WattMaster Water Source Heat Pump, Installation & Operation Manual, Page: 119 / 126

WattMaster WHP Section 4
Start-Up and Troubleshooting 4-37
5.4.2 Checking the Loop Controller Outputs
Diagram Overview
12V
GND
AIN1
AIN2
AIN3
AIN4
AOUT2
GND
+
-
R
SET METER TO
READ DC VOLTS
ALL READINGS ARE TAKEN
WITH THE (-) LEAD OF THE
METER ON THE GND
TERMINAL
+
AIN5
AIN7
GND
AOUT1
-
The analog output wiring can be checked at
the Loop Controller by checking voltages on
the Analog Output Connector.
Note: The Loop Controller must be pow-
ered for these tests.
Measurements
Meter Acceptable Range
Ignore readings for any connections which are not used in the equip-
ment.
AOUT1
Pump VFD
This output will vary between 0 and 10 VDC to correspond with pump
pressure setpoint.
AOUT2
Mod. Heat
This output will vary between 0 and 10 VDC to correspond with Heat
Addition setpoint.