Intermatic ET102C, ET104C User Manual

®

Electronic 24 Hour Time Switches

With Battery Carryover

OWNER/INSTALLER INSTRUCTION MANUAL

ATTENTION: READ CAREFULLY BEFORE ATTEMPTING TO INSTALL YOUR INTERMATIC
TIME SWITCH. FAILURE TO COMPLY WITH INSTRUCTIONS COULD RESULT IN PERSONAL
INJURY AND/OR PROPERTY DAMAGE! RETAIN FOR FUTURE REFERENCE.

Description

The Intermatic Electronic 24 Hour Time Switch automatical­ly switches loads according to a preset daily schedule.
This time switch is designed to directly switch loads up to
30 amps and to switch resistive or inductive loads up to
the time switch rating. For use as a control timer in
applications requiring 24 hour load control such as
lighting, heating, air conditioning systems, pumps,
etcetera. Up to eight set points or events (4 ON/4 OFF) can
be preset. this schedule will repeat on a daily basis. The
program can be overridden by using the MANUAL position.

Specifications

CLOCK VOLTAGE: 120, 208, 240, 277 V.A.C., 60 Hz.
Jumper Selectable
POWER CONSUMPTION: 3.0 Watts Max. (ET102C)

6.0 Watts Max. (ET104C)
CONTACT CONFIGURATION: SPST model ET102C
DPST model ET104C.
SWITCH RATING: (Per Pole for ET104C)

• 30 Amps Inductive/Resistive, 24/120/240 V.A.C., 60 Hz.

• 20 Amps Resistive - 28 V.D.C.,

•1 H.P. 120 V.A.C., 60 Hz.

•2 H.P. 240 V.A.C., 60 Hz.

•5 Amps Tungsten, 120/240 V.A.C., 60 Hz.

• 20 Amps Ballast 277 V.A.C., 60 Hz.
SET POINTS (EVENTS): 8 total (4 ON/4 OFF).
BATTERY POWERED CLOCK OPERATION: 3 Years minimum
(AA industrial grade alkaline supplied with time switch)
MIN. “ON” or “OFF” TIME: 1 minute.
MAX. “ON” or “OFF” TIME: 23 hours 59 minutes.
SHIPPING WEIGHT: 2.5 Lbs. (1.1 Kg)
CASE: Drawn steel; 7-3/4” (19.7 cm) high, 5” (12.7 cm)
wide, 3” (7.6 cm) deep; gray finish w/lockable spring hasp.
KNOCKOUTS: Combination 1/2 - 3/4” (one on back and
each side, two on bottom).

General Safety Information

WARNING: Disconnect all power before installing or
servicing this time switch or its connected loads.

1. Follow all local electrical and safety codes, National

Electric Code (NEC), as well as 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 time switch case must be grounded.

4. Do not exceed the maximum current carrying capacity of this

time switch.

5. Always replace the plastic insulator covering the terminal

before turning power “ON”.

AM ON

5:20

ET100 SERIES

INCLUDING MODELS:

ET102C, ET102CM (SPST)
ET104C, ET104CM (DPST)

Installation

WARNING: DISCONNECT THE POWER TO THE TIME
SWITCH AND THE LOADS BEFORE INSTALLING THIS
TIME SWITCH.

1. Mount the time switch in the desired location using the
three mounting holes which are provided. Mount the
time switch at eye level, if possible, providing sufficient
room to the left of the enclosure for the cover to swing
open fully. (See Figure #1 and Figure #3) The time
switch mechanism does not need to be removed from
the enclosure to mount the time switch since the top
mounting hole is a slotted type mounting hole. Secure a
screw or other fastener at eye level. the head of the
screw or fastener should be slightly larger than the
narrow portion of the slotted hole to ensure that the time
switch is securely held in place. the remaining two
mounting holes are accessible without removing the
time switch mechanism and will provide secure and
permanent mounting of the time switch.

2. If you do remove the mechanism, refer to Figure #1 and
remove the mechanism from the case by depressing the
catch at the top of the case and pulling out. Timer is
shipped set for 240 VAC timer supply operation by
means of a plastic covered shorting bar on the printed
circuit board. to operate timer at 120, 208 or 277 VAC,
move the shorting bar to the appropriate setting, as
marked on circuit board. (See Fig. 2).
CAUTION: DO NOT TOUCH THE CIRCUIT BOARD
COMPONENTS SINCE STATIC DISCHARGE COULD
DAMAGE THE MICROPROCESSOR.,

3. Replace the mechanism in the case if it has been
removed.

4. Lift the left side of the insulator off of the retaining post
and pivot it up and away to expose the terminal strip.

5. Strip the supply and load wires by removing 1/2 inch of
insulation. DO NOT USE ALUMINUM WIRE. (See
figures 3, 4 or 5). Insert the wire ends under the proper
terminal plates and tighten the screws firmly. Use AWG
#10 through #18. Connect ground wire to grounding
terminal at bottom of case.

6. Replace the plastic insulator.

7. Be sure that the battery is functioning properly. This can
be checked by making sure the display is visible. If the
display has scrambled information, press the RESET
switch and hold for three to five seconds. Note that the
battery can easily be replaced without removing the
time switch mechanism or field wiring. simply press in
and downward (in the direction of the arrow) on the
battery cover which is identified with the word “Battery”.
It is recommended that the battery be replaced with a
“AA” industrial grade alkaline cell at two to three year
intervals as part of the normal time switch maintenance
observing battery polarity markings when installing. No
other maintenance is required.

8. Place the selector switches in the “MANUAL” and
“RUN” positions.

9. Reapply power to the time switch.

FIG. #1

FIG. #2

FIG. #3

Knockouts

Mounting Holes