Bristan DUL3 THBSM C Kurulum Talimatları Kılavuzu - Sayfa 11
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Commissioning
The first step in commissioning a
thermostatic mixing valve is to check the
following:
1. The designation of the thermostatic mixing
valve matches the application.
2. The supply pressures are within the valves
operating range.
3. The supply temperatures are within the
valves operating range.
4. Isolating valves (and strainers preferred)
are fitted.
If all these conditions are met, proceed to set
the temperature as stipulated in the setting
section.
The mixed water temperature at the
terminal fitting must never exceed 46ºC.
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 sup-
ply to the TMV, wait for five seconds, if
the water is still flowing check that the
temperature is below 46ºC.
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If there is no significant change to the set outlet
temperature (+/-)2ºC or less change from the
original setting) and the fail –safe shut off is
functioning, then the valve is working correctly
and no further service work is required.
Note: If there is a residual flow during the
commissioning 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
2ºC 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 in the setting
section.
The installation of thermostatic mixing valves
must comply with the requirements of the Water
Supply (Water Fittings) Regulations 1999.
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