Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si
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ST0109 – C 05/09
WATER
The port connections for the indirect heating flow and return are identified in Figure 1
for the SCxn…
i
range and in Figure 2 for the SCxn…
si
range.
Should the flow connection be the highest point in the indirect heating loop an adequate
device for de-aeration has to be installed. Equally, should the return connection be the
lowest point in the indirect heating loop, a suitable drain device should be installed in
the lowest point.
When installing the motorised two port valve ensure the direction of flow is adhered to
as marked on the body of the device. Connecting the control loop ensure the correct
thermostat on the cylinder is chosen for the respective loop.
The fittings used to connect to the cylinder must be suitable for stainless steel. Not all
push fit fittings can be used – please check with your supplier. Should compression fit-
tings be used ensure that the connection is not being over-tightened, always countering
the force with a second spanner.
5.7 Solar loop
The solar loop has to be completely installed:
- in metal pipe work
- insulated with high temperature insulation
- connected with compression fittings only (or other means which are suitable for solar)
Figure 9 – Solar loop installation
13
SCxn…s
d
/ SCxn…
si
12
14