Inta HTMWMBCP Installation And Maintenance Instructions Manual page 20

Commissioning
6. Ensure that the application, to which the valve will be used, is appropriate for the approved
designation.
7. The above information must be recorded and updated on every occasion when any work is
carried out on the valve.
In Service Testing
To ensure that the Thermostatic Mixer maintains a high level of protection, we advise the following in
service testing is followed (the same equipment used to commission the valve initially must be used in
the following tasks).
1. After a period of between 6 and 8 weeks after commissioning carry out the following.
a) Record the temperature of the hot and cold water supplies.
b) Record the temperature of the mixed water at the largest draw off flow rate.
c) Record the temperature of the mixed water at the smallest draw off flow rate.
2. If the mixed water temperature has changed significantly from the previous test results
(e.g. > 1 k), record the change and before re-setting the mixed water temperature check that:
a) All the strainers are clean
b) All the check valves are in good working order
c) The isolation valves are fully open.
3. If the mixed water temperature is acceptable, carry out the following:
a) Record the temperature of the hot and cold water supplies.
b) Record the temperature of the mixed water at the largest draw off flow rate.
c) Record the temperature of the mixed water at the smallest draw off flow rate.
d) Isolate the cold water supply to the mixing valve and monitor the mixed water
temperature.
e) Record the maximum temperature achieved as a result and the final temperature (the
final temperature should not exceed the values quoted in table 2)
f) Record the equipment used during these tests.
4. If during the test, paragraph 3, the mixed water temperature is greater than the values quoted
in table 2 or the maximum temperature exceeds the corresponding values from previous test
results by more than 2˚C, the tap must be serviced.
5. After a period of between 12 and 15 weeks after commissioning, carry out the sequence of
tests as described in 1, 2, 3 and 4 of this section.
© Intatec Ltd 2016 19