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Can you use a plug in timer to switch your storage heater on during the cheap rate electricity

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Generally NO.
But...it Depends on amp rating of timer, wattage of water heater, and line voltage.
Look at label on side of heater for watts.
Electric water heater will work on any voltage.

1) Start with 120 Volt outlet::
Volts x amps = watts
Watts divided by volts = amps
Let's say outlet is 120Volts. Lets say water heater is rated 4500 watts.
4500 divided by 120 = 37 amps
There is NO plug-in timer rated for 37 amps.

Let's say water heater is rated 900 watts.
900 divided by 120 volts = 7.5 amps

Yes. The Intermatic HB113 timer will handle up to 8 amps.
http://waterheatertimer.org/Intermatic-timers-and-manuals.html#appliance

2) 240 Volt outlet
Same calculations as above.

1900 watt element divided by 240 volts = 8 amp.
Yes, the Intermatic HB112 timer will safely handle that element.

3) Here are some water heater timers:
http://waterheatertimer.org/Compare-13-electric-water-heater-timers.html

4) Here are some off-peak water heater ideas.
http://waterheatertimer.org/Off-peak-water-heater-ideas.html

Posted on Nov 01, 2012

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I moved into a flat with newlec NLSH24AN HEATER N NO INSTRUCTION. ..HELP


Hi Sharon,
This should be relatively easy.
You have storage heaters that only take in the hear during cheap rate electricity (at times you cannot change - typically between 00:00 and 07:00 but times vary - ask your electricity supplier).
.
The controls of an electric storage heater normally consist of two
dials to be found under a flap on the heater.

The input dial, sometimes known as the charge or overnight dial.
This control sets the amount of heat to be stored during the night.
It is best to be set on a seasonal basis: medium for
autumn/spring, high for winter.
If you find that you run out of heat before the end of the day,
and the Input is not on maximum, turn it up to store extra for the
following day.

The Output Dial sometimes known as the room temperature or boost dial.
This dial controls the amount of warm air or convected heat given out during the day. It opens and closes.

Nov 24, 2014 | Heating & Cooling

1 Answer

Creda storage heater manual


I'm not a heating expert, but according to the information I could find, Economy 7 utilizes cheap electricty at night, during off-peak hours (7 hours) between midnight and 7AM. Economy 7 costs about 4p per unit compared to peak electricity, which is about 10 to 15p per unit. If you do not have Economy 7, you can request it FREE of charge from your electricity provider. You will either have one meter with two readings or two separate meters. A two tariff electric meter will record the electricity used during off peak times, so it can be billed, separately, at a lower rate. If you have two meters, one meter controls on peak daytime electricity and the other controls your night time economy 7 electricity.

I would need to know what model Creda heater you have installed in order to determine how energy efficient it may be. I also will need the model so I can determine operating instructions. If you need further assistance, please post back and let me know. I hope this helps.

Nov 15, 2011 | Heating & Cooling

1 Answer

I bought the heavy duty appliance timer SA110, 15 amps for my hotwater solar heater. I followed the instuctions and the timer never worked. I bought this timer for the pump the pumps the water from the...


It sounds like you have the timer set correctly.
Manual says to set Master switch to ON position to make settings
Timer has lifetime warranty

Open following link to identify timer and download manual:
http://waterheatertimer.org/Sylvania-timers-and-manuals.html

This timer is rated 120Volt 1800W incandescent 1/2 HP
If your pump rating plate shows excess of 1/2 HP, then this timer is not heavy enough.
Timer comes with lifetime warranty against workmanship, which is far superior than any other timer I've seen on the market, and I test and research timers each day.

Manual says to set Master switch to ON position to make settings.
After settings are made, manual says to move Master switch to Timer for timed functions, as you have done

Next thing to look for: if timer dial rotates as time passes, and keeps correct time.

The timer dial is a clock. The segments located around dial are pushed down or pushed up to control on-off operation.
As the dial rotates, the segments push a switch that turns Load on-off.
If you want timer ON for 2 hours, then you push down 8 consecutive segments.
If you want timer ON for 8 hours, then you push down 32 consecutive segments.

Plug ordinary lamp into timer, and turn lamp ON, and then manually rotate timer dial to see if lamp turns on-off. This will give you a baseline for timer operation, and then you can assess if the motor has suddenly malfunctioned, or breaker is tripped, etc.

Intermatic makes a heavy-duty plug-in timer, and the ratings are identical to your Sylvania SA110
http://www.intermatic.com/products/timers/consumer%20outdoor%20timers/electromechanical%20timers/hb31r.aspx

Apr 16, 2011 | Sylvania SA110 15 Amp Heavy Duty Appliance...

2 Answers

I want to add an under-counter auxiliary water heater to my 15A dishwasher circuit. I need to install some sort of relay to cut out the water heater when the dishwasher is being run, to avoid overloading...


If I understand correctly you have 15 amp breaker with 14gauge wire.
Total watt capacity of 15 amp breaker is recommended at 80% rated load = 12 amps

You want to connect two appliances to same 15 amp line.
1) You have 6 amp Dishwasher that draws 720 Watts
2) You have under the counter water heater with 1500 Watt element that draws 12.5 amps.
3) Combined load is 18.5 Amps and 2220 Watts, approximately
So you do not want dishwasher and water heater turned on at same time.
Makes good sense.

Solutions:
> Easiest thing would be to put water heater on ordinary wall switch located inside sink cabinet.
Back when garbage disposals first came out, garbage disposal switch was inside sink cabinet. You opened cabine door and flipped the switch.
> Next solution would be to put water heater on a timer located under the sink. There are different timers. In-wall timers and box-type

In-wall timer would need relay/contactor
A battery operated timer like the ST01C would not need to be reset after power outage
http://waterheatertimer.org/Programmable.html
Here are instruction pages for selecting and installing the relay/contactor.
http://waterheatertimer.org/H230A.html
http://waterheatertimer.org/Install.html
Add a comment any time.

Box-type timer like T101 120Volt timer. This timer needs no relay/contactor.
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T101
Timer needs to be reset after power outage, but operates on ordinary 120V power, and is simple to install.

> There is no easy way to wire the dishwasher and water heater together so one is certain not to operate when other is turned on. There are likely electronic control panels for that project. But since you know the hours when dishwasher is likely to be ON, then set water heater timer to turn OFF during those hours. Water inside tank will stay hot for a couple hours, so there is no loss.

It sounds like you are a solid electrician.
If needed, add comment any time for more assistance.

Dec 14, 2010 | Rheem 2.5 Gallon Electric 120V Water...

1 Answer

Do not know how to use Theben time switch.


I have theben timer sul181h. How to set it for lighting automatically at 6p.m. and stopping at 9p.m.?

Apr 30, 2010 | Hardware & Accessories

2 Answers

Zanussi ZJD 125 on a timer switch


No prob, the washer never draws the full 3kw at any one time.
Plz rate this solution.
thanks.

Dec 18, 2008 | Zanussi WJS1265W Front Load Washer/Dryer

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