Question: I run a housing development and want to set up Magna’s for estimating (non-billable) BTU monitoring. Can this be done with these pumps through a Delta T option?
Answer: Yes, it can be in Differential Temperature control mode. The pump should piped on the supply side using the built in sensor. It is accomplished by adding an external Magna 3 Delta T temperature sensor on the return side, (P/N 98477669). It includes a six foot 4-wire AWG22 cable cable which is to be connected to the analog input shown below.
Go to SETTINGS, drop down to ANALOG INPUT and select the sensors parameters of 0-10V or 4-20 mA . Note that each pump must have its own sensor even if connected in a lead-lag control. If needed, the 6′ cable can be extended with a 22 gauge shielded cable. The last step is to go to the home screen and add the differential temperature for the setpoint.
For installation instructions, see the download below:
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