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SmartFan® Nimbus Manual
Temperature Control Mode
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SETTING CONTROL MODES (switches #7, 8) |
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Unless otherwise specified, the Nimbus is factory set to control fans in the Temperature Control mode. To control via a current or voltage source, remote powered transducer or fixed speed setting, set switches 7 and 8 as shown below, then refer to the control mode section you have selected to customize the Nimbus for your application.
| Table 2: Setting Control Modes |
| Control Via |
Dip switch |
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7 |
8 |
| Current or Voltage |
ON |
OFF |
| Remote Powered Transducer |
OFF |
ON |
| Temperature |
OFF |
OFF |
| Fixed Speed |
ON |
ON |
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USING TEMPERATURE CONTROL MODE |
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The Nimbus can automatically control temperature (air, liquid or surface) by proportionately increasing or decreasing fan speed as required. Up to 3 sensors can be used to sense temperature. When more than one sensor is used, the hottest sensor will control fan speed. To set the Nimbus to temperature control mode refer to table 2.
Control Temperature (switch #4,5)
The control temperature is the point above which fans will run at full speed (TC). The Nimbus is factory set to control fans at 30, 35, 40 or 45˚C by setting DIP switches 4 and 5. The default setting is 35˚C. Other temperature setting can be supplied, contact customer service for details.
| Table 4: Setting Control Modes |
| Control Temperature (Tc) |
Dip switch |
| Tc (°C) |
Tc (°F) |
4 |
5 |
| 30 |
86 |
OFF |
ON |
| 35 |
95 |
OFF |
OFF |
| 40 |
104 |
ON |
OFF |
| 45 |
113 |
ON |
ON |
Setting Idle Speed (switch #2,3)
The idle speed is the minimum voltage (as a % of supply voltage) supplied to the fan. The Nimbus is factory set for idle speeds of 30, 40, 50 and 60% by setting DIP switches 2 and 3, see table #3. The default setting is at 50%. Other idle speeds can be supplied, contact customer service for details. See figure 7.
Temperature Slope (switch #6)
The temperature slope (TS) is the temperature difference between idle speed and full speed. The slope can be set at 4˚C or 10˚C by using DIP switch #6. The default setting is 4˚C. Other slopes can be supplied, contact customer service for details. See figure 7.
| Table 5: Temperature Slope DIP Switch Settings |
| Temp. Slope (Ts) |
Dip switch |
| Ts (°C) |
Ts (°F) |
6 |
| 4 |
7 |
OFF |
| 10 |
18 |
ON |
Fan On / Fan Off Feature (switch #1)
To turn fan(s) off below the set idle speed (see table 3), set switch #1 to the ON position. To keep fans running at idle speed below the set idle speed, set switch #1 to the OFF position. See figure 7.
Figure 7
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Use the links below for addtional manual pages or for a complete manual (9 pages), click on the Operation/Installation Manual PDF link above.
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