Refer to Ä Chapter 9.2 “Changing/draining heat transfer liquid”
on page 128 for detailed information on draining the heat transfer
liquid.
9.2 Changing/draining heat transfer liquid
WARNING!
Contact with hot or cold heat transfer liquid
Scalding, cold burns
Bring the heat transfer liquid to room temperature before
draining.
WARNING!
Splashing heat transfer liquid
Eye damage
Always wear suitable safety glasses when working on the
device.
Observe the regulations for the disposal of used heat transfer liquid.
1. Allow the device and heat transfer liquid to cool or warm up to room
temperature.
2. Turn o the device and pull out the mains plug.
3. Attach a hose to the drain nozzle.
4. Place the hose in a suitable container to collect the heat transfer
liquid.
It may be necessary to drain the device several times if the
filling volume is high.
5. Open the drain tap by turning it counterclockwise.
Drain the bath, external consuming unit, accessories and
hoses completely.
6. If necessary, clean or flush out the device (with new heat transfer
liquid, for example).
After changing to a dierent heat transfer liquid, you may have to
set new values for the temperature limit, overtemperature switch-o
point and/or the controller output limit.
Fig. 76: Attaching hose
V6PRO bath thermostats and circulation thermostats128 / 156
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