Worcester GB162-65 Installation And Servicing Instruction page 9

Installation of rated input greater than 70 kW
BS 6644 Specification for Installation of gas-fired
hot water boilers of rated inputs
between 70 kW (net) and 1.8 MW (net)
(2nd and 3rd family gases).
BS EN 15417 Gas-fired central heating boilers.
Specific requirements for condensing
boilers with a nominal heat input greater
than 70 kW but not exceeding 1000 kW.
BS EN 15420 Gas-fired central heating boilers. Type C
boilers of nominal heat input exceeding
70 kW, but not exceeding 1000 kW.
Irish Standards
The relevant Irish standards should be followed,
including:
• ECTI National rules for electrical installations
• IS 813:2002 for Domestic Gas Installations.
Health and & Safety Document No. 635.
Ventilation Requirements
BS5440:2 (up to a total boiler rating of 70 kW input).
BS6644 (Total boiler rating of 70 kW to 2000 kW
input).
The manufacturer's notes must not be taken, in any
way, as overriding statutory obligations.
The design and construction of the Worcester Wall hung
gas fired condensing boiler conforms to the basic
specifications listed in the European directive governing
gas-fired appliances 2009/142/EEC, and with respect to
EN 625, EN 483 and EN 677.
Observe the corresponding technical rules
and the building supervisory and statutory
regulations when installing and operating
the system.
WARNING: Keep the control unit housing
CLOSED when working on water-bearing
components.
• The boiler is designed exclusively for heating water as
part of a central heating system and/or hot-water
system.
• For optimum, long-term reliable functioning of the
boiler, and in order to be able to claim under the
terms of the manufacturer's warranty. The boiler must
be inspected and maintained at least once a year
(under normal operating conditions) by a Gas Safe /
ACS registered installation and service engineer.
• When instructions are not followed, warranty is
invalid.
6 720 648 726 (2011/07)
KEY TO SYMBOLS AND SAFETY INSTRUCTIONS
• Condensing boilers work more efficiently if the return
temperature is as low as possible.
LPG Installations
An appliance using L.P.G. must not be installed in a room
or internal space below ground level unless one side of
the building is open to the ground.
Timber framed building:
Where the boiler is to be fitted to a timber framed
building the guidelines laid down in BS5440: Part 1 and
IGE "Gas Installations in Timber Frame Buildings" should
be adhered to.
Bathroom Installations
This appliance is rated IP X4D.
The boiler may be installed in any room or internal
space, although particular attention is drawn to the
requirements of the current IEE (BS 7671) Wiring
Regulations. In Scotland, the electrical provisions of the
building regulations applicable in Scotland, with respect
to the installation of the boiler in a room or internal
space containing a bath or shower.
If the appliance is to be installed in a room containing a
bath or shower then, providing water jets are not going
to be used for cleaning purposes (as in communal baths/
showers), the appliance can be installed in Zone 3, as
detailed in BS 7671.
Compartment Installations
A compartment used to enclose the boiler should be
designed and constructed especially for this purpose. An
existing cupboard or compartment may be used,
provided that it is modified for the purpose.
In both cases, details of essential features of cupboard/
compartment design, including airing cupboard
installation, are to conform to the following: BS 6798
(No cupboard ventilation is required - see 'Air Supply' for
details).
It is not necessary to have a purpose-provided air vent in
the room or internal space in which the boiler is
installed. Neither is it necessary to ventilate a cupboard
or compartment in which the boiler is installed, due to
the low surface temperatures of the boiler casing during
operation; therefore the requirements of BS 6798,
Clause 12, and BS 5440:2 may be disregarded.
See for the required service clearances fig. 6 and fig. 7.
The position selected for installation MUST allow
adequate space for servicing in front of the boiler.
• in front: 550 mm
• below: 350 mm
• right side: 0 mm
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