Installation manual

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Figure 27(b): DHW Test Failed
Figure 27(c): DHW Test completed
If the test fails, you will see the screen shown in figure 27(b), which provides information on why the test failed, and
advice on checks to carry out.
If the test is complete and has been successful, you will see the screen shown in figure 27(c), which shows the maxi-
mum temperature that the cylinder can achieve.
NOTE: S ELECTING ‘S TOP TEST ’ WILL CANCEL THE TEST COMPLETELY . I F
THE DHW TEST HAS BEEN CANCELLED RATHER THAN POSTPONED , THE
INFORMATION REGARDING THE IMMERSION DISPLAYED ON THE SET
TEMPERATURE MENU FOR DHW WILL NOT BE CORRECT ( THE IMMERSION
WILL NOT BE USED UNTIL THE MAXIMUM TEMPERATURE ACHIEVABLE BY THE
HEAT PUMP HAS BEEN REACHED ).
NOTE: D URING THE DHW TEST , THE DEFROST FUNCTION WILL BE
DISABLED . I F THE COIL STARTS FROSTING DUE TO EXTERNAL CONDITIONS , IT
IS POSSIBLE TO POSTPONE THE DHW TEST BY SELECTING ‘F INISH ’ ON THE
DHW TEST SCREEN ( SEE FIGURE 27( A )) WHILE THE TEST IS RUNNING . I F
THE TEST IS POSTPONED , THE DHW CAN STILL BE USED .
Figure 27(a): The test may be Postponed
using the “Finish” button
Figure 28: Disinfection Set-up
4.2.8 D ISINFECTION (T HERMAL )
Thermal disinfection is a function which keeps the level of legionella bacteria in
the cylinder under acceptable levels. This is carried out by heating the hot water
in the cylinder to a high temperature for a minimum set time.
The temperature and frequency of the disinfection cycle can be adjusted in this
menu. If the temperature is set to above what the heat pump can achieve, text
on the screen will appear which notifies that the immersion heater will be used
at the end of the cycle to top up to the required disinfection temperature.