10 Maintenance and service
Installation manual
42
EWSAH/X06UD
Daikin Altherma 3 WS
4P675760-1C – 2023.02
10.3
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.
Prerequisite:
Remove the top panel. See
6].
1
Remove the tube from the temperature and pressure relief
valve that is located on top of the tank.
2
Remove the temperature and pressure relief valve from the
tank.
3
Use a drain hose and a pump to drain the tank via the access
point.
2
1
4
Tightening torques for installation:
Item
Tightening torque
Tube connection
30 N•m
Temperature and pressure relief valve
40 N•m
10.4
To inspect the inside of 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.
Prerequisite:
Remove the top panel. See
6].
1
Remove the clip that fixes the domestic hot water OUT pipe.
2
Disconnect the pipe such that the tank is accessible for visual
inspection (e.g. with an endoscope).
1
3
2
3
Reconnect the pipe to the tank.
4
Reinstall the clip to fix the domestic hot water OUT pipe.
