Intermatic ET1705C 7-Day Electronic Time Switch User Manual

1. Introduction

This manual provides comprehensive instructions for the installation, setup, operation, and maintenance of the Intermatic ET1705C 7-Day Electronic Time Switch. The ET1705C is designed for precise control of electrical loads, offering flexible programming with up to 28 events and automatic Daylight Saving Time adjustment. Please read this manual thoroughly before installation and operation to ensure safe and correct usage.

2. Safety Information

WARNING: Risk of Electrical Shock. Disconnect power at the circuit breaker or fuse box before installing or servicing this device. Installation should be performed by a qualified electrician in accordance with all national and local electrical codes.

• Always ensure the power supply is disconnected before working on electrical connections.
• Use 10-16 gauge copper conductors rated for at least 75°C (167°F) for all connections.
• Do not remove the insulator.
• This device is intended for indoor use or in an appropriate outdoor enclosure.

Figure 1: Intermatic ET1705C Time Switch with cover open, displaying internal components, control buttons, LCD screen, and safety warnings. Note the voltage selector and wiring terminals.

3. Package Contents

Verify that all components are present before beginning installation:

• Intermatic ET1705C 7-Day Electronic Time Switch
• Instruction Manual (this document)
• Two (2) AAA Alkaline Batteries (pre-installed or included)

4. Product Overview and Features

The Intermatic ET1705C is an advanced electronic time switch designed for reliable and precise control of various electrical applications. Key features include:

• Voltage Flexibility: Features a selector switch for easy voltage adjustment between 120-277 VAC, 50/60 Hz, ensuring compatibility with a wide range of electrical systems.
• Extensive Programming: Allows for up to 28 events (14 ON/14 OFF per channel), providing versatile scheduling options for interior/exterior lighting, pumps, and motor control.
• Precision Timing: Offers to-the-minute accuracy for all programmed events, ensuring reliable performance.
• Flexible Override Options: Provides both temporary and permanent manual override capabilities.
• Automatic Daylight Saving Time Adjustment: Automatically adjusts for Daylight Saving Time changes, eliminating manual intervention.
• Battery Backup: Two industrial grade "AAA" Alkaline batteries provide a minimum of 3 years program and timing protection during power outages.

Figure 2: Front view of the Intermatic ET1705C Time Switch with its protective cover closed, showing the gray enclosure.

5. Installation

Important: Installation must be performed by a qualified electrician and comply with all applicable electrical codes. Ensure power is disconnected before proceeding.

1. Mounting: Securely mount the time switch enclosure to a wall or suitable surface using appropriate fasteners. Ensure the location is protected from moisture if not rated for outdoor exposure.
2. Voltage Selection: Open the front cover. Locate the voltage selector switch inside the unit. Before connecting power, set the selector to the correct voltage (120V, 208V, 240V, or 277V) matching your electrical system. Refer to Figure 3 for the location of the voltage selector.
3. Wiring:
   • Route power supply wires into the enclosure through designated knockouts.
   • Connect the Line (L1, L2 if applicable) and Load wires to the appropriate terminals as indicated on the wiring diagram (Figure 4).
   • Ensure all connections are tight and secure. Use 10-16 gauge copper conductors.
   • Refer to the specific wiring diagram in Figure 4 that matches your application (e.g., 120 VAC SPST, 240 VAC DPST).
4. Battery Installation/Check: The unit typically comes with AAA batteries pre-installed. Verify they are correctly seated. These batteries maintain programming during power outages.
5. Close Cover: Once wiring is complete and verified, close and secure the front cover.
6. Restore Power: Restore power at the circuit breaker. The unit should power on.

Figure 3: Internal view of the Intermatic ET1705C Time Switch, highlighting the voltage selector mechanism and wiring terminals. The safety warnings are also visible.

Figure 4: Detailed wiring diagrams for the Intermatic ET1700 Series, illustrating connections for different voltage and load types. Consult the diagram relevant to your specific model and application.

6. Initial Setup

After power is restored, the unit will display the current time and date. If the display is blank or incorrect, follow these steps:

1. Set Current Time and Day:
   • Press the MODE button until "SET TIME" appears.
   • Use the + and - buttons to adjust the hour, then press ENTER/NEXT.
   • Adjust minutes, then press ENTER/NEXT.
   • Adjust the current day of the week, then press ENTER/NEXT.
2. Set Current Date:
   • Press the MODE button until "SET DATE" appears.
   • Use the + and - buttons to adjust the year, then press ENTER/NEXT.
   • Adjust the month, then press ENTER/NEXT.
   • Adjust the day, then press ENTER/NEXT.
3. Daylight Saving Time (DST) Adjustment: The ET1705C automatically adjusts for DST. Ensure the DST setting is enabled (usually a default setting). Consult the on-screen prompts or the full manual for specific DST configuration if needed.

7. Operating and Programming

The ET1705C allows for up to 28 ON/OFF events (14 ON and 14 OFF) to be programmed across the 7 days of the week.

1. Entering Program Mode: Press the MODE button repeatedly until "PROGRAM" appears on the display.
2. Setting ON Events:
   • The display will show "1 ON". Use + and - buttons to set the desired ON time (hour and minute). Press ENTER/NEXT after each adjustment.
   • Next, select the day(s) of the week for this ON event. You can select individual days or blocks of days (e.g., Mon-Fri, Sat-Sun, Mon-Sun). Press DAY to cycle through day options. Press ENTER/NEXT to confirm.
3. Setting OFF Events:
   • After setting an ON event, the display will automatically move to "1 OFF". Set the desired OFF time and day(s) using the same method as for ON events.
   • Repeat this process for all desired ON/OFF events (up to 14 pairs).
4. Reviewing Programs: In PROGRAM mode, use ENTER/NEXT to cycle through all programmed events.
5. Clearing Programs: To clear a specific event, navigate to it in PROGRAM mode and press CLEAR ENTRY. To clear all programs, press and hold CLEAR MEM.
6. Manual Override:
   • Temporary Override: Press the ON/OFF button to manually switch the load ON or OFF. This override remains active until the next programmed event.
   • Permanent Override: Press and hold the ON/OFF button for a few seconds. The display will indicate a permanent override, and the unit will remain in that state until manually changed or the override is cancelled.
7. Exiting Program Mode: Press the MODE button until the current time and day are displayed, indicating normal operation.

8. Maintenance

• Battery Replacement: The ET1705C uses two (2) AAA Alkaline batteries for program backup. These batteries typically last for 3 years. When the battery indicator appears on the display, replace the batteries promptly to avoid loss of programming.
  1. Disconnect power to the unit at the circuit breaker.
  2. Open the front cover.
  3. Carefully remove the old AAA batteries and insert new ones, observing correct polarity.
  4. Close the cover and restore power.
• Cleaning: Clean the exterior of the unit with a soft, damp cloth. Do not use abrasive cleaners or solvents. Ensure no moisture enters the internal components.

9. Troubleshooting

10. Specifications

• Model: ET1705C
• Voltage: 120-277 VAC, 50/60 Hz (selectable)
• Switch Style: SPST (Single Pole Single Throw)
• Number of Events: Up to 28 (14 ON / 14 OFF)
• Battery Backup: Two (2) AAA Alkaline batteries (3-year minimum program retention)
• Operating Temperature: -40°F to 150°F (-40°C to 65°C)
• Dimensions: Approximately 3.3"D x 5.3"W x 8.1"H
• Weight: Approximately 2.5 pounds
• Mounting Type: Enclosure
• Material: Selector
• UPC: 078275109841

11. Warranty and Support

Warranty: This Intermatic ET1705C Time Switch comes with a 1-year limited warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. It does not cover damage resulting from improper installation, misuse, abuse, or unauthorized modifications.

Customer Support: For technical assistance, troubleshooting, or warranty claims, please contact Intermatic Customer Service. Refer to the official Intermatic website for current contact information.