Model # WH40DL3

Internet #203557614

Store SKU #700794

Intermatic 40-Amp 240-Volt Electric Water Heater Time Switch
0078275123878

Intermatic

40-Amp 240-Volt Electric Water Heater Time Switch

  • Convenient external override switch
  • NEMA 1 rated indoor steel enclosure
  • Residential, commercial, industrial, military,school applications
$5400 /each

Frequently Bought Together

Product Overview

The WH40 Mechanical Water Heater Time Switch regulates electric water heaters. Utilities in many areas of the country offer two electric rates for residential or commercial customers. One rate has the regular daytime rate, the other is the 'off-peak' rate. This 'off-peak' rate provides customers with lower priced electricity during the nighttime and weekend periods. This time switch allows the customer to shift electricity use into the 'off-peak' time periods in an attempt to save utility costs.

  • Double pole, single throw
  • Convenient external override switch
  • NEMA 1 rated indoor steel enclosure
  • CSA listed
  • For use in residential, commercial, industrial, military, and school applications
  • Additional sets of trippers are available - #156T1978A

Info & Guides

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Specifications

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Warranty / Certifications

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Customer Questions & Answers

Can you program different times on weekdays versus weekdays?

Can you program different times on weekdays versus weekdays?
Asked by: Alchem
No.
Answered by: Knad
Date published: 2017-01-04

is the manual lever in on or off position for the automatic times to work

Asked by: habib
Once your adjustable on / off clips are in and the clock rotates, it'll turn itself off (and stay off) until the "start clip" kicks it on... The switch, at this point can be manually turned on for more hot water if needed, but again, the OFF CLIP, will flip the lever back to off..
Answered by: SRT
Date published: 2017-04-25

wire melting?

I have had two of these at two different residences and after 5+ years of service the wires have melted at the connection terminals inside the gray box.
Asked by: JBird
Your wires should never melt. The only cause I can think of would be if you used a #14 wire and ran more than 15 amps thru it (same for #12 and 20A or #10 and 30A) What wire size are you using and what circuit breaker size?
Answered by: whyshouldInotusemyownname
Date published: 2017-03-03

Is this timer a plug in style? Can this timer be used on a recirculating hot water heater pump

Asked by: smitty
The unit itself does not have a plug. Purchase the correct plug (220) and wire it into the unit. Then wire the unit to the water heater.
Answered by: SRT
Date published: 2016-03-24
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Customer Reviews

40-Amp 240-Volt Electric Water Heater Time Switch is rated 4.4 out of 5 by 52.
Rated 5 out of 5 by from This was a replacement for a model made several years ago that failed after a few years of errati... This was a replacement for a model made several years ago that failed after a few years of erratic running. It was noisy and did not keep time well at all. We needed the same box because of its simplicity and low cost. The installation was a breeze. The company must have made some serious improvements because this one runs quietly and keeps time to near perfection. Looking forward to never replacing this one.
Date published: 2017-01-03
Rated 4 out of 5 by from This is a nice timer. It installs easy and works as advertised. It would be nice if it had seve... This is a nice timer. It installs easy and works as advertised. It would be nice if it had seven day ability. The advertisement on the Home Depot site does not say it comes with trippers and so I purchased trippers for nothing.
Date published: 2016-12-29
Rated 5 out of 5 by from About 9 yrs ago, bought a digital and this type of mechanical electric heater timer for both home... About 9 yrs ago, bought a digital and this type of mechanical electric heater timer for both homes I own. Altho both are easy to hookup, the digital is more time consuming to program. The digital malfunctioned about 5 years ago, replaced with the same and just recently replaced the digital timer went dead (back-up battery still good / reading around 1.4 volts). The old mechanical is still functioning. The downside of the mechanical is when there is a power outage, you needs to reset to the present time which is quite understandable due to it doesn't have a back-up battery. For durability and experience, I chose the mechanical over the digital this time. The digital is fancy with being in the modern times for being multi-functional time on/off and days) but for durability, the mechanical is the way to go (for me).
Date published: 2017-01-31
Rated 4 out of 5 by from Installation is very straght forward and easy to set up and operate. Like the manual lever, aga... Installation is very straght forward and easy to set up and operate. Like the manual lever, again easy to turn on or off at "other" than selected times if needed. The only caution and this Clearly stated in the installation instructions is to Not try and switch the timer on or off manually 30 minutes before or after your set on or off time.
Date published: 2017-06-07
Rated 5 out of 5 by from Our electric company offered to pay half of the price for the H2O heater so why not? I'm not an e... Our electric company offered to pay half of the price for the H2O heater so why not? I'm not an electrician but after watching a couple youtube videos I was able to install this switch without killing myself or burning the house down, the result is a huge difference in our monthly electric bill.
Date published: 2017-02-19
Rated 4 out of 5 by from This timer has been my favorite timer since 1992. I... This timer has been my favorite timer since 1992. I have changed it twice and this time (3rd) the manual override switch became stuck to the cover. I had to adjust the switch handle, to stop it from being hindered by the closing of the cover.
Date published: 2017-05-01
Rated 5 out of 5 by from So far so good I installed it a few weeks ago and it works great. It was easy to install and directions were explicit enough that anyone can understand them.
Date published: 2017-01-03
Rated 5 out of 5 by from The Timer was easy to install! Easy to set off and on times! I think it will save me money in the... The Timer was easy to install! Easy to set off and on times! I think it will save me money in the long run!!
Date published: 2017-04-25
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