Daikin Altherma 3 H MT F Installer's Reference Manual page 241

EPRA08~12EAV3+W1 + ETVH12SU18+23EA6V
Daikin Altherma 3 H MT F
4P644482-1 – 2021.03
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. 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, make sure water quality
still complies with EU directive 2020/2184.
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.
Temperature and pressure relief valve
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.
13
c
a
b
Maintenance and service
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Installer reference guide
241