Specifications

ADPS
73
Fig. 3-122b
Fig. 3-122a
3-41. Increasing the Fan Speed (280 Type only)
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 fol-
lowing 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 2 booster cables from option carton box
(sockets at both ends).
(4) Securely connect the booster cable’s 2 sockets
between the disconnected fan motor sockets in
step 2 as shown in Fig. 3-122a.
(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
NOTE
HT : Using booster cable
H:
At shipment
60 70
Air Flow (m
3
/minute)
External Static Pressure
0
50
0
5
10
15
20
25
150
200
250
50
Limit line
Limit line
100
M
(mmAq)
(Pa)
H
H
L
M
70 80 90
Air Flow (m
3
/minute)
External Static Pressure
0
50
0
5
10
15
20
25
150
200
250
60
Limit line
Limit line
100
(mmAq)
(Pa)
H
HT
M
, H, HT
M
L
224 Type
280 Type
Indoor Fan Performance
04-396 InverterW_p51-108 ARGO 12/21/04 10:17 AM Page 73