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4
Installation manual ECO-W
4. Connecting the heating of several rooms to the bus
1.
Connect the bus cables as shown in the figure.
The ECO connection in which the heating of several rooms has been
linked through the bus. In the example, Room No 1 has two
heaters and Room No 2 has one heater.
D- D+ V
T
N L
Control BUS
230 VAC
Room 1
Master
Slave
ECO-T
D- D+ V
T
B A
T
ECO air heater
D- D+ V
T
N L
ECO air heater
One ECO-T
control unit
can control
1–4 ECO air
heaters
One ECO-T
control unit
can control
1–4 ECO air
heaters
ECO-T
D- D+ V
T
D- D+ V
T
N L
Control BUS
B A
230 VAC
Room 2
T
ECO air heater
The ECO connection in which the heating of several rooms has been linked
through the bus.
ON
D- D+ V
T
B A
CONTROL BUS
BUS
Term.
T
OFF
D- D+ V
T
B A
CONTROL BUS
BUS
Term.
T
ECO air heater
ECO air heater
ECO air heater
BUS:
Modbus-ID: 1..9
BUS:
Master
ON
D- D+ V
T
B A
CONTROL BUS
BUS
Term.
T
Modbus settings
Modbus ID
Stop bits
Baudrate
Master
38400
1
Modbus settings
Modbus ID
Stop bits
Baudrate
1
38400
1
Modbus settings
Modbus ID
Stop bits
Baudrate
2
38400
1
NOTE! Electrical connections may only be made by a professional electrician.
WARNING! The supply air device carries a voltage of 230 V.
U = 230 V In = 1.7 A
The connect signal D-/D+ is RTU.
For the BMS connection settings, see Appendix 1. ECO ModBus map.
The recommended data cable between the controller and the air heater is e.g., NOMAK 2x2x0.5+0.5
Figure 4.1
Figure 4.2
