Gas Supply; Flue Installation; Air Supply - IDEAL icos system HE15 Installation And Servicing

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GAS SUPPLY

The local gas supplier should be consulted, at the installation
planning stage, in order to establish the availability of an
adequate supply of gas. An existing service pipe must NOT be
used without prior consultation with the local gas supplier.
The boiler MUST be installed on a gas supply with a governed
meter only.
A gas meter can only be connected by the local gas supplier or
by a Gas Safe Registered Engineer. In IE by a Registered Gas
Installer (RGII).
An existing meter should be checked, preferably by the gas
supplier, to ensure that the meter is adequate to deal with the
rate of gas supply required.
It is the responsibility of the Gas Installer to size the gas
installation pipework in accordance with BS6891:2005. Whilst
the principle of the 1:1 gas valve ensures the icos system
range is able to deliver it's full output at inlet pressures as low
as 14mb, other gas appliances in the property may not be as
tolerant. When operating pressures are found to be below the
minimum meter outlet of 19mb these should be checked to
ensure this is adequate for correct and safe operation.
Allowing for the acceptable pressure loss of 1mb across the
installation pipework, it can be assumed that a minimum
permitted operating pressure of 18mb will be delivered to the
inlet of the appliance. (Reference BS 6400-1 Clause 6.2
Pressure Absorption).
The integral appliance isolation valve and boiler pipework
could further reduce the operating pressure by up to 1.5mb
when measured at the inlet test point on the appliance gas
valve. Therefore it has been identified that an operating
pressure as low as 16.5mbar could be measured at the
appliance inlet pressure test point on the gas valve.
IMPORTANT.
Installation pipes MUST be fitted in accordance with BS.6891.
In IE refer to I.S.813:2002. Pipework from the meter to the
boiler MUST be of an adequate size.
The complete installation MUST be tested for gas tightness and
purged as described in the above code.

FLUE INSTALLATION

Pluming will occur at the terminal, so where possible, terminal
positions where this could cause a nuisance should be
avoided.
The flue must be installed in accordance with the
recommendations of BS.5440-1:2000. In IE refer to
I.S.813:2002.
The following notes are intended for general guidance:
1. The boiler MUST be installed so that the terminal is
exposed to external air.
2. It is important that the position of the terminal allows the
free passage of air across it at all times.
3. Minimum acceptable spacing from the terminal to
obstructions and ventilation openings are specified in
Table 3.
4. Where the lowest part of the terminal is fitted less than 2m
(6'6") above a balcony, above ground or above a flat roof to
which people have access then the terminal MUST be
protected by a purpose designed guard.
Terminal guards are available from boiler suppliers.
(ask for TFC flue guard model no. K6 - round, plastic
coated). In case of difficulty contact:
Grasslin (UK) Ltd., Tower House, Vale Rise, Tonbridge,
Kent TN9 1TB
Tel: +44 (0) 1732 359 888. Fax: +44 (0) 1732 354 445
www.tfc-group.co.uk
Ensure that the guard is fitted centrally.
icos system -
Installation and Servicing
GENERAL
Table 3 - Balanced Flue Terminal Position
Flue Terminal Positions
1. Directly below, above or alongside an opening
window, air vent or other ventilation opening.
2. Below guttering, drain pipes or soil pipes.
3. Below eaves.
4. Below balconies or a car port roof.
5. From vertical drain pipes or soil pipes.
6. From an internal or external corner or to a
boundary along side the terminal.
7. Above adjacent ground, roof or balcony level.
8. From a surface or a boundary facing the terminal.
9. From a terminal facing a terminal.
10. From an opening in a car port
(e.g. door or window) into dwelling.
11. Vertically from a terminal on the same wall.
12. Horizontally from a terminal on the wall.
13. Above the roof pitch with roof slope of all angles.
Above flat roof.
14. From a single wall face.
From corner walls.
15. Below velux window
16. Above or side of velux window
* Only one reduction down to 25mm is allowable per installation
otherwise BS5440-1 2000 dimensions must be followed.
5. The flue assembly shall be so placed or shielded as to
prevent ignition or damage to any art of any building.
6. The air inlet/products outlet duct and the terminal of the
boiler MUST NOT be closer than 25mm (1") to combustible
material. Detailed recommendations on the protection of
combustible material are given in BS.5440-1:2000. In IE
refer to I.S.813:2002.
IMPORTANT. It is absolutely essential to ensure, in practice,
that products of combustion discharging from the terminal
cannot re-enter the building or any other adjacent building
through ventilators, windows, doors, other sources of natural
air infiltration, or forced ventilation / air conditioning.
If this should occur the appliance MUST be turned OFF,
labelled as 'unsafe' until corrective action can be taken.
TERMINAL
The terminal assembly can be adapted to accommodate
various wall thicknesses. Refer to Frame 12.

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. In
IE the requirements of I.S.813:2002 may be disregarded.
Min. Spacing*
BS5440-1 2000
BS5440-1 2000
BS5440-1 2000
BS5440-1 2000
BS5440-1 2000
1,200mm (48")
1,200mm (48")
1,500mm (60")
Vertical Terminals
2000mm (79")
300mm (12")
25mm ( 1")*
75mm (3")
25mm (1")*
200mm (8")
25mm (1")*
200mm (8")
25mm (1")*
150mm (6")
25mm (1")*
300mm (12")
300mm (12")
600mm (24")
300mm (12")
300mm (12")
300mm (12")
300mm (12")
300mm (12")
600mm (24")
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