nor-tec GS User manual

INSTALLATION MANUAL
Gas-fired Steam Humidifier
Nortec GS
2583703_EN_1608
Humidication and Evaporative Cooling
IMPORTANT! Read and save these instructions. This manual to be left with the equipment.

DANGER!
Fire or explosion hazard!
If the information in this manual is not followed
exactly, a re or explosion may result causing
property damage, personal injury or loss of life.
DO NOT store or use gasoline or other ammable va-
pors and liquids in the vicinity of this or any other
appliance.
WHAT TO DO IF YOU SMELL GAS
• DO NOT try to light any appliance.
• DO NOT touch any electrical switch.
• DO NOT use any phone in the building.
• Immediately call your gas supplier from a neighbor's
phone. Follow the gas supplier's instructions.
• If you cannot reach your gas supplier, call the re
department.

INSTALLATION MANUAL
Gas-fired Steam Humidifier
Nortec GS
2583703_EN_1608

Thank you for choosing Nortec
Installation date (DD/MM/YYYY):
Commissioning date (DD/MM/YYYY):
Site:
Model:
Serial number:
Manufacturer
Nortec Humidity Ltd.
2740 Fenton Road, Ottawa, ON, Canada K1T 3T7
Tel. 1.866.NORTEC1, Fax [phone]
[e-mail], www.humidity.com
Proprietary Notice
This document and the information disclosed herein are proprietary data of Nortec Humidity Ltd. Neither this docu-
ment, 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, operation or maintenance of
the customer's equipment.
Liability Notice
Nortec Humidity Ltd. does not accept any liability due to incorrect installation, maintenance or operation of the
equipment, or due to the use of parts/components/equipment that are not authorized by Nortec Humidity Ltd.
Copyright Notice
Copyright 2016, Nortec Humidity Ltd, All rights reserved.
Technical modication rights reserved.

vContents
Nortec GS 2583703_EN_1608
Contents
1 Introduction 1
1.1 Before You Start! 1
1.2 General 1
2 For Your Safety 3
3 Receiving and Storage 7
3.1 Inspection 7
3.2 Storage and Transportation 7
4 Product Overview 9
4.1 General Description 9
4.2 Model Designation 10
4.3 Model Specications 11
4.3.1 High Altitude De-rating 13
4.4 Options 13
4.5 Accessories 13
5 Installation 15
5.1 General 15
5.2 Installation Overview 16
5.2.1 Typical Installation – Compact Units 16
5.2.2 Typical Installation – Full-Size Units 17
5.3 Site Requirements 18
5.4 Mounting the Humidier 20
5.4.1 Clearances 20
5.4.1.1 Overall Dimensions and Weight 21
5.4.2 Standard Wall Mounting – Compact Unit Only 22
5.4.3 Standard Floor Stand Mounting – Compact Unit Only 24
5.4.4 Standard Mounting – Full-Size Unit 26
5.4.5 Optional Stand Mounting – Full-Size Unit 27
5.4.6 Mounting Checklist 28
5.5 Steam Connection 29
5.5.1 Installing the Main Steam Pipe 29
5.5.2 Best Practices for Installing Steam and Condensate Lines 30
5.5.2.1 Common Steam and Condensate Line Installation Mistakes 33
5.5.3 Steam Connection Checklist 34
5.6 Water Connections 35
5.6.1 Water Connections – Compact Unit 35
5.6.2 Water Connections – Full-Size Unit 36
5.6.3 Installing Exhaust Condensate Drain Line (CS/NX Model Only) 37
5.6.4 Water Connection Requirements 38
5.6.5 Water Connections Checklist 39
5.7 Combustion Air Connection 40
5.7.1 Space Air Installation 40
5.7.2 Sealed Combustion Installation 41
5.7.2.1 Sealed Combustion Installation Requirements 42
5.7.3 Combustion Air Checklist 42

vi Contents 2583703_EN_1608 Nortec GS
5.8 Exhaust Vent Connection 43
5.8.1 General Requirements 43
5.8.2 Exhaust Vent Installation (CS/NX Model) 47
5.8.2.1 Installation as a Category IV Appliance 48
5.8.3 Exhaust Vent Checklist 49
5.9 Gas Connection 50
5.9.1 Gas Connection, Compact and Full-Size Unit 50
5.9.2 Gas Connection Requirements 51
5.9.3 Gas Leakage Test 51
5.9.4 Gas Connection Checklist 52
5.10 Humidity Control Systems 53
5.10.1 Control Device Locations 53
5.10.2 Permissible Control Signal Inputs 54
5.11 Electrical Connections 55
5.11.1 General 55
5.11.2 Wiring Diagrams 56
5.11.2.1 Nortec GS 50/100/150/200/300 56
5.11.2.2 Nortec GS 450/600 57
5.11.3 External Connections 58
5.11.3.1 External Security Loop 58
5.11.3.2 Modulating Demand or Humidity Signal 59
5.11.3.3 On/Off Humidistat Signal 60
5.11.3.4 Full Tank Blowdown Signal Connection 60
5.11.3.5 Remote Fault PCB Connections 61
5.11.3.6 Single-Phase Power Supply Connection 62
5.11.3.7 Modbus Connection 63
5.11.4 Connecting Multiple Units Using Linkup 64
5.11.5 Electrical Connections Checklist 65
6 Product Specications 67
6.1 Weights 67
6.2 Dimensions 67
A Appendix i
A.1 Installation Checklist i

1Introduction
Nortec GS 2583703_EN_1608
1 Introduction
1.1 Before You Start!
Thank you for purchasing the Nortec GS humidier.
The Nortec GS humidier incorporates the latest technical advances and meets all recognized safety
standards. Never-the-less, improper use of the Nortec GS humidier may result in danger to the user
or third parties, and/or damage to property.
To ensure safe, proper and economical operation of the Nortec GS humidier, observe and comply with
all information and safety instructions contained in this manual, as well as all relevant documentation of
components of the installed humidication system. Comply with all local and regional regulations dealing
with gas, combustion air, ue gases, water, steam and electrical installations.
If you have additional questions, contact your Nortec representative. They will be glad to assist you.
1.2 General
Limitations
The subject of this manual is the Nortec GS humidier. The various options and accessories may only
be described in-so-far as is necessary for proper installation and operation of the equipment. Additional
information on available options and accessories can be obtained in the instructions that are supplied
with them.
This manual is restricted to the installation of the Nortec GS humidier, and is intended for well trained
personnel who are suitably qualied for their respective tasks.
Symbols Used in This Manual
CAUTION!
The catchword "CAUTION" in conjunction with the general caution symbol is used to provide safety
instructions that, if neglected, may cause damage and/or malfunction of the unit or damage to
property.
WARNING!
The catchword "WARNING" in conjunction with the general warning symbol is used to provide
safety instructions that, if neglected, may cause injury to personnel. Other specic warning symbols
may also be used in place of the general symbol.
DANGER!
The catchword "DANGER" in conjunction with the general danger symbol is used to provide safety
instructions that, if neglected, may cause severe injury to personnel or even death. Other specic
danger symbols may also be used in place of the general symbol.

2Introduction 2583703_EN_1608 Nortec GS
Other Related Publications
This manual is supplemented by other publications such as the Operation and Maintenance Manual,
Spare Parts List, etc., which are included in the delivery of the equipment. Where necessary, appropriate
cross-references to these publications have been added in this manual.
Storage of Manual
Keep this manual in a place where it is safe and readily accessible. If the equipment is moved to another
location, make sure that the manual is passed on to the new user.
If the manual is lost or misplaced, contact your Nortec representative for a replacement copy.
Language Versions
This manual is also available in other languages – contact your Nortec representative.

3For Your Safety
Nortec GS 2583703_EN_1608
2 For Your Safety
General
Every person who is tasked with the installation of the Nortec GS humidier must read and understand
this manual before performing any work on the unit. Knowing and understanding the contents of the
Installation Manual, and the Operation and Maintenance Manual is a basic requirement for protecting
personnel against any kind of danger, preventing faulty operation, and operating the unit safely and
correctly.
All labels, signs and markings applied to the Nortec GS humidier must be observed and kept in a
readable state.
Personnel Qualications
All procedures described in this manual must only be performed by personnel who are adequately quali-
ed, well trained and are authorized by the customer.
For safety and warranty reasons, any activity beyond the scope of this manual must only be performed
by qualied personnel authorized by Nortec.
All personnel working with the Nortec GS humidier must be familiar with, and comply with the appropri-
ate regulations on workplace safety and prevention of accidents.
Intended Use
The Nortec GS humidier is intended exclusively for air humidication using a Nortec-approved steam
distributor within specied operating conditions (refer to the Operation and Maintenance Manual for
details). Any other type of application, without the express written consent of Nortec, is considered to be
NOT conforming to its intended purpose, and may lead to dangerous operation and will void the warranty.
In order to operate the equipment in the intended manner all information contained in this manual, in
particular the safety instructions, must be observed closely.
Safety Precautions that Must be Observed
DANGER!
Risk of electric shock!
The Nortec GS humidier is mains powered. Live parts may be exposed when the access
panels are removed. Touching live parts may cause severe injury or even death.
Prevention:The Nortec GS humidier must be connected to the mains only after all installation
work has been completed, checked for correct workmanship, and the access panels are installed
properly and fastened securely.

4For Your Safety 2583703_EN_1608 Nortec GS
DANGER!
Risk of re or explosion!
The Nortec GS is a gas-red humidier. Improper installation, adjustment, alteration, service,
maintenance or use can cause carbon monoxide poisoning, explosion, re or other hazards
that can cause serious injury, death or property damage.
If over-heating occurs or if the gas fails to shut off: Shut off the gas supply at the manual gas
shutoff valve before shutting off the electrical power supply.
DO NOT use this appliance if any part has been under water. Call a qualied service techni-
cian immediately to inspect and replace any part of the control system or gas control that has been
under water.
Any work on the gas system must only be performed by a qualied installer, service agency or
your local gas supplier. Use only factory-authorized and listed kits or accessories when installing or
modifying this appliance.
DO NOT store or use gasoline or other ammable vapors and liquids in the vicinity of the humidier
or any other appliance.
What to do if You Smell Gas:
DO NOT try to light any appliance.
DO NOT touch any electrical switch.
DO NOT use any phone in the building.
Leave the building immediately.
Call your gas supplier immediately from a location far away from the building with the gas leak.
Follow the gas supplier's instructions.
If you cannot reach your gas supplier, call the re department.
WARNING!
Risk of severe burns from contact with hot steam vapors!
The Nortec GS humidier produces hot steam vapors for humidication. Bare skin in contact with
hot steam vapors can result in severe burns.
Prevention: Avoid contact with steam vapors, or wear appropriate personal protective equipment
when working near steam vapors.
WARNING!
Risk of severe burns from contact with hot surfaces!
The water tank, steam line and exhaust system in the Nortec GS humidier get very hot during
operation. Bare skin in contact with hot surfaces can result in severe burns.
Prevention:Shut down the humidier and wait for it to cool down to room temperatures before
touching these surfaces, or wear appropriate personal protective equipment.
Preventing Unsafe Operation
All personnel working with the Nortec GS humidier must immediately report to the customer any al-
terations to the unit that may affect safety, and secure the humidier against accidental power-up.
Modications to the Unit Prohibited
Modications are NOT permitted on the Nortec GS humidier without the express written consent of
Nortec.

5For Your Safety
Nortec GS 2583703_EN_1608
The location of the various safety labels on the Nortec GS humidier is shown in Figure 1.
Figure 1:
1
2
3
4
5
Safety Labels
1 Label, gas safety warning
2 Label, keep cabinet closed warning
3 Label, installation guidelines
4 Label, general safety warning
5 Label, specication

6For Your Safety 2583703_EN_1608 Nortec GS
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7Receiving and Storage
Nortec GS 2583703_EN_1608
3 Receiving and Storage
3.1 Inspection
All Nortec products are shipped F.O.B at the factory. All damage, breakage or loss claims are the re-
sponsibility of the shipping company.
After receiving the shipment, inspect the goods as follows:
– Inspect the shipping boxes for damage. Report any shipping box damages to the shipping company
without delay.
– Check the goods against the packing slip to ensure that all items have been delivered. Report any
shortages to your Nortec representative within 48 hours of receipt of the goods. Nortec does not
assume responsibilities for any shortages beyond this period.
– Unpack the parts/components and check for any damage.
If parts/components are damaged, notify the shipping company immediately.
– Verify the model type on the specication label to ensure that it is suitable for your installation. Refer
to Figure 3 on page 10.
3.2 Storage and Transportation
Storage
Store the Nortec GS humidier in its original packaging inside a protected area that meets the follow-
ing requirements until it is installed. These requirements also apply if the unit needs to be stored for an
extended period of time.
– Room temperature: 41 to 104°F (5 to 40°C)
– Room humidity: 10 to 75% RH
Transportation
For optimum protection always transport the unit and components in their original packaging, and use
appropriate lifting/transporting devices.
Packaging
Keep the original packaging of the unit/components for later use.
If the packaging needs to be disposed off, observe local regulations on waste disposal. Recycle pack-
aging where possible.

8Receiving and Storage 2583703_EN_1608 Nortec GS
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9Product Overview
Nortec GS 2583703_EN_1608
4 Product Overview
4.1 General Description
The Nortec GS series is a completely new design of gas-red steam humidiers. It is designed to provide
clean steam humidication at an economical price. The Nortec GS humidier is available in condensing
high-efciency (CS), ultra-low NOx condensing (NX) and standard-efciency models in capacities rang-
ing from 50 lb/h (23 kg/h) to 600 lb/h (260 kg/h). The CS and NX models are classied as Category IV
appliances.
The Nortec GS humidier comes in two housing styles – compact (50-100 lb/h (23-45 kg/h)), and full-
size (150-600 lb/h (65-260 kg/h)). Refer to Figure 2.
Figure 2:
1 2 345
Nortec GS Series Humidiers
1 GS 50/100 (compact housing)
2 GS 150 (full-size housing)
3 GS 200/300 (full-size housing)
4 GS 450 (full-size housing)
5 GS 600 (full-size housing)

10 Product Overview 2583703_EN_1608 Nortec GS
4.2 Model Designation
The specication label on the right side of the Nortec GS humidier shows its model number, serial
number and ratings – refer to Figure 3.
Figure 3: Nortec GS Humidier Specication Label
The breakdown of the model number is shown in Figure 4.
Figure 4:
Nortec GS 150-CS
Series (Gas)
Steam Capacity (lb/h):
50
100
150
200
300
450
600
Efficiency:
CS - Condensing High-Efficiency
NX - CondensingUltra-Low NOx
- Standard-Efficiency
Model Number Breakdown (Example)

11Product Overview
Nortec GS 2583703_EN_1608
4.3 Model Specications
Table 1 and Table 2 on page 12 list the specications for the Nortec GS humidier. Also, refer to "High Altitude
De-rating" on page 13 for high altitude de-rating of the Nortec GS humidier
Condensing High-efciency (CS) Model Specications
Table 1: Condensing High-Efciency (CS) Model Specications
Fuel Blower Speed Input
BTUh (kW)
Steam Capacity
lb/h (kg/h)
Manifold Pressure
in H2O (Pa)
Model GS 50-CS
Natural gas Maximum 62,000 (18.2) 50 (23) -0.01 (-2.5)
Minimum 12,400 (3.6) 10 (4.5) -0.01 (-2.5)
Propane Maximum 62,000 (18.2) 50 (23) -0.01 (-2.5)
Minimum 13,000 (3.8) 10 (4.5) -0.01 (-2.5)
Model GS 100-CS
Natural gas Maximum 124,000 (36.3) 100 (45) -0.01 (-2.5)
Minimum 24,800 (7.3) 20 (9) -0.01 (-2.5)
Propane Maximum 124,000 (36.3) 100 (45) -0.01 (-2.5)
Minimum 24,800 (7.3) 20 (9) -0.01 (-2.5)
Model GS 150-CS
Natural gas Maximum 186,000 (54.5) 150 (68) -0.01 (-2.5)
Minimum 37,200 (10.9) 30 (13.6) -0.01 (-2.5)
Propane Maximum 186,000 (54.5) 150 (68) -0.01 (-2.5)
Minimum 37,200 (10.9) 30 (13.6) -0.01 (-2.5)
Model GS 200-CS
Natural gas Maximum 248,000 (72.7) 200 (91) -0.01 (-2.5)
Minimum 24,800 (7.3) 20 (9) -0.01 (-2.5)
Propane Maximum 248,000 (72.7) 200 (91) -0.01 (-2.5)
Minimum 24,800 (7.3) 20 (9) -0.01 (-2.5)
Model GS 300-CS
Natural gas Maximum 372,000 (109.0) 300 (136) -0.01 (-2.5)
Minimum 37,200 (10.9) 30 (13.6) -0.01 (-2.5)
Propane Maximum 372,000 (109.0) 300 (136) -0.01 (-2.5)
Minimum 37,200 (10.9) 30 (13.6) -0.01 (-2.5)
Model GS 450-CS
Natural gas Maximum 558,000 (163.5) 450 (204) -0.01 (-2.5)
Minimum 37,200 (10.9) 30 (13.6) -0.01 (-2.5)
Propane Maximum 558,000 (163.5) 450 (204) -0.01 (-2.5)
Minimum 37,200 (10.9) 30 (13.6) -0.01 (-2.5)
Model GS 600-CS
Natural gas Maximum 744,000 (218.0) 600 (272) -0.01 (-2.5)
Minimum 37,200 (10.9) 30 (13.6) -0.01 (-2.5)
Propane Maximum 744,000 (218.0) 600 (272) -0.01 (-2.5)
Minimum 37,200 (10.9) 30 (13.6) -0.01 (-2.5)

12 Product Overview 2583703_EN_1608 Nortec GS
Ultra-Low NOx Condensing (NX) Model Specications
Table 2: Ultra-Low NOx Condensing (NX) Model Specications
Fuel Blower Speed Input
BTUh (kW)
Steam Capacity
lb/h (kg/h)
Manifold Pressure
in H2O (Pa)
Model GS 50-NX
Natural gas Maximum 65,000 (19.0) 50 (23) -0.01 (-2.5)
Minimum 13,000 (3.8) 10 (4.6) -0.01 (-2.5)
Model GS 100-NX
Natural gas Maximum 130,000 (38.1) 100 (45) -0.01 (-2.5)
Minimum 26,000 (7.6) 20 (9) -0.01 (-2.5)
Model GS 150-NX
Natural gas Maximum 195,000 (57.1) 150 (68) -0.01 (-2.5)
Minimum 39,000 (11.4) 30 (13.6) -0.01 (-2.5)
Model GS 200-NX
Natural gas Maximum 260,000 (76.2) 200 (91) -0.01 (-2.5)
Minimum 26,000 (7.6) 20 (9) -0.01 (-2.5)
Model GS 300-NX
Natural gas Maximum 390,000 (114.3) 300 (136) -0.01 (-2.5)
Minimum 39,000 (11.4) 30 (13.6) -0.01 (-2.5)
Model GS 450-NX
Natural gas Maximum 585,000 (171.4) 450 (204) -0.01 (-2.5)
Minimum 39,000 (11.4) 30 (13.6) -0.01 (-2.5)
Model GS 600-NX
Natural gas Maximum 780,000 (228.6) 600 (272) -0.01 (-2.5)
Minimum 39,000 (11.4) 30 (13.6) -0.01 (-2.5)

13Product Overview
Nortec GS 2583703_EN_1608
4.3.1 High Altitude De-rating
All high altitude installations have a de-rating of the input capacity. All Canadian models have an auto-
matic 10% de-rating for installations between altitudes of 2000-4500 ft (610-1372 m). For U.S. models,
refer to Table 3 for the applicable de-ratings.
Table 3: High Altitude De-rating
Altitude
De-rating (%)
Feet (ft) Meters (m)
0-2000 0-610 0
2001-3000 610-915 8
3001-4000 915-1220 12
4001-4500 1220-1370 16
4501 and higher 1370 and higher Contact factory
4.4 Options
Table 4 shows the options for the Nortec GS humidier. Contact your Nortec representative for details.
Table 4: Nortec GS Series Options
Option Application
Mounting stand Stand for independent mounting of the Nortec GS humidier on the oor.
Natural gas or propane Factory-installed gas valve for using either natural gas or propane in the Nortec GS humidi-
er.
4.5 Accessories
Table 5 shows the accessories for the Nortec GS humidier. Contact your Nortec representative for details.
Table 5: Accessories for the Nortec GS Series
Accessory Application
Steam distributor – ASD,
BSD, CSD
Steam distribution system for use in an air duct.
SAM-e steam distribution
manifold, and mini SAM-e
Steam distribution system for use in an air duct where reduced absorption distance is re-
quired.
Blower pack (remote-
mounted)
For direct room humidication or use in conditioned spaces without a built-in air distribution
system. The Nortec GS 50/100 model can use a remote-mounted blower pack for steam
distribution (blower pack ordered as an accessory).
Digital or analog control
humidistat with either On/Off
or modulating operation
Input device used to meter the output of the humidier based on the sensed relative humidity.
The humidistat can be installed in the conditioned space that is being humidied, or within
the duct.
Digital RH transducer Input device used to communicate the relative humidity in a conditioned space or a duct to
the humidier.
Digital or analog high limit
humidistat with either On/Off
or modulating operation
Input device used to limit the output of the humidier by either shutting it down or throttling it
down when the humidity in the duct approaches the high limit.
Air proving switch Input device to ensure that humidication only occurs when air is moving through the duct.
Outdoor temperature sensor Input device used to communicate the outdoor temperature to the humidistat so that it can
lower the setpoint value during cold weather to prevent condensation on exterior windows/
surfaces.

14 Product Overview 2583703_EN_1608 Nortec GS
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