Armstrong World Industries EHU-704, EHU-700 Series, EHU-703, EHU-701 manual

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If the stat demand display is greater than 35% and the unit does not begin filling, press the mode select button three times and the diagnostic mode indicator will light. Note the diagnostic message and refer to the diagnostics information in the troubleshooting section of this manual (page 20).

c)If the stat demand is less than 35%, force a 100% humidity demand by setting humidistat dial to 95% RH. Alternately, a 100% demand can be simulated by setting BJ4 jumper to position 3-4 (on/off), set BJ5 to position 1+2 (5 VDC) and installing a jumper between terminals 17+1 of the low voltage terminal block inside humidifier.

7)Let the unit continue to fill and allow the water to boil.

a)If the water level reaches within 4" of the Steam Generator Tank top, the High Water Float Switch will block the fill and illuminate the High Water light momentarily. This is normal on relatively pure water. Pressing the mode button to check the diagnostic display will result in an indication of C01. To complete the start-up testing in this instance, push the Drain switch to drain 1/2 of the tank. Next, turn off power at the breaker or safety switch and add one pinch (1/2 teaspoon) of Epsom salts to the Fill Cup (See Part #25 on Page 28). This should allow the water to boil by increasing the water's conductivity. (See "Water Quality and Treatment for EHU Humidifiers" in the troubleshooting section on page 23.) Reapply power to energize the humidifier.

8)On typical beginning fill, after the fill stops, press the mode button until percentage of maximum power is indicated. The numerical display should read a few points above 40%.

9)Press the Drain switch. Verify that the unit is draining freely.

10)Inspect the steam outlet piping. Verify that there are no un-trapped low spots. Also verify that the piping is insulated and properly sloped (See Step 8 on Page 7).

11)If the Dispersion Tube is equipped with a drain fitting, verify that is working.

12)Verify operation of high limit humidistat and or air proving switch, if used.

a)If high limit is used, turn dial to minimum setting, 10%. Display of unit should read CO4 and unit should stop steam production. Turn humidistat dial to maximum of 90% and unit should return to normal operation.

b)If pressure switch is being used, verify airflow condition in duct or air handler.

- If air flow is present, unit should be in normal operation. Disconnect wire from terminal

15 at humidifier. Display should show CO3, and unit will stop operation. Reconnect wire to terminal 15, and unit should return to normal operation.

- If Air Flow is not present in Duct or Air Handler, unit should be sitting IDLE and Display should be showing CO3. Turn fan on and verify duct or Air handler now has airflow present. Unit should return to normal operation.

13)While humidification is being demanded, turn humidistat dial down to near zero. The following should happen:

a)The stat demand reading will decrease to zero.

b)The unit will shut down, lighting the Tank Off light.

14)Turn humidistat dial to the desired value.

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Contents Installation and Maintenance Metal Tools Away from These Areas Table of Contents Site Selection PRE-INSTALLATIONCheck Shipment Check Local CodesWater Total Important Please observe the following InstallationElectrical Service Wiring Mounting the HumidifierConnect Drain Water Fill SupplyPressure in duct is high, see Figure Control Humidistat Control WiringWall Mounted Control Humidistat 10 FtAirflow Switch Duct Mounted Control HumidistatHigh Limit Duct Humidistat Generator a Audible AlarmInstrument 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 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 When Water Conductivity is TOO LOW Water Quality and Treatment for EHU Series HumidifiersGeneral Remedies When Water Conductivity is TOO HighResults RemedySteam Generator Parts Valves and Mechanical Parts Electrical Parts EHU-700 Parts List Month to 1 Year MaintenanceRecommended Maintenance Schedule To 2 Days After Start UP Steam Generator MaintenanceTank 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 RepairDrain System Failure Fill System Failure Sensor Failure Protection Autocal ProcedureSpecifications Humidistat DataSensor 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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