© Munters AB, 2018 6
1 Precautions
•
Grounding
•
Checking the Battery Level
1.1 Grounding
•
Keep the controller as far as possible from heavy contactor boxes and other sources of
electrical interference
.
•
Do not connect communication wire shields, which go from one house to another at both ends.
Connect them at one end only. Connection at both ends can cause ground loop currents to
flow, which reduce reliability
.
•
The COM connection for communications is not the shield wire. The COM, RX and TX wires
must connect to each other at all controllers
.
1.2 Checking the Battery Level
•
Check the battery once a year. The output must be 2.7 volts (minimum). Authorized personnel
only must replace the battery if the output is below the minimum required level or every five
years.
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