Nortec NHRS 135-180 Installation And Operation Manual
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Nortec NHRS 135-180 Installation And Operation Manual

Nh series resistive element steam humidifier
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Important: Read and save these instructions. This guide to be left with equipment.
NH
Series
Installation and
Operation Manual
Includes installation, operation
maintenance and troubleshooting
information for your NHRS Resistive
Element Steam Humidifier
2530618-J | 10 NOV 2014

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  • Page 1 Important: Read and save these instructions. This guide to be left with equipment. Series Installation and Operation Manual Includes installation, operation maintenance and troubleshooting information for your NHRS Resistive Element Steam Humidifier 2530618-J | 10 NOV 2014...
  • Page 2 SERIAL # Proprietary Notice This document and the information disclosed herein are proprietary data of Nortec Humidity Ltd. Neither this document nor the information contained herein shall be reproduced, used, or disclosed to others without the written authorization of Nortec Humidity Ltd., except to the extent required for installation or maintenance of recipient’s equipment.

  • Page 3: Table Of Contents

    Contents Introduction Start Up Procedure Information Screens Receiving and Unpacking How the Humidifier Works Humidifier Components Selecting an RH Setpoint Description of Components Maintenance and NHRS Models Servicing Installation Troubleshooting Typical Humidifier Installation General Troubleshooting Location Wiring Diagrams Mounting with Keyholes Start Up Checklists Plumbing Maintenance Checklists...

  • Page 4: Introduction

     Regardless of selecting On/Off or modulating control method, NORTEC humidifiers must have a closed circuit across the On/Off security loop control terminal to operate. NORTEC highly recommends the use of a high limit humidistat and an air proving switch in series for this function.

  • Page 5: Receiving And Unpacking

    Receiving and Unpacking 1 Check packing slip to ensure ALL material has been delivered. 2 All material shortages are to be reported to NORTEC within 48 hours from receipt of goods. NORTEC assumes no responsibility for any material shortages beyond this period.

  • Page 6: Humidifier Components

    Humidifier Components Figure 2: NHRS Humidifier Components 3 | Introduction...

  • Page 7: Description Of Components

    Description of Components Table 1: Humidifier Components Component Function of Component Auxiliary Drain Drains water from boiling tank by activating drain pump. Note that initiating a Switch drain in this manner will not induct Drain Water Cooling. Holds resistive elements submerged in water. Current traveling along the Boiling Tank internal element wire generates heat which is used to generate steam.

  • Page 8: Nhrs Models

    NHRS Models The NHRS is Nortec’s flagship resistive element electric humidifier. Since it can accept a variety of supply water types (potable, Reverse Osmosis, De-Ionized), it is very robust and useful in a wide set of applications. The NHRS is available in capacities ranging from 10 lb/hr (4.5 kg/hr) to 180 lb/hr (81.6 kg/hr).
  • Page 9 NHRS Outdoor model to ensure proper installation (P/N 2531550). Options and Accessories Nortec provides a complete line of options and accessories for every humidification application. The following options and accessories are available and may have been delivered with your NHRS humidifier.
  • Page 10 Table 3: NHRS Specifications Fill Net/Full Capacity NHRS Part Phase Volts Amps Weight lb lb/hr (kg/hr) Fuse (l/min) (kg) 10 (4.5) 2530540 18.4 3.83 10 (4.5) 220-240 2530541 15.9 3.83 10 (4.5) 440-480 2530542 3.83 10 (4.5) 550-600 2530543 3.83 15 (6.8) 2530544 24.5...

  • Page 11: Installation

    Remote Fault Option Blower Pack Clearance Wiring Requirements Mounting with Keyholes Options and Accessories Plumbing Keep Warm (Outdoor Standard) Nortec Online/LINKS2 Steam Distributor Remote Relay Board Steam Lines and Scale Management System Condensate Return Solid State Relays Electrical External Controls...
  • Page 12 Typical Humidifier Installation Mounting Page 10 Steam Distribution Page 14 Figure 4: Typical Humidifier Installation Plumbing Controls Electrical Page 13 Page 21 Page 20 9 | Installation...
  • Page 13  Clearance dimensions shown are for reference only and are the minimum required for maintenance of the humidifier. Consult local and national codes before final location and installation. Nortec does not accept responsibility for installation code violations.  Install only in areas with ambient temperatures between 41 and 104ºF (5 and 40ºC), and relative humidity between 5 and 95% (non-condensing).
  • Page 14 Blower Pack Clearance Requirements For more information regarding the clearance requirements of the Remote Mounted Blower Pack (P/N 2572615), refer to installation manual (document number 2572641). Table 4: Clearances for Blower Packs on Low Speed* Humidifier Min. Frontal Min. Overhead Min.
  • Page 15 Mounting with Keyholes 1. The NHRS Series humidifier is wall mounted using keyholes located on the back of the unit cabinetry. 2. Use #12 x 3” (7.5 cm) screws mounted into 2x4” studs or better. Two screws are required for units with one tank (NHRS 10 to NHRS 90 lb/hr). Three screws are required for units with two tanks (NHRS 135 and 180 lb/hr).
  • Page 16 Plumbing Figure 7: Water Supply and Drain Connection Note: • Drain water is very hot, do not drain to public sink. • Use material suitable for 212ºF (100ºC) for drain and condensate lines.  All water supply and drain line connections should be installed in accordance with local plumbing codes.
  • Page 17 Remote Blower Pack (P/N 2572615), or into an air handling system using either Nortec steam distributors or Nortec’s SAM-e steam distribution manifold.  The steam distributor should be installed as close as possible to the humidifier. Short steam distribution lines minimize condensate losses and the possibility of generating back pressure in the steam distribution line.
  • Page 18 1) This chart gives the maximum length of recommended steam line by unit size. 2) The use of steam line other than copper, stainless steel, or Nortec steam hose will void the warranty and may cause adverse effects regarding the operation of the humidifier.
  • Page 19 Table 7: Recommended Materials and Sizes for Steam Runs. Supply Tank Size Steam Run Steam Line Steam Line Water (lbs/hr) ft (m) Material Description Type 1.5” MED-L Tubing 0-30 0-10 (0-3) Copper Tube (1.625” OD) Potable 2.0” MED-L Tubing 0-30 10-30 (3+) Copper Tube (2.125”...
  • Page 20 Use Appropriate Slope Insulate Pipe Minimal Slope (up) 10 Degrees 2 in. (5 cm) 1 ft (30 cm) Minimal Slope (down) 2 Degrees 1 in. (2.5 cm) pipe 0.5 in. 1ft (30 cm) insulation (12 mm) Figure 9: Steam Line Slope and Installation Trap condensate •...
  • Page 21 Figure 11: Typical Steam Line Installation Steam Line Rules The following 10 points provide rules for installing steam lines connecting the NH humidifier to ASD, BSD, CSD, SAMe and remote blower packs. In addition to these rules never use unapproved material for steam lines. 1.
  • Page 22 4. For steam hose, maintain minimum 12” (30 cm) bend radius. 5. Install traps on condensate lines at least 12” (30 cm) below connection. 6. Only combine steam lines at steam distributor with Nortec adapter. 7. Install condensate traps at low points and horizontal to vertical transitions.
  • Page 23 8. Increase diameter either on down slope or install condensate trap. 9. Install condensate traps if steam line > 15 feet (4.5 m). 10. In addition, never: After installation, always  Purge steam lines to remove any contaminants and installation materials. ...
  • Page 24 Electrical Caution: Wiring to be performed by a licensed Electrician. To humidifier high voltage terminal strip Figure 12: Primary Power Connection 21 | Installation...

  • Page 25: Control Wiring

    External Controls Control Wiring The following information is relevant to all controls, factory supplied or otherwise. For wiring use a minimum of 18 AWG and keep as short as possible. The NHRS humidifier can be operated with a modulating input or as On/Off. Caution: Failure to wire the humidifier in accordance with the wiring instructions could cause permanent damage.

  • Page 26: Space Humidification

    Note: Regardless of selecting on/off or modulating control method, Nortec humidifiers must have a closed circuit across its security loop control terminal to operate. Nortec highly recommends the use of a high limit humidistat and an air proving switch in series for this function.

  • Page 27: On/Off Control Wiring

    On/Off Control Wiring Figure 15: On/Off Controls Figure 16: Digital On/Off Humidistat Installation | 24...
  • Page 28 Figure 17: Duct Sensor Wiring 25 | Installation...

  • Page 29: Modulating Control Wiring

    Modulating Control Wiring Figure 18: Modulating Controls Figure 19: Digital Modulating Humidistats Installation | 26...
  • Page 30 Figure 20: Digital Wall Humidistat - Remote Wall Sensor 27 | Installation...

  • Page 31: Transducer Control Wiring

    Transducer Control Wiring Figure 21: Transducers Figure 22: Digital Transducers Installation | 28...
  • Page 32 Optional Outdoor Temperature Setback Sensor Figure 23: Outdoor Temperature Setback  Each digital controller is equipped with an integrated reset function that can reduce the setpoint during cold weather operation. This will prevent condensation on windows and building structures. The above graph illustrates how the setpoint reset feature operates. ...
  • Page 33 Remote Fault Option Wiring The NHRS remote fault option (P/N 1508069) includes four relays that can provide remote status indication. The relays are mounted to a remote fault board which is located as shown in Figure 26. The PCB with the relays includes markings which indicate the function of each terminal on the board.

  • Page 34: Blower Pack

    Options and Accessories Note: For installation of options and accessories follow the instructions that are provided with them. Blower Pack Optional blower pack (part number 2572615) can be used to distribute steam to localized areas, or in areas that do not have built-in air distribution systems. Blower packs are available in remote configuration, are piped in the field, and are wired to the humidifier RMBP power source (or a separate power source if the installation requires).

  • Page 35: Keep Warm (Outdoor Standard)

    Part number 1504561. Nortec Online/LINKS2 Nortec OnLine enables a humidifier to communicate and be monitored through the Internet. Several configurations are available: Dynamic Host Configuration Protocol (DHCP), Dial-up, General Packet Radio Service (GPRS), Slave, and Static IP. Consult factory for details.

  • Page 36: Start Up

    Start Up Installation Check NHRS User Interface Auxiliary Drain Switch Door Interlock Switch Start Up Procedure Initial Start-Up Procedure Information Screens How the Humidifier Works Start Up Automated Operation System Drains Selecting an RH Setpoint 33 | Start Up...

  • Page 37: Installation Check

    Installation Check Before turning on power to the NHRS, inspect the installation to ensure that it was carried out correctly. Refer to figure below, the NHRS Pre-Start Up Checklist, and the preceding chapter on installation. Figure 27: Installation Check Start Up | 34...

  • Page 38: Nhrs User Interface

    NHRS User Interface Figure 28: NHRS User Interface Auxiliary Drain Switch In addition to software controlled draining of the tank , the NHRS has a manual drain switch which can be used to drain the tank even if software is not functioning. To drain the tank, put the switch into the drain position.

  • Page 39: Start Up Procedure

    Start Up Procedure Warning: Damaged units or improperly installed units must not be operated. Damaged or improperly installed units may present a danger to persons and property. 1. Examine the humidifier and installation for damage and/or improper installation. 2. Ensure that the doors are in place and secured with retaining screws. NOTE: if the optional Scale Management System is installed, make sure the valve on the scale reservoir is closed.
  • Page 40 c. Check for correct functioning of the monitoring equipment (external safety network). d. Set the desired humidity value on the humidity controller / humidistat. e. Make sure no leaks are present.  The heating current switches on as soon as the humidity controller / humidistat demands humidity.

  • Page 41: Information Screens

    Information Screens The NHRS has a “display menu” from which various operating parameters can be viewed. It is not possible to change the values on the display level. 1. Display level operation a. Call up the display level with <↑> or <↓>. b.
  • Page 42 d. Working Hours 1. Total of working hours elapsed since initial commissioning of the humidifier. e. Time Remaining to minor/major service 1. Time remaining (in hours) before the next minor/major service.  Time to maintenance can be adjusted to suit water conditions. Value Setting ...
  • Page 43 Figure 31: Drain Cycle adjustment S1 NOTE: Water quality conditions resulting in component failures are not covered under Nortec’s standard warranty. The factory settings are based on the following water conditions when the unit leaves the factory. Should you have water conditions more aggressive that the stated parameters, consult the factory for a new drain cycle setting to help improve your scale management.
  • Page 44 6.5-7.5 Chlorides > 50 ppm > 25 ppm Nortec recommend performing a semi-annual water analysis to ensure optimal performance. g. Stand-by Heating (also known as “Keep Warm”) 1. Stand-by Heating activated (“on”) or deactivated (“off”). NOTE: If stand-by heating is active, the water temperature in the steam tank is constantly kept at approximately 158ºF (70ºC) by the control board.
  • Page 45 k. De-mineral Mode 1. De-mineral Mode activated (“on”), consult factory. Deactivated (“off”), factory default. l. Serial Interface 1. Serial Interface activated (“on”), consult factory. Deactivated (“off”), factory default. m. Full Drain Cycle 1. Full Drain Cycle activated (“on”), consult factory. Deactivated (“off”), factory default.
  • Page 46 o. Control Signal 1. Range of the active analog signal in Volts or milliamps. NOTE: The range of the analog signal may be adjusted using the rotary switch “S3” on the control board. Table 13: Control signal settings with rotary switch "S3" S3 Position Signal No signal selected...
  • Page 47 p. Software Version 1. Displays software version for the steam humidifier. q. Unit Type Start Up | 44...

  • Page 48: How The Humidifier Works

    How the Humidifier Works The NHRS is an isothermal humidifier that produces atmospheric steam at operational pressures of -3 to +6 in. W.C. System operation is based upon regulating the operation of Incoloy immersion resistive heating elements with pulse width modulation via contactor(s) or optional solid state relay(s).

  • Page 49: System Drains

    increases. This allows the humidifier to continuously evaporate without interruption and prevents larger influxes of cold water that may otherwise interrupt system operation by cooling the boiling chamber. System Drains 1. System operation will continue in this state until the timer controlled flushing (determined by the S1 dial selector switch on the processor board) is achieved.

  • Page 50: Selecting An Rh Setpoint

    Duct High Limit – The duct high limit is intended to prevent saturation and wetting in duct work at high load conditions. NORTEC recommends a setting of 85% for the duct high limit. It may be necessary to reduce this setting if the duct work is very cold or in contact with exterior cold surfaces.

  • Page 51: Maintenance And Servicing

    Maintenance and Servicing Minor Maintenance Major Maintenance Maintenance and Servicing | 48...
  • Page 52 Minor Maintenance WARNING: A qualified service person should perform all maintenance on the humidifier and any other equipment provided by Nortec that requires maintenance. NOTE: Instruction and details concerning the maintenance of the Nortec equipment must be observed and adhered to without fail. Only the maintenance documented in this manual must be carried out.
  • Page 53 CAUTION: Be extremely careful when handling the steam cylinder. If it is dropped and damaged, it will likely not seal properly and the entire cylinder will need to be replaced. k. Remove the clamp at the top of the cylinder. l.
  • Page 54 Major Maintenance WARNING: A qualified service person should perform all maintenance on the humidifier and any other equipment provided by Nortec that requires maintenance. NOTE: Instruction and details concerning the maintenance of the Nortec equipment must be observed and adhered to without fail. Only the maintenance documented in this manual must be carried out.

  • Page 55: Troubleshooting

    Troubleshooting General Troubleshooting Wiring Diagrams Start Up Checklists NHRS Electric Steam Humidifier – Mandatory Pre-Start-Up Checklist (p1 of 3) NHRS Electric Steam Humidifier – Mandatory Pre-Start-Up Checklist (p2 of 3) NHRS Electric Steam Humidifier – Mandatory Pre-Start-Up Checklist (p3 of 3) Maintenance Checklists Troubleshooting | 52...

  • Page 56: General Troubleshooting

    General Troubleshooting Most operational malfunctions are not caused by faulty equipment but rather by improper installation, or disregard for planning guidelines. Therefore, a complete fault diagnosis always involves a thorough examination of the entire system. Often, the steam hose connection has not been properly executed or the fault lies with the humidity control system.
  • Page 57 Table 14: Troubleshooting errors and warnings (continued) Malfunction / Indication Cause Remedy Individual heating elements faulty. Replace faulty heating elements. Max. Boil down rate too long Error code: 4A/4B Replace fuses on power board. Main voltage too low or failure of Check main voltage and a phase (L1, L2 or L3).

  • Page 58: Wiring Diagrams

    Wiring Diagrams Figure 34: Wiring Diagram (NHRS 010 to 090) 55 | Troubleshooting...
  • Page 59 Figure 35: Wiring Diagram (NHRS 135 to 180) Troubleshooting | 56...

  • Page 60: Start Up Checklists

    Start Up Checklists NHRS Electric Steam Humidifier – Mandatory Pre-Start-Up Checklist (p1 of 3) Unit Serial #: ____________ # of humidifiers: ____________ Tag:_____________ Unit type: NHRS Voltage: _____V/___ph Steam output: ____lbs./hr Customer/Job:_______________ Address: ____________________________________________________________________ Inspected by: ____________ Date of inspection: ___/___/___ WATER QUALITY: ...
  • Page 61 NHRS Electric Steam Humidifier – Mandatory Pre-Start-Up Checklist (p2 of 3) DRAIN LINES:     Air gap located within 3ft of the unit Slopped to drain Size:______________ WIRING:     No loose wires around the unit or on the PC board? Yes CONTROLS: Location/Wiring/Setting Installed...

  • Page 62: Nhrs Electric Steam Humidifier – Mandatory Pre-Start-Up Checklist (P3 Of)

    NHRS Electric Steam Humidifier – Mandatory Pre-Start-Up Checklist (p3 of 3) Unit Serial #: ____________ # of humidifiers: ____________ Tag:_____________ Unit type: NHRS Voltage: _____V/___ph Steam output: ____lbs./hr Customer/Job:___________ Address: ___________________________________________ Start-up by: _____________ Date of Start-up: ___/___/___ PRELIMINARY:  ...

  • Page 63: Maintenance Checklists

    Maintenance Checklists Unit Serial #: ____________ # of humidifiers: ____________ Tag:_____________ Unit type: NHRS Voltage: _____V/___ph Steam output: ____lbs./hr Customer/Job:___________ Address: ___________________________________________ Maintenance by: _____________ Date of Maintenance: ___/___/___ TYPE OF MAINTENANCE*: Minor maintenance, 2-3 times per year:  Inspect all water and steam installations for possible leakage or damage. ...

  • Page 64: Spare Parts

     Read across the table to the column which corresponds to the number of phases, voltage, and capacity of your unit.  To order parts, or help in identifying the part you need, contact your local Nortec agent. 61 | Spare Parts...

  • Page 65: Nhrs Plumbing Parts

    NHRS Plumbing Parts Figure 36: Exploded view, NHRS plumbing parts Spare Parts| 62...
  • Page 66 Table 16: Exploded view, NHRS plumbing parts 63 | Spare Parts...

  • Page 67: Nhrs Electrical Parts

    NHRS Electrical Parts Figure 37: Exploded view, NHRS electrical parts Spare Parts| 64...
  • Page 68 Table 17: Exploded view, NHRS electrical parts 65 | Spare Parts...

  • Page 69: Warranty

    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 warranted (with the exception of the cylinder), are free from defects in material and workmanship.
  • Page 70 U.S.A. 826 Proctor Avenue Ogdensburg, NY 13669 CANADA 2740 Fenton Road Ottawa, Ontario K1T 3T7 TEL: 1.866.NORTEC1 FAX: 613.822.7964 EMAIL: nortec@humidity.com WEBSITE: www.humidity.com...

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Nhrs 010-090

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