Sanyo Big PACi 18 Series - Indoor Fan Performance

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1-102
1-9. Indoor Fan Performance
If external static pressure is too great (due to long
extension of ducts, for example), the airflow volume
may drop too low at each air outlet. This problem
may be solved by increasing the fan speed using the
following procedure:
(1) Remove 4 screws on the electrical component box
and remove the cover plate.
(2) Disconnect the fan motor sockets in the box.
(3) Take out the booster cable (sockets at both ends)
clamped in the box.
(4) Securely connect the booster cable sockets
between the disconnected fan motor sockets in
step 2 as shown in Fig. 1-1.
(5) Place the cable neatly in the box and reinstall the
cover plate.
Booster cable
Booster cable
Electrical component box
(At shipment) (Booster cable installed)
Fan motor socket
Fan
motor
HT : Using the booster cable
H : At shipment
20
Airflow (m
3
/minute)
External Static Pressure
0
50
0
5
10
15150
10
Limit line
Limit line
HT
H
L
100
M
(mmAq)
(Pa)
30 40
Airflow (m
3
/minute)
External Static Pressure
0
50
0
5
10
15
150
20
Limit line
Limit line
L
100
M
H
(mmAq)
(Pa)
HT
30
Airflow (m
3
/minute)
External Static Pressure
0
50
0
5
10
15
150
20
Limit line
HT
L
100
M
H
Limit line
(mmAq)
(Pa)
15
Airflow (m
3
/minute)
External Static Pressure
0
50
0
5
10
15150
10
Limit line
Limit line
HT
M
L
100
H
(mmAq)
(Pa)
SPW-UR184GH56 (A/B)
SPW-UR184SH56B
SPW-U185H
SPW-U185SHT
Indoor Fan Performance
SPW-UR484GH56 (A/B)
SPW-UR484SH56B
SPW-U485H
SPW-U485SHT
SPW-UR364GH56 (A/B)
SPW-UR364SH56B
SPW-U365H
SPW-U365SHT
SPW-UR254GH56 (A/B)
SPW-UR254SH56B
SPW-U255H
SPW-U255SHT
Fig. 1-1
Fig. 1-2
The vertical axis is the external static pressure (Pa)
while the horizontal axis represents the airflow
(m
3
/minute). The characteristic curves for “HT,” “H,”
“M” and “L” fan speed control are shown.
The nameplate values are shown based on the “H”
airflow. For the 25 type, the airflow is 18 m
3
/minute,
while the external static pressure is 49 Pa at “H”
position. If external static pressure is too great
(due to long extension of ducts, for example), the
airflow volume may drop too low at each air outlet.
How to Read the Diagram
Booster Cable for Concealed-Duct Type
NOTE
SM830161Book.indb102SM830161Book.indb102 2008/06/039:08:082008/06/039:08:08