Condair 2583701-C GS Series Owner's manual

Condair 2583701-C GS Series Owner's manual
2583701_C_EN_1812_Nortec-GS_OM
IMPORTANT! Read and save these instructions. This manual to be left with the equipment.
NORTEC
OPERATION AND
MAINTENANCE MANUAL
Gas-fired Steam Humidifier
Nortec GS-Series
Humidification and Evaporative Cooling
DANGER!
Fire or explosion hazard!
If the information in this manual is not followed
exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
DO NOT store or use gasoline or other flammable vapors and liquids in the vicinity of the humidifier 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 fire
department.
OPERATION AND
MAINTENANCE MANUAL
Gas-fired Steam Humidifier
Nortec GS-Series
2583701_C_EN_1812_Nortec-GS_OM
Thank you for choosing Condair!
INSTALLATION DATE (DD/MM/YYYY):
COMMISSIONING DATE (DD/MM/YYYY):
SITE:
MODEL:
SERIAL NUMBER:
Proprietary Notice
This document and the information disclosed herein are proprietary data of Condair Ltd. Neither this document, nor
the information contained herein shall be reproduced, used, or disclosed to others without the written authorization
of Condair Ltd., except to the extent required for installation, operation or maintenance of the customer's equipment.
Liability Notice
Condair 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 Condair Ltd.
Copyright Notice
© Condair Ltd, All rights reserved.
Loctite® is a registered mark of the Henkel Corporation.
Technical modification rights reserved.
Contents
1
1.1
1.2
Introduction
Before You Start!
General
7
7
7
2
For Your Safety
9
3
3.1
3.2
Product Overview
General Description
Functional Description
13
13
15
4
4.1
4.2
4.2.1
4.2.2
4.2.3
4.2.4
4.2.5
4.2.6
4.2.7
4.2.7.1
4.2.7.2
4.2.7.3
4.3
4.3.1
4.3.2
Operator Interface
Controls
Control Software
Home Screen
General Navigational Elements
Operating Status
Maintenance and Fault Status
Help
System Information
Main Menu
Configuration Menu
Service Menu
Administrator Menu
Software Configuration
Configuring the Control Software
Configuring for Multi-Unit Operation
18
18
19
19
20
21
22
22
23
27
28
42
47
48
48
49
5
5.1
5.2
5.2.1
5.2.2
5.2.3
5.2.4
5.2.5
5.2.6
5.2.7
5.2.8
5.2.9
Operation
General
Operating Procedures
Filling the System
Ignition Safety Shutoff Test
Starting the Humidifier
Remote Monitoring
Inspections During Operation
Manually Initiate Tank Draining
Full Tank Blowdown
Shutting Down
Restarting After Shutdown
50
50
50
50
50
51
52
52
53
53
54
54
6
6.1
6.2
6.3
Maintenance
General
Mandatory Maintenance Schedule
List of Consumables
56
56
57
58
Nortec GS
2583701_C_EN_1812_Nortec-GS_OM
Contents
5
6
6.4
6.4.1
6.5
6.5.1
6.5.2
6.5.3
6.5.4
6.5.5
6.5.6
6.5.7
6.5.8
6.5.9
6.6
Management of Scale and Chloride Levels
Adjusting Blowdown Settings
Maintenance Procedures
Removal and Installation of Access Panels
Cleaning the Tank
Cleaning the Secondary Heat-exchanger
Cleaning the Float Chamber
Cleaning Hoses, Dual Fill Valves and Drain Pump
Cleaning the Burner Assembly
Replacing Backup Battery
Replacing Internal Fuse
Resetting Service Reminder
Installing Software Updates
58
59
60
60
61
64
65
66
68
70
71
72
72
7
7.1
7.2
7.3
7.4
7.5
7.6
7.7
Fault Isolation
General
Fault Indication
General Troubleshooting
Nortec GS Warning and Fault List
Resetting Fault Status
Driver Board Layout
Integrated Control Board Layout
74
74
74
75
77
86
87
87
8
Wiring Diagrams
88
9
9.1
9.2
9.3
Decommissioning
General
Removal from Service for Disposal or Long-term Storage
Disposal/Recycling
90
90
91
91
10
10.1
10.2
10.3
Product Specifications
Performance Data
Operating Data
Size and Weight
92
92
92
93
A
A.1
A.1.1
Appendix
Torque Values
Torque Sequences
94
94
95
Contents
2583701_C_EN_1812_Nortec-GS_OM
Nortec GS
1
Introduction
1.1
Before You Start!
Thank you for purchasing the Nortec GS humidifier.
The Nortec GS humidifier incorporates the latest technical advances and meets all recognized safety
standards. Never-the-less, improper use of the Nortec GS humidifier 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 humidifier, observe and comply with
all information and safety instructions contained in this manual, as well as all relevant documentation of
components of the installed humidification system. Comply with all local and regional regulations dealing
with gas, combustion air, flue gases, water, steam and electrical systems.
If you have additional questions, contact your Condair representative. They will be glad to assist you.
1.2
General
Limitations
The subject of this manual is the Nortec GS humidifier. 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 operation and maintenance of the Nortec GS humidifier, and is intended
for well trained personnel who are suitably qualified 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 specific 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 specific
danger symbols may also be used in place of the general symbol.
Nortec GS
2583701_C_EN_1812_Nortec-GS_OM
Introduction
7
Other Related Publications
This Operation and Maintenance Manual is supplemented by other publications such as the Installation
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 Condair representative for a replacement copy.
Language Versions
This manual is also available in other languages. Contact your Condair representative.
8
Introduction
2583701_C_EN_1812_Nortec-GS_OM
Nortec GS
2
For Your Safety
General
Every person who is tasked with the operation and maintenance of the Nortec GS humidifier must read
and understand this manual before performing any work. 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 humidifier must be observed and kept in a
readable state.
Personnel Qualifications
All procedures described in this manual must only be performed by personnel who are adequately qualified, 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 qualified personnel authorized by Condair.
All personnel working with the Nortec GS humidifier must be familiar with, and comply with the appropriate regulations on workplace safety and prevention of accidents.
Intended Use
The Nortec GS humidifier is intended exclusively for air humidification using a Condair-approved steam
distributor within specified operating conditions (refer to "Operating Data" on page 86 for details). Any other
type of application, without the express written consent of Condair, 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 humidifier 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: Before performing any work inside the Nortec GS humidifier shut down the humidifier
properly and secure it against accidental power-up as described in "Shutting Down" on page 48.
Nortec GS
2583701_C_EN_1812_Nortec-GS_OM
For Your Safety
9
DANGER!
Risk of fire or explosion!
The Nortec GS is a gas-fired humidifier. Improper installation, adjustment, alteration, service,
maintenance or use can cause carbon monoxide poisoning, explosion, fire 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 qualified service technician 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 qualified 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 flammable vapors and liquids in the vicinity of the humidifier
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 fire department.
WARNING!
Risk of severe burns from contact with hot steam vapors!
The Nortec GS humidifier produces hot steam vapors for humidification. Bare skin in contact with
hot steam vapors can result in severe burns.
Prevention: Never perform any work on the steam system (including the steam lines, steam distributors, etc.) while the humidifier is operating. Shut down the Nortec GS steam humidifier, as
described in "Shutting Down" on page 48 before fixing any leaks in the steam system.
WARNING!
Risk of severe burns from contact with hot surfaces!
The water tank, steam line and exhaust system in the Nortec GS humidifier get very hot during
operation. Bare skin in contact with hot surfaces can result in severe burns.
Prevention: Shut down the Nortec GS steam humidifier as described in "Shutting Down" on page 48
and wait for the components to cool down before working on the steam system.
WARNING!
Risk of severe burns from contact with hot surfaces, steam or hot water!
The tank may contain steam or hot water at up to 212 °F (100 °C). Contact with the hot
surfaces, steam vapors or hot water can result in severe burns.
Prevention: Never open the tank until it has been fully drained, and the unit has cooled down
to a safe temperature. Never use the manual drain valve until the unit has cooled down. Use
the manual drain valve to verify that the tank is empty before removing the tank cover. Drain the
tank as described in "Manually Initiate Tank Draining" on page 47.
10
For Your Safety
2583701_C_EN_1812_Nortec-GS_OM
Nortec GS
CAUTION!
Electrostatic discharge (ESD)!
The electronic components inside the control cabinet in the humidifier are sensitive to electrostatic discharge (ESD).
Prevention: Take appropriate measures to protect the electronic components inside the unit against
damage caused by electrostatic discharge (ESD). Refer to ANSI/ESD-S20.20.
Preventing Unsafe Operation
If it is suspected that the Nortec GS steam humidifier cannot be operated safely for any of the reasons
listed below, shut it down immediately as described in "Shutting Down" on page 48 and secure it against
accidental power-up.
•
Humidifier is damaged
•
Electrical connections are loose or damaged
•
Humidifier is not operating properly
•
Leaks in the steam system or gas supply
All personnel working with the Nortec GS humidifier must immediately report to the customer any alternations to the humidifier that may affect safety.
Modifications to the Unit Prohibited
Modifications are NOT permitted on the Nortec GS humidifier without the express written consent of
Condair.
Always use original Condair replacement parts and accessories available through your Condair
representative.
The location of the various safety labels on the Nortec GS humidifier is shown in Figure 1.
Nortec GS
2583701_C_EN_1812_Nortec-GS_OM
For Your Safety
11
5
1
2
3
Figure 1: Safety Labels
1
2
3
4
5
12
For Your Safety
4
Label, gas safety warning
Label, keep cabinet closed warning
Label, installation guidelines
Label, general safety warning
Label, specification
2583701_C_EN_1812_Nortec-GS_OM
Nortec GS
3
Product Overview
3.1
General Description
The Nortec GS humidifier provides clean steam humidification at an economical operating cost. It is
available in condensing high-efficiency (CS) and ultra-low NOx condensing (NX) models, in capacities
ranging from 50 lb/h (23 kg/h) to 600 lb/h (260 kg/h). It is designed for humidification through the ducts
in an air handling unit using a steam distributor. The CS and NX models are classified as Category IV
appliances.
The Nortec GS humidifier has an integrated control board which not only controls the humidifier, but also
allows the humidifier to be connected to a building automation system (BACnet, Lonworks, Modbus) or the
internet so it can be controlled and monitored remotely. In addition, up to four humidifiers can be set up
in a "Main-Extension" configuration using Condair's Linkup system to satisfy large humidification needs.
The Nortec GS humidifier comes in two different housing styles – compact and full-size. The compact
units are available in capacities of 50 lb/h (23 kg/h) and 100 lb/h (45 kg/h). The full-size units range in
capacities from 150 lb/h (65 kg/h) to 600 lb/h (260 kg/h).
Figure 2 shows the various Nortec GS series humidifier models.
1
3
2
5
4
Figure 2: Nortec GS Series Humidifier Models
1
2
GS 50/100 (compact housing)
GS 150 (full-size housing)
3
4
GS 200/300 (full-size housing)
GS 450 (full-size housing)
5
GS 600 (full-size housing)
Table 1 lists the summary of major components in each Nortec GS model. Refer to Figure 3 on page 14.
Table 1: Nortec GS Components by Model
Quantity
Component
*
Nortec GS
Nortec GS
50/100
Nortec GS
150
Nortec GS
200/300
Nortec GS
450
Nortec GS
600
Primary heat-exchanger
1
1
2
3
4
Secondary heat-exchanger
1*
1*
2*
3*
4*
Water tank
1
1
1
1
1
Burner
1
1
2
3
4
Blower
1
1
2
3
4
Gas valve
1
1
2
3
4
Ignition control module
1
1
2
3
4
Spark-igniter and flame sensor
1
1
2
3
4
Fill box
1
1
1
2
2
Dual fill valve
1
1
1
2
2
Secondary heat-exchanger on CS and NX models only.
2583701_C_EN_1812_Nortec-GS_OM
Product Overview
13
27
18
24
1
14
28
23
15
22
21
13
17
16
2
11, 12
5
25
20
8
3
9
10
19
6
7
26
4
Figure 3: Nortec GS Humidifier Components (GS 100 shown)
3.2
Note: Door, side and top panels removed for clarity.
1 Vent, exhaust
9 Valve, manual drain
2 Hose, dual fill valve to fill box
10 Panel, front
3 Inlet, gas
11 Hose, fill box to drain pump
4 Inlet, dual fill valve
12 Hose, fill box to water tank
5 Heat-exchanger, secondary
13 Hose, float chamber to water
(CS/NX models only)
tank
6 Port, drain
14 Fill box
7 Port, condensate (CS/NX mod15 Chamber, float
els only)
16 Switch, On/Off
8 Trap, condensate (CS/NX mod17 Display, touchscreen
els only)
18 Hose, fill box overflow
Functional Description
19
20
21
22
23
24
25
26
27
28
Pump, drain
Cover, water tank
Tank, water
Spark-igniter and flame sensor
Combustion chamber and primary heat-exchanger
Module, ignition control
Assembly, blower
Inlet, air intake
Outlet, steam
Switch, air proving
Refer to Figure 3 on page 14. Figure 4 on page 16 shows the general system overview.
Combustion
The combustion system consists of a fully modulating forced-draft combustion air blower(s), a negative
pressure regulated gas valve(s), and a premix burner(s). On a call for humidity, the blower is energized
to purge the system. During this time the control software performs diagnostic checks of the safety
systems – the air proving switch (not shown) and the over-temperature switch, as well as the blowers. If
the air proving switch is open, the warning message "AP Open Warn" appears, and escalates to the fault
message "AP Open Fault" if three consecutive warnings occur. At the same time, if the over-temperature
switch is open, the fault message "Over-Temperature Fault" appears. In addition, if any of the blowers fail
to operate during this time, the fault message "Blower Not Operational" appears. When the functions of
the safety systems have been verified successfully, the gas valve(s) opens and the gas-air mixture is
pushed through the burner ports into the combustion chamber(s). The spark-igniter(s) is simultaneously
activated to ignite the gas-air mixture.
14
Product Overview
2583701_C_EN_1812_Nortec-GS_OM
Nortec GS
If a flame is not sensed by the flame sensor(s), the above sequence is repeated after 15 seconds. The
sequence is repeated upto a maximum of three times, after which the ignition control module(s) locks out
and the fault message "Ignition Fail" appears. If a flame is sensed by the flame sensor(s), the gas valve(s)
remains open and combustion continues. The gas valve(s) continues to maintain a constant air-to-gas
ratio independent of the blower speed or external conditions.
On the CS and NX models, the hot flue gases pass through the primary heat-exchanger then the secondary heat-exchanger, where it is cooled further before it exits through the exhaust vent. The heat recovered by the secondary heat-exchanger is used to warm up the feed water. On the standard-efficiency
model, the hot flue gases pass through the primary heat-exchanger and exit through the exhaust vent.
Water Management
The Nortec GS humidifier is equipped with a fill box and a float chamber that monitors the water level
in the tank.
The combination fill box is connected to the tank and to the float chamber. The fill box is supplied with
water from the water supply, and from the secondary heat exchanger in CS and NX models. A vacuum
break valve is used to prevent siphoning in the drain connection.
In CS and NX models, a secondary heat-exchanger promotes higher efficiencies. This is achieved by
using the heat from the exhaust to pre-heat the cold fill water entering the fill box. Water from the fill box
then enters the bottom of the tank.
The float chamber is connected to the top and bottom of the tank to monitor water levels with reference
to the low operational pressure inside the tank. The float chamber and its control board consists of two
magnetic floats (one is a backup) that measure the water level. These levels correspond to 3 LEDs on
a display panel and are monitored by the control software.
Water Levels:
–– L5 (yellow LED) – high water level
–– L4 (green and yellow LED) – intermediate water level
–– L3 (green LED) – middle water level
–– L2 (green and red LED) – intermediate water level
–– L1 (red LED) – low water level
On initial start-up, the dual fill valves fill the tank and the float chamber. A start-up test monitors the water
level as the tank and float chamber fills, and ensures proper functioning of the unit.
Note: A fault message “Float Level” may appear at any time. This indicates an invalid combination of
readings from the control software (for example, if L5 and L1 LEDs activate at the same time).
1. The water level reaches the backup float, then the main float.
2. As water fills the float chamber and reaches the L1 level, the control software performs a test to
verify proper functioning of the dual fill valves and the drain pump.
a. Water enters the float chamber via the tank. The fill valves will allow water to fill the tank and
raise the water level in the float chamber to L5.
b. The drain pump energizes to lower the water level to just below L3.
Note: The water levels should appear in ascending then descending order; L1, L2, L3, L4, L5, L4,
L3. A fault message “Fill Check Fault” appears if the water level does not rise to level L5. A fault
message “Drain Check” appears if the water level does not drop below the level L3.
3. When the test is complete, the dual fill valves activate and the water level should rise to level L3.
4. If a demand signal is present, the humidifier begins the combustion sequence.
5. The drain pump and dual fill valves maintain the water level between levels L2 and L5.
If Float Check is enabled during steam production, the control software will activate the drain sequence
every 24 hours (adjustable to any time of day) to verify proper functioning of the floats, dual fill valves,
and the drain pump.
Nortec GS
2583701_C_EN_1812_Nortec-GS_OM
Product Overview
15
1
6
2
3
4
5
7
10
16
8
11
12
13
9
14
15
9
Figure 4: Nortec GS General System Overview
1
2
3
4
5
6
7
16
Vent, air intake – connected to
exterior (optional connection)
Steam line (rigid pipe)
Vent, exhaust
Valve, manual gas shutoff
Supply line, gas
Distributor, steam (SAM-e)
Duct
Product Overview
8
Drain line, condensate (with
trap)
9 Funnel (with trap)
10 Filter, Water (optional, but
recommended)
11 Valve, water shutoff
12 Supply line, water
13 Cables, power and control
2583701_C_EN_1812_Nortec-GS_OM
signal
14 Drain line
15 Drain line, condensate (CS and
NX models only)
16 Valve, backflow preventer (double check)
Nortec GS
4
Operator Interface
4.1
Controls
The operator interface in the Nortec GS humidifier is located on the front of the unit – refer to Figure 5. It
consists of a touchscreen display with a LED status indicator, and an On/Off switch. Refer to Table 2 for
a description of each of these elements.
1
2
3
Figure 5: Nortec GS Operator Interface
1
2
3
Display, touchscreen
Status indicator, LED
Switch, On/Off
DANGER!
Risk of electric shock!
The control cabinet in the Nortec GS humidifier has live voltage. Turning off the unit at the
On/Off switch does not shut off power to the control cabinet, which still has live voltage.
Touching live parts may cause severe injury or even death.
Prevention: Shut down the humidifier properly as described in "Shutting Down" on page 48 before accessing the control cabinet in the humidifier.
Table 2: Operator Interface Element Functions
Nortec GS
Element
Description
Touchscreen display
Allows the user to monitor or control the Nortec GS humidifier. Refer to "Control Software"
on page 18 for details of the software interface.
LED status indicator
The status LED is a multi-function LED, which lights up in different colors depending on the
operating status of the humidifier.
Green: indicates that the Nortec GS humidifier is operating normally and humidifying.
Flashing Green: indicates that the Nortec GS humidifier is in standby mode.
Yellow: indicates that a warning condition is present, or the humidifier is due for maintenance.
Red: indicates that a fault condition is present, and humidification is stopped.
On/Off switch
Allows the user to turn the Nortec GS humidifier on or off.
2583701_C_EN_1812_Nortec-GS_OM
Operator Interface
17
4.2
Control Software
The control software runs in the background and controls all the functions of the Nortec GS humidifier.
The user interacts with the control software through the screens on the touchscreen display. Details of
the screens are described in the following sections.
Note: The screens shown in this chapter are for representation purposes only, and may differ from what
is displayed on your humidifier.
4.2.1
Home Screen
When the Nortec GS humidifier is turned on, it starts initializing and performs system checks. When
initialization and system checks are completed successfully, it goes into the normal operating mode.
The Home screen then appears on the touchscreen display.
The major elements of the Home screen are shown in Figure 6.
1
10
2
3
9
4
8
7
6
5
Figure 6: Home Screen Elements
1
2
3
4
5
6
7
8
9
10
4.2.2
Date and time, current
Operating status message – refer to "Operating Status" on page 19 for details.
Humidity control information – shows the type of control signal and the steam output requested.
Service/Warning/Fault status message – refer to "Maintenance and Fault Status" on page 20 for details.
Button, <Help> – access technical support help information. Refer to "Help" on page 20 for details.
Button, <Drain> – manually initiate the drain function. Refer to "Manually Initiate Tank Draining" on page 47 for details.
Button, <About> – access the system information. Refer to "System Information" on page 20 for details.
Button, <Main Menu> – access the Main menu. Refer to "Main Menu" on page 24 for details.
Visual indication, current steam output level
Model number, Condair humidifier
General Navigational Elements
Figure 7 show the general navigational elements/features of the screens on the touchscreen display.
18
Operator Interface
2583701_C_EN_1812_Nortec-GS_OM
Nortec GS
1
2
3
4
8
7
5
9
11
6
10
12
14
13
Figure 7: General Navigational Elements and Features
1
2
3
4
4.2.3
Button, <Return> – cancel and
return to previous menu level.
Current menu/sub-menu
selection
Button, <Previous Tab> –
return to the previous tab in
the current menu/sub-menu
selection.
Button, <Next Tab> – continue/
go to the current/next tab in the
menu/sub-menu selection.
5
6
7
8
9
Tab, current
Icon, additional information –
access additional information.
Button, <Move Cursor Left> –
move the cursor to the left on
the display.
Button, <Delete> – delete the
entry.
Button, <Move Cursor Right>
– move the cursor to the right
on the display.
10 Keypad, alpha-numeric
11 Button, <Increase> – increase
the setpoint value.
12 Button, <Decrease> – decrease the setpoint value.
13 Button, <Help> – access context-sensitive help.
14 Button, <Confirm> – confirm
the change/selection. Changes
will not be stored if this button
is not pressed.
Operating Status
The operating status area of the Home screen (refer to Figure 6 on page 18) shows the current operating
status message and an associated status icon. The messages are described in Table 3, and the status
icons are described in Table 4.
Table 3: Operating Status Descriptions
Message
Description
Humidifying
The humidifier is generating steam.
Stopped
The humidifier is stopped because a condition with a "Fault" status is active.
Disabled
The Nortec GS humidifier is disabled by the BMS (building management system).
Safety Loop
One or more contacts in the external security loop is open, so the humidifier has stopped producing steam.
Idle
The humidifier is in standby mode (no humidity demand).
Idle Drain
The humidifier has been in standby mode for a number of hours. The Idle Drain Time has elapsed and the Idle Drain
function is active – the humidifier is being drained. The humidifier will automatically refill when it receives a valid
humidity demand signal.
Idle Empty
Indicates that the tank is empty during idle.
Keep Warm
The humidifier is in standby mode, and the Keep Warm function is activated.
Filling
Indicates that the tank is being filled.
Fill check
The humidifier is performing a fill check.
Drain check
The humidifier is performing a drain check.
Draining
The humidifier is draining.
Warning
A condition with a "Warning" status is active. In addition, the message "Warning" is shown in the maintenance/fault
status area of the Home screen. The humidifier will continue to produce steam when there is a demand (unless the
warning relates to a control signal).
Fault
A condition with a "Fault" status is active. The humidifier is stopped. In addition, the message "Fault" is shown in
the maintenance/fault status area of the Home screen.
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Table 4: Status Icon Descriptions
Icon
Description
The icon appears to the left of the operating status message or the maintenance/fault message when the system is working normally.
The icon appears to the left of the maintenance/fault status message when a maintenance
reminder or a condition with a "Warning" status is active. The humidifier will continue to produce steam when there is a demand (unless the warning relates to a control signal).
The icon shown appears to the left of the maintenance/fault status message when a condition with a "Fault" status is active. The humidifier stops producing steam.
4.2.4
Maintenance and Fault Status
The Service/Warning/Fault status area of the Home screen (refer to Figure 6 on page 18) shows maintenance reminders, warning and fault status messages along with associated status icons. This field also
allows access to the "Service Menu". When a maintenance reminder, warning or fault status message is
active, the list of current faults/warnings can be accessed directly from this field to view additional details.
The general maintenance reminders and alarm messages displayed in this area are described in Table 5,
and the status icons are described in Table 4. Refer to "Nortec GS Warning and Fault List" on page 71 for a
detailed list of warning and fault messages.
Table 5: Maintenance/Fault Status Descriptions
4.2.5
Message
Description
Service info
No faults conditions present.
Maint. Warning
This maintenance reminder appears when the Service Interval time set in the control software
has elapsed. The unit can continue to operate for another 200 hours, after which a corresponding fault message appears and the unit stops operating.
Perform the required scheduled maintenance, then reset the service reminder in the Service
menu. Refer to "Maintenance Procedures" on page 54.
Warning
A condition with a "Warning" status is active. Depending on the warning condition, the
Nortec GS humidifier will continue to produce steam when there is a demand (unless the
warning relates to a control signal).
In addition, the status LED turns yellow in color.
Fault
A condition with a "Fault" status is active. Depending on the fault condition, the Nortec GS
humidifier will not produce steam until the fault condition is cleared.
In addition, the status LED turns red in color.
Help
Touch the <Help> button on the Home screen (refer to Figure 6 on page 18) to view your local technical
support help details.
4.2.6
20
System Information
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Select the <About> button on the Home screen (refer to Figure 6 on page 18) to view the system information for your Nortec GS. The tab structure for this selection is shown below.
About >
"General Tab" on page 21
"Timer Tab" on page 21
"Operational Status Tab" on page 21
"Control Status Tab" on page 22
"Features Tab" on page 22
"Networking Settings Tab" on page 23
General Tab
–– Serial Number: shows the serial number, which is also shown on
the specification label.
–– Humidifier Model: shows the model number, which is also shown
on the specification label (on the right side of the humidifier).
–– Humidifier Capacity: shows the current setting of the humidifier's
steam output capacity.
–– Software Version: shows the current version of the control software. Select the field to update the control software – refer to
"Software Settings Tab" on page 41 for details.
–– Driver Board A/B Version: shows the current version of the driver
board.
–– Graph: shows you a trend data.
–– Export Trend Data: sends the data to a connected USB drive.
Timer Tab
–– On/Off Timers: allow you to enable or disable the On/Off timer
function to permit disabling of steam production during specified
days and times.
Configuration >Features > Operation > On/Off Timers
–– Capacity Timers: allow you to enable or disable the timer function, and configure up to eight different events with different output
capacities. The event timers for the capacity set in
Configuration > Features > Operation > Capacity Timers
Operational Status Tab
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–– Output: shows the current actual steam output level of the
humidifier.
–– Operating Hours: shows the current accumulated number of hours
the humidifier has been producing steam since startup.
–– Weighted Hours: shows the number of operating hours on the unit
weighted x demand % output.
–– Average Demand: shows the time-averaged demand on the
system.
–– Service Hours: shows the service interval.
–– Est(imated) Days to Service: shows the number of days before
the unit is due for service.
Control Status Tab
–– Demand: shows the calculated demand for the unit as a percentage
of its maximum capacity.
–– Linkup: shows the humidifier's 'position' in the linkup chain. Select
to set the humidifier
–– Safety Loop: shows the current status of the On/Off devices in the
safety loop. If the loop is open, the unit will not produce steam.
–– Manual Capacity: shows the capacity limitation value as a percentage of the maximum capacity of the unit. Select the field to set a
fixed maximum output capacity.
–– Channel 1: shows the input signal for Channel 1. If configured for
demand control, it represents the demand. If configured for RH(P/
PI), it represents sensed humidity. Refer to Control Mode.
–– Setpoint Channel 1: shows the current fixed humidity setpoint
value for the unit. Select the field to adjust the setpoint value. Refer
to "PI Control Parameters Tab" on page 29 for more details.
Note: This field appears only if Control Mode is set to "RH P" or "RH PI".
–– Channel 2: shows the input signal for Channel 2. If configured for
demand control, it represents the demand. If configured for RH(P/
PI), it represents sensed humidity.
Note: This field appears only if the Control Channels is set to "Dual".
–– Setpoint Channel 2: shows the high limit setpoint value for the unit.
Select the field to adjust the value.
Note: This field appears only if Control Mode is set to "RH P" or "RH
PI", and Control Channels is set to "Dual".
Features Tab
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–– Blowdown Rate: shows the rate at which the tank is partially
drained, as a percentage of actual steam production. Refer to the
"Water Management Tab" on page 25 for more details.
–– Drain Cool: shows the configuration setting of the drain cool function.
Select the field to choose a different mode – "Off", "On" or "Smart".
Refer to the "Water Management Tab" on page 25 for more details.
–– Float Check: shows the configuration setting of the float check function. Select the field to enable or disable the function. Refer to the
"Operation Tab" on page 27 for more details.
–– Float Check Time: allows you to see and set the time of day when
the float check function will occur.
–– FTBD (Full Tank Blowdown): shows the configuration setting of
the full tank blowdown function. Select the field to enable or disable
the function. Refer to the "Water Management Tab" on page 25 for more
details.
–– FTBD Interval: shows how often a full tank blowdown will occur.
Refer to the "Water Management Tab" on page 25 for more details.
–– FTBD Time: shows the time of day when a full tank blowdown will occur. Refer to the "Water Management Tab" on page 25 for more details.
–– Time Proportioning: shows the configuration setting of the time proportioning function. Select the field to enable or disable the function.
Refer to the "Operation Tab" on page 27 for more details.
–– Idle Mode: allows you to set the idle function of the humidifier when it
is in standby mode.
–– Idle Drain Time: allows you to set the time duration the humidifier
stays in standby mode without a demand, after which the humidifier
carries out the function specified in Idle Mode.
–– Short Cycle: allows you to enable or disable a timer function that
delays steam production until the already delivered humidity can
stabilize in the conditioned environment. This feature prevents the
humidifier from flooding the environment with excess humidity from
false humidity readings.
–– Short Cycle Time: allows you to set the time duration that the unit
waits in standby mode before responding to a new demand signal.
Networking Settings Tab
–– Modbus: shows if Modbus communication is enabled.
–– Modbus Address: shows the Modbus address.
–– BACnet MSTP MAC: shows the MAC address assigned to the
humidifier.
–– IP Address: shows the IP address assigned to the humidifier.
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4.2.7
Main Menu
Select the <Main Menu> button on the Home screen to view the Main menu. The Main menu and its
contents are password-protected. Refer to Figure 8. Enter the password "0335" to access the Main menu.
0
3
5
3
Figure 8: Main Menu Access
The structure of the Main menu and its sub-menus is shown in Table 6.
Table 6: Main Menu Structure
"Main Menu" on
page 24 >
"Configuration Menu" on
page 24 >
"Features Menu" on
page 25 >
"Water Management Tab" on page 25
"Control Settings Menu"
on page 28 >
"Basic Tab" on page 28
"Operation Tab" on page 27
"PI Control Parameters Tab" on page 29
"RH Alerts Tab" on page 30
"Multi-Unit Operation Tab" on page 31
"General Menu" on
page 33 >
"Basic Tab" on page 33
"Communications Menu"
on page 34 >
"Remote Enable Tab" on page 34
"Time Date Tab" on page 33
"IP Parameters Tab" on page 34
"BMS Timeout Tab" on page 35
"Modbus Parameters Tab" on page 35
"BACnet Parameters Tab" on page 35
"Nortec Online Tab" on page 37
"Remote Fault Board" on page 37
"Service Menu" on
page 38
"Humidifier Service Tab" on page 38
"General Service Tab" on page 38
"Fault/Service History Tab" on page 39
"Diagnostics Tab" on
page 39 >
Input Diagnostics
Output Diagnostics
Relay Diagnostics
"Setpoint" on page 40
"Administrator Menu" on
page 40 >
"Password Setting Tab" on page 41
"Software Updates Tab" on page 41
"Software Settings Tab" on page 41
4.2.7.1
Configuration Menu
>
The Configuration menu lets you configure the operation of the Nortec GS humidifier. The menu and
sub-menu items are discussed below. Refer to Table 6 on page 24 for the menu structure.
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Features Menu
Each tab under the Features menu is discussed below.
Water Management Tab
–– Idle Mode: allows you to set the idle function of the humidifier
when it is in standby mode.
Options:
Idle Only – the humidifier waits indefinitely
for a demand signal.
Idle Drain – the tank is drained after Idle Drain
Time elapses without demand.
Keep Warm – the water in the tank is kept
warm while in standby mode.
Factory setting:
Idle Drain
–– Idle Drain Time: allows you to set the time duration the humidifier
stays in standby mode without a demand, after which the humidifier carries out the function specified in Idle Mode 2.
Setting range:
1-100 hours
Factory setting:
72 hours
–– Float Check: allows you to enable or disable the float check function. When enabled, the humidifier performs a float check at startup and every 24 hours (without interrupting steam production if
humidifier is operating, or in standby mode), to verify that the float
system is working properly. .
Options:
On or Off
Factory setting:
On
–– Float Check Time: allows you to set the time of day when the float
check function will occur.
–– Blowdown Rate: allows you to set the rate (as a percentage of
actual steam production) at which the tank is drained. Refer to
"Adjusting Blowdown Settings" on page 53 for additional details.
Setting range:
1-50%
Factory setting:
25%
–– Drain Cool: allows you to enable or disable the drain water cooling
function that is used to cool down the drain water before it is discharged.
Options:
On – enable the function.
Off – disable the function.
Smart – drain water cooling happens only if
the tank is hot.
Factory setting:
On
–– DWC (Drain Water Cooling) Source: allows you to select the
water source used in drain water cooling.
Options:
Internal – use the fill valve in the unit to supply water for drain water cooling setting:
Internal
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–– FTBD (Full Tank Blowdown): allows you to enable or disable the
full tank blowdown function. Depending on the water quality, this
function can be used to extend operational life and service intervals by reducing mineral build-up in the tank. When enabled, the
FTBD function performs a full drain of the tank when the weighted
runtime hours exceed the FTBD Interval. When blowdown is completed, the tank is refilled and the unit resumes normal operation.
Options:
On or Off
Factory setting:
On
–– FTBD Time: allows you to set the time of day when a full tank
blowdown will occur.
–– FTBD Interval: allows you to set the frequency of full tank blowdowns in weighted hours (equivalent to a unit operating at 100%
output). Refer to "Adjusting Blowdown Settings" on page 53 for additional details.
Setting range:
1-200 hr
Factory setting:
100 hr
–– Fill Correction 1: allows you to adjust all the parameters for the
high volume fill valve(s) to compensate for valve tolerances, as
well as site-specific conditions.
CAUTION! Do not adjust this value unless instructed to
do so by a Condair representative.
Setting range:
Factory setting:
0.1-10.0
1.0
–– Fill Correction 2: allows you to adjust all the parameters for the
low volume fill valve(s) to compensate for valve tolerances, as well
as site-specific conditions.
CAUTION! Do not adjust this value unless instructed to
do so by a Condair representative.
Setting range:
Factory setting:
0.1-10.0
1.0
–– Drain Correction: allows you to adjust all the parameters used for
draining the tank and blowdowns to compensate for drain pump
flow rates and site-specific conditions.
CAUTION! Do not adjust this value unless instructed to
do so by a Condair representative.
Setting range:
Factory setting:
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Operator Interface
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1.0
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Operation Tab
–– Manual Capacity: allows you to set the capacity limitation value
as a percentage of the maximum capacity of the unit.
Setting range:
20-100 %
Factory setting:
100 %
–– Capacity Timers: Present status of the timer controlled capacity
limitation ("On": timer controlled capacity limitation activated, "Off":
timer controlled capacity limitation deactivated).
–– On/Off Timers: Present status of the On/Off timer function ("On":
On/Off timer function activated, "Off": On/Off timer function deactivated). A warning message is displayed whenever the humidifier is
turned off via the On/Off timer.
–– Time Proportioning: allows you to enable or disable the time proportioning function, which allows the controller to operate the burners on a time-proportional sequence when the system demand is
below the minimum output of a single burner.
Options:
On or Off
Factory setting:
Off
–– Short Cycle: allows you to enable or disable a timer function that
delays steam production until the already delivered humidity can
stabilize in the conditioned environment. This feature prevents the
humidifier from flooding the environment with excess humidity from
false humidity readings.
Options:
On – the humidifier remains in standby mode
until the timer elapses even if there is a new
demand signal.
Off – disables the timer function.
Factory setting:
Off
–– Short Cycle Time: allows you to set the time duration that the unit
waits in standby mode before responding to a new demand signal.
Setting range:
0-300 s
Factory setting:
60 s
–– Exhaust in Duct: When set to ON, terminal 9 on the Low Voltage
terminal strip is monitored at all times for a 24V input. This input
behaves similarly to the security loop but is used for the on/off controls required for the Exhaust in Duct feature. At any time, if the on/
off controls open and the 24V is lost on the terminal 9 input, a E153
Exhaust in Duct Fault is generated and humidification will stop immediately. A power cycle reset is required to clear the fault. In addition
to setting the feature in the software, a jumper selection needs to be
made on the driver board. JP1 needs to be moved to position 2-3.
Options:
On or Off
Off – When set to OFF, all of the above is
ignored. JP1 should be in position 1-2..
–– Factory setting:
Nortec GS
Off
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Control Settings Menu
Control Settings menu is discussed below. Refer to the structure of the tabs in Table 6 on page 24.
Basic Tab
–– Source: allows you to select the source of incoming control/humidity signal to the humidifier.
Options:
Analog – signals from analog sensors or
humidistats connected to the humidifier's
low voltage terminal block.
Modbus – signals from BMS via the Modbus
communication protocol.
BACnet/IP – signals from the BMS via the
BACnet/IP communication protocol.
BACnet/MSTP – signals from the BMS via
the BACnet/MSTP communication protocol.
LonWorks – signals from the BMS via the
LonWorks communication protocol.
Factory setting:
Analog
–– Control Channels: select one or two control signals to control the
humidifier.
Options:
Single – single control signal.
Dual – two control signals (typically a control, plus a high limit signal).
Factory setting:
Single
–– Control Mode CH 1: select the general control mode for the
incoming control signal.
Options:
Demand – signal from an external controller.
RH P – uses the internal (proportional) controller
to interpret the sensed humidity into a demand.
RH PI – uses the internal (proportionalintegral) controller to interpret the sensed
humidity into a demand.
On/Off – control signal is from an external
On/Off humidistat.
Factory setting:
Demand
–– Limiter Mode CH2: only appears when control mode is set to
double. Allows you to set the limiter signal type.
–– Signal Type Channel 1: select the signal type of the incoming control
signal. Note: This setting is ignored if signal Source is not set to "Analog".
Options:
0-5V, 1-5V, 0-10V, 2-10V, 0-20V, 0-16V, 3.216V, 0-20mA, 4-20mA
Factory setting:
0-10V
–– Signal Type Channel 2: select the signal type for the high limit
signal. Note: This setting is ignored if signal Source is not set to "Analog".
Channel 2 applies only when Control Channels is set to "Dual".
Options:
0-5V, 1-5V, 0-10V, 2-10V, 0-20V, 0-16V, 3.216V, 0-20mA, 4-20mA
Factory setting:
0-10V
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PI Control Parameters Tab
Note: This tab appears only if Control Mode is set to "RH P" or "RH PI".
–– Setpoint Channel 1: allows you to set the humidifier to operate at
a fixed humidity setpoint value.
Setting range:
0-95% RH
Factory setting:
40%
–– Band Channel 1/2: allows you to set the proportional range for
the internal P/PI controller as a percentage of relative humidity
(% RH) within which the humidifier will modulate between 0 and
100% output. Note: Band channel 2 setting appears only if Control
Channels is set to "Dual".
CAUTION! Do not adjust this value unless instructed to
do so by a Condair representative.
Setting range:
Factory setting:
6-65%
15%
–– ITime Channel 1: allows you to set the integral time for error corrections by the internal P/PI controller.
CAUTION! Do not adjust this value unless instructed to
do so by a Condair representative.
Setting range:
Factory setting:
1-60 minutes
5 minutes
–– Setpoint Channel 2: allows you to set the high limit setpoint
value. Note: This setting appears only if Control Channels is set to
"Dual".
Setting range:
0-95% RH
Factory setting:
80%
–– Damp Channel 2: allows you to set the time duration after which
the high limit setpoint value takes control of the demand signal.
Note: This setting appears only if Control Channels is set to "Dual".
Setting range:
1-60 seconds
Factory setting:
5 seconds
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RH Alerts Tab
Note: This tab appears only if Control Mode is set to "RH P" or "RH PI".
–– RH Alerts: allows you to enable or disable the alert function that
warns if sensed humidity is too high or too low.
Options:
On – enables the function.
Off – disables the function.
Factory setting:
Off
Note: The following settings are only available if the RH Alerts function is enabled.
–– RH High: allows you to set the upper limit value of the humidity
sensor signal. The RH High warning message is triggered when the
signal value exceeds this limit.
Setting range:
20-95%
Factory setting:
75%
–– RH Low: allows you to set the lower limit value of the humidity
sensor signal. The RH Low warning message is triggered when the
signal value drops below this limit.
Setting range:
20-95%
Factory setting:
20%
–– Sensor Min: allows you to set the minimum signal value of the
humidity sensor. If the signal value drops below this setting, the
sensor is assumed to be damaged or disconnected. The RH Signal
warning message is triggered when the signal value drops below
this limit, and humidification stops.
Setting range:
1-10%
Factory setting:
5%
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Multi-Unit Operation Tab
–– Linkup: allows you to enable or disable the Linkup function, which
allows up to six humidifier to connect and operate together from
a single set of control signals. It also allows you to designate the
humidifier to operate as a "Main" or "Extension" unit.
Options:
Main – designated as the main (master) unit.
Ext 1-5 – designated as the first extension
unit, second, third, fourth, or fifth extension
unit.
Off – disables Linkup. The humidifier performs as a single unit.
Factory setting:
Off
Note: The remaining settings in this tab and the next are only available on the main unit when the Linkup function is enabled.
–– Linkup Units: allows you to set the number of humidifiers in the
Linkup chain.
Setting range:
1-6
Factory setting:
1
–– Linkup Type: allows you to select the mode of operation of the
humidifier in the Linkup chain.
Options:
Parallel – the humidity demand (from a single
zone) is distributed evenly on all humidifiers
in the Linkup chain.
Series – the main unit operates to its maximum capacity, and as demand increases the
extension units generate steam in sequential
order. Each unit scales steam production in
small increments. Series setting maximizes
turndown.
Factory setting:
Series
–– Sequence Rotation: allows you to enable or disable the function
that manages the starting order to balance operating hours of all
linked humidifiers. Note: This setting is available only if Linkup Type
is set to "Series".
Options:
On or Off.
Factory setting:
On
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Multi-Unit Operation Tab, continued...
–– Sequence Interval: allows you to set the time interval used by
the control software to establish a new operating sequence to
balance operating hours of linked humidifiers. Note: This setting is available only if Sequence Rotation is enabled.
Setting range:
24-1000 hours
Factory setting: 24 hours
–– Linkup Timeout: allows you to set the maximum time limit
that the units in the Linkup chain can operate without communication to each other before a timeout warning message is
generated.
Setting range:
60-120 seconds
Factory setting: 60 seconds
–– Zero Out: shows the percentage value of the system demand
signal at which the unit is switched on.
Setting range:
0-100%
Factory setting: 0%
Note: This setting can only be modified if more than one unit is
physically connected to the Linkup chain.
–– Full Out: shows the percentage value of the system demand
signal at which the unit achieves 100% demand.
Setting range:
0-100%
Factory setting: 100%
Note: This setting can only be modified if more than one unit is
physically connected to the Linkup chain.
Refer to "Features Tab" on page 22 for setup procedure.
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General Menu
Each tab under the General menu is discussed below. Refer to Table 6 on page 24 for the menu structure.
Basic Tab
–– Date: allows you to set the current date in MM/DD/YYYY or DD/
MM/YYYY format depending on the Date Format setting.
–– Time: allows you to set the current time in 12-hour or 24-hour format depending on the Clock Format setting.
–– Language: allows you to select the language displayed on the
touchscreen display.
Options:
English, German, French, Italian, Spanish,
Dutch, Danish, Finnish, Swedish, Polish,
Czech, Hungarian, Russian, Japanese or
Chinese
–– Units: allows you to select the units of measurement.
Options:
Imperial or Metric
–– Contrast: allows you to set the contrast level of the touchscreen
display.
Setting range:
1 (low) - 31 (high)
Factory setting:
8
–– Brightness: allows you to set the brightness level of the touchscreen display.
Setting range:
1 (black) - 100 (white)
Factory setting:
52
–– LED Brightness: allows you to adjust the brightness of the LEDs.
Setting Range:
1-100
Factory setting:
50
Time Date Tab
–– Date Format: allows you to select the date format.
Options:
MM/DD/YY or DD/MM/YY
Factory setting:
MM/DD/YY
–– Clock Format: allows you to select the time format.
Options:
12 hour or 24 hour
Factory setting:
12 hour
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Communications Menu
Each tab under the Communications menu is discussed below. Refer to Table 6 on page 24 for the menu
structure.
Remote Enable Tab
–– Allow Remote Disable: allows you select whether steam production by the humidifier can be remotely disabled via the BMS.
Options:
Yes – remote disable permitted.
No – remote disable not permitted.
Factory setting:
Yes
IP Parameters Tab
The following settings are used only for communications via the integrated BACnet IP protocol and web pages.
–– IP Type: allows you to select how the IP address settings are
assigned.
Options:
DHCP – automatically acquire network address settings. Note: After five unsuccessful
attempts to acquire the address, the system
will revert to Fixed assignment.
Fixed – manually configure the network address and settings.
Factory setting:
DHCP
–– IP Address: allows you to manually set the IP address. Set the IP
address only if IP Type is set to "Fixed".
–– Subnet Mask: allows you to manually set the IP subnet mask for
the IP network. Note: Set the subnet mask only if IP Type is set to
"Fixed".
–– Default Gateway: allows you to manually set the default gateway
for the IP network. Note: Set the default gateway only if IP Type is
set to "Fixed".
–– Primary DNS: allows you to manually set the primary DNS
(domain name server) for the IP address. Note: Set the primary
DNS only if IP Type is set to "Fixed".
–– Secondary DNS: allows you to manually set the secondary
DNS (domain name server) for the IP address. Note: Set the
secondary DNS only if IP Type is set to "Fixed"
–– MAC Address: displays the MAC (media access control) address for the Nortec GS humidifier.
–– Host Name: displays the host name for the Nortec GS
humidifier.
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BMS Timeout Tab
–– BMS Timeout: allows you to set the maximum time the humidifier
will wait without any communications from the BMS network before
a timeout warning is generated.
Setting range:
1-300 seconds
Factory setting:
300 seconds
Modbus Parameters Tab
–– Modbus: allows you to enable or disable the Modbus communications protocol. Enabling or disabling Modbus always requires a
power cycle of the unit.
Options:
On or Off
Factory setting:
On
The following settings appear only if Modbus is enabled.
–– Modbus Address: allows you to set the Modbus address of the
humidifier on the network.
Setting range:
1-247
Factory setting: 10
–– Parity: allows you to set the parity bit for the data transfer.
Options:
None, Even or Odd
Factory setting: Even
–– Baudrate: allows you to set the baudrate for the data transfer.
Options:
110, 300, 600, 1200, 2400, 4800, 9600,
19200, 38400, 57600, 76800 or 115200
Factory setting: 9600
BACnet Parameters Tab
–– BACnet: allows you to enable or disable the BACnet communications protocol. Enabling or disabling BACnet always requires a
power cycle of the unit.
Options:
BACnet/IP – enables BACnet/IP over the
RJ45 (Ethernet) interface.
MSTP – enables BACnet MSTP over the
RS485 interface. Note: The Nortec GS humidifier is a slave-only BACnet MSTP device.
Off – disables BACnet communications
protocol.
Factory setting:
Off
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BACnet Parameters Tab (continued)
The following settings appear only if BACnet is set to "BACnet/IP" or
"MSTP".
–– Device Name: allows you to assign a name to the humidifier for
communications over the BACnet/IP protocol.
–– MSTP Mode: Master or Slave
When set to BACnet MSTP the Nortec GS humidifier communicates as a BACnet slave only. BACnet master functionality
requires installation of optional hardware.
–– Baud Rate: Determines the speed of data transmission for
communication on the Modbus network. The higher the value,
the more its per second is transferred.
–– Device Description: allows you to enter a description for the
humidifier.
–– Device Location: allows you to enter the location of the
humidifier.
–– Node ID: allows you to assign a node ID to the humidifier for
communications over the BACnet/IP protocol.
Setting range:
1-9999999
Factory setting: 1001
–– BACnet IP Port: allows you to assign a IP port number for the
humidifier.
Setting range:
1-65535
Factory setting: 47808
–– BACnet MSTP MAC: allows you to assign a MSTP MAC address for the humidifier.
Setting range:
128-254
Factory setting: 128
–– Foreign Device: Determines the speed of data transmission.
The higher the value, the more its per second is transferred.
When Foreign Device is ON, BBMD IP Port, IP Address, and
Re-Register Time appears.
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Nortec Online Tab
–– Nortec Online: provides web-based remote monitoring. This
operation operates in conjunction with a server at Condair's facilities and allows the user to monitor and control various aspects of
humidifier operation, such as diagnostics and trend data, and send
email notifications for service/fault warnings.
Options:
Enabled – connects to Nortec Online.
Disabled – prevents connection to Nortec Online
–– Online Status: shows the current connection status to Nortec Online
–– PIN: shows the PIN generated by the server. The PIN is required to
register the unit on the Nortec Online server.
–– Serial Number: shows the serial number of the humidifier (that
was registered online)
–– JID: shows the Jabber ID of the humidifier. This ID is used by the
server to identify the humidifier.
Network Time
(available when Nortec Online is enabled)
–– Time Zone: Sets the time zone the humidifier is installed in, and
the interval Nortec Online will use to check the current time.
Range:
0-0
Factory setting:
6
–– Update Interval: Set the time for logging events on the Nortec
Online server.
Range:
1-120 min
Factory setting:
60 min
Remote Fault Board
–– Indication: Alters how system warnings are generated on the
remote fault board. If warning is selected the RFB will activate the
service output on any system warning, including system notifications prior to completing automated corrective actions (ex. fill timeout). If Service is selected, the RFB will activate the service output
only for service warnings.
Options:
Warning, Service
Factory setting:
Warning
–– Safety Loop: when enabled the remote fault board will activate the
service relay upon the security loop opening
Options:
Yes, No
Factory setting:
No
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4.2.7.2
Service Menu
The Service menu lets you enter the startup code, reset the service reminder after performing scheduled
maintenance, access the fault and maintenance history lists and perform diagnostics. Refer to Figure 8
on page 24. Refer to Table 6 on page 24 for the menu structure.
Each tab under the Service menu is discussed below. The Service menu can also be accessed from the
maintenance and fault status area on the Home screen – refer to Figure 8 on page 24.
Humidifier Service Tab
–– Drain Tank: allows you to drain the tank. It can take up to 1 hour to
drain the tank using this function. A warning message is displayed asking you to confirm if you want to proceed with draining the tank. Refer
to "Manually Initiate Tank Draining" on page 47 for detailed instructions.
–– Clean Tank: allows you to flush the tank in preparation for maintenance. It can take up to 2 hours to flush and drain the tank using
this function. A warning message is displayed asking you to confirm
if you want to proceed.
WARNING!
Risk of severe burns from contact with hot steam
vapours or hot water!
DO NOT remove the tank cover until the until has cooled
down to a safe temperature and the tank is fully empty.
–– Service Interval: allows you to set the time interval between
scheduled maintenance on the unit.
Setting range:
0-3999 hr
Factory setting:
500 hr
–– Reset Service Reminder: allows you to reset the service reminder
message after performing scheduled maintenance on the unit. A
warning message is displayed asking you to confirm the reset.
CAUTION!
Risk of damage to equipment!
DO NOT reset the service reminder unless the scheduled
maintenance has been performed.
General Service Tab
–– Disable Burners: allows you to view the Burners tab (not shown)
so you can enable or disable individual burners in the unit.
–– Burner "n": allows you to enable or disable the individual burner; where "n" represents the burner number (1 to 4, depending
on the number of blowers in the unit).
Options:
On or Off
Factory setting: On
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Fault/Service History Tab
Note: Make sure that Date and Time are set correctly so that fault and maintenance history events can
be correctly analyzed.
–– Fault History: allows you to view the fault history list.
–– Service History: allows you to view the service history list.
–– Reset Fault History: (contact your Condair representative) allows
you to reset the fault history. A warning message is displayed asking you to confirm the reset. All previously recorded fault history is
erased.
–– Reset Service History: (contact your Condair representative)
allows you to reset the service history. A warning message is displayed asking you to confirm the reset. All previously recorded
service history is erased.
–– Export History: allows you to send your fault and service history to
a USB device.
Diagnostics Tab
–– Input Diagnostics: allows you to access the Input Diagnostics menu and
view the following tabs which show the current status of all inputs to the integrated controller, as well as calculated parameters.
Controls Tab
–– Digital RH/Demand
Channel 1 and
Channel 2
–– FTBD
–– Exhaust in Duct
–– Safety Loop
System Tab
–– Over Temp
–– Float Low
–– A/P 1-4
–– Tank Temp
–– Float Mid
–– G/V 1-4
–– Float High
Blowers Tab
–– Blower RPM 1-4
Counters Tab
–– Primary Valve 1 and –– Secondary Valve 1
2 Count
and 2 Count
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–– Pulse Time On 1
and 2
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–– Output Diagnostics: (contact your Condair representative) allows you to access the Output Diagnostics menu to enable or disable various system components. Note: The diagnostic menu will only be displayed after you acknowledge the warning message that the humidifier will be placed in standby mode.
Output Diagnostics Tab
–– Blower Relay
–– Drain Water Cool
Valve
–– Primary Fill Valve 1
and 2
–– Secondary Fill Valve –– Freeze Valve
1 and 2
–– Blower PWM
–– Drain Pump
–– Blower RPM 1 and 2
–– Fan On
–– Ignition Mod 1-4
–– Relay Diagnostics: allows you to access the Relay Diagnostics menu to
enable or disable the relays on the remote fault board. Note: The diagnostic
menu will only be displayed after you acknowledge the warning message that
the humidifier will be placed in standby mode.
Remote Fault Board Tab
–– Running
4.2.7.3
–– Service
–– Fault
Setpoint
–– Setpoint: set the desired conditions(RH setpoint) that the humidifier must try to maintain. This setting only appears when the Control
Mode CH 1 is set to RH P or RH PI. Refer to page 28.
4.2.7.4
Administrator Menu
The Administrator menu lets you enable and disable password control, or install updates for the control
software. Refer to Figure 4 on page 32. Refer to Table 6 on page 24 for the menu structure.
Each tab under the Administrator menu is discussed below.
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Password Setting Tab
–– Setpoint Password: allows you to enable or disable password
control to modify setpoint values when the humidifier is configured
to operate on internal RH(P) or RH(PI) control.
Options:
Yes – requires password to modify setpoint values.
No – requires no password to modify setpoint values.
Factory setting:
Yes
–– Main Menu Password: allows you to enable or disable password
control to access the Main menu.
Options:
Yes – requires password to access the Main menu.
No – requires no password to access the Main menu.
Factory setting:
Yes
Software Updates Tab
–– Software Update: allows you to update the control software. A
warning message is displayed asking you to confirm the software
updating.
CAUTION! The control software will be corrupted if
updating is interrupted, which may render the humidifier
unusable.
Refer to "Installing Software Updates" on page 66 for detailed
instructions.
–– Driver A/B Update: allows you to update the driver board firmware
for steam cylinder A/B
Software Settings Tab
–– Load Contact Info Page: allows you to automatically insert contact
information (for technical support) in the unit, from a USB memory
stick. This information is shown when selecting Help on the Home
Screen. Information includes Company Name, Address, Telephone
Number, Email, and Website. Please contact your Condair representative for assistance with this.
–– Manually Load Contact Info: allows you to manually enter the
Company Name, Address, Telephone Number, Email, and Website,
that will appear when the user selects Help from the Home Screen.
–– Load Logger Definition: allows you to load a logger definition file
from a USB drive to save data (CSV file) on the USB while the unit
is functioning. A factory supplied access file is required to enable
operation. The interval between recordings can be changed from
the Engineering menu (see your Condair representative).
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4.3
Software Configuration
The Nortec GS humidifier is shipped fully configured from the factory to suit your site-specific requirements, but this can be modified as needed. This section provides the necessary instructions to reconfigure the control software.
4.3.1
Configuring the Control Software
Perform the basic setup of the control software as follows, if necessary:
1. Make sure that all control wiring and jumpers are installed as described in "External Connections"
in the Installation Manual.
2. Set up the following parameters:
•
Source – select the type of control signals to the humidifier ("Analog", "Modbus", "BACnet/IP", etc.,).
Select "Analog" if a sensor/transducer signal or a demand signal from an external P/PI (proportional)/(proportional-integral) controller is wired directly to the humidifier. Otherwise, select
an applicable digital communication protocol from the list. If your humidifier has the optional
Lonworks or BACnet (BTL) module installed, select "Modbus".
•
Control Channels – select the number of control channels.
Select "Dual" if controlling the humidifier with a high limit and a control signal; otherwise set to
"Single".
•
Control Mode – select the general control mode for the incoming control and high limit signal
("Demand", "RH P", "RH PI", or "On/Off").
Select "Demand" if the control signal is a demand signal from an external controller. Select "RH
P" or "RH PI", as appropriate, if the control signal is from a sensor/transducer. Or select "On/Off"
if the control signal is from an external On/Off humidistat.
•
Signal Type – select the signal type of the incoming control signal if Control Mode is set to "Demand",
"RH P" or "RH PI", and signal Source is set to "Analog".
Select from "0-5V", "1-5V", "0-10V", "2-10V", "0-20V", "0-16V", "3.2-16V", "0-20mA", or "4-20mA",
as appropriate for the external control device connected to Channel 1.
This concludes the basic setup of the control software.
4.3.2
Configuring for Multi-Unit Operation
Set up the control software for multi-unit operation as described below. A maximum of four humidifiers
can be set up in a "Main-Extension" configuration using Condair's Linkup system to satisfy large humidification needs.
IMPORTANT! This procedure should only be used to control multiple humidifiers that are using the
same control signal inputs from the same conditioned environment.
1. Make sure that all wiring and jumpers are installed, as described in "Connecting Multiple Units Using
Linkup" in the Installation Manual.
2. Configure the main humidifier as described in "Configuring the Control Software" on page 42.
3. Set Linkup to "Main" on the humidifier that will be designated as Main in the Linkup chain, and set up
the following parameters on it:
42
•
Linkup Units – select the total number of humidifiers in the Linkup chain. For example, if there is
one main unit and two extension units, then the total number of humidifier in the chain is 3.
•
Linkup Type – select the mode of operation of the humidifiers in the Linkup chain ("Series" or
"Parallel").
•
Sequence Rotation – enable or disable the function that manages the starting order to balance the
operating hours on each steam cylinder. Note: This setting is available only if Linkup Type is set
to "Series".
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•
Sequence Interval – set the time interval used by the control software to establish a new operating
sequence to balance the operating hours on the steam cylinders in the Linkup chain.
•
Linkup Timeout – if required, change the maximum time limit that the units in the Linkup chain can
operate without a connection to each other before they generate a Linkup Timeout warning
message.
•
Zero Out – if required, set the percentage value of the system demand signal at which the unit is
switched on.
•
Full Out – if required, set the percentage value of the system demand signal at which the unit
achieves 100% demand.
4. Set Linkup in each extension humidifier as Ext1, Ext2, ...
Note: Each extension unit must be a unique extension number.
The humidifiers in the Linkup chain are now set up to generate steam upon humidity demand.
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5
Operation
5.1
General
Personnel Qualifications
The Nortec GS humidifier must only be operated by personnel who are adequately qualified, well trained
and are authorized by the customer.
Safety
Observe all safety precautions described in "For Your Safety".
5.2
Operating Procedures
The procedures described in this section assume that the Nortec GS humidifier has been set up properly
and commissioned by a Condair technician or Condair-approved technician.
Before the Nortec GS humidifier can initiate combustion, it must be filled with water and the control
software must perform a series of functional and safety tests.
5.2.1
Filling the System
Fill the Nortec GS humidifier as follows. The control software also performs the float test to ensure that
the fill system, the water level controls and the drain pump(s) are functioning properly.
1. Close the manual gas shutoff valve in the supply line.
2. Open the shutoff valve in the water supply line.
3. Set the On/Off button on the humidifier to the On position.
The control software then energizes the dual fill valves and starts to fill the tank. When the water in
the float chamber(s) reaches the L1 level (red LED), the control software runs a series of tests on
the fill and drain system as described in "Water Management" on page 15. On successful completion of
the tests, the float chamber is filled to the L3 level (green LED), and the humidifier goes into standby
mode. This process can take approximately 10-30 minutes depending on the size of the unit.
4. Set the On/Off button to the Off position, and perform the "Ignition Safety Shutoff Test" described below.
5.2.2
Ignition Safety Shutoff Test
Perform the ignition safety shutoff test as described below:
1. Check that the manual gas shutoff valve in the supply line is still closed.
2. Make sure that the contacts of all devices connected to the external security loop are closed.
3. Set the On/Off button to the On position. The control software runs a series of tests on the fill and
drain system, and on successful completion the humidifier goes into standby mode.
4. Set the demand signal to the humidifier from the building management system (BMS) or humidistat
at 100%.
The control software energizes the blower(s) to initiate the combustion sequence. The blower(s) run
at full capacity for the pre-purge duration to purge the system. The control software then verifies the
proper functioning of the safety systems and the blowers as described in "Combustion" on page 14.
After the safety systems check is completed successfully, the ignition control module(s) is energized.
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The spark-igniter(s) attempts to fire up three times to ignite the gas-air mixture. Since the gas supply
is shut off, no flame is detected by the flame sensor(s) and the gas valve(s) is de-energized. The
red LED in the ignition control module(s) flashes to indicate a safety lockout. The warning message
"Ignition Fail" also appears on the touchscreen display after a short delay.
Note: On units with multiple burners, each burner attempts to ignite in sequence. Hence, it is important to wait for all burners to complete its cycle.
The ignition safety shutoff test is successful when no gas flows to the burner(s) when the manual
gas shutoff valve is closed.
After all burners have failed to ignite, the fault message "No Burners Available" will appear on the
display. The blowers will perform a post-purge and then shut off.
5. Power cycle the humidifier to reset the fault condition.
6. Open the manual gas shutoff valve.
5.2.3
Starting the Humidifier
Start the humidifier as follows:
1. Make sure that the tank in the humidifier is filled with water – refer to "Filling the System" on page 44.
2. Make sure that the ignition safety shutdown test is completed – refer to "Ignition Safety Shutoff Test" on
page 44.
3. Check that the shutoff valve in the water supply line is open.
4. Check that the manual gas shutoff valve in the supply line is open
5. On the CS/NX models, make sure that the condensate trap inside the unit is primed properly.
6. Check that the contacts of all devices connected to the external security loop are closed.
7. Make sure that all access panels on the humidifier are installed and fastened securely.
8. Set the On/Off button on the humidifier to the On position.
The control software then energizes the dual fill valve(s) and starts to fill the tank. It then performs
a series of tests to verify the function of the floats, the dual fill valves and the drain pump – refer to
"Water Management" on page 15. Upon successful completion of the tests, the combustion sequence
starts – refer to "Combustion" on page 14.
Depending on the system demand, the blower(s) runs faster or slower to control the input of the
burner(s). The generated heat turns the water in the tank to steam, which is then delivered to the
distribution system.
As the water level in the tank is reduced due to evaporation, the dual fill valves pulse to maintain water
at the proper level. In CS/NX models, cold fill water passes through the secondary heat-exchanger.
Here, heat from the exhaust warms up the cold fill water entering the tank before entering the fill
box. The water will then flow from the fill box into the tank.
When the humidity demand has been satisfied (demand drops below the minimum %), the gas
valve(s) is de-energized. The blower(s) then performs a post-purge of the combustion chamber(s),
and then shuts off.
If there is no humidity demand, the humidifier goes into standby mode to await the next humidity
demand signal.
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5.2.4
Remote Monitoring
The Nortec GS humidifier can be monitored remotely through the remote fault board wired to a remote
monitoring system. Table 7 describes the function of each relay when triggered.
Table 7: Remote Relay Function
Remote Relay
Description
Error
The humidifier is stopped due to a fault condition, or may be operable only for a limited period of time.
Service/Warning
Depending on the software configuration, indicates that a service
warning or a system warning/notification is active.
Unit On
The humidifier has power, and the On/Off switch is in the On
position.
The Nortec GS humidifier can also be monitored remotely from a laptop or desktop computer using
the ethernet port on the integrated control board. Contact your Condair representative for assistance.
5.2.5
Inspections During Operation
Perform regular inspection of the Nortec GS humidifier and the humidification system when it is in operation. Inspect the following:
Check the gas connection for any leaks.
Check the water, drain and steam connections for any leakages.
If applicable, check the humidifier and other system components have not shifted from their mountings, and are fastened securely.
Check for leaks in the exhaust vent. Check that there are no obstructions anywhere in the exhaust
vent, including the exhaust terminal.
Keep the area around the air intake in the unit clear of all obstructions. If an air intake vent is used,
check for leaks and obstructions in the vent, including the intake terminal.
Check the area around the unit is clear of all insulating and combustible materials.
Visually check the electrical wiring for any damage.
Check the Home screen on the humidifier for service or system warning messages.
If any irregularities (leakages, fault messages or damaged components) are found, shut down the
Nortec GS humidifier before performing service – refer to "Shutting Down" on page 48. Contact your Condair
representative if assistance is required.
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5.2.6
Manually Initiate Tank Draining
Figure 9: Drain Screens
During periods of inactivity, such as off-season or periods of low demand, drain the water from the tank.
To drain the tank in the Nortec GS humidifier, manually initiate draining as follows. Refer to Figure 9.
1. Select the <Drain> button on the Home screen. If more than one humidifier is connected in a Linkup
chain, select the appropriate tank, then press the check mark.
2. Select the <Yes> button on the confirmation screen. If humidification is in progress, it is interrupted
and the drain pump(s) empties the tank. A progress bar shows the status of the drain cycle.
Select the <Cancel> button at any time to interrupt the drain cycle. If the drain cycle is interrupted
before it is completed, open the manual drain valve and verify that there is still water in the tank.
Close the manual drain valve, then select the <No> button on the next screen to confirm that the
tank has not been emptied fully.
Note: If necessary, set the On/Off switch to the Off position at the end of the drain cycle to prevent
the humidifier from filling the tank again.
WARNING!
Risk of severe burns from contact with hot surfaces, steam or hot water!
The tank may contain steam or hot water at up to 212 °F (100 °C). Contact with the hot
surfaces, steam vapors or hot water can result in severe burns.
Prevention: Never open the tank until it has been fully drained, and the unit has cooled down to
a safe temperature. Never use the manual drain valve until the unit has cooled down. Use the
manual drain valve to verify that the tank is empty before removing the tank cover.
Note: If the control software/drain valve(s) does not function properly, wait for the unit to cool down
then open the manual drain valve and empty the tank. Failure to do so may damage drain lines that are
not rated to handle hot water at up to 212 °F (100 °C). Close the drain valve after emptying the tank.
5.2.7
Full Tank Blowdown
The control software in the Nortec GS humidifier performs a full tank blowdown to reduce the amount of
dissolved minerals accumulated inside the tank. The Drain Cool function in the control software permits
drain water cooling whenever the drain pump runs. Make sure that the function is enabled if drain cooling is required. The frequency of the blowdown can be set in the control software.
In addition to the software-controlled full tank blowdown, a separate 24 VAC signal connected to pins
"1" and "8" in the low voltage terminal strip can also initiate a full tank blowdown. When a full tank
blowdown is initiated, the tank is drained fully then refilled. Make sure the Drain Cool function is enabled
if drain cooling is required.
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5.2.8
Shutting Down
DANGER!
Risk of electric shock!
The control cabinet in the Nortec GS has live voltage. Turning off the unit at the On/Off
switch does not shut off power to the control cabinet. Touching live parts may cause severe
injury or even death.
Prevention: Before performing any work inside the humidifier or with the humidification system,
shut down the humidifier properly as described below.
Shut down the Nortec GS humidifier as follows for maintenance, or at the end of the season:
1. Set the demand signal to the humidifier from the BMS or the humidistat at 0%. Then allow the burner(s)
to shut off and the blower(s) to perform a post-purge of the combustion chamber(s).
2. Manually initiate draining of the tank. Refer to "Manually Initiate Tank Draining" on page 47.
WARNING!
Risk of severe burns from contact with hot surfaces, steam or hot water!
The tank may contain steam or hot water at up to 212 °F (100 °C). Contact with the hot
surfaces, steam vapors or hot water can result in severe burns.
Prevention: Never open the tank until it has been fully drained, and the unit has cooled down to
a safe temperature. Never use the manual drain valve until the unit has cooled down. Use the
manual drain valve to verify that the tank is empty before removing the tank cover.
Note: If the control software/drain valve(s) does not function properly, wait for the unit to cool down
then open the manual drain valve and empty the tank. Failure to do so may damage drain lines that are
not rated to handle hot water at up to 212 °F (100 °C). Close the drain valve after emptying the tank.
3. Make a note of any fault code displayed on the Home screen.
Note: At the end of the season, report the fault history to a Condair-certified technician.
Select Service > Fault/Service History tab to access the fault history.
4. Set the On/Off button to the Off position.
5. Close the manual gas shutoff valve in the supply line.
6. Close the shutoff valve in the water supply line.
7. Disconnect the power supply to the humidifier at the external disconnect switch. To prevent accidental
power-up, lockout and tag out according to the established safety practices at your facility.
WARNING!
Risk of severe burns from contact with hot surfaces!
Components of the steam system may reach 212°F (100°C) during operation. Contact
with the hot surfaces can result in severe burns.
Prevention: Avoid touching any components in the plumbing cabinet until the unit has cooled
down to a safe temperature.
8. Wait for the unit to cool down to a safe temperature before performing any maintenance inside the
plumbing cabinet.
5.2.9
Restarting After Shutdown
Restart the Nortec GS humidifier as follows after it has been shut down for maintenance or at the start
of the season:
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DANGER!
Risk of harm to personnel or damage to property.
Operating a damaged or improperly secured humidifier presents a risk of danger to personnel or damage to property.
Prevention: Do not restart a damaged or improperly secured humidifier.
1. Examine the humidifier and other system components for damage. Do not use the applicance if any
part of the humidifier has been under water. Call a qualified service technician to inspect and replace
any part of the control system or gas control that has been under water.
2. Check for loose or damaged electrical connections, and repair if necessary.
3. If applicable, make sure that the humidifier and its components have not shifted from their mountings, and are fastened securely.
4. Make sure that all condensate traps in the exhaust and steam lines are primed properly.
5. Clean any build-up of dirt around the control cabinet, the area around the burner(s). Clean the area
around the air intake inlet to prevent contaminants from being drawn into the combustion chamber.
6. Clean the air intake terminal, if the humidifier is connected to the exterior.
7. Make sure that all access panels on the humidifier are installed and fastened securely. Refer to
"Removal and Installation of Access Panels" on page 55.
8. Remove the lock and tag from the external disconnect switch, and restore power to the humidifier.
9. Open the water and gas supply to the unit.
10. Start up the humidifier as described in "Starting the Humidifier" on page 45.
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6
Maintenance
6.1
General
To ensure proper performance and long operating life of the Nortec GS humidifier, Condair recommends
inspection of the appliance and installation at least once a year by a qualified service person. The amount
and type of maintenance required is generally dependent on how much the humidifier operates. The
Nortec GS humidifier monitors the amount of steam produced over time and will indicate when service
is required. All units come with a default service interval of 1000 hours, which can be adjusted in the
control software.
The combustion air blower motors are permanently lubricated and do not require lubrication.
The gas valves in the Nortec GS humidifier are negative static pressure regulating valves. The valves are
factory-set for the correct gas type. The valve setting listed on the product rating plate is shown relative
to atmosphere – this setting will always remain constant. Contact the factory if adjustment is needed.
IMPORTANT! Tampering with the gas valve, without the express consent of Condair, will void the
warranty.
In general, the burners do not require adjustment or servicing. The combustion chamber and heatexchanger tubes are all fabricated from stainless steel, and do not require internal cleaning.
The exhaust vent connected to the Nortec GS humidifier does not require cleaning, but needs to be
inspected regularly for leaks, blockages, sagging and proper condensate removal.
For proper and safe operation of the unit, the area around the air intake in the unit must be kept clear of
all obstructions. If an air intake vent is used, it must be inspected for leaks and obstructions (including
the intake terminal).
Refer to "Mandatory Maintenance Schedule" on page 51 for other maintenance requirements. Also perform
regular inspections when the unit is operating – refer to "Inspections During Operation" on page 46.
IMPORTANT! Damage caused by use of non-approved parts is not covered by warranty. Use only
original Condair replacement parts.
Personnel Qualifications
Maintenance on the Nortec GS humidifier must only be performed by well qualified and properly trained
personnel authorized by the customer. It is the customer's responsibility to verify qualifications of the
personnel.
Safety
Make sure that the Nortec GS humidifier is shut down properly as described in "Shutting Down" on page 48,
and observe all safety precautions described in "For Your Safety" before performing any maintenance on
the humidifier.
WARNING!
Wiring errors can cause improper and dangerous operation of the humidifier!
Prevention: Tag all wires before disconnecting them. Reconnect all wires correctly after servicing,
and check the unit functions properly.
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Nortec GS
6.2
Mandatory Maintenance Schedule
Table 8 lists the mandatory maintenance schedule for the Nortec GS humidifier.
Table 8: Mandatory Maintenance Schedule
Task
30 Days
After
Initial
Start-up
Mid-Season
End of
Season
(2000 hrs)
Inspect drainage.
X
X
X
Perform a visual check of the drainage system, including the air gap
funnel and drainage into the building drain.
Initiate a manual drain (refer to "Manually Initiate Tank Draining" on
page 47), and visually check that water flows freely through the
drain.
Perform water
analysis.
–
X
X
Perform a water analysis on a semi-annual basis to ensure optimal performance. Refer to "Management of Scale and Chloride Levels" on
page 52.
Inspect tank,
primary heatexchanger coils
and drain fitting
for scale buildup.
X
X
X
Adjust Blowdown Rate and FTBD Interval, as necessary, to reduce scale
build-up.
Inspect secondary heatexchanger (CS/
NX model only)
for blockage.
–
Inspect sacrificial
anode in the
tank.
–
–
X
Inspect the anode for severe corrosion or scale build-up. Scrape off
excess scale – refer to "Cleaning the Tank" on page 56. Replace the
anode, if necessary.
Clean the float
chamber.
X
X
X
Make sure that the floats move freely. Clean the float chamber –
refer to "Cleaning the Float Chamber" on page 59.
Inspect the
hoses, fill valve
and drain pump
for blockage.
–
X
X
Check the fill and drain hoses for blockage. Clean the inside of
the hoses – refer to "Cleaning Hoses, Dual Fill Valves and Drain Pump" on
page 60.
Maintenance
Inspect the inside of the tank, and make sure that scale build-up
does not exceed 2 in (50 mm). De-scale as required. Refer to "Cleaning the Tank" on page 56.
X
X
Inspect water flow through the secondary heat-exchanger and make
sure there is not blockage. Clean, if necessary – refer to "Cleaning the
Secondary Heat-exchanger" on page 58.
Inspect the condensate trap connected to the secondary heat-exchanger for blockage. Flush and prime the condensate trap, if necessary – refer to "Cleaning the Secondary Heat-exchanger" on page 58.
Clean the strainer in the dual fill valves – refer to "Cleaning Hoses, Dual
Fill Valves and Drain Pump" on page 60.
Clean the drain pump – refer to "Cleaning Hoses, Dual Fill Valves and Drain
Pump" on page 60.
Remove dust
build-up on the
blower housing.
–
X
X
Use an air gun to remove dust accumulation on the blower housing.
Inspect the
spark-igniter for
oxidation.
–
–
X
Clean the spark-igniter – refer to "Cleaning the Burner Assembly" on
page 62 for details.
Inspect the
exhaust vent and
terminal.
X
X
X
Check that there are no leaks in the exhaust vent, and it is not damaged or corroded excessively. Check the vent is secured properly
and has the proper slope.
Make sure there is no blockage in the exhaust vent including the
exhaust terminal.
When operating in a stable state, make sure that flue temperature
is 275-300 °F (135-149 °C) for the standard-efficiency model. Flue
temperature should be 120-140 °F (49-60 °C) for CS/NX model.
Nortec GS
Inspect air
intake vent and
terminal.
–
Inspect high
limit switch and
sensor.
X
X
X
Check the air intake vent for leaks, if used.
Make sure there is no blockage in the air intake terminal, if used.
Clean the screen on the elbow at the intake air inlet.
X
X
Visually check that the thermocouple is attached to the exhaust vent,
and the thermocouple wires are connected properly to the switch.
2583701_C_EN_1812_Nortec-GS_OM
Maintenance
51
Task
Inspect condensate collection
system.
30 Days
After
Initial
Start-up
Mid-Season
End of
Season
(2000 hrs)
X
X
X
Maintenance
Check for leaks or blockages in the condensate lines throughout the
steam line and exhaust vent (if applicable).
Make sure that the condensate traps are primed.
If a condensate neutralizer is installed, follow recommendations of the
device manufacturer.
Inspect the
mounting of the
unit.
–
–
X
Check the mounting surface on which the unit is installed is stable,
and the unit is secured properly to the mounting surface.
Inspect overall
condition of the
unit.
–
–
X
Check the unit for obvious signs of deterioration.
Also perform regular inspections when the unit is operating – refer to "Manually Initiate Tank Draining" on
page 47.
6.3
List of Consumables
Table 9 shows the list of consumable items for the Nortec GS humidifier.
Table 9: Consumables
6.4
Consumable Item
Replace
Part Number
Spark igniter
After 3 seasons (6000 hours)
Refer to the Spare Parts List for kit part numbers.
Tank door gasket
After each cleaning
Sacrificial anode
When needed
All other gaskets
When removed
Management of Scale and Chloride Levels
As the humidifier produces steam, minerals dissolved in the water begin to concentrate in the tank over
time. The amount of dissolved minerals and the chloride levels need to be carefully controlled so they
do not affect the efficiency and service life of components. Hardness of water may cause foaming and
contribute to scale build-up in the humidifier tank and float chamber, and chlorides increase the risk
of stress corrosion cracking in stainless steel components of the humidifier. All of these contribute to
reduced efficiency, and increased amount of service and related maintenance costs.
IMPORTANT! Component failures due to water quality outside the recommended ranges (refer to
Table 10) are not covered by warranty.
The Nortec GS humidifier periodically drains water from the tank to reduce the concentration of dissolved
minerals that accumulate during long-term operation. This is achieved in two ways – through a partial
blowdown and a full tank blowdown (FTBD).
In a partial blowdown, a certain amount of water (determined by the Blowdown Rate setting) is drained
from the tank and replaced with fresh water, thus lowering the concentration levels. In a FTBD, the
entire tank is drained when a certain number of weighted hours (determined by the FTBD Interval setting)
have elapsed, then refilled with fresh water. Weighted hours is defined as the hours equivalent to a unit
operating at 100% output.
The humidifier is shipped with a default Blowdown Rate of 25% for the partial blowdown, and FTBD Interval
of 100 hours for FTBD. These settings ensure that concentration of dissolved minerals is minimized for
all water conditions. However, they can be adjusted in the control software once water conditions are
known for your site – refer to "Adjusting Blowdown Settings" on page 53.
In addition to the software-controlled FTBD, a separate 24 VAC signal connected to pins "1" and "8" in
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Maintenance
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Nortec GS
the low voltage terminal strip can also be used to initiate a full tank blowdown at any time.
Water Quality
The water quality requirements for the Nortec GS humidifier are shown in Table 10. Do-it-yourself kits
are available to test hardness in the feed water. You can also contact your local municipality for a water
quality report, or order a Condair water test kit.
Table 10: Water Quality Requirements
Water Type
6.4.1
Hardness
gpg (PPM)
Alkalinity (pH)
Chloride (PPM)
Potable
0-15 (0-256)
5-8
0-50
Treated
0-0.99 (0-17)
5-8
0-50
Adjusting Blowdown Settings
Due to the wide range of water quality in different locations, it is important to adjust blowdown to suit
the local water conditions. Use the following procedure to adjust the blowdown rate and FTBD interval
for the water conditions at your site.
1. Test the quality of the feed water to determine the hardness and the chloride levels.
2. Then set the blowdown rate as follows:
a. Refer to Table 11 on page 53, and make a note of the recommended minimum blowdown rate for
the hardness level of the feed water.
b. Then refer to Table 12 on page 54, and make a note of the recommended minimum blowdown
rate for the chloride level in the feed water.
c. Set the Blowdown Rate on the Nortec GS humidifier to the higher of the two noted values.
3. Set the FTBD interval as follows:
a. Refer to Table 11, and make a note of the recommended maximum FTBD interval value for the
hardness level of the feed water.
b. Refer to Table 12, and make a note of the recommended maximum FTBD interval value for the
chloride level in the feed water.
c. Set the FTBD Interval on the humidifier to the lesser of the two noted values.
4. Once the base settings are set, monitor the water quality and maintenance history periodically, and
adjust the settings accordingly.
Note: Factory tests have shown that increasing the blowdown rate reduces scale build-up, while
reducing the FTBD interval reduces the chloride concentration levels in the tank. The adjusted settings should reflect a balance between reducing concentration levels and minimizing water usage.
Table 11: Blowdown and FTBD Settings Related to Hardness of Water
Feed Water Hardness
gpg (PPM)
Recommended Minimum
Blowdown Rate (%)
Recommended Maximum
FTBD Interval (h)*
0-3.5
(0-60)
12
72
3.5-7
(60-120)
25
72
7-10.5
(120-180)
40
72
10.5-20.5
(180-350)
60
48
> 20.5
(> 350)
Not recommended for the Nortec GS humidifier without treatment of the water. Contact your local Condair representative.
* Weighted hours
Nortec GS
2583701_C_EN_1812_Nortec-GS_OM
Maintenance
53
Table 12: Blowdown and FTBD Settings Related to Chloride Levels
Feed Water
Chloride Levels (PPM)
Recommended Minimum
Blowdown Rate (%)
Recommended Maximum
FTBD Interval (h)*
5
12
72
5-15
25
72
15-25
45
48
25-40
80
24
100
12
40-50
> 50
Not recommended for the Nortec GS humidifier without treatment of the water. Contact your local Condair representative.
* Weighted hours
6.5
Maintenance Procedures
6.5.1
Removal and Installation of Access Panels
Removal
Remove the door and side panels in the humidifier as follows. Refer to Figure 10 on page 55.
1. Turn the captive screw at the bottom of the door panel (control cabinet/plumbing cabinet) counterclockwise with a screwdriver.
2. Lift up the door panel slightly so that the top tabs clear the notches in the cabinet, then carefully
swing the bottom of the panel up, as shown, and remove the panel.
3. To remove the left/right side panel, remove the screws and slide the panel towards the front of the
unit, so the tabs in the side of the panel clear the notches in the fixed rear panel.
Note: The Nortec GS 50/100 does not have a removable left side panel. To remove the right side
panel, slide the panel towards the front of the humidifier until the tabs at the top rear and bottom
rear of the panel clear the notches in the cabinet, then remove the panel.
Installation
Install the door and side panels in the humidifier as follows. Refer to Figure 10 on page 55.
1. Align and slide the side panel (left/right) towards the rear of the unit, so the tabs in the side of the
panel engage with the notches in the fixed rear panel. Install the screws and fasten the panel securely.
Note: To install the right side panel in the Nortec GS 50/100, align the tabs at the top rear and bottom rear of the panel with the notches in the cabinet, then slide the panel towards the rear of the
unit until it is seated properly.
2. Position the door panel (control cabinet/plumbing cabinet) so that the two tabs in the top rear of the
panel align with the notches in the cabinet.
3. Lower the door panel to seat the tabs in the notches, while ensuring that the tabs in the (left/right)
side panel engage with the notches in the side of the door panel. Refer to the detail in the figure.
4. Make sure that the door panel fits flush on the front and the side. Turn the captive screw in the door
panel clockwise to secure the door panel. Check that it is fastened securely.
54
Maintenance
2583701_C_EN_1812_Nortec-GS_OM
Nortec GS
11
1
10
2
7
3
4
5
6
8
9
Figure 10: Access Panels Removal and Installation (GS 150 Shown)
1
2
3
4
Nortec GS
Screw, (×4) typical
Panel, right side
Top tab, door panel
Notch, cabinet
5
6
7
8
Tab, side panel
Notch, door panel
Screw, captive
Door panel, control cabinet
2583701_C_EN_1812_Nortec-GS_OM
9 Door panel, plumbing cabinet
10 Panel, left side
11 Panel, fixed rear
Maintenance
55
6.5.2
Cleaning the Tank
Clean the inside of the tank, the outside of the primary heat-exchanger coils and the drain fitting as follows.
WARNING!
Risk of severe burns from contact with hot surfaces, steam or hot water!
The tank may contain steam or hot water at up to 212 °F (100 °C). Contact with the hot surfaces, steam vapors or hot water can result in severe burns.
Prevention: Drain the tank and allow the unit to cool down to a safe temperature before cleaning
the tank. Never open the tank until it has been fully drained. Never use the manual drain valve until
the unit has cooled down. Use the manual drain valve to verify that the tank is empty before removing the tank cover.
CAUTION!
Risk of damage to the humidifier components!
Do not use solvents, aromatized or halogenized hydrocarbons, or other harsh chemicals for cleaning. Disinfectants may only be used if they do not leave behind toxic residue. Rinse all parts thoroughly with clean tap water after cleaning.
Note: It is not necessary to remove the tank from the unit in order to clean it.
1. Use the Clean Tank function in the control software to flush and drain the tank.
2. Shut down the humidifier as described in "Shutting Down" on page 48.
3. Remove the door panels (refer to "Removal and Installation of Access Panels" on page 54) and all covers.
4. Disconnect the fill hose from the drain fitting.
5. Remove the door locks, four clamps, and the tank cover. Remove and discard the tank gasket.
6. Use a soft-bristled brush (not wire brush) or plastic (not metal) scraper to remove scale build-up from the
inside surfaces of the tank, outside of the primary heat-exchanger coils, the inside of the drain fitting, and
carefully from the surface of the temperature sensor. Vacuum out the tank.
7. Rinse the drain fitting and the inside of the tank thoroughly with clean tap water.
WARNING!
Risk of fire!
DO NOT clean the sacrificial anode with any chemicals. The anode can react with acids to
create flammable hydrogen gas.
8. Inspect the sacrificial anode on the inside of the tank cover for excessive corrosion or scale build-up.
Use a soft-bristled brush (not wire brush) to remove scale build-up. Replace the anode, if necessary.
9. Install a new tank gasket (Condair does not recommend reusing the tank gasket), and secure the
tank cover to the tank as follows:
Note: The order of installation/torquing of the bolts for the tank cover are shown in the hexagonal symbols in
Figure 12 on page 57. Tighten bolts with your fingers and torque at the end of assembly.
CAUTION!
Risk of damage to the humidifier components or injury!
DO NOT over-torque the bolts. Ensure the proper order of torquing is followed. Failure to do so may
cause damage to the humidifer components or injury. Re-torque values are located Table A1 on page 89.
a. Loosen jam nuts and M8x25 screws on all clamps. Remove top clamps by removing the M6x40
screw securing them in place.
b. Remove the door locks then side clamps, then remove the door and bottom clamp.Put bottom
clamp in place with tabs at ends of the bracket resting on the supports that extend from the tank.
c. Place the gasket into the groove of the door (tank cover) and set door with gasket on the bottom
clamp. Take care that gasket remains in position.
56
Maintenance
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Nortec GS
d. Install the top clamp(s) using the M6x40 screws (with anti-seize). Hand tighten to hold door in place.
e. Install the left and right clamps. Hand tighten M8x25 screws to hold brackets in place.
f.
Use tightening sequence shown below and
Torque top M6x40 screw(s) securing the clamp to 35 in-lb (3.9 Nm)
Torque top clamp, M8x25 screw(s) securing the door to 10 in-lb (1.2 Nm).
Torque side and bottom clamp, M8x25 screws to 20 in-lb (2.3 Nm).
g. Place the door locks on the door, over the left and right clamps, and secure them in place with
the jam nuts.
h. Secure all remaining jam nuts against brackets to hold remaining M8x25 screws in place.
10. Connect the fill hose to the drain fitting and secure it with a clamp.
11. Re-start the humidifier – refer to "Restarting After Shutdown" on page 48. The humidifier then goes through
the start-up sequence. Check for any leaks in the tank cover.
5
6
4
1
3
10
2
7
8
9
Figure 11: Cleaning the Tank
1
2
3
4
Coils, primary heat-exchanger
Tank
Anode, sacrificial
Gasket, tank
5
6
7
8
Clamp, top
Cover, tank
Clamp, right side
Clamp, bottom
9 Clamp, left side
10 Lock, door
Bolt Torquing Sequence for Tank Doors
M6x40
1
9
2
3
M8x25
M8x25
M8x25
M8x25
6
4
M8x25
13
M8x25
5
M8x25
5
1
3
11
M8x25
M6x40
M6x40
M6x40
M8x25
15
M8x25
7
6
2
4
M8x25
M8x25
M8x25
9
M8x25
M8x25
10
8
M8x25
12
10
M8x25
M8x25
M8x25
7
8
M8x25
16
14
M8x25
M8x25
M8x25
18
11
12
M8x25
M8x25
17
M8x25
Figure 12: Torquing the Tank Doors. Small and Large Doors Shown.
Nortec GS
2583701_C_EN_1812_Nortec-GS_OM
Maintenance
57
6.5.3
Cleaning the Secondary Heat-exchanger
Clean the secondary heat-exchanger and the condensate trap (CS/NX model only) as follows. Refer
to Figure 13.
WARNING!
Risk of severe burns from contact with hot surfaces!
Components of the unit can be hot to the touch. Contact with the hot surfaces can result in
severe burns.
Prevention: Allow the unit to cool down to a safe temperature before cleaning the components.
CAUTION!
Risk of damage to the humidifier components!
Do not use solvents, aromatized or halogenized hydrocarbons, or other harsh chemicals for cleaning. Disinfectants may only be used if they do not leave behind toxic residue. Rinse all parts thoroughly with clean tap water after cleaning.
3
1
1
2
5
4
Figure 13: Cleaning Secondary Heat-exchanger - CS/NX Model Only (Nortec GS 100 Shown)
1
2
3
4
5
58
Maintenance
Hose, dual fill valve to secondary heat-exchanger
Hose, secondary heat-exchanger to fill box via dual fill valve
Heat-exchanger, secondary
Dual fill valve
Trap, condensate
2583701_C_EN_1812_Nortec-GS_OM
Nortec GS
1. Drain the tank, and shut down the humidifier as described in "Shutting Down" on page 48.
2. Remove the side panel – refer to "Removal and Installation of Access Panels" on page 54.
3. Disconnect the two water hoses from the secondary heat-exchanger.
4. Flush the inside of the secondary heat-exchanger with clean tap water.
5. Reconnect the water hoses.
6. Disconnect the condensate trap from the secondary heat-exchanger and flush out any scale build-up.
7. Reconnect the condensate trap, and prime the trap with water.
8. Re-start the humidifier – refer to "Restarting After Shutdown" on page 48.
9. Check for leaks.
6.5.4
Cleaning the Float Chamber
Clean the float chamber in the fill box as follows. Refer to Figure 14.
1
2
3
4
6
5
Figure 14: Cleaning Float Chamber
1
2
3
Screw (×3)
Sleeve, float
Float (×2)
4
5
6
Float chamber
Support, float chamber
Fill box weldment
CAUTION!
Risk of damage to the humidifier components!
Nortec GS
2583701_C_EN_1812_Nortec-GS_OM
Maintenance
59
Do not use solvents, aromatized or halogenized hydrocarbons, or other harsh chemicals for cleaning. Disinfectants may only be used if they do not leave behind toxic residue. Rinse all parts thoroughly with clean tap water after cleaning.
1. Shut down the humidifier as described in "Shutting Down" on page 48.
2. Remove the side panel – refer to "Removal and Installation of Access Panels" on page 54.
3. Remove the float chamber from the fill box weldment, the three screws, and the float sleeve.
4. Carefully remove the two floats. Make a note of the orientation of the floats.
5. Use a soft-bristled brush (not wire brush) to remove all scale build-up on the floats, the inside of the
float sleeve and the float chamber. Rinse with clean tap water.
6. Visually check each float for cracks or other damage. Place the two floats in a container filled with
clean water, and check that they both have equal buoyancy. If necessary, replace the floats.
IMPORTANT! When assembling the float sleeve, make sure that the floats are in the same orientation as when they were disassembled – opposing poles of the magnet within the floats must
face up.
7. Assemble the float sleeve making sure that the floats are installed correctly. Install the float sleeve
and secure it to the fill box with the three screws.
8. Re-start the humidifier – refer to "Restarting After Shutdown" on page 48.
9. Ensure that the Float Check is enabled in the features menu – refer to "Features Menu" on page 25.
10. Check for leaks.
6.5.5
Cleaning Hoses, Dual Fill Valves and Drain Pump
Clean the fill and drain hoses, the dual fill valves and the drain pump as follows. Refer to Figure 15 on
page 61.
CAUTION!
Risk of damage to the humidifier components!
Do not use solvents, aromatized or halogenized hydrocarbons, or other harsh chemicals for cleaning. Disinfectants may only be used if they do not leave behind toxic residue.
1. Shut down the humidifier as described in "Restarting After Shutdown" on page 48.
2. Remove the side panel – refer to "Removal and Installation of Access Panels" on page 54.
3. Loosen the hose clamps and remove the fill and drain hoses from the humidifier.
4. Carefully remove the strainer in the dual fill valves. Use a soft-bristled brush (not wire brush) and
carefully remove any scale build-up on the strainer in the dual fill valve. Assemble the dual fill valves
after cleaning, taking care not to damage the strainer.
5. Remove the setscrew, and rotate the drain pump assembly to disengage it from the drain fitting.
Rotate and separate the pump cover from the pump housing. Use a soft-bristled brush (not wire
brush) to remove any scale build-up on the inside of the pump cover, impeller, large O-ring and pump
housing. Assemble all drain pump components in reverse order after cleaning. Install the pump assembly in the drain fitting, making sure that the small O-ring is installed in the drain fitting. Secure
the drain pump in place with the setscrew.
6. Use a rubber mallet to knock out any scale build-up in the fill and drain hoses. Rinse the hoses
thoroughly with hot tap water before installing the hoses. Secure the hoses with clamps.
7. Re-start the humidifier – refer to "Restarting After Shutdown" on page 48.
8. Check for leaks.
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Maintenance
2583701_C_EN_1812_Nortec-GS_OM
Nortec GS
12
23
10
13
22
11
21
14
15
16
20
17
19
3
18
9
7
6
8
4
5
2
1
Figure 15: Cleaning Hoses, Fill Valve and Drain Pump
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Nortec GS
Valves, dual fill
Strainer
Hose, fill box weldment to drain pump
Fitting, drain
O-ring
Setscrew
Cover, pump
Housing, pump
Hose, manual drain
Hose, overflow
Hose, inlet
Hose, tank to fill box weldment drain
Board, float
Hose, dual fill valve to secondary heat-exchanger
15
16
17
18
19
20
21
22
23
2583701_C_EN_1812_Nortec-GS_OM
Hose, secondary heat-exchanger to trap hose
Hose, secondary heat-exchanger to inlet hose
Hose, dual fill valve to inlet hose
Hose, trap
Hose, fill box to tank (main)
Hose, fill box to drain pump
Fill box
Hose, fill chamber to tank
Adaptor, fill
Maintenance
61
6.5.6
Cleaning the Burner Assembly
The burner(s) in the Nortec GS humidifier does not require maintenance. However, if the burner(s) is not
operating properly, clean the burner(s) and spark-igniter as described below. Refer to Figure 16.
WARNING!
Risk of severe injury to personnel, or property damage!
Prevention: Follow proper shutdown procedure before cleaning the burner(s).
1. Shut down the humidifier as described in "Shutting Down" on page 48. Make sure that the tank has
been emptied.
2. Remove the plumbing cabinet door panel.
3. Remove the four M5 nuts that secure the blower tube to the burner assembly.
7
8
9
1
4
6
3
2
5
Figure 16: Cleaning the Burner Assembly
1
2
3
4
5
6
7
8
9
62
Maintenance
Bolt, M6×14, hex-head (qty. 9)
Nut, M5
Tube, blower
Gasket, blower
Spark-igniter
Matting, burner assembly
Gasket, burner – use a new gasket every time the burner assembly is reassembled
Assembly, burner
Lock washer M6
2583701_C_EN_1812_Nortec-GS_OM
Nortec GS
4. Carefully swing the blower assembly and attached blower tube up to disengage it from the burner
assembly.
5. Disconnect the ignition wire from the spark-igniter.
6. Remove the ten M6×12 hex-head bolts (M6x14 for newer units) and the burner assembly. Discard
the burner gasket.
7. Visually inspect the mating on the inside surface of the burner assembly for hot spots, tears, or any
clogging. If the matting has hot spots or tears, replace the burner assembly.
WARNING!
Risk of personal injury!
Prevention: Wear a safety mask and clean the burner assembly in a well ventilated area.
If the matting is clogged, DO NOT use a scraper to remove the blockage. Use low pressure air at
maximum 5 psi (35 Pa) to clear all blockages without damaging the matting. Blow air in the direction
of the arrow.
8. Visually inspect the spark-igniter for any oxidation. Carefully remove any build-up with emery cloth.
Check the electrode gap is 1/8 ± 1/16 in (3 ± 1.5 mm). DO NOT adjust the gap – replace the sparkigniter, if necessary.
9. Assemble the burner assembly in reverse order. Always use a new burner gasket.
10. Apply nickel anti-seize lubricant (Loctite® LB 771™ or equivalent) to the M6×14 hex-head bolts
before assembly. Install with M6 lock washers. Wipe off excess lubricant. Torque the bolts to 4 in·lb
(0.5 N·m). Refer to Figure 17 on page 63 and Figure 18 on page 63.
11. Torque the four M5 nuts to 10 in·lb (1.2 N·m).
12. Restart the unit and check that the burner(s) operates properly.
Bolt Torqueing Sequence for the Burner Assembly
M6x12
5
7
8
M6x12
M6x12
3
4
M6x12
M6x12
2
1
M6x12
M6x12
9
10
6
M6x12
Figure 17: Torque Sequence for the Burner
M6x12
M6x40
M6x10
M6x10
M6x10
M6x10
14
3
5
12
7
10
M6x10
M6x10
1
2
M6x10
M6x10
9
8
M6x10
M6x10
11
6
4
13
M6x10
M6x10
M6x10
M6x10
Figure 18: Torque Sequence onto the Primary Heat-exchanger
Nortec GS
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Maintenance
63
6.5.7
Replacing Backup Battery
DANGER!
Risk of electric shock!
The Nortec GS humidifier is mains powered. Live parts may be exposed when the door panel
on the control cabinet is removed. Touching live parts may cause severe injury or even
death.
Prevention: Shut down the unit as described in "Shutting Down" on page 48 before replacing the
backup battery.
CAUTION!
Electrostatic discharge (ESD)!
The electronic components inside the control cabinet in the humidifier are sensitive to electrostatic discharge (ESD).
Prevention: Take appropriate measures to protect the electronic components inside the unit against
damage caused by electrostatic discharge (ESD). Refer to ANSI/ESD-S20.20.
Only a qualified service technician authorized by the customer should replace the backup battery on
the integrated control board.
Replace the backup battery on the integrated control board as follows. Refer to Figure 19 on page 64.
1. Remove the door panel on the control cabinet. Swing the front panel open.
2. Replace the backup battery on the integrated control board with a new 3V battery (CR 2032).
3. Close the front panel, and install the door panel, making sure that it is fastened securely.
4. Remove the lock and tag from the external disconnect switch, and restore power to the humidifier.
3
2
1
Figure 19: Backup Battery Replacement
1
2
3
64
Maintenance
Panel, front
Battery – 3V (CR 2032)
Board, integrated control
2583701_C_EN_1812_Nortec-GS_OM
Nortec GS
6.5.8
Replacing Internal Fuse
DANGER!
Risk of electric shock!
The Nortec GS humidifier is mains powered. Live parts may be exposed when the door panel
on the control cabinet is removed. Touching live parts may cause severe injury or even
death.
Prevention: Shut down the unit as described in "Shutting Down" on page 48 before replacing the internal fuse.
CAUTION!
Electrostatic discharge (ESD)!
The electronic components inside the control cabinet in the humidifier are sensitive to electrostatic discharge (ESD).
Prevention: Take appropriate measures to protect the electronic components inside the unit against
damage caused by electrostatic discharge (ESD). Refer to ANSI/ESD-S20.20.
Only a qualified service technician authorized by the customer should replace the internal fuse.
Replace the internal fuse in the control cabinet as follows. Refer to Figure 20 on page 65.
1. Remove the door panel on the control cabinet. Swing the front panel open.
2. Replace the fuse with a fast-acting 6 A fuse.
3. Close the front panel, and install the door panel, making sure that it is fastened securely.
4. Remove the lock and tag from the external disconnect switch, and restore power to the humidifier.
1
Figure 20: Internal Fuse Replacement
1
Nortec GS
Fuse, fast-acting, 6 A
2583701_C_EN_1812_Nortec-GS_OM
Maintenance
65
6.5.9
Resetting Service Reminder
CAUTION!
Risk of damage to equipment!
DO NOT reset the service reminder unless the scheduled maintenance has been performed.
Reset the service reminder in the control software as follows after performing the required scheduled
maintenance:
1. Select the <Main Menu> button on the Home screen, then enter the password to login. Refer to
"Main Menu" on page 24.
2. Select Service > General Service tab > Reset Service Reminder. A reset dialog appears and
prompts you to confirm the reset.
3. Select the <Yes> button on the confirmation screen. The maintenance warning and the service
reminder messages are reset.
Select the <No> button at any time to abort the reset.
6.6
Installing Software Updates
All software updates can be downloaded from the Downloads link on www.humidity.com. Download the file
and extract it to a USB memory stick that has been formatted to 32-bit FAT system. The software update
file (ending with .bin) should be located at the root level on the USB stick.
Note: If software updating is accidentally interrupted, the humidifier will not operate. However, updating
can be resumed by leaving the USB key inserted in the board and power cycling the unit. The integrated
control board will detect that the software was not installed properly, and restart the updating.
Install the updates for the control software as follows:
DANGER!
Risk of electric shock!
The Nortec GS is mains powered. Live parts may be exposed when the door panel is removed. Touching live parts may cause severe injury or even death.
Prevention: Shut down the humidifier properly at the external disconnect switch before accessing
the integrated control board in the humidifier.
1. Set the On/Off button to the Off position.
2. Disconnect the power supply to the humidifier at the external disconnect switch. To prevent accidental
power-up, lockout and tag out according to the established safety practices at your facility.
3. Remove the door panel on the control cabinet – refer to "Removal and Installation of Access Panels" on
page 54.
4. Swing the front panel open.
5. Carefully insert the USB memory stick into the USB port. Make sure that the maximum length of the
memory stick does not exceed 3 in (75 mm).
6. Close the front panel, and install the door panel.
7. Remove the lock and tag from the external disconnect switch, and restore power to the humidifier.
8. Set the On/Off button to the On position.
9. When the Home screen appears, select the <MAIN Menu> button, then enter the password to login.
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Maintenance
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Nortec GS
CAUTION!
Risk of file corruption!
DO NOT interrupt software updating once it starts. Wait until updating is completed. Corrupted
control software can render the humidifier unusable.
Note: If software updating is accidentally interrupted, the humidifier will not operate. However,
updating can be resumed by leaving the USB key inserted in the board and power cycling the
unit. The integrated control board will detect that the software was not installed properly, and
restart the updating.
10. Select Administrator > Software Settings tab > Software Update to update the control software.
A progress bar shows the status of the updating process. When updating is completed, the Home
screen is displayed.
11. Repeat Step 1 to Step 4, and carefully remove the USB memory stick.
12. Close the front panel. Install the door panel, making sure that it is fastened securely – refer to "Removal
and Installation of Access Panels" on page 54.
13. Repeat Step 7 and Step 8 to power up the humidifier.
Nortec GS
2583701_C_EN_1812_Nortec-GS_OM
Maintenance
67
7
Fault Isolation
7.1
General
Troubleshooting of the Nortec GS humidifier must only be performed by well qualified and well trained
personnel. Electrical repairs must only be performed by a licensed electrician authorized by the customer
or by Condair service technicians.
Troubleshooting the Nortec GS humidifier may require personnel to access the inside of the control
cabinet in the humidifier which may expose personnel and equipment to the hazards described below.
DANGER!
Risk of electric shock!
The Nortec GS humidifier is mains powered. Live parts may be exposed when the access
panels are removed. Touching live parts may cause severe injury or even death.
CAUTION!
Electrostatic discharge (ESD)!
The electronic components inside the control cabinet in the humidifier are sensitive to electrostatic discharge (ESD).
Prevention: Take appropriate measures to protect the electronic components inside the unit against
damage caused by electrostatic discharge (ESD). Refer to ANSI/ESD-S20.20.
7.2
Fault Indication
When a condition that is not normally expected occurs, it is detected by the control software and a warning or fault message is displayed in the Service/Warning/Fault status area of the Home screen (refer to
Figure 6 on page 18). The warning and fault message types are described in Table 13.
Table 13: Maintenance/Fault Status Descriptions
Message Type
Warning
Descriptions
A condition with a "Warning" status is active. Typically, these conditions are
of a temporary nature, or conditions that cannot cause damage to the system. Depending on the condition, the Nortec GS humidifier may be stopped
or remains operable (unless the warning relates to a control signal). If the
cause of the condition clears on its own accord, the warning message is
automatically reset. If the condition becomes worse, a fault message may
be triggered.
When a warning message is active, the status LED turns yellow in color.
Fault
A condition with a "Fault" status is active. Typically, these are conditions
which prevent further operation of the humidifier, or conditions that can
cause damage to the system. When a fault condition occurs, the Nortec GS
humidifier stops steam production immediately.
When a fault message is active, the status LED turns red in color.
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Fault Isolation
2583701_C_EN_1812_Nortec-GS_OM
Nortec GS
When a warning/fault condition occurs, select the warning or fault message to view the "" on page 38
and additional details. Refer to Figure 21.
Figure 21: Fault History Screens
In addition, the Service relay in the remote fault board can also be set up to indicate that a service warning or a system warning/notification is active.
7.3
General Troubleshooting
Most operational warning/fault conditions are caused by improper installation, or by not adhering to the suggested best practices for installation of the humidifier and system components.
Hence, a full fault diagnosis always requires a thorough examination of the entire system (hose
connections, control systems, etc.).
Table 14 provides general guidelines for troubleshooting the Nortec GS humidifier. For detailed troubleshooting information of the auxiliary system components, refer to their product manuals.
The list of Nortec GS warning and fault messages, and corrective actions are shown in Table 15 on page 71.
Nortec GS
2583701_C_EN_1812_Nortec-GS_OM
Fault Isolation
69
Humidifier
Table 14: General Troubleshooting – Nortec GS Humidifier
Problem
Nothing happens when the
On/Off switch is turned On.
Humidifier will not produce
steam, or does not reach RH
setpoint value.
Probable Cause
Incorrect voltage, or no voltage.
Corrective Action(s)
–– Check the disconnect switch in the supply line.
–– Check the fuse between the transformer and the On/
Off switch.
Step-down transformer not outputting 24 VAC.
–– Check the fuse.
Safety loop is open.
–– Check if the message "Safety Loop" is displayed in
the operating status area of the Home screen.
–– Measure and confirm 24 VAC on the transformer
primary connections. Replace the transformer, if
necessary.
–– Check if there is 24 VAC supply at low voltage terminal strip pin "2".
–– Check that all On/Off devices connected to low voltage terminal strip pins "1" and "2" are wired properly,
and their contacts are closed when they should be.
Humidifier displays warning
or fault message.
70
Fault Isolation
Output is limited by the high limit
humidistat signal.
–– Check if the high limit humidistat is installed too
close to the steam distributor. The recommendation
is five times the absorption distance or minimum
10 ft (3 m). Check the setpoint value for the high
limit – typically set at 80% RH.
No signal on Channel 1.
–– Check voltage between low voltage terminal strip
pins "3" and "4". For a demand signal configuration,
the signal must be 27% of full scale signal for the
humidifier to start. For a transducer signal configuration, the signal must be lower than the setpoint value
for the humidifier to start.
No signal on Channel 2 (on units
with Control Channels set to "Dual").
–– Check voltage between low voltage terminal strip
pins "3" and "5". For a demand signal configuration,
the signal must be 27% of full scale signal for the
humidifier to start. For a transducer signal configuration, the signal must be lower than the setpoint value
for the humidifier to start.
Capacity has been manually
limited.
–– Check/adjust Manual Capacity, if necessary.
The control software has detected an abnormal condition.
–– Refer to "Nortec GS Warning and Fault List" on page 71.
2583701_C_EN_1812_Nortec-GS_OM
Nortec GS
7.4
Nortec GS Warning and Fault List
Table 15 shows the list of warning and fault messages triggered by the control software in the Nortec GS
humidifier, and the corrective actions. The warning code escalates to a fault code if the alarm condition is not resolved within a certain period of time. After fixing a fault condition, reset the fault status as
described in "Resetting Fault Status" on page 80.
The components of the driver board and the integrated control board referenced in this section are shown
in Figure 22 on page 81 and Figure 23 on page 81.
Table 15: Nortec GS Warning and Fault List
Code
Warning
Fault
W01
E01
W06
W07
–
Nortec GS
–
–
E10
Message
Smartcard missing
Main Unit Missing
(or)
Extension Missing
(No Signal Warning)
Ext Fault
CTRLR Fault
(or)
Memory
(or)
CTRLR Reset
Probable Cause
Corrective Action(s)
No communication with the SIM card.
The SIM card may not be seated
properly on the integrated control
board.
Check that the SIM card is seated
properly.
Defective SIM card.
Contact your Condair representative.
No communication between the Extension unit and the Main unit in the
Linkup chain. Operation is interrupted until a signal is received.
The Linkup configuration between
the Main and Extension unit is not set
correctly.
–– Check the Linkup configuration.
The Main unit or Extension unit may
be switched off.
–– Switch on the Main and/or
Extension unit.
Loose connection.
–– Check the connection between
the Main and Extension units.
An Extension unit has a fault condition which was communicated to the
Main unit.
Alarm condition in the Extension
unit(s).
–– Check the Extension unit(s).
Flash memory read/write fault.
–– Contact your Condair
representative.
2583701_C_EN_1812_Nortec-GS_OM
Fault Isolation
71
Code
Warning
Fault
W22
E22
Message
Probable Cause
Fill Warning (W22)
Fill Timeout (E22)
Corrective Action(s)
The fill valve(s) have been active for an extended length of time and the
water level is still zero. The dual fill valves remain activated.
The Fill Warning will eventually become a Fill Timeout if the issue has not
been addressed.
Water supply problems.
–– Make sure that the water supply line is open, and there is
adequate flow and pressure.
Loose wiring, or clogged strainer in
dual fill valves.
–– Check the wiring to the float
board and the dual fill valves.
–– Check the strainer in the dual fill
valves is not clogged – refer to
"Cleaning Hoses, Dual Fill Valves and
Drain Pump" on page 62.
Drain pump running, or manual drain
valve open.
–– Check that the manual drain
valve is closed, and the drain
pump is not running.
Floats may be stuck.
–– Visually check that the different
LEDs on the float board light up
as the water level in the float
chamber changes. If necessary,
clean the float chamber – refer
to "Cleaning the Float Chamber" on
page 61.
Fill valve relay on the driver board
not seated properly, or defective.
CAUTION! Electro-static discharge
damage to board.
–– Check that LED3 (corresponding
to REL4 for the high volume fill
valve) and LED4 (corresponding to REL5 for the low volume
fill valve) on the driver board
light up when the fill valves are
supposed to be energized. If
not, check the relay(s) is seated
properly on the driver board.
–– Swap the relay(s) with another
relay on the board to verify that it
is working. If necessary, replace
the relay.
W28
E28
Maintenance Due
Warning
Maintenance Due
Fault (on fault)
Defective dual fill valves.
–– Check for 24 VAC on the pins
of the dual fill valves. If necessary, replace the dual fill valves.
Reconnect the wires correctly.
Scale build-up in the drain fitting.
–– Clean the drain fitting, as
described in "Cleaning the Tank" on
page 57.
The preset service interval time has elapsed. The unit will continue to run
for 200 hours before a fault message is generated.
The unit will not operate if the warning message escalates to a fault message.
IMPORTANT! Perform the required scheduled maintenance, then reset
the service reminder before restarting the unit.
Unit needs to be serviced.
–– Refer to "Maintenance" on page 51
for maintenance procedures.
–– Reset the service reminder
after performing the required
scheduled maintenance – refer
to "Resetting Service Reminder" on
page 68.
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Fault Isolation
2583701_C_EN_1812_Nortec-GS_OM
Nortec GS
Code
Warning
Fault
W32
–
Message
RH Signal
Probable Cause
Corrective Action(s)
The RH input is less than 3%. Operation is interrupted until an input higher
than 3% is received.
Loose wiring, faulty sensor.
–– Check the connection between
the sensor and the unit.
–– Swap the sensor with another
sensor and verify that it is working. If necessary, replace the
sensor.
Layout of the humidifier control system may be causing signal interference.
W34
–
Remote Disabled
–– Check that the controls layout
permits accurate readings.
The unit has been disabled remotely by the building management system
(BMS) through Modbus communication. Operation is interrupted until the
unit is enabled again through Modbus or the control software.
Unit disabled through the BMS.
–– Enable the unit through the
BMS.
–– If unit cannot be enabled
remotely, try enabling the unit
through the Modbus setting in the
control software.
W35
–
BMS T/O (timeout)
The maximum wait time without any communications from the BMS has
been exceeded. If the signal Source is set to "Analog", the humidifier will
continue operating; otherwise it stops producing steam until communications with the BMS is re-established.
W42
–
RH High Warning
Sensed humidity is above the RH High value configured in the control software. The unit will remain idle until the sensed RH value drops below the
setpoint value.
Incorrect layout of the humidifier
control system (sensor location too
close to steam distributor or other
sources that affect measurement), or
defective components.
–– Check the humidifier control
system.
Humidifier capacity too large for the
space being humidified.
–– Limit the output capacity of
the humidifier – refer to Manual
Capacity.
–– Adjust the proportional and/or integral
value of the controller.
The RH High value for the sensor
signal may be set too low.
W43
Nortec GS
–
RH Low Warning
–– Adjust the RH High value for the
sensor signal.
Sensed humidity is below the minimum value configured in the control software. The unit should continue operating unless it is in standby mode.
Incorrect layout of the humidifier
control system (sensor location too
close to steam distributor or other
sources that affect measurement), or
defective components.
–– Check the humidifier control
system.
The RH Low value for the sensor
signal may be set too high.
–– Adjust the RH Low value for the
sensor signal.
Unit may be in standby mode.
–– Check the safety loop is
closed, and that all burners are
operational.
2583701_C_EN_1812_Nortec-GS_OM
Fault Isolation
73
Code
Warning
Fault
–
E46
W52
–
Message
Probable Cause
Drain Check
Corrective Action(s)
The drain pump has been active for an extended period of time without
the water level changing in the float chamber. The unit needs to drain for
optimal performance. Fix the problem before restarting the unit.
Float Inconsistent
Backpressure in the drain line may
be causing slow drain.
–– Remove any blockages in the
drainage system.
Loose connection.
–– Check the connections between the float board and the
driver board, as well as the drain
pump.
Floats may be stuck.
–– Visually check that the different
LEDs on the float board light up
as the water level in the float
chamber changes. If necessary,
clean the float chamber – refer
to "Cleaning the Float Chamber" on
page 61.
Drain pump may be clogged.
–– Clean the drain pump – refer to
"Cleaning Hoses, Dual Fill Valves and
Drain Pump" on page 62.
On unit startup the float levels do not rise logically from low water level L1
(red LED) to high water level L5 (yellow LED).
Excess backpressure in the steam
line.
–– Check the steam line.
Float level sensor may be malfunctioning.
–– Inspect all hoses and
connections.
–– Clean the float chamber – refer
to "Cleaning the Float Chamber" on
page 61.
W57
–
Startup Code
Activation code required to use the humidifier.
Activation code missing.
–
E84
Driver Board Fault
–– Contact your Condair
representative.
No communication between the integrated control board and the driver
board.
Dip switch settings are not correct.
–– Verify dip switch settings.
Communication cable between the
driver board and the integrated control board not connected properly.
–– Make sure the RS485 cable is
connected to J15 (RS4851) on
the driver board, and J12 on the
integrated control board.
–– With the unit powered up,
check that LED1 and LED10 on
the driver board are flashing.
Otherwise, contact your Condair
representative.
Unspecified driver board fault.
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Fault Isolation
2583701_C_EN_1812_Nortec-GS_OM
–– Check that the heartbeat LED10
on the driver board is blinking.
Otherwise, contact your Condair
representative.
Nortec GS
Code
Warning
Fault
–
E138
W139
–
Message
Over-Temperature
Fault
No Burners Available
Probable Cause
The exhaust or tank safety sensor has exceeded the safety limit. The unit
will not operate when this fault condition is active. Fix the problem first,
then reset the over-temperature switch as described in "Resetting Fault Status"
on page 80.
Unit may be operating with incorrect
water level.
–– Check that the float chamber is
operating properly.
Exhaust vent may be blocked.
–– Make sure that the exhaust vent
is free of obstructions.
Dual fill valves may not be working
properly.
–– Refer to the troubleshooting
procedure for fault code E145.
Thermocouple wire may be damaged.
–– Visualy inspect the thermocouple wire for kinks or other
damage.
Excess scale build-up on the coils of
the primary heat-exchanger.
–– Remove scale build-up – refer to
"Cleaning the Tank" on page 57.
Temperature of the water supply may
be too high.
–– Check that the temperature of
the water supply. For optimal
performance, temperature must
not exceed 70 °F (21 °C).
Exhaust condensate removal (on CS/
NX model) may be blocked.
–– Check for blockages in the exhaust drain line in the unit.
All burners have been disabled through the control software. No burners are available for operation of the unit. The unit will not respond to a
demand until one or more burners is enabled.
Burners disabled.
–
Nortec GS
E140
Keep Warm Fault
Corrective Action(s)
–– Enable the burners in the control
software.
The Keep Warm function is activated, but the tank temperature has not
increased in the allotted time.
Loose connection.
–– Check the tank temperature sensor connection.
Burners may be disabled.
–– Check that no more than one
burner is disabled in the control
software.
Scale build-up on the temperature
sensor.
CAUTION! The tank may be hot to
the touch.
–– Carefully remove scale build-up
on the sensor as described in
"Cleaning the Tank" on page 57.
Defective temperature sensor.
CAUTION! The tank may be hot to
the touch.
–– Check the tank to see if it is hot.
Then check the electrical signal
to the sensor. Replace the sensor, if defective.
2583701_C_EN_1812_Nortec-GS_OM
Fault Isolation
75
Code
Warning
Fault
W141
Message
Probable Cause
Ignition Fail
Corrective Action(s)
The ignition module identified has failed to ignite within the allotted time
(4 minutes). The unit will index to next available burner in the sequence.
Loose wiring, or defective sparkigniter.
–– Visually check the sight port of
problematic burner.
–– Check if sparking can be seen
or heard during the ignition
sequence.
–– Check if the burner ignites, but
stops after 3 seconds.
–– Remove and clean oxidation on
the igniter.
–– Check the distance between the
'spark gap'.
–– Check the spark-igniter connection. If necessary, replace the
spark-igniter.
Gas supply problem.
–– Check the gas supply is open.
–– Check for 24 VAC at the gas
valve.
–– Check the status LED on the
ignition control module – three
flashes of the red LED indicate
problem with the supply, or gas
valve, or a loose connection.
Contact your Condair representative if further assistance is
required.
–
E142
No Burners Available
Faulty ignition control module.
–– Check the status LED on the
ignition control module – a solid
red LED indicates an ignition
control module failure. Replace
the ignition control module, if
necessary.
Incorrect gas valve adjustments.
–– Check if the throttle adjustment
on the gas valve has been
tampered.
All burners have experienced an ignition control module failure, and no
burners are available to produce steam. The unit is unsafe to operate with
this fault condition. Fix the problem before restarting the unit.
Gas supply problem.
–– Check the gas supply is open.
–– Check for 24 VAC at the gas
valve.
–– Check the status LED on the
ignition control module – three
flashes of the red LED indicate
problem with the supply, or gas
valve, or a loose connection.
Contact your Condair representative if further assistance is
required.
Loose wiring, or defective sparkigniter.
–– Visually check the sight port of
problematic burner – check for
a glowing red spark-igniter followed by a flame.
–– Check the spark-igniter connection. If necessary, replace the
spark-igniter.
Faulty ignition control module.
76
Fault Isolation
2583701_C_EN_1812_Nortec-GS_OM
–– Check the status LED on the
ignition control module – a solid
red LED indicates an ignition
control module failure. Replace
the ignition control module, if
necessary.
Nortec GS
Code
Warning
Fault
–
E143
Message
Gas Valve Fail
Probable Cause
Corrective Action(s)
The identified gas valve was energized out of sequence, or when it was
not expected to be energized. The unit is unsafe to operate with this fault
condition. Fix the problem before restarting the unit.
Loose connections.
–– Make sure that all onboard electronics are connected according
to the wiring diagram.
–– Check the status LED on the
ignition control module – three
flashes of the red LED indicate
problem with the supply, or gas
valve, or a loose connection.
–– Check connections to all ignition
control modules and gas valves.
Check for 24 VAC at location
labelled "TH" on the ignition
control module.
Faulty gas valve.
–
E144
Float Level
–– Check for voltage at locations
labelled "TH" and "V2" on the
ignition control module after the
blower has completed prepurging the system. If 24 VAC
voltage is detected at "V2" but
not at "TH", replace the gas
valve. Contact Condair to order
a replacement gas valve.
On three consecutive occasions, more than one float level was registering
at the same time. The unit cannot operate without accurate float level reading. Fix the problem before restarting the unit.
Floats may not be working properly.
–– Check the float chamber for
scale build-up, and clean if necessary – refer to "Cleaning the Float
Chamber" on page 61.
–– Check that both floats have
equal bouyancy, as described
in "Cleaning the Float Chamber" on
page 61. Replace the floats, if
necessary.
Faulty float board
–– Examine the float board for
signs of corrosion, splashed
water on it, or other damage.
Replace the float board, if
necessary.
Obstructions in hoses, or hoses
plumbed incorrectly.
–– Check for obstructions in the
hoses.
–– Check that all hoses are
plumbed correctly.
Nortec GS
2583701_C_EN_1812_Nortec-GS_OM
Fault Isolation
77
Code
Warning
Fault
–
E145
Message
Fill Check Fault
Probable Cause
Corrective Action(s)
The dual fill valves have been active for an extended period of time without
the water level rising in the float chamber. The unit will not operate without
an accurate water level reading. Fix the problem before restarting the unit.
Water supply problems.
–– Make sure that the water supply line is open, and there is
adequate flow and pressure.
Loose wiring, or clogged strainer in
dual fill valves.
–– Check the wiring to the float
board and the dual fill valves.
–– Check the strainer in the dual fill
valves is not clogged – refer to
"Cleaning Hoses, Dual Fill Valves and
Drain Pump" on page 62.
Drain pump running, or manual drain
valve open.
–– Visually check that the manual
drain valve is closed, and the
drain pump is not running.
Floats may be stuck.
–– Visually check that the different
LEDs on the float board light up
as the water level in the float
chamber changes. If necessary,
clean the float chamber – refer
to "Cleaning the Float Chamber" on
page 61.
Fill valve relay on the driver board
not seated properly, or defective.
CAUTION! Electro-static discharge
damage to board.
–– Check that LED3 (corresponding
to REL4 for the high volume fill
valve) and LED4 (corresponding to REL5 for the low volume
fill valve) on the driver board
light up when the fill valves are
supposed to be energized. If
not, check the relay(s) is seated
properly on the driver board.
–– Swap the relay(s) with another
relay on the board to verify that it
is working. If necessary, replace
the relay.
78
Fault Isolation
Defective dual fill valves.
–– Check for 24 VAC on the pins
of the dual fill valves. If necessary, replace the dual fill valves.
Reconnect the wires correctly.
Scale build-up in the drain fitting.
–– Clean the drain fitting, as
described in "Cleaning the Tank" on
page 57.
2583701_C_EN_1812_Nortec-GS_OM
Nortec GS
Code
Warning
Fault
–
E146
Message
Blower Not Operating
Probable Cause
Corrective Action(s)
The identified blower is not operating, or registered a value below 500 rpm
while being energized. The unit is unsafe to operate with this fault condition. Fix the problem before restarting the unit.
Loose connections.
–– Check the PWM (pulse width
modulation) and power connection to the blower.
Blower relay on driver board may be
defective.
CAUTION! Electro-static discharge
damage to board.
–– Visually check that LED7 (corresponding to relay REL8 for the
blower) on the driver board lights
up when the blower is supposed
to be energized. If LED7 does
not light up, the relay is faulty.
–– Replace the driver board. Refer
to the GS Spare Parts List.
Blower feedback signal may be
missing.
–– Restart the unit, and check the
blower rpm in Input Diagnostics in
the control software. If the rpm
is low, contact your Condair
representative.
Restrictions at blower, or damaged
blower.
–– Visually inspect the blower and
blower inlet for restrictions.
–– Visually inspect the blower
impeller for damage. Order a replacement blower, if necessary.
Main power to blower relay damaged.
–– Visually inspect the connections
between the main power.
–– Visually inspect the blower
relay for damage and replace if
necessary.
Worn out blower.
W147
–
Blower rpm Low
–– The blower speed may decrease
due to wear. The blower is safe
to operate, but the output may
be reduced. Order a replacement blower.
The blower identified is running at a lower rpm than expected by more than
the allowable tolerance. The unit will continue monitoring the blower rpm
and display this warning if the rpm remains low.
Loose connections.
–– Check the PWM and power connection to the blower.
Low voltage.
–– Visually check that LED7 (corresponding to relay REL8 for the
blower) on the driver board lights
up when the blower is supposed
to be energized.
–– Check for 120 VAC on the output side of the blower relay.
W148
–
Blower rpm High
Restrictions at blower, or damaged
blower.
–– Visually inspect the blower and
blower inlet for restrictions.
Worn out blower.
–– The blower speed may decrease
due to wear. The blower is safe
to operate, but the output may
be reduced. Order a replacement blower.
The blower identified is running at a higher rpm than expected by more
than the allowable tolerance. The unit will continue monitoring the blower
rpm and display this warning if the rpm remains high.
Loose connection.
Nortec GS
2583701_C_EN_1812_Nortec-GS_OM
–– Check the PWM connection to
the blower.
Fault Isolation
79
Code
Warning
Fault
W149
E149
Message
Probable Cause
AP Open Warn
Corrective Action(s)
The air proving switch identified has opened while the unit was operating
or during blower start-up. The unit will interrupt operation and retry three
times. After a third attempt a fault message is generated. The unit is unsafe
to operate with this fault condition. Fix the problem before restarting the
unit.
Blockage in the air intake vent or air
intake terminal.
–– Visually inspect the air intake
vent and air intake terminal for
blockages.
Pressure tubes not connected, or
loose wiring.
–– Check the pressure tube connections are attached securely.
–– Check the wiring between the air
proving switch(es) and connecctor J2 on the driver board. With
demand off and the blower not
operating, check for 24 VAC at
pins 1 and 2 on connector J2.
7.5
Defective air proving switch.
–– Check that the air proving switch
remains closed during operation
of the blower. Check for suction
in the pressure tubes. If the air
proving switch does not close, it
may be defective and must be
replaced.
Exhaust condensate removal (on CS/
NX model) may be blocked.
–– Check for blockages in the exhaust drain line in the unit.
Resetting Fault Status
With the exception of the over-temperature fault (see below), the following procedure should be used to
reset all other fault conditions including the ignition control module safety lockout.
Reset the "Fault" status as follows:
1. Correct the cause of the problem.
2. Set the On/Off button to the Off position.
3. Wait approximately for 5 seconds, then set the On/Off button to the On position.
If the alarm condition has been eliminated, the fault message is automatically reset; otherwise the
fault message reappears after a short while.
Resetting Over-Temperature Fault
Reset the over-temperature "Fault" status as follows:
1. Correct the cause of the problem.
2. Wait for the unit to cool down.
3. Press the reset button on the over-temperture switch.
4. Set the on/off button to the Off position. Wait for approximately 5 seconds.
5. Set the on/off button to the On position. If the alarm condition has been eliminated, the fault message
is automatically reset. Otherwise, the fault message reappears after a short while.
80
Fault Isolation
2583701_C_EN_1812_Nortec-GS_OM
Nortec GS
7.6
Driver Board Layout
Figure 22 shows the components of the driver board that are referenced in Section 7.4, "Nortec GS Warning
and Fault List" of this manual.
4
U7
C67
D3
C2
C61
C74
R2
R1
R62
R56
TP32
C71
D18
U8
U11
R96
C58
C72
R85
D11
D32
D53
C83
TP25
L3
R71
TP4
C80
REL1
D7
D4
C73
R65
R69
TP3
D8
6
R93
R64
TP7
R97
C9
2
C82
C81
C79
R3
R13 R53
R9 R16
C5
JP1
C57
C3
ZD4
3
1
C16
D49
R20 R54
ZD3
ZD2
D5
U4
2
D2
TP1 R5
R7
L1
R75
LED3
S1
C4
IGNITION2
TP2
R72
Fa
D6
C7
LED6
REL4
D46
D9
R6
R8
R34
D1
C6
TP29
REL7
D24
R29
J6
1
R76
U9
R35
R30
LED12
D38
R73
C64
3
LED4
TP10
R98
C59
1
D47
REL2
C68
REL8
LED7 D50
REL5
EXT1
R95
R24
TP13
C25
IGNITION1
REL6
C65
R94
C78
D36
C46
R68
J5
TP14
R77
R74
D40
A/P SWITCH
C23
C24
D25
R60
C36
J2
TP15
C62 TP28
TP27
C55
R23
R66
TP23
REL9
LED8 D51
LED5
J18
J4
C49
C69
3
C66
3
1
D48
TP16
L2
D39
U12
C12
R25
D52
R78
D22
R32
C30
U5
LED9
D15
C26
U10
C47
C10
U1
C27
R86
REL3
R21
TP8
D19
LED10
XT1
C70
REL10
C21
C18
R18
JP2
D41
R88
R14
R11
D37
C48
1
TP12
R26
R87
TP5
C75
D12
LED1
U3
LED11
TP17
C29
C20
24V
TP24
DIGI_INPUTS
R45
R46
TP11 C28
PMP_FRE_DRN_BLOWER
R41
6
R42
2
10V
8
R51
R33
C32 R27
R61
C50
C45
2
J10
U2
J14
C35
R67
R59
D44
D42
D20
C76
TP21
TP18
TP22
C33 C31
C13
C34
24Vout
6
C43
R47
U6
RS485-1 J13
R89
R91
J15
1
R19
R49
T1
TP19
C19
C11
RS485-2
5
R50 R52
R12
TP6
D13
U13
C52
J16
1
J3
T2
TP20
R90
7
TP33
U14
R92
1
D28
R39
C41
2
R37
C37
R43
1
D30
D23
3
D29
R40
C42
R55
1
C38 R38
C44
R48
C39
C15
R63
C77
TP9
R22
3
R44
Fb
R15
C22
C14
1
D31
C40
D16
D10
C8
D17
C51
R17 C17 R10
R31
Fc
LED2
R82
TP30
D43
C53
C54
J1
1
FLOAT
5
1
J7
PWM1
4
1
J8
PWM2
4
1
J17
FILL_1_2_3
5
1
J11
EXT1
4
1
J9
NTC
2
1
J12
POWER SUPPLY
GS Driver 2580143
4
Figure 22: Nortec GS Driver Board Layout
7.7
Integrated Control Board Layout
J15
J2
RFB
Figure 23 shows the components of the integrated control board that are referenced in Section 7.4, "Nortec
GS Warning and Fault List" of this manual.
–
+
GND
–
+
GND
–
+
GND
GND
TD
RD
GND
5V
3.3 V
24 V
JP4
JP8
J12
J14
J19
JP11
JP7
CR2032
Battery
J23
SIM Card
J21
J16
J10
USB
Linkup
J6
ETHERNET
Modbus/ BACnet MSTP
ACC.
J3
Comm. Port
J22
LED
J18
J17
Display
Display
Figure 23: Integrated Control Board Layout
Nortec GS
2583701_C_EN_1812_Nortec-GS_OM
Fault Isolation
81
Wiring Diagrams
R
R
Y
FTBD
6
7
8
R
R
9
EXTERNAL
Unit ON Steam Service
INTERNAL
Bk
L
NO
COM
NO
COM
NC
NO
COM
NC
NO
COM
+10 VDC
GND
5
PRIMARY VOLTAGE
CONNECTION
Error
Remote Fault PCB
On/Off
Switch
Transformer
6A
1
3
R 24V
Gr/Y
1 2
Tank
Temp
ON CTS
Stack
Hi-Limit
Tank
Hi-Limit
J1
Fill 2
S
Bk
R
Bk
J10
J1
float
J7
pwm1
Y
R
Gr
R
SIM
card
DRIVER
BOARD #1
pwm2
Bl
R
J3
JP4
R
O
JP8
pmp_fre
drn_blower
Bk
Bk
Bk
J13
J9
24Vout
ntc
J15
JP1
J12
Y
M
R
power
R
a/p
J2
R
RS485-1
ignition2
ignition1
J6
J5
R
W
R
J16
RS485-2
3
4
Br
Modbus
Linkup
J10
JP11
ext
Gr/Y
7
J3 J2
battery
fill 1,2,3
R
R
Bk
5 1 6 2
J6
JP7
digi inputs
J14
8
M
Gr
Drain Valve
(optional)
RFB
ACC
J1
J17
J11
R
Bl
Bk
J8
W
3 or 4-Burner
Units Only
Blower
Relay
INTEGRATED
CONTROL
BOARD
J12
R
Bk
Gr
J14
Gr
Bk
J16 J15
display
Drain
Pump
J17
comm port
J19
display
Bk
R
Bk
Gr
J18
LED
J22
R
Bk
Gr
USB
J23
U U
ethernet
J21
U U
W
Bk
Air Pressure
Switches
Note 1
Br
Gr/Y
R W Bl
Ignition
Module 1
_
Spark
Igniter
For GS 23, 45, 90 models
see Note 1
L1
Gr PS Bk PWM
GND
W
HS out
R
PS +
1
R
Br
R W Bl
Ignition
Module 2
Spark
Igniter
Blower 1
For GS 23, 45, 90 models
rectifier is required for
each gas valve.
Gas Valve2
GND
TH
V1
V2
GND
TH
V1
V2
Gr/Y
Br
Gas Valve1
2-Burner
Units Only
+
Rectifier
Bk
Gr/Y
R W Bl
M
Gr/Y
L2
GND
TH
V1
V2
Fill 1
S
Gr
W
Br
R
Bk
R
W
Bk
Gr
R
W
Bk
Gr
JP2
Bk R Br W Gr
Bl
Br
4
Float Board
Gr/Y
INTERNAL
2
S1
N
EXTERNAL
S
Y
4
Gr/Y
3
CH 1
2
CH 2
GND
1
Gr/Y
Low voltage
terminal strip
CONTROL SIGNAL
CONNECTIONS
24 VAC
Legend:
Wire Colors
R - Red
W - White
Bk - Black
Bl - Blue
Br - Brown
O - Orange
Y - Yellow
Gr - Green
Gr/Y - Green & Yellow
Security Loop
8
Ignition
Module
Blower 2
L1
Gr PS Bk PWM
GND
W
HS out
R
PS +
1
2-Burner
Units Only
3 or 4-Burner
Units Only
Continued on
next wiring diagram
A
3 or 4-Burner
Units Only
Continued on
next wiring diagram
B
3 or 4-Burner
Units Only
Continued on
next wiring diagram
C
M
Gr/Y
L2
3 or 4-Burner
Units Only
Continued on
next wiring diagram
D
Figure 24: Wiring Diagram - Nortec GS 50/100/150/200/300/450/600
JP4
J6
JP7
JP8
J10
82
Wiring Diagrams
Jumper, for activating the termination resistor for Modbus or BACnet MSTP network.
Connector, Modbus (RS485 interface)
Jumper, for activating Modbus or BACnet MSTP communication via connector J6.
Termination, Linkup system
Connector, Linkup
2583701_C_EN_1812_Nortec-GS_OM
Nortec GS
Figure 25 shows the supplementary wiring diagram for the Nortec GS 450/600. Connections are carried
over from Figure 24 on page 82.
Legend:
Wire Colors
R - Red
W - White
Bk - Black
Bl - Blue
Br - Brown
O - Orange
Y - Yellow
Gr - Green
Gr/Y - Green & Yellow
Continued from
previous wiring diagram
C
Continued from
previous wiring diagram
B
Continued from
previous wiring diagram
A
D
1 2
S1
ON CTS
J10
J1
Fill 3
S
Fill 4
S
R
W
Bk
Gr
R
W
Bk
Gr
Bk
R
Bk
JP2
float
J7
pwm1
Blower 3
J8
DRIVER
BOARD #2
pwm2
Bl
L1
J3
digi inputs
Gr PS Bk PWM
GND
W
HS out
R
PS +
1
J17
W
fill 1,2,3
R
J14
J11
pmp_fre
drn_blower
ext
Gr/Y
J15
JP1
J12
power
a/p
J2
RS485-1
ignition1
J5
R
W
ignition2
J6
R
J16
Gr PS Bk PWM
GND
W
HS out
R
PS +
1
R
Bk
Gr
RS485-2
Br
Br
Gr/Y
L2
Gas Valve4
R W Bl
GND
TH
V1
V2
GND
TH
V1
V2
Ignition
Module 3
Gr/Y
4-Burner
Units Only
Gas Valve3
R W Bl
M
W
Bk
Gr/Y
L2
L1
24Vout
ntc
Gr/Y
Blower 4
J13
J9
Y
R
M
Spark
Igniter
Ignition
Module 4
Spark
Igniter
4-Burner
Units Only
Figure 25: Wiring Diagram - Nortec GS 450/600
Nortec GS
2583701_C_EN_1812_Nortec-GS_OM
Wiring Diagrams
83
9
Decommissioning
9.1
General
If the Nortec GS humidifier needs to be removed from service (for disposal or long-term storage), strictly
follow all instructions in this chapter.
Personnel Qualifications
Decommissioning of the Nortec GS humidifier must only be performed by a qualified service technician
authorized by the customer. It is the customer's responsibility to verify qualifications of the personnel.
Safety
Decommissioning of the Nortec GS humidifier will require personnel to access the inside of the control
and plumbing cabinets in the humidifier, which may expose personnel and equipment to the hazards
described below.
DANGER!
Risk of fire or explosion!
The Nortec GS is a gas-fired humidifier. Improper decommissioning can cause an explosion,
fire or other hazards that can cause serious injury, death or property damage.
Any work on the gas system must only be performed by a qualified installer, service agency or your
local gas supplier.
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 fire department.
DANGER!
Risk of electric shock!
The Nortec GS humidifier 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: Shut down the unit as described in "Shutting Down" on page 48 before proceeding.
WARNING!
Risk of severe burns from contact with hot water or hot steam vapors!
The water in the tank in the humidifier can be up to 212 °F (100 °C). Contact with the hot water or hot steam vapors can result in severe burns.
Prevention: Shut down the unit as described in "Shutting Down" on page 48 and wait for the unit to
cool down before proceeding.
84
Decommissioning
2583701_C_EN_1812_Nortec-GS_OM
Nortec GS
WARNING!
Risk of severe burns from contact with hot surfaces!
Components of the stream system may reach 212 °F (100 °C) during operation. Contact with
the hot surfaces can result in severe burns.
Prevention: Avoid touching any components in the plumbing cabinet until the unit has cooled down
to room temperature.
CAUTION!
Electrostatic discharge (ESD)!
The electronic components inside the control cabinet in the humidifier are sensitive to electrostatic discharge (ESD).
Prevention: Take appropriate measures to protect the electronic components inside the unit against
damage caused by electrostatic discharge (ESD). Refer to ANSI/ESD-S20.20.
9.2
Removal from Service for Disposal or Long-term Storage
Remove the Nortec GS humidifier from service (for disposal or long-term storage) as follows:
1. Drain the tank, and shut down the humidifier as described in "Shutting Down" on page 48. Follow all
safety precautions.
2. Disconnect the gas connection to the humidifier.
3. Disconnect and remove the power supply to the Nortec GS humidifier. Refer to "Wiring Diagrams" on
page 82.
4. Disconnect and remove the control signal inputs to the humidifier.
5. Disconnect the steam and condensate lines, and empty out all fluids.
6. Disconnect the water and drain connections to the humidifier.
7. Disconnect and remove the intake and exhaust vents.
8. Remove the humidifier from its mounting surface.
9. If the Nortec GS humidifier is to be put into long-term storage, store the humidifier in its original
packaging inside a protected area that meets the following requirements:
•
Room temperature: 41 to 104 °F (5 to 40 °C)
•
Room humidity: 10 to 75% RH
10. If the Nortec GS humidifier is to be disposed off, refer to "Disposal/Recycling".
9.3
Disposal/Recycling
The Nortec GS humidifier should not be disposed off in domestic waste, and should only be disposed
off in accordance with local regulations at authorized collection facilities.
If you have any questions, contact the appropriate local authorities or your local Condair representative.
Nortec GS
2583701_C_EN_1812_Nortec-GS_OM
Decommissioning
85
10
Product Specifications
10.1
Performance Data
10.2
Minimum Input
Maximum Input
Natural Gas
BTUh (kW)
Propane
BTUh (kW)
Natural Gas
BTUh (kW)
Propane
BTUh (kW)
Min./Max. Steam
Capacity
lb/h (kg/h)
GS 50-CS
GS 50-NX
12,400 (3.6)
13,000 (3.8)
13,000 (3.8)
–
62,000 (18.2)
65,000 (19.0)
62,000 (18.2)
–
10-50 (4.5-23)
10-50 (4.6-23)
GS 100-CS
GS 100-NX
24,800 (7.3)
26,000 (7.6)
24,800 (7.3)
–
124,000 (36.3)
120,000 (35.2)
124,000 (36.3)
–
20-100 (9-45)
20-100 (9-45)
GS 150-CS
GS 150-NX
37,200 (10.9)
39,000 (11.4)
37,200 (10.9)
–
186,000 (54.5)
187,500 (55.0)
186,000 (54.5)
–
30-150 (13.6-68)
30-150 (13.6-68)
GS 200-CS
GS 200-NX
24,800 (7.3)
26,000 (7.6)
24,800 (7.3)
–
248,000 (72.7)
240,000 (70.3)
248,000 (72.7)
–
20-200 (9-91)
20-200 (9-91)
GS 300-CS
GS 300-NX
37,200 (10.9)
39,000 (11.4)
37,200 (10.9)
–
372,000 (109.0)
375,000 (109.9)
372,000 (109.0)
–
30-300 (13.6-136)
30-300 (13.6-136)
GS 450-CS
GS 450-NX
37,200 (10.9)
39,000 (11.4)
37,200 (10.9)
–
558,000 (163.5)
562,500 (164.9)
558,000 (163.5)
–
30-450 (13.6-204)
30-450 (13.6-204)
GS 600-CS
GS 600-NX
37,200 (10.9)
39,000 (11.4)
37,200 (10.9)
–
744,000 (218.0)
750,000 (219.8)
744,000 (218.0)
–
30-600 (13.6-272)
30-600 (13.6-272)
Nortec GS
Model
Operating Data
Control Signal Input Type:
Active
0-5 VDC, 1-5 VDC, 0-10 VDC, 2-10 VDC, 0-20 VDC, 0-16 VDC, 3.2-16 VDC,
0-20 mADC, 4-20 mADC
Passive
135-10 kΩ ohmic humidity sensor
On/Off control
<2.5 VDC
2.5-20 VDC
Digital inputs (via Modbus, BACnet IP/
MSTP slave)
BACnet IP, BACnet MSTP Slave, Modbus, LonWorks (Option), BACnet MSTP
BTL-Certified (Option), BACnet IP BTL-Certified (Option)
Off
On
Ambient Conditions:
Ambient temperature
41-104 °F (5-40 °C)
Relative humidity
5-80% (non-condensing)
Combustion Air:
Combustion air maximum temperature
86 °F (30 °C)
Backpressure:
Maximum permissible backpressure
(duct static pressure and line backpressure)
6 in H2O (1.49 kPa) compact unit
10 in H2O (2.49 kPa) full-size unit
Gas Operating Pressure:
86
Natural gas
4.5-10.0 in H2O (1.1-2.4 kPa)
Propane
9.0-13.0 in H2O (2.2-3.2 kPa)
Product Specifications
2583701_C_EN_1812_Nortec-GS_OM
Nortec GS
Water Supply:
Water pressure (regulated)
30-80 psig (207-550 kPa)
Flow rate
2.6 gpm (10 L/min) for GS 50-300, 5.3 gpm (20 L/min) for GS 450/600
Water temperature
34-59 °F (1-15 °C) recommended; maximum 77 °F (25 °C)
Water quality
Cold potable water filtered to 5 μm (optional), hardness of 0-256 ppm, pH level
between 5-8 and chloride content 0-50 ppm.
Drain Water:
Drain water temperature
140 °F (60 °C) maximum
Drainage capacity
5.3 gpm (20 L/min)
Power:
Maximum current draw
10.3
Size and Weight
Nortec GS
Model
GS 50-CS
GS 50-NX
GS 100-CS
GS 100-NX
GS 150-CS
GS 150-NX
GS 200-CS
GS 200-NX
GS 300-CS
GS 300-NX
GS 450-CS
GS 450-NX
GS 600-CS
GS 600-NX
Nortec GS
15 A
Weight
Size – H × W × D
in (mm)
Net
lb (kg)
Operating
lb (kg)
190 (86.2)
340 (154.2)
210 (95.3)
365 (165.6)
320 (145.1)
500 (226.8)
480 (217.7)
775 (351.5)
480 (217.7)
800 (362.8)
800 (362.9)
1200 (544.3)
55.5 × 62.2 × 27.7
(1410 × 1580 × 705)
910 (412.8)
1550 (703.1)
55.5 × 73.2 × 27.7
(1410 × 1859 × 705)
43.4 × 23.5 × 21.2
(1102 × 598 × 539)
55.5 × 27 × 27.7
(1410 × 684 × 705)
55.5 × 37.8 × 27.7
(1410 × 960 × 705)
2583701_C_EN_1812_Nortec-GS_OM
Product Specifications
87
A
Appendix
A.1
Torque Values
Figure A1 shows the hardware in the Nortec GS humidifier that MUST be torqued to the values shown in
Table A1 on page A-89.
1
10
9
8
7
1
6
5
4
3
2
Figure A1: Nortec GS Hardware to be Torqued
1
2
3
4
5
88
Appendix-A
Bolt, M6×12, flange-head (qty. 4)
Stud, M6x30 (Bolt, M6×16, hex-head, for older units)
(qty. 4)
Bolt, M6×12, hex-head (qty. 4)
Bolt, M8×25, hex-head (qty. 8)
Bolt, M8×25, hex-head (qty. 1)
6
7
8
9
10
Bolt, M6×16, hex-head (qty. 1)
Bolt, M6×14, hex-head (qty. 9)
Bolt, M6×10, socket-head (qty. 14)
Nut, M5, hex-head (qty. 4)
Bolt, M5×16, hex-head (qty. 4)
2583701_C_EN_1812_Nortec-GS_OM
Nortec GS
Table A1: Nortec GS Standard Torque Values
Figure A1
Item
Number
Fastener and Location
Quantity
Anti-Seize
Lubricant*
Torque
Re-torque
1
Bolt, M6×12, flange-head,
stainless steel – secondary
heat-exchanger/exhaust flange
bolts
4
per flange
–
15 in·lb (1.7 N·m)
15 in·lb (1.7 N·m)
2
Stud, M6×30 and serrated
flange nut (replace the M6x16
bolts in older units) – primary
heat-exchanger bottom flange
bolts
4
per heatexchanger

Tighten until metal to
metal contact occurs.
DO NOT EXCEED
130 in·lb (14.7 N·m)
DO NOT EXCEED
130 in·lb (14.7 N·m)
3
Bolt, M6×12, hex-head, stainless steel – drain fitting flange
bolts
4
per unit

30 in·lb (3.5 N·m)
4
Bolt, M8×25, hex-head, stainless steel – tank cover side and
bottom bolts
8-10
per door

20 in·lb (2.3 N·m)
then secure jam nut
10 in·lb (1.2 N·m)
5
Bolt, M8×25, hex-head, stainless steel – tank cover top bolt
1-3
per door

10 in·lb (1.2 N·m)
then secure jam nut
10 in·lb (1.2 N·m)
6
Bolt, M6×40, hex-head, stainless steel – tank cover top
bracket bolt
1-3
per door

35 in·lb (3.9 N·m)
35 in·lb (3.9 N·m)
7
Bolt, M6×14, hex-head, stainless steel – burner flange bolts
9
per burner

4 in·lb (0.5 N·m)
4 in·lb (0.5 N·m)
8
Bolt, M6×10, socket-head,
stainless steel – primary heatexchanger top flange bolts
14
per heatexchanger

110 in·lb (12.4 N·m)
110 in·lb (12.4 N·m)
9
Nut, M5, hex-head, galvanized
steel – blower tube
4
per burner
–
10 in·lb (1.2 N·m)
10 in·lb (1.2 N·m)
10
Bolt, M5×16, hex-head, galvanized steel – blower tube
4
per blower
–
10 in·lb (1.2 N·m)
10 in·lb (1.2 N·m)
Do not Re-Torque
(Inside tank)
* Apply nickel anti-seize lubricant (Loctite® LB 771™ or equivalent) to fastener.
A.1.1
Torque Sequences
M6x40
1
9
2
3
M8x25
M8x25
M8x25
M8x25
6
4
M8x25
13
M8x25
5
M8x25
5
1
3
11
M8x25
M6x40
M6x40
M6x40
M8x25
15
M8x25
7
6
2
4
M8x25
M8x25
M8x25
9
M8x25
M8x25
10
8
M8x25
12
10
M8x25
M8x25
M8x25
7
8
M8x25
16
14
M8x25
M8x25
M8x25
18
11
12
M8x25
M8x25
17
M8x25
Figure A2: Tank Cleanout Door Torque Sequence. Small and large doors shown.
Nortec GS
2583701_C_EN_1812_Nortec-GS_OM
Appendix-A
89
M6x14
5
7
8
M6x14
M6x14
3
4
M6x14
M6x14
2
1
M6x14
M6x14
9
10
6
M6x14
M6x14
M6x40
Figure A3: Burner Assembly Torque Sequence.
M6x10
M6x10
M6x10
M6x10
14
3
5
12
7
10
M6x10
M6x10
1
2
M6x10
M6x10
9
8
M6x10
M6x10
11
6
4
13
M6x10
M6x10
M6x10
M6x10
Figure A4: Primary Heat Exchanger Torque Sequence.
90
Appendix-A
2583701_C_EN_1812_Nortec-GS_OM
Nortec GS
Warranty
Condair Inc. and/or Condair 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, are free from
defects in material and workmanship. No warranty is made against corrosion, deterioration, or suitability of
substituted materials used as a result of compliance with government regulations.
THE COMPANY’s obligations and liabilities under this warranty are limited to furnishing replacement parts
to the customer, F.O.B. THE COMPANY’s factory, providing the defective part(s) is returned freight prepaid
by the customer. Parts used for repairs are warranted for the balance of the term of the warranty on the
original humidifier or 90 days, whichever is longer.
The warranties set forth herein are in lieu of all other warranties expressed or implied by law. No liability
whatsoever shall be attached to THE COMPANY until said products have been paid for in full and then
said liability shall be limited to the original purchase price for the product. Any further warranty must be in
writing, signed by an officer of THE COMPANY.
THE COMPANY’s parts or materials that are considered consumables, including but not limited to: cylinders,
filters, nozzles, membranes, media, gaskets, O-rings, etc. are NOT covered by the warranty.
THE COMPANY makes no warranty and assumes no liability unless the equipment is installed in strict
accordance with a copy of the catalog and installation manual in effect at the date of purchase and by a
contractor approved by THE COMPANY to install such equipment.
THE COMPANY makes no warranty and assumes no liability whatsoever for consequential damage or damage resulting directly from misapplication, incorrect sizing or lack of proper maintenance of the equipment.
THE COMPANY makes no warranty and assumes no liability whatsoever for damage resulting from freezing
of the humidifier, supply lines, drain lines, or quality of the water used.
THE COMPANY retains the right to change the design, specification and performance criteria of its products
without notice or obligation.
THE COMPANY’s limited warranty on accessories, not of the companies manufacture, such as controls,
humidistats, pumps, etc. is limited to the warranty of the original equipment manufacturer from date of
original shipment of humidifier.
Extended Warranty
Extended warranties are available to purchase under the conditions listed above.
CONSULTING, SALES AND SERVICE:
U.S.A.
835 Commerce Park Drive
Ogdensburg, NY 1366-2209
CANADA
2740 Fenton Road
Ottawa, ON, K1T 3T7
Tel: 1.866.667.8321
Fax: 613.822.7964
Email: [email protected]
Website: www.condair.com
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