Page 12 of 51
6.3 Mounting the Boiler
Prepare the Boiler for mounting as in 6.1.Determine the positions for the flow and return pipes using the
suspension bracket or a suspension frame, if any. When marking the holes, ensure that the suspension bracket
or frame is level. Drill the holes for the flow and return pipes if required then hook the heating boiler onto the
bracket or place it upon the frame.
6.4 Air supply & flue types
When using multiple SCB Boilers on a common flue the inbuilt cascade control must be used.
SCB
Boilers 60kw to 100kw use a co-axial flue. Twin pipe flue-ing utilises an adaptor at extra cost .Boilers 120.
150 and 180 kw use parallel i.e. one air inlet tube and one exhaust tube a co-axial adaptor is available at
extra cost. . All Boilers can be used in a room sealed application or, if the boiler room or fitting space
complies with the relevant ventilation requirements Boilers can be non room sealed I.E. exhaust only,
Providing ventilation as per current regulations is in place. See pages 10 and 11 for flue connections.
Install the horizontal flue parts under 1% fall in the direction of the boiler (one centimetre for every
linear metre). Adequate drain points should be installed throughout long horizontal exhaust runs and
at the base of any vertical flue exhaust run. 60 mm (minimum ) “u” traps should be utilized.
6.5 The air inlet and flue gas outlet system.
The Boiler is ( normally )room sealed, the casing is airtight with air entering through the air supply
connection only. Always ensure the casing is placed over the boiler when the boiler is in operation! The
available pressure for the inlet and flue system is 250
Pa, unless data from the table is being used.
N.B.!
Install the horizontal flue parts under 1%
fall in the direction of the boiler (one centimetre
for every linear metre).
Failing to do so may result
in water condensation building up in the flue gas
tube. In turn, this may cause failure.
The impact of the flue to the output
The table on the left shows the relationship between
the Boiler output and the resistance of the air inlet
and flue. Up to a resistance of around 250 Pa the
output will be approximately the same as the Boiler
data plate In the event of a greater resistance ( up to
maximum 600 Pa ) this will change the Boiler output
. The resistance and the change of output only affect
the maximum output and not the minimum.
Tip! Remember that possible output changes may
influence hot water production and
transmission/absorption calculations.
Resistance
Decrease of input
up to 250 Pa
0 %
300 Pa
- 3 %
350 Pa
- 4 %
400 Pa
- 6 %
450 Pa
- 7 %
500 Pa
- 8 %
550 Pa
- 9 %
600 Pa
-10 %
40
60
80
100
120
140
160
180
0
100
200
300
400
500
600
Pa
kW
A60
A80
A100
A120
A150
A180
180
150
120
100
80
60
Содержание SC-B
Страница 5: ...Page 5 of 51 2 TYPICAL SYSTEM LAYOUTS 2 1 Single Boiler Layout ...
Страница 42: ...Page 42 of 51 14 EXPLODED VIEW DIAGRAMS ...
Страница 45: ...Page 45 of 51 14 2 Burner fan gas pipe heat exchanger casing S CB 150 S CB 180 Figure 5 S CB150 S CB 180 ...
Страница 47: ......
Страница 49: ...Page 49 of 51 14 4 Pipes pump S CB 150 180 Figure 6 S CB 150 S CB 180 ...