17
COMMISSIONING
Commissioning must be carried out in accordance with these instructions, and must
be conducted by designated, qualified and competent personnel.
Exercising the Thermostat
Thermostatic mixing valves with wax thermostats are inclined to lose their
responsiveness if not used. Valves which have been in storage, installed but not
commissioned, or simply not used for some time should be exercised before setting
the maximum temperature or carrying out any tests.
Note!
Make sure that the hot and cold water supplies are available at the inlets.
1.
Move the tap control lever rapidly from cold to hot and hot back to cold several
times, pausing at each extreme.
2.
Operate the tap control and check:
a.
Flow rate is sufficient for the purpose
b.
Temperature(s) obtainable are acceptable.
3.
Adjust the temperature of the mixed water in accordance with the instructions
(refer to the section: '
Commissioning: Maximum Temperature Setting'
).
For Type 3 valves refer to the table in the
TMV3 Requirements Manual.
It is advisable to establish a performance check at this time, which should be noted
for future reference as part of a Planned Maintenance Programme. The procedure
should be chosen to imitate both typical and difficult operating conditions, such as
any supply pressure fluctuations that may be likely. An ideal method is to locate
another outlet on the common cold water supply close to the mixing valve (operating
this outlet should cause a drop in supply pressure), and note the subsequent effect
on blend temperature (should be no more than a 2°
C change).
Maximum Temperature Setting
Before using the thermostatic control the maximum temperature must be checked
to make sure that it is at a safe level. It has been preset to approximately 41°C at
the factory but due to variations in site conditions the maximum temperature may
need adjustment.
Note!
Make sure that the hot water temperature is at least 55°C and that there is
sufficient supply.
1.
Turn the tap to the maximum temperature and maximum flow setting (i.e. fully
anticlockwise) and allow the temperature to stabilise.
If the temperature is too hot or too cold adjust as follows:
Summary of Contents for Safetherm
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