Thermostatic bar mixer shower
16
FREQUENCY OF IN-SERVICE TESTS
General
In the absence of any other instruction or
guidance on the means of determining the
appropriate frequency of in-service testing, the
following procedure may be used:
a) 6 to 8 weeks after commissioning carry out
the tests detailed in:
In-Service Tests
b) 12 to 15 weeks after commissioning carry
out the tests detailed in:
In-Service Tests
Depending on the results of the above tests,
several possibilities exist:
a) If no significant changes (e.g. ≤ 1 K) in
mixed water temperatures are recorded
between commissioning and 6 to 8 week
testing, or between commissioning and
12-15 week testing the next in-service test
can be deferred to 24 to 28 weeks after
commissioning.
b) If small changes (e.g. 1 to 2 K) in mixed
water temperatures are recorded in only one
of these periods, necessitating adjustment of
the mixed water temperature, then the next
in-service test can be deferred to 24 to 28
weeks after commissioning.
c) If small changes (e.g. 1 to 2 K) in mixed
water temperatures are recorded in both of
these periods, necessitating adjustment of
the mixed water temperature, then the next
in-service test should be carried out at 18 to
21 weeks after commissioning.
d) If significant changes (e.g. > 2 K) in mixed
water temperatures are recorded in either
of these periods, necessitating service work,
then the next in-service test should be carried
out at 18 to 21 weeks after commissioning.
The general principle to be observed after the
first 2 or 3 in-service tests is that the intervals of
future tests should be set to those which previous
tests have shown can be achieved with no more
than a small change in mixed water temperature.
NOTE:
A testing record page has been added to
the book for your use.
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