Installation Procedure; Refrigerant Piping Connection - Hitachi YUTAKI S80 Série Manuel D'utilisation

UNIT INSTALLATION
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Removing the electrical box cover
In order to access to the electrical components,
follow these steps:
1 Remove the indoor unit front cover.
2 Unscrew the 2 front screws and the 2 lower
screws which fixes the electrical box to the unit
structure.
6.3 INSTALLATION OF INDOOR UNIT
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N O T E
Please, try to perform all this procedure following all the steps in the exact order in which they are presented below.
The pictures shown correspond to the YUTAKI S80 TYPE 1, but the installation procedure is exactly the same for the TYPE 2.

Installation procedure

1 Space heating pipes connection
2 Drain pipes connection

3 Refrigerant piping connection

4 Power and transmission wiring connection
5 User controller wiring connection
6 Levelling procedure
7 Test and check
8 Cover's assembly
6.3.1 Space heating pipes connection
The unit is factory supplied with two shutdown valves which
have to be connected to the water inlet / outlet connections. With
these shut-off valves it is very practical to connect the indoor unit
to the heating system by using the factory supplied gaskets just
below the valves (G 1-1/4" connection). Then, the space heating
installation can be carried out.
Shut-off
valves
Gaskets
26 PMML0340B rev.1 - 03/2016
6.3.2 Drain pipes connection
For a correct drainage, connect the drain pipe for the safety
valve to the general draining system.
Drain pipe for
safety valve
Safety
valve
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N O T E
• The safety valve is activated when water pressure reaches 3 bars.
• Drain taps must be provided at all low points of the installation to
permit complete drainage of the circuit during servicing.
6.3.3 Refrigerant piping connection
Make the connection of refrigerant pipes respecting the
considerations indicated in the CD-ROM factory-supplied with
the unit. The refrigerant piping connections are flare nut.