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7.2.2.
To install the bottom plate and connect safety valve
drain hose
1
3
7.2.3.
To fill the water circuit
1
Connect the water supply hose to the drain and fill valve.
2
Open the drain and fill valve.
3
Make sure that the automatic air purge valve is open (at least 2
turns).
4
Fill the circuit with water until the manometer indicates a
pressure of ±29 psi (2.0 bar).
5
Purge as much air as possible from the water circuit.
NOTE
Air in the water circuit can cause malfunctioning of the
flow switch. 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.
Pump only operation in order to purge the air of the
system is possible through field settings. Refer to field
settings of [E-04] in the chapter "[E] Service mode" on
page 21 for further details.
The unit might dispose some excessive water through
the pressure relief valve.
Water quality must be accordingly to local regulation
standards.
6
Close the drain and fill valve.
7
Disconnect the water supply hose from the drain and fill valve.
HXY48TAVJU
VRV System indoor unit
3P616151-1A – 2021.12
4x
2
NOTE
The water pressure needle on the manometer will vary
depending on the water temperature (higher pressure at
higher water temperature).
However, at all times water pressure shall remain above
14.5 psi (1 bar) to avoid air entering the circuit.
Installation and operation manual
13
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