Technical data

8
STRATA2
3.3 system guidance
In summary, the Strata is designed for use with a sealed pressurised hydronic circuit operating upon a
design temperature difference of 20ºC. The integral primary pumps have approximately 1m head available
to overcome a primary loop incorporating a low velocity mixing header. Full details regarding suitable
system designs are given in section 4.3.
3.4 flue options
The Strata 2-120 may be used with either an open or room sealed flue and air system. Approximately
100Pa is available as residual flue pressure at the exit from the appliance. Full details regarding flue
specification are given in section 4.3.
4.0 appliance
installation requirements
4.1 statutory requirements
Gas Safety (Installation and Use) Regulations (Current Issue)
It is the law that all gas appliances are installed by a registered person, in accordance with the above
regulations. Failure to install appliances correctly could lead to prosecution. It is in your own interest, and
that of safety, to ensure that the law is complied with.
In addition to the above regulations, this appliance must be installed in accordance with the current IEE
Wiring Regulations for electrical installation, (BS 7671), Local Building Regulations, the Building Standards
(Scotland) (Consolidation) Regulations, Bye laws of the Local Water Undertaking and Health and Safety
Document No. 635 ‘The Electricity at Work Regulations 1989’.
It should also be in accordance with the relevant recommendations in the current editions of the
following British Standards and Codes of Practice, plus any others that are relevant to the proposed
installation: BS5449, BS5546, BS5440:1, BS6798, BS6891, BS6644, BS6880, IGE/UP/2, IGE/UP/7, & IM11.
Clean Air Act Memorandum on Chimney Heights.
Important Note: Manufacturer’s instructions must NOT be taken in any way as overriding
statutory obligations.
4.2 boiler position
The following considerations must be observed when siting the Strata 2-120:
The boiler is not suitable for external installation. The position selected for installation should be within
the building, unless otherwise protected by a suitable enclosure, and MUST allow adequate space for
installation, servicing, and operation of the appliance, and for air circulation around it. (Refer to figure 4.3e).
In a multiple set-up (modular set-up), the sides of the units may be placed against one another, without any
room in between.
This position MUST allow for a suitable flue system and terminal position (Refer to sections 4.3). A
connection to a suitable termination point for the discharge of condense must be available . If this is not
present, a condensation pump with an elevation level of 5 metres may be fitted to the appliance. The Strata
2-120 must be installed on a flat horizontal floor which is capable of supporting the boiler and any ancillaries
(circa 200kg).
If the appliance is to be fitted in a timber framed building it should be fitted in accordance with the
British Gas publication ‘Guide for Gas Installations In Timber Frame Housing’, Reference DM2. If in doubt,
advice must be sought from the Gas Supplier.
If the appliance is to be installed in a room containing a bath or a shower, any electrical switch or
control utilising mains electricity must be so situated that it cannot be touched by a person using the bath
or shower. Attention is drawn to the requirements of BS7671 (the current I.E.E. Wiring Regulations), and
in Scotland the electrical provisions of the Building Regulations applicable in Scotland.
A compartment used to enclose the appliance MUST be designed and constructed specifically for this
purpose. An existing cupboard, or compartment, may be used provided it is modified accordingly. BS
5376:2 gives details of the essential features of cupboard/compartment design, including airing cupboards.