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D.2.2 Procedure
D.2.3
Using the measuring equipment recorded in D.1.4 or equipment to the same specification
and with the appliance turned off check that:
a.
The water supply temperature is within the range 5 to 20°C;
b.
The terminal voltage at the appliance is within the range 230 ± 10%
D.2.4
If the set maximum outlet water temperature has changed significantly from the previous
test results (e.g. > 1°C), record the change and before re-setting the maximum outlet water
temperature check that:
a)
any outlet fittings are not blocked and are free of scale;
b)
any in-line or integral strainers are clean;
c)
any in-line or integral check valves or other backflow prevention devices are in good
working order;
d)
any isolating valves are fully open.
D.2.5
With an acceptable outlet water temperature, complete the following procedure:
a)
Record the supply voltage at the terminals of the appliance.
b)
Record the outlet water temperature and the flow rate resulting from the setting.
c)
Reduce the water supply flow rate at the inlet of the appliance by at least 50% or to the
lowest value at which the appliance continues to deliver an output of heated
water, whichever is the greater pressure.
d)
Record the outlet water temperature and the reduced flow rate.
NOTE: The outlet water temperature should not exceed 43°C for a shower and washbasin.
e)
Record details of the equipment, thermometers etc, used for the measurements.
D.2.6
If at step D.2.5 b) the outlet water temperature is greater than the values given in the note
to D.2.5 d) then service work is indicated.
D.3
Frequency of in-service tests
D.3.1
General
In-service tests should be carried out with a frequency which identifies a need for service
work before an unsafe water temperature can result. 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:
MAINTENANCE - BEAB CARE