AMX ViewStat - Manual (Page 34)

ViewStat Installation and Wiring
28 ViewStat Communicating Thermostat
Roof top unit (two-stage heat and two-stage cool) configuration.
FIG. 20 Roof top unit (two-stage heat and two-stage cool) configuration
ViewStat
(from MiniVerter)
Black
(common) Red
(power)
IMPORTANT! The B terminal is for reversing valve-heat. DO NOT connect the B
terminal to the common side of the transformer.