Increasing The Fan Speed; Indoor Fan Performance; How To Read The Diagram - Sanyo C4272R Service Manual

1-9 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 jumper cable (sockets at both ends) clamped
in the box.
(4) Securely connect the jumper cable sockets
between the disconnected fan motor sockets in step 2.
(5) Place the cable neatly in the box and reinstall the cover
plate.

Indoor Fan Performance

26 Type
1
150
2
100
50
H
3
L
0
300 500
Air Flow (CFM)
NOTE HT : Using the booster cable
H : At shipment
4

How to read the diagram

The vertical axis is the external static pressure (Pa) while the horizontal axis represents the AIR FLOW (CFM).
The characteristic curves for "HT", "H", "M" and "L" fan speed control are shown.
The nameplate values are shown based on the "H" air flow. For the 26 type, the air flow is 636 CFM, while the
external static pressure is 49 Pa at "H" position. If external static pressure is too great (due to long extension of
5
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.
6
200
150
0.5
0.4 100
0.3
HT
0.2 50
HH
0.1
0 0
700 900 500
1982_U_I
Jumper cable
Fan
motor
Fan motor socket
(At shipment)
36 Type
0.8
0.6
0.5
0.4
0.3
HT
0.2
HH
0.1
H
L
0
1000
Air Flow (CFM)
1983_U_I
I-82
1. Specifications
Electrical component box
Jumper cable
(Jumper cable installed)
SM831148
2159_M_I