Timer for block heater?
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Senior User
Joined: Dec 2003
Posts: 133
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From: Taylorsville, KY
Timer for block heater?
Hey guys, I have heard several of ya'll talk about timers for your engine block heaters. Where did you get it or did you make it out of something. I need one cause our utility bills are getting high.
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Joined: Nov 2003
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Personally, most timers you get from your home center are going to be 15 amp, but in reality that won't be a big deal because your outlets in your house/garage are only rated for 15 amps.
The ones I checked out are all rated at least 1750 watts, more then enough to power the 1000 watt block heater on my truck.
Just make sure it has a 3 prong grounding plug in it. Walmart and Home Depot have them for 10 bucks. Walmart had a nice digital one for $15
My problem is the heater is popping the GFCI in my garage. Someone suggested trying a normal outlet without gfi so I will do that.
http://www.intermatic.com/?action=prod&pid=201
Mike
The ones I checked out are all rated at least 1750 watts, more then enough to power the 1000 watt block heater on my truck.
Just make sure it has a 3 prong grounding plug in it. Walmart and Home Depot have them for 10 bucks. Walmart had a nice digital one for $15
My problem is the heater is popping the GFCI in my garage. Someone suggested trying a normal outlet without gfi so I will do that.
http://www.intermatic.com/?action=prod&pid=201
Mike
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Joined: Nov 2003
Posts: 21,285
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From: Nutter Fort, WV
And while you are doing all this remember to get a good (at least 12 guage for 50 feet or less) extension cord. A small wire size will kill your block heater way before it's time.
If you look at your wire to the truck and all the ice and snow is melted around it, then it is to small of a conductor in it.
If you look at your wire to the truck and all the ice and snow is melted around it, then it is to small of a conductor in it.
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Joined: Aug 2003
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From: Québec
Mine is a NOMA for outside, works good. You can also have a block heater that starts and stop by itself, like a thermostat it will turn on when the antifreeze is at -5 Celcius, and turn off when warmer. I do not know who sells them but it is a good system.
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If you feel ambitous and have the money you could pick up a Intermatic 24 hour timer and remote bulb thermostat from somewhere like grainger, mount them on the wall in the garage, hardwire the feed and outlet for 15 amp. Extend the remote bulb capillary outside and have a system that only heats the block at a cretain time period and only when its cold enough. All you need to do is remember to plug it in. Definatly use a #12 extension cord as its good for about 25 amps and will reduce the voltage drop at the heater. System would cost about $135.00 US.
I could dig up grainger part numbers if anyone wants to know them.
Jim
I could dig up grainger part numbers if anyone wants to know them.
Jim
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Joined: Nov 2003
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Man, I like that idea. I think I will start to compile that info. If you got time, fire out what you think part for the remote bulb timer is. I can get the timer bout anywhere.
I am just trying to get it set in my head how to wire it. Does the line go to the timer first or to the bulb? I presume the bulb, but then the timer wouldn't have power to run, therefore it must be the timer first, then the bulb then the outlet. Right?
Thanks,
Mike
I am just trying to get it set in my head how to wire it. Does the line go to the timer first or to the bulb? I presume the bulb, but then the timer wouldn't have power to run, therefore it must be the timer first, then the bulb then the outlet. Right?
Thanks,
Mike
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Joined: Nov 2003
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Mike, use a Grainger part number 4E047 remote bulb tstat, $47.70 in their book and a Grainger 24 hour timer P#2E021 at $48.15in their book. Tstat is rated 22 amps and timer is rated 40 amps.
circuit looks something like this.
!
! 120v L1 Neutral L2 !
! !
! _____ !
! TSTAT TIMER ! 0 ! OUTSIDE !
!---------!/ !--------------! !-------------------!--! !-!-----------------!
! OPEN ON TEMP RISE !____! RECEPTICLE !
! !
Set timer to close contacts(go on) at a time about 3 hours before you need the truck. or as you like.
The typical amperage draw of a 1000 watt heater is 8.3 amps at 120 volt. I could probably write all this up with real drawings and put it in the artical section.
Jim
circuit looks something like this.
!
! 120v L1 Neutral L2 !
! !
! _____ !
! TSTAT TIMER ! 0 ! OUTSIDE !
!---------!/ !--------------! !-------------------!--! !-!-----------------!
! OPEN ON TEMP RISE !____! RECEPTICLE !
! !
Set timer to close contacts(go on) at a time about 3 hours before you need the truck. or as you like.
The typical amperage draw of a 1000 watt heater is 8.3 amps at 120 volt. I could probably write all this up with real drawings and put it in the artical section.
Jim
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
Definitely run to the timer first, then the thermostat, then the outlet for the truck.
You can mount the thermostat outside in a weather proof box above the outlet. This will save you dollars and another hole in you wall and siding.
You just have to watch an see the low temp cut on is low enough for what you want. Any good electrical supply place should have several models.
Just the timer will save you a bunch of dollars, if it is not going to be cold do not plug it in.
If it is going to be below 35 plug it in to the timer, instant defrost upon starting.
You can mount the thermostat outside in a weather proof box above the outlet. This will save you dollars and another hole in you wall and siding.
You just have to watch an see the low temp cut on is low enough for what you want. Any good electrical supply place should have several models.
Just the timer will save you a bunch of dollars, if it is not going to be cold do not plug it in.
If it is going to be below 35 plug it in to the timer, instant defrost upon starting.