Can You Put a Timer on a Tankless Water Heater? The Ultimate Guide

Are you looking for a way to gain more control over your home‘s hot water while saving on energy costs? Installing a programmable timer on your tankless water heater allows you to customize run times to match your schedule. With this comprehensive guide, you‘ll learn all about the benefits of adding a timer, how to select and install one, and tips for optimizing your hot water schedule. Let‘s dive in!

Why Add a Timer to a Tankless Water Heater?

Here are the biggest reasons you should consider installing a timer on your on-demand tankless unit:

• Save significantly on energy bills – By programming the heater to only run when needed, you avoid wasting energy and money heating water when no one is home. Studies show timers can reduce gas water heating costs by 20-30%.

• Gain better control over hot water – A timer gives you oversight of your home‘s hot water schedule. It runs when you need it, and turns off when you don‘t.

• Enhance safety – Scheduling the hot water off when not in use reduces the risk of accidental scalding injuries.

• Extend equipment life – Less wear and tear from fewer daily ignition cycles can add years to the operating life of your tankless heater.

• Customize to your lifestyle – Timers allow you to match hot water availability to your family‘s unique schedule.

How Does a Water Heater Timer Actually Work?

Timers control a relay switch that cuts power to the tankless heater based on the on/off times you set. Here‘s a simple breakdown:

• Set customized schedules – Using the interface, you input the times you want your hot water switched on and off each day.

• Cuts electrical power – When an off time hits, the timer breaks the electrical connection to turn the tankless unit off.

• Relays power back on – At the next scheduled on time, the timer switch completes the circuit again to fire up the heater.

• Provides hot water – With power restored, the burner reignites to make hot water available again on demand.

Pretty straightforward right? The timer acts like an automated on/off switch based on the weekly schedule you program.

Choosing the Right Tankless Water Heater Timer

With a wide range of timers on the market, here are the key factors to consider for your tankless unit:

• Electrical rating – Match the voltage, amps, and number of poles to your heater. This is crucial.

• Type – Mechanical, digital, or WiFi enabled? Each have their pros and cons.

• Number of cycles – Ensure the timer has enough on/offs per day to program your optimal schedule.

• Interface – Pick a timer with an intuitive programing interface. Backlit LCD screens are great.

• Brand reputation – Stick with a brand known for reliability and quality construction.

Getting a timer well-suited for your particular tankless water heater will ensure flawless performance and longevity. Don‘t cheap out here!

Mechanical vs Digital vs WiFi Timers

Let‘s compare the three main timer types available:

Mechanical Timers

• Cheap – Basic mechanical timers are the most affordable option
• Manual – Changing settings requires moving mechanical pins
• Limited flexibility – Typically only allow 1-2 on/off cycles per day

Digital Timers

• Precise – Digital controls allow exact on/off times to the minute
• Multiple cycles – Can be programmed for several on/offs throughout the day
• Easy to set – User-friendly screens make programming a breeze

WiFi Enabled Timers

• Smartphone control – Connect to home WiFi for app-based remote access
• Advanced options – Often include vacation modes and other smart features
• Alerts enabled – Can send usage alerts and reminders to your phone
• Most expensive – All that technology comes at a higher price

While WiFi timers may be the most advanced, a standard digital model offers enough flexibility and ease of use for most homes.

Step-by-Step Guide to Installing a Tankless Water Heater Timer

Ready to install your new timer? Here is a step-by-step walkthrough:

Step 1 – Turn Off Power and Water to the Unit

Start by switching off the circuit breaker supplying electricity to your tankless heater. Then turn off the cold water shut-off valve.

Step 2 – Open the Control Panel

Locate the access panel on your unit and remove it to access the internal wiring and control board.

Step 3 – Identify the Power Wires

Find the power wires that connect to the control board. Typically a red (hot) and black (neutral) pair.

Step 4 – Connect the Matching Timer Wires

Consult your timer wiring diagram. Connect its wires to the corresponding hot and neutral wires in the heater.

Step 5 – Mount the Timer Control Box

Affix the timer‘s plastic mounting box to the wall near the heater. Provide some wire slack.

Step 6 – Restore Power and Water

Turn the water back on first, and then switch the circuit breaker back on to restore power.

Step 7 – Program the Timer Schedule

Use the interface to input your desired on and off times for each day.

That‘s the basic installation process. Always refer to the manufacturer‘s wiring instructions too. Now you can start optimizing the schedule!

Tips for Setting Your Tankless Water Heater Timer Schedule

With your timer installed, here are some tips for setting the optimal hot water schedule:

• Map peak usage – Note the main times your household uses hot water each day. Program the timer on 30 minutes prior.

• Allow reheating time – Set the timer on 30-60 minutes before peaks so there‘s adequate reheating.

• Find a balance – Weigh maximum savings against hot water availability.

• Adjust for seasons – Tweak your schedule as hot water needs change in winter/summer.

• Review after a month – Recheck settings after using it and make changes as needed.

Getting your schedule just right will take some refinement. The goal is maximizing energy savings without running out of hot water.

Sample Daily Hot Water Schedules

To give you an idea, here are some sample schedules for different homes:

Family of 4

• 5:00 AM – ON
• 7:30 AM – OFF
• 4:30 PM – ON
• 10:00 PM – OFF

Single Professional

• 6:00 AM – ON
• 8:00 AM – OFF
• 5:00 PM – ON
• 11:00 PM – OFF

Retired Couple

• 5:00 AM – ON
• 9:00 AM – OFF
• 4:00 PM – ON
• 9:00 PM – OFF

Tweak these to match your own household‘s routine and peak usage times.

Troubleshooting Common Tankless Water Heater Timer Problems

If your timer acts up, try these quick troubleshooting steps:

• Check for power – Use a voltmeter to confirm the timer is receiving power. If not, check the circuit breaker.

• Inspect connections – Make sure all wire connections are still secure and free of corrosion.

• Verify programming – Double check the timer still has your desired schedule programmed.

• Consult manual – Refer to the manufacturer troubleshooting guide for additional steps.

• Reset timer – If needed, reset the timer to factory default settings.

• Call electrician – For continued problems, contact the pros for evaluation.

With a process of elimination, you can typically resolve common timer issues yourself. But don‘t hesitate to call in backup if needed.

Safety Tips for Installing a Tankless Timer

To safely add a timer to your system, keep these precautions in mind:

• Hire electrician if needed – If not experienced with electrical work, have a pro handle the install.

• Confirm electrical rating – Again, the timer must precisely match the tankless heater.

• Provide sufficient clearance – Allow adequate space from combustibles as required.

• Check local codes – Verify any permits or inspections needed for a timer install.

• Follow instructions – Carefully follow the manufacturer‘s provided wiring and mounting directions.

Adhering to safety best practices will prevent electrical hazards and ensure code compliance.

Get More Savings Beyond a Timer

Once you have a tankless water heater timer installed, here are some additional ways to increase savings:

• Set your tankless temperature to 120°F – This provides safety and energy efficiency.

• Insulate hot water lines – This will reduce standby heat loss.

• Install low-flow fixtures – Showerheads, faucets, and aerators reduce hot water use.

• Fix any leaky faucets – Even small leaks waste large amounts of hot water over time.

• Drain 1-2 gallons from lines – This clears out tepid water after long off periods.

• Upgrade to a hybrid heat pump water heater – These provide the greatest efficiency.

Every bit of savings adds up! Use a combination of methods to maximize cost and energy savings.

Take Control of Your Hot Water with a Tankless Timer

Adding a programmable timer to your tankless water heater unlocks new levels of convenience and efficiency. With full control over creating a customized hot water schedule, you can balance maximum energy savings with ensuring hot water is available when your household needs it. Following the recommendations in this guide will make selecting and installing a timer quick and hassle-free. Take advantage of this simple upgrade to start saving both energy and money!