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Bar mixer shower
6
TYPICAL DOMESTIC INSTALLATIONS
Pumped gravity fed systems (
fig.1)
The shower control MUST be fed from a cold
water cistern and hot water cylinder providing
nominally equal pressures.
The mixer unit may be used with a gravity fed
system with a pump to boost pressures as shown;
please refer to the pump installation guide to
establish the minimum head requirements for
automatic operation of the pump.
Instantaneous gas-heated systems,
e.g. combination boilers (fig.2)
The shower control MUST be installed with a
multi-point gas water heater or combination
boiler of a fully modulating design (i.e.
to maintain relatively stable hot water
temperatures).
A drop tight pressure reducing valve MUST
be fitted if the supply pressures exceed 5 bar
running.
An expansion vessel
MAY
be fitted, and regularly
maintained, to prevent the shower mixer
being damaged by excess pressures. This may
already be installed within the boiler (check with
manufacturer) and is in addition to the normally
larger central heating expansion vessel.
*Fig.2
*
(diagrammatic view – not to scale)
*Fig.1
*
(diagrammatic view – not to scale)
Hot water
cylinder
Mixer
Cold supply
Hot
supply
Alternative supply
(must be below
vent pipe tee)
Cold
water
mains
supply
Drain
valve
Gate
valve
Stop valve
Cold water
cistern
Minimum head
Other
draw-offs
Draw-off must point
down to avoid airlock
issues
Ring main
Isolating switch
or pull cord
switch (both
fused at 3A)
Service
valve
Service
valve
Pump
CH flow
Cold
mains
supply
Hot water
CH return
Service
valves
Mixer
Stop
tap
Expansion
vessel
Pressure
reducing valve
Combination
boiler
Содержание Bar Mixer Shower With Diverter
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