Manuals / Armstrong World Industries / Household Appliance / Humidifier

Armstrong World Industries EHU-704 manual Electrical Parts, Item Not Shown, Description, Used On

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

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Electrical Parts

Electrical Parts

Item	Part No.	Description	Used On
46	C2059	Display PC Board	701,703,704
47A	A22925	Control PC Board Less Current Module	701
47B	A22926	Control PC Board Less Current Module	703,704
48A	B2895-7	CM-7 Current Module	701,703,704
48B	B2895-12	CM-12 Current Module	701,703,704
48C	B2895-14	CM-14 Current Module	701,703,704
48D	B2895-16	CM-16 Current Module	701,703,704
48E	B2895-20	CM-20 Current Module	701,703,704
48F	B2895-24	CM-24 Current Module	701,703,704
48G	B2895-32	CM-32 Current Module	701,703,704
48H	B2895-40	CM-40Current Module	701,703,704
48I	B2895-48	CM-48 Current Module	701,703,704
49	B1992B	Current Transformer	701,703,704
50	B2721	Elec Contactor 50 Amp	701,703,704
51	A10094	Fuse, 3 Amp, Set of 2	701,703,704
52A	C1833	Power Transformer (120v)	701,703,704
52B	C1833F	Power Transformer (208v)	701,703,704
52C	C1833G	Power Transformer (240v)	701,703,704
52D	C1833C	Power Transformer (277v)	701,703,704
52E	C1833H-1	Power Transformer (346v)	701,703,704
52F	C1833D	Power Transformer (380v)	701,703,704
52G	C1833H-2	Power Transformer (415v)	701,703,704
52H	C1833B	Power Transformer (480v)	701,703,704
52I	C1833A	Power Transformer (600v)	701,703,704
53	B2857	Cable Assy-Hex Display	701,703,704
54	B2856	Cable Assy-LED Display	701,703,704
55A	D348	Wire Harness	701
55B	D296	Wire Harness	703,704
56A	B2419	Tank Power Lead w/Terminal 19-1/2"	701
56B	B2853-13	Tank Power Lead w/Terminal 36"	703,704
56C	B2853-14	Tank Power Lead w/Terminal 50"	704
57A	B2334-11	Contactor Power Lead 12-1/2"	701
57B	B2854-1	Contactor Power Lead 5-1/2"	703,704
*58A	B2925-1	Tank Jumper Lead 10" 1 Ph	703,704
58B	B2925-2	Tank Jumper Lead 14-1/2" 3 Ph	703,704
*59	B2718-1	Wire Ext. for Contactor #2	704
*60	B2718-3	Wire Ext. for Drain Valve #2	704
61	A8649	Fuse Block	701,703,704
62	B2414-3	Quick Disconnect 3 Terminal Block	701,703,704

*Item Not Shown

See Drawings on Page 28

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Image 27

Armstrong World Industries EHU-704, EHU-700 Series, EHU-703, EHU-701 Electrical Parts, Item Not Shown, Description, Used On

Contents

Installation and Maintenance Series EHU-700 HumidifiersPlease Read And Save These Instructions DANGER ELECTRICAL SHOCK HAZARD HIGH VOLTAGES EXIST INSIDE THE HUMIDIFIERMETAL TOOLS AWAY FROM THESE AREAS INSTALLATION TABLE OF CONTENTSSECTION 1 PREPARATION AND INSTALLATION PRE-INSTALLATIONCHECK LOCAL CODES PRE-INSTALLATIONin locations where unusual instances of 1 CHECK SHIPMENTWater TotalModel unit IMPORTANT Please observe the following INSTALLATION5 ELECTRICAL SERVICE WIRING 4 MOUNTING THE HUMIDIFIER7 CONNECT DRAIN 6 WATER FILL SUPPLYhumidifier Figure 8-1. Pipe size may 9 CONTROL HUMIDISTAT CONTROL WIRING6 - 10 Ft Wall Mounted Control Humidistat10 HIGH LIMIT DUCT HUMIDISTAT 11 AIRFLOW SWITCHNOTE LIMIT SWITCHES HIGH LIMIT AND AIRFLOW SWITCHES OPEN ON FAULT Duct Mounted Control HumidistatBoard 12 AUDIBLE ALARMTANK OFF LIGHT MODE BUTTON, INDICATOR, and DISPLAYINSTRUMENT PANEL FILL LIGHT DRAIN LIGHTSTART-UP PROCEDURE FOR ARMSTRONG SERIES EHU-700 HUMIDIFIERS BEFORE TURNING ON THE POWERTURN ON POWER AT THE CIRCUIT BREAKER b The unit will shut down, lighting the Tank Off light 9 Press the Drain switch. Verify that the unit is draining freely7 Let the unit continue to fill and allow the water to boil a The stat demand reading will decrease to zero17 Close and lock the doors, and store the key away from the unit 16 Turn power off, if humidification is not neededTROUBLESHOOTING GUIDE FIER BECAUSE THIS SWITCH DISCONNECTS THE STEAM GENERATOR TANK ONLYPRINCIPLE OF OPERATION - AN OVERVIEW OPERATIONAL GUIDELINES Tank Contactor OperationMonitoring Stat Demand Automatic Drain Operation Monitoring % PowerManual Drain Mode Monitoring CurrentC00 NORMAL OPERATION C01 HIGH WATER EHU-700 DIAGNOSTICSDIAGNOSTIC DISPLAY MESSAGES C02 TANK NEEDS CLEANINGC07 OVERCURRENT FAILURE C04 HIGH LIMIT CIRCUITC05 DRAIN SYSTEM FAILURE C06 FILL SYSTEM FAILUREC09 I/O DIAGNOSTICS GENERAL How does this affect maintenance?WHEN WATER CONDUCTIVITY IS TOO LOW Indicators WATER QUALITY AND TREATMENT FOR EHU SERIES HUMIDIFIERSRemedies WHEN WATER CONDUCTIVITY IS TOO HIGH IndicatorsResults RemedyDescription EHU-701, -703, -704 Series Electronic Steam Humidifier Repair PartsSteam Generators Complete Steam Generator PartsSee Drawings on Page Valves and Mechanical PartsDescription Used OnUsed On Electrical PartsItem Not Shown DescriptionFigure 28-2. EHU-700 Steam Generator Repair Parts List Figure 28-1. EHU-700 Parts ListTank Cleaning MAINTENANCERECOMMENDED MAINTENANCE SCHEDULE STEAM GENERATOR MAINTENANCE GeneralTANK 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 REPLACEMENTMODEL EHU-701, SINGLE AND THREE PHASE FILL AND DRAIN SYSTEM REPAIR GeneralDrain System Failure Fill System Failure SENSOR FAILURE PROTECTION AUTOCAL PROCEDURESPECIFICATIONS HUMIDISTAT DATASENSOR OUTPUT DIMENSIONSTABLE 5 SENSOR CHARACTERISTICS Voltage between black and white wire, terminals #6 and #7AIR SUPPLY HIGH LIMIT HUMIDITY SENSOR HUMIDITY SET POINT RESET BY OUTSIDE TEMPERATUREHumidistat model number H270-69-13-10-31 APPLICATION EXAMPLEDescription Dimensional InformationLimited Warranty and Remedy Dimensions