Intermatic EH10 User Manual
®
ELECTRONIC 7-DAY WATER -
HEATER TIME SWITCHES
MODELS EH10 AND EH40
WITH BATTERY CARRYOVER
MAN
AUTO
PROG
RUN
TIME
SET
ON
OFF
EVENT
DAY HOUR MIN
LOAD
RESET
BATTERY
OWNER/INSTALLER INSTRUCTION MANUAL
ATTENTION: READ CAREFULLY BEFORE ATTEMPTING
TO INSTALL YOUR INTERMATIC TIME SWITCH. FAIL-
URE TO COMPLY WITH INSTRUCTIONS COULD
RESULT IN PERSONAL INJURY AND/OR PROPERTY
DAMAGE! RETAIN FOR FUTURE REFERENCE.
MANUAL (MAN) - AUTOMATIC (AUTO)
(See Fig. 1)
•
MANUAL: Bypasses your program completely; timer
will not resume program until you return switch to
AUTO mode position.
•
AUTOMATIC: For automatically switching at ON/OFF
times; accurate to-the-minute.
PROGRAM (PROG) - RUN - TIME SET
•
PROGRAM: Use this position when programming.
•
RUN: Use this position for normal operation. Be sure to
return to RUN after setting time and program.
•
TIME SET: Use this position to set day and time of day.
ON/OFF - EVENT (the large push button) - Serves a dual
purpose
• EVENT: Used for programming (active only when switch
is set at PROG)
• ON/OFF: Override (active only when switch is set at
RUN); turns load ON if already off or OFF if already on.
Timer automatically resumes program cycle only when
slide switch is in AUTO. Note that this button is also
accessible without opening the enclosure.
SPECIFICATIONS:
Clock Voltage - Model EH40 - 240V. A.C., 50/60 Hz
EH10 - 120V. A.C., 50/60 Hz
Power Consumption - EH10 - 1.0 W. Max. EH40 - 3.0
W. Max..
Contact Configuration - EH10 (SPST) Single pole-single
throw model- EH40(DPST) Double pole-single throw model
Switch Rating (Per Pole) -
• 30 amp inductive/resistive - 120-240V. A.C., 60 Hz
• 1 H.P. 120V. A.C., 60 Hz.
• 1-1/2 H.P. 240V. A.C., 60 Hz.
• 5 amp tungsten, 120-240V. A.C., 60 Hz.
Set Points (Events) - 12 total (6 ON/6 OFF) - Can be
assigned in any combination to weekdays, weekend days,
daily or weekly operation providing up to a maximum of 84
weekly operations (42 ON/42 OFF).
Battery Powered Clock Operation - 3 years minimum,
AA industrial grade alkaline supplied with time switch.
Minimum ON/OFF Time - 1 Minute
Maximum ON/OFF Time - 6 days 23 hours 59 minutes
Shipping Weight - 2.37 Lbs. (1.05 Kg)
Case - Drawn steel, 7-3/4” (19.7 cm) high, 5” (12.7cm)
wide, 3” (7.6 cm) deep; gray finish with lockable spring
hasp, clear see-through viewing window and external over-
ride.
Knockouts - Combination of 1/2 - 3/4” (one on back and
each side, two on bottom)
Wire Size - AWG #10 through #18
GENERAL SAFETY INFORMATION:
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 Fig. #2). The time switch
mechanism does not need to be removed from the
enclosure to mount the time switch since the top mount-
ing hole is a slotted type mounting hole. Secure a screw
or other fastener at eye level. The head of the screw
of 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 provide a means to secure the time switch.
2. If you do remove the mechanism, refer to Figure #3 and
remove the mechanism from the case by depressing
the catch at the top of the case and pulling out.
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, making sure to engage ribs at sides of
mechanism between ears at sides of case before
snapping in place.
4. Lift the left side of the insulator off of the retaining post
and pivot it up and away to expose the terminal
screws.
5. Strip the supply and load wires by removing 1/2 inch of
insulation.
DO NOT USE ALUMINUM WIRE. Insert
the wire ends under the proper terminal plates and
tighten the screws firmly. Use any size wire,
AWG #10 through #18. Connect ground wire to
grounding terminal at bottom of case.
6. Replace the plastic insulator.
7. Follow instructions for battery installation. Be sure that
the battery is functioning properly. This can be checked
by seeing that the display is visible. If the display
has scrambled information, check to be sure that
the polarity orientation of the battery is as shown on
the cover label, then press the RESET switch and hold
for at least two 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
Fig. 3
Fig.2
®
Fig.1
Mounting Holes
Knockouts
Ground
Terminal
Snap Out Catch
Tilt Top Forward
Lift Up
To
Remove