22
Fig.6
4.12
BOILER INTERLOCK CONTROL
Central heating system controls should be
installed to ensure the boiler is switched off
when there is no demand for heating, in
compliance with Building Regulations.
The boiler has its own built in bypass.
If the system has thermostatic radiator valves on
all radiators, or two port valves, then a bypass
circuit must be fitted with an automatic bypass
valve to ensure a flow of water should all valves
be in the closed position (fig. 6).
It is important that the system is flushed
thoroughly before the appliance is fitted or
left to operate (as recommended in BS 7593)
in order to maintain an efficiently operating
heating system. For replacement installations,
the system MUST be flushed with the old boiler
insitu, in order to prevent system debris. Once
the system has been flushed, an inhibitor
(suitable for stainless steel and aluminium
and aluminium heat
exchanger) should be added (see section
4.18).
4.13
DRAINING TAP
These must be located in accessible positions
to permit the draining of the whole system.
The taps must be at least 15 mm nominal size
and manufactured in accordance with BS 2870
1980.
4.11 PIPEWORK
Copper tubing to BSEN 1057:1 2006, BSEN
1172, BSEN 1652 and BSEN 1653, is
recommended for water pipes. Jointing
should be either with capillary soldered or
with compression fittings.
Where possible pipes should have a gradient
to ensure air is carried naturally to air release
to ensure air is carried naturally to air release
points and water flows naturally to drain
points and water flows naturally to drain
taps. It should be ensured as far as possible
taps. It should be ensured as far as possible
that the appliance’ s heat exchanger is not a
that the appliance’ s heat exchanger is not a
natural collecting point for air except where
natural collecting point for air except where
providing useful heat. Pipes should be
providing useful heat. Pipes should be
insulated to prevent heat loss and to avoid
insulated to prevent heat loss and to avoid
freezing. Particular attention should be paid
freezing. Particular attention should be paid
to pipes passing through ventilated spaces in
to pipes passing through ventilated spaces in
roofs and under floors.
roofs and under floors.
IMPORTANT:
IMPORTANT:
A minimum length of 1 metre of copper pipe
MUST be fitted to both flow and return
connections from the boiler before connection
to any plastic piping.
The water through the appliance heat exchanger
circuit must exceed the min. 2.38 gals/min. (650
L/h) when the burner is firing. It is important to
ensure that this rate is achieved when sections
of the system are shut off either manually or by
automatic controls.
If the volume of circulating water is too low, the
boiler water temperature will rise too rapidly.
This could cause noise in the system or even
cause the safety thermostat to trip.
This appliance is designed to work on a two
pipe system as shown in fig.6.
Summary of Contents for CS 80 T
Page 2: ...2 ...
Page 21: ...21 4 10 FLUE TERMINAL POSITION ...
Page 54: ...10 ELECTRICAL SYSTEM DIAGRAM 54 Fig 56 ...
Page 55: ...55 11 SPARE PARTS Fig 57 ...
Page 61: ...61 ...
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Page 64: ...64 FLOWCHART FOR CO LEVEL AND COMBUSTION RATIO CHECK ON COMMISSIONING A CONDENSING BOILER ...
Page 65: ...65 12 1 ANALYSER CHECK LIST ...
