Intermatic T7401B Owner's Manual

MODEL: T7401B

SEVEN-DAY DIAL TIME SWITCH

4 POLE SINGLE THROW

MINIMUM “ON” TIME 3-1/2 HR. UP TO 3-1/2 DAILY ON-OFF OPERATIONS

CONTACT RATINGS:

40 AMP. RESISTIVE EACH POLE 120V -480V AC.

40 AMP. INDUCTIVE, TUNGSTEN EACH POLE 120V, 208V, 240V, OR

277V AC. 1000 VA PILOT DUTY EACH POLE 120V - 277V AC.

24 FLA, 144 LRA (2 HP) - 120V AC.; 28 FLA, 168 LRA (5 HP) - 240V AC.

SINGLE PHASE

28 FLA, 168 LRA (7 1/2 HP) -208V AC., (10 HP) -240V AC. 3 PHASE

CLOCK MOTOR: 125 VOLTS - 60 HZ.

FOR REPLACEMENT MOTOR, ORDER WG1600

CLOCK

MOTOR

LR3730

A

5

2

1

6

7

4

3

8

120 V
60 HZ

B

TO
LOADS

SUPPLY

GROUND

WIRING DIAGRAM

SCREW

WIRING INSTRUCTIONS

This Time Switch can be wired to control one to four circuits simultaneously on a seven
day schedule. Clock motor voltage may be other than load voltage, but must be as
specified. For terminal markings, internal wiring and contact arrangements refer to wiring
diagram above. Use solid or stranded COPPER only wire with insulation to suit installation.
See table for gauge selection. To make power connections remove 1/2 inch of insulation from
wire ends. Insert bare ends of wire under the pressure plate of terminals. Use 3/16 or larger
screw driver to tighten terminal screws firmly. REPLACE FRONT INSULATOR BEFORE

TURNING ON ELECTRICITY.

MINIMUM

COPPER

WIRE SIZE

(AWG)

14
12
10

8

MAX.
LOAD

(AMP)

15
20
30
40

MIN.

INSUL-

ATION

TEMP(°C)

60
60
60
75

75°C INSULATION MAX. MOTOR

240 V.

2

2 1/2

3
5

LOAD (HP)

SINGLE PHASE

120 V.

1/2

1
2

-

208 V.

3
4
5

7 1/2

3 PHASE

240 V.

7 1/2

10

PRESSURE PLATE

TERMINAL SCREW

3
5

MAKE SURE WIRE
INSULATION CLEARS
PRESSURE PLATE

PROGRAMMING INSTRUCTIONS

1. TO SET “ON” TIMES, place bright ON trippers against edge of CLOCK-DIAL at
day-of-week and time-of-day when “ON” operations are desired. Tighten tripper
screws securely.

2. TO SET “OFF” TIMES, place dark OFF trippers against edge of CLOCK-DIAL at
times when “OFF” operations are desired. Tighten tripper screws securely.

3. TO SKIP DAYS, omit trippers for the day(s) automatic operations is/are not required.

4. TO SET DIAL TO TIME-OF-DAY, turn dial CLOCKWISE and align the exact day-of­ week and time-of-day (AM or PM) on dial with the TIME POINTER. Some allowance
may be required to compensate for gear backlash.

CAUTION: DO NOT MOVE POINTER OR FORCE DIAL COUNTERCLOCKWISE.

OPERATING INSTRUCTIONS

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

• IN CASE OF POWER FAILURE OR TO ADVANCE/RETARD TIME: Reset time-of­ day, see step 4 of programming instructions.

DISCONNECT ELECTRICITY BEFORE ANY BEHIND-THE-INSULATOR WORK.

INTERMATIC INCORPORATED

SPRING GROVE, ILLINOIS 60081-9698

158TS10978