1-831-82
1-10. External Static Pressure Setting
Concealed Duct (Type F2)
For concealed duct type indoor units, the ventilating resistance so-called “external static pressure” becomes greatly
different depending on the connected duct length, shape, number of air outlet ports and types of filters.
When installing this unit, be sure to carry out the external static pressure setting in order to operate in the rated airflow
volume. Choose one of the following methods from “a”, “b”, “c” or “d” as shown in the flow chart (within the dotted lines)
and then make the setting accordingly.
a. No setting modification .............................................................................: Use-as-is at shipment (there are cases in which the
setting may differ from the shipment setting when
reset after once setting the external static pressure.)
b. Manual setting (set with the PC board) ....................................................: For high static pressure. Switching method with the
short-circuit connector.
c. Manual setting (set with the wired remote controller) ...............................: Low static pressure ~ high static pressure
d. Auto airflow volume setting (set on the wired remote controller) .............: Air outlet volume is automatically adjusted to the rated
airflow volume with the auto airflow control drive.
Flow of External Static Pressure
Finish the ducting and electrical wiring and prepare it for use. (Note (1))
External static pressure should be set during initial operations after installation (before
the cooling and heating test run).
When operating with group control (connecting multiple indoor units with one wired
remote controller), make the concealed duct type to the main unit.
Start external static pressure setting
a. No setting modification
b. Manual setting
(set with the PC board)
TP3 or TP1 short-circuit
Refer to section “1-10-1.
How to Set on PC Board”.
c. Manual setting
Item code “b0” : 0~15 setting
(*Note (3)) (* Note (4))
Refer to section 1-10-2 or 1-10-3.
d. Auto airflow volume setting
(* Note (4)) Item code “b0” :
-2 setting
Refer to section 1-10-2 or 1-10-3.
Operation checks for external static pressure settings (*Note (2))
Refer to section 1-10-2 or 1-10-3.
Check if the setting is within the range of use on the PQ diagram.
If out of range, adjust until it becomes within the range of use.
This can be omitted if deemed unnecessary in the event of the same installation/set-up being available.
Auto airflow volume control
operations (*Note (5))
Refer to section 1-10-2 or 1-10-3.
Test operation display will disappear. (*Note (6))
External static pressure setting completed
Timer remote controller available
Lines
15
and
14
settings (high static pressure) on
the PQ diagram required
Set the rated airflow
volume with the exception of lines
15
,
14
and,
8
Line
8
(set at
shipment) on the PQ diagram
designed and installed
No
No
No
No
Ye s
Ye s
Ye
es
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SM830203-04.indb 83 15/10/16 10:44:45
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