Armstrong World Industries EHU-703, EHU-700 Series, EHU-701 Control Wiring, Control Humidistat

Page 9

CONTROL WIRING

NOTE: Wiring to the low-voltage controls should not run in the same conduits as the power supply wiring because faulty signals could result.

The use of either a metal conduit or shielded wire is required for all the control and / or safety wiring. When using metal conduit, the conduit must extend the entire length of the wire, and the conduit must be grounded at the humidifier cabinet. If the conduit does not extend the entire length of the control wire, the wiring must be shielded and the following guidelines must be used:

1.The wire shields and all unused conductors must be grounded externally to the humidifier cabinet.

2.Ensure a good connection between the shields / conductors and the metal bar of the humidifier cabinet.

Additionally, a supplied ferrite core must be installed around the control wiring between where the wire enters the humidifier cabinet and the low voltage terminal block.

9)CONTROL HUMIDISTAT

The Series EHU-700 is capable of accepting controls signals with the following characteristics:

a.0-10 Vdc Humidistat

(Part No. A18609 and A18610) (H200 or H270 series)

b.1.9-3.9 Vdc Humidistat (Part No. C1471 or C1472)

c.4-20mA, 250 Ω input impedance.

d.0-10 Vdc, 50 kΩ input impedance.

e.0-5 Vdc.

f.0-135 ohms.

g.on/off

Figure 9-1

3"

(75 mm)

5-1/2"

(140 mm)

To adapt the EHU-700 to these different types of control humidistats, jumper BJ4 and BJ5 on the print- ed circuit board (Figure 9-1) must be manually changed and the humidistat must be wired to the appropriate connections of terminals 1, 2 & 17. Refer to Figure 9-1 or the sticker on the inside of the cabinet for proper jumper locations.

Figure 9-2

 

 

 

 

 

 

 

 

 

 

Chart 9-1

 

 

 

 

Pressure Loss in Copper Pipe

 

Feet of equivalent copper pipe for copper

5

 

pipe fittings

 

 

 

 

(40' Equivalent Run)

 

 

 

 

 

 

 

 

 

 

Fitting

1-1/4

1-1/2

2

 

 

 

 

 

 

 

 

 

 

1-1/2"

4

 

 

 

 

 

1-1/4"

 

 

45° Elbow

1.0

2.2

2.8

 

 

 

 

 

 

 

 

3

 

 

 

 

 

 

 

 

 

 

90° Elbow

2.5

4.3

5.5

 

 

 

 

 

 

 

 

 

 

90° Long Elbow

1.5

2.7

3.5

In. WC

 

 

 

 

 

 

 

 

 

 

Tee

5.0

9

12

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

2"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

20

30

40

50

60

70

80

90

100

110 120

 

 

 

 

 

 

 

 

#/Hr. Steam

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9

 

 

 

 

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Image 9
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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 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 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 When Water Conductivity is TOO LOW Water Quality and Treatment for EHU Series HumidifiersGeneral 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 ReplacementModel EHU-701, Single and Three Phase Fill and Drain System RepairDrain System Failure 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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