DriSteem Vapor-Logic Installation Instructions & Maintenance Operations Manual
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DriSteem Vapor-Logic Installation Instructions & Maintenance Operations Manual

DriSteem Vapor-Logic Installation Instructions & Maintenance Operations Manual

Microprocessor humidifier control system
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®
VAPOR-LOGIC
MICROPROCESSOR HUMIDIFIER

CONTROL SYSTEM

INSTALLATION INSTRUCTIONS &
MAINTENANCE OPERATIONS
MANUAL
ä
HUMIDIFIER COMPANY

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Summary of Contents for DriSteem Vapor-Logic

  • Page 1: Control System

    READ AND SAVE THESE INSTRUCTIONS ® VAPOR-LOGIC MICROPROCESSOR HUMIDIFIER CONTROL SYSTEM INSTALLATION INSTRUCTIONS & MAINTENANCE OPERATIONS MANUAL ä HUMIDIFIER COMPANY...

  • Page 2: Table Of Contents

    TO THE PURCHASER AND THE INSTALLER ® Thank you for deciding to purchase the VAPOR-LOGIC microprocessor humidifier control system. We have applied our best efforts in designing and developing this microprocessor to give you total satisfaction and many years of trouble-free service.

  • Page 3: Introduction

    This manual explains the operation of, and gives instruc- • Time proportioning modulation function controls ® tions for, the installation and use of the VAPOR-LOGIC humidifier outputs via cyclic actions on electrical microprocessor. contactors or a modulated pulsed signal to our solid state zero fired SCR power controllers.

  • Page 4: Installation

    The VAPOR-LOGIC control board should always be wired following local and national electric codes. • Never run control system wires bundled with, or in the VAPOR-LOGIC is powered by a low voltage class #2 same conduit as, power wires. control transformer. The transformer provides a 24 VAC supply, protected by an integrally mounted manual reset •...

  • Page 5: Operation

    Important: To properly identify the second remote key the back section, rotate down, and snap front section pad to the master VAPOR-LOGIC microprocessor, a onto the back section. Route modular cable as needed shunt connection is provided and installed by DRI-STEEM to control cabinet and drill necessary hole for appropriate across connector pin J6.
  • Page 6 VAC, 1 amp max.) circuit for remote indication that a fault The humidifier then switches into “STDBY” mode until condition exists. The remote fault indication does not there is a call for humidity, at which time VAPOR-LOGIC indicate which fault has occurred, only that VAPOR-LOGIC automatically resumes normal operation.
  • Page 7 Control Input 4. Terminal 14 sup- Figure 7-1: plies 24 VAC to proving switch circuit, VAPOR-LOGIC printed circuit board SPST, normally closed. Terminal 15 is return connection from proving switch into VAPOR-LOGIC control. Optional freeze protection aquastat uses optically isolated Control Input 5.

  • Page 8: Operation

    • Terminal 4 is the common return path The key pad/digital display completes the advanced for all water detection rods from the VAPOR-LOGIC system. The key pad with the digital LCD humidifier tank ground (yellow pigtail wire read-out provides descriptions of any faults detected by...
  • Page 9 “ENT” key to have ers are incorporated, each humidifier’s fill and VAPOR-LOGIC read the new information and store in the drain valves and contactors are cycled on-off, one microprocessor memory. Press “mode” to return to the humidifier at a time.) No other functions are...
  • Page 10 48% RH, and the actual value is 51%. device accuracies caused by sensor placement, environ- ment, aging, etc. By accessing the VAPOR-LOGIC sub- Access the trim % RH sub-menu as directed menu (press “MODE” key) and scrolling to the appropriate above.
  • Page 11 Remove the connector shunt from the single pin To view present set point, press “ENT” and of J5 and reposition it across the pair of J5 pins. VAPOR-LOGIC will bring up the current informa- tion: Restore power. 1. Set % RH __: 35% RH The display will read: “DISPLAY DIAG.

  • Page 12: Sensing Device Placement And Wiring

    The humidistats are powered by 21 VDC supply provided Accurate control of temperatures in room and ducts is by the VAPOR-LOGIC control board. A 6-9 VDC control also very important to improve control of relative signal is returned to provide the modulating function.
  • Page 13 SENSING DEVICE PLACEMENT AND WIRING OPTION: Variable Air Volume (VAV) (30 feet from the The transmitter provided with VAPOR-LOGIC firmware humidifier.) When the VAV control option is requested, V1.01 through V1.10 (part #405882) is calibrated for DRI-STEEM will provide, in addition to the room control -20°...

  • Page 14: Proper Wiring Procedures

    PROPER WIRING PROCEDURES Electrical currents can produce undesirable effects in • Use separate electrical conduits for line and the electronic control circuits that eventually affect low voltage wiring from the humidifier to controllability. Electrical “noise” is generated by electrical humidity sensors airflow switches etc. equipment, such as switching resistive loads, electric motors, solenoid coils, welding machinery, fluorescent •...

  • Page 15: Terminology

    The greatest potential in this situation would be to control VAPOR-LOGIC gives you the potential for unprecedented away from the desired set point. (See Figure 15-1.) control accuracies. You are able to fine-tune the control system to meet your specific humidification needs.

  • Page 16: Terminology

    The Sample Interval is the interval time (in seconds) taking place and forces the control into the proportioning during which VAPOR-LOGIC reviews all the controlling actions on an accelerated basis to slow the change. parameters (desired and actual RH set points, P.I.D.

  • Page 17: Tuning

    ® VAPOR-LOGIC P.I.D. CONTROL LOOP: TUNING In this section, we will focus on the VAPOR-LOGIC P.I.D. If there are oscillations with the Proportional Band at its controller as the primary control in a closed loop system narrowest setting (not zero), the adjustment of the that needs to be tuned for optimum performance.

  • Page 18: Tuning

    Integral Adjustment The initial setting for the Derivative Adjustment should be The VAPOR-LOGIC Integral Adjustment is tuned at this at the smallest integer possible (least corrective action). point in time to adjust for the droop that is caused by the Increase the integer in small increments and increase the proportional output.

  • Page 19: Vapor-Logic Program Code Nomenclature

    All the combinations represented are supported by appropriate software. Your particular system may not include all the features shown in this program code nomenclature. Always refer to your wiring diagram on the inside of control cabinet door to identify your particular Program Code Number, then decipher your system using VAPOR-LOGIC Program Code described below.

  • Page 20: Main Menu/Auto Scroll Information

    MAIN MENU/AUTO SCROLL INFORMATION The following pages contain information about the digital read-outs and fault conditions that VAPOR-LOGIC communi- cates. This includes a wide variety of present system conditions, faults, and programmable parameters that ultimately control the humidification system, as well as a trouble-shooting guide to help you with operational procedures. The charts are organized based upon when or why the information is communicated.

  • Page 21: Main Menu / Auto Scroll Information

    MAIN MENU/AUTO SCROLL INFORMATION MAIN MENU MAIN MENU AUTO AUTO SCROLL RANGE DEFAULT READ-OUT DESCRIPTION SCROLL READ-OUT Cycle Time (1) 15-99 "SET CYC TIME" TP Type Control 20 seconds seconds "SET CYC TIME" SCR Type Control 4-99 seconds 4 seconds Multiple Heater Delay "SET DLY TIME"...

  • Page 22: Digital Display Read Outs

    VAPOR-LOGIC is in drain mode. "AUTO FLUSH" VAPOR-LOGIC is in flush mode. "LOW WATER" VAPOR-LOGIC has detected low water condition in tank. VAPOR-LOGIC has instructed fill valve to open to fill tank "FILLING" with water. "GLASS TEMP °C" Metric notation of glass temperature.

  • Page 23: Digital Display/Key Pad Trouble Shooting Guide

    VAPOR-LOGIC terminal block J7. Field supplied remote fault Check if lamp is burned out and replace. indicator lamp burned out Remote fault Check relay continuity (VAPOR-LOGIC terminal J7) for VAPOR-LOGIC relay not contact closure. switching NO READABLE No power to Check main supply power.

  • Page 24: Digital Display / Key Pad Trouble Shooting Guide

    DIGITAL DISPLAY/KEY PAD TROUBLE SHOOTING GUIDE PROBLEM POSSIBLE CAUSE RECOMMENDED ACTION NO READABLE Reverse polarity between See page 5 for correct polarity of the modular cable INFORMATION modular cable and plugs connection to cable plugs. DISPLAYED ON KEY PAD (con't.) Digital key pad lock-up Press "RESET"...

  • Page 25: Fault Indicator Codes

    FAULT INDICATOR CODES MASTER SLAVE 1 SLAVE 2 SLAVE 3 FAULT DIGITAL DISPLAY READ-OUT (CODE) (CODE) (CODE) (CODE) SSSSS LSSSS SLSSS LLSSS "1) LOCAL COMM" (Master to local key COMMUNICA- pad communication failure) TION FAILURE "21) REMOTE COMM" (Master to remote key pad communication failure) "2) SLAVE 1 COMM"...
  • Page 26 Check if the tank drain outlet is plugged. Clean outlet if needed. Reset VAPOR-LOGIC. When in the fill sequence, VAPOR-LOGIC allows 40 Check water supply shut-off valve. If it is closed, minutes for the water to reach the maximum proper open the valve.
  • Page 27 FAULT INDICATOR CODES MASTER SLAVE 1 SLAVE 2 SLAVE 3 FAULT DIGITAL DISPLAY READ-OUT (CODE) (CODE) (CODE) (CODE) EEPROM SSSSL LSSSL SLSSL LLSSL "17) MASTER EEPROM" (Master control FAILURE board programming failure) "18) SLAVE 1 EEPROM" (System B control board programming failure) "19) SLAVE 2 EEPROM"...
  • Page 28 Temperature transmitter -20°-120°F should have 12 mA = 50°F (VAPOR-LOGIC firmware V1.01 through V1.10, part #405882). Temperature transmitter -20°-160°F should have 12 mA = 70°F (VAPOR-LOGIC firmware V2.01 and higher, part #405889). Refer to Trim Adjustment on page 20 for further information.

  • Page 29: Trouble Shooting Guide

    Malfunctioning fill valve First, disconnect brown wire and then the orange wire FILL WITH WATER from VAPOR-LOGIC board terminals 1 & 2 of terminal block J12. Fill valve should open. If fill valve does not open, verify proper 24 volt AC (terminals 20 &...
  • Page 30 VAC (terminals 20 & 21) to fill valve coil. If proper voltage is not present, the control board is defective. Check terminals 1, 2, 3 & 4 on VAPOR-LOGIC control board terminal block J12 for correct voltage: 3 (purple) to 4 (yellow), no water present > 2 VAC.
  • Page 31 TROUBLE SHOOTING GUIDE PROBLEM POSSIBLE CAUSE RECOMMENDED ACTION FILL VALVE DOES Fill valve is stuck Check if fill valve is installed backwards. If yes, NOT CLOSE (con't.) re-pipe. If there is a faulty internal spring or diaphragm in the fill valve, replace valve.
  • Page 32 If there is a broken or weak return spring on drain valve, replace the valve. Check if 24 VAC is present at valve. If so, reset VAPOR-LOGIC control board terminals 18 & 19. HEATER BURNOUT Water level too low Check probes and clean tips if necessary.
  • Page 33 Check for proper wiring. Check humidity transmitters. (4-20 mA output) Adjust set point if VAPOR-LOGIC set point is too low. Excessive outside air volume Verify proper operation of fans, dampers, VAV systems, etc.
  • Page 34 Check for proper VAPOR-LOGIC control settings: RH set point, HL set point, throttling range, cycle rate, delay time settings, PID tuning, etc. Relocate poorly located control components. (See humidity control placement drawing on page 11 for recommendations.)
  • Page 35 Check VAPOR-LOGIC main menu settings and reset if sequence necessary. No power to automatic drain Check if 24 VAC is present at VAPOR-LOGIC control valve board terminals 18 & 19, and drain valve. Defective automatic drain Valve should be replaced if voltage is present at valve valve and it still does not open.

  • Page 36: Replacement Parts

    REPLACEMENT PARTS OM-347 Description Qty. Part No. Description Qty. Part No. Master Control Board 408640 SCR Gasket - 70 amp 308412 Slave Control Board 408640 Contactors - 30 amp 407001-tab Reset Pushbutton (SPDT) 405888 Contactors - 50 amp 407001-tab Digital Display Module "Local" 408650 Relay DPDT 407900-001...

  • Page 37: Glossary

    Integral: The control action that allows the proportional controller to adjust the % RH to the desired set point after the system has stabilized, eliminate droop. Local Digital Display: Digital display / key pad identified as “LOCAL” module to VAPOR-LOGIC, no connector shunt on J6. Main Menu: The main list of items to review or change the control parameters.
  • Page 38 Rate: See Derivative. Reset: See Integral. Remote Digital Display: Digital display / key pad identified as “REMOTE” module to VAPOR-LOGIC board and digital display / key pad. Sample Interval: The specified time in seconds that the input/output values are sampled to evaluate and adjust the control function of P.I.D.

  • Page 39: Maintenance Service Record

    MAINTENANCE SERVICE RECORD DATE INSPECTED PERSONNEL OBSERVATION ACTION PERFORMED...

  • Page 40: Warranty

    TWO YEAR LIMITED WARRANTY DRI-STEEM Humidifier Company (“DRI-STEEM”) warrants to the original user that its products will be free from defects in materials and workmanship for a period of two (2) years after installation or twenty-seven (27) months from the date DRI-STEEM ships such product, whichever date is the earlier.

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