Service Manual

7 of 48 © 2015 680_D - 10/15
Sensor Wiring
20V
3
dc
Out In
+
4
mA
Flow
Sensor
An analog flow sensor can be connected to the control to provide flow and energy monitoring. The control
supports a 4-20 mA style sensor. Examples of compatible aftermarket flow sensors include:
• Kele SDI series
• Kele 200 series with 310 transmitter
• Kele 2200 series
• Kele 3100 series
• Omega FV100 series
• Omega FV-500C series
• Omega FTD-40 series
• Omega FTD-47 transducer
Using the system supply sensor and the boiler return sensor, energy output can be calculated and displayed
from the flow measurement. The control provides a 20 V (dc) powered output to the flow sensor.
• Connect the power input on the flow sensor to the 20 V dc Out terminal 3.
• Connect the signal return wire to mA (+) In terminal 4.
5V
dc
Out
Pressure
Sensor
In
+
6
Vdc
-
7
Gnd
5
An analog pressure sensor can be connected to the control to provide water pressure monitoring.
The control supports a 0.5-4.5 ratio metric V (dc) style pressure sensor. Examples of compatible
pressure sensors include:
• Honeywell PX2 (AA) series
• Measurement Specialties 7100 series
To connect the pressure sensor to the control:
• Connect one wire from the power supply (+5 V dc) on the pressure sensor to the 5V dc Out ter
-
minal 5.
• Connect one wire from the pressure sensor signal output to the Vdc (+) In terminal 6.
• Connect one wire from the GND (0V) on the pressure sensor to the Gnd (-) terminal 7.
Wiring the Flow Sensor ---------------------------------------------------------------------------------
Wiring the Pressure Sensor ----------------------------------------------------------------------------
Wiring the Analog Mixing Output -----------------------------------------------------------------------
The control can operate a mixing valve by providing a 0-10 V (dc) or a 4-20
mA signal to the valve actuating motor.
• If applicable, connect the mixing actuator positive (+) to terminal 1.
• If applicable, connect the mixing actuator negative (-) to terminal 2.
+
1
0-10V /
4-20mA
−
2
Analog
Mixing