Nortec BACnet User Manual

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BACnet®,
LONWORKS®

Supplemental
Installation and
Operation Manual

Using BACnet or LonWorks with
Nortec Humidifiers. Includes
installation, operation
maintenance and troubleshooting
information.

2574199 –A| 24 October 2013

INSTALLATION DATE (MM/DD/YYYY)

MODEL #

SERIAL #

CYLINDER #

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 2013, Nortec Humidity Ltd. All rights reserved
BACnet® is a registered trademark of ASHRAE.
LONWORKS® is a registered trademark of Echelon Corporation.

BACnet & LONWORKS Supplemental Install Manual | 2

Contents

Introduction 2

Requirements 2

NH-EL Wiring Connections 3

BACnet MS/TP 3

BACnet IP 4

Addressing and Communication 8

BACnet Communication Set-up 8

Control Signal Setting 9

Control Mapping 10

Options (Lonworks, BTL Certified
BACnet) 14

Field Retrofit Installation 14

Addressing and Communication 17

Control Signal Setting 17

Controller Set-up 18

BTL Certified BACnet specific :
Changing Unit Addressing 18

Changing Baud Rate (BACnet MSTP Only) 19

BACnet Pics and Bibs 19

LonWorks Variables 19

Troubleshooting 22

APPENDIX A 24

APPENDIX B 26

Warranty 30

CAUTION: Servicing

CAUTION: Electrical

CAUTION: Installation

 Disconnect main power before any servicing.

 The plumbing and electrical compartments contain high voltage components and

wiring. Access should be limited to authorized personnel only.

 During and following operation of the humidifier, the steam and components in

contact with the steam such as the blower pack, steam lines, steam distributors,
and condensate lines can become hot and can burn if touched.

 Nortec Humidity Ltd 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
Humidity Ltd.

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

 Do not mount Humidifier on hot surfaces.

 Do not mount in area where freezing can occur.

 Do not mount on vibrating surface.

 Do not mount on floor.

 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 duct high limit humidistat.

Introduction

Nortec Humidifiers equipped with the Integrated Controller (touch screen) can readily connect to
BACnet Master Slave Token Passing (BACnet MS/TP) and Internet Protocol (BACnet IP) building
management systems (BMS) right out of the box. This document describes how to connect
these humidifiers to such a network and defines the parameters that may be monitored. This
document also describes the additional options that can be purchased when interfacing with
LonWorks or BTL certified BACnet. Contact the factory for more information on other protocols
not listed in this manual.

Requirements

All NH-EL humidifiers are capable of Modbus, BACnet MS/TP and BACnet IP connectivity right
out of the box and require no additional hardware to interface with these BMS. For Modbus
specific details, consult Nortec Modbus Manual 2560599-C.

LonWorks and BTL certified BACnet systems require additional optional hardware – see Options
(Lonworks, BTL Certified BACnet) for more details.

Please note: to use the BTL certified BACnet or Lonworks protocols, the jumper J7 must NOT be
on. When the jumper J7 is on, the controller will enable the native Modbus protocol available
on BMS communication port.

BACnet & LONWORKS Supplemental Install Manual | 2

NH-EL Wiring Connections

Signal
Type

Polarity

Recommended Cable

Address

Maximum Recommended Distance
from NORTEC Humidifier

A

B

Node

ID

Device

Instance

EIA-485,
2-wire

Net - Net

+

18-24 AWG Shielded,
Twisted Pair
120  Impedance

79*

1001*

2300 ft at 9.6 kbps

2000 ft at 38.4 kbps

Using the correct wiring between the humidifier and the BACnet network is important to ensure
reliable communications and reduce the impact of electrical interference.

BACnet MS/TP

For BACnet MSTP networks, the recommended wire type is 18 -24 AWG, shielded twisted pair
wire with 120 Ohm characteristic impedance. Ensuring the correct shield terminations is
necessary to prevent electrical interference. The wire shield should be terminated at either the
humidifier or the BACnet system, but not both. This allows induced current to “drain”; if the
shield is terminated at both ends it will function as a conductor and can actually increase
electrical interference. To minimize signal loss a wire run should not exceed 2000 feet at 38.4
kbps.

Table 1: BACnet MS/TP Parameters

*Default, may vary for multi-unit orders.

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BACnet IP

Signal Type

BACnet IP

Recommended Cable

Address

Maximum
Recommended Distance
from NORTEC Humidifier

Transmission

Mode

Port

Node

ID

Device

Instance

LAN
Standard

UDP

47808

Category 5 Ethernet
Cable (CAT 5 or better)
with RJ-45 termination

79*

12*

Depends on cable
manufacturer, refer to
BMS Supplier for
recommendations

For BACnet IP networks, the recommended wire type is standard Category 5 Ethernet Cable
(CAT 5) with RJ-45 terminations (Category 5E and category 6 cable are also acceptable). Refer
to the BMS supplier for maximum recommended lengths of CAT5 cable.

Table 2: BACnet IP Parameters

*Default, may vary for multi-unit orders.

Wiring connections are made directly to the integrated controller circuit board. Figure 1:

Location of Integrated Controller Board shows the location of the board inside the NH-EL.

Figure 1: Location of Integrated Controller Board

BACnet & LONWORKS Supplemental Install Manual | 4

Figure 2: BACnet MS/TP and IP Connection Location show where the physical connections will

be made in order to interface with one of these BMS protocols. For information on Optional
protocols, such as Lonworks or BTL certified BACnet, please see Options (Lonworks, BTL
certified) for details.

Figure 2: BACnet MS/TP and IP Connection Location

Refer to , Figure 3: BACnet MS/TP Wiring Diagram and Figure 4: BACnet IP Wiring Diagram for
instructions on making wiring connections for each respective protocol.

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J15

J1

J2J3

J6

J10

J12

J14

J19

J21

J23

J16

BACnet MS/TP Port

NET
NET
COMMON

(-)

()+

NH-EL BACnet MS/TP Connection

External wiring ‘by others’

RS-485 cable recommended:

-18-24 AWG stranded

-Twisted pair, Shielded

-120 Ohm impedance

-Terminate shield at one end only

Figure 3: BACnet MS/TP Wiring Diagram

BACnet & LONWORKS Supplemental Install Manual | 6

Figure 4: BACnet IP Wiring Diagram

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