9
Float operated valve
Stop or servicing valve
Shower control
Warning or overflow pipe
Drop tight pressure reducing
valve (PRV)
Key to symbols appearing throughout this guide.
1.
Layout and sizing of pipework must be such that when other services are used,
pressures at the shower control inlets do not fall below the recommended minimum
(
1 bar
). The pressure balancing performance is impaired below 1 bar. When fitted
with some heater appliances the minimum maintained pressure may be above 1
bar, refer to the section
Commissioning: “Multipoint gas water heaters”
or
“Combination boilers”
.
2.
The Mira CombiForce 415 is
not suitable
for installation as part of a gravity-fed
plumbing system (i.e. in conjunction with a hot water cylinder and cold water
storage cistern), unless used in conjunction with an inlet pump producing a
maintained pressure of at least 1 bar.
3.
When used with a
fully modulating
multipoint or combination boiler
above 5 bar
maintained pressure
, a pressure reducing valve will be necessary. For information
on measuring system pressures refer to
Installation Requirements: "Measuring
System Pressures"
. For further information on pressure reducing valves consult
your local plumbing stockist.
4.
Supply pipes
MUST
be flushed to clear debris before connecting the shower
control.
5.
Conveniently situated isolating valves
MUST
be fitted for servicing purposes.
6.
If the shower control is to be used with a fully modulating multipoint water
heater, fully modulating combination boiler, thermal store or unvented system
an expansion vessel must be fitted to accommodate the expansion of water in
the domestic hot water supply (this may already be part of the system, check
the details on the boiler/heater or contact the boiler/heater manufacturer).
7.
No form of outlet flow control should be fitted, only Mira recommended fittings
should be used in the outlet pipework.
6
Installation Requirements
Section
Twin impeller inlet pump
Tempering valve
Mini expansion vessel
Non-return Valve
Summary of Contents for Combiforce 415
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