4
221899A
Installation - 1 General
Important Notice
This boiler is for use on natural gas (G20) as distributed in the
United Kingdom and Ireland and cannot be used on any other
gas.
This boiler can be used on open vented or sealed water systems.
Domestic hot water must be provided by pumped circulation.
Wherever possible, all materials, appliances and components
used shall comply with the requirements of applicable British
Standards.
Where no British Standards exists, materials and equipment
should be fit for their purpose and of suitable quality and
workmanship.
Sheet Metal Parts
WARNING. When installing or servicing this boiler care should
be taken when handling sheet metal parts, to avoid any possibility
of personal injury.
1.1 Statutory Requirements
The installation of the boiler must be carried out by a CORGI
registered installer in accordance with the relevant requirements
of the current issue of:
The manufacturer’s instructions supplied.
The Gas Safety (Installation and Use) Regulations, The Building
Regulations, The Building Standards (Scotland) Regulations
(applicable in Scotland), Local Water Company Bye-laws,
The Health and Safety at Work Act, Control of Substances
Hazardous to Health (COSHH), The Electricity at Work
Regulations and any local regulations which may apply.
Detailed recommendations are contained in the current issue of
the following British Standards and Codes of Practice:
BS4814, BS6798, BS5440 Part 1 and 2, BS5546 Part 1, BS5449,
BS6891, BS6700, BS7074 Part 1 and 2, BS7593, BS7671.
Manufacturer’s instructions must not be taken as overriding
statutory requirements.
1.2 Data
See Table 1 and diagrams 1.1 and 1.2.
All dimensions are given in millimetres (except as noted).
The Seasonal Efficiency Domestic Boilers UK (SEDBUK) is
77.3%.
The value is used in the UK Government’s Standard Assessment
Procedure (SAP) for energy rating of dwellings. The test data
from which it has been calculated have been certified by B.S.I.
1.3 Range Rating
This boiler is range rated and may be adjusted to suit individual
system requirements, refer to diagram 1.2 for data label position,
ratings and settings.
1.4 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.
An optional programmer for fitting on the boiler is availble, kit no.
458065.
1.5 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, purge in accordance with the above
standard.
1.6 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.
All external wiring between the appliance and the electrical
supply and earthing requirements shall comply with the current
IEE 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 must be by a fused
double pole isolating switch, with a minimum contact separation
of 3mm on both poles. The switch should be readily accessible
and preferably adjacent to the appliance. It should supply the
appliance only and be easily identifiable as so doing.
Diagram 1.1
All dimensions are given in millimetres
A
B
C
D
E
M
F
G
PUMPED
RETURN
PUMPED
FLOW
C
WATER CONNECTIONS
22mm COPPER PIPE
GAS CONNECTION
RC
1
/
2
(
1
/
2
in. BSPT)
6784
L
H
J
K
P
N
Q
TOP / SIDE
FLUE OPTION
REAR
FLUE OPTION
R
MODEL
A
B
C
D
E
F
G H J
K L M N P Q R
40FF
262 75 102 360 139 500 68 85 115 115 126 156 100 104 4 40 68 108
STD/EXD. EASYFIT STD/EXD. EASYFIT
