Daikin EHY2KOMB28AA — руководство по установке и подключению систем отопления [82/236]

Daikin EHY2KOMB28AA [82/236] To provide drainage for the pressure relief valve
9 | Installation
Installer reference guide
82
EJHA04AAV3 + EHY2KOMB28+32AA
Daikin Altherma H Hybrid
4P531180-1B – 2020.02
3 In case of connection with the optional domestic hot water tank, see the
installation manual of the domestic hot water tank.
NOTICE
In case of a third-party gas boiler: Install a manometer in the system.
NOTICE
Install air purge valves at all local high points.
NOTICE
In case an optional domestic hot water tank is installed: 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.
NOTICE
In case an optional domestic hot water tank is installed:
A drain device and pressure relief device must be installed on the cold water inlet
connection of the domestic hot water cylinder.
To avoid back siphonage, it is recommended to install a non-return valve on the
water inlet of the domestic hot water tank in accordance with the applicable
legislation.
It is recommended to install a pressure reducing valve on the cold water inlet in
accordance with the applicable legislation.
An expansion vessel should be installed on the cold water inlet in accordance
with the applicable legislation.
It is recommended to install the pressure relief valve on a higher position than
the top of the domestic hot water tank. Heating of the domestic hot water tank
causes water to expand and without pressure relief valve the water pressure
inside the tank can rise above the tank design pressure. Also the field installation
(piping, tapping points, etc.) connected to the tank is subjected to this high
pressure. To prevent this, a pressure relief valve needs to be installed. The
overpressure prevention depends on the correct operation of the field installed
pressure relief valve. If this is NOT working correctly, overpressure will deform
the tank and water leakage may occur. To confirm good operation, regular
maintenance is required.
To provide drainage for the pressure relief valve
NOTICE
If overpressure occurs, the system will release some of the liquid through the
pressure relief valve. The pressure relief valve of the outdoor unit is designed to
open at 3bar.
If glycol was added to the system, take adequate measures to safely recover it when
the pressure relief valve opens.
In any case, make sure that the flexible hose of the pressure relief valve is ALWAYS
free to release pressure.

Содержание

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