Instruction manual WWH-EC and WWH-LT Air heater
Page 10/14
4.3.4 Combinations with a stepless switch.
To reduce the noise level of the WWH, it’s possible to install an optional stepless fan switch. This switch
will regulate the fan speed of the WWH. Please note that if the fan speed is lower, the heat discharge of
the heater will be lower as well.
The WWH with EC motor comes with several varieties.
Alternative 1, motor with internal connectors
Alternative 2, motor without connectors:
There are 3 alternatives for speed control:
1.
Maximum speed only (factory setting)
2.
With speed control
3.
External via 0-10V
L1
N
T1
T2
S3
2
4V
1
0V
G
N
D
D
1
E
1
L1
N
230V AC
GND (0V)
10V (OUT)
0-10V ( IN )
EC Motor
Connector
L1
N
T1
T2
S3
10
V
G
N
D
E
1
L1
N
230V AC
GND (0V)
10V (OUT)
0-10V ( IN )
EC Motor
Connector
