Hitachi SET FREE Serie Manual De Instrucciones página 27

PIPING WORK AND REFRIGERANT CHARGE
Precautions for the installation of the outdoor unit
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Order of installation of the units
The outdoor units must be installed in decreasing order of
capacity: Capacity of unit A ≥ capacity of unit B ≥ capacity of unit
C.
Unit -A-, with the highest capacity, must be closest the indoor
units.
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Refrigerant pipe installation between outdoor
units
1 The length between the connection kit -K- (on the side of the
outdoor unit) and the outside unit, must be
L ≤ L ≤ L ≤ L ≤ 10 m.
A B C D
• For FSXN1E and FSXNHE
• For FSXN1E only
2 Place the connection kit at a lower level with respect to the
connection of the refrigerant pipes of the outdoor unit.
If the connection kit is placed above the refrigerant pipe
connection of the outdoor unit, keep a maximum of 300 mm
between the connection kit and the base of the outdoor
unit. In addition, an oil recovery unit -A- (minimum 200 mm)
should be fitted between the connection kit and the outdoor
unit.
17 PMML0392B rev.1 - 07/2016
≤100
≥500
3 If the length of the refrigerant gas and liquid pipes between
outdoor units is greater than two metres, the oil recovery unit
should be fitted on the gas pipe to prevent the build-up of
refrigerant oil.
4 Place the refrigerant pipes of the outdoor units horizontally,
or slightly tilted towards the side of the indoor units to
prevent the build-up of refrigerant oil at the lowest point -A-.
A
5 If the refrigerant pipes are opposite the outdoor unit, there
should be a minimum of 500 mm between the outdoor units
and the connection kits -B- for maintenance operations.
B
?
N O T E
The 500 mm space is required when replacing the unit compressor.
6 Install the connection kits parallel to the floor (± 15°).
± 15º
A