Sanyo DHX4852 - Manual (Page 163)

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4-49
W-2WAY ECO-i SYSTEM Unit Specifications
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4. Concealed Duct Type (U Type)
4-5. Increasing the Fan Speed
Fig. 4-1
Inter-unit control wiring
Power supply outlet
HT : Using the booster cable
H : At shipment
177
Air Flow (CFM) Air Flow (CFM)
Air Flow (CFM) Air Flow (CFM)
353
Limit line
Limit line
HT
H
M
L
706 353
HT
H
L
M
1059 706
HT
L
M
H
530 353
HT
M
L
H
18 Type 7, 12 Type
Indoor Fan Performance
24 Type
36 Type
NOTE
Exter
nal Static Pressure
0.20
0.40
0.60
(in.WG)
Exter
nal Static Pressure
(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. 4-2.
(5) Place the cable neatly in the box and reinstall the cover
plate.
Fig. 4-2
Booster cable
Electrical component box
(At shipment) (Booster cable installed)
Fan motor socket
Fan
motor
How to read the diagram
The vertical axis is the external static pressure
(in.WG) 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 flo w. For the 24
type, the air flow 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 flow volume
may drop too low at each air outlet. This problem may
be solved by increasing the fan speed as explained above.
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:
Booster cable
0
0.20
0.40
0.60
(in.WG)
0
0.20
0.40
0.60
0
(in.WG)
0.20
0.40
0.60
0
(in.WG)
Limit line
Limit line
Exter
nal Static Pressure
Exter
nal Static Pressure
Limit line
Limit line
Limit lin
e
Limit line
TD831138-02_W-2WAY.indb 49 2007/07/26 14:33:00