Question about Ruud UBHC Air Conditioner

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Manual Thermostat replcaement with Programmable Digital unit.

I have a RUUD heatpump/AC unit with manual thermostat.
Inside unit is UBHC-17J11SHG, outside unit is UPMC-030JAZ, thermostat is T874R1434.
New thermostat is Honeywell Vision Pro 8000 series (TH8320U1008).

When I remove the faceplate on the existing thermostat, I see the following wires connected on the left side from top to bottom:
bare wire
Lt. Blue
Black (or Dk. green).
Connected the the mercury thermometer is white, blue and yellow on top.
Connected to the bottom is red and black (or Dk, green),

I need to know what wires go where on the Honeywell wiring block.

James Andrus

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  • Anonymous Mar 26, 2014

    need to know the two wires that connect to battery inside unit that power pump in water tray I took off an cant remember what colour connects to what pole pump will go when connected wires this then that way but maybe one way would make little pump go backwards also when fold up front part to place water bottle back there is little red button on side what does that do ive pushed by hand there is no click in sound rather just like goes in an out with just spring tension resistance no audable change in operation that I can notice ,machine is in stripped state at moment and not sure about this water tray with pump actually functioning properly then pull wires off that battery an forgot what wire went where makes bubling noise which ever way I connect bas as I quoted earlier in writing would it make pump go backwards or some other malfunction reguards MICHAEL RAY



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Hopefully there are markings on the old t-stat as to what terminal is what.
on the honeywell 8000 use the heat pump labeling and then the standard wiring would be
R- red
Y- yellow
B- O/B
C- black
G- green
There should not be a bare wire, it probably just has the insulation stripped back way too far.
You should probably open the furnace and compare the terminal label in the furnace to the wire color. normally yellow and blue pass through the furnace and are wire nutted to wires going to the outdoor unit. In the furnace the white wire will connect to the w or w1 terminal. also, you will need to set the Honeywell stat to have the following parameters.
other parameters that I did not specify, you may read the manual and make your own decision but I recommend factory settings for the other parameters

Posted on Jun 18, 2008


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