Hitachi P-N23NA2 - Example Of Installation

2 Unit installation
Econofresh Kit
SMGB0099 rev.0 - 12/2016
74
2.11.4 Example of installation
1 Ducting Connection
Pre-drilled duct anges are provided at the supply, return and outdoor air intake connections. It is recommended that
a exible duct connection be installed to minimize sound and vibration transmission.
2 Insulation
All ducts should be insulated
- Especially the outdoor air duct, through which the cold outdoor air ows in, must be sufciently insulated.
- The lowest temperature of the entering outdoor air owing through the outdoor air duct is the lowest temperature
for heating operation at the installation site.
THM4
CN17
Supply Air Duct
RPI Unit
Econofresh
Outdoor Air Duct
(Fully Insulated)
(Field-Supplied)
Downward
Gradient of Duct
Outdoor
Thermistor
(Accessory)
Rain Hood with
Bird Screen
(Field-Supplied)
Pressure relief damper (eld supplied), connected
if necessary to the outside or to another place with
atmospheric pressure)
Return Air Filter
(Field-Supplied)
Return Air
Duct
Thermistor Cable
(Accessory)
AS Motor Cable
(Accessory)
Refrigerant
Piping
Insulate
(Field-Supplied)
5 mm
In the case that the unit is used under the following condition, perform additional insulation (*) or prepare a drain pan
underneath the unit.
? NOTE
Ducting arrangement must comply with local regulations.
30ºC
*20 mm
*10 mm
*5 mm
80%RH
70%RH
Saturation
Curve
Ambient Temperature around Unit
? NOTE
For further information regarding this product, refer to the installation and operation manual.