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Tim, finally getting back to you. No, no other model numbers. I am not at the house now but I did take a photo of the 24v terminal strip and the wiring diagram. There are instruction to remove the jumper from the blower relay terminal 4 and 6. It refers to using terminal 4 for cooling and 6 for heating. It does not have a "y" on the 24v terminal strip.
I hope this is what you need. Is what I really need is hooking up the 24v from the condenser and thermostat.
Good Morning Tim,
First this furnace is so old that it does not have a circuit board.
The terminal strip is labeled as follows:
R = red wire from thermostat
G = blue wire from thermostat
O = no wires
W = both W1/W2 & W are jumpered, black wire (not sure where it is comming from as I am not at the furnace) connected to W1/W2 along with white wire from thermostat and yellow wire connected to W (again not at the furnace) but they go to the blower relay.
E = no wire in or out
C = no wire in but out to terminal 1 on BR
OTC = black wire in (not sure from where) no wire out
OT-1 = yellow wire in (not sure from where) no wire out
OT-2 = no wire in or out
OT- 3 = no wire in or out
The otc connection show that if anything is connected it goes to the EHR
The thermostat wires only have 3 wires but there are 2 of them. One is not connected to anything(the other is connected as mentioned above) so I was going to take the red wire and connect it to the y connection at the thermostat but did not know where to connect it at the furnace. Now is I understand you correctly, I can connect that right to the 24v wire coming from the condenser and connect the other to the c terminal.
There is a note on the diagram reads as follows: Remove black jumper wire from blower relay terminals 4 & 6 for 2 speed operation. (Terminal 4 for cooling and terminal 6 for heating).
That is the only reference to cooling on this diagram.
I hope that I am on the same page as you as this person is a good friend but really is to cheap to update his furnace and has asked me to hook up the a/c. I don't want to hook it up and blow something out and now I am stuck for a new unit.
Can you please add my work email [email protected] so I receive it at both accounts?
After I saw pics, i realized there was not a board as we have in today's furnace, I was referring to the little terminal board (strip). The 4 and 6 on the relay just control what speed blower runs on in heat and cool modes.Sounds like they have a jumper between 4 and 6 so we are using same speed on heat and cool. Going to outdoor unit , all you need is a Common from the indoor transformer and the hot coming straight from Y at thermostat. The Y is really the opposite wire from transformer which goes to R at thermostat. Thermostat is just like a light switch.When you have thermostat off, the circuit is broken to outdoor unit, but when you turn to cool. the circuit closes and goes to the outdoor unit.
By the way JA will not let us communicate outside of the site.Emails and phone numbers are blocked.
Tim, so if I am following you right, the wire from the r terminal/thermostat goes to the #4 lead on the transformer. I would connect the y to the #1 lead of the transformer which goes to the fuse link of heater element #1.(I don't think this is right because of the higher voltage. In this case with no circuit board which for the y connection on the board acts like spicing 2 wires together, I would think I could run the y wire right to the condenser. Correct me if I am wrong). Then just connect the other wire to the c on the terminal strip. I am just trying to be extra cautious on this job seeing my diagram really does not show anything.
Tim, thanks. That is really what I was trying to say in my previous post in prentices, but you are better with words than I am. That should be all, I was on the right track all along, just needed to get it confirmed. rather be safe than sorry.
Tim, just a follow up, all went well. Everything works great. The a/c side of it was good, but the blower would not run. This furnace has 2 60amp breakers and three fuse links. Two of the fuses were blown. Like I said a old unit. I think it was made to heat Noah's Ark.
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