4 General Requirements
Instructions for installation and servicing aquaPLUS VUI 362-78
4 General Requirements
4.1 Preliminary remarks
This appliance should only be installed in conjunction
with a Vaillant flue system.
Install the flue system as detailed in the separate flue
installation instructions supplied with this boiler.
4.2 Related Documents
The installation of the boiler must be in accordance with
the relevant requirements of Gas Safety (Installation
and Use) Regulations 1998, Health and Safety Document
No. 635 (The Electricity at Work Regulations 1989),
BS7671 (IEE Wiring Regulations) and the Water Supply
(Water Fittings) Regulations 1999, or the Water Bylaws
2000 (Scotland). It should also be in accordance with
the relevant requirements of the Local Authority,
Building Regulations, Building Regulations (Scotland),
Building Regulations (Northern Ireland) and the relevant
recommendations of the following British Standards,
including current amendments to Approved Documents
Part L and J:
BS 5440: Flues and ventilation of gas fired boilers not
exceeding 70 kW net:
- Part 1: Flues
- Part 2: Ventilation
BS 5449: Specification for forced circulation hot water
for domestic premises.
BS 5546: Specification for gas hot water supplies for
domestic premises.
BS 6700: Services supplying water for domestic use
within buildings and their curtilages.
BS 6798: Specification for installation of gas fired
boilers not exceeding 70 kW input.
BS 6891: Specification for installation of low pressure
gas pipework up to 28 mm (R1) in domestic premises
(2
nd
family gas).
BS 7593: Treatment of water in domestic hot water
central heating systems.
Institute of Gas Engineers Publication IGE/UP/7/1998:
Guide for Installation in Timber Framed Housing.
Benchmark Code of Practice, Building Regulations
Approved Documents Part L 2002, Part J 2002.
4.3 Boiler location
The location chosen for the boiler must permit the
provision of a satisfactory flue termination. The location
must also provide adequate space for servicing and air
circulation around the boiler. The boiler may be installed
in any room, although particular attention is drawn to
the requirements of BS7671 (IEE Regulations) and, in
Scotland, the electrical provisions of the Building
Regulations (Scotland) and in IE the current edition of
IS 813 and the current ETCI rules, in respect of the
installation of a boiler in a room containing a bath or
shower.
Where the installation of the boiler will be in an unusual
location, special procedures may be necessary and BS
5546 and BS 6798 give detailed guidance on this
aspect. The boiler must be mounted on a flat, vertical
wall, which must be sufficiently robust to take the
weight of the boiler. The boiler may be installed on a
combustible wall, subject to the requirements of the
Local Authorities and Building Regulations.
A compartment used to enclose the boiler must be
designed and constructed specifically for this purpose.
(An existing cupboard or compartment may be used
provided that it is modified for the purpose). Details of
essential features of cupboard/compartment design
including airing cupboard installations are given in
BS 6798.
If the boiler is to be fitted in a timber framed building, it
should be fitted in accordance with Institute of Gas
Engineers Publication IGE/UP/7/1998 "Guide for Gas
Installation in Timber Framed Housing".
4.4 Gas Supply
• The gas supplier should ensure the availability of an
adequate supply of gas.
• A gas meter may only be connected to the service
pipe by the supplier of gas or their contractor.
• An existing meter should be checked to ensure that it
is capable of passing the rate of gas supply required.
• Installation pipes should be fitted in accordance with
BS 6891.
• Pipework from the meter to the boiler must be of an
adequate size. Do not use pipes of a smaller size than
the boiler gas connection (22 mm).
• The complete installation must be tested for
soundness and purged as described in BS 6891.
Important: The appliance must be installed and
serviced by a competent person as stated in the Gas
Safety (Installation and Use) Regulations 1998. In IE, the
installation must be in accordance with the current
edition of IS 813 'Domestic Gas Installations', the
current Building Regulations and reference should be
made to the current ETCI rules for electrical installation.
Note: Where a room sealed boiler is installed in a room
containing a bath or shower, any electrical switch or
boiler control utilising mains electricity should be so
situated that it cannot be touched by a person using the
bath or shower.
