Installation | |
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2.6.2Oil Cooler Fan Control
The Compressor Module temperature is controlled by managing module oil flow and temperature. The module’s precise temperature control is critical to system performance and equipment life. Maintaining proper temperature control also reduces the possibility of gas condensing into liquids during operation.
•Cooling fans require 24VDC, 4.5A (105 Watts) for the Compressor Module. Fan speed is controlled by a
•High temperature Compressor Modules use a linear NTC thermistor to monitor oil temperature. This signal is available to support a
•All power connections are wired to terminal strips in a junction box on the Compressor Module.
Figure 6 Brushless DC Fan
+24VDC
DC common
RED
Blue
No connection feedback
White
Figure 7 Basic Fan Control System
PTC Thermistor
Dropping ResistorIn Thermowell
One Fan 100 K Ohms
Two Fans 60.4 K Ohms
Yellow
Red Wire – 24VDC | Yellow Wire – | Blue Wire – DC Common | |
To fan speed control | |||
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The PTC Thermistor is nonlinear and switches to high resistance in the
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