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VEGA 350E/700E/1100E/1100W
When the unit is being turned on, air damper opens for 90 seconds and afterwards the fan turns on. The controller measures supply air temperature
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 o, the fan runs for 60 seconds at lowest speed to cool the heater and afterwards turns o the fan and closes air damper.
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.
The controller changes motor speed with autotransformer by changing the voltage supplied to the motor. There are 3 xed 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 dierent speed. Such a
delay is necessary to protect the motor from overloading.
1. FAN MOTOR PROTECTION
It is normally closed contacts A4, GND in connection X1. Contacts are for the connection of engine thermocontacts. When thermocontacts interrupts
the circuit, the controller displays an error A4 and stops the system. The same error A4 can be triggered by thermocontacts of engine transformer. If
the transformer’s temperature reaches 70°C or more, the controller responds the same: an error A4 occurs and stops the system.
2. HEATERS OVERHEAT PROTECTION
Control box has a potential free normally closed contacts A6, GND in connection X1. Input gives a signal about active electric heater protection. When
the circuit is interrupted, the controller displays an error A6 and stops the system.
3. OUTPUT FOR EXTERNAL ALARM
It is potential free normally closed contacts A1, GND in connection X1. Contacts are for the reception of the signal of an external alarm. Most often,
these contacts are connected to the re safety system. When the circuit is interrupted, the controller displays alarm A1 and stops the system.
4. FOR THE PRESSURE RELAYS OF THE FILTER
It is normally opened potential-free contacts Filter, GND in connection X1. Contacts are used to receive a signal from the pressure rely. When pressure
relay is activated, the circuit between the contacts is being closed. If the circuit remains closed for 60 sec., contaminated lter alarm (FIL) is displayed.
The system is not stopped.
5. FOR THE SUPPLIED AIR TEMPERATURE SENSOR
Contacts Ain1 are provided for the connection of supply air temperature sensor, GND in connection X1. Supply air temperature sensor’s technical
characteristics are provided in the table below.
Controller controls electric heater by PWM control signal. This control method allows consistent regulation of the supply air temperature, without big
temperature uctuations. 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
Controller version Ventik-W has a water heater frost protection function. This feature works dierently when the controller is in normal mode and when
in standby mode.
Protection in standby mode:
When active standby mode, the controller every second measures the air temperature and the return water temperature.
If the air temperature is higher than 0 oC, protection is not activated.
If the air temperature drops to or below 0 oC, the controller switches on the circulation pump and opens the three-way valve so that the return water
temperature will be 25 oC.
Protection in normal operation:
When the controller is in normal mode, the heater frost protection uses two parameters:
1. TAL critical return water temperature (-10 oC ... + 5 oC).
2. PBAND frost protection working zone (5 oC ... 10 oC).
TAL is a critical return water temperature. If the water temperature drops to or below this threshold, the controller stop the system and displays error A2.
PBAND enables the system react in water temperature drop, before error A2.
TAL + PBAND = TP
. TPis the lowest temperature of the water when the three-way valve and pump control is carried out under the normal supply air
temperature control mechanism. When run this mechanism, the controller is working so that the supply air temperature is as close as possible to the
set-point temperature.
If the water temperature drops below the TA, then higher priority have frost protection mechanism.
