Stern Engineering PERFECT TIME SH Series Installation And Maintenance Manual page 13

24 HOURS DUTY FLUSH OPTION
24 HS ANTI-LEGIONELLA / ANTI FREEZE DUTY FLUSH CYCLE OPTION
This anti-Legionella / anti freeze feature provides an automatic duty flush cycle
for 30 seconds if the shower has not been used in the previous 24 hours.
This feature is optional and is ideal for buildings such as schools where the
shower installations are often vacant for long periods. The duty flush cycle
maximizes hygiene, and prevents frozen pipes during the cold Winter months.
In order to activate this option proceed as follows:
1) Disconnect the power supply (batteries or transformer).
2) To disconnect the power supply at battery models, open the piezo cup at the
shower control body using the provided 2.5 mm Allen key.
3) Wait ten seconds.
4) Reconnect the power supply.
5) The indicator light (LED) on the back of the piezo cap will start blinking. After
a few blinks the LED will give a steady red light. Touch the designated area at
the Piezo cap when the steady red light is still on to enter into adjusting mode.
When done correctly, the light will stop blinking.
Note: If you will not press at the indicated area, the previous settings will remain.
6) To enable the automatic duty flush option you need to arrive directly to the
adjustment level 4 (please see the adjustment levels table at page 9).
Once you have entered the adjusting mode following the steps 1 to 5, wait until
the LED blinks 2 times, then 3 times and 4 times. Immediately after the LED blinks
4 times touch the piezo cup once. This will enable the hygiene flush option.
To leave the adjusting mode wait until the LED blinks 5 times. Now this option
is activated. If the shower controls will not be used for 24 hours, a single 30
seconds hygiene flush will take place.
WARNING! A safe hot water temperature control is needed
This anti-Legionella / anti freeze feature is automatic and is intended to be used
with cold or premixed water only. A thermostatic mixing valve (TMV) must be
used to provide safe hot water temperatures and prevent scalding.
11