Installation shall be in accordance with the current editions of:
Building Standards (Scotland) (Consolidation) Regulations
Building Regulations
Gas Safety (Installation and Use) Regulations (as amended)
BS 7671 Institute of Electrical Engineers (I.E.E) Wiring Regulations
BS 6891 Installation of Low Pressure Gas Pipework of up to 28mm (R1) in domestic premises (2nd family gases).
BS 5440 Pt.1 (Flues for Gas Appliances)
BS 5440 Pt.2 (Air Supply for Gas Appliances)
BS 5864 Installation of Gas Fired Ducted Air Heaters
BS 5482 Pt.1 Installation of LPG appliances in permanent dwellings
BS 5482 Pt.2 Installation of LPG appliances in caravans and non-permanent dwellings
British System Design Manual “Gas Fired Warm Air Heating”
Model and Local Authority Bye-laws
2.
HEATER COMPARTMENT AND CLEARANCES
(See BS 5864)
2.1
When the heater is fitted into a compartment, a minimum clearance from the compartment walls of 6mm (1/4 in ) at the sides
and rear, and 25mm (1 in) at the front must be left. Consideration should be given to the space required for the removal and
replacement of the filter tray and the entry of the gas and electrical supplies.
2.2
For service access, a minimum of 450mm (18ins) is required at the front of the heater. Space must also be allowed, in a
compartment installation, to permit the removal of the heater. The clearance between the appliance and the compartment
should be not less than 75mm (3 in). However, if clearances are less than 75mm, the internal surface of the compartment
must be lined with noncombustible material. The compartment must be of a fixed rigid structure.
2.3
In airing cupboard installations, the part used as the air heater compartment must comply with the relevant section of BS
5864 and must be completely separated by either a noncombustible partition or a perforated metal partition with the
perforations not exceeding 13mm (1/2in). The secondary flue must be a tight fit where it passes through the partition and
must be suitably protected (see BS 5440: Part 1).
2.4
In under-stairs installations, the compartment must comply with the relevant section of BS 5864, provided that in addi-
tion, all internal surfaces, including the base, are noncombustible or lined with noncombustible material. This require-
ment is applicable only to dwellings of more than two storeys. Combustible floors must be insulated from the heater.
2.5
In slot fit installations (for caravan installations see instructions packed with Slot Fit Kit TS30 or TSA30), the slot fit
compartment must comply with the appropriate section of BS 5864. Side and rear clearances should be no less than 6mm
(
1
/
4
in).
2.6
In freestanding installations (see instructions packed with the Top Closure kit TCB30), only one or two walls will be in
contact with the air heater; and therefore must comply with the appropriate sections of BS 5864.
2.7
The base duct on which the air heater stands must be placed on a noncombustible floor.
2.8
IMPORTANT: When the heater is installed in a compartment, the Safety Label supplied with the heater MUST BE AFFIXED
in a PROMINENT POSITION on the INSIDE of the COMPARTMENT DOOR.
3.
VENTILATION AND COMBUSTION AIR
3.1
The room or internal space in which the heater is installed requires a permanent air vent of minimum effective area 13cm
2
(2 in
2
). The air vent should be either direct to outside air or to an adjacent room or internal space (other than a toilet or
bathroom) that itself has an equivalent air vent direct to outside.
3.2
Combustion air may be introduced, via a 100mm (4in) nominal bore pipe, connected to a return air duct or plenum from a
ventilated area and fitted with a lockable damper. The damper should be adjusted to control combustion airflow to
0.0064m
3
/s (13.6cfm), (i.e. 0.86m/s [160ft/min] velocity in a 100mm [4in] bore pipe). If this arrangement is used, a non-
closeable warm air register MUST be provided in the same area as the front of the air heater or heater compartment if a
return air grille is not located in that area.
3.3
When installed in a compartment, two permanent ventilation openings into the compartment are required, one at high
level and one at low level, both communicating either directly with outside air or with a ventilated room or space. The
minimum effective areas specified in Table 1 are related to the rated heat input of the Air Heater.
3.4
If any room or area from which air is drawn for ventilation or combustion contains an extract fan, the permanent vents must
be sized to ensure that the operation of the appliance at full rate is not adversely affected. A spillage test as specified in sub-
para 6.7 (Safety Checks) is carried out and any remedial work undertaken.
2
ZZ1031/4
ZZ1031/4
17
Fig. 6, JB25P Mk 5 FUNCTIONAL DIAGRAM
Содержание JB25P MK 5
Страница 18: ...18 ZZ1031 4 Fig 7 PRINCIPAL DIMENSIONS mm ...
