Servicing the booster tank
It is essential to drain the booster tank when servicing the booster tank and
its valves. This is in order to prevent scalding, since the temperature of the
water in the booster tank is about 85 degrees Celsius (about 180 degrees F).
Booster tank with drain tap
The tank is drained via a drain tap on the back of the tank. Make sure that the tap is not
open before unscrewing the plug. If a nipple with G 1/4 male thread is used, together
withtheassociatedhose,thehosecanbettedtothedraintap.Thetankcannowbe
drained.
After draining, check that the drain tap is working properly. Seal the plug with PTFE
tapeandretit.
The microswitch must be checked as well, since it activates the booster tank. The
booster tank heating must never be on when the door(s) is/are down for loading/unload-
ing goods.
When servicing is complete, check the entire system for water leaks.
Theboostertankmustberelledbeforeaprocessisstarted.Todothis,opentheDW
valve via the control system. This is important, in order to avoid unwanted fault codes
when starting the machine.
Overheat protection
If the element overheats, the overheat cutout trips. If the overheat cutout has tripped it
must be replaced. The overheat cutouts are not resettable.
Plug
Drain valve
Level sensor
Microswitch
Steam trap
Steam valve
DW valve
Overheat protection
DW valve
Machine with
steam heating
V1756
V1757
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