Quantech QWC3050T-200T - TABLE 22 - Entering;Leaving Chilled Liquid Temp. Sensor, Temperature; Voltage Correlation

FORM QWC3-NM1
ISSUE DATE: 11/20/2020
SECTION 9 – SERVICE AND TROUBLESHOOTING
QUANTECH
158
Liquid and Refrigerant Sensor Test Points
(Table 22 on page 158)
Entering Chilled Liquid Sensor
J6-5 = +5VDC regulated supply to sensor.
J6-8 = VDC input signal to the I/O board. See Table
22 on page 158 for voltage readings that cor-
respond to specific liquid temperatures.
J6-2 = drain (shield connection = 0VDC) Return
Leaving Chilled Liquid Temperature Sensor
J6-4 = +5VDC regulated supply to sensor.
J6-7 = VDC input signal to the microboard. See Table
22 on page 158 for voltage readings that cor-
respond to specific liquid temperatures.
J6-1 = drain (shield connection = 0VDC) Return
TABLE 22 - ENTERING/LEAVING CHILLED LIQUID
TEMP. SENSOR, TEMPERATURE / VOLTAGE COR-
RELATION
TEMP °F
VOLTAGE
(SIGNAL INPUT
TO RETURN)
TEMP °C
10 1.33 -12
12 1.39 -11
14 1.46 -10
16 1.51 -9
18 1.58 -8
20 1.65 -7
22 1.71 -6
24 1.78 -4
26 1.85 -3
28 1.91 -2
30 1.98 -1
32 2.05 0
34 2.12 1
36 2.19 2
38 2.26 3
40 2.33 4
42 2.40 6
44 2.47 7
46 2.53 8
48 2.60 9
50 2.65 10
52 2.73 11
54 2.80 12
56 2.86 13
58 2.92 14
60 2.98 16
62 3.05 17
64 3.11 18
66 3.17 19
68 3.23 20
70 3.29 21
72 3.34 22
74 3.39 23
76 3.45 24
78 3.5 26
80 3.54 27