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6. HEATER COMPARTMENT CLEARANCES
(see BS 5864)
6.1 IMPORTANT - If the heater is to be fitted to an existing base duct (warm air plenum), always ensure when
installing the appliance, the rear left hand corner of the heater is aligned with the rear left hand corner of the
base duct. If there is any overhang or blanking off it will be at the front or right hand side of the heater. In any
event, blanking plates must be mechanically secured and all joints sealed.
6.2 When the heater is fitted into a compartment, a minimum clearance from the compartment walls of 38mm
(1½”) at the rear, 75mm (3”) total at the sides (with a minimum of 25mm (1”) at any one side), and 63mm
(2½”) at the front must be left. Consideration should also be given to the space required for the removal and
replacement of the filter tray and the entry of the gas and electrical supplies.
6.3 For service access, a minimum of 600mm (24”) 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”). However, if clearances are less than 75mm, the internal
surface of the compartment must be lined with non-combustible material and the compartment must be of
a fixed rigid structure.
6.4 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 non-combustible partition or a perforated
metal partition with the perforations not exceeding 13mm (½”). The secondary flue must be a tight fit where
it passes through the partition and must be suitably protected (see BS 5440: Part 1).
6.5 In under-stairs installations, the compartment must comply with the relevant section of BS 5864, provided
that in addition all internal surfaces (including the base) are non-combustible or lined with non-combustible
material. This requirement is applicable only to dwellings of more than two storeys.
6.6 Where the air heater is to be installed onto a combustible surface and under-floor ducting used, a suitable
base tray (BT65/90) MUST be used in order to provide insulation.
NB: Where a base plenum is used no base tray is required!
5. TECHNICAL DATA
TABLE 1
ECONOMAIRE 65
ECONOMAIRE 65
INTEJAN
WEIGHT
48kg 86kg
GAS G20
GAS SUPPLY PRESSURE
20mbar
GAS CATEGORY I 2 H
COUNTRIES OF INSTALLATION GB & IE
ELECTRICAL SUPPLY
230v ~ 50Hz fused 5A (150 watts)
NOx Class 1
MAXIMUM WATER SIDE
OPERATING PRESSURE (PMS)
n/a 3 bar
OPEN VENTED SYSTEM n/a YES
SEALED SYSTEM n/a YES
AIR HEATER WATER CIRCULATOR
MINIMUM MAXIMUM
KW MJ/h Btu/h KW MJ/h KW KW MJ/h Btu/h
INPUT (GROSS)
21.6 77.6 73,550 25.0 90.0 85,302 4.86 17.5 16,600
OUTPUT 16.1 58.0 55,000 19.1 68.6 65,000 3.5 12.6 11,900
GAS RATE CV 1037Btu/FT³ 2.05m
3
/h (72.62ft
3
/h) 2.38m
3
/h (84.22ft
3
/h) 0.458m
3
/h (16.2ft
3
/h)
BURNER SETTING PRESSURE (HOT)
11.5mbar (4.6 in wg) 15.5mbar (6.2 in wg) 15.0mbar (6.0 in wg)
MAIN INJECTOR Bray Cat 23/850 Amal 187/001/400
CROSS-LIGHTER INJECTOR
Bray Cat 10/60