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SmartFan® Stratus Manual
Temperature Control Mode
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Unless otherwise specified, Stratus P/Ns 240F400 and 240F400E are factory set to control fans in the Temperature Control mode. Control Resources recommends the P10 Air Temperature Sensor. Other sensor styles can also be found on our Sensors page. To control via voltage, current source or remote transducer make sure SW3 DIP switches 1-8 are set to OFF, set SW2 DIP switches as shown below, then refer to the control mode section you have selected to customize the Stratus for your application.
| Table 2: Setting Control Modes via Switch SW2 |
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1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
| MODBUS |
OFF |
OFF |
OFF |
OFF |
OFF |
OFF |
OFF |
OFF |
| Voltage |
ON |
ON |
OFF |
OFF |
OFF |
OFF |
OFF |
OFF |
| Current |
ON |
ON |
ON |
ON |
OFF |
ON |
OFF |
ON |
| Temperature |
ON |
ON |
OFF |
OFF |
ON |
OFF |
ON |
OFF |
| Transducer |
Contact CRI Customer Service |
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| USING SINGLE-PHASE OR THREE PHASE MOTORS (switch SW1: #8) |
| The Stratus can control single or three-phase motors from a single-phase power source. To control a single-phase motor, set SW1, #8 to the OFF position, to control a three-phase motor, set SW1, #8 to the ON position.
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USING TEMPERATURE CONTROL MODE |
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The Stratus can automatically control temperature (air, liquid or surface) by proportionately increasing or decreasing motor/fan speed as required. One or 2 sensors can be used to sense temperature. When more than one sensor is used, the hottest sensor will control fan speed. To set the Stratus to the temperature control, switch SW1 #7 OFF then refer to table 2 for SW2 switch settings.
Control Temperature (switch SW1: #4,5)
The control temperature is the point above which fans will run at full speed (TC). The Stratus is factory set to control fans at 30, 35, 40 or 45˚C by setting DIP switch SW1 #4 and #5. The default setting is 35˚C. Other temperature setting can be supplied, contact customer service for details.
| Table 4: Control Temperature DIP Switch Settings |
| Control Temperature (Tc) |
SW1 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 (SW1: #2,3)
The idle speed is the minimum frequency (speed) supplied to the motor. The Stratus can be set for idle speeds of 0, 20, 40 or 60% by setting SW1 DIP switches 2 and 3. The default idle setting is 40%. Other idle speeds can be supplied, contact customer service for details. See table 3.
Temperature Slope (SW1: #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 SW1 DIP switch #6. The default setting is 4°C. Other slopes can be supplied, contact customer service for details. See figure 3.
| Table 5: Temperature Slope DIP Switch Settings |
| Temp. Slope (Ts) |
SW1 Dip switch |
| Ts (°C) |
Ts (°F) |
6 |
| 4 |
7 |
OFF |
| 10 |
18 |
ON |
Fan On / Fan Off Feature (SW1 #1)
To turn fans off automatically when temperatures drop below the set idle temperature (TC – TS), set DIP switch SW1, #1 to the ON position. To keep fans running at idle speed below the set idle temperature, set switch #1 to the OFF position. See figure 3.
Figure
3
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Use the links below for addtional manual pages or for a complete manual (8 pages), click on the Operation/Installation Manual PDF link above.
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