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6
221504A
RANGE RATING
NOMINAL
Btu/h
HEAT
INPUT(GROSS)
kW
NOMINAL
Btu/h
HEAT
OUTPUT
kW
BURNER
m bar
SETTING
PRESSURE
in.w.g
APPROX
m
3
h
GAS
RATE
ft
3
h
min medium max
1.8 1.9 2.1
63.0 68.5 74.0
50,000 55,000 60,000
14.65 16.12 17.58
63,290 68,750 74,070
18.55 20.15 21.71
TABLE 2.
MODEL 60F
9.4 11.2 13.0
3.8 4.5 5.2
Detailed recommendations are contained in the current issue of
the following British Standards and Codes of Practice, BS4814,
BS5440 Part 1 and 2, BS5449, BS5546, BS6700, BS6798,
BS6891, BS7074 Part 1 and 2. BS7478, BS7593, BS7671.
Manufacturer’s notes must not be taken as overriding statutory
requirements.
1.4 B.S.I. Certification
The boiler is certificated to the current issue of BS6332 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 of the boiler, the warranty
and could also infringe the current issue of the Statutory
Requirements.
1.5 General Data
The data label is positioned on the inner case visible when the
front panel is removed.
The serial number plate is positioned on the control box cover,
visible when the controls tray is removed.
The General Arrangement diagram 1.1 and all other dimensions
are given in millimetres.
General Data refer Table 1
1.6 Range Rating
The boiler is range rated and is factory set to maximum, it may
be adjusted to suit individual system requirements, refer to
Table 2.
1.7 Gas Supply
The gas installation must 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 leak detection fluid, purge in
accordance with the current issue of BS6891.
1.8 Electrical Supply
WARNING. This boiler must be earthed.
All system components shall be of the approved type and wiring
shall comply with and be connected in accordance with the
requirements of 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,
by a fused double pole isolating switch, provided it has a
minimum contact separation of 3mm on both poles. This should
be readily accessible and preferably adjacent to the appliance.
It should supply the appliance only and be easily identifiable as
so doing.
Alternatively an unswitched shuttered socket outlet and 3A
fused 3 pin plug both to the current issue of BS1363 may be
used provided that they are not used in a room containing a bath
or shower.
Wiring to the boiler must be PVC insulated type to the current
issue of BS6500 Table 16, not less than 0.75mm
2
(24/0.20mm).
1.9 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.
1 General
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