Mira Element SLT, Инструкция по установке и эксплуатации

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It is a requirement that all TMV2 approved
valves shall be verified against the original
set temperature results once a year. When
commissioning/testing is due the following
performance checks shall be carried out.
Measure the mixed water temperature at the
outlet.
Carry out the cold water supply isolation test by
isolating the cold water to the TMV, wait for five
seconds if water is still flowing check that the
temperature is below 46°C.
If there is no significant change to the set outlet
temperature (±2°C or less change from the
original settings) and the fail-safe shut off is
functioning, then the valve is working correctly
and no further service work is required.
Notes! If there is a residual flow during the
commissioning of the valve or the annual
verification (cold water supply isolation test), then
this is acceptable providing the temperature of
the water seeping from the valve is no more than
2°C above the designated maximum mixed water
outlet temperature setting of the valve.
Temperature readings should be taken at the
normal flow rate after allowing for the system to
stabilise.
The sensing part of the thermometer probe
must be fully submerged in the water that is to
be tested.
Any TMV that has been adjusted or serviced must
be re-commissioned and re-tested in accordance
with the instructions given in this guide.
The installation of thermostatic mixing valves must
comply with the requirements of the Water Supply
(Water Fittings) Regulations 1999.
FAULT DIAGNOSIS
If you require a Mira trained service engineer or
agent, refer to section: ‘Customer Services’ .
Fault Diagnosis
Symptom:
• Only hot or cold water from the mixer outlet.
• Outlet temperature too hot / too cold.
Cause / Rectification:
• Inlets reversed (hot supply to cold supply).
• No hot water reaching mixer.
• Check the filters for any blockage.
• Installation conditions outside operating
parameters, refer to sections: ‘Specifications’
and ‘Commissioning’ .
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Symptom:
• Fluctuating or reduced flow rate.
Cause / Rectification:
• Check the showerhead, hose and filters for
any blockage and clean.
• Make sure that the maintained inlet pressures
are nominally balanced and sufficient, refer to
section: ‘Specifications’ .
• Make sure that the inlet temperature
differentials are sufficient, refer to section:
‘Specifications’ .
• Flow regulator fitted incorrectly.
• Air lock or partial blockage in the pipework.
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Symptom:
• Water leaking from showerhead.
Cause / Rectification:
• Normal for a short period after shut off.
• Check that the pressures are not in excess of
the specifications for the product.
• Renew the thermostatic cartridge.