TM NHTC NORTEC LINKS 2 OPTIONS Installation Manual Manual No.
PROPRIETARY NOTICE This document and the information disclosed herein are proprietary data of WALTER MEIER LTD. Neither this document nor the information contained herein shall be reproduced used, or disclosed to others without the written authorization of WALTER MEIER LTD., except to the extent required for installation or maintenance of recipient’s equipment. All references to the NORTEC name should be taken as referring to WALTER MEIER LTD.
TABLE OF CONTENTS Subject Page 10-00 INTRODUCTION 1. OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 10-10 INSTALLATION PROCEDURES 1. 2. A. B. 3. 4. A. B. 5. NETWORKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LIST OF FIGURES Figure Page 10-10 INSTALLATION Figure 1. Figure 2. Figure 3. Sample Humidification Applications - Room-Sensed %RH Feedback with Duct Hi-Limit Sensing .16 Sample Humidification Applications - Control Feedback (0-100%) with Duct Hi-Limit Sensing . . . .16 Sample Humidification Applications - 0-10V Signal Directly to Humidifier) . . . . . . . . . . . . . . . . . . .17 10-30 TROUBLESHOOTING Figure 1. Figure 2. Figure 3. Figure 4. OnLine Diagnostic LED Locations . . . . . . . . . . . . . . .
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10-00 INTRODUCTION 10-00 Page 1 2008-02-18
(1) OVERVIEW (1) The NHTC Nortec LINKS 2 Option allows for the integration of a NHTC Series humidifier within a BACnet, Johnson N2 or LonWorks network and allows those units to concurrently be monitored via the Nortec OnLine interface. This option features a Nortec OnLine module co-existing with a gateway that has the capability of converting information from the host Modbus protocol to a specified secondary protocol.
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(1) NETWORKING (1) It is possible to network up to a maximum of 8 units to a single LINKS 2. Since each unit is separately addressed, it is possible to monitor and control each unit individually. Different networking configurations may be achieved and are mostly dependant on the type of network present at the site. One networking example could have a Gateway installed inside the lead unit, which could then be daisy-chained to successive units.
(2) WIRING (A) BACNET/MSTP, JOHNSON N2, AND LONWORKS (1) The necessary internal wiring for the Gateway is already present except for the BMS network connection that can be made via twisted-pair at terminals A and B. To network multiple units to a single Gateway, the units may be daisy-chained to each other using the network link terminals at the TB3 connection jack on the humidifier logic board. Refer to wiring diagram in section 10-50.
(3) GATEWAY CONFIGURATION (1) Protocol configuration is made at the factory, prior to final testing. Baud rates are also adjusted to the following values: Table 2. Baud Rates Protocol Default Baud Rates BACnet MS/TP 38.4 kbps BACnet / IP 10BaseT Johnson N2 9.6 kbps (2) For BACnet/IP, BACnet/MSTP and Johnson N2 applications, it is necessary to establish the modules network address parameters in order access it.
(5) VARIABLE DEFINITION IMPORTANT: In the variable name, “_x” denotes the humidifier number. If there is only one GSTC humidifier, all variable names will end in “_1”. If two units are networked together (see Figure 4), the second unit’s variable names will end in “_2”. For 3 networked units, “_3” and so on. If unsure of the unit number, each unit will have a label indicating the device instance of each humidifier.
Table 3. Variable Definitions R=Read W=Write Description LonWorks SNVT nvoHourOpt_x R Analogue Value Indicates the number of hours the humidifier cylinder has been in operation. SNVT_count_inc nvoCapLimit R Analogue Value Variable Name Reads to capacity limitation applied to the unit output. SNVT_switch (50-100%) nvoRHDem1_x R Analogue Value Reads Ch.1 input signal in %RH or demand to humidifier. (0-100%) SNVT_switch nvoSet1_x R Analogue Value Reads Ch.1 setpoint setting.
Variable Name R=Read W=Write Description Indicates unit fault status. LonWorks SNVT nvoFault_x R Binary Value nvoHWSensor_x R Binary Value nvoNetSensor_x R Binary Value nvoDisable_x R Binary Value nvoSecurity_x R Binary nvoService_x R Binary Value nvoStatus_x R Binary Value Reads humidifier status. 0=standby, 1=humidifying.
Table 4. Humidifier Variable Addresses Unit #1 NHTC LINKS 2 Variable Listing Default BACnet/IP Address: 192.168.10.11; Subnet: 255.255.255.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Table 11.
Configuration Variables nviInputType_x = 1 nviNetSensor_x = 1 Control Variables nviSet1_x = Room Setpoint (0-100%) nviSet2_x = Hi-Limit Setpoint (0-100%) nviRHDem1_x = Room %RH (0-100%) nviRHDem2_x = Hi-Limit %RH (0-100%) nviDisable_x = 1 Unit Disabled = 0 Unit Enabled Readable Variables nvoStatus_x = 1 Humidifying = 0 Standby nvoService_x = 1 Service Required = 0 No Service Required nvoFault_x = 1 Fault = 0 No Fault nvoSysDemand_x = System Demand(0-100%) nvoDisable_x = 1 Unit Disabled = 0 Unit Enabled NHT
Configuration Variables nviInputType_x = 1 nviNetSensor_x = 0 Control Variables nviSet1_x = Room Setpoint (0-100%) nviSet2_x = Hi-Limit Setpoint (0-100%) nviRHDem1_x = Room %RH (0-100%) nviRHDem2_x = Hi-Limit %RH (0-100%) nviDisable_x = 1 Unit Disabled = 0 Unit Enabled Readable Variables nvoStatus_x = 1 Humidifying = 0 Standby nvoService_x = 1 Service Required = 0 No Service Required nvoFault_x = 1 Fault = 0 No Fault nvoSysDemand_x = System Demand(0-100%) nvoDisable_x = 1 Unit Disabled = 0 Unit Enabled NHT
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10-20 START-UP 10-20 Page 1 2008-02-18
(1) NORTEC LINKS 2 START-UP CHECKLIST WIRING Humidifier-to-Humidifier Connection: Each individual humidifier linked to lead unit. Connection must be daisy-chained to other units. BMS Network Connection: Lead unit wired to BMS system (Twisted Pair or Ethernet). Network activity verified. Controls Wired: Directly to humidifiers or through BMS network. (2) START-UP PROCEDURE (1) Ensure power is being supplied to the humidifier, Nortec Links Module and Nortec OnLine module.
10-30 TROUBLESHOOTING 10-30 Page 1 2008-02-18
(1) TROUBLESHOOTING (1) When troubleshooting the communication process for OnLine and/or LINKS 2 modules should be kept in mind. Humidifier data is first received by the Nortec OnLine module using the modbus protocol over the serial port connection. It then forwards this data, via modbus/TCP, to the LINKS 2 module over an Ethernet link.
Module Status RX – Receive LED Serial Port Activity Power LED Ethernet Activity Ethernet Link TX – Transmit LED Figure 1. OnLine Diagnostic LED Locations Figure 2. BACnet Module LED Lon Device Status RX – Receive LED Power LED Ethernet Activity Ethernet LINKS 2 TX – Transmit LED Figure 3. LonWorks Module LED 10-30 Page 3 2008-02-18 Figure 4.
Table 1. OnLine Diagnostic LED Description LED Name Module Status Serial Port Activity Ethernet Activity/Collision Ethernet Link Color Function Off Indicates that the Online module is not receiving power. Green Indicates the Online module is operating normally. Orange Indicates that the Online module is loading the firmware installed on the module. Flashing Green Indicates that the Online module is receiving a network packet from a serial connection.
Table 2. LINKS 2 Module Diagnostic LEDs LED Name Color Function Module Power Off Indicates that the Online module is not receiving power. Green Indicates the Online module is operating normally. Receive LED (marked as Rx on processor board) Flashing Green Indicates that the Online module is receiving a network packet from a serial connection. Transmit LED (marked as Tx on processor board) Flashing Green Indicates that the Online module is transmitting a network packet on a serial connection.
Table 3. Troubleshooting Communication Problems Problem 1. The BMS network cannot read/write any information to any of the networked humidifiers Solution Verify that the network connection is made and is connected properly. Verify that the correct network settings are being used. The LINKS 2 module may need to be restarted to load the new settings. Check the Serial Port Activity LED on the Nortec OnLine module to ensure proper communication with the humidifiers.
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Table 1.
Figure 1. BACnet or N2 Module Figure 2. LonWorks Module Figure 3. OnLine Module Figure 4.
Figure 5.
10-50 TECHNICAL 10-50 Page 1 2008-02-18
To Units 2 to 8 A B Nortec LINKS 2 Terminal Strip (Unit 1) Shield Net Net + External wiring ‘by others’ - 18 to 24 AWG stranded - Twisted pair, shielded External Internal J5 1 RJ-45 RJ-12 J3 Nortec OnLine Module NHTC Processor Board J4 Nortec LINKS 2 Module RJ-45 J1 EIA-232 Serial Port J2 DC Power Supply 9 VDC Input +9V on center pin 1 2 3 4 5 LAN Ports 5-Port Ethernet Switch 24 VAC HOT AC GND DC GND 9 VDC OUT Note: Use open LAN port when employing an internet connection for BACne
External wiring ‘by others’ - 18 to 24 AWG stranded - Twisted pair, shielded To BMS Network A B Nortec LINKS 2 Terminal Strip (Unit 1) Shield Net Net + To Units 2 to 8 External Internal J5 1 RJ-45 RJ-12 J3 Nortec OnLine Module NHTC Processor Board J4 Nortec LINKS 2 Module RJ-45 J1 EIA-232 Serial Port J2 LonWorks Service Pin DC Power Supply 9 VDC Input +9V on center pin 1 2 3 4 LAN Ports 24 VAC HOT 4-Port Router AC GND WAN Port DC GND 9 VDC OUT Note: Use Router WAN port when em
External wiring ‘by others’ - 18 to 24 AWG stranded - Twisted pair, shielded To BMS Network A B Shield Net Net + Nortec LINKS 2 Terminal Strip (Unit 1) To Units 2 to 13 External Internal J5 1 RJ-12 J3 Nortec LINKS 2 Module Nortec OnLine Module NHTC Processor Board RJ-45 RJ-45 EIA-232 Serial Port J4 J1 J2 DC Power Supply 9 VDC Input +9V on center pin 1 2 3 4 LAN Ports 24 VAC HOT 4-Port Router AC GND WAN Port DC GND 9 VDC OUT User Interface Ports Note: Use Router WAN port when
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WARRANTY (1) WALTER MEIER INC. and/or WALTER MEIER LTD. (hereinafter collectively referred to as THE COMPANY), warrant for a period of two years after installation or 30 months from manufacturer’s ship date, whichever date is earlier, that THE COMPANY’s manufactured and assembled products, not otherwise expressly warranted (with the exception of the cylinder), are free from defects in material and workmanship.
INSTALLATION DATE (MM/DD/YYYY) MODEL # SERIAL # U.S.A. Walter Meier (Climate USA) Inc. CANADA Walter Meier (Climate Canada) Ltd. 826 Proctor Avenue Ogdensburg, NY 13669 TEL: 1-866-NORTEC-1 EMAIL: northamerica.climate@waltermeier.com WEBSITE: www.humidity.
