Daikin Altherma EHYHBH05A Series, Installer'S Reference Manual

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8 | Piping installation
Installer reference guide
107
08CA + EHY EHYHBH/X08A + EHYKOMB33AA
Daikin Altherma hybrid heat pump
4P355634-1G – 2022.09
NOTICE
The water pressure indicated on the boiler display vary depending on the water
temperature (higher pressure at higher water temperature).
However, at all times water pressure shall remain above 1 bar to avoid air entering
the circuit.
NOTICE
▪
Air in the water circuit can cause malfunctioning. During filling, it may not be
possible to remove all the air from the circuit. Remaining air will be removed
through the automatic air purge valves during the initial operating hours of the
system. Additional filling with water afterwards may be required.
▪
To purge the system, use the special function as described in the chapter
"12 Commissioning" [
4
194]. This function should be used to purge the heat
exchanger coil of the domestic hot water tank.
8.6.6 To fill the domestic water circuit of the gas boiler
1 Open the main tap to pressurise the hot water section.
2 Vent the exchanger and the pipe system by opening a hot water tap.
3 Leave the tap open until all air has disappeared from the system.
4 Check all connections for leaks including internal connections.
8.6.7 To fill the domestic hot water tank
See the installation manual of the domestic hot water tank.
8.6.8 To insulate the water piping
The piping in the complete water circuit MUST be insulated to prevent
condensation during cooling operation and reduction of the heating and cooling
capacity.
If the temperature is higher than 30°C and the humidity is higher than RH 80%, the
thickness of the insulation materials should be at least 20 mm to prevent
condensation on the surface of the insulation.
When the drain pan is installed, make sure to insulate the water piping up to the
drain pan to avoid condensation.