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Nortec GS Series Operation And Maintenance Manual

Gas-fired steam humidifier
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IMPORTANT! Read and save these instructions. This manual to be left with the equipment.
OPERATION AND
MAINTENANCE MANUAL
Gas-fired Steam Humidifier
Nortec GS
Humidification and Evaporative Cooling

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Summary of Contents for Nortec GS Series

  • Page 1 IMPORTANT! Read and save these instructions. This manual to be left with the equipment. OPERATION AND MAINTENANCE MANUAL Gas-fired Steam Humidifier Nortec GS Humidification and Evaporative Cooling...
  • Page 2 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 va- pors and liquids in the vicinity of the humidifier or any other appliance.
  • Page 3 OPERATION AND MAINTENANCE MANUAL Gas-fired Steam Humidifier Nortec GS 2583701_B_EN_1608...
  • Page 4 Proprietary Notice This document and the information disclosed herein are proprietary data of Nortec Humidity Ltd. Neither this docu- ment, nor the information contained herein shall be reproduced, used, or disclosed to others without the written authorization of Nortec Humidity Ltd., except to the extent required for installation, operation or maintenance of the customer's equipment.
  • Page 5 6.2.1 Filling the System 6.2.2 Ignition Safety Shutoff Test 6.2.3 Starting the Humidifier 6.2.4 Remote Monitoring 6.2.5 Inspections During Operation 6.2.6 Manually Initiate Tank Draining 6.2.7 Full Tank Blowdown 6.2.8 Shutting Down 6.2.9 Restarting After Shutdown 2583701_B_EN_1608 Nortec GS Contents...
  • Page 6 7.5.8 Replacing Internal Fuse 7.5.9 Resetting Service Reminder Installing Software Updates Fault Isolation General Fault Indication General Troubleshooting Nortec GS Warning and Fault List Resetting Fault Status Driver Board Layout Integrated Control Board Layout Wiring Diagrams Decommissioning 10.1 General 10.2 Removal from Service for Disposal or Long-term Storage 10.3...
  • Page 7 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.
  • Page 8 Keep this manual in a place where it is safe and readily accessible. If the equipment is moved to another location, make sure that the manual is passed on to the new user. If the manual is lost or misplaced, contact your Nortec representative for a replacement copy. Language Versions This manual is also available in other languages.
  • Page 9 Installation Manual, and the Operation and Maintenance Manual is a basic requirement for protect- ing 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 quali- fied, well trained and are authorized by the customer.
  • Page 10 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.
  • Page 11 Preventing Unsafe Operation If it is suspected that the Nortec GS steam humidifier cannot be operated safely for any of the reasons "Shutting Down" on page 49 listed below, shut it down immediately as described in and secure it against accidental power-up.
  • Page 12 This page intentionally left blank 2583701_B_EN_1608 Nortec GS...
  • Page 13 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.
  • Page 14 Dual fill valve Secondary heat-exchanger on CS and NX models only. 29 30 Figure 3: Nortec GS Humidifier Components (GS 150 shown) Note: Door, side and top panels removed for clarity. Vent, exhaust 18 Switch, On/Off Hose, dual fill valve to fill box...
  • Page 15 Water Management The Nortec GS humidifier is equipped with a combination fill box and unique float chamber water level monitoring device. Two magnetic floats (one is a backup) measure five different water levels in the hu- midifier for proper operation.
  • Page 16 Figure 4: Nortec GS General System Overview 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 Drain line, condensate (with trap) Funnel (with trap)
  • Page 17 Commissioning The unit must always be commissioned for the first time by a service technican from your Nortec repre- sentative, or by personnel who are well trained and authorized by the customer. The steps are in the following order: 1.
  • Page 18 This page intentionally left blank 2583701_B_EN_1608 Nortec GS Commissioning...
  • Page 19 Operator Interface 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 a description of each of these elements.
  • Page 20 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.
  • Page 21 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. 2583701_B_EN_1608 Nortec GS Operator Interface...
  • Page 22 The humidifier is in standby mode, and the function is activated. Disabled The Nortec GS humidifier is disabled by the BMS (building management system). Stopped The humidifier is stopped because a condition with a "Fault" status is active. Safety Chain Open One or more contacts in the external security loop is open, so the humidifier has stopped producing steam.
  • Page 23 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.
  • Page 24 Figure 6 on page 14) to view the system infor- Select the <About> button on the Home screen (refer to mation for your Nortec GS. The tab structure for this selection is shown below. "General Tab" on page 18 About >...
  • Page 25 Select the field to adjust the "PI Control Parameters Tab" on page 28 setpoint value. Refer to for more details. Note: This field appears only if Control Mode is set to "RH P" or "RH PI". 2583701_B_EN_1608 Nortec GS Operator Interface...
  • Page 26 FTBD (Full Tank Blowdown): shows the configura- tion setting of the full tank blowdown function. Select the "Water field to enable or disable the function. Refer to the Management Tab" on page 23 for more details. 2583701_B_EN_1608 Nortec GS Operator Interface...
  • Page 27 Node ID: shows the node ID assigned to the humidifier over the BACnet/IP protocol. – BACnet MSTP MAC: shows the MAC address assigned to the humidifier. – IP Address: shows the IP address assigned to the humidifier. 2583701_B_EN_1608 Nortec GS Operator Interface...
  • Page 28 "General Service Tab" on page 38 "Fault/Service History Tab" on page 38 "Diagnostics Tab" on Input Diagnostics page 39 > Output Diagnostics "Administrator Menu" on "Password Setting Tab" on page 42 page 42 > "Software Settings Tab" on page 42 2583701_B_EN_1608 Nortec GS Operator Interface...
  • Page 29 5.2.7.1 Configuration Menu The Configuration menu lets you configure the operation of the Nortec GS humidifier. The menu and Table 6 on page 22 sub-menu items are discussed below. Refer to for the menu structure. Features Menu Each tab under the Features menu is discussed below.
  • Page 30 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. Setting range: 1-100 hours Factory setting: 72 hours 2583701_B_EN_1608 Nortec GS Operator Interface...
  • Page 31 Fill Correction 1: allows you to adjust all the parameters for the high volume fill valve(s) to compensate for valve tolerances, as welll as site-specific conditions. CAUTION! Do not adjust this value unless instructed to do so by a Nortec representative. Setting range: 0.1-10.0 Factory setting: –...
  • Page 32 BMS via the BACnet/IP communication protocol. BACnet/MSTP – the control signal is from the BMS via the BACnet/MSTP communication protocol. LonWorks – the control signal is from the BMS via the LonWorks commu- nication protocol. Factory setting: Analog 2583701_B_EN_1608 Nortec GS Operator Interface...
  • Page 33 "Analog". Channel 2 applies only Control Channels when is set to "Dual". Options: 0-5 V, 1-5 V, 0-10 V, 2-10 V, 0-20 V, 0-16 V, 3.2-16 V, 0-20 mA, 4-20 mA Factory setting: 0-20 V 2583701_B_EN_1608 Nortec GS Operator Interface...
  • Page 34 P/PI controller as a percentage of relative humidity (% RH) within which the humidifier will modulate between 0 and 100% output. CAUTION! Do not adjust this value unless instructed to do so by a Nortec representative. Setting range: 6-65% Factory setting: –...
  • Page 35 The RH Signal warning mes- sage is triggered when the signal value drops below this limit, and humidification stops. Setting range: 1-10% Factory setting: 2583701_B_EN_1608 Nortec GS Operator Interface...
  • Page 36 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 humidi- fiers in the Linkup chain. Setting range: Factory setting: 2583701_B_EN_1608 Nortec GS Operator Interface...
  • Page 37 0-100% Factory setting: 100% Note: This setting can only be modified if more than one unit is physically connected to the Linkup chain. "Configuring for Multi-Unit Operation" on page 44 Refer to for setup procedure. 2583701_B_EN_1608 Nortec GS Operator Interface...
  • Page 38 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 2583701_B_EN_1608 Nortec GS Operator Interface...
  • Page 39 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 IP Type only if is set to "Fixed". 2583701_B_EN_1608 Nortec GS Operator Interface...
  • Page 40 MAC Address: displays the MAC (media access con- – trol) address for the Nortec GS humidifier. – Host Name: displays the host name for the Nortec GS humidifier. 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.
  • Page 41 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 communica- tions protocol. Factory setting: 2583701_B_EN_1608...
  • Page 42 The following settings appear only if BACnet is set to "BACnet/IP" or "MSTP". Note: When set to BACnet MSTP the Nortec GS humidifier communicates as a BACnet slave only. BACnet master functionality requires installa- tion of optional hardware. – Device Name: allows you to assign a name to the humidifier for communications over the BACnet/IP protocol.
  • Page 43 Startup Code Tab Note: This tab only appears if the humidifier is being operated for the very first time, or the startup code has been enabled. Contact Nortec to request a startup code, then enter it in the field described below. –...
  • Page 44 All previously recorded fault history is erased. – Reset Service History: 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. 2583701_B_EN_1608 Nortec GS Operator Interface...
  • Page 45 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 System Tab 2583701_B_EN_1608 Nortec GS Operator Interface...
  • Page 46 Diagnostics Tab (Input Diagnostics), continued... Blowers Tab 2583701_B_EN_1608 Nortec GS Operator Interface...
  • Page 47 Note: The diagnostic menu will only be displayed after you acknowledge the warning message that the hu- midifier will be placed in standby mode. Output Diagnostics Tab Remote Relays Tab 2583701_B_EN_1608 Nortec GS Operator Interface...
  • Page 48 A warning message is displayed asking you to confirm if you want to proceed with restoring the settings. CAUTION! All current configurations of the unit will be permanently lost, and replaced with factory settings. 2583701_B_EN_1608 Nortec GS Operator Interface...
  • Page 49 Software Configuration The Nortec GS humidifier is shipped fully configured from the factory to suit your site-specific require- ments, but this can be modified as needed. This section provides the necessary instructions to recon- figure the control software. 5.3.1 Configuring the Control Software Perform the basic setup of the control software as follows, if necessary: 1.
  • Page 50 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 Nortec's Linkup system to satisfy large humidi- fication 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.
  • Page 51 6.2.1 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.
  • Page 52 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. 2583701_B_EN_1608 Nortec GS Operation...
  • Page 53 6.2.4 Remote Monitoring The Nortec GS humidifier can be monitored remotely through the remote fault board wired to a remote Table 7 monitoring system. describes the function of each relay when triggered. Table 7: Remote Relay Function Remote Relay Description...
  • Page 54 Close the drain valve after emptying the tank. 6.2.7 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.
  • Page 55 8. Wait for the unit to cool down to a safe temperature before performing any maintenance inside the plumbing cabinet. 6.2.9 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: DANGER! Risk of harm to personnel or damage to property.
  • Page 56 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. "Starting the Humidifier" on page 10. Start up the humidifier as described in 2583701_B_EN_1608 Nortec GS Operation...
  • Page 57 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.
  • Page 58 Mandatory Maintenance Schedule Table 8 lists the mandatory maintenance schedule for the Nortec GS humidifier. Table 8: Mandatory Maintenance Schedule 30 Days End of After Mid-Sea- Task Season Maintenance Initial (2000 hrs) Start-up Inspect drainage. Perform a visual check of the drainage system, including the air gap funnel and drainage into the building drain.
  • Page 59 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).
  • Page 60 Blowdown Rate c. Set the on the Nortec GS humidifier to the higher of the two noted values. 3. Set the FTBD interval as follows: Table 11, and make a note of the recommended maximum FTBD interval value for the a.
  • Page 61 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 bot- tom 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.
  • Page 62 Screw, (×4) typical Panel, right side Top tab, door panel Notch, cabinet Tab, side panel Notch, door panel Screw, captive Door panel, control cabinet Door panel, plumbing cabinet 10 Panel, left side 11 Panel, fixed rear 2583701_B_EN_1608 Nortec GS Maintenance...
  • Page 63 Use a soft-bristled brush (not wire brush) to remove scale build-up. Replace the anode, if necessary. 10. Install a new tank gasket (Nortec does not recommend reusing the tank gasket), and secure the tank cover to the tank with the four clamps as follows: a.
  • Page 64 Sensor, temperature Clamp, left side Hose, fill box to tank (main) Cover, tank Valve, manual shutoff 10 Gasket, tank Fitting, drain 11 Clamp, top Clamp, right side 12 Tank Anode, sacrificial 13 Coils, primary heat-exchanger Clamp, bottom 2583701_B_EN_1608 Nortec GS Maintenance...
  • Page 65 Disinfectants may only be used if they do not leave behind toxic residue. Rinse all parts thor- oughly with clean tap water after cleaning. Figure 12: Cleaning Secondary Heat-exchanger (CS/NX Model Only) Hose, secondary heat-exchanger to tank Hose, micro-pump to secondary heat-exchanger Trap, condensate Micro-pump Heat-exchanger, secondary 2583701_B_EN_1608 Nortec GS Maintenance...
  • Page 66 9. Check for leaks. 7.5.4 Cleaning the Float Chamber Figure Clean the float chamber in the fill box as follows. Refer to Figure 13: Cleaning Float Chamber Screw (×6) Gasket Sleeve, float Fill box Float (×2) Cap, end 2583701_B_EN_1608 Nortec GS Maintenance...
  • Page 67 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. "Restarting After Shutdown" on page 7. Re-start the humidifier – refer to 8. Check for leaks. 2583701_B_EN_1608 Nortec GS Maintenance...
  • Page 68 13 Hose, fill box to tank Fitting, drain 14 Board, float O-ring 15 Fill box Setscrew 16 Adaptor, Fill Cover, pump 17 Hose, overflow Housing, pump 18 Hose, inlet Hose, manual drain 10 Hose, fill box to drain pump 2583701_B_EN_1608 Nortec GS Maintenance...
  • Page 69 7.5.6 Cleaning the Burner Assembly The burner(s) in the Nortec GS humidifier does not require maintenance. However, if the burner(s) is not Figure operating properly, clean the burner(s) and spark-igniter as described below. Refer to WARNING! Risk of severe injury to personnel, or property damage! Prevention: Follow proper shutdown procedure before cleaning the burner(s).
  • Page 70 Replacing Backup Battery DANGER! Risk of electric shock! 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"...
  • Page 71 Figure 16: Backup Battery Replacement Panel, front Battery – 3V (CR 2032) Board, integrated control 2583701_B_EN_1608 Nortec GS Maintenance...
  • Page 72 Replacing Internal Fuse DANGER! Risk of electric shock! 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. "Shutting Down" on page 49...
  • Page 73 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. 2583701_B_EN_1608 Nortec GS Maintenance...
  • Page 74 DANGER! Risk of electric shock! Nortec GS is mains powered. Live parts may be exposed when the door panel is re- moved. 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.
  • Page 75 Fault Isolation 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 Nortec 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.
  • Page 76 Nortec GS humidifier. For detailed trouble- shooting 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...
  • Page 77 Humidifier Table 14: General Troubleshooting – Nortec GS Humidifier Problem Probable Cause Corrective Action(s) Nothing happens when the Incorrect voltage, or no voltage. – Check the disconnect switch in the supply line. On/Off switch is turned On. – Check the fuse between the transformer and the On/ Off switch.
  • Page 78 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 condi- tion is not resolved within a certain period of time.
  • Page 79 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 "Resetting Service Reminder" on page 2583701_B_EN_1608 Nortec GS Fault Isolation...
  • Page 80 – Adjust the RH Low value for the signal may be set too high. sensor signal. Unit may be in standby mode. – Check the safety loop is closed, and that all burners are operational. 2583701_B_EN_1608 Nortec GS Fault Isolation...
  • Page 81 "Cleaning the Float Chamber" on page – Startup Code Activation code required to use the humidifier. Activation code missing. – Contact your Nortec representative. – Driver Board Fault No communication between the integrated control board and the driver board. Communication cable between the –...
  • Page 82 Contact your Nortec representative for further assistance. Temperature of the water supply may – Check that the temperature of be too high.
  • Page 83 – three flashes of the red LED indicate problem with the supply, or gas valve, or a loose connection. Contact your Nortec repre- sentative if further assistance is required. Faulty ignition control module. – Check the status LED on the ignition control module –...
  • Page 84 If 24 VAC voltage is detected at "V2" but not at "TH", replace the gas valve. Contact Nortec to order a replacement gas valve. – E144 Float Level On three consecutive occasions, more than one float level was registering at the same time.
  • Page 85 If neces- sary, 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 2583701_B_EN_1608 Nortec GS Fault Isolation...
  • Page 86 – Restart the unit, and check the missing. blower rpm in Input Diagnostics in the control software. If the rpm is low, contact your Nortec representative. Restrictions at blower, or damaged – Visually inspect the blower and blower. blower inlet for restrictions.
  • Page 87 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. 2583701_B_EN_1608 Nortec GS Fault Isolation...
  • Page 88 Driver Board Layout Figure 19 Section 8.4, "Nortec GS Warning shows the components of the driver board that are referenced in and Fault List" of this manual. TP33 TP20 REL3 TP19 TP18 TP21 REL10 TP22 LED9 TP11 LED1 TP17 TP12...
  • Page 89 Figure 21: Wiring Diagram - Nortec GS 50/100/150/200/300 JP4 Jumper, for activating the termination resistor for Modbus or BACnet MSTP network. Connector, Modbus (RS485 interface) JP7 Jumper, for activating Modbus or BACnet MSTP communication via connector J6.
  • Page 90 Figure 22 shows the supplementary wiring diagram for the Nortec GS 450/600. Connections are carried Figure 21 on page over from Legend: Continued from Continued from Continued from Wire Colors previous wiring diagram previous wiring diagram previous wiring diagram R - Red...
  • Page 91 Decommissioning 10.1 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.
  • Page 92 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: •...
  • Page 93 6 in H2O (1.49 kPa) compact unit (duct static pressure and line backpres- 10 in H2O (2.49 kPa) full-size unit sure) Gas Operating Pressure: 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) 2583701_B_EN_1608 Nortec GS Product Specifications...
  • Page 94 GS 450-CS 55.5 × 62.2 × 27.7 800 (362.9) 1200 (544.3) (1410 × 1580 × 705) GS 450-NX GS 600-CS 55.5 × 73.2 × 27.7 910 (412.8) 1550 (703.1) (1410 × 1859 × 705) GS 600-NX 2583701_B_EN_1608 Nortec GS Product Specifications...
  • Page 95 Appendix 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-ii. Figure A1: Nortec GS Hardware to be Torqued Bolt, M6×12, flange-head (qty. 4) Bolt, M6×14, hex-head (qty.
  • Page 96 Table A1: Nortec GS Standard Torque Values Figure A1 Anti-Seize Item Fastener and Location Quantity Torque Lubricant* Number Bolt, M6×12, flange-head, – 30 in·lb (3.5 N·m) stainless steel – secondary heat-exchanger/exhaust flange bolts Bolt, M6×14, hex-head, stain- 45 in·lb (5.1 N·m) ...
  • Page 97 Warranty Nortec Humidity Inc. and/or Nortec Humidity 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 war- ranted, are free from defects in material and workmanship.
  • Page 98 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.NORTEC1 Fax: 613.822.7964 Email: nortec@humidity.com Website: www.humidity.com...

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