Hitachi RPI-5.0FSN4E - Page 90

2 Unit installation
78
SMGB0077 rev.0 - 01/2013
View from P
Electrical Box
840
664
P
210 118
φ
145
124
Min.10a
b
840
Indoor Unit
Air Flow
Fresh Air
(Total Heat
Exchanger)
Flexible Duct (
φ
150)
(Field-Supplied)
Fresh Air Intake Kit
Suspension Band
(Field-Supplied)
Indoor Unit
Air Flow
Fresh Air
(Total Heat
Exchanger)
Dimension
Model a b
1.0 - 2.5 303 179
3.0 - 6.0 353 229
The outdoor air inlet duct resistance increases as indicated in the following gure when using the T-duct connection. Use
it as a guide for fan selection.
0 2 4 6
Air Flow Volume (m
3
/min.)
Pass Resistance (Pa)
Pass Resistance of Fresh Air Intake Portion
6HP
Limit of Fresh
Air Intake Amount
50
100
150
200
0
NOTE:
This chart is shown the relationship between
the air flow volume and the pass resistance when
the T-tube connecting kit is used with
the fresh air intake kit.