Water source heat pump module, Troubleshooting – Orion System Water Source Heat Pump Module Tulsa User Manual
Page 16
Water Source Heat Pump Module
Technical Guide
16
OE275-01 Suction Pressure Transducer
Testing for R-22 & R-410A Refrigerant
The Evaporator Coil Temperature is calculated by converting the Suc-
tion Pressure to Temperature. The Suction Pressure is obtained by using
the OE275-01 Suction Pressure Transducer, which is connected into the
Suction Line of the Compressor.
Use the voltage column to check the Suction Pressure Transducer while
connected to the WSHP Module. Read voltage with a meter set on DC
volts. If the temperature/voltage or pressure/voltage readings do not
align closely with the chart, your Suction Pressure Transducer is prob-
ably defective and will need to be replaced.
See the OE275-01 Suction Pressure Transducer, Press pressures.ure,
Temperature, and Voltage Charts for R-22 and R-410A Refrigerant test-
ing (Tables 6 & 7). The charts show a temperature range from 20°F to
80°F. For troubleshooting purposes, the DC Voltage readings are also
listed with their corresponding temperatures and
Table 7: Coil Pressure/Voltage/Temp for OE275-01
Suction Pressure Transducers - R-410A Refrigerant
Troubleshooting
OE275-01 Suction Pressure Transducer Coil Pressure
– Temperature – Voltage Chart for R-410A Refrigerant
T
emperature
°F
Pressure
PSI
Signal
DC V
olts
T
emperature
°F
Pressure
PSI
Signal
DC V
olts
21.19
80.94
1.8
59.03
168.10
3.2
24.49
87.16
1.9
61.17
174.32
3.3
27.80
93.39
2.0
63.19
180.55
3.4
30.99
99.62
2.1
65.21
186.78
3.5
33.89
105.84
2.2
67.23
193.00
3.6
36.80
112.07
2.3
69.24
199.23
3.7
39.71
118.29
2.4
71.15
205.46
3.8
42.30
124.52
2.5
72.95
211.68
3.9
44.85
130.75
2.6
74.76
217.91
4.0
47.39
136.97
2.7
76.57
224.14
4.1
49.94
143.2
2.8
78.37
230.36
4.2
52.23
149.42
2.9
80.18
236.59
4.3
54.50
155.65
3.0
56.76
161.88
3.1
Table 6: Coil Pressure/Voltage/Temp for OE275-01
Suction Pressure Transducers - R-22 Refrigerant
OE275-01 Suction Pressure Transducer Coil Pressure
– Temperature – Voltage Chart for R-22 Refrigerant
T
emperature
°F
Pressure
PSI
Signal
DC V
olts
T
emperature
°F
Pressure
PSI
Signal
DC V
olts
20.00
31.13
1.0
55.32
93.39
2.0
20.00
37.36
1.1
58.86
99.62
2.1
20.46
43.58
1.2
62.13
105.84
2.2
25.71
49.80
1.3
65.27
112.07
2.3
30.84
56.03
1.4
68.42
118.29
2.4
35.41
62.26
1.5
71.39
124.52
2.5
39.98
68.49
1.6
75.20
130.75
2.6
44.00
74.71
1.7
77.00
136.97
2.7
48.00
80.94
1.8
79.80
143.20
2.8
51.78
87.16
1.9
80.00
149.42
2.9