T103 - Digital Timer INTERMATIC - Free user manual and instructions

Product Type	Digital Timer
Brand	Intermatic
Model	T103
Contact Configuration	Double Pole Single Throw (DPST)
Contact Rating	40 A Resistive, Inductive, Tungsten or 1000 VA Pilot Duty per pole (120/208/240 VAC); 2 HP (24 FLA) @ 120 VAC, 5 HP (28 FLA) @ 240 VAC; 16 A Electronic Ballast @ 277 VAC
Clock Motor Voltage	120 VAC, 60 Hz
Wire Requirements	Solid or stranded COPPER conductors only, minimum 90°C insulation, remove 1/2 inch insulation, tighten screws 2-18 in-lbs
Minimum Copper Wire Size	14 AWG for 15 A, 12 AWG for 20 A, 10 AWG for 30 A, 8 AWG for 40 A
Maximum Motor Load (Single Phase)	1/2 HP @ 120 V, 2 HP @ 240 V (14 AWG); 1 HP @ 120 V, 2 1/2 HP @ 240 V (12 AWG); 2 HP @ 120 V, 3 HP @ 240 V (10 AWG); - @ 120 V, 5 HP @ 240 V (8 AWG)
Programming Method	Trippers set ON/OFF times by holding against clock-dial edge and tightening screws; additional trippers available (156T1978A)
Time-of-Day Setting	Pull clock-dial outward, turn to align current time with pointer
Manual Override	Move manual lever left or right below clock-dial
Power Failure Recovery	Reset clock-dial to proper time-of-day after power restores
Safety Warnings	Disconnect power before installation/service; use copper conductors only; replace plastic insulator before powering on; keep door closed when not servicing; rotate timer dial clockwise only; do not move clock hands
Certifications	C US, UL listed (LR3730)
Replacement Parts	Order by part number (WG--) on motor cover for clock motor

Frequently Asked Questions - T103 INTERMATIC

How do I set the current time on the Intermatic T103 timer?

Pull the clock-dial outward, turn it in either direction to align the exact time-of-day with the pointer. Do not move the pointer.

How do I program ON and OFF times?

Hold the trippers against the edge of the clock-dial, pointing to the desired time (AM or PM) for ON and OFF operations. Tighten the tripper screws firmly. For additional tripper pairs, order part 156T1978A.

What wire type and size should I use?

Use solid or stranded COPPER conductors only. Minimum insulation temperature 90°C. Strip 1/2 inch of insulation and tighten terminal screws to 2-18 in-lbs. Minimum wire size: 14 AWG for 15 A, 12 AWG for 20 A, 10 AWG for 30 A, 8 AWG for 40 A.

What are the electrical ratings of the T103?

The contacts are DPST rated 40 A resistive/inductive/tungsten or 1000 VA pilot duty per pole at 120/208/240 VAC. Motor ratings: 2 HP (24 FLA) at 120 VAC, 5 HP (28 FLA) at 240 VAC. Also 16 A electronic ballast at 277 VAC.

Can I use the manual lever to override the timer?

Yes, move the manual lever below the clock-dial left or right as indicated by arrows. This will not affect the next programmed operation.

What should I do after a power failure?

Reset the clock-dial to the proper time-of-day following the programming instructions. The timer will resume normal operation.

Is the timer compatible with three-phase motors?

Yes, for three-phase motors at 240 V, maximum horsepower ratings: 2 HP (14 AWG), 2.5 HP (12 AWG), 3 HP (10 AWG), 5 HP (8 AWG). Refer to the wire size chart for details.

How do I replace the clock motor?

To order a replacement, indicate the part number (WG--) located on the motor cover. Ensure the voltage and cycle match the original specification (120 VAC, 60 Hz).

What safety precautions should I take during installation?

Disconnect power at the circuit breaker or disconnect switch before servicing. Follow national and local electrical codes. Replace the plastic insulator covering terminals before powering on. Keep the door closed when not servicing. Rotate the timer dial clockwise only.

Can I use aluminum wire with this timer?

No, only COPPER conductors are allowed. Using aluminum wire may cause overheating and fire risk.

USER MANUAL T103 INTERMATIC

DOUBLE POLE SINGLE THROW (DPST)

40 A RESISTIVE, INDUCTIVE, TUNGSTEN

OR 1000 VA PILOT DUTY EACH POLE 120/208/240 VAC

2 HP (24 FLA) - 120 VAC; 5 HP (28 FLA) - 240 VAC

16 A ELECTRONIC BALLAST, 277 VAC

C US

LR3730

UL

HOLOGRAM

LABEL

WARNING Risk of Fire or Electric Shock

• Disconnect power at the circuit breaker(s) or disconnect switch(es) before installing or servicing.
  • Installation and/or wiring must be in accordance with national and local electrical code requirements.
• Use wires rated at least 90^ - COPPER conductors ONLY.
• Replace plastic insulator covering terminals before powering ON.
• KEEP DOOR CLOSED AT ALL TIMES when not servicing.

- Rotate timer dial clockwise only.

- Do not move the clock hands on the timer. Moving the clock hands can damage the timer.

CLOCK MOTOR: 120 VAC, 60 HZ.

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

WIRING INSTRUCTIONS: Remove 1/2 inch of insulation from wire ends. Tighten terminal screws firmly (2-18 in-lbs). Use solid or stranded COPPER conductors only. May use two wires of the same size and type.

MINIMUM COPPER WIRE SIZE (AWG)	MAX. LOAD (AMP)	MIN. INSULATION TEMP(°C)	75°C INSULATION MAX. MOTOR LOAD (HP)
			SINGLE PHASE		3 PHASE
			120 V. 240 V. 208 V.			240 V.
14	15	90	1/2	2	N/A	N/A
12	20	90	1	2 1/2
10	30	90	2	3
8	40	90	-	5

Pure mechanical diagram showing a lever and lever assembly without any text, numbers, or symbols

PRESSURE PLATE

TERMINAL SCREW

MAKE SURE WIRE INSULATION CLEARS PRESSURE PLATE

PROGRAMMING INSTRUCTIONS

1. 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 156T1978A.
2. TO SET TIME-OF-DAY: Pull CLOCK-DIAL outward. Turn in either direction and align the exact time-of-day on the CLOCK-DIAL (the time now, when switch is being put into operation) to the pointer. DO NOT MOVE POINTER.

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.
- IN CASE OF POWER FAILURE, reset CLOCK-DIAL to proper time-of-day. See programming instructions.