2 Unit installation
Fan performance curves
SMGB0091 rev.2 - 11/2015
26
RASC-10HNPE
?
N O T E
• When designing a duct, check to ensure that the Air volume
is within working range as indicated in the fan performance
curves.
• If the Air volume is set outside working range, water carry-
over (drop in the ceiling or into the room), noise increase,
damage to fan motor (high temperature) or insufficient
Cooling/Heating capacity phenomena can occur.
External Static Pressure (Pa)
0
10
20
30
40
50
60
70
80
90
100
110
120
130
100
105
110
115
120
125
130
135
140
Air flow (m³/min)
Setting of the fan performance curves
In some installations, it may be necessary to adjust the fan operation settings of RASC‑(6/8/10)NPE units in order to
achieve an optimal performance of the fan unit. The correct static pressure setting (Low / Medium / High) has to be
selected using the PSW and 7-segment display on the RASC PCB, according to the pressure values below:
• RASC-(4/5)HP: No setting is required.
• RASC-(6/8)HP: Select the “Medium pressure setting (
f2:1
)” for external static pressures higher than 50 Pa.
• RASC-10HP: Select the most suitable static pressure setting, depending on the installation conditions:
-
“Medium pressure setting (
f2:1
)”: For external static pressures between 50 and 80 Pa.
-
“High pressure setting (
f2:2
)”: For external static pressures higher than 80 Pa.
Default value: “Low pressure setting (
f2:0
)”
In order to do so, measure the fan motor current and set the static pressure setting according to the following table: For
the measurement of the fan motor current, please refer to the following drawing:
Model
Fan motor current (A)
Medium pressure setting
(
f2
:
0
1
)
High pressure setting
(
f2
:
0
2
)
RASC-6HP
< 1.40 A
-
RASC-8HP
< 3.10 A
-
RASC-10HP
2.65 ~ 3.10 A
< 2.65