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Armstrong International
221 Armstrong Blvd., Three Rivers, Michigan, 49093 - USA
Ph. (269) 279-3602 Toll Free (888) 468-4673 Fax (269) 279-3130
It is the responsibility of the supervisor to make sure that:
1. An appropriate Risk Assessment is carried out in 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 DRV80 to its normal operating mode
using the Cool Down button within the Disinfection screen. This will switch the DRV80 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 page 33).
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 o, the water in the blend circuit will remain hot for a long time. In order to speed up the temperature
reduction, a draw-o 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 sucient cool down of the blend circuit may result in a Temp High alert or an Error Temp
shut down to full cold (see Alerts on pages 27- 29).
Thermal Disinfection
IMPORTANT! PLEASE READ CAREFULLY
The thermal disinfection mode of the DRV80 is not an automated process. It is manually activated by the supervisor
to increase the temperature of the blend circuit to equal the temperature of the hot supply. The circuit pipework and
outlets can be thermally disinfected as part of a bacterial infection control regimen.
DO NOT USE THE THERMAL DISINFECTION FEATURE IF THE HOT WATER SUPPLY
CAN EXCEED 185°F (85°C)!
THE MAXIMUM TEMPERATURE FOR DISINFECTION SETPOINT MUST BE 185°F (85°C).
Disinfection
Warning! Thermal disinfection is a potentially hazardous process to raise the water
temperature to a level that will scald or even kill. It is therefore the responsibility of
the person supervising the process to make sure it is carried out correctly and safely.
ALL DRV80 DISPLAY ALERTS AND ERRORS ARE DISABLED DURING THE PROCESS!
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