Armstrong World Industries EHU-701, EHU-700 Series manual Tank Removal and Replacement ALL Models

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If the electrodes begin to disintegrate, the tank may turn black or red, and arcing or flashing may be visible inside the tank while it is operating. IF YOU NOTICE EXCESSIVE ARCING, SHUT THE UNIT OFF AND CALL THE FACTORY BEFORE RE-STARTING UNIT.

To replace the electrodes, please refer to the "Tank Disassembly and Electrode Replacement" Section of this manual. (Page 33)

RECOMMENDED PROCEDURE FOR STEAM GENERATOR TANK AND ELECTRODE REMOVAL, CLEANING, REPAIR AND REPLACEMENT

TANK REMOVAL AND REPLACEMENT - ALL MODELS

1)Turn steam generator tank off by pressing tank off button.

2)Drain the tank by pressing the drain button. It may take five minutes for a full tank to completely drain.

3)Once the tank is completely empty, turn off the power at the main disconnect or breaker.

4)Disconnect the steam hose from the top of the steam generator tank by loosening the hose clamp with a screwdriver or 5/16" nutdriver. BE CAREFUL! The tank may still be hot to the touch, and some steam may still be condensing in the tank.

5)Disconnect the power leads at the steam generator with a 7/16" wrench (three leads for 3-phase units, two leads for single phase). See wiring diagram, Figure 12-1, for more details.

6)Remove the tank from the cabinet by lifting it out of the drain adaptor. BE CAREFUL! The tank may still contain hot steam or condensate.

7)It is preferable that you replace the tank with a new or rebuilt unit and take the current tank to the shop for servicing.

8)Install the tank into the EHU by lowering it into the drain adaptor. A small amount of high tempera- ture grease or silicone lubricant may be used on the drain adaptor o-ring to help it seal properly. After a couple of tank replacements the o-ring should de replaced as well.

9)Connect power leads and, on EHU-703 and 704, the loose end of the jumper wires to electrode studs using a 7/16" wrench (three leads for 3-phase units, two for single phase). Refer to the wiring diagram in your unit for specific information.

10)Connect the steam hose to the top of the steam generator with the hose clamp.

11)Check all wiring connections at the main power, contactor, and control voltage terminal blocks (Figure 14-1), as well as on the generator itself. Energize the circuit breaker or main disconnect. Refer to Start-up Section if you encounter any problems when restarting the unit.

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Contents Installation and Maintenance Metal Tools Away from These Areas Table of Contents Check Local Codes PRE-INSTALLATIONCheck Shipment Site SelectionWater Total Mounting the Humidifier InstallationElectrical Service Wiring Important Please observe the followingWater Fill Supply Connect DrainPressure in duct is high, see Figure Control Wiring Control Humidistat10 Ft Wall Mounted Control HumidistatAirflow Switch Duct Mounted Control HumidistatHigh Limit Duct Humidistat Audible Alarm Generator aInstrument Panel START-UP Procedure for Armstrong Series EHU-700 Humidifiers Before Turning on the PowerTurn on Power AT the Circuit Breaker Page Page Troubleshooting Guide Operational Guidelines Tank Contactor OperationMonitoring Stat Demand Monitoring Current Monitoring % PowerManual Drain Mode Automatic Drain OperationC02 Tank Needs Cleaning EHU-700 DiagnosticsDiagnostic Display Messages C00 Normal Operation C01 High WaterC06 Fill System Failure C04 High Limit CircuitC05 Drain System Failure C07 Overcurrent FailureC09 I/O Diagnostics When Water Conductivity is TOO LOW Water Quality and Treatment for EHU Series HumidifiersGeneral Remedy When Water Conductivity is TOO HighResults RemediesSteam Generator Parts Valves and Mechanical Parts Electrical Parts EHU-700 Parts List Steam Generator Maintenance MaintenanceRecommended Maintenance Schedule To 2 Days After Start UP Month to 1 YearTank Removal and Replacement ALL Models Steam Generator Chemical Cleaning Procedure Page Tank DISASSEMBLY, CLEANING, and Electrode Replacement Models EHU-703 and 704, Single and Three PhaseModel EHU-701, Single and Three Phase Fill and Drain System RepairDrain System Failure Fill System Failure Humidistat Data Autocal ProcedureSpecifications Sensor Failure ProtectionDimensions Sensor CharacteristicsHumidity SET Point Reset by Outside Temperature AIR Supply High Limit Humidity SensorApplication Example Humidistat model number H270-69-13-10-31Dimensional 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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