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For healthcare applications where a Type 3 valve is required, the supply conditions
must comply with the values in the following table. Note that both supply pressures
must lie within the same pressure range.
Installation Conditions
Operating Pressure Range
High Pressure
Low Pressure
Maximum Static Pressure - bar
Maintained Pressure, Hot and Cold - bar
Hot Supply Temperature -
o
C
Cold Supply Temperature -
o
C
10
5 to 20
52 to 65
1 to 5
10
0.2 to 1
52 to 65
5 to 20
(Temperatures should always be recorded with a thermometer with proven
accuracy)
1.
Check that the designation of the thermostatic mixing valve matches the intended
application.
In order to achieve the safe water temperatures expected of a Type 3 valve it is
essential that the valve is used only for the applications covered by its approved
designations, with the appropriate water supply pressures and temperatures, and it is
commissioned, maintained and serviced in accordance with the recommendations
contained in this guide.
Commissioning
2.
Check that the supply pressures are within the range of operating pressures for
the designation of the valve.
3.
Check that the supply temperatures are within the range permitted for the valve
and by guidance information on the prevention of legionella etc.
4.
Check inlet pipework temperatures for correct function of checkvalve.
5.
All connections and mixer body are water tight.
6.
Operate the outlet flow control and check:
(a) Flow rate is sufficient for purpose.
(b) Temperature(s) obtained are acceptable.
7.
Exercise the thermostat (refer to COMMISSIONING).
