I-99
SM830063
1
ECO MULTI SYSTEM Unit Specifications
7. Concealed Duct Type
■ How to read the diagram
The vertical axis is the external static pressure (mmAq) while the horizontal axis represents the AIR FLOW (m
3
/
minute). The characteristic curves for “HH,” “H,” “Med,” and “Low” fan speed control are shown.
The nameplate values are shown based on the “H” air flow. For the 25 type, the air flow is 21 m
3
/minute, while
the external static pressure is 5 mmAq at “H” position. If external static pressure is too great (due to long exten-
sion of duct, for example), the air flow volume may drop too low at each air outlet.
This problem may be solved by increasing the fan speed as explained above.
NOTE
HH : Using the booster cable
H : At shipment
Booster cable
Booster cable
Electrical component box
(At shipment) (Booster cable installed)
0491_M_I
Fan motor socket
Fan
motor
7-6. Increasing the Fan Speed
If external static pressure is too great (due to long
extension of ducts, for example), the air flow 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.
(5) Place the cable neatly in the box and reinstall the
cover plate.
External Static Pressure (mmAq)
Limit line
Limit line
HH
H
M
L
0788_U_I
Air Flow (m
3/
minute)
10
0
5
10
15
20
25
20 30
(Pa)
50
100
150
200
External Static Pressure (mmAq)
(Pa)
Limit line
Limit line
HH
H
M
L
0786_U_I
Air Flow (m
3
/minute)
5
0
5
50
100
150
10
15
20
10
External Static Pressure (mmAq)
Limit line
Limit line
HH
H
M
L
0789_U_I
Air Flow (m
3
/minute)
20
0
5
10
15
20
25
30 40
(Pa)
50
100
150
200
External Static Pressure (mmAq)
Limit line
Limit line
HH
H
M
L
0787_U_I
Air Flow (m
3
/minute)
10
0
5
10
15
20
15
(Pa)
50
100
150
36, 48 Type
9 Type
0724_U_I
510
0
5
10
15
External Static Pressure (mmAq)
50
100
(Pa)
H
L
Limit line
Limit line
HH
M
Air Flow (m
3
/minute)
25 Type 18 Type
12 Type
Indoor Fan Performance
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