Symptom: The Pressure Relief Valve Opens; Symptom: The Water Pressure Relief Valve Leaks - Daikin Altherma R Hybrid Installer's Reference Manual

13.3.5 Symptom: The pressure relief valve opens

13.3.6 Symptom: The water pressure relief valve leaks

CHYHBH05+08AF + EHYKOMB33A
Daikin Altherma R Hybrid
4P471761-1E – 2020.10
Possible causes
The water pressure at the pump inlet is
too low
Possible causes
The expansion vessel is broken
The water volume in the installation is
too high
The water circuit head is too high
Possible causes
Dirt is blocking the water pressure relief
valve outlet
13 Troubleshooting
|
Corrective action
Check and make sure that:
▪ The water pressure is >1 bar.
▪ The pressure sensor of the gas boiler
is not broken.
▪ The expansion vessel is NOT broken.
▪ The pre-pressure setting of the
expansion vessel is correct (see
"6.4.4 Changing the pre-pressure of
the expansion vessel" [
Corrective action
Replace the expansion vessel.
Make sure that the water volume in the
installation is below the maximum
allowed value (see "6.4.3 To check the
water volume and flow
"6.4.4 Changing the pre-pressure of the
4
expansion vessel" [ 46]).
The water circuit head is the difference
in height between the indoor unit and
the highest point of the water circuit. If
the indoor unit is located at the highest
point of the installation, the installation
height is considered 0 m. The maximum
water circuit head is 7 m.
Check the installation requirements.
Corrective action
Check whether the pressure relief valve
works correctly by turning the red knob
on the valve counterclockwise:
▪ If you do NOT hear a clacking sound,
contact your dealer.
▪ If the water keeps running out of the
unit, close both the water inlet and
outlet shut-off valves first and then
contact your dealer.
4
46]).
4
rate" [ 44] and
Installer reference guide
177