Nuie VSQ2, Инструкция по эксплуатации

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21
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.