12
Concord CXS -
Installation & Servicing
Note.
Frame 9 shows the relationship between the
overheat thermostat and the flow tapping.
d.
Complete the water connections by plugging the 2
front top tappings with the 2" BSP plugs provided.
Position the overheat thermostat phial into the thermostat
pocket at the opposite side to the flow pipe. The illustrations
below show the rear of the boiler with the flow and relative
overheat thermostat positions.
Ensure that the overheat thermostat phial and control sensor
are correctly secured in the pockets. Refer to Frame 13.
INSTALLATION
INST
ALLA
TION
8
BOILER ASSEMBLY
1.
Fit the distributor tube (supplied with the boiler) into one
of the return connections. That is one of the rear lower
ports. Refer to Frame 5.
Fit the flange using the M10 x 35mm screws and
washers provided.
Ensure that the tube flange aligns horizontally and that
the 2 sealing gaskets are correctly assembled on the
tube. Refer to alignment notches in Frame 5.
2.
Fit the 1" tapped flange to the other lower rear
connection using the gasket and M10 x 25mm screws
and washers provided.
3.
Temporarily screw the 2 handling bars (2" pipe) into the
top tappings and manoeuvre the boiler into position.
4.
Complete the system connections, using suitable
jointing compound, as follows:
a.
The flow connection may be made to either of the
rear top tappings (either at the same side as the
return or opposite the return).
To avoid air locks, any reduction in pipe size must be
made in the vertical plane or achieved by using
eccentric bushes.
b.
The 1" tapping in the redundant return flange may be
used for the cold feed on an open system or
connection of a pressure vessel if on a sealed
system.
If not required for this purpose it should be plugged.
c.
Fit the 2 thermostat pockets. Refer to Frame 9.
9
SYSTEM CONNECTIONS
One flow and return connection should be made to the rear of
the boiler - either on one side or opposite sides.
The distributor tube and gaskets, supplied with the boiler,
must be connected into the pumped return connection. Refer
to Frame 8.
2 thermostat pockets are supplied in the installation pack.
These must be fitted in the 2 top
1/2
" BSP tappings at either
side of the rear of the heat exchanger.
