Danfoss Turbocor TT300 User Manual

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M-SV-001-EN Rev.E
Compressor Components
3.20 Pressure/
Temperature Sensor
3.20.1 Function
The suction and discharge pressure/temperature
sensors are used to inform the compressor of
the operating pressures and temperatures at
the suction and discharge ports. These values
are used to calculate pressure ratios, saturated
temperatures, superheat and the location within
the operating envelope where the compressor is
running.
3.20.2 Connections
3.20.3 Verification
The suction pressure/temperature sensor is
secured to the IGV, above the suction port.
The discharge pressure/temperature sensor is
secured to the compressor housing, above the
discharge port. See either Table 6 (Compressor
Sensors, Cables, and Indicators (TT300/TG230))
or Table 8 Compressor Sensors, Cables, and
Indicators (TT350/TT400/TT500/TT700/TG310/
TG390/TG520)) for the location of the sensor.
The sensor connector clips link to the compressor
control cable which then connect to the
Backplane at J18 and J19.
1. Isolate compressor power.
2. Remove the Service Side Cover.
3. Disconnect the pressure/temperature cable
clip (SUCTION – J18 or DISCHGE – J19) from
the Backplane board. See Figure 93 (Pressure/
Temperature Cable Terminals).
4. Using a multimeter set for resistance
measurements, place leads on Terminal 1 and
Terminal 2 of the pressure/temperature cable
clip. See Figure 93 (Pressure/Temperature Cable
Terminals).
• The temperature sensor is a 10KΩ @ 77°F
(25°C) NTC thermistor. The resistance value
should correspond to Figure 91 (Temperature vs.
Resistance).
5. If the integrity of the cable is in question,
disconnect the compressor controller cable from
the pressure/temperature sensor.
6. Place the leads on Terminal 1 & 3 of the
pressure/temperature sensor. See Figure 94
(Pressure/Temperature Sensor Pin Locations).
To verify pressure reading, compare the readout
of the service monitoring software to a calibrated
gauge. Discharge pressure reading should
be within 50 kPa (7.25 psig). Suction pressure
reading should be within 17 kPa (2.5 psig).
• The temperature sensor is a 10KΩ @ 77°F
(25°C) NTC thermistor. The resistance value
should correspond to Figure 91 (Temperature vs.
Resistance).
Figure 93 - Pressure/
Temperature Cable Terminals

Danfoss Turbocor TT300 Specifications

General

Brand	Danfoss
Model	Turbocor TT300
Category	Air Compressor
Language	English