Installation Of Indoor Unit; Installation Procedure; Refrigerant Piping Connection - Hitachi YUTAKI S Serie Manual De Instrucciones

UNIT INSTALLATION

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.

Installation procedure

1 Wall mounting procedure
2 Space heating pipes connection
3 Drain pipes connection

4 Refrigerant piping connection

6.3.1 Wall mounting procedure
1 Fix the wall support (factory-supplied accessory) to the wall
using appropriate plugs and screws. Make sure that the wall
support is completely levelled.
2 Hang the indoor unit on the wall support (at least two
persons are required in order to lift the unit because of its
weight).
3 Fix the indoor unit at the bottom side using the 4 screws
which had been previously removed during the unpacking
procedure.
22 PMML0336B rev.1 - 03/2016
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5 Power and transmission wiring connection
6 Cover assembly
7 Test and check
6.3.2 Space heating pipes connection
The unit is factory supplied with two shut-off 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" connection for 2.0-3.0HP; G 1-1/4"
connection for 4.0-10.0HP). Then, the space heating installation
can be carried out.
6.3.3 Drain pipes connection
For a correct drainage, connect the drain pipe for the safety
valve to the general draining system.
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6.3.4 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 except in case
of the gas connection of the 10.0 HP model, which is a brazed
connection.
Gaskets
Shut-off valves
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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.