Daikin Altherma 3 H F Installer's Reference Manual page 181

EPGA11~16DAV3 + EAVH16SU18+23DA6V
Daikin Altherma 3 H F
4P606487-1 – 2019.12
WARNING
If the internal wiring is damaged, it has to be replaced by the manufacturer, its
service agent or similarly qualified persons.
Descaling
Depending on water quality and set temperature, scale can deposit on the heat
exchanger inside the domestic hot water tank and can restrict heat transfer. For
this reason, descaling of the heat exchanger may be required at certain intervals.
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, it must be ensured that the
water quality remains compliant with EU directive 98/83 EC.
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:
11
c
a
b
Maintenance and service
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Installer reference guide
181