Honeywell CT8775A Owner's Manual - Page 9

Table 2. Terminal Designations on Old and New Thermostats. Terminal on Old Thermostat R Rh (see Note 1) 4 V Rc R (see Note 1) W, W1, H Y, Y1, M G, F O B (see Note 3) C (see Note 4) X (see Note 4) B (see Note 3) W2, H2 Y2 Connect to Terminals Connect To Terminals on CT8775A on CT8775C R R (see Note 2) Power Description - W - - - - Do not connect. Rc (see Note 2) W Y G O B (see Note 3) Do not connect. Power for cooling Heat Cooling Fan Changeover in cool. (Single stage heat pump only). Changeover in heat. (Single stage heat pump only). Transformer common Do not continue Do not continue Second stage heat. installation. Call 1-800468-1502. installation. Call 1-800468-1502. Second stage cool. NOTES: 1. If wires were connected to both Rh and R terminals on the old thermostat, remove jumper between R and Rc on the new thermostat and connect Rh to R and R to Rc. 2. If wires will be connected to both R and Rc on the new thermostat, remove jumper between R and Rc. 3. Do not connect both O and B when wiring to a single stage heat pump. Connect O to O. Tape off B with electri- cal tape and do not use. 4. Tape off wire with electrical tape and do not use. 9 69-1676-1