Manuals / Armstrong World Industries / Household Appliance / Humidifier

Armstrong World Industries EHU-703 Steam Generators Complete, Steam Generator Parts, Description

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

1 40

Download 40 pages 20.75 Kb

Page 25

EHU-701, -703, -704 Series

EHU-701, -703, -704 Series

Electronic Steam Humidifier

Repair Parts

Steam Generators Complete

	Item	Part No.		Description	Used On
	*1A	D4417	1	Ph Low Voltage	701
	*1A	D4417	120,208,240,277 Volts		701
			120,208,240,277 Volts
	*1B	D4418	1	Ph High Voltage w/Barrier	701
	*1B	D4418	380,480,600 Volts		701
			380,480,600 Volts
	*2A	D4415	3	Ph Low Voltage (208, 240, 277 volts)	701
	*2B	D4416	3	Ph High Voltage w/Barrier (380, 480, 600 volts)	701
	3A	D262A	3 Ph/1 Ph Low Voltage (120, 208, 240, 277 volts)		703,704
	3B	D262	3	Ph High Voltage w/Barrier (380, 480, 600 volts)	703,704

Note: A replacement generator comes with a spare drain adaptor "O" Ring.

Steam Generator Parts

	Item	Part No.	Description	Used On
	† *4A	D4422	Tank Assembly Less Electrodes - 1 Phase	701
	† *4B	D4423	Tank Assembly Less Electrodes - 3 Phase	701
	† 6	D263	Steam Generator Bottom Half-Less Drain Screen	703,704
	† 6	B3968	Steam Generator Top Half- Holes Drilled	703,704
	*7A	B3038	Electrode Replacement Assembly 1 Ph	701
	*7A	B3038	High & Low Voltage	701
			High & Low Voltage
	*7B	A10077	Electrode Replacement Assembly 3 Ph	701
	8	A9745	Electrode Replacement Set (Includes 6 ea. electrodes,	703,704
	8	A9745	O-Rings, 1/4" Nut & 1/2" Nut) 1 Ph/3 Ph	703,704
			O-Rings, 1/4" Nut & 1/2" Nut) 1 Ph/3 Ph
	*9A	A9742	Drain Screen for Low Voltage (120, 208, 240, 277)	701
	*9B	B2413D	Drain Screen/Barrier Assembly For High Voltage 1 Ph	701
	*9C	C1965	Drain Screen/Barrier Assembly For High Voltage 3 Ph	701
	10	C2053	Drain Screen	703,704
	11	A9746	Tank Barrier Assembly	703,704
	12A	A21374	O-Ring for Steam Generator	701
	12B	A21375	O-Ring for Steam Generator	703,704
	*13	C1839	V Band Tank Clamp	701
	14	B2822	Tank Retainer Clip	703,704

*Item Not Shown.

†These parts are furnished as a convenience to our customers. Part dimensions may change in service. Armstrong cannot guarantee that new parts will fit your used parts.

See Drawings on Page 28

25

Image 25

Armstrong World Industries EHU-703 manual EHU-701, -703, -704 Series Electronic Steam Humidifier Repair Parts, Description

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