© Munters AB, 2016 6
2 Precautions
•
Grounding
•
Checking the battery level
2.1 Grounding
•
Always connect temperature and sensor shields to earth ground.
Avoid mixing high
voltage wiring with sensor and low voltage wiring
.
•
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
.
2.2 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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