1
1-306
HT :
H:
5
0
50
100
0
5
10
15150
10
(mmAq)
(Pa)
HT
H
M
L
20
0
50
0
5
10
15150
10
HT
H
L
100
M
(mmAq)
(Pa)
30 40
0
50
0
5
10
15
150
20
L
100
M
H
(mmAq)
(Pa)
HT
30
0
50
0
5
10
15
150
20
HT
L
100
M
H
(mmAq)
(Pa)
15
0
50
0
5
10
15150
10
HT
M
L
100
H
(mmAq)
(Pa)
SPW-UR124GH56 (A/B)
SPW-U125H (N)
SPW-UR164 / 184GH56 (A/B)
SPW-UR184SH56B
SPW-U165 / 185H (N)
SPW-U185SH (T)
SPW-UR484 / 604GH56 (A/B)
SPW-UR484 / 604SH56B
SPW-U485 / 605H (N)
SPW-U485 / 605SH (T)
SPW-UR364GH56 (A/B)
SPW-UR364SH56B
SPW-U365H (N)
SPW-U365SH (T)
SPW-UR254GH56 (A/B)
SPW-UR254SH56B
SPW-U255H (N)
SPW-U255SH (T)
1-9. Indoor Fan Performance
Booster Cable for Concealed-Duct Type
If external static pressure is too great (due to long
extension of ducts, for example), the air ow 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.
• How to Read the Diagram
The vertical axis is the external static pressure (Pa)
while the horizontal axis represents the air ow (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”
air ow. For the 25 type, the air ow 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 air ow
volume may drop too low at each air outlet.
Indoor Fan Performance
Fig.1-1
Fan
motor
Booster cable
Fan motor socket
(At shipment)
Electrical component box
Booster cable
(Booster cable installed)
External Static Pressure
Air ow (m
3
/minute)
limit line
limit line
Using the booster cable
At shipment
Fig.1-2
External Static Pressure
Air ow (m
3
/minute)
limit line
limit line
External Static Pressure
Air ow (m
3
/minute)
limit line
limit line
External Static Pressure
Air ow (m
3
/minute)
limit line
limit line
External Static Pressure
Air ow (m
3
/minute)
limit line
limit line
NOTE
SM830160-03ClassicPAC-iA4.ind306306SM830160-03ClassicPAC-iA4.ind306306 2010/02/1610:26:452010/02/1610:26:45