In Service Testing
cont.
Annex F of D 08 (informative)
Annex F of D 08 (informative)
Annex F of D 08 (informative)
Annex F of D 08 (informative)
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 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:
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.
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 to 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
on 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.
21
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