6
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.
Installation Conditions
For healthcare applications where a Type or 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.
Operating Pressure
Range
High Pressure
Low Pressure
Maximum Static
Pressure - bar
0
0
Maintained Pressure,
Hot and Cold - bar
to 5
0. to
Hot Supply
Temperature - °C
5 to 65
5 to 65
Cold Supply
Temperature - °C
5 to 0
5 to 0
Valves operating outside these conditions cannot be guaranteed to operate as
Type or Type 3 Valves.
Commissioning
(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.
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 the 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 section:
'Commissioning', Exercising the
Thermostat’
).
