Hitachi P-N23NA2 Service Manual

2 Unit installation
DX-Interface
SMGB0099 rev.0 - 12/2016
75
2
2.12 DX-Interface
2.12.1 Accessories supplied with the unit
Check that the following accessories are supplied with the unit.
? NOTE
Please contact your HITACHI distributor if any of the accessories has not been supplied with the unit.
Accessory Appearance Qty Purpose
Control box 1 System control box
Expansion valve box 1
Expansion valve for refrigerant cycle
control
Thermistor 4
Temperature sensing:
inlet air (blue)
outlet air (red)
gas line (yellow)
liquid line (black)
Thermistor extension
(5 m)
4
To extend thermistor length:
Inlet air (blue)
outlet air (red)
gas line (yellow)
liquid line (black)
Installation Manual and Declaration of
conformity
1 Instructions and important notice
Control box xing accessory 4 Control box cover lock
Harness jumper 1 Motor alarm connection jumper
2.12.2 Unit installation
• The installation of a specic remote controller is necessary during the installation commissioning. Once the
installation commissioning is nished, 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 lter when noise is emitted from power supply.
• Do not install the DX-Interface where generation, owing, staying or leakage of ammable 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.

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.

Hitachi P-N23NA2 Specifications

General

Brand	Hitachi
Model	P-N23NA2
Category	Air Conditioner
Language	English