Salda VEGA Series, Manual

Page: 16 / 40

16 | EN VEGA v2019.06
2
3
1
Figure 18.7.1. VEGA 350 E, VEGA 700 E
1
2 3
Figure 18.7.2. VEGA 1100 E/W
19. AUTOMATIC CONTROL
19.1. ON/OFF AIR SUPPLY UNIT
When the unit is being turned on, air damper opens for 90 seconds and afterwards the fan turns on. The controller measures supply air temper-
ature once a second and, if necessary, activates the heater so that supply air temperature is as close as possible to the desired set temperature.
If the user changes fan speed with the remote control panel, the controller changes fan speed and according to that adjusts the operation of the
heater.
When the unit is being turned off, the fan runs for 60 seconds at lowest speed to cool the heater and afterwards turns off the fan and closes air
damper.
19.2. WEEKLY CALENDAR
Function of the calendar is supported by the remote control panel, so if you want to have this function, you should obtain remote control panel
FLEX.
Calendar enables to set up to 8 events a day. Each event has an indicated its operation time, fan speed, and the desired supply air temperature.
It is possible to set the same events for all working days, weekends or an entire week.
When an event is being created, remote control panel once a minute checks if there are any other commands for that period. When the remote
control panel detects a command, it sends speed and temperature settings to the controller.
Regardless calendar settings the user can manually (with remote control panel) change fan speed and desired temperature at any time.
19.3. FAN CONTROL
The controller changes motor speed with autotransformer by changing the voltage supplied to the motor. There are 3 fixed motor speeds and one
additional - zero speed, which is used to stop the unit according to calendar or Modbus setting.
When fan speed is being changed by the remote control panel of Modbus, motor stops and after a few seconds switches to a different speed. Such
a delay is necessary to protect the motor from overloading.
19.4. ELECTRIC HEATER CONTROL
Controller controls electric heater by PWM control signal. This control method allows consistent regulation of the supply air temperature, without
big temperature fluctuations. Electric heaters are not included in standard package of supply units VEGA. Air supply units can control single or a
two-phase electric heaters.
These heaters can respectively be ordered for the units:
EH 1.2 1f VEGA 350 ZESVEGA001 EH 2.4 1f VEGA 700 ZESVEGA004 EH 6.0 2f VEGA 1100 ZESVEGA010
EH 2.4 1f VEGA 350 ZESVEGA002 EH 5.0 2f VEGA 700 ZESVEGA005 EH 9.0 3f VEGA 1100 ZESVEGA011
EH 5.0 2f VEGA 350 ZESVEGA003 EH 9.0 3f VEGA 700 ZESVEGA006 EH 15.0 3f VEGA 1100 ZESVEGA012