- Hewlett-Packard Plumbing Product User Manual

3
Combi HP thermostatic mixer shower
SITING REQUIREMENTS
D-003-A
SITE REQUIREMENTS
The installation must be in accordance with
W
ater Regulations/Bylaws.
Minimum running water pressure: 1 bar.
Maximum running water pressure: 5 bar.
Maximum static water pressure: 10 bar.
For the best performance within the specified
pressure range both hot and cold water supplies
must be fed from a common supply and a
minimum flow of 8 litres per minute should be
available to both inlets.
W
hile the mixer valve is operational (open
outlet), inlet pressures MUST NOT be capable of
exceeding 7 bar. For effective operation of the
internal seals, the maximum static pressure must
not be exceeded.
Note: On sites where the running pressure is
above 5 bar, the use of a suitably sized pressure
reducing valve fitted in the cold mains supply
pipework can provide nominally equal pressures
at the mixer valve. This should be installed as
indicated on the appropriate diagrams shown on
the following pages, and set to within the
specification of the valve.
For the best performance of this shower both hot
and cold water supplies to the shower valve
should be fed at nominally equal pressures.
The pipework should be installed such that the
fl
ow is not significantly affected by other taps
and appliances being operated elsewhere on the
premises.
Note: Where thermal store/combi boilers or
multi-point heaters are used, if excessive draw
offs take place the boiler may not be able to
maintain an adequate output temperature. This
could result in the shower temperature becoming
noticeably cooler.
For effective thermostatic control the
temperature of the hot water entering the mixer
should remain a minimum of 10°C above the
selected output temperature.
The supply pipework must be flushed to clear
debris before connecting to the shower control
accordance with Water Regulations and Bylaws.
DO NOT use jointing compounds on the
pipework.