28
It is the responsibility of the supervisor to make sure that:
1. An appropriate Risk Assessment is carried out is accordance with the local or
national regulations.
2. The water temperature is raised to and held at the required level at all parts of
the circuit for the required duration as stated in the Risk Assessment.
3. All outlets are ushed for the correct amount of time if required by the Risk
Assessment.
4. Appropriate measures are taken to make sure that none of the outlets are used
while the water is at an unsafe temperature.
5. Once thermal disinfection is complete, the supervisor should return the DRV40 to
its normal operating mode using the 'Cool Down' button within the 'Disinfection'
screen. This will switch the DRV40 to its full cold position and allow the blend
circuit to be reduced gradually to a safe temperature level*. Make sure the blend
circuit temperature returns to normal operation within the 'Disinfection Timeout'
period (see 'Disinfection Cycle').
6. The Disinfection cycle is monitored constantly and the supervisor is able to stop
the cycle using the 'Abort' button in the 'Disinfection' screen.
*Without a draw off, the water in the blend circuit will remain hot for a long time.
In order to speed up the temperature reduction, a draw-off must be made during
'Cool Down' using the last outlet of the blend circuit, or a dump valve tted near to
the end of the blend circuit. Check with local water authorities with regard to water
temperature limitations to drain.
Failure to complete a sufcient cool down of the blend circuit may result in a 'Temp
High' alert or an 'Error Temp' shut down to full cold (see 'Alert Messages' and
'Fault Diagnosis - DRV40 Display Errors').
To Next Page
Loading...
Need help?
General
