Nortec LINKS 2 NHRS User Manual
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2538480-C | 21 FEB 2012
LINKS 2
NHRS/DI/SC
Installation and
Operation Manual
Includes installation, operation
maintenance and troubleshooting
information for your NHTC Nortec
Links2 Options.
INSTALLATION DATE (MM/DD/YYYY)
MODEL #
SERIAL #
Thank you for choosing NORTEC.
Proprietary Notice
This document and the information disclosed herein are proprietary data of Nortec Humidity Ltd. Neither this
document nor the information contained herein shall be reproduced used, or disclosed to others without the
written authorization of Nortec Humidity Ltd., except to the extent required for installation or maintenance of
recipient’s equipment.
Liability Notice
Nortec does not accept any liability for installations of humidity equipment installed by unqualified personnel or
the use of parts/components/equipment that are not authorized or approved by Nortec.
Copyright Notice
Copyright 2012, Nortec Humidity Ltd. All rights reserved.
Contents
1 Installation
1 Overview
1 Bracket Installation
2 Retrofit Insallation of a NHRS
Links 2 Package
3 Mount the Links 2 Assembly
4 Wiring the Nortec Links 2 Module
9 Multi-Unit Systems (Master /
Slave)
9 Wiring
11 Network Integration
12 Retrieving XIF File Instructions
15 Variable Definition
26 Startup Check List
27 Troubleshooting
27 Indicator Lights
32 Replacement Parts
36 Wiring Diagrams
Overview
Protocol
BACnet MS/TP
BACnet / IP
Johnson N2
LonWorks
The NHRS Nortec Links2 Option allows for the integration of a NHRS Series humidifier within a
BACnet, Johnson N2 or LonWorks network and allows those units to be concurrently 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.
The following protocol options are available, and must be specified at time of order:
Table 1: Protocol Options
The Nortec Links2 package also includes Nortec OnLine. Nortec OnLine is an advanced web
monitoring package that allows authorized users to remotely monitor humidifier status and
performance from anywhere with an internet connection. Nortec OnLine is available with an
optional service that, among other things, includes factory technicians monitoring the units
weekly. Even if the OnLine service is not ordered, the units can still be connected to an viewed
online at www.norteconline.com For information specifically related to Nortec OnLine consult the
accompanying OnLine manual or your local representative.
Bracket Installation
Links2 can be factory installed inside of the humidifier if the package is included at time of order.
If this is the case, skip ahead through his section.
Links2 can also be retrofit to existing units. The following section explains how to install the
Links2 bracket inside of the humidifier.
Installation | 1
Retrofit Installation of a NHRS Links2 Package
Figure 1. Component Identification
LAN Router
or Switch
OnLine
Module
LINKS 2
Module
Router Power
Supply
BACNET, LONWORKS And N2 Modules:
2 | Installation
Mount The Links2 Assembly
Figure 2. Hook Position
Figure 3. Assembly Mounting Location
Hook
Position
Screw
The Nortec Links2 assembly mounts on the top, right corner of the electrical compartment.
Ensure that the rear, upwards facing hook engages the proper cooling louver at the back of the
humidifier cabinet.
1. Fasten the bracket assembly to the humidifier ‘top’ using the 3 8-32 X ½” self-tapping screws
provided with the kit.
Installation | 3
Wiring The Nortec Links2 Module
Most of the wiring connections for the new Nortec Links2 module will have already been finished
at the factory, however, there is an additional Logic Card that must be installed. Refer the LINKs 2
wiring diagram included in the package for added details.
Module Power Connections
There will be a wire harness provided that will consist of a red and blue wire. Both red and blue
wires are terminated ring terminals. Cut the terminals off and strip off 1/8” insulation on the end.
1. The red wire is to be connected to the left side of contact #1 (24v) on the main terminal strip.
The blue wire is to be connected to the left side of contact #3 (ground) on the main terminal
strip.
4 | Installation
Figure 4. Humidifier Main Terminal Strip
Humidifier Communication Connection
1. Locate the main PCB board inside the humidifier
2. Connect the 10 pin end of ribbon cable to the COM port.
Figure 5. COM Port
3. Route the ribbon cable through the punch out on the humidifiers front electrical panel
Figure 6. Routing Ribbon Cable
Installation | 5
4. Connect the ribbon cable 20 pin side to the Logic Card.
20 pin connection
Figure 7. 20 Pin connection for Ribbon Cable
5. Configured dipswitch settings according to MODE1 printed on card (485<>TTL)
6 | Installation
Figure 8. Dipswitch settings for Logic Card
6. Route the RJ-11 cable through the same punch out as the ribbon cable and connect it to the
corresponding jack on the logic card
Figure 9. RJ-11 Jack Location on Logic Card
7. Mount logic card with nylon standoffs and screws to humidifier using the 4 pre-drilled holes
Figure 10. Pre Drilled Holes for Logic Card
Installation | 7
Configuring The Humidifiers
1. Since Nortec Links2 can connect to a maximum of 8 units, it will be necessary to set the unit
address for each humidifier. The lead unit can be determined by the presence of the Links
module. The slave humidifiers can be given a unit address according to the number the unit
will have on the networked chain.
2. To access the menu settings, press the Up and Down arrows at the same time
3. Scroll up or down to find the Modbus heading
4. Set the appropriate Modbus address according to the unit ordering.
5. Place the appropriate Unit Identifier label on each humidifier. These labels should be placed
on the unit where the electrical control punch-outs are located at the top of the humidifier.
6. Connect the slave humidifiers (if applicable) to the Nortec Links Module. A twisted pair cable
should be used so that the Net (+) terminal on the Links2 module should connect to the Net
(+) terminal on the slave unit. The Net (–) terminal on the module should be connected to the
Net (–) terminal on the slave unit. Refer to the Links2 wiring diagram for more information.
7. Ensure shield wiring matches the following pattern if distance between humidifiers is
significant:
8 | Installation
Multi-Unit Systems (“Master/Slave”)
Protocol
Signal
Type
Polarity
Recommended
Cable
Maximum Recommended
Distance from NORTEC
Module
A
B
BACnet MS/TP
EIA-485,
2-wire
Net +
Net -
18-24 AWG
Shielded, Twisted
Pair
120 Impedance
2000 ft
Johnson N2
LonWorks
FTT-10
2-wire
Tx Rx
18-24 AWG
Twisted Pair
120 Impedance
Should not exceed 50 ft.
BACnet/IP
LAN
standard
N/A
N/A
CAT.5E cable with
RJ-45 termination
Depends on cable
manufacturer
Up to 8 humidifiers can be chained and monitored through a single Links2 package. In this
configuration, the unit with the Links2 package is designated the “Master Unit”, while the
remaining 7 humidifiers are configured as “Slaves”. The master unit is connected to the Building
Management Systems (BMS). Each unit is separately addressed, it is possible to monitor and
control each unit individually.
Different networking configurations may be achieved depending on the type of network being
used. One networking example could have a Gateway installed inside the lead unit, which could
then be daisy-chained to successive units. In turn, the lead unit would connect to a Building
Management System (BMS) network via a shielded, twisted-pair connection. Please see wiring
section for additional detail. A second example could have a series of units directly connected to
an Ethernet network. This is only possible for BACnet communication and is essentially referred to
as a BACnet/IP configuration.
Wiring
BACnet MS/TP, Johnson N2, and LonWorks
Links 2 is pre-installed and factory wired. Connections must be made between the master
humidifier and the BMS, and the master humidifier and any slaves that may be present.
Connections to the BMS are through terminals A and B on the Links 2 terminal strip for BACnet
MS/TP, Johnson N2, and LonWorks. The shields should also be connected. Refer to the wiring
diagrams in this manual.
Table 2 refers to the recommended wire types and maximum recommended lengths from the
Nortec Links2 module to the Building Management system. Communication between the
humidifiers and Nortec Links2 will occur via a EIA-485 signal type. Nortec recommends using a
18-24 AWG shielded, 120 twisted pair wire between the lead humidifier and each of the slave
humidifiers. Total cable length runs between the Nortec Links2 module and the furthest slave
humidifier should not exceed 2,000 feet. Signal boosters or repeaters may be necessary for
longer wire runs or where electrical noise interference is prevalent.
Table 2: Recommended Wire Types and Lengths
Installation | 9
BACnet/IP
Protocol
Default Baud Rates
BACnet MS/TP
38.4 kbps
BACnet / IP
10BaseT
Johnson N2
9.6 kbps
LonWorks
38.4 kbps
A standard CAT-5E cable with an RJ-45 (Ethernet) jack is to be connected to port 3,4, or 5 on the
gateway. Refer to wiring diagrams in this manual.
Cable Shielding
The cable’s shield should be connected to the shield terminal at the BMS system only, and not the
Links 2 module.
As well the cable shield should be connected at the lead unit only and not at subsequent units.
For long chains the shield would appear as:
Unit 2 to Master - Shield connected at master only.
Unit 3 to Unit 2 - Shield connected at unit 2 only.
Unit 4 to Unit 3 - Shield connected at unit 3 only.
And so forth.
Gateway Configuration
Links2 is configured for each protocol at the factory, prior to final testing. Baud rates are adjusted
to the following values by default:
Table 3: Baud Rates
Links2 packages require network addresses in order to communicate with a BMS system. In most
cases addresses information is factory configured during final testing. If the humidifiers were
ordered before BMS address information was available, Links2 would be figured to a default
address. Please contact the factory for the configuration tools to allow field modification of the
address parameters.
10 | Installation
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