TH8320 Install Help


  #1  
Old 02-07-09, 08:04 AM
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TH8320 Install Help

I am replacing a Honeywell T8112 with a Th8320U. Need a little wiring / setting help.
HVAC unit is a TRANE Heat pump with a gas auxiliary heat.

Four wires come out of the wall. Red, White, Yellow, Green.

Red, Yellow, and Green are landed on R, Y, and G terminals on the TH8320. Have tried the White wire on W, Aux, and Aux jumpered to E.

Have tired different settings for 170 without any luck.

I am pretty sure that the white wire should be on Aux with a jumper to E, but am not sure about the program settings.

Can anyone make a good educated suggesting to me.

Mike
 
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Old 02-07-09, 10:53 AM
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You are going to need more than 4 wires for heat pump.. Are you sure you have a heat pump?

Follow the t-stat wire from the wall to the furnace... Does it go right to the furnace, or does it go to a board, then to the furnace? If it goes to the board, you have a duel fuel board.
 
 

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