VAV Controllers LVC-LowVelocity - TROX

More documents

Recommendations

Info

Flow rate setting Each LVC-LowVelocity carries a sticker with a flow rate scale to determine the setting values at the customer’s site (see example above, nominal size 200). Variable flow rate control The required flow rates must be set by the customer. If Vmin is set higher than V max , Vmin is provided as a constant flow rate even if a control signal is transmitted. If Vmin is set to 0%, control is between shut-off and V max . If the control signal falls below 0.1 VDC, the control damper closes (leakage flow only). Vmin V max Constant flow rate control The constant flow rate is set with the Vmin potentiometer. Any setting on the V max potentiometer is in this case irrelevant. Vmin V max BMS operation To have the BMS determine the volume flow rate, the Vmin potentiometer must be set to 0% and the V max potentiometer to 100%. If the control signal falls below 0.1 VDC, the control damper closes (leakage flow only). Vmin V max Factory setting Units are delivered with settings Vmin = 40 % and V max = 80%. Vmin V max 10
Flow characteristics · Wiring examples Characteristics of the control signal (example) Characteristics of the actual value signal V min unit V Nom V min unit V Nom Value to be set = V V Nom × 100 % Control signal w in V Actual value signal U in V Volume flow rate in % of V Nom Volume flow rate in % of V Nom Variable flow rate control Room temperature controller The supply voltage and the remote room temperature controller must be connected as shown in the circuit diagram on the left. TROX Compact Constant flow rate control As soon as the 24 V supply voltage is applied, the controller runs the set Vmin value as a constant flow rate. TROX Compact Changeover V min / V max S1 TROX Compact Override controls OPEN / CLOSED S2 S3 Diode 1N 4007 TROX Compact Switch S1 enables a changeover between the two constant flow rates Vmin and V max . Switch S1 open : Vmin Switch S1 closed : V max When multiple LVC-LowVelocity units are connected in parallel, switch S1 must be used as changeover switch and the contact for Vmin operation must be connected to the ground (terminal 1). The override controls for OPEN and CLOSED (see left) can be achieved using external switches (potential-free contacts); this applies to AC voltage only. Switch S2 closed: Damper blade CLOSED Switch S3 closed: Damper blade OPEN All override controls can be combined both with each other and with the different circuit options. All connections and wiring done by the customer must comply with the generally accepted standards of good practice and any specific local standards. 11
Page 1 and 2: 5/5/EN/1 VARYCONTROL VAV Controller
Page 3 and 4: Innovation TROX LVC-LowVelocity - t
Page 5 and 6: Construction · Dimensions Characte
Page 7 and 8: Acoustic quick selection Using quic
Page 9: Case-radiated noise Example (contd.

VAV Controllers LVC-LowVelocity - TROX

Create successful ePaper yourself

Delete template?

Save as template?