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®

Electronic Seven Day Time Switch

With Photo Sensor Enable And Battery Powered Carryover

ET716CK

OWNER/ INSTALLER INSTRUCTION MANUAL

ATTENTION: READ CAREFULLY BEFORE ATTEMPTING TO INSTALL YOUR INTERMATIC

TIMER! FAILURE TO COMPLY WITH INSTRUCTIONS COULD RESULT IN PERSONAL INJURY

AND/OR PROPERTY DAMAGE! RETAIN FOR FUTURE REFERENCE.

Description

The Intermatic Model ET716CK is an Electronic
Seven Day TIme Switch with Photo Sensor Enable.
Loads can be automatically switched ON or OFF
according to a programmed schedule, providing
appropriate light levels exist. The Photo Enable func-
tion ensures that loads are ON only if the ambient light
level is low enough to require lighting and only if the
user programmed schedule is switched ON. This timer
is not designed to directly switch loads over 5 amps or
tungsten (lamp) or other high inrush loads. The pro-
gram will allow up to 28 set points (14 ON/ 14 OFF)
with up to 196 set points by using repeat daily cycling
for a seven day schedule. The photo sensor assembly
includes a sliding bracket which can be adjusted to
partially shield the photo cell, thereby increasing the
light level at which the load will switch ON and OFF.
The photo sensor can be located up to 1,000 feet from
the electronic time switch using ordinary 18 AWG bell
wire.
CAUTION: Connections made to the photo sensor
inputs, 

must be made outside of the enclosure and

made using UL listed 14 to 18 AWG wire. DO NOT
apply power to the photo sensor inputs.

Time Switch Specifications

CLOCK VOLTAGE: 120, 240, 277  volt A.C. 60 Hz.
POWER CONSUMPTION: 3.5 Watts Max.
CONTACT RATING: 5 Amps. Resistive @ 24-277
V.A.C. DPDT Isolated Contacts.
SET POINTS: (“On” or “Off”): 28 Total
BATTERY POWERED CARRYOVER: 24 hours.
MIN: “ON” or “OFF” TIME: 1 Minute
MAX. “ON” or “OFF” TIME: 6 Days 23 hours 59 
minutes.
SHIPPING WEIGHT: 2.9 Lbs. (1.32 Kg)
CASE: Drawn steel,; 7 3/4” (19.7 cm) high, 5”
(12.7cm) wide, 3” (7.6 cm) deep; gray finish w/lock-
able spring hasp.
KNOCKOUTS: Combination 1/2-3/4” (one on back
and each side, two on bottom)

Photo Sensor

Consists of photo cell light sensor. DO NOT apply
power to this sensor. Use only  the supplied photo
sensor with the ET716CK time switch.
HOUSING: Completely sonic welded Lexan case.
WIRING: 2-12” Wire leads provided; additional low
voltage wiring for remote installations is required.
PHOTO SENSOR ACTIVATION: 2 to 15 FC “ON” and
2 to 15 FC “OFF” without the use of the sliding brack-
et. A built in hysteresis of 10% minimum ensures that
the ON and OFF switching levels are not the same.
REPLACEMENT PHOTO CONTROL ONLY: Order
Intermatic part #177ET144A

General Safety Information

WARNING: Disconnect all power before installing or
servicing this timer or its connected loads. 
1. Follow all local electrical and safety codes, as well
as the National Electrical Code (NEC), and the
Occupational Safety and Health Act (OSHA).
2. If the power disconnect point is out of sight, lock it
in the “OFF” position and tag it to prevent unexpected
application of power.
3. This timer must be grounded.
4. Do not exceed the maximum current carrying
capacity of this timer.
5. Always replace the plastic insulator covering the

FULL ONE 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 replace

or repair it free of charge.

The warranty does not apply to: (a) damage caused by accident, abuse,

mishandling, dropping; (b) units which have been subject to unauthorized

repair, opened, taken apart; (c)) units not used in accordance with direc-

tions; (d) damage exceeding the cost of the product. Some states do not

allow a limitation of damages, so the foregoing limitation may not apply to

you. This warranty gives you specific legal rights and you may also have

other rights which vary from state to state.

This warranty service is available by either (a) returning the product to the

dealer from whom the unit was purchased, or (b) mailing postage prepaid

to the authorized service station listed. Please be sure to wrap the prod-

uct securely when mailing to avoid damage. This warranty is made by

Intermatic Incorporated, Intermatic Plaza, Spring Grove, Illinois

60081-9698. 

AUTHORIZED SERVICE STATION: INTERMATIC INCORPORATED,

INTERMATIC PLAZA, SPRING GROVE, IL 60081-9698.

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Summary of Contents for ET716CK

Page 1: ...sts of photo cell light sensor DO NOT apply power to this sensor Use only the supplied photo sensor with the ET716CK time switch HOUSING Completely sonic welded Lexan case WIRING 2 12 Wire leads provided additional low voltage wiring for remote installations is required PHOTO SENSOR ACTIVATION 2 to 15 FC ON and 2 to 15 FC OFF without the use of the sliding brack et A built in hysteresis of 10 mini...

Page 2: ...ide of pressure plate and insert surge suppressor lead under other side of pressure plate STEP 2 Securely tighten the terminal screw Be certain that the body of the surge suppressor is at least 1 2 inch from the timer switch case Insert surge suppressor s across each con tact switching an inductive load Do not use surge suppressors on both the normally open and normally closed side of the same out...

Page 3: ...t cycles Press 3 ON 2 Displays 3 3 flashing Press 4 ON 2 Displays 4 4 flashing Press 5 ON 2 Displays 5 5 flashing 3 The program is now complete It is suggested that the program be reviewed before activating the loads Follow the procedures shown in REVIEW REVIEW 1 Turn the selector switch to REVIEW 2 Press the button corresponding to the day being reviewed 3 The display will show one of the followi...

Page 4: ...to Sun 10 a m Turn to AUTO Or MAN Press recessed RESET button with pen or pencil and hold for two seconds While pressing ON indicator light will be lit and display will show a colon When released display should show 1 10 00 If unit does not clear properly try resetting with batteries removed and timer power on Check battery voltage defective cells will measure less than 2 volt If unit does not cle...

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