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Troubleshooting
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Summary of Contents for Nortec RH
- Page 1 Important: Read and save these instructions. This guide to be left with equipment owner. Installation and Operation Manual Includes installation, operation maintenance and troubleshooting information for your RH Electric Steam humidifier 2548006-A| 8 OCT 2009...
- Page 2 WALTER MEIER LTD., except to the extent required for installation or maintenance of recipient’s equipment. All references to the Nortec name should be taken as referring to WALTER MEIER LTD. Liability Notice 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.
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Page 3: Table Of Contents
56 Warranty Returns Electrical External Controls Options and Accessories 21 Start Up Installation Check RH User Interface Start Up Procedure Start Up Checklists 29 Operation LED Status Lights Selecting an RH Setpoint Humidifier Components How the Humidifier Works Humidifier Configuration... -
Page 4: Introduction
• Do not mount on vibrating surface. • Do not mount on floor. • The RH produces steam at atmospheric pressure no devices which could block steam output should be connected to the steam outlet. • Steam lines must be installed so that no restriction can produce backpressure in the humidifier. -
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 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 RH humidifier. Refer to the installation instructions that came with the accessories for their proper installation and operation.
- Page 7 Introduction | 4...
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Page 8: Options And Accessories
Installation 6 Typical RH Installation 7 Location 8 Mounting with Keyholes 9 Plumbing 10 Steam Lines and Condensate Returns 14 Electrical 15 External Controls Control Location Control Wiring On/Off Control Wiring Modulating Control Wiring Optional Outdoor Temperature Reset 20 Options and Accessories... - Page 9 Typical RH Installation Figure 3: Typical Humidifier Installation Installation | 6...
- Page 10 • When possible, mount the RH humidifier at a height convenient for servicing. Note: Do not mount on hot surfaces, where freezing can occur, vibrating surface, or floor.
- Page 11 Mounting with Keyholes 1 The RH humidifier is wall mounted using a keyhole located on the back of the unit’s 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 it so it will not lift off the keyhole.
- Page 12 Always install a water shut-off valve. 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 Note: • Drain water is very hot, do not drain to public sink.
- Page 13 NOTE: 1 Use one inch copper steam line for longer runs. 2 The use of steam line other then copper, stainless steel tube or Nortec supplied steam line will void the warranty and may adversely effect the operation of the humidifier...
- Page 14 3/4 in. (19 mm) max. wall thickness Mount distributor to side or bottom of duct Figure 8: RH Distributor Installation Figure 10: Steam Distributor Above Humidifier (Hose) Figure 11: Steam Distributor Below Humidifier (Hose) 4 ft (1.2 m) min. to any obstruction 2 x duct height min.
- Page 15 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 10: Steam Distributor Above Humidifier (Hose) Support Brackets Min 12 in.
- Page 16 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 17 Electrical Caution: Wiring to be performed by a licensed Electrician. Figure 14: Primary Power Connection Installation | 14...
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Page 18: Control Wiring
For wiring use minimum 18 AWG and keep as short as possible. The RH humidifier can be operated with either On/Off controls only or with On/Off controls and one modulating input. The modulating input can be from a duct high limit or humidity control humidistat. -
Page 19: On/Off Control Wiring
On/Off Control Wiring Figure 16: On/Off Controls Figure 17: Digital On/Off Humidistat Installation | 16... -
Page 20: Modulating Control Wiring
Modulating Control Wiring Figure 18: Modulating Controls 17 | Installation... - Page 21 Figure 19: Modulating Control Wiring Figure 20: Duct Sensor Wiring Installation | 18...
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Page 22: Optional Outdoor Temperature Reset
Optional Outdoor Temperature Reset Figure 21: Outdoor Temperature Reset • 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 23: Options And Accessories
Options and Accessories Remote Blower Pack A remote blower pack is available for the RH for applications where steam for humidification must be introduced directly into the space being humidified but the humidifier must be installed in a different location. -
Page 24: Start Up
Start Up 22 Installation Check 23 RH User Interface 23 On/Off or Modulating Operation 24 Start Up Procedure 25 Nortec Digital Controls Modulating Control On/Off Control 26 RH Pre-Start Up Checklist 21 | Start Up... - Page 25 Installation Check Before turning on power to the RH inspect the installation to insure that it was carried out correctly. Refer to, to RH Pre-Start Up Checklist on page 26, and to the chapter on installation. 10 ft (3 m) min.
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Page 26: On/Off Or Modulating Operation
On/Off or Modulating Operation From the factory the RH 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 27 8 It can take 5 – 10 minutes for the water to be heated up by the submerged electrodes and for steam to be produced. Note: If operated on low conductivity water it may take several hours for the RH to reach full output capacity. This is normal. During this time the humidifier will not perform any drains and the conductivity of the water in the cylinder will increase.
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Page 28: Nortec Digital Controls
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 starting on page 45. -
Page 29: Start Up Checklists
RH 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: (Clearances around the unit Acceptable Obstruction) •... - Page 30 RH 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? 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 31 Start Up | 28...
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Page 32: Operation
Operation 30 LED Status Lights 30 Selecting an RH Setpoint 31 Humidifier Components 32 Description of Components 33 Humidifier Schematic 34 How the Humidifier Works Steam Generation Drains Steam Distribution Steam Line Condensate Return 36 Humidifier Configuration 29 | Operation... - Page 33 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 34 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 27: RH Humidifier Components 31 | Operation...
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Page 35: Description Of Components
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 36: Humidifier Schematic
Humidifier Schematic Figure 28: Humidifier Schematic 33 | Operation... -
Page 37: Steam Generation
The unit continues to fill until the current matches demand or the high water sensor detects a high water level. • The RH repeats the fill and boil down cycle repeatedly to match output to demand. • Over time minerals in the water will adhere to the cylinder’s electrodes. The humidifier will automatically fill to a higher water level to maintain full capacity during the life of the cylinder. -
Page 38: Steam Line
(or room if blower pack is used). Condensate can be returned to the RH fill cup to reduce water waste or can be fed to drain. - Page 39 If required several settings can be made using jumpers on the RH’s control board. The output of the RH can also be reduced by using a potentiometer on the RH’s control board. See Figure 30: RH Control Board Jumpers for location of jumpers and the capacity adjustment potentiometer.
- Page 40 Modulation Offset (J13) The RH controller can be configured to work with a modulating humidistat with 4-20 mA or 2-10 VDC output. Modulation offset can be configured with jumper 13. (Factory setting = Jumper Removed, 0-10 VDC or 0-20 mA control signal) J13 Removed –...
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Page 41: Maintenance And Servicing
Maintenance and Servicing 39 Required Maintenance Cylinder Spent Fault Replacement Cylinder Removing the Cylinder Drain Valve Cleaning Installing the New Cylinder 43 Extended Shutdown Starting After Extended Shutdown 44 RH Maintenance Checklist Maintenance and Servicing | 38... -
Page 42: Cylinder Spent Fault
Cylinder Spent Fault When the cylinder is spent the RH will stop operating and the yellow LED will flash in a repeating pattern of 4 flashes. See Table 8: Troubleshooting RH Faults on page 49 for more information on other flash sequences. -
Page 43: Removing The Cylinder
Removing the Cylinder Warning • Disconnect main power at the external disconnect before any servicing. • The inside of the humidifier’s 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 44: 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 45: Installing The New Cylinder
Plunger Spring (Note Orientation) Sleeve Solenoid Figure 35: 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 46: Starting After Extended Shutdown
4 Shut off power to the humidifier with the external disconnect. 5 Close the supply water shut-off valve. Note: As long as the RH is powered, it will automatically drain the cylinder when there has not been a call for humidity for an extended period of time. This feature will reduce or prevent the possibility of corrosion of the electrodes and the accumulation of algae and bacteria growing in the cylinder. - Page 47 RH 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 •...
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Page 48: Troubleshooting
Troubleshooting 46 Organization of Troubleshooting Chapter 46 Troubleshooting Requirements 47 General Troubleshooting Humidifier Steam Distributors Blower Pack Digital Humidistat 49 RH Faults LED Flash Sequence Clearing a Fault 51 RH Wiring Diagram 45 | Troubleshooting... -
Page 49: Organization Of Troubleshooting Chapter
• Wiring diagram for specific for your humidifier is installed on the inside of the humidifier door. A generic copy of the RH 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 50 The following section provides general guidelines for troubleshooting the RH humidifier and auxiliary components. For detailed troubleshooting information refer to the manuals that were provided with the auxiliary equipment and to Table 8: Troubleshooting RH Faults after in this chapter.
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Page 51: Steam Distributors
Steam Distributors Symptom Cause Corrective Action(s) Distributor spitting out water 1 Distributor not level 1 Use support at end o 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 52 The self-diagnostic system built into the RH is continually monitoring the operation of the humidifier. When an abnormal condition occurs that cannot be self corrected by the software the RH will turn off power to the cylinder, drain the cylinder, and annunciate the fault using the yellow status LED.
- Page 53 Table 8: Troubleshooting RH 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...
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Page 54: Rh Wiring Diagram
120 P 240 VAC voltage. Note: Room Steam Distributor not included with RH Duct humidifier Rh Humidifier 120/208/240 Vac INTERNAL WIRING DIAGRAM DIAGRAM No. 2548760 REV. B DATE: Sept. 9, 2009 Figure 36: RH Wiring Diagram 51 | Troubleshooting... -
Page 55: Spare Parts| 52
Exploded View and Spare Parts List Spare Parts| 52... - Page 56 RH Spare Parts Figure 37: RH Spare parts 53 | Spare Parts...
- Page 57 Table 9: RH Spare Parts List Item Nortec Part No. Description Reference Housing, Plastic Back, RH 2547403 Housing, Plastic front cover, RH Reference Cabinet, Electrical Backplate, RH 2548001 Cabinet, Drain Pan, RH 2548000 Coverplate, Electrical, RH 2548313 Cover, bottom, RH...
- Page 58 55 | Warranty...
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Page 59: Warranty
Warranty Walter Meier Inc. and/or Walter Meier 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 60 U.S.A. Walter Meier (Climate USA) Inc. 826 Proctor Avenue Ogdensburg, NY 13669 CANADA Walter Meier (Climate Canada) Ltd. 2740 Fenton Road Ottawa, Ontario K1T 3T7 TEL: 1.866.NORTEC1 FAX: 613.822.7964 EMAIL: northamerica.climate@waltermeier.com WEBSITE: www.humidity.com Certificate No. 002419...
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