Nortec GS Installation Manual
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Nortec GS Installation Manual

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

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  • Page 1 IMPORTANT! Read and save these instructions. This manual to be left with the equipment. INSTALLATION 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 this or any other appliance.
  • Page 3 INSTALLATION MANUAL Gas-fired Steam Humidifier Nortec GS 2583703_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: Table Of Contents

    Installing Exhaust Condensate Drain Line (CS/NX Model Only) 5.6.4 Water Connection Requirements 5.6.5 Water Connections Checklist Combustion Air Connection 5.7.1 Space Air Installation 5.7.2 Sealed Combustion Installation 5.7.2.1 Sealed Combustion Installation Requirements 5.7.3 Combustion Air Checklist 2583703_EN_1608 Nortec GS Contents...
  • Page 6 Control Device Locations 5.10.2 Permissible Control Signal Inputs 5.11 Electrical Connections 5.11.1 General 5.11.2 Wiring Diagrams 5.11.2.1 Nortec GS 50/100/150/200/300 5.11.2.2 Nortec GS 450/600 5.11.3 External Connections 5.11.3.1 External Security Loop 5.11.3.2 Modulating Demand or Humidity Signal 5.11.3.3 On/Off Humidistat Signal 5.11.3.4...

  • Page 7: Introduction

    This manual is restricted to the installation of the Nortec GS humidifier, and is intended for well trained personnel who are suitably qualified for their respective tasks.
  • 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: For Your Safety

    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 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 Figure The location of the various safety labels on the Nortec GS humidifier is shown in Figure 1: Safety Labels Label, gas safety warning Label, keep cabinet closed warning Label, installation guidelines Label, general safety warning Label, specification 2583703_EN_1608 Nortec GS...
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  • Page 13: Receiving And Storage

    Receiving and Storage Inspection All Nortec products are shipped F.O.B at the factory. All damage, breakage or loss claims are the re- sponsibility of the shipping company. After receiving the shipment, inspect the goods as follows: – Inspect the shipping boxes for damage. Report any shipping box damages to the shipping company without delay.
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  • Page 15: Product Overview

    Product Overview General Description The Nortec GS series is a completely new design of gas-fired steam humidifiers. It is designed to provide clean steam humidification at an economical price. The Nortec GS humidifier is available in condensing high-efficiency (CS), ultra-low NOx condensing (NX) and standard-efficiency models in capacities rang- ing from 50 lb/h (23 kg/h) to 600 lb/h (260 kg/h).

  • Page 16: Model Designation

    Model Designation The specification label on the right side of the Nortec GS humidifier shows its model number, serial Figure number and ratings – refer to Figure 3: Nortec GS Humidifier Specification Label Figure The breakdown of the model number is shown in...

  • Page 17: Model Specifications

    Model Specifications Table 1 Table 2 on page 12 "High Altitude list the specifications for the Nortec GS humidifier. Also, refer to De-rating" on page 13 for high altitude de-rating of the Nortec GS humidifier Condensing High-efficiency (CS) Model Specifications...
  • Page 18 Table 2: Ultra-Low NOx Condensing (NX) Model Specifications Input Steam Capacity Manifold Pressure Fuel Blower Speed BTUh (kW) lb/h (kg/h) in H2O (Pa) Model GS 50-NX Natural gas Maximum 65,000 (19.0) 50 (23) -0.01 (-2.5) Minimum 13,000 (3.8) 10 (4.6) -0.01 (-2.5)

  • Page 19: High Altitude De-Rating

    Application Mounting stand Stand for independent mounting of the Nortec GS humidifier on the floor. Natural gas or propane Factory-installed gas valve for using either natural gas or propane in the Nortec GS humidi- fier. Accessories Table 5 shows the accessories for the Nortec GS humidifier. Contact your Nortec representative for details.
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  • Page 21: Installation

    Touching live parts may cause severe injury or even death. Prevention: The Nortec GS humidifier must be connected to the mains only after all installation work has been completed, checked for correct workmanship, and the access panels are installed properly and fastened securely.

  • Page 22: Installation Overview

    25 Vent, exhaust (connected to exterior) 11 Inlet, intake air 26 Vent, air intake (connected to exterior – optional) 12 Inlet, gas 27 Distributor, steam 13 Supply line, water 28 Switch, air proving (external security loop) 14 Trap, sediment 2583703_EN_1608 Nortec GS Installation...

  • Page 23: Typical Installation - Full-Size Units

    Typical Installation – Full-Size Units 1, 2 2, 5 Figure 6: Installation Overview – Full-Size Units (GS 150 Shown) Humidistat, On/Off (used for humidity control) 13 Valve, water shutoff Humidity sensor or modulating humidistat (used for control 14 Supply line, water...

  • Page 24: Site Requirements

    Water Supply … The water supply to the humidifier must be cold potable drinking water or demineralized water, with a flow rate of 2.6 gpm (10 L/min) for Nortec GS 50-300 unit or 5.3 gpm (20 L/min) for Nortec GS Table 450/600 unit.
  • Page 25 … The gas supply line must be sized as listed in threads. Table 8: Gas Line Size Model Minimum Gas Line Size Gas Inlet Size (Female) GS 50 1/2 in (15 mm) 1/2 in NPT GS 100 1/2 in (15 mm) 1/2 in NPT...

  • Page 26: Mounting The Humidifier

    The required clearances are listed in Table 10 on page 21. Refer to Figure 7. Consult local and national installation regulations. Nortec does not accept responsibility for violations of the installation codes. Figure 7: Nortec GS Humidifier Suggested Clearances 2583703_EN_1608...

  • Page 27: Overall Dimensions And Weight

    Table 11. Note: The dimen- The overall dimensions and weight of the Nortec GS humidifier are listed in sions and weights shown do not include the floor stand or wall mount bracket. Table 11: Nortec GS Humidifier Overall Dimensions and Weights...

  • Page 28: Standard Wall Mounting - Compact Unit Only

    5.4.2 Standard Wall Mounting – Compact Unit Only Install the compact Nortec GS humidifier on the wall or other suitable vertical mounting surface as fol- Figure 8 on page lows. Refer to 1. Check that the selected mounting location provides adequate clearances for maintenance, and is "Clearances"...
  • Page 29 Bolt, M6×12 (×4, supplied) Washer, flat, M6 (×4, supplied) Washer, flat, 1/4 in (×2, not supplied) Bolt, lag, 1/4×1 in (×2, not supplied) Screw, sheetmetal (×4, supplied) Bracket, L (×2, supplied) 10 Screw, shipping (×2, discard) 2583703_EN_1608 Nortec GS Installation...

  • Page 30: Standard Floor Stand Mounting - Compact Unit Only

    1. Check that the selected mounting location provides adequate clearances for maintenance. Refer to "Clearances" on page 2. Remove all the packaging material around the Nortec GS humidifier that was used for shipping the unit. Remove the accessory box and open its contents.
  • Page 31 Bolt, lag, 1/4×1 in (×2, not supplied) Washer, flat, 1/4 in (×2, not supplied) Bracket, L (×2, supplied – used if unit is installed against a vertical mounting surface) 10 Screw, sheetmetal (×4, supplied) 11 Screw, shipping (×2, discard) 2583703_EN_1608 Nortec GS Installation...

  • Page 32: Standard Mounting - Full-Size Unit

    1. Check that the selected mounting location provides adequate clearances for maintenance. Refer to "Clearances" on page 2. Remove all the packaging material around the Nortec GS humidifier that was used for shipping the unit. WARNING! Heavy object – risk of personal injury, or damage to equipment! Prevention: Use an appropriate lifting device to lift the humidifier.

  • Page 33: Optional Stand Mounting - Full-Size Unit

    1. Check that the selected mounting location provides adequate clearances for maintenance. Refer "Clearances" on page 2. Remove all the packaging material around the Nortec GS humidifier that was used for shipping the unit. Remove the accessory box and open its contents.

  • Page 34: Mounting Checklist

    … Unit installed in the correct location (according to "Clearances" on page 20)? … Adequate clearance for servicing unit? … Mounting surface stable, and capable of supporting the full operating weight of the humidifier? … Unit level? … Unit secured properly? 2583703_EN_1608 Nortec GS Installation...

  • Page 35: Steam Connection

    Steam Connection Steam generated by the Nortec GS humidifier can be distributed into a conditioned space through an air handling unit (AHU) using Nortec steam distributors, blower packs or Nortec SAM-e steam distribution manifolds – refer to their respective manuals for installation details.

  • Page 36: Best Practices For Installing Steam And Condensate Lines

    Figure 13 on page – Use only Nortec steam hose between the steam outlet on the humidifier and the steam distributor. Other types of steam hoses can affect performance of the unit, and may void the warranty. The length of the steam hose must be kept to a minimum. The minimum bend radius of the steam hose is 300 mm.
  • Page 37 Do not over-tighten the gear clamp. The maximum torque value for gear clamps is 16 in·lbs (180 N·cm). – Do not combine multiple steam lines, except at the steam distributor. Use a Nortec adaptor specifically designed for that purpose, and only if the humidifiers connected to the adaptor operate in parallel. –...
  • Page 38 Condensate Lines – Use 1/2 in Nortec condensate hose, or 1/2 in stainless steel pipe or copper pipe for condensate lines and traps. WARNING! Risk of severe burns from contact with hot fluids or steam! The condensate lines may be filled with hot fluids or steam. Bare skin in contact with hot fluids or steam can result in severe burns.

  • Page 39: Common Steam And Condensate Line Installation Mistakes

    The steam line does not run straight up for the required minimum 12 in (300 mm) before continuing on to the steam distributor. Steam line is not sloped – upslope minimum 10° /downslope minimum 2° is not maintained. The required long radius elbow (for rigid pipe) is not used. 2583703_EN_1608 Nortec GS Installation...

  • Page 40: Steam Connection Checklist

    … Steam line does not reduce in diameter except at the steam distributor; and condensate line installed just before the restriction? … Steam lines do not merge except at the steam distributor through a Nortec adaptor? … Steam line does not sag? …...

  • Page 41: Water Connections

    1-1/2 in (38 mm) Hose, drain, 7/8 in (22 mm) I.D. (not supplied) – minimum downslope of 1.2°, and must not touch sides or bottom of funnel Clamp, hose (not supplied) Outlet, drain, 7/8 in (22 mm) O.D. (unthreaded) 2583703_EN_1608 Nortec GS Installation...

  • Page 42: Water Connections - Full-Size Unit

    Hose, drain, 7/8 in (23 mm) I.D. (not supplied) – minimum downslope of 1.2°, and must not touch sides or bottom of funnel Funnel, air gap – should be minimum 2-1/2 in (64 mm) in diameter, and drain pipe connected to it should have minimum diameter of 1-1/2 in (38 mm) 2583703_EN_1608 Nortec GS Installation...

  • Page 43: Installing Exhaust Condensate Drain Line (Cs/Nx Model Only)

    Hose, drain, exhaust condensate (compact unit) – (not supplied) must have minimum downslope of 1.2°, and must not touch sides or bottom of funnel. Use Nortec condensate hose. Funnel, air gap – funnel must be located below the condensate outlet Outlet, condensate drain (full-size unit), 1/2 in (13 mm) O.D.

  • Page 44: Water Connection Requirements

    Upon completion of installation, disconnect and flush the water supply and drain lines to clear out any debris in the lines. Check the strainer in the fill valve is free of all debris. Reconnect the lines. – Prime the condensate trap inside the unit (CS/NX model only) with water. 2583703_EN_1608 Nortec GS Installation...

  • Page 45: Water Connections Checklist

    … Condensate hose installed (CS/NX model only)? Hose rated for 212 °F (100 °C)? … Condensate trap inside unit primed with water? … Water supply line and drain lines flushed? Strainer in the fill valve free of debris? 2583703_EN_1608 Nortec GS Installation...

  • Page 46: Combustion Air Connection

    Adhere to all local and national installation regulations. Note: Nortec recommends installing an elbow (fitted with a screen) at the intake air inlet on all Nortec GS 150-600 units to prevent dirt and debris from being drawn into the combustion chamber. Seal the connec- Figure tion with silicone sealant.

  • Page 47: Sealed Combustion Installation

    6 in (150 mm) GS 600 Figure 19 shows the sealed combustion connection for the compact and full-size Nortec GS humidifiers. Figure 19: Nortec GS Sealed Combustion Connection Terminal, air intake (elbow) – terminal located outside building and facing down (not supplied) Vent, intake –...

  • Page 48: Sealed Combustion Installation Requirements

    … All relevant national and local regulations for sealed combustion installation satisfied? … Intake vent length does not exceed an equivalent length of 100 ft (30 m)? If unit is a Nortec GS 50 using propane gas, is it limited to 50 ft (15 m)? Maximum six bends?

  • Page 49: Exhaust Vent Connection

    Other requirements are listed in 5.8.1 General Requirements The exhaust vent system used with the Nortec GS series humidifier must satisfy the following requirements: – The exhaust vent systems shall be certified to UL or UL/CSA standard, and meet the installation requirements in Part 7 (Venting of Equipment) of the National Fuel Gas Code (ANSI Z223.1) in the...
  • Page 50 – The exhaust vent must not exceed an equivalent length of 100 ft (30 m), except for the Nortec GS 50 using propane gas which is limited to 50 ft (15 m). – The vent run should be as direct as possible with no more than six elbows in the system. Each 90°...
  • Page 51 11 Vent, exhaust, BH type – plastic or stainless steel. All joints air and water-tight. Short horizontal run with slope as shown (recommended, but not required). All horizontal-to-vertical transitions must include a full condensate "Tee" with condensate port and trap. 12 Vent, air intake – for optional sealed combustion vertical hookup 2583703_EN_1608 Nortec GS Installation...
  • Page 52 Drain, condensate (with trap) – minimum 12 in (300 mm) trap height, and connected to floor drain or condensate pump "Tee", condensate Hanger Vent, exhaust, BH type – plastic or stainless steel. All joints air and water-tight. Full condensate "Tee" with condensate port and trap. 2583703_EN_1608 Nortec GS Installation...

  • Page 53: Exhaust Vent Installation (Cs/Nx Model)

    5.8.2 Exhaust Vent Installation (CS/NX Model) The Nortec GS (CS/NX model) humidifier must be installed as a Category IV fan-assisted gas appliance. "Installation as a Category IV Appliance" on page 48, refer In addition to the specific requirements described in "General Requirements"...

  • Page 54: Installation As A Category Iv Appliance

    The exhaust vent must have a minimum equivalent length of 10 ft (3 m), and must not exceed an equivalent length of 100 ft (30 m), except for the Nortec GS 50 using propane gas which is limited to 50 ft (15 m). The pipe diameter must remain uniform over the entire run. The vent run should be as direct as possible with no more than six elbows in the system.

  • Page 55: Exhaust Vent Checklist

    … Exhaust vent diameter as listed in … Exhaust vent length does not exceed an equivalent length of 100 ft (30 m)? If unit is a Nortec GS 50 using propane gas, is it limited to 50 ft (15 m)? Maximum six elbows in the exhaust vent? …...

  • Page 56: Gas Connection

    Maintenance access for drain pump – do not obstruct Inlet, gas, NPT female (compact unit) Note: For Nortec GS 450/600 only, the gas line connects to a 1-1/4 to 1 in NPT adaptor (supplied) at the gas connection. 2583703_EN_1608 Nortec GS...

  • Page 57: Gas Connection Requirements

    If black pipe is used, a sediment trap must also be installed immediately upstream from the humidifier. IMPORTANT! To prevent rapid formation of rust in the stainless steel gas manifold inside the unit, Nortec recommends the use of a stainless steel section of pipe at the gas connection to the humidifier.

  • Page 58: Gas Connection Checklist

    … Stainless steel section of pipe installed at the gas connection to the humidifier? … Gas pipe routing allow clear access to other service connections at humidifier? … Gas piping adequately supported? … Gas leakage test completed, and all leaks fixed? … De-pressurize gas supply line after leak test? 2583703_EN_1608 Nortec GS Installation...

  • Page 59: Humidity Control Systems

    Humidity sensors and humidistats can be modulating or On/Off. Preferred location is in the return duct, as the supply air is well mixed with the room air at this location. Avoid placing near discharge diffuser, near doorways, in sunlight, or in airflow “dead-zones”. 2583703_EN_1608 Nortec GS Installation...

  • Page 60: Permissible Control Signal Inputs

    5.10.2 Permissible Control Signal Inputs Table 17 shows the different permissible control signal inputs the Nortec GS humidifier can handle. Table 17: Permissible Control Signal Inputs Humidity Control with External Con- Humidity Control with Internal PI Digital Inputs (via Modbus,...

  • Page 61: Electrical Connections

    Touching live parts may cause severe injury or even death. Prevention: The Nortec GS humidifier must be connected to the mains only after all installa- tion work has been completed, checked for correct workmanship, and the access panels are installed and fastened securely.

  • Page 62: Wiring Diagrams

    Figure 25: Wiring Diagram - Nortec GS 50/100/150/200/300 JP4 Jumper – for activating the termination resistor for Modbus or BACnet MSTP network. J6 Connector, Modbus (RS485 interface) JP7 Jumper – for activating Modbus or BACnet MSTP communication via connector J6.

  • Page 63: Nortec Gs 450/600

    5.11.2.2 Nortec GS 450/600 Figure 26 shows the supplementary wiring diagram for the Nortec GS 450 and GS 600. The connections are carried over from Figure 25 on page Legend: Continued from Continued from Continued from Wire Colors previous wiring diagram...

  • Page 64: External Connections

    5.11.3 External Connections This section describes the different external control signal and power connections to the Nortec GS humidifier. CAUTION! Risk of improper operation, or damage to equipment and property! Prevention: Before disconnecting the control signal cables, tag all wires. Reconnect all wires prop- erly after servicing.

  • Page 65: Modulating Demand Or Humidity Signal

    24 VAC Security Loop CH 1 CH 2 +10 VDC FTBD Figure 28: Modulating Demand or Humidity Signal Connections Modulating demand or humidity sensor signal Modulating high limit demand or humidity sensor signal (additional, for Dual channels) 2583703_EN_1608 Nortec GS Installation...

  • Page 66: On/Off Humidistat Signal

    If an external full tank blowdown signal is used, connect the 24 VAC input signal to pins "1" and "8" in Figure the low voltage terminal strip. Refer to 24 VAC 24 VAC Security Loop CH 1 CH 2 +10 VDC FTBD Figure 30: Full Tank Blowdown Signal Connection 2583703_EN_1608 Nortec GS Installation...

  • Page 67: Remote Fault Pcb Connections

    5.11.3.5 Remote Fault PCB Connections The remote fault PCB (printed circuit board) in the Nortec GS humidifier has the following four dry relay contacts for remote display of humidifier status and fault conditions. Refer to Figure 31 for the relevant terminal contacts.

  • Page 68: Single-Phase Power Supply Connection

    5.11.3.6 Single-Phase Power Supply Connection Figure 32. Refer to the Connect the single-phase power supply to the Nortec GS humidifier as shown in specification label (Figure 3 on page 10) for power requirement and sizing of fused disconnect switch. IMPORTANT! Make sure that the main power cable is proper grounded through the ground lug inside the control cabinet.

  • Page 69: Modbus Connection

    RS485 interface (J6). If the jumper is not installed, no communication will take place through J6. 2. Install the jumper JP4 on the control board if the Nortec GS humidifier is the first or last unit in the network.

  • Page 70: Connecting Multiple Units Using Linkup

    5.11.4 Connecting Multiple Units Using Linkup The integrated control board in the Nortec GS humidifier allows up to four integrated controllers to con- nect in a "main-extension" configuration using Nortec's Linkup system. All the humidifiers within this setup must share the same environment, and be controlled by one set of control signals connected to the main unit.

  • Page 71: Electrical Connections Checklist

    … All cables fastened securely? … All cables free of tension and pass through cable glands or grommets? … Electrical installation meet the applicable national and local codes? … All access panels closed and fastened securely? 2583703_EN_1608 Nortec GS Installation...
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  • Page 73: Product Specifications

    Product Specifications Weights For the weights of the Nortec GS humidifier models refer to Table 11 on page Dimensions Steam Outlet ø 1-3/4 in (45 mm) Exhaust Outlet* ø 60 mm - GS 50-CS/NX ø 80 mm - GS 100-CS/NX Air Inlet ø...
  • Page 74 23.7 (603) 18.7 (474) 8.6 (219) Air Inlet ø 3 in (75 mm) Exhaust Outlet* Steam Outlet ø 80 mm - GS 150-CS/NX ø 3 in (75 mm) 27.0 27.7 (684) (705) (42) Gas Inlet 3/4 in NPT Water Inlet**...
  • Page 75 33.0 (839) 24.1 (612) (218) Air Inlet ø 4 in (100 mm) Exhaust Outlet* ø 100 mm - GS 200/300-CS/NX Steam Outlet ø 3 in (75 mm) 27.7 37.8 (705) (960) (42) Gas Inlet 1 in NPT Water Inlet** 3/4 in BSPP...
  • Page 76 50.8 (1290) 32.7 (830) 32.3 (821) Air Inlet Exhaust Outlet* ø 6 in Steam Outlet ø 150 mm - GS 450-CS/NX (150 mm) ø 4 in (100 mm) 62.2 27.7 (1580) (705) (42) Gas Inlet*** 1 in NPT Water Inlet**...
  • Page 77 (830) 32.3 (821) Air Inlet Steam Outlet Exhaust Outlet* ø 6 in ø ø 4 in (100 mm) 150 mm - GS 600-CS/NX (150 mm) 73.2 27.7 (1859) (705) (42) Gas Inlet*** 1 in NPT Water Inlet** 3/4 in BSPP...
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  • Page 79: Appendix

    … Steam line does not reduce in diameter except at the steam distributor; and condensate line installed just before the restriction? … Steam lines do not merge except at the steam distributor through a Nortec adaptor? … Steam line does not sag? …...
  • Page 80 … All relevant national and local regulations for sealed combustion installation satisfied? … Intake vent length does not exceed an equivalent length of 100 ft (30 m)? If unit is a Nortec GS 50 using propane gas, is it limited to 50 ft (15 m)? Maximum six bends? …...
  • Page 81 … All cables fastened securely? … All cables free of tension and pass through cable glands or grommets? … Electrical installation meet the applicable national and local codes? … All access panels closed and fastened securely? 2583703_EN_1608 Nortec GS Appendix-A...
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  • Page 83 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 84 Consulting, Sales and Service: U.S.A. 835 Commerce Park Ave 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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