Daikin Altherma 3 H F EAVH16SU18DA6V, Installer'S Reference Manual

Page: 182 / 228

11 | Maintenance and service
Installer reference guide
182
EPGA11~ EAV23DA6V
Daikin Altherma 3 H F
4P606487-1 – 2019.12
▪
Close the downstream isolating valve (field supply).
▪ Install an Allen key on the calibration screw in the centre of the plastic cover.
Rotate it clockwise to increase the outlet pressure and anticlockwise to
reduce it.
Check for correct operation of the temperature and pressure relief valve. Manually
operate the temperature and pressure relief valve to ensure free water flow
through discharge pipe. Turn knob left.
11.5 To drain the domestic hot water tank
DANGER: RISK OF BURNING
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. See "7.2.3 To open the indoor unit" [
4
67].
2 Remove the user interface panel. See "7.2.3 To open the indoor unit" [ 4 67].
3 Lower the switchbox. See "7.2.4 To lower the switch box on the indoor
unit" [
4
69].
4 Remove the tube from the temperature and pressure relief valve that is
located on top of the tank.
5 Remove the temperature and pressure relief valve from the tank.
6 Use a drain hose and a pump to drain the tank via the access point.