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V 1.9
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PASHW-003-100LD
If installing the unit in unvented configuration, an “unvented Pack”,
containing the required safety valves must be supplied with the unit and
there is likely to be an additional cost for this.
4.3 Outlet Fittings
The unit can be used in conjunction with most types of terminal fittings. It is
helpful in many mixer showers to have balanced hot and cold water supplies;
in these instances the balanced cold water supply can be taken from the
tapping on the combination valve. Branches to cold drinking water outlets
should be taken before the combination valve.
NOTE:
Accessories should have a rated operating pressure of at least
0.8 MPa (8 bar).
4.4 Limitations
The unit should not be used in any of the following instances:
• With a water supply from solid fuel boilers or any other boiler in which
the energy input is not under effective thermostatic control, unless
additional, necessary and appropriate safety measures are installed.
• With gravity circulation primaries unless a good head of pressure is
available.
• With a steam heating plant unless additional and appropriate safety
devices are installed.
• With ascending spray type bidets or any other facility where there is a
Class 5 back-siphoning risk requiring that an appropriate air gap be
employed.
• With water supplies that have either inadequate pressure or where
the supply may be intermittent.
• In situations where it is not possible to pipe away any discharge from
the safety valves safely.