Daikin Altherma 3 H HT EPRA16DAV3, Руководство по установке для специалистов

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7 | Piping installation
Installer reference guide
83
EPRA14~W1 + ETBH/9W
Daikin Altherma 3 H HT W
4P587501-1B – 2020.10
NOTICE
Overpressure bypass valve (delivered as accessory). We recommend to install the
overpressure bypass valve in the space heating water circuit.
▪
Mind the minimum water volume when choosing the installation location of the
overpressure bypass valve (at the indoor unit, or at the collector). See
"To check
the water volume and flow rate" [
4
78].
▪
Mind the minimum flow rate when adjusting the overpressure bypass valve
setting. See
"To check the water volume and flow rate" [
4
78] and "Minimum flow
rate" [
4
202].
NOTICE
Install air purge valves at all local high points.
NOTICE
A pressure relief valve (field supply) with an opening pressure of maximum 10 bar
(=1 MPa) must be installed on the domestic cold water inlet connection in
accordance with the applicable legislation.
7.2.4 To fill the water circuit
To fill the water circuit, use a field supply filling kit. Make sure you comply with the
applicable legislation.
NOTICE
Make sure both air purge valves (one on the magnetic filter and one on the backup
heater) are open.
All automatic air purge valves must remain open after commissioning.
7.2.5 To protect the water circuit against freezing
About freeze protection
Frost can damage the system. To prevent the hydraulic components from freezing,
the software is equipped with special frost protection functions, that include the
activation of pump in case of low temperatures:
▪ Water pipe freeze prevention (see "Water pipe freeze prevention" [
4
185]),
▪ Drain prevention. Only applicable when Bivalent is enabled ([C‑02]=1). This
function prevents the opening of freeze protection valves in the water piping to
the outdoor unit when the auxiliary boiler is running at negative outdoor
temperatures.
However, in case of a power failure, these functions cannot guarantee protection.
Do one of the following to protect the water circuit against freezing:
▪ Add glycol to the water. Glycol lowers the freezing point of the water.