Manuals / Armstrong World Industries / Household Appliance / Humidifier

Armstrong World Industries EHU-703, EHU-700 Series, EHU-701 manual Installation and Maintenance

Models: EHU-701 EHU-700 Series EHU-704 EHU-703

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Bulletin 527-G

Installation and Maintenance

Series EHU-700 Humidifiers

Please Read And Save These Instructions

The Armstrong Series EHU-700 humidifier is an electronically controlled, non-pressurized steam-generating humidifier, with its vapor discharged into a duct of an air-handling system or through a fan package. The Armstrong Series EHU-700 consists of three models: The EHU-701, 703 and 704. The maximum capacity of the series is 240 Ibs/hr.

To allow the Series EHU-700 humidifier to function to its full capability, be certain to install it in accordance with the following Armstrong recommendations. For further assistance, please contact your local Armstrong representative for the video tape, "Armstrong Series EHU-700 Humidifiers: Installation, Operation and Maintenance".

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Armstrong World Industries EHU-703, EHU-700 Series, EHU-701 manual Installation and Maintenance, Series EHU-700 Humidifiers

Contents

Series EHU-700 Humidifiers Installation and MaintenancePlease Read And Save These Instructions HIGH VOLTAGES EXIST INSIDE THE HUMIDIFIER DANGER ELECTRICAL SHOCK HAZARDMETAL TOOLS AWAY FROM THESE AREAS SECTION 1 PREPARATION AND INSTALLATION TABLE OF CONTENTSPRE-INSTALLATION INSTALLATIONin locations where unusual instances of PRE-INSTALLATION1 CHECK SHIPMENT CHECK LOCAL CODESTotal WaterModel unit 5 ELECTRICAL SERVICE WIRING INSTALLATION4 MOUNTING THE HUMIDIFIER IMPORTANT Please observe the following7 CONNECT DRAIN 6 WATER FILL SUPPLYhumidifier Figure 8-1. Pipe size may 9 CONTROL HUMIDISTAT CONTROL WIRING6 - 10 Ft Wall Mounted Control HumidistatNOTE LIMIT SWITCHES HIGH LIMIT AND AIRFLOW SWITCHES OPEN ON FAULT 11 AIRFLOW SWITCHDuct Mounted Control Humidistat 10 HIGH LIMIT DUCT HUMIDISTATBoard 12 AUDIBLE ALARMINSTRUMENT PANEL MODE BUTTON, INDICATOR, and DISPLAYFILL LIGHT DRAIN LIGHT TANK OFF LIGHTBEFORE TURNING ON THE POWER START-UP PROCEDURE FOR ARMSTRONG SERIES EHU-700 HUMIDIFIERSTURN ON POWER AT THE CIRCUIT BREAKER 7 Let the unit continue to fill and allow the water to boil 9 Press the Drain switch. Verify that the unit is draining freelya The stat demand reading will decrease to zero b The unit will shut down, lighting the Tank Off light17 Close and lock the doors, and store the key away from the unit 16 Turn power off, if humidification is not neededFIER BECAUSE THIS SWITCH DISCONNECTS THE STEAM GENERATOR TANK ONLY TROUBLESHOOTING GUIDEPRINCIPLE OF OPERATION - AN OVERVIEW Tank Contactor Operation OPERATIONAL GUIDELINESMonitoring Stat Demand Manual Drain Mode Monitoring % PowerMonitoring Current Automatic Drain OperationDIAGNOSTIC DISPLAY MESSAGES EHU-700 DIAGNOSTICSC02 TANK NEEDS CLEANING C00 NORMAL OPERATION C01 HIGH WATERC05 DRAIN SYSTEM FAILURE C04 HIGH LIMIT CIRCUITC06 FILL SYSTEM FAILURE C07 OVERCURRENT FAILUREC09 I/O DIAGNOSTICS WHEN WATER CONDUCTIVITY IS TOO LOW Indicators How does this affect maintenance?WATER QUALITY AND TREATMENT FOR EHU SERIES HUMIDIFIERS GENERALResults WHEN WATER CONDUCTIVITY IS TOO HIGH IndicatorsRemedy RemediesSteam Generators Complete EHU-701, -703, -704 Series Electronic Steam Humidifier Repair PartsSteam Generator Parts DescriptionDescription Valves and Mechanical PartsUsed On See Drawings on PageItem Not Shown Electrical PartsDescription Used OnFigure 28-2. EHU-700 Steam Generator Repair Parts List Figure 28-1. EHU-700 Parts ListRECOMMENDED MAINTENANCE SCHEDULE MAINTENANCESTEAM GENERATOR MAINTENANCE General Tank CleaningTANK REMOVAL AND REPLACEMENT - ALL MODELS STEAM GENERATOR CHEMICAL CLEANING PROCEDURE Page MODELS EHU-703 AND 704, SINGLE AND THREE PHASE TANK DISASSEMBLY, CLEANING, AND ELECTRODE REPLACEMENTFILL AND DRAIN SYSTEM REPAIR General MODEL EHU-701, SINGLE AND THREE PHASEDrain System Failure Fill System Failure SPECIFICATIONS AUTOCAL PROCEDUREHUMIDISTAT DATA SENSOR FAILURE PROTECTIONTABLE 5 SENSOR CHARACTERISTICS DIMENSIONSVoltage between black and white wire, terminals #6 and #7 SENSOR OUTPUTAIR SUPPLY HIGH LIMIT HUMIDITY SENSOR HUMIDITY SET POINT RESET BY OUTSIDE TEMPERATUREHumidistat model number H270-69-13-10-31 APPLICATION EXAMPLELimited Warranty and Remedy Dimensional InformationDimensions Description