DriSteem VAPOR-LOGIC Version 6 Installation And Operation Manual
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DriSteem VAPOR-LOGIC Version 6 Installation And Operation Manual

DriSteem VAPOR-LOGIC Version 6 Installation And Operation Manual

Humidifier control system
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VAPOR-LOGIC
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Hu mi di fier C o ntr o l S y s te m
Installation and
Operation Manual
6

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Summary of Contents for DriSteem VAPOR-LOGIC Version 6

  • Page 1 READ AND SAVE THESE INSTRUCTIONS VAPOR-LOGIC ® VERSION Hu mi di fier C o ntr o l S y s te m Installation and Operation Manual...

  • Page 2: Table Of Contents

    Table of contents DriSteem Technical Support ® WARNINGS AND CAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  • Page 3 Table of contents Options and features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Duct high limit switch option .

  • Page 4: Warnings And Cautions

    IOM, resulting in property damage, personal injury, or death . If the IOM is missing, go to www .dristeem .com to download a replacement . Hot surfaces and hot water Steam humidification systems have extremely hot surfaces, and water in tanks, electrode cylinders, steam pipes, and dispersion assemblies can be as hot as 212 °F (100 °C) .

  • Page 5: Overview

    OVERVIEW Vapor-logic capabilities ACCURATE, RESPONSIVE CONTROL The Vapor-logic controller provides accurate, responsive RH control . PID control tunes the system for maximum performance . Modbus , BACnet , or LonTalk allow interoperability with multiple building ® ® ® automation systems . Modbus is standard, and BACnet or LonTalk are available options .
  • Page 6 OVERVIEW Vapor-logic capabilities Enhanced diagnostics include: Insert a USB flash drive • Test outputs function using display or Web interface to verify component into the Vapor-logic operation board’s USB port to perform software • Test humidifier function using simulated demand to validate performance updates, download data logs, and back up and restore data .

  • Page 7: Humidification System Overview

    Web interface on a computer . A GTS humidifier is shown here, with display mounted on the cabinet . Other types of DriSteem humidifiers can have the display contained within a control cabinet or mounted remotely .

  • Page 8: Vapor-Logic Board

    OVERVIEW Vapor-logic board : Components FIGURE 4-1: VAPOR-LOGIC CONTROL BOARD Factory connection points for drain, fill, etc . Power connection Ethernet connection for computer network and/or BACnet/IP Display connection Field connection points for transmitters, Factory connection points airflow switch, etc . for water level control, gas valves, etc .
  • Page 9 OVERVIEW Vapor-logic board: Connections FIGURE 5-1: VAPOR-LOGIC CONTROL BOARD CONNECTIONS D4 , 21 VDC indicator P19: 24vac = Power to board = Ground for blower or steam valve = Ground for power return SSR/BL = All blowers Low = Low water probe Mid = Mid water probe P18: (all are 24VAC outputs) Top = Top water probe...

  • Page 10: Display

    OVERVIEW Display FIGURE 6-1: USING THE VAPOR-LOGIC DISPLAY Typical Home screen The time and the date as stored on the The banner at the top of the home Vapor-logic control board . screen displays the model number or name of the humidifier . Go to the settings menu to give the humidifier a name and view the serial number .

  • Page 11: Web Interface

    OVERVIEW Web interface FIGURE 7-1: USING THE VAPOR-LOGIC WEB INTERFACE (SETUP SCREEN SHOWN) Click on a tab label to move to another screen Click on CHANGE to change value Click here to view alarms Click here to view messages Click on label to contract (–) or expand (+) menu item...

  • Page 12: Installation

    INSTALLATION Pre-installation Checklist ☐ See Figure 8-1 for field terminal block locations . Note FIGURE 8-1: VAPOR-LOGIC CONTROL BOARD DETAIL that field wiring connection locations on the Vapor-logic Board detail showing white border board are surrounded with a white border . ☐...
  • Page 13 INSTALLATION Pre-installation Checklist FIGURE 9-1: VAPOR-LOGIC TERMINAL BLOCK DETAIL AND CONNECTION INSTRUCTIONS FPsw Top Mid Low 24VAC DSTEEM Fieldbus Tighten screw after wire is inserted . Maximum torque is Terminal block plug . 3 in-lb (0 .34 N-m) Make connections when the plug is Remove insulation attached to the...

  • Page 14: Installation Process

    INSTALLATION Installation process The Vapor-logic board is designed to make installation very easy: • Terminal blocks that require field connections are outlined in white . • Terminal plugs can be removed to allow easy access when inserting wires and tightening screws . •...

  • Page 15: Vapor-Logic Display

    INSTALLATION Installation process • Communication connections • Vapor-logic display • Ethernet • Modbus • BACnet • LonTalk • Multiple-tank communication • Programmable relays • Area-type, SDU dispersion fans, or steam blowers 2 . Complete the Setup process . See instructions beginning on Page 27 . 3 .
  • Page 16 • RH transmitter or dew point transmitter Transmitters provide a signal proportional to the RH or dew point being measured . All transmitters provided by DriSteem are two-wire devices using a 4 to 20 mA signal . • Demand signal by others Demand signals are sent to the Vapor-logic board from another control system such as a building automation system .

  • Page 17: Field Wiring

    INSTALLATION Step 1 – Field wiring: Control input FIGURE 13-1: VAPOR-LOGIC CONTROL INPUT WIRING CONNECTIONS Signal by others 0-10 VDC 4-20 mA Vapor-logic Vapor-logic Input resistance 21VDC 21VDC 500 ohms Control panel Control panel 2-wire #18GA 2-wire #18GA shield GND lug shield GND lug Shield cable Shield cable...
  • Page 18 INSTALLATION Step 1 – Field wiring: Control input signals DriSteem offers three control options for all its humidification systems controlled by Vapor-logic: On-off control, demand signal control, and transmitter control . ON-OFF CONTROL On-off control—the simplest control scheme—does exactly what its name implies: the output device turns fully on, then fully off .
  • Page 19 50% of capacity; and a 20 mA signal causes the humidifier to run at 100% capacity . With a humidistat provided by DriSteem producing this signal, the humidity set point is set at the humidistat . The display then is used for maintaining and troubleshooting the humidification system, with humidifier control stemming from the humidistat itself .
  • Page 20 INSTALLATION Step 1 – Field wiring: Limit controls AIRFLOW PROVING SWITCH FIGURE 16-1: TERMINAL P13 Connect wiring for a duct airflow proving switch or Space Distribution Unit (SDU) airflow proving switch by inserting wires into the terminal block plug at P13 (labeled AFsw and 24vac) per the wiring diagram on the next page . Tighten screws;...
  • Page 21 INSTALLATION Step 1 – Field wiring: Limit controls FIGURE 17-1: VAPOR-LOGIC LIMIT CONTROLS WIRING CONNECTIONS Note: An airflow switch must be used in any duct humidification application . If no airflow switch Air ow switch in a duct When using an SDU is used, install shunt at P13 (24VAC to AFSW) .
  • Page 22 INSTALLATION Step 1 – Field wiring: Limit controls Connect wiring for a temperature compensation transmitter or an auxiliary FIGURE 18-1: TERMINAL P14 temperature sensor by inserting wires into the terminal block plug at P14 (labeled 21vdc and TS) per the wiring diagram on the previous page . Tighten screws;...
  • Page 23 See Caution at right before routing cable . Terminal P10: Display If a longer display cable is needed, order a replacement cable from DriSteem (see the replacement parts section of this manual), or use a four-conductor straight-through cable or a six-conductor, crossover, twisted pair cable CAUTION connected to an RJ11 jack .
  • Page 24 INSTALLATION Step 1 – Field wiring: Communication connections FIGURE 20-1: VAPOR-LOGIC COMMUNICATION WIRING CONNECTIONS PC or BACnet IP Ethernet connection J1001: Install jumper if multi-tank RJ11 cable system and controller is at end of communications link Vapor-logic touchscreen display Previous BACnet Next multitank humidifier MSTP or Modbus device...
  • Page 25 INSTALLATION Step 1 – Field wiring: Communication connections WEB INTERFACE COMMUNICATION FIGURE 21-1: TERMINAL P9 Utilizing the Vapor-logic Web interface is optional . The humidifier can be operated using the touchscreen display and/or the Web interface . When using the Web interface, the humidifier can be accessed by a computer either directly or through a network .
  • Page 26 INSTALLATION Step 1 – Field wiring: Communication connections After a system prompt appears, type in ipconfig and then hit Enter . The current IP address for the Ethernet adapter Local Area Connection should appear . If the first three segments of that IP address are different than the first three segments of the humidifier’s default IP (192 .168 .1 .xxx), you must change either your computer or Vapor-logic’s IP address such that they match each other .
  • Page 27 INSTALLATION Step 1 – Field wiring: Communication connections 4 . Connect to the humidifier . FIGURE 23-1: ENTERING THE IP ADDRESS a . Using a computer connected to the Vapor-logic board, open a Web browser such as Mozilla Firefox or Internet Explorer ®...
  • Page 28 INSTALLATION Step 1 – Field wiring PROGRAMMABLE RELAYS (DRY CONTACT) FIGURE 24-1: TERMINAL P12 AND P16 See “Programmable relay maximum current” in Caution below . See Figure 25-1 . Connect wiring for remote signaling using a programmable relay (dry contact) by inserting wires into the terminal block plug at P12 or P16, per the wiring diagram in Figure 25-1 .
  • Page 29 INSTALLATION Step 1 – Field wiring FIGURE 25-1: VAPOR-LOGIC PROGRAMMABLE RELAY WIRING CONNECTIONS FIGURE 25-2: TERMINAL P15 Vapor-logic relay #1 Vapor-logic relay #2 Normally open #1 Normally open #2 Common #1 Terminal Contacts rated 125 Common #2 VAC/3 AMP or 30 VDC/3 AMP, optional by others Control circuit wiring...

  • Page 30: Sensor Placement

    INSTALLATION Step 1 – Field wiring: Sensor placement HUMIDISTAT AND SENSOR LOCATIONS ARE CRITICAL Other factors affecting humidity control Humidistat and sensor location have a significant impact on humidifier Humidity control involves more than the controller’s ability to control the system . Other performance .

  • Page 31: Step 2 - Setup

    INSTALLATION Step 2 – Setup To simplify the field-installation process, humidifiers are sent from the factory FIGURE 27-2: SETTINGS configured as ordered . However, some settings are unknown at the factory and need to be defined during the setup process using the Settings menu . The Settings menu is also where you make future system setting changes .

  • Page 32: Using The Web Interface

    INSTALLATION Step 2 – Setup USING THE WEB INTERFACE Although not required for humidifier operation, the Web interface allows convenient and remote access to Vapor-logic . See Page 21 for Web interface connection and IP address instructions . Follow the instructions below to complete the setup process . FIGURE 28-1: USING THE VAPOR-LOGIC WEB INTERFACE ( SETUP SCREEN SHOWN)
  • Page 33 Type chosen must match hard wired input RH Transmitter 4-20mA room or duct sensor RH Setpoint RH Offset PID tuning PID band DriSteem recommends using default values Proportional gain 1000 for offsets and PID settings when first setting Integral gain 1000 up your humidifer .
  • Page 34 INSTALLATION Step 2 – Setup Table 30-1: Settings menu (continued) Minimum Maximum Menu item Default value Units Notes value value Fan Dispersion Fan Type Space Distribution Unit Fan Off Delay Minutes Area-Type Fan Auxiliary Temperature Sensor Purpose Not Used Temperature Compensation °F Sensor Offset...
  • Page 35 INSTALLATION Step 2 – Setup Table 30-1: Settings menu (continued) Minimum Maximum Menu item Default value Units Notes value value Water Management When enabled, the humidifier automatically drains and Automatic Drain Sequence then flushes the tank at user-defined (Static) or automatic (Smart) intervals .
  • Page 36 INSTALLATION Step 2 – Setup Table 30-1: Settings menu (continued) Minimum Menu item Default value Maximum value Units Notes value Aquastat The minimum aquastat setting prevents tank water freezing . Higher settings keep tank water warm, Aquastat Feature Enabled reducing time required to bring water to boiling after a call for humidity .
  • Page 37 INSTALLATION Step 2 – Setup Table 30-1: Settings menu (continued) Minimum Menu item Default value Maximum value Units Notes value Modbus Communication Type BACnet MS/TP Comm Channel 38400 19200 76800 BACnet MS/TP Settings Device Instance 4194303 Max Masters MAC Address Max Info Frames BACnet IP Device Instance...
  • Page 38 INSTALLATION Step 2 – Setup Table 30-1: Settings menu (continued) Minimum Menu item Default value Maximum value Units Notes value inch-pound Units inch-pound SI units Idle Time-Out Select number of minutes the touchscreen display Idle Time-Out Minutes remains idle before returning to the Home screen . Brightness Adjust Brightness Use 100% brightness outdoors .

  • Page 39: Step 3 - Startup

    . The QR code will bring you to the downloadable Installation and Operation Manual on dristeem .com . VAPOR-LOGIC VERSION 6 INSTALLATION AND OPERATION MANUAL ®...

  • Page 40: Operation

    OPERATION Using menus and screens VAPOR-LOGIC DISPLAY HAS THE FOLLOWING MENUS AND SCREENS: FIGURE 36-1: • Home screen TOUCHSCREEN DISPLAY HOME SCREEN • Submenus: • Status • Help • Alerts • Settings The items on the Web interface Diagnostics screen have been moved on the touchscreen .

  • Page 41: Home Screen (Touchscreen Display)

    OPERATION Home screen (touchscreen display) Vapor-logic returns to the Home screen on the touchscreen display after a user- FIGURE 37-1: WATER LEVEL CONTROL defined period of idleness . The Home screen displays the items most frequently viewed: Actual space RH or dew point, RH or dew point set point, tank/system output or steam demand, humidifier mode, and tank activities such as starting up, humidifying, heating, and auto drain .

  • Page 42: Status Screen

    OPERATION Status screen Using either the touchscreen display or the Web interface, the Status screen is where all humidifier parameters can be viewed . On the touchscreen only Quick Diagnosis provides a way to view if all requirements for safe operation have been met .
  • Page 43 OPERATION Status screen Table 39-1: Status screen Note: Your system might not have all of the items listed in this table (Pages 39 and 42) . Minimum Maximum Menu item Default value Units Notes value value Operating mode of humidifier . Choose from Auto, Standby, or Drain . •...
  • Page 44 OPERATION Status screen Table 41-1: Status screen (continued) Minimum Maximum Menu item Default value Units Notes value value Board voltage Board temp °F High probe signal 14000 counts High water probe Water No water Mid probe signal 14000 counts Mid water probe Water No water Low probe signal...
  • Page 45 OPERATION Status screen Table 41-1: Status screen (continued) Minimum Maximum Menu item Default value Units Notes value value Combust air switch Flow No Flow Power vent switch Open Closed Flue pressure switch Open Closed °F Flue temperature °C °F Drain temperature °C Temperature switches Open...

  • Page 46: System Alerts

    OPERATION System alerts The active Alerts menu displays active system alarms and messages as Red, FIGURE 42-1: TOUCHSCREEN Yellow and White alerts . Using the touchscreen, go to the Alerts menu by pressing the Alerts icon, or by pressing the Home icon and then the Alerts icon .
  • Page 47 OPERATION System alerts FIGURE 43-1: VAPOR-LOGIC WEB INTERFACE ALARMS SCREEN VAPOR-LOGIC VERSION 6 INSTALLATION AND OPERATION MANUAL ®...
  • Page 48 OPERATION System alerts Table 44-1: Alerts menu Does alert Alert label Description auto-clear? Red Alerts Tank temp sensor failed Tank temp sensor has failed . Fault occurs at boiling temperature plus 25 °F (13 °C) . All units are put into a keep cool state where Tank overtemp fill and drain cycles operate to keep tank cool .
  • Page 49 OPERATION System alerts Table 45-1: Alerts menu (continued) Does alarm Alerts label Description auto-clear? The listed flue temperature switch or tank temperature switch has opened . These switches will close after Flue or tank over-temp cutout the system has cooled . Flue sensor out of range Flue temperature sensor signal is out of range .

  • Page 50: Status Led (Vapor-Logic Control Board)

    OPERATION Status LED (Vapor-logic control board) STATUS LED (VAPOR-LOGIC CONTROL BOARD) The Vapor-logic control board includes a diagnostic Status LED that shows multiple humidifier control conditions . The Status LED blinks in a 3-stage cycle over approximately four seconds . The Status LED is always “blinking” . It will be easy to see that the board is powered and operating because, at a minimum, it is running the Status LED .
  • Page 51 OPERATION Status LED (Vapor-logic control board) VAPOR-LOGIC CONTROL BOARD STATUS LED (CONTINUED) Table 47-1: Vapor-logic control board LED indicators First Blink Second Blink Third Blink LED Indicator Faults Communications status Demand/call for humidification Touchscreen display is attached and Green Auto mode: no faults Humidification demand is present working Auto mode: active message...

  • Page 52: Status Led (Touchscreen)

    OPERATION Status LED (Touchscreen) STATUS LED (TOUCHSCREEN) The LED on the Vapor-logic touchscreen is located on the front, just below the active touch area . It remains solidly lit as long as there is power (even when the Touchscreen is in sleep mode) . The color indications are similar to those for the Vapor-logic LED but it does not have a three blink sequence .

  • Page 53: Pid Tuning

    OPERATION PID tuning When your system has a humidity or dew point transmitter, you can adjust Settings menu The Settings menu is where system parameters and control the set point through the touchscreen or Web interface using a can be changed . This menu is used primarily proportional, integral, and derivative (PID) control loop .

  • Page 54: The Integral Term

    OPERATION PID tuning THE INTEGRAL TERM The integral term is an accumulation of RH error over time multiplied by the integral gain . Every 1/10 second when the demand is updated, the instantaneous RH error (RH set point – actual RH) is added to a temporary variable that accumulates the error .

  • Page 55: The Derivative Term

    OPERATION PID tuning THE DERIVATIVE TERM The derivative term is the measured change in error over time multiplied by the derivative gain (differentiating error with respect to time) . If the actual measured RH is below set point and is rising, the derivative term subtracts from the demand in anticipation of the approaching set point .

  • Page 56: Pid Setup Tips

    OPERATION PID tuning PID SETUP TIPS A large PID band (10% to 20%) yields tighter and more stable control with longer response times . A small PID band produces quicker response times, but control may become unstable if the RH regularly goes outside the band . As a rule, start with a PID band of 10% .

  • Page 57: Universal Water Level Control

    . The user does not need to select a new Damage caused by chloride corrosion water type or change hardware to change water types . Additional valves is not covered by your DriSteem and Vapor-logic algorithms measure and control the water level for optimum warranty .

  • Page 58: Automatic Drain Sequence, All Water Types

    Settings menu . For RO/DI water DriSteem recommends enabling the automatic drain sequence with the Smart Drain option . The humidifier will drain very infrequently but just enough to protect the tank from aggressive water .

  • Page 59: Options And Features

    . DUCT HIGH LIMIT SWITCH OPTION When a duct high limit option is ordered, DriSteem provides either a duct high limit switch or a duct high limit humidity transmitter (4 to 20 mA output, 0 to 100% RH range) for duct mounting .

  • Page 60: Temperature Compensation Control Option

    Status menu of the touchscreen or Diagnostics menu of the Web interface menu . AUXILIARY TEMPERATURE SENSOR OPTION When selected as an option, DriSteem provides a temperature sensor for monitoring temperature in a duct or space . Temperature from this sensor can be viewed from the Status menu (“Aux temperature”) .

  • Page 61: Aquastat Set Point Feature

    Note: The Fan Dispersion option appears in the Settings menu of the touchscreen only if the humidifier was originally ordered with fan or SDU dispersion . To change to duct dispersion, consult with DriSteem technical support and use the Web interface to choose Fan Dispersion .

  • Page 62: Sensor Offsets

    OPERATION Options and features SENSOR OFFSETS All external transmitters shipped with Vapor-logic can be field calibrated from the Settings menu . For example, if the system is equipped with an RH transmitter, there is an RH offset setting . The factory default for all transmitter offset settings is zero . The sensors that have this adjustment capability are the humidity, duct high limit, temperature compensation, and dew point transmitters .

  • Page 63: Setting Date And Time

    Require Passcode: Yes . If security is required and the passcode was not set, try the Vapor-logic default of 0000 . If a passcode has been set and then forgotten, contact DriSteem Technical Support . VAPOR-LOGIC VERSION 6 INSTALLATION AND OPERATION MANUAL...

  • Page 64: Downloading Historical Data

    OPERATION Options and features DOWNLOADING HISTORICAL DATA Note: Data is saved to nonvolatile memory every 60 minutes . If unit power is lost, Vapor-logic acquires data at a default interval of once a minute and retains it up to 60 minutes of data could be lost . for 21 rolling days or 30,000 data points, including the most recent 60 alerts .

  • Page 65: Firmware Updates

    USB port on each device . Firmware updates are available at no charge on the DriSteem website . One download from the DriSteem web site will give you all files needed to update both Vapor-logic and the touchscreen display .
  • Page 66 Downloading Vapor-logic firmware updates 1 . Click the link shown to the right on the Vapor-logic firmware updates page of www .dristeem .com . If a security window appears, click the Save button . Note: Your browser and operating system might be set up differently, the screenshots are provided as a general road map .
  • Page 67 OPERATION Firmware updates Table 62-1: Downloading Vapor-logic firmware updates (continued) 6 . Click the Browse button in the WinZip Self-Extractor window, and select your USB flash drive as the target location . 7 . Click the Unzip button in the WinZip Self-Extractor window . A WinZip window opens to confirm that the firmware update has been unzipped .

  • Page 68: Installing Firmware Updates

    OPERATION Firmware updates INSTALLING FIRMWARE UPDATES WARNING 1 . Place the humidifier system in Standby mode . 2 . IMPORTANT: To prevent static damage to the USB flash drive and Electric shock hazard controller, ground yourself by briefly touching the humidifier’s electrical All circuits must be energized for this subpanel before touching any part of the controller board or doing Step 3 .

  • Page 69: Test Outputs And Test Run

    OPERATION Test outputs and test run TEST OUTPUTS When completing an installation or repair, cycle all outputs, such as fill valve, drain valve, etc ., to verify operation . Go to the test outputs section of the Settings menu and scroll through each connected output to verify operation . During testing, the humidifier mode changes to Standby and the tank status changes to Test .

  • Page 70: Modbus, Bacnet, Lontalk Interoperability

    . Variables are defined in the tables on the following pages . 1 . Remove LON ProtoCessor module from box . Note: For LonTalk installations, contact your local DriSteem representative to purchase a LonTalk upgrade . CONNECTIONS 1 . If connecting to a Modbus or BACnet MS/TP system, connect Modbus or BACnet system wiring to terminal P7 on the Vapor-logic board (positive to positive, negative to negative) .
  • Page 71 OPERATION Modbus, BACnet, LonTalk interoperability Note: The interoperability partner will see the full list with points that apply to other models . The following is a subset of that list and includes only the points that are applicable to the GTS humidifier LX series . Table 67-1: GTS humidifier LX series interoperability variable and object names Read Only...
  • Page 72 OPERATION Modbus, BACnet, LonTalk interoperability Table 68-1: GTS humidifier LX series interoperability variable and object names (continued) Read Only BACnet Units Range Modbus Variable name and (RO) or Object LonTalk variable register Description BACnet object name Read Write Type and names** number* I-P units SI units...
  • Page 73 OPERATION Modbus, BACnet, LonTalk interoperability Table 69-1: GTS humidifier LX series interoperability variable and object names (continued) Read Only BACnet Units Range Modbus Variable name and (RO) or Object LonTalk variable register Description BACnet object name Read Write Type and names** number* I-P units SI units...
  • Page 74 OPERATION Modbus, BACnet, LonTalk interoperability Table 70-1: GTS humidifier LX series interoperability variable and object names (continued) Read Only BACnet Units Range Modbus Variable name and (RO) or Object LonTalk variable register Description BACnet object name Read Write Type and names** number* I-P units SI units I-P units SI units...
  • Page 75 OPERATION Modbus, BACnet, LonTalk interoperability Table 71-1: GTS humidifier LX series interoperability variable and object names (continued) Read Only BACnet Units Range Modbus Variable name and (RO) or Object LonTalk variable register Description BACnet object name Read Write Type and names** number* I-P units SI units I-P units SI units...
  • Page 76 OPERATION Modbus, BACnet, LonTalk interoperability Table 72-1: GTS humidifier LX series interoperability variable and object names (continued) Read Only BACnet Units Range Modbus Variable name and (RO) or Object LonTalk variable register Description BACnet object name Read Write Type and names** number* I-P units SI units I-P units SI units...
  • Page 77 OPERATION Modbus, BACnet, LonTalk interoperability Table 73-1: GTS humidifier LX series interoperability variable and object names (continued) Read Only BACnet Units Range Modbus Variable name and (RO) or Object LonTalk variable register Description BACnet object name Read Write Type and names** number* I-P units SI units I-P units SI units...

  • Page 78: Multiple-Tank Operation

    The master controller also gives permission to slave humidifier tanks to perform functions, such as draining and flushing . The master controller must be • field-wired to all required control input signals, • connected to all slave tanks via the DriSteem fieldbus, • powered during system operation . MULTI-TANK CONTROL INTERFACE Most systems have one Vapor-logic touchscreen per multi-tank group .

  • Page 79: Tank Grouping To Maximize Efficiency

    OPERATION Multiple-tank operation TANK GROUPING TO MAXIMIZE EFFICIENCY Configuration tips Priority 1 and priority 2 tanks can be grouped to improve efficiency . Tanks not • Use priority groups 1 and 2 to group tanks for maximum energy efficiency . For example, identified as trim or redundant tanks are factory-assigned to priority groups 1 put gas-fired tanks in group 1 and electric and 2 .
  • Page 80 OPERATION Multiple-tank operation Table 76-1: Multitank priority groups application example Priority Assignment Description Application considerations group • Provides humidification load “throttling,” this unit sees the small changes as demand An SSR-controlled electric resistive changes . unit will provide the best control . Trim •...

  • Page 81: Wiring A Multi-Tank Group Of Humidifiers

    3 . Wire all control boards of the multi-tank group together using twisted pair wire . • Important: DriSteem recommends using one pair of wires of a Cat-5 cable . Do not use non-twisted two-conductor wire . • Connect controller boards together at terminal block P8 . Connect positive to positive terminals, and negative to negative terminals .

  • Page 82: Changing A Priority Group

    OPERATION Multiple-tank operation CHANGING A PRIORITY GROUP To change a priority group, go to the Settings menu to access Multi-tank setup/ Tank priority group . To add a tank to a multi-tank system: 1 . Verify that the new tank has the correct tank designator . Change, if necessary, before wiring in Step 2 .
  • Page 83 OPERATION Multiple-tank operation USING THE WEB INTERFACE Additional Web interface screens, described below, appear when operating in multi-tank mode . This letter identifies which tank (A . . . P) you are viewing . Each connected tank automatically shows up as a link . Click on a tank link to view its status .

  • Page 84: Troubleshooting

    If you have a tank-related or dispersion-related issue, you may also need to refer to those specific product manuals . 3 . If you’re still having issues, call DriSteem . If the troubleshooting guide does not help you solve your issue, call DriSteem with the following information available: •...
  • Page 85 Vapor-logic board . • Check cable from Vapor-logic to display is a DriSteem supplied cable . Regular phone cables will fit in the jack but will not allow voltage to the display . • Humidifier over-temperature thermostat open •...
  • Page 86 . If voltage does not return, replace the Vapor-logic board . • Isolation control board by others may not be compatible . Consult DriSteem . • SDU blower or airflow proving switch is • Check SDU for proper wiring .
  • Page 87 • Check arrow direction on valve; or ”In” should be visible on fill valve body . • Excessive condensate is draining into the tank • Consult DriSteem to increase the amount of water that can be converted to steam before receiving a fault . • Drain valve not fully closed •...
  • Page 88 TROUBLESHOOTING Troubleshooting guide Table 84-1: Troubleshooting guide (continued) Issue Possible causes Actions Unit does not fill with water . • Malfunctioning fill valve • Unplug probe head . Fill valve should open . If fill valve does not open, verify proper 24 VAC to fill valve . If voltage is present and valve does not open, replace valve or valve coil .
  • Page 89 TROUBLESHOOTING Troubleshooting guide Table 85-1: Troubleshooting guide (continued) Issue Possible causes Actions Alerts: • Tank drain outlet • If the humidifier tank drain outlet is plugged, clean . Tank not draining • Water detection probes • Clean probe or replace probe rod assembly . •...
  • Page 90 TROUBLESHOOTING Troubleshooting guide Table 86-1: Troubleshooting guide (continued) Issue Possible causes Actions Alert: • Open, shorted, or incorrect wiring of sensor • Check wiring terminals for correct wiring and voltages . Tank temperature sensor 1000 Ohms = 68 °F (20 °C); 1702 Ohms = 212 °F (100 °C) . failed •...
  • Page 91 • Verify proper operation of fans, dampers, VAV systems, etc . • Humidity control input type not the same as • Check Vapor-logic control board connections P11 and P13 . Vapor-logic firmware Consult DriSteem . • Vapor-logic not in Auto mode • Change mode to Auto . Continued...
  • Page 92 Humidity above set point • High entering relative humidity • Dehumidify . • Unit oversized • Consult DriSteem . • Reduced airflow • Check fans, dampers, VAV systems, etc . • Improperly located humidistat or humidity • Relocate, using guidelines in Appendix section of this manual .
  • Page 93 TROUBLESHOOTING Troubleshooting guide Table 89-1: Troubleshooting guide (continued) Issue Possible causes Actions Alert: Blocked flue • Blocked flue sensor is open • Check venting system for obstructions . • Check air line to flue switch for obstructions . • Windy conditions cause downdrafts in venting system . Install a high wind vent cap or isolate as recommended by local codes .

  • Page 94: Replacement Parts

    Kit (includes main controller and required Molex plugs) 183504-004 Touchscreen display - GTS LX series only 183508-001 27" (686 mm) 408490-014 Touchscreen display communication cable (contact DriSteem for lengths other than 27" (686 mm) and 60" (1524 mm) 60" (1524 mm) 408490-009 Grip elastomeric touchscreen display 408494-023...
  • Page 95 Notes VAPOR-LOGIC VERSION 6 INSTALLATION AND OPERATION MANUAL ®...

  • Page 96: Warranty

    DriSteem in writing within the stated warranty period . Defective parts may be required to be returned to DriSteem . Excluded from the Limited Warranty are all consumable and wear and tear items such as cylinders, membranes, filters, or media replacements .

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