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PLUMBING REQUIREMENTS
DO NOT use jointing compounds on any pipe
fittings for the installation.
DO NOT solder fittings near the mixer shower
as heat can transfer along the pipework and
damage the mixer valve.
DO NOT subject the unit to a water temperature
above 80°C during installation, use, maintenance
or disinfection.
IMPORTANT:
•
The layout and sizing of pipework MUST
be such that nominally equal inlet supply
pressures are achieved and the effects of
other draw-offs are minimised.
•
The pipework should be installed such
that other taps and appliances being
operated elsewhere on the premises do not
significantly affect the flow
•
When connecting pipework avoid using tight
90° elbows; swept or formed bends will give
the best performance.
•
The hot water pipe entry MUST be made to
the left-hand side inlet, marked HOT, 'H' or
with a red/orange label.
•
Suitable isolating valves (complying with
Water Regulations and Bylaws) MUST be
fitted on the hot and cold water supplies
to the shower as an independent means
of isolating the water supplies should
maintenance or servicing be necessary;
position as close as is practicable to the water
supply inlets of the mixer shower. If this
isolator is fitted in a loft space, the loft must
have a fixed access ladder and be boarded,
with appropriate lighting from the access
point to the isolator.
•
It is preferable to flush the pipework to clear
the system of debris and check for leaks
before connecting to the mixer.
•
The mixer inlets contain removable filters
that may become blocked if debris is not
flushed through before fitting.
Commercial Applications
•
It is recommended that for all commercial
applications, easily accessible, in-line filters
are used to aid maintenance.
Asti Bar Mixer Shower
Hard Water Areas
a. If it is intended to operate the shower
in areas of hard water (above 200-ppm
temporary hardness), a scale inhibitor
may have to be fitted. For advice on the
scale inhibitor, please contact Customer
Experience.
b. For best performance the shower head MUST
be regularly cleaned to remove scale and
debris.
WATER SYSTEM REQUIREMENTS
This mixer shower is suitable for:
•
Gravity water systems
•
Pumped gravity systems
•
Fully modulating type combination boilers
•
Multi-point hot water heaters
•
Thermal storage
•
Unvented systems
When installing this mixer with a combination or
multi-point boiler, it may be necessary to install
flow regulation.
Check that the appliance is capable of delivering
hot water at a minimum switch-on flow rate
of 3 litres per minute. At flow rates between 3
and 8 litres per minute, the appliance MUST be
capable of raising the water temperature to 52°C
minimum.
Water temperature at the inlet of the mixer valve
MUST remain relatively constant when flow rate
adjustments are made - refer to the appliance
operating manual to confirm compatibility with
this mixer shower.
Where thermal store systems and instantaneous
gas water heaters are used, if excessive draw-off
takes place the appliance may not be able to
maintain an adequate output temperature.
This could result in the shower temperature
becoming noticeably cooler.
Flow regulators can be fitted with high-pressure
water systems to reduce flow rate and assist
economy.
The hot supply temperature MUST remain a
minimum of 10°C hotter than the required blend
temperature for optimum performance.
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