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O & M MANUAL
DOLPHIN
ALAVO
7
F R E Q U E N C Y O F I N - S E RV I C E T E ST I N G
6 to 8 weeks after commissioning carry out the test sequence detailed above.
12 to 15 weeks after commissioning carry out the test sequence detailed above.
Depending on the results obtained, the following course of actions must be followed:
• If no significant changes (e.g.<1 °C) in mixed water temperature are recorded between
commissioning and testing at 6 to 8 weeks, or between commissioning and testing at 12 to 15
weeks, the next in-service test can be deferred to 24 to 28 weeks after commissioning.
• If small changes (e.g.1 to 2 °C) in mixed water temperature are recorded in only one of these
periods, necessitating adjustment of the mixed water temperature, then the next inservice test can
be deferred to 24 to 28 weeks after commissioning.
• If small changes (e.g.1 to 2 °C) in mixed water temperature 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.
• If significant changes (e.g. >2 °C) in mixed water temperature are recorded in both 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 test 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.
It is recommended that In-Service Tests are carried out once every 6 months as a minimum.
a. Checking/adjusting/balancing the TMV3
• Recommended Code of Practice for Safe Water Temperatures (2).pdf
N OT E
If there is a residual flow during the commissioning or in service test during the cold water supply
isolation test then this is acceptable providing the temperature of the water seeping from the valve is
no more than 2°C above the designated maximum mixed water outlet temperature setting of the
valve as defined in Table 2.
Temperature readings should be taken at the normal flow rate after allowing the system to stabilise.
The sensing part of the thermometer probe must be fully submerged in the water that is to be tested.
Any TMV that has been adjusted or serviced must be re-commissioned and re-tested in accordance
with the manufacturer’s instructions.
A L AVO T H E R M O S TAT I C M I X I N G VA LV E
