Increasing The Fan Speed - Panasonic S-12MU1U6 Installation Instructions Manual

CAUTION
(4) When the check of drainage is complete, open the check pin (CHK) and
remount the insulator and drain cap onto the drain inspection port.

3-24. Increasing the Fan Speed

If external static pressure is too great (due to long extension of ducts, for
example), the air fl 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. 3-98.
(5) Place the cable neatly in the box and reinstall the
cover plate.
Booster cable
Fan
motor
Fan motor socket
(At shipment)
How to read the diagram
The vertical axis is the external static
pressure (in. WG) while the horizontal axis
represents the air fl ow (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 fl ow. For the 18 and 24 types, the
air fl ow is 635 CFM, while the external static
pressure is 0.20 in. WG at "H" position. If
external static pressure is too great (due to
long extension of ducts, for example), the air
fl ow volume may drop too low at each air
outlet. This problem may be solved by
increasing the fan speed as explained
above.
VRF_Indoor_US.indb 33 VRF_Indoor_US.indb 33
Be careful since the fan will start when you short
the pin on the indoor control board.
Electrical component box
Booster cable
(Booster cable installed)
Fig. 3-98
0.60
0.40
0.20
0
Air Flow Volume (CFM)
S-07MF1U6
S-09MF1U6
S-12MF1U6
0.60 0.60
0.40 0.40
HT
0.20 0.20
H
M
L
0 0
247 306
177 353
Air Flow (CFM)
S-48MF1U6
S-36MF1U6
0.60
HT
0.40
H
0.20
M
L L
0
742 918
883
706
706 1059
Air Flow Volume (CFM)
NOTE
HT : Using the booster cable
H : At shipment
33
Power supply outlet
Inter-unit control wiring
Fig. 3-97
S-18MF1U6
S-15MF1U6
S-24MF1U6
0.60
0.40
0.20
HT
H
M
M
L L
0
494 565
371
353
318 353 428 530
Air Flow (CFM) Air Flow Volume (CFM)
S-54MF1U6
0.60
0.40
HT
H
0.20
M M
L
0
1059 883 1059
706
1413
Air Flow Volume (CFM)
Fig. 3-99
HT
H
706
HT
H
1413
2011/09/30 12:23:08 2011/09/30 12:23:08