[PDF] 69-1714 - TH6110D Programmable Thermostat Installation To wire the thermostat for AC power, connect the common side of the cooling transformer to the “C”terminal as shown at left. Important: Remove R/Rc jumper for 2-transformer systems only.(See wiring diagram on page 5.) Connect common side of transformer to “C” terminal Install batteries in back of thermostat (optional if AC powered HONEYWELL FOCUSPRO 5000 SERIES INSTALLATION Page 1 FocusPRO Non-Programmable ® 5000 Digital Thermostat Series Installation Instructions Wallplate installation Remove the wallplate from the thermostat, then follow directions below for mounting. 1. Remove battery holder. 2. Pull here to remove wallplate from new thermostat. 3. Pull wires through wire hole. 4.