Intermatic DT121C - Programmable Digital Timer Manual

Features

• Easy set up
• 2 on /2 off settings
• Minimum setting interval is 1 minute
• Can be used for incandescent lights up to 300 Watts
• Manual Override

Set Up

Batteries Activation-The timer is shipped with 2 batteries (L1154/SR44/LR44) installed.
Pull the protective strip from the battery carrier. The display will flash 12:00AM.
(Note: To conserve battery power, if the timer is not plugged in and no button is pushed, the display will go blank. To restore, press any button).

Clock

1. Press SET button once. The display will advance to TIME mode and the time will be flashing.
2. Press + or – button until time of day is displayed. Holding either button down will increase the speed of the setting.
   

On/Off Time

1. After the time is set, press SET button once. The display will now show EVENT 1 ON mode. EVENT 1 ON will be flashing with a blank display.
   
2. Press + or – to advance to the ON time.
3. Once the ON time is set, press SET button once. The display will now show EVENT 1 OFF.
   
4. Press + or – to advance to the OFF time.
5. Repeat Steps 1-4 for the 2nd ON/OFF settings.
6. When timer events are completed, press SET once. This will put the timer in RUN mode. The display will show the time of day entered, with the colon flashing.

Note: To clear an event time, push + and – buttons at the same time while in the ON or OFF mode that you want to clear

Lamp Connection

1. Turn lamp switch to ON position.
2. Plug lamp into the receptacle on the side of the timer.
3. Plug the timer into the wall outlet.

Manual Override

To override the ON or OFF settings, press ON/OFF button. The override setting will change at the next timed event.

Battery Replacement

When the batteries are running out, LO will be displayed.

1. Remove the timer from the wall socket.
2. Using a small flat screwdriver, pry the battery holder open. The DT121C uses 2 model L1154, SR44 or LR44 batteries.
   
3. Remove the old batteries (you have one minute to replace the batteries once the old batteries are removed without losing the existing programs) and replace the new batteries with the + facing the terminals.
   
4. When the batteries are in place, press the battery holder back into its original position.
5. Plug the timer into the wall socket.

Reset

To quickly delete the time and event settings, at one time, using the point of a pencil, press the RESET button found above the battery holder on the rear of the timer.

Ratings

8.3 Amp Resistive, and Inductive 300 Watt Tungsten, 120VAC, 60Hz

WARNINGS

1. DO NOT USE THE TIMER TO TURN OFF POWER FOR MAINTENANCE (repairs, removing broken bulbs, etc.). ALWAYS TURN POWER OFF AT THE SERVICE PANEL BY REMOVING AFUSE OR CIRCUIT BREAKER BEFORE DOING ANY CIRCUIT REPAIRS.

Documents / Resources

Download manual

Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.

Download Intermatic DT121C - Programmable Digital Timer Manual