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Electrical connection
7
MT20 Wired Timer – 6 720 882 947 (2019/07)
4 Electrical connection
NOTICE:
Electrical connection
Low voltage (signal voltage) connections only.
Do not connect the MT20 to the appliance or external 230V
supply.
Connect the MT20 cable to the appliance.
Refer to figure 6.
Follow the appliance instructions for connecting to the low
voltage (signal voltage) connections side on the appliance
control unit.
Blue wires [1]
Connect to the blue plug LV ON/OFF thermostat
connection.
Orange wires [2]
Connect to the orange plug EMS-BUS connection.
Fig. 6 Connecting the MT20
[1] Blue wires ( LV ON/OFF thermostat connection)
[2] Orange wires ( EMS-BUS connection)
5 Commissioning
5.1 Function check
Move the selector switch [1] to the on position.
Ensure the room thermostat is set to maximum
temporarily for this function test.
The appliance will fire.
Fig. 7 Function test
Set the heating times to the end user’s requirements.
section 7.3 "Setting the heating times"
Record new time settings in the table provided in the
section.
Move the selector switch [1] to the Timed position.
Set the room thermostat back to the end user’s preference.
0010021069-001
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