Intermatic MIL72ASTUZH-24 24 Hr. Electromechanical Time Control User Manual

1. Introduction

This manual provides detailed instructions for the installation, operation, and maintenance of the Intermatic MIL72ASTUZH-24 24 Hr. Electromechanical Time Control. This device is designed for surface mounting and features a synchronous SPDT switch with a 21 Amp capacity at 24 Volts. Please read this manual thoroughly before installation and operation to ensure proper function and safety.

Image 1.1: Front view of the Intermatic MIL72ASTUZH-24 Electromechanical Time Control. The device features a circular dial with hour markings (AM/PM) and numerous white trippers around its circumference, indicating its 24-hour timing capability. A clear plastic cover protects the dial, and the main body is white plastic, designed for surface mounting.

2. Safety Information

Always observe the following safety precautions to prevent personal injury or damage to the device:

• Disconnect power at the circuit breaker or fuse box before installing or servicing the timer.
• Installation should be performed by a qualified electrician in accordance with all national and local electrical codes.
• Do not exceed the specified voltage and amperage ratings (24 Volt, 21 Amps).
• Ensure all wiring connections are secure and properly insulated.
• This device is intended for indoor use unless otherwise specified for outdoor enclosures.

3. Product Overview

The MIL72ASTUZH-24 is an electromechanical time control designed for precise 24-hour scheduling. Key features include:

• 24-Hour Dial: Provides a full day's timing cycle.
• Captive Trippers: Integrated trippers for setting ON/OFF times, eliminating the risk of losing them.
• SPDT Switch: Single-Pole Double-Throw switch type for versatile control applications.
• Synchronous Motor: Ensures accurate timekeeping.
• Surface Mounting: Designed for easy installation on flat surfaces or DIN rail.

4. Setup and Installation

4.1 Mounting

1. Select a suitable mounting location that is clean, dry, and free from excessive vibration or temperature fluctuations.
2. For surface mounting, use appropriate screws to secure the timer housing to the desired surface. Ensure the timer is level.
3. Alternatively, the unit can be mounted on a DIN rail if applicable.

4.2 Wiring

Refer to the wiring diagram provided on the unit or in the packaging for specific connections. General steps include:

1. Ensure power is OFF at the main circuit breaker.
2. Connect the incoming 24 Volt power supply to the designated terminals.
3. Connect the load (device to be controlled) to the appropriate SPDT switch terminals (Common, Normally Open, Normally Closed) as required by your application.
4. Verify all connections are tight and correct before restoring power.

5. Operating Instructions

5.1 Setting Current Time

• Rotate the dial clockwise until the current time aligns with the time indicator arrow.
• Ensure to distinguish between AM and PM hours on the 24-hour dial.

5.2 Setting ON/OFF Times

• The dial has captive trippers around its circumference. Each tripper represents a specific time interval.
• To set an ON time, push the corresponding tripper segment outwards.
• To set an OFF time, push the corresponding tripper segment inwards.
• Multiple ON/OFF cycles can be set within a 24-hour period.

5.3 Manual Override

Some models may include a manual override switch. Consult the specific product labeling for its presence and operation. This typically allows you to temporarily turn the controlled device ON or OFF, overriding the programmed schedule until the next programmed event.

6. Maintenance

The Intermatic MIL72ASTUZH-24 is designed for long-term, reliable operation with minimal maintenance. Follow these guidelines:

• Cleaning: Periodically wipe the exterior of the timer with a soft, dry cloth. Do not use abrasive cleaners or solvents.
• Inspection: Annually inspect wiring connections for tightness and signs of wear or damage.
• No User Serviceable Parts: Do not attempt to open or repair the internal components of the timer. Refer all servicing to qualified personnel.

7. Troubleshooting

8. Specifications

9. Warranty and Support

9.1 Warranty Information

Intermatic products are typically covered by a limited warranty against defects in material and workmanship. For specific warranty terms and duration, please refer to the warranty card included with your product or visit the official Intermatic website. Keep your purchase receipt as proof of purchase.

9.2 Customer Support

For technical assistance, troubleshooting beyond this manual, or warranty claims, please contact Intermatic Customer Support. Contact information can typically be found on the product packaging or the official Intermatic website.

Online Resources: www.intermatic.com