Armstrong World Industries EHU-703, EHU-701 manual Month to 1 Year, Steam Generator Maintenance

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MAINTENANCE

RECOMMENDED MAINTENANCE SCHEDULE

1 TO 2 DAYS AFTER START UP

1)Check unit operation.

2)Look in drain pan for leaks.

3)Check steam piping for leaks.

4)Observe duct low points for signs of poor humidity distribution.

5)Be sure unit is draining freely by pushing the manual drain button (the manual tank off button should not be depressed).

1 MONTH TO 1 YEAR

1)

Repeat the 5 steps outlined above.

 

2)

Clean, repair, or replace steam generator.

STEAM GENERATOR MAINTENANCE

General:

The steam generator is basically the only part of the EHU that requires regular maintenance. This maintenance may include cleaning or replacing the tank itself or the electrodes. We recommend sub- stituting a spare generator in order to minimize downtime and labor requirements. The replaced gener- ator may then be serviced when it is convenient.

Tank Cleaning:

As the water in the steam generator boils away, the minerals in that water come out of suspension and are deposited on the walls of the tank and on the electrodes. This process leaves the tank walls coat- ed with a white or light brown colored mineral buildup. This buildup may be anywhere from soft and chalky to rock hard. The automatic drain cycle will minimize mineral buildup but, eventually, the tank will need cleaning.

Tank cleaning is indicated when:

a)The unit has been in service for a period of time, a solids buildup is visible through the tank walls, and the "normal" water level in the tank is rising, or;

b)The tank cleaning message (C02) is displayed.

TO CLEAN THE TANK, PLEASE REFER TO THE "TANK REMOVAL AND REPLACEMENT" AND THE "STEAM GENERATOR CHEMICAL CLEANING PROCESS" SECTIONS OF THIS MANUAL. (PAGE 30)

Tank Replacement:

Tank replacement is indicated if the tank body becomes deformed in any way, as this could cause leakage around the o-ring.

TO REPLACE THE TANK, PLEASE REFER TO THE "TANK REMOVAL AND REPLACEMENT" SECTION OF THIS MANUAL. (Page 30)

Electrode Replacement:

Electrode disintegration generally starts due to high conductivity water being present in the steam generator. Electrode disintegration sometimes occurs as a result of a combination of the following factors:

a)High voltage (especially 480 and 600 volts);

b)Hard water (in excess of 20 grains/gal.);

c)Any unit with a malfunctioning drain system;

d)Softened water.

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Contents Installation and Maintenance Metal Tools Away from These Areas Table of Contents Check Shipment PRE-INSTALLATIONCheck Local Codes Site SelectionWater Total Electrical Service Wiring InstallationMounting the Humidifier Important Please observe the followingConnect Drain Water Fill SupplyPressure in duct is high, see Figure Control Humidistat Control WiringWall Mounted Control Humidistat 10 FtHigh Limit Duct Humidistat Airflow SwitchDuct Mounted Control Humidistat Generator a Audible AlarmInstrument Panel Turn on Power AT the Circuit Breaker START-UP Procedure for Armstrong Series EHU-700 HumidifiersBefore Turning on the Power Page Page Troubleshooting Guide Monitoring Stat Demand Operational GuidelinesTank Contactor Operation 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 General When Water Conductivity is TOO LOWWater Quality and Treatment for EHU Series Humidifiers Results When Water Conductivity is TOO HighRemedy RemediesSteam Generator Parts Valves and Mechanical Parts Electrical Parts EHU-700 Parts List Recommended Maintenance Schedule To 2 Days After Start UP MaintenanceSteam Generator Maintenance Month to 1 YearTank 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 ReplacementDrain System Failure Model EHU-701, Single and Three PhaseFill and Drain System Repair Fill System Failure Specifications Autocal ProcedureHumidistat Data Sensor Failure ProtectionSensor Characteristics DimensionsAIR Supply High Limit Humidity Sensor Humidity SET Point Reset by Outside TemperatureHumidistat model number H270-69-13-10-31 Application ExampleDimensional Information

EHU-701, EHU-700 Series, EHU-704, EHU-703 specifications

Armstrong World Industries has long been a leader in the ceiling and wall solutions industry, and its EHU-700 Series exemplifies the commitment to innovation and quality. The EHU-700 Series, which includes models such as the EHU-703, EHU-704, and EHU-701, is designed for a variety of commercial applications, combining aesthetic appeal with superior performance characteristics.

One of the key features of the EHU-700 Series is its exceptional acoustic control. The panels are crafted using advanced sound-absorbing materials that effectively reduce noise levels in busy environments. This makes them ideal for areas such as offices, schools, and healthcare facilities, where quietness can significantly enhance productivity and comfort. The EHU-700 Series has been rigorously tested and certified to meet stringent industry standards, ensuring its effectiveness in noise reduction.

Additionally, these ceiling panels are designed with durability in mind. Made from high-quality components, the EHU-700 Series is resistant to moisture and staining, making them suitable for spaces exposed to humidity, such as kitchens and restrooms. This resilience ensures that the panels maintain their aesthetic appeal over time, reducing maintenance costs for facility managers.

The EHU-700 Series also incorporates Armstrong's innovative technologies to enhance ease of installation and flexibility. The panels feature a lightweight design, allowing for straightforward handling and installation. Compatibility with various grid systems ensures that the EHU-700 Series can be easily integrated into existing architectural designs, providing a seamless finish.

Another significant aspect of the EHU-700 Series is its commitment to sustainability. Armstrong World Industries emphasizes eco-friendly manufacturing processes and materials, allowing architects and builders to achieve green building certifications, such as LEED. The use of recyclable materials in the panel composition reflects a commitment to reducing the environmental footprint.

In summary, the EHU-700 Series, including the EHU-703, EHU-704, and EHU-701 models, showcases Armstrong World Industries' dedication to quality and innovation. With unparalleled acoustic performance, durability, installation convenience, and sustainability, these ceiling panels are ideal for a wide array of commercial environments, proving to be a valuable investment for modern architectural needs. Their combination of functionality and design ensures that they meet the demands of today's dynamic spaces.
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