Bryant Preferred T6-PRH01-B Installation Instructions Manual page 17

6. Match and connect equipment wires to proper terminals of each connector
block, being careful not to over tighten the screws. Correct polarity must be
observed when connecting the two wires from the Equipment Control
Module to the Thermidistat Control mounting base. If wires are connected
incorrectly, the Display Module will not operate. See Fig. 8, 9 and 10.
Fig. 8 - - Control Module Wiring Guide
Red is V+
S
Black is Vg
S
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