4
21
5.
INSTALLATION REQUIREMENTS
NOTE: THIS APPLIANCE MUST ONLY BE INSTALLED WITH THE SUPPLIED ACCESSORIES AND TERMINAL.
5.1
FLUES
The ECONOMAIRE 90 is designed to be used with a 125mm flue and the supplied flue enlarger MUST be fitted directly on top of
the flue adaptor! The heater can be used with horizontal or vertical flue types C12 and C32 and you should also consult (or be
familiar with) British Standards BS 5440 Pt. 1 Flues
5.1.1
All joints must be soundly sealed.
5.1.2
Sufficient support brackets must be used in order to support the total weight of the flue system.
5.1.3
The flue must conform with Building Regulations and British Gas Materials and Installations specification (3
rd
edition) regarding clearance and shielding from combustible materials.
5.1.4
The horizontal flue length MUST NOT be less than 300mm plus 90
o
bend and MUST NOT exceed 18m excluding
terminal.
5.1.5
The total vertical flue length MUST NOT be less than 1m and MUST NOT exceed 18m excluding terminal.
5.1.6
Total length refers to the equivalent worked flue length and therefore includes bends and NOT the distance from the
heater to the flue terminal.
5.1.7
When calculating total flue length, reference MUST be made to the following ‘equivalent lengths’:
A)
90
0
bend = 3m
B)
45
0
bend = 1.5m
5.1.8
The maximum number of 90
o
bends that can be used is:
A)
Horizontal = 6
B)
Vertical = 6
5.1.9
If a ‘short flue’ is used, the factory fitted flue orifice MUST be left in place (see Fig.3).
5.1.10 ‘short flue’ refers to a total flue length not exceeding:
A)
Horizontal (plus 90
o
bend) = 0.8m
B)
Vertical (including terminal) = 7m
5.1.11 Where the total flue length exceeds these lengths, the flue orifice MUST be removed.
5.1.12 The heater is supplied with either a horizontal or vertical flue,
dependant upon your specification when ordering. Reference
should be made to Table 2 for extra flue/terminal components.
5.2
HORIZONTAL TERMINAL LOCATION:
5.2.1
The terminal must be positioned on the outside of the
building and allow for the free passage of air across it
at ALL times.
5.2.2
Avoid positions where the terminal is adjacent to
projections, particularly under a balcony or
immediately adjacent to a drain pipe.
5.2.3
The terminal position must ensure that combustion
products cannot enter the building in which the heater
is installed (or any adjacent building) through
windows, doors or by any others means.
5.2.4
Fig. 4 shows recommended terminal positions
5.2.5
The flue MUST be fitted with the protrusion as shown
in Fig. 5
5.2.5
If the heater is to be installed in a timber framed
building you MUST consult the Institute of Gas Engineers document UP/7, or your local gas region.
5.2.6
Where the lowest part of the flue terminal is located less than 2 metres above the ground, a balcony, or above
a flat roof across which there is access, the terminal MUST be fitted with a Tower Flue Components guard,
part number: TGD1111105 (or similar) such that the distance between the guard and the nearest part of the
terminal is no less than 50mm.
5.2.7
Reference should be made to Table 2 for required terminal components and guard.
5.2.8
NOTE: TO ENSURE THAT RAINWATER CANNOT ENTER THE HEATER UNIT, THE FLUE MUST BE
INSTALLED WITH A SLIGHT FALL AWAY FROM THE HEATER.
Fig. 3
Flue Adaptor and Orifice
Flue Adaptor
Orifice
Fig. 17
Exploded Diagram
24
31
28
9
20
18
18a
19
17
15
16
5
29
25
1
22
10
6
13
12
7
7a
8
23
27
14
30
2
26
11
4
3
21
