Intermatic 158TS10968 User Manual

158TS10968 7/27/04 4:10 PM Page 1

MODEL: T1872BR

24 HOUR DIAL TIME SWITCH WITH “SKIPPER®”

2 NORMALLY OPEN - 2 NORMALLY CLOSED SET OF CONTACTS

Y BE WIRED AS DOUBLE POLE DOUBLE THROW)

(MA

LR3730

40 AMP. RESISTIVE, EACH POLE 120-480 VOLT AC;
40 AMP INDUCTIVE TUNGSTEN OR 1000 VA PILOT DUTY EACH POLE
120-277 VOLT AC; 2 HP (24 FLA) - 120V AC; 5 HP (28 FLA) - 240V AC.

INDEPENDENTLY WIRED CLOCK MOTOR: 208-277 VOLTS-60 HZ.

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

TIME
POINTER

TIME
DIAL

OFF
TRIPPER

MANUAL
LEVER

MAX.
LOAD

(AMP)

15
20
30
40

FIGURE 1

REPLACE INSULATOR BEFORE TURNING ON ELECTRICITY.

MIN.
INSUL­ATION

TEMP(°C)

60

60

60

75

WIRING INSTRUCTIONS: To wire switch
follow diagram above. If DOUBLE POLE
DOUBLE THROW switch action is
required, install jumpers (extend supply
wires) between terminals 1-6 and 3-8.
Use solid or stranded COPPER wire with insulation to suit installation. See gauge
selection table for normal service applications. To make power connections see
illustration below.
Motor voltage and cycle (Hz.) must be as specified.

MINIMUM

COPPER

WIRE SIZE

(AWG)

14
12
10

8

ON/CUTOUT
TRIPPER

DAY
ARROW

SKIPPER
WHEEL

SKIPPING
SCREW

75°C INSULATION MAX. MOTOR

LOAD (HP)

SINGLE PHASE

120 V. 240 V. 208 V.

2

1/2

2 1/2

1
2

-

N/A

3
5

3 PHASE

240 V.

N/A

208­277V

SUPPLY

SUPPLY

GROUND

SCREW

CLOCK

MOTOR

WIRING DIAGRAM

PRESSURE PLATE
TERMINAL SCREW
MAKE SURE WIRE

INSULATION CLEARS
PRESSURE PLATE

TO
LOADS

PROGRAMMING INSTRUCTIONS

• TO SET “ON” AND “OFF” TIMES: Hold trippers against edge
of CLOCK-DIAL, pointing to time (AM or PM) when ON and
OFF operations are desired, tighten tripper screws firmly. For
additional tripper pairs on CLOCK-DIAL order 156T1948A.

• TO SET TIME-OF-DAY: Pull CLOCK-DIAL outward. Turn in

either direction and align the exact time-of-day on the

DIAL (the time now, when switch is being put into operation) to

CLOCK-

the pointer. DO NOT MOVE POINTER.

• TO SKIP OPERATION(S) ON SELECTED DAY(S): Insert SKIPPING
SCREW(S) in SKIPPER WHEEL for day(s) automatic operation(s)
is/are NOT required. Tighten screws firmly. Move MANUAL LEVER to
“OFF” and rotate SKIPPER WHEEL to locate correct day-of-week

opposite DAY ARROW-- “YESTERDAY” if ON/CUTOUT TRIPPER
has not yet advanced wheel “TODAY” if it has.

OPERATING INSTRUCTIONS

• TO OPERATE SWITCH MANUALLY: Move MANUAL LEVER below
CLOCK-DIAL left or right as indicated by arrows. This will not effect

next operation.

CAUTION: TO AVOID SLOW SWITCH ACTION FAILURE, DO NOT
OPERATE SWITCH MANUALLY NOR PLACE A TRIPPER 4 HOURS
PRIOR TO ON/CUT

OUT TRIPPER SWITCHING.

• IN CASE OF POWER FAILURE, reset CLOCK-DIAL to

proper time-of-day. See programming instructions.

INTERMATIC INCORPORATED

158TS10968

SPRING GROVE, ILLINOIS 60081-9698