Daikin Altherma 3 GEO Series Installer's Reference Manual page 212

13 | Maintenance and service
Installer reference guide
212
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.
Pressure reducing valve
Depending on local water conditions, annual inspection of the integral line strainer,
pressure reducing valve cartridge and seating may be necessary.
a Cartridge
b Strainer
c Calibration screw
1 Unscrew the plastic cover of the pressure reducing valve.
2 Extract the cartridge with the aid of long nosed pliers to grip the head of the
set screw.
3 Remove the strainer element.
4 Clean the strainer element and cartridge under clean running water.
5 Replace if the strainer or cartridge are damaged.
6 Refit the strainer, cartridge and cover.
7 If the cartridge has been replaced, calibrate the pressure reducing valve:
▪ 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.
Chemical disinfection
If the applicable legislation requires a chemical disinfection in specific situations,
involving the domestic hot water tank, please be aware that the domestic hot
water tank is a stainless steel cylinder containing an aluminium anode. We
recommend to use a non-chloride based disinfectant approved for use with water
intended for human consumption.
NOTICE
When using means for descaling or chemical disinfection, it must be ensured that the
water quality remains compliant with EU directive 98/83 EC.
c
a
b
EGSAH/X06+10UDA9W
Daikin Altherma 3 GEO
4P598592-1A – 2019.12