Application
Standard filtration in comfort air conditioning systems allows for use of the controller in the supply air without additional dust protection. Since a partial volume flow is passed through the transducer in order to measure the volume flow rate, please note:
Parts and characteristics
Functional description
VAV terminal units control the volume flow in a closed loop, i.e. measurement – comparison – control.
The volume flow rate is determined by measuring the differential pressure (effective pressure). For this purpose the VAV terminal unit is fitted with a differential pressure sensor.
The integral differental pressure transducer transforms the effective pressure into a voltage signal. The volume flow rate actual value is hence available as a voltage signal. The factory setting is such that 10 V DC always corresponds to the nominal volume flow rate (Vnom).
The volume flow rate setpoint value comes from a higher-level controller (e.g. room temperature controller, air quality controller, central BMS) or from switch contacts. Variable volume flow control results in a value between Vmin and Vmax. It is possible to override the room temperature control, e.g. by a complete shut-off of the duct.
The controller compares the volume flow rate setpoint value to the actual value and controls the integral actuator accordingly.
The volume flow rate parameters Vmin and Vmax are factory set on potentiometers. Voltage ranges are factory stored in the controller. Changes on the customer's site can easily be carried out using an adjustment device or a notebook with service tool.
Volume flow control
Any attachments are to be defined with the order code of the VAV terminal unit.
Universal controller, dynamic, for VAV terminal units
B13 | M546GA4 | VRD3 | M466DJ8 | NM24A-V | ① ② ④ |
B11 | M546GA4 | VRD3 | M466DG8 | SM24A-V | ③ |
B1B | M546GA4 | VRD3 | M466DR1 | NF24A-V (spring return actuator) | ① ② ③ ④ |
B27 | M546GA4 | VRD3 | M466DJ8 | NM24A-V | ⑤ |
XC3 | M546ED4 | GUAC-D3 | A00000051738 | 361C-024-20-V/ST07 (spring return actuator) | ① ② ③ ④ |
① TVR
② TVJ
③ TVT
④ TZ-Silenzio, TA-Silenzio, TVZ, TVA
⑤ TVM
Application
Construction
Volume flow controller VRD3 with
Signal voltage range
Operating modes
E: Single and M: Master
S: Slave operation
F: Constant value
Parameters are factory set. The customer defines the required operating mode and the volume flow rates in the order code at the time of ordering. The jumper for input w is factory set to VRD3.
Commissioning
Volume flow controller VRD3
Supply voltage (AC) | 24 V AC ± 20 %, 50/60 Hz |
Supply voltage (DC) | 24 V DC −10/+20 % |
Power rating (AC) | without actuator max. 3.5 VA |
Power rating (DC) | without actuator max. 2 W |
Setpoint value signal input | 0 – 10 V DC, Ra > 100 kΩ |
Actual value signal output | 0 – 10 V DC, 0.5 mA max. |
IEC protection class | III (protective extra-low voltage) |
Protection level | IP 40 |
EC conformity | EMC according to 2014/30/EU |
Weight | 0.440 kg |
Actuators NM24A-V and NM24A-V-ST
Supply voltage | from the controller |
Power rating (AC) | 6 VA max. |
Power rating (DC) | 3.5 W max. |
Torque | 10 Nm |
Running time for 90° | 150 s |
Control signal | from the controller |
IEC protection class | III (protective extra-low voltage) |
Protection level | IP 54 |
EC conformity | EMC according to 2014/30/EU |
Weight | 0.710 kg |
Actuators SM24A-V and SM24A-V-ST
Supply voltage | from the controller |
Power rating (AC) | 6 VA max. |
Power rating (DC) | 4 W max. |
Torque | 20 Nm |
Running time for 90° | 150 s |
Control signal | from the controller |
IEC protection class | III (protective extra-low voltage) |
Protection level | IP 54 |
EC conformity | EMC according to 2014/30/EU |
Weight | 0.910 kg |
Spring return actuators NF24A-V and NF24A-V-ST
Supply voltage | from the controller |
Power rating (AC) | 9 VA max. |
Power rating (DC) | 6.5 W max. |
Torque | 10 Nm |
Running time for 90° | 200 – 300 s |
Spring return time | < 20 s |
Control signal | from the controller |
IEC protection class | III (protective extra-low voltage) |
Protection level | IP 54 |
EC conformity | EMC according to 2014/30/EU |
Weight | 1.91 kg |
Application
Construction
XC3: Volume flow controller GUAC-D3 with spring return actuator 361C-024-20-V/ST07 for TVR, TVJ, TVT, TZ-Silenzio, TA-Silenzio, TVZ, TVA
Signal voltage range
Operating modes
E: Single and M: Master
S: Slave operation
F: Constant value
Parameters are factory set. The customer defines the required operating mode and the volume flow rates in the order code at the time of ordering.
Commissioning
Volume flow controller GUAC-D3
Supply voltage (AC) | 24 V AC ± 20 %, 50/60 Hz |
Supply voltage (DC) | 24 V DC ± 20 % |
Power rating (AC) | without actuator max. 1.2 VA |
Power rating (DC) | without actuator max. 0.6 W |
Setpoint value signal input | 0 – 10 V DC, Ra > 100 kΩ |
Actual value signal output | 0 – 10 V DC, 0.5 mA max. |
IEC protection class | III (protective extra-low voltage) |
Protection level | IP 42 |
EC conformity | EMC according to 2014/30/EU |
Spring return actuator 361C-024-20-V
Supply voltage | from the controller |
Power rating (AC) | 10 VA max. |
Power rating (DC) | 8 W max. |
Torque | 20 Nm |
Running time for 90° | 150 s |
Spring return time | < 15 s |
Control signal | from the controller |
IEC protection class | III (protective extra-low voltage) |
Protection level | IP 54 (cable entry at the bottom) |
EC conformity | EMC according to 2014/30/EU |
Weight | 1.8 kg |
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Contatti
Siamo qui per te
Specifichi il suo messaggio ed il tipo di richiesta
Tel.: +39 029829741 | Fax: +39 0298297460
Contatti
Grazie per il tuo messaggio!
Il tuo messaggio è stato inviato e sarà processato a breve.
Il nostro dipartimento per la gestione delle richieste ti contatterà appena possibile.
Per domande di carattere generale riguardanti i nostri prodotti o servizi, è possibile contattare:
Tel.: +39 029829741 | Fax: +39 029829760