Is your water heater running when you don’t need it, spiking your energy bills? Or perhaps you’re waking up to cold showers because the timer isn’t syncing with your schedule? You are not alone. Many homeowners struggle with older mechanical timers, specifically looking for reliable Master Plumber Water Heater Time Control Model 318352 Instructions to regain control over their hot water usage.
This guide cuts through the confusion. We will walk you through the exact steps to set, reset, and troubleshoot this specific model, ensuring you save money without sacrificing comfort.
What Is the Master Plumber Model 318352?
Before diving into the buttons and dials, it helps to understand what you are working with. The Master Plumber Model 318352 is a mechanical time switch commonly used in residential electric water heaters. Unlike digital smart timers, this unit relies on a physical clock motor and trippers (pins) to turn the power on and off at set intervals.
These devices are prized for their durability and simplicity. However, “simple” can become frustrating if the manual is lost or unclear. According to the U.S. Department of Energy, turning down your water heater or using a timer can save significant energy, making proper setup crucial for both your wallet and the environment.
Why Do You Need a Timer for Your Water Heater?
You might wonder if the hassle of programming is worth it. The answer is a resounding yes, especially for specific household types.
- Vacation Homes: If the property sits empty for weeks, a timer prevents unnecessary heating.
- Shift Workers: If everyone is gone from 9 AM to 5 PM, why heat water for no one?
- Energy Savings: By limiting operation to peak usage times, you reduce standby heat loss.
| Feature | Benefit |
|---|---|
| Mechanical Reliability | No software updates or Wi-Fi required. |
| Cost-Effective | Lower upfront cost compared to smart thermostats. |
| Energy Reduction | Can reduce water heating costs by 10–20%. |
Step-by-Step: Master Plumber Water Heater Time Control Model 318352 Instructions
Setting up this timer requires precision. A mistake in the initial setup can lead to the timer being off by several hours. Follow these steps carefully.
Step 1: Safety First
Warning: Always turn off the power to the water heater at the circuit breaker before touching any wiring. If you are uncomfortable working with electrical components, hire a licensed plumber.
Step 2: Set the Current Time
The most common error users make is ignoring the current time setting.
- Locate the large dial on the face of the timer.
- Rotate the dial clockwise until the arrow points to the current actual time.
- Ensure you distinguish between AM and PM. The dial is usually a 24-hour cycle or clearly marked. Note: If the power has been out, the clock may have stopped. You must reset this every time power is restored.
Step 3: Position the Trippers (Pins)
The Model 318352 uses small metal or plastic pins called “trippers” that slide onto the outer rim of the dial.
- ON Tripper: Place this pin at the time you want the water heater to start heating.
- OFF Tripper: Place this pin at the time you want the water heater to stop heating.
Example Scenario: If you want hot water from 6:00 AM to 8:00 AM for morning showers:
- Slide the ON tripper to the 6:00 mark.
- Slide the OFF tripper to the 8:00 mark.
Tip: Some models allow multiple ON/OFF cycles per day. Check your specific unit’s capacity, but typically, two pairs of trippers are standard for morning and evening use.
Step 4: Engage the Manual Override Switch
Most Master Plumber timers have a lever or switch labeled “Auto” and “On.”
- Auto: The timer follows the tripper settings.
- On: The water heater runs continuously, ignoring the timer. Use this if you need extra hot water for a large load of laundry or guests.
Ensure the switch is set to Auto for normal operation.
Troubleshooting Common Issues
Even with perfect instructions, things can go wrong. Here are the most frequent problems associated with the Model 318352 and how to fix them.
The Timer Is Not Advancing
If the clock face isn’t moving, the motor may be dead or jammed.
- Check Power: Ensure the breaker is on.
- Listen: Put your ear near the timer. You should hear a faint humming sound. If it’s silent, the motor likely needs replacement.
- Jamming: Sometimes, dust or debris jams the gears. Gently tapping the side of the casing can sometimes free it, but replacement is often more cost-effective.
Water Is Cold at Scheduled Times
- Verify Tripper Placement: Double-check that the ON tripper is actually before the OFF tripper in the clockwise direction.
- Check the Override: Ensure the manual switch hasn’t been accidentally bumped to “Off” (if applicable) or that the circuit breaker hasn’t tripped.
- Heater Element Issue: The timer might be working, but the heating element inside the tank could be faulty. Use a multimeter to test the element if you are experienced.
The Timer Runs Slow or Fast
Mechanical timers can drift over time due to wear or voltage fluctuations.
- Adjustment: Unfortunately, most consumer-grade mechanical timers like the 318352 do not have a calibration screw. If it drifts significantly (more than 15 minutes a week), it is best to replace the unit.
Maintenance Tips for Longevity
To ensure your Master Plumber timer lasts as long as possible, consider these maintenance tips:
- Keep It Clean: Dust accumulation can interfere with the mechanical movement. Wipe the faceplate with a dry cloth annually.
- Avoid Moisture: While rated for utility areas, direct water spray can damage the clock motor. Ensure the cover is sealed if installed in a damp basement.
- Annual Check: Once a year, verify the time setting. Daylight Saving Time changes are a perfect reminder to check your timer’s accuracy.
FAQ: Master Plumber Water Heater Time Control Model 318352
Q1: Can I use the Model 318352 for a gas water heater? No. This timer is designed for electric water heaters where it controls the electrical current to the heating elements. Gas water heaters use a thermocouple and gas valve system that does not interface with this type of electrical timer.
Q2: What happens if the power goes out? Since the Model 318352 is a mechanical timer with a synchronous motor, it will stop counting when the power is cut. When power returns, the clock will resume from where it left off, meaning the time will be incorrect. You must manually reset the current time after any power outage.
Q3: How many ON/OFF cycles can I set per day? Typically, this model supports two full cycles per day (e.g., Morning ON/OFF and Evening ON/OFF). This requires four trippers total (two ON, two OFF). Check your specific packaging, as some variations may support more.
Q4: Is it difficult to replace an old timer with the Model 318352? If you are comfortable with basic wiring, it is straightforward. You will need to connect the line voltage (incoming power) and load wires (to the heater) to the correct terminals. Always label wires before disconnecting the old unit. If unsure, consult a professional.
Q5: Why is my timer making a loud clicking noise? A loud click is normal when the trippers engage or disengage the switch. However, a continuous grinding or buzzing noise indicates a failing motor or gear issue. In this case, replacement is recommended to prevent total failure.
Conclusion
Mastering your Master Plumber Water Heater Time Control Model 318352 Instructions is a small effort with big rewards. By correctly setting the time and trippers, you can significantly reduce your energy footprint and extend the life of your water heater elements. Remember, the key to success is accuracy in setting the current time and regular checks after power outages.
Don’t let a confusing manual keep you in the cold. Take control of your home’s efficiency today.
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