Black & Decker BDXCTSH1 Installation & Operation Manual page 10

INSTALLING THE THERMOSTAT
ATTACH WIRING
To insert a wire, flip up the locking lever that corresponds to the
labeled wire socket and slide the wire into the socket. Once the
wire is inserted, flip the lever down to lock the wire in position.
Pull gently on each wire after the locking lever is closed to make
sure it is secure. Inspect the wires for oxidation and integrity.
NOTICE: A factory supplied jumper is provided between RC and RH.
This should be removed in two transformer systems (See Appendix A).
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