Gas and Oil Home Heating Furnaces - new t-stat problem

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01-21-01, 09:45 AM
I have a 2 stage heat pump with 1 stage air
Heat/em-heat/air

I trying to replace a honeywell t841a manual t-stat to a lux programmable. when i turn the heat on I blow the 5amp fuse on the air handler control board. here's how I connected the wires

Honeywell-----Lux
X >>>>>>>>>> E
G >>>>>>>>>> G
Y >>>>>>>>>> Y
R >>>>>>>>>> R
O >>>>>>>>>> o
W >>>>>>>>>> W2
B >>>>>>>>>> B

I did notice that the W wire is connected to the W1 in the handler with a reyrn wire from outside to W2. Any help? Please

fjrachel
01-21-01, 10:23 AM
B and O are wrong. You should only have had one of these connected on old and new t'stat. B=reversing valve in heat and O=reversing valve in cool. Your X to E should be disconnected as I believe on the honeywell X is common. On the lux E= em heat, but I'm not sure. It should be with the paper work you got with the Lux.
01-21-01, 04:34 PM
Thamk you for your reply. I did find the problem. with the smallest print available in the installation there was a note regarding the B wire or common. which I removed. all is warm. Thanks