Unit Options
41
RT-SVX19A-E4
Electric Heater
Electric heaters are fitted on the fan
discharge.
Heaters have two heating stages
and provided with two types of
overheat thermostats:
•
Automatic reset thermostats
which stop the electric heater
when the air temperature rises to
76°C. Automatic reset at 60°C. No
alarm output available.
•
The manual reset thermostat
which stop the unit when the air
temperature rises to 120°C. No
alarm output available.
Soft Starter
The soft starter is used to achieve a
progressive supply fan start and a
reduced starting current as well as
the motor starting torque. This
option is well adapted for textile
duct applications. It is factory
installed in the main control panel.
The soft starter gradually increases
the voltage of the supply fan motor
until it reaches full line voltage.
The starting time can be adjusted
from 0 to 64 seconds but the soft
starter is factory set to the
maximum starting time value,
64 seconds.
Figure 19 - Soft starter
1 = Three phase mains connections
2 = Motor connections
3 = Settings
4 = Status outputs
5 = Controls
6 = LEDs
1
2
3
4
5
6
INITAL
TORQUE
Time(s)
Motor
Softstarter
Stop / Load
Start / Line
Supply
Urg.
Stop
Ctrl
Byp.
Diag.
