not less than 0.75mm
2
(24/
0.20mm).
1.6 Contents of Packaging
The boiler is delivered in one pack.
The other pack contains the balanced flue terminal assembly
and accessories.
Refer to Section 2 to check that the flue terminal assembly
supplied is suitable.
kW
Btu/h
kW
Btu/h
m bar
in. w.g.
-
7.33
10.99
-
25,000
37,500
7.33
5.86
8.79
25,000
20,000
30,000
7.2
4.7
10.5
2.9
1.9
4.2
Max.
Min.
Med.
TABLE 2.
1.7 Water System
The boiler may be fitted to an open vented or sealed system, see
Section 3 for further details.
1.8 Draining Tap
A draining tap must be provided at the lowest points of the
system which will allow the entire system, boiler and hot water
cylinder to be drained off.
The boiler is provided with a drain tap for heat exchanger
draining.
Draining taps shall be to the current issue of BS2879.
1.9 Safety Valve
A safety valve need not be fitted to an open vented system.
1.10 Location
This boiler is not suitable for outdoor location.
The boiler may be installed in any room, although particular
attention is drawn to the requirements of the current issue of
BS7671 with respect to the installation of a boiler in a room
containing a bath or shower. Any electrical switch utilising
mains electricity should be so situated that it cannot be touched
by a person using the bath or shower. The electrical provisions
of the Building Standards (Scotland) Regulations are applicable
to such installations in Scotland.
The boiler must be mounted on a flat wall which is sufficiently
robust to take its weight.
1.11 Boiler Location
Refer to diagram 1, Instructions for Use.
The boiler must be positioned so that at least the minimum
operational and servicing clearances are provided.
Additional clearances may be required for installation.
If fixtures are positioned next to the boiler they should be made
removable for access to pipework.
1.12 Heating System Controls
The heating system should have installed: a programmer and
room thermostat controlling the boiler.
Thermostatic radiator valves may be installed in addition to the
room thermostat.
Note: For further information, see The Building Regulations
1991 - Conservation of fuel and power, 1995 edition - Appendix
G, table 4b.
NOMINAL
HEAT INPUT
(GROSS)
NOMINAL
HEAT
OUTPUT
BURNER
SETTING
PRESSURE
RANGE RATING