10| SAHP - Installation Manual
V3 June 2021US - SD667052
PLUMBING
INSTALLATION continued
4.9
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supply to the SAHP before the adjustable pressure reduction valve.
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4.10
It is good practice to position the mains inlet control manifold at the
top of the unvented unit to ensure that the cylinder does not have to
be drained down for the purpose of maintenance.
4.11
The expansion vessel can be mounted in any Orientation. Access
must be available to the top and bottom of the vessel. The vessel
à Õ`LiwÝi`Ì>Ã`Ü>ÕÃ}Ì iLÀ>ViÌëÀÛ`i`°*i>Ãi
remember that the vessel will get much heavier once it has water in it.
4.12
For mixer showers and taps a balanced cold feed at the same pressure
as the hot feed may be necessary. A 3/4” balanced connection on
the inlet manifold is provided for this purpose. Pipe work should
initially run in 3/4” then this can be reduced where necessary.
4.13 NOTE: We highly recommend installing a thermostatic
mixing valve in system where the set point temperature of
either the heat pump or any heat sources connected to the
boiler coil are set to 120
O
F or above.
4.14
All exposed pipe work should be insulated and additional
considerations should be taken to protect the unit from frost damage.
Particular care is needed if the cylinder is to be installed in an exposed
location such as an out building or garage.
4.15
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V iV>`Ì} Ìi>ViVÌÃVÕ`}v>VÌÀÞwÌÌi`ViVÌÃ
as they may work loose during transportation and positioning.
All of the pipe work connections on the cylinder are either 3/4”
compression or 3/4” copper tube should only be used to
connect to these connections. Good working practices should be
used when preparing pipe work such as using correct pipe cutters
and de-burring.
4.16
The boiler coil connections supplied are compression connections.
The boiler circuit must be positively pumped, gravity circulation will
not provide the required heat transfer through the coil.
SECTION 4
