Intermatic T1905, T1905E Owner's Manual

Model: T1905

lR3730

PROGRAM TIME SWITCH

FOR UP TO 48 TIMING OPERATIONS 0N 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: 125 VolTS - 60 HZ.

TIMe dIAl

MANUAl leVeR

CAP NUTS

FIG. 1 WIRING dIAGRAM

INSUlAToR

CLOCK 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

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.

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.

INTERMATIC INCORPORATED

158TS10970

SPRING GROVE, ILLINOIS 60081-9698