Technical data

7
3.5 thermal performance – heat output limits
The Strata 3 – 220 can be limited to a maximum thermal loading between 42kW and 210kW.
The Strata 3 – 330 can be limited to a maximum thermal loading between 63kW and 316kW.
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 Regulation 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: BS6644, BS6880, IGE/UP/2, IGE/UP/7, & IGE/UP/10.
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 Midmat HT boiler:
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 for adequate space for
installation, servicing, operation, and for adequate air circulation around it. (Refer to fig 4.2a).
This position MUST allow for a suitable flue system and terminal position (Refer to section 4.3). A
connection to a suitable termination point for the discharge of condensate must be available. If this is not
present, a condensation pump with an elevation level of 5 metres (available from MHS) may be fitted to
the appliance. TheMidmat HT – 220 and 330 must be installed on a flat horizontal floor capable of supporting
the boiler and any ancillaries (circa 320kg for the 220 and 360kg for the 330).
In boiler plant rooms where there is a risk of air contamination as a result of halogenated hydrocarbons
(eg contained in spray cans, solvents and cleaning agents, dyes, adhesives) or heavy dust deposits, the boiler
must be provided with a room sealed air supply. (See figure 4.2a) for plant room clearances. If the Strata
3 is operated on a room air dependent basis in these (or similar) conditions, faults may arise. In this case,
no guarantee claim will be accepted. The boiler room must be dry and frost free.
Dimensions & Clearances mm Strata 3 220 & 330
A 500
B 1000
C 650
D 628
E 1755
Above Boiler Model 220 370
Above Boiler Model 330 600
ADA A
C
A
E
boiler plant room
B
Fig 4.2a