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Description
The Intermatic Electronic Astronomic 7-Day Time Switch automatically
switches loads according to a preset weekly schedule with up-to-the-
minute accuracy. The astronomic feature provides sunset On and sunrise
Off settings to eliminate the need for separate photo control devices. The
independent 7-day programming provides complete flexibility for
applications where load switching differs each day of the week. Astronomic
programming can be combined with independent programs to provide a
sunset On and time Off program.
For use as a on/off timer in applications requiring 7-day astronomic load
control such as lighting, heating, air conditioning systems, pumps, etc. Up
to 56 (14 ON & 14 OFF plus 14 Astro ON & 14 Astro OFF) set points
(EVENTS) can be preset. These set points can be programmed for any or
all 7 days to provide for up to 224 set points each week. The program can
be overridden by pushing the ON/OFF load override button(s).This time
switch is designed to directly switch tungsten or ballast loads up to the time
switch rating and inductive or resistive loads up to 30 amps at 120, 208,
240, or 277 volts.
Installation
WARNING: DISCONNECT THE POWER TO THE TIME SWITCH AND
THE LOADS BEFORE INSTALLING THIS TIME SWITCH.
1. Remove the mechanism from the case by depressing the catch at the
top of the case and pulling out. (See Figure #1) The timer is shipped set
for 120VAC operation by means of a selector switch. To operate timer at
208, 240 or 277 VAC, move the selector switch to the appropriate setting,
as marked on the circuit board (See Figure #2). The timer is shipped with
Daylight Savings Time (DST) enabled. To disable this feature insert a
jumper at location marked DST. The ET8215C timer is shipped with the
loads set to be independently controlled (IND), the outputs can be
changed to simultaneous or pulsed operation by moving the jumper to SIM
or PUL respectively. (See Figure #3 and wiring diagrams.)
CAUTION: DO NOT TOUCH THE CIRCUIT BOARD COMPONENTS
SINCE STATIC DISCHARGE COULD DAMAGE THE MICROPROCES-
SOR.
2. Mount the time switch in the desired location using the three mounting
holes that 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 #4)
3. Replace the mechanism in the case.
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 Wiring Diagrams). 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 batteries are functioning properly. This can be checked
by making sure the display is visible. If the display
information, press the [RESET] switch. Note that the batteries can easily
be replaced without removing the time switch mechanism or field wiring.
Simply press in and downward (in the direction of the arrows) on the
battery cover. It is recommended that the batteries be replaced with two
"AAA" industrial grade alkaline cells 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. Apply power to the time switch.
9. While pressing and holding the [ENTER] button press the [RESET]
button. The display will now be flashing 12:00 A.M. and MON and is in the
Manual mode. The time switch is now ready for programming.
has scrambled
FIgure 1
FIgure 2
FIgure 3
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