Indoor Fan Performance - Technibel DSAF97R5IAA Technical Data & Service Manual

1-4 Indoor Fan Performance

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 the screw on the electrical component box
and remove the cover plate.
(2) Disconnect the fan motor sockets in the box.
(3) Replace the adapter cable with the booster cable
(sockets at both ends).
(4) Securely connect the booster cable sockets
between the disconnected fan motor sockets in step 2
as shown in the Figure.
(5) Place the cable neatly in the box and reinstall the cover plate.
DSAF97R5I - DSAF127R5I
10
8
6
4
M
L
2
0
200 400 600
DSAF187R5I
10
8
6
H
4
M
L
2
0
300 500 700 900
HH
H
800 1000
3
m /h
HH
1100 1300 1500
Fan motor
Connector motor cable (at the supply)
NOTE HH: Using the booster cable
H: At shipment
How to read the diagram
The vertical axis is the external static pressure (mm W.G.) while
the horizontal axis represents the AIR FLOW (m
The characteristic curves for "HH", "H", "M" and "L"
fan speed control are shown.
The nameplate values are shown based on the "H" air flow rate.
For the type 9/12000 the flow rate is 620 m
static pressure is 5 mm W.G. at H position;
For the type 18000 the flow rate is 865 m
static pressure is 5 mm W.G. at H position;
for the type 24000 the flow rate is 985 m
static pressure is 5 mm W.G. at H position.
DSAF247R5I
10
8
6
M
4
L
2
0
300 500 700 900
11
Booster cable
(M - H - HH)
3
/h while the external
3
/h while the external
3
/h while the external
HH
H
1100 1300 1500
Adapter cable
(L - M - H)
3
/h).