Honeywell RTH221B1021/E1 Thermostat User Manual


 
6
Alternate Wiring
If wires will be connected to both R and Rc terminals, remove metal
jumper.
Do not use C or X. Wrap bare end of wire with electrical tape.
If you have a heat pump without auxiliary/backup heat connect O or B,
not both. If you do not have a heat pump, do not connect B. Wrap bare
end of wire with electrical tape.
Place a jumper (piece of wire) between Y and W if you are using a heat
pump without auxiliary/backup heat.
B O G Y
W
NOT
USED
R Rc
M32734
44
7 Install Batteries
Install two AAA alkaline batteries.
Back of thermostat
RTHXXXX
M32707