Nortec LINKS 2 SETC B+ User Manual

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2560712-A | 14 JUL 2011

LINKS 2

GSTC/SETC
B+ Models, NHTC,
and NHRS

Installation Manual
Retrofit
Instructions

Includes retrofit instructions for B+
models of the GSTC / SETC, NHTC
and NHRS.

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 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.

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 2011, WALTER MEIER LTD. All rights reserved.

Contents

2 Field Retrofit for SETC-50

2 Installation
3 Configuring the Humidifiers

4 Field Retrofit for GSTC / SETC

B+

4 Mounting the Links 2 Assembly
5 Wiring the Nortec Links 2

Module

6 Configuring the Humidifiers

7 Field Retrofit for NHTC

7 Mount the Links 2 Assembly
9 Wiring the Nortec Links 2

Module

10 Configuring the Humidifiers

11 Field Retrofit for NHRS

11 Mount the Links 2 Assembly
13 Wiring the Nortec Links 2

Module

17 Configuring the Humidifiers

CAUTION: Servicing

 Every person working with the Nortec humidifier must read and understand the

installation and operating instructions before carrying out any work.

 Disconnect main power before any servicing.
 The control box and hydraulic unit contain high voltage components and wiring.

Access should be limited to authorized personnel only.

 Poorly maintained humidifiers can endanger health of building occupants. If the

humidifier is not properly maintained microbials may grow in it. If carried by air
passing through the humidifier the germs can cause illness.

 The humidifier must be serviced in the intervals described in the maintenance

section of this manual. Humidification boxes and mist eliminator media must be
replaced after their service life has elapsed.

CAUTION: Electrical

 All electrical work should be done according to local electrical code.
 Electrical connection to be performed by a licensed electrician.

CAUTION: Plumbing

 Plumbing to be performed by a licensed plumber.
 All plumbing work should be done according to local plumbing code.
 Unit damage caused by water quality outside of the specified ranges is not

covered under warranty.

CAUTION: Installation

 Do not mount control box or hydraulic unit on hot surfaces
 Do not mount hydraulic unit in area where freezing can occur
 Do not mount control box or hydraulic unit on vibrating surface
 Regardless of selecting On/Off or modulating control method, Nortec humidifiers

must have a closed circuit across its On/Off security loop control terminal to
operate. Nortec highly recommends the use of a high limit humidistat and an air
proving switch in series for this function.

 Walter Meier 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 Walter Meier.

Introduction

5 |

Links 2 – Field Retrofit for SETC-50 Models

Step 1 - Installation

1 Mount the Links 2 remote package in a convenient location. Note that the remote package

does not need to be mounted in close proximity to the humidifier. However, the CAT5 cable
with RJ-45 connection must reach the humidifiers connection on the keypad PCB.

Figure 1: Remote Package

Figure 2: Humidifier Keypad / Front of PCB

Links 2 Retrofit for GSTC / SETC B+, NHTC, NHRS | 2

Figure 3: Rear of PCB

2 Connect power to the 24VAC and GND terminals of the LINKS 2 terminal strip. This may be

done in one of two ways:
a A 120VAC to 24VAC plug-in transformer with screw terminals on the secondary side has

been supplied with this kit. Wire the transformer to the 24VAC and GND terminals on the
Links 2 terminal strip.

b Connect power from the humidifier terminal strip (see wiring diagram for details). Power

to Links 2 module will be lost when the humidifier is switched off.

3 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 Links module should connect to the first
pin (bottom-most pin) of the connector. The Net – terminal on the module should be

connected to the second pin of the connector. Refer to the unit’s wiring diagram for more

information.

Step 2 – Configuring the Humidifiers

Note: If the Links 2 remote package was shipped with the humidifiers, this step will have
already been performed by the factory.

1 Since Nortec Links 2 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 2 module. The slave humidifiers can be given a unit address according to the number
the unit will have on the networked chain.

2 In order to change the current modbus address, press the Menu button on the keypad.

When prompted, enter the code 0335.

3 Once the password is set select the modbus address heading and press enter. Use the up

and down arrows to change the address setting.

4 Determine the desired humidifier ordering on the network. To change the network instance

follow step 3 and enter the parameter value of 2 for unit 2, 3 for unit 3 and so on.

3 | Links 2 Retrofit for GSTC / SETC B+, NHTC, NHRS