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10 Maintenance and service
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
unit" [ 4 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.
1
4 Tightening torques for installation:
Item
Tube connection
Temperature and pressure relief valve
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
unit" [ 4 6].
1 Remove the clip that fixes the domestic hot water OUT pipe.
Installation manual
42
"4.2.1 To open the indoor
2
Tightening torque
30 N•m
40 N•m
"4.2.1 To open the indoor
2 Disconnect the pipe such that the tank is accessible for visual
inspection (e.g. with an endoscope).
1
3 Reconnect the pipe to the tank.
4 Reinstall the clip to fix the domestic hot water OUT pipe.
2
3
EWSAH/X06UD
Daikin Altherma 3 WS
4P675760-1C – 2023.02
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