1-4 Indoor Fan Performance
If external static pressure is too great (due to long extension of ducts, foe 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 the screw 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 the Fig. 1-1
(5)
Place the cable neatly in the box and reinstall the cover plate.
Fig. 1-1
HH:
Using the booster cable
H:
At shipment
How to read the diagram
The vertical axis is the external static pressure (Pa) while the orizzontal one is the AIR FLOW RATE (m3/h).
The characteristic curves for HH, H, M and L fan speed are shown. The nameplate values shown are based on the
H air flow rate. For the type 7/9/12 flow rate is 600 m3/h while the external static pressure is 49 Pa at H position.
If external static pressure is too great (due, for example, to long duct extension), the air flow rate may drop too
much at each air outlet. This problem can be solved increasing the fan speed with the booster cable.
NOTE
12000
16/18000
EXT
ERNAL
ST
AT
IC
PRESSURE (mmW
.G
.)
m3/h
m3/h
EXT
ERNAL
ST
AT
IC
PRESSURE (mmW
.G
.)
9
Summary of Contents for 38.7130.072
Page 10: ...2 DIMENSIONAL DATA DSAFP125R5I 10...
Page 11: ...DSAFP165 185R5I 11...
Page 14: ...4 PROCESS AND FUNCTIONS 4 1 control functions 14...
Page 15: ...15...
Page 16: ...16...
Page 18: ...5 2 How to replace PCB 18...
Page 19: ...5 3 How to replace EEPROM with EEPROM included in PCB service pack 19...
Page 20: ...20...
Page 21: ...5 4 Table of settings 21...
Page 22: ...6 SERVICE PROCEDURE 6 1 Meaning of alarm message 22...
Page 23: ...6 2 Led indicator messages on outdoor control PCB 23...
Page 24: ...6 3 Symtoms and parts to inspect 24...
Page 25: ...6 4 Details of alarm messages resistance 25...
Page 26: ...26...
Page 27: ...27...
Page 28: ...28...
Page 29: ...7 OUTDOOR UNIT MAINTENANCE REMOTE CONTROL 29...
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