Wiring Diagram Needed older overhead shop furnace


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Old 03-17-08, 03:00 PM
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Wiring Diagram Needed older overhead shop furnace

Janitrol
Standing Pilot
70 BTU input
56 BTU output
size and Model plate = 68-070-8
Serial 4667-4

I picked this up at an auction. Seems in very good shape for its' age. Before I hook it up, I want to make sure all the wiring is correct. No wiring diagram.

There are two power wires
two wires for the fan motor
two wires going into the transformer
4 wires coming out of the cabinet (limiter switch)

The gas valve has three terminals.

I need to know the wiring diagram and also where the thermostat hooks up to.

Thanks.
 
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Old 03-18-08, 06:04 AM
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Originally Posted by samahi72 View Post
Model plate = 68-070-8
Serial 4667-4
Must be an older unit since I am not able to find anything on line on this model #.

Before I hook it up, I want to make sure all the wiring is correct. No wiring diagram.
Are all the wires in place?

There are two power wires.
two wires for the fan motor
two wires going into the transformer
Is the wire from the fan motor going else where?

4 wires coming out of the cabinet (limiter switch)
One limit should be going to the fan motor, and other to the gas valve.

The gas valve has three terminals.
2 are use most of the time, one wire going to t-stat, other wire going to the limit, then from limit to transformer.
 
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Old 03-18-08, 06:21 AM
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Originally Posted by Jay11J View Post
Must be an older unit since I am not able to find anything on line on this model #.


Are all the wires in place?


Is the wire from the fan motor going else where?


One limit should be going to the fan motor, and other to the gas valve.


2 are use most of the time, one wire going to t-stat, other wire going to the limit, then from limit to transformer.
Some of the wires are loose and some were tied together. The power cord is missing at this point. So before I start connect wires, I want to make sure it is correct.
Any way you could draw me a little wiring diagram or tell me where to look for one? I have hunted and hunted on the internet and can't find one.

A little more information, I don't know if the transformer is a 12 or 24 volt but on the 12/24 volt side one of the terminals is labeled R load and the other just has the letter C on it.

On the gas valve the 3 terminals are labeled
TR
TH
and the third has THTR on it.

Thank you so much for any help you can give me.
Steve
 
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Old 03-18-08, 07:09 AM
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I'll try to get something drawn out later on today.. If not today for sure in a couple of days.
 
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Old 03-18-08, 07:19 AM
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Originally Posted by Jay11J View Post
I'll try to get something drawn out later on today.. If not today for sure in a couple of days.
you da man. thank you so much.
 
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Old 03-18-08, 04:40 PM
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One limit should be going to the fan motor, and other to the gas valve.

Do not wire limit into fan circuit. I'm sure Jay made a typo
 
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Old 03-22-08, 08:11 PM
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Post pictures, the more the better.
Clear close ups that would allow one to see the various components and its wires...and a pic from a bit of a distance where one could see the entire unit with the service door removed (too see the guts - the various parts).
 
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Old 03-23-08, 05:47 AM
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Pflor made a good point.. I was just going to start drawing out the system. but not knowing for sure what you got there, I may draw it wrong.
 
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Old 03-23-08, 08:44 PM
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What I do: Make the fan run, wire 120 volts. Now add a fan switch to control on/off of fan. Make the transformer hot( parallel circuit with fan, 120 volt side), Now add a gas valve, need to control gas valve, add a t'stat, need to add a limit to low voltage circuit, add a limit. Each time a component is needed, just break one wire to add. I find this easier then trying to figure out what goes where when you don't have a schematic. OR hire a dealer to take a look at the condition of the unit and wire it up.
 
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Old 03-24-08, 06:40 AM
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I don't know how to attach a picture of it, but I did draw out a sketch with all the componets identified and numbered. Can you either send me an email so I can send you the sketch or tell me how to post a sketch or picture on this site?
Thanks for all the help.
Steve
 
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Old 03-24-08, 08:03 AM
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adding pics to the forum

Attaching pics is very easy to do, just sign-up at this site:
http://photobucket.com/
or at this site:
http://www.freeimagehosting.net/

Anything you can scan (files with a jpeg format) could easily be uploaded to one of these sites and then attached to the forum.

Give it a shot, you'll be glad you did so.
 
 

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