Nortec RH2+ Installation And Operation Manual
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Nortec RH2+ Installation And Operation Manual

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Important: Read and save these instructions. This guide to be left with equipment owner.
RH2+
Installation and
Operation Manual
Includes installation, operation
maintenance and troubleshooting
information for your RH2+ Electric
Steam humidifier
2568051-F| 28 OCT 2014

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  • Page 1 Important: Read and save these instructions. This guide to be left with equipment owner. RH2+ Installation and Operation Manual Includes installation, operation maintenance and troubleshooting information for your RH2+ Electric Steam humidifier 2568051-F| 28 OCT 2014...
  • Page 2 CYLINDER # 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

    External Controls 58 Warranty Options and Accessories 23 Start Up Installation Check On/Off or Modulating Operation Start Up Procedure Nortec Digital Controls RH2 Pre-Start Up Checklist 31 Operation LED Status Lights Selecting a Relative Humidity Setpoint Humidifier Components Description of Components...

  • Page 4: Introduction

     Nortec does not accept any liability for installations of humidity equipment installed by unqualified personnel or the use of parts/components/equipment that are not authorized or approved by Nortec.

  • 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: Rh2 Models

    The RH2 is the most advanced residential steam humidifier available and provides steady and reliable humidification for a home using the same proven cylinder technology as Nortec’s industrial electrode platform. The RH2 is available in 2 models: Duct, and Space. The duct model is designed for connection to a steam distributor installed in a supply air duct, or for connection to a remote blower pack.
  • Page 7 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 RH2 humidifier. Refer to the installation instructions that came with the accessories for proper installation and operation.

  • Page 8: Options And Accessories

    17 External Controls Control Wiring Duct Humidification Control Location Space Humidification Control Location On/Off Control Wiring Modulating Control Wiring Fan Enable Wiring RH2 Fan Control Nortec On/Off Humidistat Fan Control 22 Options and Accessories Remote Blower Pack 5 | Installation...
  • Page 9 Typical RH2 Installation Figure 3: Typical Humidifier Installation Installation | 6...
  • Page 10 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.
  • Page 11 Mounting with Keyholes 1 The RH2 humidifier is wall mounted using a keyhole located on the back of the unit cabinetry. 2 Use #8 x 2 in. (5 cm) screws mounted into 2x4 studs or better. 2 screws are needed, one for hanging the unit and one for securing so it will not lift off the keyhole.
  • Page 12 Use 1/2 in. OD copper to within 4 ft (1.2 m) of humidifier *Pipe and water shut-off valve not supplied by Nortec. Figure 6: Water Supply and Drain Connection  All water supply and drain line connections should be installed in accordance with local plumbing codes.
  • Page 13 The RH2 Duct requires a steam distributor, installed in the ventilation duct. The RH2 Duct can distribute steam into a ventilation duct using the following distributor options in Table 3. Table 3: RH2 Duct Steam Distributor Options Nortec Part Option Description Notes Number...
  • Page 14 Figure 7: RH2 Duct Nozzle Distributor Installation Figure 8: RH2 Duct RSD10 Distributor Installation 11 | Installation...

  • Page 15: Steam Lines And Condensate Return Instructions

    240V Note: * The use of steam line other than copper, stainless steel tube or Nortec supplied steam line will void the warranty and may adversely affect the operation of the humidifier. ** These diameters require a reducer at humidifier and steam distributor connection. Use Nortec part number 1115444 at humidifier to prevent backpressure caused by condensation collecting at the reduction.
  • Page 16 MAIN RULES FOR ATMOSPHERIC STEAM LINES  Steam lines must not have any restrictions which could result in back pressure.  Follow recommended materials, size and length, see tables.  Slope the steam lines.  Insulate with 1.0 in. (2.5 cm) pipe insulation ...
  • Page 17 1 ft (30 cm) 2 in. (5 cm) min. 12 in.(30 cm) min. Radius Condensate line Support Brackets 1 ft (30 cm) min. before Condensate any bend Trap Connect Steam Connect Condensate Hose to Cylinder Hose to Fill Cup Figure 11: Steam Distributor Above Humidifier (Hose) Support Brackets Min 12 in.
  • Page 18 12 in. (30 cm) Support brackets min. radius Hose will soften over time proper support Is necessary 1ft (30 cm) min. before any bend Obstruction 2 in. (5 cm) 1 ft (30 cm) min. 1 ft (30 cm) min. Use full size condensate tee at low point.

  • Page 19: Electrical

    Electrical Caution: Wiring to be performed by a licensed Electrician. Figure 15: Primary Power Connection Installation | 16...

  • Page 20: External Controls

    External Controls Control Wiring Controls are available from Nortec as accessories. If controls were not ordered with humidifier, they must be purchased or supplied by others. The following information is relevant to all controls, factory supplied or otherwise. For wiring use minimum 18 AWG and keep as short as possible.

  • Page 21: Space Humidification Control Location

    Note: Regardless of selecting on/off or modulating control method, Nortec humidifiers must have a closed circuit across its 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 22: On/Off Control Wiring

    On/Off Control Wiring Figure 18: On/Off Controls Figure 19: Digital On/Off Humidistat 19 | Installation...

  • Page 23: Modulating Control Wiring

    Modulating Control Wiring Figure 20: Modulating Controls Figure 21: Modulating Control Wiring Installation | 20...

  • Page 24: Fan Enable Wiring

    When distributing steam into a duct, there can be a call for humidity when there is no air flow. Either the RH2 or the Nortec On/Off digital humidistat can be used to enable a fan on a call for humidity. Wiring below is for a typical furnace installation. Consult the air handler’s installation manual for exact wiring instructions on how to enable the fan.

  • Page 25: Options And Accessories

    Options and Accessories Remote Blower Pack A remote blower pack is available for the RH2 Duct for applications where steam for humidification must be introduced directly into the conditioned environment but the humidifier must be installed in a different location. ...

  • Page 26: Start Up

    Start Up 24 Installation Check 25 On/Off or Modulating Operation 26 Start Up Procedure 27 Nortec Digital Controls Modulating Control On/Off Control 28 RH2 Pre-Start Up Checklist 23 | Start Up...
  • Page 27 Installation Check Before turning on power to the RH2 inspect the installation to ensure that it was carried out correctly. Refer to RH2 Pre-Start Up Checklist on page 28, and to the Installation chapter. Figure 25: Installation Check Start Up | 24...
  • Page 28 Caution: Do not leave the On/Off/Drain switch in the drain position for extended periods of time. The drain valve solenoid may heat up and result in damage to the valve and its wiring. On/Off or Modulating Operation From the factory the RH2 is configured to operate as an On/Off humidifier. It will run when 24 VAC from terminal 1 is fed back into terminal 2 through an On/Off humidistat and other security devices in series.
  • Page 29 Start Up Procedure 1 Examine the humidifier and installation for damage and/or improper installation. 2 Ensure the cylinder is properly seated in the drain valve and that the electrode plugs are pushed all the way down on the cylinder pins. 3 Ensure that the front cover is in place and secured with its retaining screws.
  • Page 30 On/Off loop. Adjust the setpoint to the desired setting by using the up/down arrow buttons on the controller. Note: It is possible to field calibrate Nortec digital controls if the displayed humidity is found to be different than a known trusted source. See chapter on Troubleshooting.
  • Page 31 RH2 Pre-Start Up Checklist Unit Serial #: _________________ No. of humidifiers: _______ Tag: _______________ Unit type: _______ __________ Voltage: ________V/_____ph Cylinder type: Customer/Job: Address: WATER QUALITY: Well water  City water  Softened water  HUMIDIFIER MOUNTING:  Level • Front Clearance 36 in.  STEAM LINE(S): ...
  • Page 32 RH2 Start Up Checklist Unit Serial #: _________________ No. of humidifiers: _______ Tag: _______________ Unit type: _______ __________ Voltage: ________V/______ph Cylinder Type: Customer/Job: Address: PRELIMINARY:  Pre-start-up checklist completed? yes  no  If no, perform Pre-Start-up Checklist before starting humidifier. START-UP PROCEDURE: The prerequisites for the humidifier filling and contactor pulling in to make steam are as follows: ...
  • Page 33 Start Up | 30...

  • Page 34: Operation

    Operation 32 LED Status Lights 32 Selecting a Relative Humidity Setpoint 33 Humidifier Components 34 Description of Components 35 Humidifier Schematic 36 How the Humidifier Works Steam Generation Drains Steam Distribution Steam Line Condensate Return 38 Humidifier Configuration 31 | Operation...
  • Page 35 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 36 Humidifier Components High Water Sensor Steam Outlet Plug Condensate Return Blowerpack Fill Cup Cylinder Plug High Voltage Terminal Block Cylinder Transformer Power Relay Control Board Fill Valve Control Terminal Strip On/Off/Drain Switch Drain Canal Drain Valve Figure 28: RH2 Humidifier Components 33 | Operation...
  • Page 37 Description of Components Table 5: Humidifier Components Component Function of Component Disperses steam generated by the humidifier directly into a space being Blowerpack humidified. Consists of a steam distributor, fan, power supply, and mounting bracket. Provides a connection to return condensate to humidifier. Condensate Return Terminal strip for connecting external controls to humidifier and Control Terminal...
  • Page 38 Humidifier Schematic Figure 29: Humidifier Schematic 35 | Operation...

  • Page 39: Steam Distribution

    How the Humidifier Works The RH2 is an atmospheric steam generator that uses heat generated by electrical current flowing between submerged electrodes to generate steam. The RH2 is designed for air humidification via steam distributor or blower pack. Steam Generation ...

  • Page 40: Steam Line

    Steam Line The steam line between the cylinder steam outlet and the distributor serves two purposes: it is used as a conduit to transfer the atmospheric steam from the humidifier to the distributor, as well as providing a means to remove condensate. See steam distributor on page 10 for information on selecting steam lines.

  • Page 41: Capacity Adjustment

    RH2’s control board. See Figure 31: RH2 Control Board Jumpers for location of jumpers and the capacity adjustment potentiometer. Note: Nortec recommends not making any configuration changes unless they are required and that any changes to the RH2 settings be performed by a qualified technician.
  • Page 42 On/Off or Modulating Control (J10) The RH2 output can be controlled by either an On/Off or a modulating humidistat. To set the RH2 to operate with a modulating humidistat, remove Jumper J10. (Factory setting = jumper Installed , On/Off operation) J10 Removed–...

  • Page 43: Maintenance And Servicing

    Maintenance and Servicing Required Maintenance Cylinder Spent Fault Replacement Cylinder Removing the Cylinder Drain Valve Cleaning Installing the New Cylinder Extended Shutdown Starting After Extended Shutdown RH2 Maintenance Checklist Operation| 40...

  • Page 44: Cylinder Spent Fault

    Caution: Failure to replace the cylinder at the end of cylinder life will result in improper operation and may result in damage to the humidifier. Nortec is not responsible for any damages resulting from, or attributed to, the failure to replace a spent cylinder (see Manufacturer’s Warranty).

  • Page 45: Removing The Cylinder

    Removing the Cylinder Warning  Disconnect main power at the external disconnect before any servicing.  The inside of the humidifier cabinet contains high voltage components and wiring. Access should be limited to authorized personnel. 1 Drain the existing cylinder by switching the On/Off/Drain switch to the Drain position. Let the humidifier drain until no more water is flowing out to drain (usually not more than 10 minutes).

  • Page 46: Drain Valve Cleaning

    Drain Valve Cleaning Always clean the drain valve before installing a new cylinder. Scale from the spent cylinder may have fallen into the drain valve and could prevent its proper operation. To properly clean the drain valve it must be removed and disassembled. Note: Be sure to reattach the green ground wire to reduce the risk of electrical shock.

  • Page 47: Installing The New Cylinder

    Plunger Spring (Note Orientation) Sleeve Solenoid Figure 36: Drain Valve Actuator Assembly Installing the New Cylinder CAUTION: Make sure the new cylinder is the same model as the one that was removed. Model number is on top left corner of cylinder label. 1 Insert cylinder into drain valve.

  • Page 48: Starting After Extended Shutdown

    Extended Shutdown Should it be required to disconnect power to the humidifier for a period of extended shut-down, always drain the cylinder first. 1 Switch the On/Off/Drain Switch to the Drain position. 2 Wait until the humidifier is completely drained (usually takes less than 10 minutes). 3 Turn the On/Off /Drain switch to the off position.
  • Page 49 RH2 Maintenance Checklist Model #: _________________ Serial #: _________________ Tag: ________ Cylinder #: CHECK CYLINDER   Cylinder spent), yellow LED flashing 4 times in sequence. (If Yellow LED is On and cylinder is not new then cylinder will have to be replaced soon.) REPLACE CYLINDER ...

  • Page 50: Troubleshooting

    Troubleshooting 48 Organization of Troubleshooting Chapter Troubleshooting Requirements 49 General Troubleshooting Humidifier Steam Distributors Blower Pack Digital Humidistat 51 RH2 Faults LED Flash Sequence Clearing a Fault 53 RH2 Wiring Diagram 54 Exploded View and Spare Parts List 58 Warranty 47 | Troubleshooting...

  • Page 51: Organization Of Troubleshooting Chapter

    A generic copy of the RH2 wiring diagram is also included at the end of this chapter for reference purposes.  When contacting your local representative or Nortec for troubleshooting assistance, please ensure the serial number has been obtained for reference purposes.
  • Page 52 General Troubleshooting The following section provides general guidelines for troubleshooting the RH2 humidifier and auxiliary components. For detailed troubleshooting information refer to the manuals that were provided with the auxiliary equipment and to Table 8: Troubleshooting RH2 Faults after in this chapter.

  • Page 53: Steam Distributors

    Steam Distributors Symptom Cause Corrective Action(s) Distributor spitting out water 1 Distributor not level 1 Use support at end of distributor to ensure it is level. 2 “P” Trap too close to distributor 2 “P” Trap must be a minimum of 12 in (30 cm) below the distributor to ensure flow.

  • Page 54: Led Flash Sequence

    4 Check for correct fill valve in 4 Filling too fast, wrong fill valve parts list, replace if incorrect 5 Water supply too conductive 5a Contact Nortec representative for recommendation on alternate cylinder 5b Change the water supply...
  • Page 55 Table 8: Troubleshooting RH2 Faults (Continued) Yellow LED System Detected Cause Corrective Action(s) 1 Drain valve leaking or stuck 1 Clean drain valve or replace open (see maintenance chapter) 2 Water shut off valve closed 2 Open shut off valve 3 Fill Valve strainer blocked 3 Clean out strainer on fill valve inlet.
  • Page 56 RH2 Wiring Diagram 53 | Troubleshooting...

  • Page 57: Spare Parts| 54

    Exploded View and Spare Parts List RH2+ Spare Parts The Nortec residential humidifier model should be confirmed. The following spares parts are for RH2+ models only: Nortec Part No. Description 2560953 RH2+ Duct, 10lbs/hr, 120/208/240V 1P 2560952 RH2+ Space, 8lbs/hr, 120/208/240V 1P Spare parts RH and RH2 models can be found in RH2 manual 2549509.
  • Page 58 RH2+ Spare Parts The following spares parts are for RH2+ models only: tNortec Part No. Description 2560953 RH2+ Duct, 10lbs/hr, 120/208/240V 1P 2560952 RH2+ Space, 8lbs/hr, 120/208/240V 1P Figure 37: RH2 Spare parts 55 | Spare Parts...
  • Page 59 Part No. Description 2560953 RH2+ Duct, 10lbs/hr, 120/208/240V 1P 2560952 RH2+ Space, 8lbs/hr, 120/208/240V 1P Table 9: RH2 Spare Parts List Item Nortec Part No. Description RH2 DUCT Back Cover Reference RH2 SPACE Back Cover 2560780 RH2 DUCT Front Cover 2547403...
  • Page 60 57 | Spare Parts...

  • Page 61: 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 62 U.S.A. 1860 Renaissance Blvd Sturtevant, WI 53177 826 Proctor Avenue Ogdensburg, NY 13669 CANADA 2740 Fenton Road Ottawa, Ontario K1T 3T7 TEL: 1.866.NORTEC1 EMAIL: nortec@humidity.com WEBSITE: www.humidity.com...

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