DT27 DIGITAL TIMER INSTRUCTIONS
Introduction
Thank you for purchasing Intermatic's DT27C Lamp Timer with Astronomic feature. This timer can
control most 120 VAC loads up to the maximum rating on the timer label. The timer can control
incandescent lights and compact fluorescent lights, stereos and appliances such as an air conditioner.
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Easy-to-use controls and set-up operation
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Automatic or manual operation (Push the door cover for manual override).
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Program up to 7 ON and 7 OFF settings.
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Astronomic feature automatically adjusts for changing seasons (see Glossary of Terms)
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Automatic Daylight Savings Time adjustment (see Glossary of Terms)
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Multiple daily settings options:
• All days of the week
• Individual days of the week
• 5 weekdays
• 2 weekend days
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Large, easy-to-read digital display
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Optional Random feature automatically varies switching times +/-15 minutes for greater
security
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Two LR44 batteries keep time for up to 1-1/2 months without utility power
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Low battery indicator
Glossary of Terms
Astronomic Feature - The DT27 Astronomic Lamp Timer automatically compensates for changes in
the length of daylight throughout the year. For example, the sunset in Chicago, IL varies from
approximately 4:30 PM during December to approximately 9:00 PM during June. The DT27 auto-
matically adjusts for changes in daylight. SET THE TIMER ONCE AND NO RESETTING, BECAUSE
OF DAILY TIME CHANGES, IS REQUIRED.
Daylight Savings Time (DST) - The DT27 timer has an automatic Daylight Savings Time feature. The
AUTOMATIC setting will adjust for daylight savings time changes. The MANUAL setting prevents
automatic DST adjustments.
Astro Zone - (See map on page 3) The Astronomic program divides the United States into 3 zones.
The NORTH Zone refers to locations from north of Chicago, IL. The CENTRAL zone refers to
locations between Chicago, IL and southern Missouri. The SOUTH zone refers to locations south
of Missouri.
Programming AUTO, AUTO RANDOM, MANUAL
-See Fig. 12 (CLOCK DISPLAY)
-The display shows the time of day, day of the week and whether the
timer is set for ON or OFF. It also shows AUTO mode.
-In AUTO mode, the timer will work automatically as you have set it.
-To go to AUTO RANDOM mode, press
MODE +. AUTO RANDOM
mode will vary the ON/OFF times of your settings by +/- 15 minutes.
This feature gives your house a more “lived-in” look in order to deter burglars.
-To go to MANUAL mode, press
MODE +. The MANUAL mode will override the current timer setting
until MANUAL is changed again.
Congratulations, you have now programmed your DT27 timer.
Manual Override
-Press
ON/OFF or close the control cover and press the lower part of the cover.
-The override will change the current on/off timer setting until the next scheduled event takes effect.
Replacing Batteries
-The battery indicator on the display will show when the batteries are running down (See Fig. 2).
To replace the batteries:
-Place the flat end of a screwdriver under one of the holder slots and carefully pry the cover up.
-Remove the two batteries and replace with fresh LR44 batteries. Follow the placing of the batteries
as shown in the battery holder (See Fig. 13 BACK OF TIMER AND PROPER BATTERY SEATING).
RESET BUTTON (See Fig. 1):Using the tip of a pen, depress the RESET button in order to clear out
CLOCK settings only.
MEMORY CLEAR: In order to delete all settings, press and release RESET while pressing ENTER.
LIMITED 1 YEAR WARRANTY
If within one (1) year from the date of purchase, this product fails due to a defect in material or workmanship,
Intermatic Incorporated will repair or replace it, at its sole option, free of charge. This warranty is extended to the orig-
inal household purchaser only and is not transferable. This warranty does not apply to: (a) damage to units caused
by accident, dropping or abuse in handling, acts of God or any negligent use; (b) units which have been subject to
unauthorized repair, opened, taken apart or otherwise modified; (c) units not used in accordance with instructions; (d)
damages exceeding the cost of the product; (e) sealed lamps and/or lamp bulbs, LED’s and batteries;
(f) the finish on any portion of the product, such as surface and/or weathering, as this is considered normal wear and
tear; (g) transit damage, initial installation costs, removal costs, or reinstallation costs.
INTERMATIC INCORPORATED WILL NOT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES.
SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL
DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU. THIS WARRANTY IS IN
LIEU OF ALL OTHER EXPRESS OR IMPLIED WARRANTIES. ALL IMPLIED WARRANTIES, INCLUDING THE
WARRANTY OF MERCHANTABILITY AND THE WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE, ARE
HEREBY MODIFIED TO EXIST ONLY AS CONTAINED IN THIS LIMITED WARRANTY, AND SHALL BE OF THE
SAME DURATION AS THE WARRANTY PERIOD STATED ABOVE. SOME STATES DO NOT ALLOW LIMITA-
TIONS ON THE DURATION OF AN IMPLIED WARRANTY, SO THE ABOVE LIMITATION MAY NOT APPLY TO
YOU.
This warranty service is available by either (a) returning the product to the dealer from whom the unit was purchased,
or (b) mailing the product, along with proof of purchase, postage prepaid to the authorized service center listed below.
This warranty is made by: Intermatic Incorporated/After Sales Service/7777 Winn Rd., Spring Grove, Illinois 60081-
9698/815-675-7000 http://www.intermatic.com Please be sure to wrap the product securely to avoid shipping dam-
age.
INTERMATIC INCORPORATED
SPRING GROVE, ILLINOIS 60081-9698
158DT11724
Fig. 1
Fig. 2
Fig. 13
AUTO
PM
ON
TUE
Fig. 12
