Intermatic WH40 240V Electric Water Heater Time Switch Installation Manual

WH40 ELECTRIC WATER HEATER TIME SWITCH

DOUBLE POLE, 10,000 WATTS (40 AMP) MAX., 250 VOLT - 60 HZ.

LR3730

This Time Switch will repeat a preset schedule daily, except when the EXTERNAL MANUAL LEVER is used. This manual lever permits the user to turn the water heater ON and OFF ahead of the schedule. The Time Switch will resume the preset program by the next scheduled ON or OFF operation.

NOTE: The manual lever is inoperative for 15 minutes

CLOCK

DIAL

TIME

POINTER

GROUND

SCREW

MOTOR

CHECK

HOLE

TRIPPER immediately after the automatic operation.

The diagram on the right shows the mechanism and wiring of this Time Switch. The TIME POINTER is used to line up the correct time-of-day on the

CLOCK-DIAL. The ON and OFF TRIPPERS turn water heater ON and OFF at the times indicated by their respective position on the CLOCK-DIAL.

TO SET PROGRAM...First, mount silver finished

GRD

NEUT

LINE 1

LINE 2

MANUAL

LEVER

TO

WATER

HEATER

(ON) trippers at times you wish water heater to start operating. Place black (OFF) trippers at times you

120 240V

FROM

FUSE

BOX

NEUTRAL (WHITE) IF PRESENT

GROUND (GREEN OR BARE) want to turn water heater OFF. Fasten trippers to dial NOTE: CLOCK MOTOR LEADS ARE PREWIRED TO TERMINALS 1 & 3 by pushing them against the edge of the clock dial, then turning screws TIGHT with fingers.

Second, PULL clock dial out (toward you) and turn in either direction until correct time-of-day (the time now, when switch is being put into operation) is directly under the time pointer. Do not move pointer.

Third, close Time Switch cover. Make sure it is latched and locked, if needed.

AFTER POWER FAILURE (or if water heater was disconnected at the main panel), you must reset clock dial to the proper time-of-day.

TO SUSPEND AUTOMATIC OPERATION - Remove trippers from dial. Set manual lever as desired.

CAUTION: Always disconnect power at main panel before servicing this Switch or the water heater.

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