[young707]

I have a 30 yrs old Maple Chase (Robertshaw) 9700 thermostat. It has 6 wires (blue, green, brown, yellow, white, red).
Can you please tell me how should I lebel these wires and what are function for these wires.

According to Robertshaw 9700 installation shows 4 wires G, Y, W, R, it does not match what I have 6 wires (see photo).
http://www.manualsdir.com/manuals/348652/robertshaw-9700i-installation.html?page=2

I found this Honeywell RTH6350D at HomeDepot at $49. Their installation guide shows 5 wires (label as G, Y, W, R, Rc)

https://customer.honeywell.com/resources/techlit/TechLitDocuments/69-0000s/69-2416ES.pdf

Do not know how to wire the new Honeywell thermostat. Any advices are much appreciated.

 

[Bitters]

Blue wired not used, tape it off.
Green goes to G on new stat.
Brown goes to W2.
Yellow goes to Y.
Purple goes to W1.
Red goes to R.

 

[supers05]

Blue wired not used, tape it off.
Green goes to G on new stat.
Brown goes to W2.
Yellow goes to Y.
Purple goes to W1.
Red goes to R.

Exactly right.

Blue is "C" or common. It's not used for that model of stat.

On function 1, set system type to 7. (As per pg. 14 in the above Honeywell manual)

Cheers!

 

[beenthere]

I think thats a brown wire, not purple. Could just be my tired eyes though.

 

[young707]

thank you for your advises and help,

Yes, In Honeywell p. 14, function 1 system type, I have type 7 = Heat / Cool multiple stages (actually, its’ fan just two different speeds – my assumption).

The original Robertshaw (Maple Chase) wiring has 6 wires from left to right
blue (C), Green (G), Brown (W2), Yellow (Y1), White (W1), Red (Rh jumper Rc)

There is no purple wire, but has white wire. I assume this white wire goes to W1 ?

What are the meanings of all these letters W2, Y, W1, R?

 

[Bitters]

Yes white wire goes to W1. R is 24VAC, Y is cooling, W1 is 1st stage heat and W2 is 2nd stage heat.

Beenthere, I guess we were both wrong. My eyes are a little tired too.

 

[young707]

thank you for your help gentlemen. Much appreciated.