Dx-Interface; Accessories Supplied With The Unit; Unit Installation - Hitachi RCI-1.0FSN4 Service Manual

2 Unit installation

DX-Interface

2.12 DX-Interface

2.12.1 Accessories supplied with the unit

Check that the following accessories are supplied with the unit.
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N O T E
Please contact your HITACHI distributor if any of the accessories has not been supplied with the unit.
Accessory
Control box
Expansion valve box
Thermistor
Thermistor extension
(5 m)
Installation Manual and Declaration of
conformity
Control box fixing accessory
Harness jumper
2.12.2 Unit installation
• The installation of a specific remote controller is necessary during the installation commissioning. Once the
installation commissioning is finished, this remote controller can be removed if the pin 7 is switched to ON position. In
this case, pay attention to all the setting details related with the remote controller because after remove it, they cannot
be changed.
• Do not install the DX-Interface where electromagnetic wave is directly radiated to the control box or expansion valve
box.
• Install a noise filter when noise is emitted from power supply.
• Do not install the DX-Interface where generation, flowing, staying or leakage of flammable gas may occur.
• When the false ceiling contains high humidity, dew condensation water may occur on the outer surface of the
expansion valve box. Therefore utilize the insulation on the outer surface of the expansion valve box.
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Installation location
1 Installation methods are selectable according to the dimension of the false ceiling.
2 Keep the distance between the unit or device with heat exchanger and the expansion valve box for the piping length
up to 5m. Also the elevation difference between the unit or device with heat exchanger and the expansion valve box
must be no more than 2m.
3 Check the ceiling slab is strong enough. If the ceiling slab is too weak to support the weight of the expansion valve
box, noise and vibration may occur.
75 SMGB0099 rev.0 - 12/2016
Appearance Qty
1
1
4
4
1
4
1
Purpose
System control box
Expansion valve for refrigerant cycle
control
Temperature sensing:
inlet air (blue)
outlet air (red)
gas line (yellow)
liquid line (black)
To extend thermistor length:
Inlet air (blue)
outlet air (red)
gas line (yellow)
liquid line (black)
Instructions and important notice
Control box cover lock
Motor alarm connection jumper
2