Honeywell Wiring Assistance

arghh

Hello all, thank you for your help in advance. I am upgrading a clients Honeywell CT3500 to a Honeywell RTH7500. I took the CT3500 off the wall and there were 7 connections active:
R, RC, O, W, Y, G, B
I then noticed that the Honeywell RTH7500 has different connections, they are:
R, RC, W, Y, G, C, W2, Y2

As you can see, there is a direct match for everything but the O and B. The only O and B on the RTH7500 is on the "heat pump" side and not the conventional. They do NOT have a heat pump. I am quite confused on how I need to wire this. Any help would be greatly appreciated!
Thank You!

mickeyco

Ask the guy you're assisting, fe, fi, fo, fum, me thinks I smell a homeowner.

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Some people climb mountains. I take out the trash. But we both do it for the same reason.

mdshunk

Ask your boss.

arghh

The boss is on Vacation (labor day weekend). I just help him out a few days a month and he asked me to do a few minor things and I wanted to do my best.

sorry that I am learning this the hard old fashioned way, seems that doesn't go well here. Didn't mean to try and look to other 'experts' as it seems to offend you.

btw, I am 14, the fact I even know as much as I do should impress you as I have been interested in this for a long time and finally got to be a JA this summer. the only home i 'own' is my 4 bedroom walls at my parents.

Nathan

14? Thread closed.

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Nathan

"He is no fool who gives what he cannot keep to gain that which he cannot lose." - Jim Elliot