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Nortec MES2 Installation And Operation Manual

Electrode steam humidifier
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Important: Read and save these instructions. This guide to be left with equipment.
MES2
Installation and
Operation Manual
Includes installation, operation
maintenance and troubleshooting
information for the MES2 Electrode
Steam humidifier
2554140-B| 18 OCT 2010

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Summary of Contents for Nortec MES2

  • Page 1 Important: Read and save these instructions. This guide to be left with equipment. MES2 Installation and Operation Manual Includes installation, operation maintenance and troubleshooting information for the MES2 Electrode Steam humidifier 2554140-B| 18 OCT 2010...
  • 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.

  • Page 3: Table Of Contents

    Maintenance Checklist Humidifier Components 39 Troubleshooting Humidifier Schematic General Troubleshooting How the Humidifier Works MES2 Faults 11 Installation Wiring Diagram Typical MES2 Installation 46 Spare Parts Location 50 Warranty Mounting Plumbing Steam Lines and Condensate Returns Primary Voltage Wiring Control Wiring...

  • Page 4: Introduction

     Do not mount in area where freezing can occur  Do not mount on vibrating surface  The MES2 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: Mes2 Models

    (ATT CE PVW) Figure 2: MES2 Models The MES2 is available in 6 capacities ranging from 5 to 30 lb/hr (2.3 to 13.6 kg/hr) for operation on a range of voltages and phases as outlined in Table 1: MES2 Part Numbers and Electrical Data.
  • Page 7 Table 1: MES2 Part Numbers and Electrical Data Capacity Phase Attached Attached Remote Remote Attached Stan Volts Amps Open Closed Open Closed dard Closed Elec. Elec. Elec. Elec. Cylin Fuse Elec. ATT CE (kg) ATT OE ATT CE REM OE REM CE 2550262 2550263 2550264 2550265 2550266 (2.3)
  • Page 8 Note: * Steam Outlet is not centered on MES2 5 & 10 lb/hr (2.3 & 4.5 kg/hr) models. ** Weights given for MES2 with enclosed electronics and optional plumbing enclosure. Full Weight is weight with cylinder full of water. Full weight may exceed this value at end of cylinder life depending on the amount of scale and its composition.

  • Page 9: Options And Accessories

    Options and Accessories An enclosed plumbing option is available for each MES2 cabinet size. The option consists of a fixed cabinet with an easily removable door for servicing. Figure 5 shows the enclosed plumbing option installed on a 10 lb/hr MES2 ATT CE.

  • Page 10: Humidifier Components

    Steam Outlet Condensate Return High Water Sensor Plug Plumbing Fill Cup Enclosure (Optional) Cylinder Plug Cylinder Cylinder Tie Wrap Fill Inlet Drain Pan Plumbing Fill Valve Drain Outlet Door Drain Valve Drain Canal (Optional) Figure 6: MES2 Components 7 | Introduction...
  • Page 11 Controls all functions of the humidifier’s operation and provides input and output connections to humidifier components. Electrical Cover Covers the control board and wiring on MES2 models with closed electrical (CE). Fill Cup Provides an air gap for backflow prevention.

  • Page 12: Humidifier Schematic

    Steam Generation  If the MES2 is configured for On/Off operation then as soon as the safety loop between terminal 1 and 2 is closed the humidifier assumes 100% demand, closes the power relay on the control board, and measures the current flowing through the power wire routed through the control board’s current sensor.

  • Page 13: Steam Distribution

    The unit continues to fill until the current matches demand or the high water sensor detects a high water level.  The MES2 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 14: Installation

    Installation 12 Typical MES2 Installation 13 Location 14 Mounting 15 Plumbing 16 Steam Lines and Condensate Returns 19 Primary Voltage Wiring 20 Control Wiring 21 Modbus Wiring 22 MES2 Installation Checklist 11 | Installation...
  • Page 15 Typical MES2 Installation Power Relay On/Off Drain Control Switch Wiring Pg 20 Fuse 1 ft (30 cm) 2 in. (5 cm) 12 in. (30 cm) min. min. radius* Steam Distribution Support Page 16-18 brackets* 1 ft (30 cm) min. before...
  • Page 16 Mount to structural member or on surface capable of supporting the humidifier’s operating weight (see Figure 4: MES2 Dimensions and Weights). The humidifier may be set on its base but clearance must be provided for the drain line to be sloped adequately. In general clearance is not required around the humidifier except for maintenance access and electrical and plumbing connections.
  • Page 17 Mounting 1 The MES2 humidifier can be wall or floor mounted. No mounting holes are provided but can be made anywhere in the base and sides of the cabinet at installation time. 2 Use a minimum of 2 x #8 screws mounted securely into structural surfaces.
  • Page 18 Ensure adequate slope to handle flow. humidifier *Elbows, pipe, water shut-off valve, and air gap reducer not supplied by Nortec. Figure 11: Water Supply and Drain Connection  All water supply and drain line connections should be installed in accordance with local plumbing codes.
  • Page 19 NOTE: 1 Contact Nortec for information on possible losses of other steam line diameters used 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 affect the operation of the humidifier...
  • Page 20 12 in. (30 cm) min drop to top of ‘P’ Trap ‘P’ Traps Use: - NORTEC 0.375 in condensate hose P Trap min - 1/4 in Med-L copper tubing, or 6 in. (15 cm) - 0.375 in stainless steel tubing...
  • Page 21 Support brackets* 12 in. (30 cm) Hose will soften min. radius* 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. (recommended) Use full size condensate tee at low point.
  • Page 22 Primary Voltage Wiring Cylinder Plugs Ground Lug Remote Electrical Bracket (on cabinet ATT or ground wire on bracket REM) Cabinet ground wire Secure wires with tie wraps to tabs provided in mounting bracket Note: Ensure mains voltage and HWS jumper settings match operating voltage (see table below for setting, see Figure 21 for jumper location).
  • Page 23 Control Wiring Contactor Contactor Ground 24 VAC On/Off Safety Loop Tie wrap Control wires to tabs Signal provided Cut-out in cover Mandatory Wiring: for wiring Use min. 18 AWG and keep as short as possible. 24 VAC to fuse connected to On/Off/Drain switch and to power relay 0.25 in.
  • Page 24 The optional Modbus interface board can be installed onto the MES2 control board to provide Modbus control of the MES2. In order for Modbus control to be active a jumper must be installed on J26 of the control board. See Modbus Configuration on page 27 for information on configuring Modbus communication.
  • Page 25 MES2 Installation Checklist Unit Serial #: _________________ No. of humidifiers: _______ Tag: _______________ Unit type: _______ __________ Voltage: ________V/_____ph Cylinder type: Customer/Job: Address: WATER QUALITY: Well water  City water  POWER:  Voltage, amp, fuse per Spec Label: yes  no ...

  • Page 26: Operation

    Operation 24 User Interface LED Status Lights On/Off Drain Switch 25 Humidifier Configuration Capacity Adjustment Mains Voltage Select (J1 to J6) High Water Sensor Voltage (J8 and J9) On/Off or Modulating Control (J10) Modulation Offset (J13) Ground Fault Interrupt (GFI) (J15) Modbus Control (J26) 27 Modbus Configuration Modbus Addresses...

  • Page 27: Led Status Lights

    On/Off Drain Switch The On/Off Drain switch turns on power to the MES2 control board or to the MES2’s drain valve. For normal operation the switch should be set to the On position.
  • Page 28 If required several settings can be made using jumpers on the MES2’s control board. The output of the MES2 can also be reduced by using a potentiometer on the MES2’s control board. See Figure 21: MES2 Control Board Jumpers for location of jumpers and the capacity adjustment potentiometer.

  • Page 29: Capacity Adjustment

    Figure 22: Capacity Potentiometer Adjustment Mains Voltage Select (J1 to J6) The jumper setting must be set to match the operating voltage of the humidifier. The MES2 is factory calibrated to provide maximum output over a range of operating voltages depending on the setting of J1 to J6.

  • Page 30: Ground Fault Interrupt (Gfi) (J)

    Ground Fault Interrupt (GFI) (J15) Ground current leakage can occur when the humidifier performs drains. With jumper J15 the MES2 can be configured to turn off the power to the electrodes whenever a drain takes place. See Table 6 for correct jumper placement.
  • Page 31 Table 7: Modbus Addresses (Continued) Function Description Address Details Force Drain When written to (FF), will interrupt the 40005 255 will start the process, 0 will be humidification process and activate the accepted, to clear if the request has not humidifier drain valve.
  • Page 32 Function Description Address Details Steam The current steam output in Kg/Hr. or 30105 Hex value representing the humidifies output LBS/hr See UNITS (Modbus 40031) steam output in kg/hr Resolution: 0.10 kg or LBS Example: 013B (hex) = 31.5 kg/hr or LBS/hr Run hour The number of hours the humidifier has 30106...
  • Page 33 Note: If operated on low conductivity water it may take several hours for the MES2 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.

  • Page 34: Maintenance And Servicing

    Maintenance and Servicing 32 Required Maintenance Cylinder Spent Fault Replacement Cylinder Removing the Cylinder Drain Valve Cleaning Installing the New Cylinder 36 Extended Shutdown Starting After Extended Shutdown 37 MES2 Maintenance Checklist 31 | Maintenance and Servicing...

  • Page 35: Cylinder Spent Fault

    Cylinder Spent Fault When the cylinder is spent the MES2 will stop operating and the yellow LED will flash in a repeating pattern of 4 flashes. At this time the cylinder must be replaced. See Table 7: Troubleshooting MES2 Faults on page 43 for more information on other flash sequences.

  • Page 36: Removing The Cylinder

    Removing the Cylinder Warning  Check to see if yellow service LED is flashing (see Figure 20: User Interface on page 24) then disconnect main power at the external disconnect before any servicing.  The inside of the humidifier’s cabinet contains high voltage components and wiring.

  • Page 37: 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 38: Installing The New Cylinder

    Plunger Spring (Note Orientation) Sleeve Solenoid Figure 26: 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 39: Starting After Extended Shutdown

    Note: As long as the MES2 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 40 MES2 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 41 Maintenance and Servicing | 38...

  • Page 42: Troubleshooting

    Troubleshooting 40 Organization of Troubleshooting Chapter 40 Troubleshooting Requirements 41 General Troubleshooting Humidifier Steam Distributors Modbus 42 MES2 Faults LED Flash Sequence Clearing a Fault 45 MES2 Wiring Diagram 39 | Troubleshooting...

  • Page 43: Organization Of Troubleshooting Chapter

     Familiarize yourself with the operation of the humidifier by reading the Operation Chapter on page 24 and the section describing How the Humidifier Works on page 9 in this manual.  A generic copy of the MES2 wiring diagram is included at the end of this chapter for reference purposes.

  • Page 44: General Troubleshooting

    The following section provides general guidelines for troubleshooting the MES2 humidifier and auxiliary components. For detailed troubleshooting information refer to the manuals that were provided with auxiliary equipment and to Table 7: Troubleshooting MES2 Faults on page 43. Humidifier Table 6: General Troubleshooting...

  • Page 45: 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 46: Mes2 Faults

    The self-diagnostic system built into the MES2 is continually monitoring the operation of the humidifier. When an abnormal condition occurs that cannot be self corrected by the software the MES2 will turn off power to the cylinder, drain the cylinder, and annunciate the fault using the yellow status LED.
  • Page 47 Table 7: Troubleshooting MES2 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...

  • Page 48: Wiring Diagram

    Primary Voltage Wiring ( PVW ) units which will come with all primary wiring to the cylinder and 10’ of wiring to run the electrical back to the contactor MES2 with Optional Modbus board WIRING DIAGRAM DIAGRAM NUMBER 2553788 Rev. B...

  • Page 49: Spare Parts| 46

    Exploded View and Spare Parts List Spare Parts| 46...
  • Page 50 MES2 Spare Parts Figure 28: MES2 Spare Parts 47 | Spare Parts...
  • Page 51 Table 8: MES2 Spare Parts List Item Description Part No. 5 lb/hr 10 lb/hr 15 lb/hr 20 lb/hr 25 lb/hr 30 lb/hr 11.4 13.6 kg/hr kg/hr kg/hr kg/hr kg/hr kg/hr PCB MES2, 208-600V, 1 PH 2554100 2554101 2554102 2554104 PCB MES2, 208-600V, 3 PH...
  • Page 52 49 | Warranty...

  • Page 53: 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 54 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: nortec@waltermeier.com WEBSITE: www.humidity.com www.norteconline.com Certificate No. 002419...

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