Intermatic T1906 Owner's Manual

Model T1906

PROGRAM TIME SWITCH

FOR UP TO 48 TIMING OPERATIONS

LR3730

ON 24 HOUR SCHEDULE
SINGLE POLE DOUBLE THROW

SWITCH RATING: 20 AMP. 125-480 VOLTS A.C. 1/2 HP-125V 1 HP-250V.

CLOCK MOTOR: 208- 277 VOLTS - 60 HZ.

CLOCK MOTOR VOLTAGE AND CYCLE MUST BE AS SPECIFIED. TO ORDER
REPLACEMENT, INDICATE PART NO. (WG--) ON MOTOR COVER.

CLOCK

TIME
DIAL

MANUAL
LEVER

CAP
NUTS

FIG. 1 WIRING DIAGRAM

TIME

INSULATOR

MOTOR

N.O.

SUPPLY

NORMALLY CLOSED CIRCUIT

NORMALLY OPEN CIRCUIT

N.C.

COM.

CLOCK

N.C.

LOAD

NO.

LOAD

WIRING INSTRUCTIONS

This Time Switch can be wired to control two circuits as Single Pole
Double throw, or to control one circuit as Single Pole Single Throw. Either
normally open (NO) or normally closed (NC). To wire switch see wiring
diagram above.

TO PROGRAM TIME SWITCH, Depress tripper(s) into dial at desired

1.

time(s) operation(s) is/are required.

• ON TIME: First tripper turns on the load for 16-20 minutes. Each

additional tripper will lengthen the on time by 15 minutes.

• OFF TIME: First tripper in raised position turns off the load for

10-14 minutes.Each additional space will lengthen the of time by 15
minutes.

2.

SET TIME-OF-DAY: Turn dial in clockwise direction only and align

the exact time-of-day (the time now when switch is being put into
operation) to the “TIME” arrow on insulator.

OPERATING INSTRUCTIONS
TO CONTROL LOADS MANUALLY, Move manual lever (See Figure

1) up. This lever will close normally open circuit and open the normally
closed circuit. To return, to automatic control, move lever back to its
original position .
IN CASE OF POWER FAILURE, reset dial. See step (2) of programming
instructions.
TO REMOVE MECHANISM FROM CASE, Disconnect electricity and all
wiring. Depress retainer spring at upper left, or unscrew mounting screws,
then grasp dial and pull mechanism out.

INTERMATIC INCORPORATED

SPRING GROVE, ILLINOIS 60081-9698

154--00920