Xiamen Smarttek Co. Ltd. PCT503-W Manuel D’Utilisation
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3. Boiler or radiant system with air handler and conventional
cooling or heat pump
Air conditioner or Heat Pump Boiler
For 2 heat and cool if applicable
* For heat pump only
Remove the jumper for RC or RH, switch the DIP switch in the back
of the thermostat to RC if you have connected both RC-wire and
RH-wire to the wall plate, otherwise switch it to the RC&RH side.