CAUTION | Be careful since the fan will start when you | |
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(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.
3-18. Increasing the Fan Speed
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 4 screws on the electrical component box and remove the cover plate.
U(2) Disconnect the fan motor sockets in the box.
(3)Take out the booster cable (sockets at both ends) clamped in the box.
Indoor Fan Performance
Power supply outlet
Fig.
(4) | Securely connect the booster cable sockets between the |
| disconnected fan motor sockets in step 2 as shown in |
| Fig. |
(5) | Place the cable neatly in the box and reinstall the cover |
( | 7, 12 Type (in.Aq) | ( | 18 Type | (in.Aq) | ||||
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External Static Pressure
14.5
7.3
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0 |
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177353
Air Flow (ft.3/minute)
Air
0
353 530 Flow (ft.3/minute)
How to read the diagram
The vertical axis is the external static pressure (psi, in.Aq) while the horizontal axis represents the air flow
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24 Type
36 Type | (in.Aq) |
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(ft.3/minute). The characteristic curves for “HT,” “H,” “M” and “L” fan speed control are shown. The nameplate values are shown based on the “H” air flow. For the 24 type, the air flow is 635 ft.3/minute, while the external static pressure is 7.1 ⋅
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0.621.8
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0.4ssu 14.5 Pre
al Static
0.2n 7.3 Exter
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353 706
Air Flow (ft.3/minute)
706 | 1059 |
Air Flow (ft.3/minute)
NOTE HT : Using the booster cable
H: At shipment
Fig.
42
