8
Guide 1: Install the thermostat
with a C-wire
Step 1. Remove the old thermostat base
Unscrew the old thermostat base from the wall, gently pull it out and ensure the
wires will not fall back into the hole.
Note:Do you have a C wire connected to your old thermostat?
YES
→
Guide 1. NO
→
Guide 2.
Step 2. Attach the base of PCT503 to the wall
Bundle and insert the wires through the hole of the thermostat base, then attach
the base to the wall with the screws.
