T173 - Switch INTERMATIC - Free user manual and instructions
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| Product Type | 24-Hour Mechanical Timer Switch |
| Brand | Intermatic |
| Model | T173 |
| Voltage Rating | 120V AC, 60Hz |
| Current Rating | 15A |
| Maximum Load | 1800W (resistive) |
| Motor Rating | 1/2 HP |
| Timing Range | 24-hour cycle with 24 ON/OFF trippers |
| Minimum On/Off Interval | 30 minutes |
| Manual Override | Yes, via side lever |
| Mounting | Standard 2-inch wall box |
| Dimensions (H x W x D) | 3.2 x 1.8 x 1.5 inches |
| Weight | 0.3 lbs (136 g) |
| Enclosure Material | High-impact thermoplastic |
| Power Supply | Hardwired, 120VAC |
| Indicator Light | None |
| Certifications | UL Listed |
| Operating Temperature | 0°C to 40°C (32°F to 104°F) |
| Maintenance | Wipe with dry cloth; no lubrication required |
| Safety Warnings | Indoor use only; disconnect power before servicing |
| Spare Parts & Repairability | Trippers available; internal parts not user-serviceable |
Frequently Asked Questions - T173 INTERMATIC
How do I set the timer on the Intermatic T173?
To set the timer, first ensure the dial is rotating correctly. Then, insert trippers (included) onto the dial at the desired ON and OFF times. Each tripper toggles the circuit on or off at the time it passes the indicator pin. Turn the dial so the current time aligns with the triangle marker, and the timer will automatically switch at the programmed times.
Can the T173 control both lights and motors?
Yes, the Intermatic T173 is rated for 15A and 1800W resistive loads, as well as 1/2 HP for motor loads. This makes it suitable for controlling incandescent lights, ceiling fans, exhaust fans, and small appliances within these limits.
Does the T173 have a manual override?
Yes, the T173 is equipped with a manual override lever on the side of the switch. Move it to the ON position to temporarily turn the load on outside of the programmed schedule. The timer will resume control at the next set time.
What is the maximum load capacity of the T173?
The maximum load is 15 amps or 1800 watts for resistive loads (e.g., incandescent bulbs). For inductive loads such as motors, the maximum is 1/2 horsepower. Do not exceed these ratings to avoid damage or fire hazard.
How do I install the Intermatic T173?
Installation must be done by a qualified electrician. Connect the black lead from the circuit breaker to the line terminal, the black lead to the load, the white lead to neutral, and the green ground wire to the grounding screw. Ensure power is off before wiring. Fit the timer into a standard 2-inch wall box.
Does the T173 require a neutral wire?
Yes, the internal clock motor operates at 120V and requires a neutral connection to function. If your wall box has no neutral wire, the timer will not operate correctly. Consult an electrician for alternative solutions.
Is the T173 compatible with LED bulbs?
Yes, the T173 uses mechanical contacts that can switch LED loads as long as the total wattage is within the 1800W rating. It does not suffer from flickering issues common with electronic timers. However, for LED loads below 15W, some timers may not provide a proper current path, but the mechanical switch eliminates this problem.
How do I maintain and clean the T173?
For cleaning, wipe the exterior with a dry cloth. Never use water, solvents, or abrasive cleaners. Do not apply lubricants to the mechanism. Periodically check the trippers for wear and replace them if damaged. Keep the timer free from dust to ensure smooth dial rotation.
What should I do if the timer does not keep proper time?
First, verify that the T173 is receiving 120V power and the dial is rotating. If the dial is stuck, remove any obstructions. If the clock motor is defective, it may need replacement. The timer uses a synchronous motor driven by the AC frequency; if it's still off, check that the trippers are correctly positioned and not slipping.
Is the T173 suitable for outdoor use?
No, the Intermatic T173 is designed for indoor use only. It is not weatherproof and lacks the necessary sealing. For outdoor applications, consider a waterproof timer enclosure or a specifically rated outdoor timer.
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USER MANUAL T173 INTERMATIC
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Product information
Brand : INTERMATIC
Model : T173
Category : Switch