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EN1Z-1076GE51 R0722
MERLIN NX
IP AND MS/TP VAV CONTROLLER
INSTALLATION
INSTRUCTIONS
General ......................................................................... 2
Trademark Information............................................... 2
Product Description ................................................... 2
Dimension.................................................................. 3
Network Security ......................................................... 3
General Safety Instructions........................................ 3
Specifications .............................................................. 4
Electrical .................................................................... 4
Operational Environment ........................................... 4
Sylk™ Supported Devices ......................................... 4
Hardware ................................................................... 4
Integrated Actuator......................................................... 4
Differential Pressure Sensor...................................... 4
BACnet Communications........................................... 5
Modbus Client............................................................ 5
Weight And Dimensions............................................. 5
Universal IO ............................................................... 5
Solid State Relay (SSR) ............................................ 5
Wireless Connectivity ................................................ 5
Standards and Compliances...................................... 5
HARDWARE OVERVIEW ............................................. 6
IP Variant ................................................................... 6
MS/TP Variant............................................................ 6
Controller Terminals ................................................... 7
Service Button ........................................................... 8
Mounting ...................................................................... 8
Before Mounting Actuator onto the Damper Shaft ..... 8
Mounting Actuator onto Damper Shaft....................... 9
Airflow Sensor Connection ...................................... 10
Differential Pressure Installation .............................. 11
Airflow Sensor Replacement ................................... 12
Power supply ............................................................. 13
General Information ................................................. 13
Power Wiring ........................................................... 13
Power Wiring Examples........................................... 14
Input / Output Wiring................................................. 15
Wiring Requirements ............................................... 15
Internal Wiring Examples......................................... 16
UIO Wiring Examples .............................................. 17
SSR (DO) Wiring Examples..................................... 18
20 VDC Auxiliary Wiring Examples.......................... 18
Networking Concepts................................................ 19
The RS485 Standard ............................................... 19
Network Topologies ................................................. 19
Daisy Chain ............................................................. 19
Spanning Tree Protocol (RSTP) .............................. 19
BACnet IP ................................................................... 20
DHCP IP Configuration............................................ 20
Static IP Configuration ............................................. 20
Connect to a IP network........................................... 20
Antenna ...................................................................... 20
Installing the Local Antenna ..................................... 20
Installing the Remote Antenna ................................. 20
Remote Antenna Placement .................................... 21
BACnet MS/TP VARIANT ........................................... 22
Termination Resistors .............................................. 22
RS-485 Bias Switches ............................................. 22
BACnet MSTP Wiring Example ............................... 22
BACnet MSTP Controller........................................... 23
Automatic MAC Addressing ..................................... 23
Manual configuration of the MAC Address............... 23
Setting the Device Instance Number ....................... 24
Connecting to BACnet MS/TP Buses ...................... 24
Modbus RTU............................................................... 25
Modbus Defaults ...................................................... 25
Wiring Topology ....................................................... 25
Modbus Master Specifications ................................. 25
Sylk Bus™ .................................................................. 26
Supported wall modules........................................... 26
Sylk Bus Wiring Examples ....................................... 26
Bluetooth Balancing.................................................. 27
Overview .................................................................. 27
Troubleshooting......................................................... 28
BACnet and Modbus LED Status............................. 28
Bluetooth LED Status............................................... 28
Controller LED Status .............................................. 28
Regulatory Information ............................................. 30
FCC Regulation ....................................................... 30
Canadian Regulatory Statement.............................. 30
Approvals and Certifications .................................... 31
Appendix .................................................................... 32
Sensor Input Accuracy ............................................. 32
Recognition of Sensor Failure of Sensor Inputs ...... 32
Sensor Characteristics.............................................. 32
PT1000 .................................................................... 33
PT3000 .................................................................... 36
NTC10K TYPE II...................................................... 36
NTC10K TYPE III..................................................... 37
PT100 ...................................................................... 37
JOHNSON A99 ........................................................ 38
NTC20K ................................................................... 38
10K3A1 .................................................................... 40
Nickel Class B DIN 43760 sensors .......................... 41
NI1000TK5000......................................................... 42
Related Technical Literature ..................................... 43
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