13
Installation and Servicing
SECTION 1 - GENERAL
1.10 TERMINAL
The terminal assembly can be adapted to accommodate various wall
thicknesses. Refer to Section 2.9 .
1.11 AIR SUPPLY
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.
1.12 WATER CIRCULATION SYSTEM
IMPORTANT.
A minimum length of 1 metre of copper pipe MUST be tted to both ow and
return connections from the boiler before connection to any plastic piping.
The central heating system should be in accordance with BS.6798
and, in addition, for smallbore and microbore systems, BS.5449.
WATER TREATMENT - see Section 1.19.
1.13 BOILER CONTROL INTERLOCKS
Central heating systems controls should be installed to ensure
the boiler is switched off when there is no demand for heating, in
compliance with Building Regulations.
Heating systems utilising full thermostatic radiator valve control of
temperature in individual rooms should also be tted with a room
thermostat controlling the temperature in a space served by radiators
not tted with such a valve.
When thermostatic radiator valves are used, the space heating
temperature control over a living / dining area or hallway having
a heating requirement of at least 10% of the minimum boiler heat
output should be achieved using a room thermostat, whilst other
rooms are individually controlled by thermostatic radiator valves.
However, if the system employs thermostatic radiator valves on all
radiators, or two port valves, then a bypass circuit must be tted with
an automatic bypass valve to ensure a ow of water should all valves
be in the closed position.
1.14 ELECTRICAL SUPPLY
WARNING.
This appliance must be earthed.
Wiring external to the appliance MUST be in accordance with
the current I.E.E. (BS.7671) Wiring Regulations and any local
regulations which apply. For IE reference should be made to the
current ETCI rules for electrical installations.
The mains supply to the boiler and system wiring centre shall be
through one common fused double pole isolator. For new heating
systems, and where practicable replacement boiler installations, the
isolator shall be situated adjacent to the appliance.
1.15 CONDENSATE DRAIN
Refer to Sections 2.15, & 3.5
A condensate drain is provided on the boiler. This drain must be
connected to a drainage point on site. All pipework and ttings in the
condensate drainage system MUST be made of plastic - no other
materials may be used.
IMPORTANT.
Any external runs must be in accordance with BS 6798.
The drain outlet on the boiler is sized for standard 21.5mm (3/4”)
overow pipe. It is a universal tting to allow use of different brands
of pipework.
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