WattMaster Water Source Heat Pump, Installation & Operation Manual

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WattMaster WHP Section 4
4-42 Start-Up and Troubleshooting
5.6 Pressure Sensor Voltage Chart
PRESSURE
PSI
CURRENT
MILIAMPS
VOLTAGE AT
INPUT
VDC*
0 4.00 1.00
1 4.32 1.08
2 4.64 1.16
3 4.96 1.24
4 5.28 1.32
5 5.60 1.40
6 5.92 1.48
7 6.24 1.56
8 6.56 1.64
9 6.88 1.72
10 7.20 1.80
11 7.52 1.88
12 7.84 1.96
13 8.16 2.04
14 8.48 2.12
15 8.80 2.20
16 9.12 2.28
17 9.44 2.36
18 9.76 2.44
19 10.08 2.52
20 10.40 2.60
21 10.72 2.68
22 11.04 2.76
23 11.36 2.84
24 11.68 2.92
25 12.00 3.00
26 12.32 3.08
27 12.64 3.16
28 12.96 3.24
29 13.28 3.32
30 13.60 3.40
31 13.92 3.48
32 14.24 3.56
33 14.56 3.64
PRESSURE
PSI
CURRENT
MILIAMPS
VOLTAGE AT
INPUT
VDC*
34 14.88 3.72
35 15.20 3.80
36 15.52 3.88
37 15.84 3.96
38 16.16 4.04
39 16.48 4.12
40 16.80 4.20
41 17.12 4.28
42 17.44 4.36
43 17.76 4.44
44 18.08 4.52
45 18.40 4.60
46 18.72 4.68
47 19.04 4.76
48 19.36 4.84
49 19.78 4.92
50 20.00 5.00
*Notes
:
1. Use the voltage column to compare the
meter voltage with the sensor connected to
the controller and with the controller pow-
ered.
2. Read voltage with meter set on DC volts.
Place the “-”(minus) lead on GND terminal
and the “+”(plus) lead on the sensor input
terminal being investigated.
3. If the voltage is less than 0.05 VDC, then
the sensor or wiring is “shorted” or “open”