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Summary of Contents for NuWave NWVS-4
- Page 1 Rev.7.4 06/22 NWVS-4 & NWVS-8 I NSTALLATION AND ANUAL OLTAGE ONTROL ERNIER TAGE Rev7.4 ECHNOLOGIES...
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Page 2: Table Of Contents
Page 2 of 15 Table Of Contents Ordering Code........................3 Description .......................... 3 Key Features ........................3 Installation / Safety Information ................... 3 Limited Warranty ......................4 Mounting Instructions/Dimensions ................4 24VAC Power Input and Internal Wiring ..............5 Dipswitch Settings ....................... 6 Input Selection ...................... -
Page 3: Ordering Code
Page 3 of 15 1. Ordering Code NWVS-8 – Eight Position Step Control with Vernier Output NWVS-4 – Four Position Step Control with Vernier Output 2. Description The NWVS is a microcontroller-based step controller that provides precise modulation in multi-stage heater applications such as duct heaters. The built- in Vernier stage allows for smooth, precision control of the load without increasing switching wear in the system contactors. -
Page 4: Limited Warranty
Page 4 of 15 4.1 Limited Warranty NuWave Technologies, Inc. warrants this product to be free from defect in workmanship and materials for a period of one (1) year from the date of purchase. 1. Should unit malfunction, return it to the factory. -
Page 5: 24Vac Power Input And Internal Wiring
Page 5 of 15 4.3 24VAC Power Input and Internal Wiring The NWVS internal power supply is half wave rectified. The command input and analog outputs share a common ground with the 24VAC power input ground. The diagram below details the internal wiring of the NWVS. WARNING: EXCEEDING 30MA OR 15V ON THE COMMAND INPUT CAN PERMANENTLY DAMAGE THE NWVS CAUSING THE OUTPUTS TO STAY ON 100%. -
Page 6: Dipswitch Settings
Page 6 of 15 5. Dipswitch Settings 5.1 Input Selection S1 positions 1-5 select which command input the NWVS will accept. Switch S1 Position→ Label→ 135R 135R Input 0-5V 1-5V 0-10V* 2-10V* 0-20mA 4-20mA 0-135 OHM *If the 0-10V range is selected, the NWVS will start responding with output just above 0V on the command input. -
Page 7: Stage Selection
Page 7 of 15 5.2 Stage Selection S2 positions 1-4 select the number of output stages. Switch S2 Position→ Label→ STP3 STP2 STP1 STP0 Stages 5.3 Output Mode Selection LIFO (last in first out) and FIFO (first in first out) modes are both available by setting of S2 position 6. -
Page 8: Master/Slave Selection
Page 8 of 15 5.4 Master/Slave Selection S2 position 5 selects master or slave operation. Switch S2 Position→ Label→ Master/Slave Select Master Slave When the NWVS is set for slave operation, the command input becomes the slave input. The slave’s command input is wired to the master’s slave output. 5.5 Vernier Output Type Selection S1 position 6 selects Analog or Time Proportioning Vernier Output. -
Page 9: Vernier Ratio
Page 9 of 15 6.2 Vernier Ratio The Vernier Ratio is the ratio of the Vernier heater to the heaters used on the individual stages. The Vernier Ratio is adjustable from 100 - 200%. • If the Vernier heater is the same power as the individual stage heaters, then the Vernier Ratio should be set to 100%. -
Page 10: Vernier Output - Master/Slave Configuration
Page 10 of 15 S SR INPUT VOLT AGE DROP (VDC) SSR DRIVE CURRENT vs SSR VOLTAGE DROP AND POWER SUPPLY 9.3 Vernier Output - Master/Slave Configuration In a Master-Slave Configuration, the master unit’s Vernier output should be used for driving the SSR or SCR Power Control. 10. - Page 11 Page 11 of 15 Stage Delay Adjustable from 0-180 seconds via potentiometer. Verneir Ratio Adjustable from 100 to 200% via potentiometer. Stage Output Indication - Each Stage has a Red LED that is energized when the relay coil on the board is energized. The Red LED does not directly detect the state of the normally open relay output, but if the relay is operating correctly, the contacts should be closed when...
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Page 12: Wiring Diagrams
Page 12 of 15 11. Wiring Diagrams 11.1 Command Input Wiring Rev7.4 ECHNOLOGIES... -
Page 13: Stage Wiring - Time Proportioned Vernier For Ssr Drive
Page 13 of 15 11.2 8 Stage Wiring - Time Proportioned Vernier for SSR Drive WARNING: FIRE HAZARD!! Even quality electronic components CAN FAIL KEEPING FULL POWER ON! Provide a SEPARATE (redundant) OVER TEMPERATURE SHUTDOWN DEVICE to switch the power off if safe temperatures are exceeded. -
Page 14: Stage Wiring - Scr Power Control On Vernier
Page 14 of 15 11.3 8 Stage Wiring – SCR Power Control on Vernier WARNING: FIRE HAZARD!! Even quality electronic components CAN FAIL KEEPING FULL POWER ON! Provide a SEPARATE (redundant) OVER TEMPERATURE SHUTDOWN DEVICE to switch the power off if safe temperatures are exceeded. -
Page 15: Stage Wiring Using Slave Board
Page 15 of 15 11.4 16 Stage Wiring Using Slave Board WARNING: FIRE HAZARD!! Even quality electronic components CAN FAIL KEEPING FULL POWER ON! Provide a SEPARATE (redundant) OVER TEMPERATURE SHUTDOWN DEVICE to switch the power off if safe temperatures are exceeded.
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