Flue Installation; Gas Supply; Air Supply; Water Circulation System - IDEAL isar HE24 Installation And Servicing

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For the minimum clearances required for safety and
subsequent service, see the wall mounting template and
Frame 2. In addition, sufficient space may be required to
allow lifting access to the wall mounting plate.

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 CORGI registered engineer. In IE by a competent person.
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.
N.B. The principle of the 1:1 gas valve ensures that the isar
HE range is able to deliver it's full output at inlet pressures
down to 14mb. However if dynamic pressures below 20mb are
experienced ensure this is adequate for ALL other gas
appliances in the property.
IMPORTANT.
Installation pipes must be fitted in accordance with BS.6891. In
IE refer to IS.813:2002. Pipework from the meter to the boiler
MUST be of an adequate size, i.e. no longer than 20m and not
less than 15mm O.D.
The complete installation MUST be tested for gas soundness
and purged as described in the above code.
Table 4 - 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.
Vertical Terminals
13. Above the roof pitch with roof slope of all angles.
Above flat roof.
14. From a single wall face.
From corner walls.
* Only one reduction down to 25mm is allowable per installation
otherwise BS5440-1 2000 dimensions must be followed.
8
GENERAL
Min. Spacing*
300mm (12")
25mm ( 1")*
BS5440-1 2000 75mm (3")
25mm (1")*
BS5440-1 2000 200mm (8")
25mm (1")*
BS5440-1 2000 200mm (8")
25mm (1")*
BS5440-1 2000 150mm (6")
25mm (1")*
BS5440-1 2000 300mm (12")
300mm (12")
600mm (24")
1,200mm (48")
1,200mm (48")
1,500mm (60")
300mm (12")
300mm (12")
300mm (12")
300mm (12")
300mm (12")

FLUE INSTALLATION

Pluming will occur at the terminal so 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 4.
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
Ensure that the guard is fitted centrally.
5. The flue assembly shall be so placed or shielded as to
prevent ignition or damage to any part 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.
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.

WATER CIRCULATION SYSTEM

IMPORTANT.
A minimum length of 1 metre of copper pipe MUST be fitted to
both flow 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 Frame 6
Tel. + 44 (0) 01732 359 888
Fax. + 44 (0) 01732 354 445
www.tfc-group.co.uk
isar -
Installation and Servicing