Wiring Diagrams - Honeywell PRO TH4110B Installation Manual

PRO TH4110B Programmable Thermostat

Wiring diagrams

Power supply. Provide disconnect means and overload protection as required.
Factory-installed jumper. Remove for 2-transformer systems only.
Use either O or B terminals for changeover valve.
Use a small piece of wire (not supplied) to connect W and Y terminals.
Set fan operation switch to Heat Pump (see page 6) and configure for heat pump (see pg. 8).
Typical 1H/1C system: 1 transformer
Typical 1H/1C heat pump system
Typical heat-only system with fan
Typical 1H/1C system: 2 transformers
Typical heat-only system
Typical cool-only system
5
Remove jumper