Daikin Altherma 3 HT - To Drain the Domestic Hot Water Tank; About Cleaning the Water Filter in Case of Trouble; To Remove the Water Filter

13 | Maintenance and service
Installer reference guide
239
EPRA14~18D + ETVH/X16S18+23E
Daikin Altherma 3 H HT F
4P644737-1A – 2022.03
13.3 To drain the domestic hot water tank
DANGER: RISK OF BURNING/SCALDING
The water in the tank can be very hot.
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Close the cold water supply.
Prerequisite: Open all the hot water tapping points to allow air to enter the
system.
1 Remove the top panel, the user interface panel and the front panel.
2 Lower the switch box.
3 Remove the stop from the access point to the tank.
4 Use a drain hose and a pump to drain the tank via the access point.
a
a Access point to the tank
13.4 About cleaning the water filter in case of trouble
INFORMATION
For yearly maintenance, you do not have to remove the water filter from the unit to
clean it. But in case of trouble with the water filter, you might have to remove it so
that you can thoroughly clean it. Then you need to do as follows:
▪ "13.4.1To remove the water filter"[4239]
▪ "13.4.2To clean the water filter in case of trouble"[4240]
▪ "13.4.3To install the water filter"[4241]
13.4.1 To remove the water filter
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
1 The water filter is located behind the switch box. To get access to it, see:
▪ "7.2.6To open the indoor unit"[469]
▪ "7.2.7To lower the switch box on the indoor unit"[471]
2 Close the stop valves of the water circuit.
3 Close the valve (if equipped) of the water circuit towards the expansion vessel.
4 Remove the cap on the bottom of the magnetic filter/dirt separator.
5 Connect a drain hose to the bottom of the water filter.