24
25
In-Service Testing
cont.
Commissioning and In-Service Tests
D.3.1.1
6 to 8 weeks after commissioning, conduct the tests
given in D.2.2.
D.3.1.2 12 to 15 weeks after commissioning, conduct the
tests in D.2.2.
D.3.1.3 Depending on the results of D.3.1.1 and D.3.1.2
several possibilities exist:
a) If no significant changes (e.g.
≤
1 K ) in outlet water
temperatures are recorded between commissioning and
D.3.1.1, or between commissioning and D.3.1.2 the nest
in-service test can be deferred to 24 to 28 weeks after
commissioning;
b) if small changes (e.g. 1 to 2 K) in outlet water
temperatures are recorded in only one of these periods,
necessitating adjustment of the outlet 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 outlet water
temperatures are recorded in both of these periods,
necessitating adjustment of the outlet 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. > 2K) in outlet 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
or earlier.
D.3.1.4 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 outlet water
temperature.
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