PS4000/PS5000 Touchscreen Programmable Thermostat
POWER THE THERMOSTAT
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You can choose from three methods to power the thermostat.
·
Batteries only (AA alkaline).
·
24V AC common wire only.
·
24V AC common wire with battery back-up (AA alkaline).
Wiring 24V AC Common
·
Single Transformer System:
Connect the common side of the transformer to the C screw terminal of the
thermostat wall plate. Leave the metal jumper wire in place between RC and R.
·
Two Transformer System:
Connect power side of "Cooling" transformer to RC terminal. Remove factory
installed jumper. Connect common side of "Cooling" transformer to the compressor
contactor, relay, etc. Connect power side of "Heating" transformer to the R terminal.
Connect the common side of the Heat relay to the C terminal.