Armstrong World Industries EHU-700 Series, EHU-703, EHU-701, EHU-704 Audible Alarm, Generator a

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Figure 12-1

 

 

 

 

 

 

 

 

 

24 VAC

Steam

 

 

 

Drain Valve A

Generator A

 

 

 

 

High Water

 

 

 

 

 

Switch A

 

 

24 VAC

Panel Switches

 

Low-Voltage

Fill Valve

Drain

Tank

Mode

 

On/Off

On/Off

Select

 

 

 

Low-Energy

 

 

 

 

 

Controls

 

 

 

 

 

Main Control

 

 

 

 

 

Humidistat

 

Micro Controller

 

 

 

Current

 

 

Printed Circuit

Transformer

High Limit*

 

 

 

 

Board

 

Humidistat

 

 

 

Air Flow*

 

 

 

 

 

Switch

 

 

 

 

 

 

 

 

 

 

24 VAC

N.O. Alarm

 

 

 

 

Contactor

Relay

 

LED

 

 

 

 

 

 

Three-Digit

 

 

 

Display

 

*Must be closed to run

 

Numerical Display

 

 

 

 

 

 

Side 1

 

 

Side 2

 

 

24 V Secondary

 

 

 

 

Power Transformer

 

 

 

 

 

 

 

 

High Voltage

 

 

 

 

 

Terminals

12) AUDIBLE ALARM

There is an external alarm circuit provided. When an alarm condition is detected in the diagnostic routines, a relay contact closes allowing activation of an external Class II device connected between terminals 27 & 28. This circuit is rated to 1 amp.

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Contents Installation and Maintenance Metal Tools Away from These Areas Table of Contents PRE-INSTALLATION Check ShipmentCheck Local Codes Site SelectionWater Total Installation Electrical Service WiringMounting the Humidifier 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 % Power Manual Drain ModeMonitoring Current Automatic Drain OperationEHU-700 Diagnostics Diagnostic Display MessagesC02 Tank Needs Cleaning C00 Normal Operation C01 High WaterC04 High Limit Circuit C05 Drain System FailureC06 Fill System Failure C07 Overcurrent FailureC09 I/O Diagnostics When Water Conductivity is TOO LOW Water Quality and Treatment for EHU Series HumidifiersGeneral When Water Conductivity is TOO High ResultsRemedy RemediesSteam Generator Parts Valves and Mechanical Parts Electrical Parts EHU-700 Parts List Maintenance Recommended Maintenance Schedule To 2 Days After Start UPSteam Generator Maintenance 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 Autocal Procedure SpecificationsHumidistat Data 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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