AMX ViewStat Operation/Reference Manual page 28

ViewStat Installation and Wiring
b.
FIG. 15 shows a typical heat/cool wiring schematic:
USE 18-20 GA. THERMOSTAT CABLE. NUMBER
OF CONDUCTORS REQUIRED DEPENDS ON THE
HVAC SYSTEM BEING CONTROLLED
ENSURE HVAC SYSTEM POWER
IS OFF BEFORE WIRING
INDOOR BLOWER/HEAT
2ND
STAGE
AUX.
HEAT
FAN
RELAY
REFER TO THE THERMOSTAT INSTALLATION
SHEET FOR INTERNAL SCHEMATIC, THERMOSTAT
CHECK-OUT PROCEDURES AND OTHER HVAC
WIRING DETAILS
FIG. 15 Typical heat pump wiring schematic
For additional HVAC system wiring diagrams (for Single-Stage Furnace and AC,
Two-Stage Furnace and Two-Stage AC, Roof-Top Unit (Two-Stage Heat and Two-
Stage Cool), Boiler With AC (Two Transformers), and Single Stage Heat Pump
Configurations, refer to the Wiring Diagrams section on page 26.
22
CAUTION!
UNIT
W2
1ST
STAGE
W1
AUX.
HEAT
G
C
24
VAC
R
120
VAC
OUTDOOR HEAT PUMP UNIT
REV
1ST
VALVE STG
HEAT
COMP.
2ND REV
STG VALVE
COMP. COOL
C
R
RSR
RSC
RSB
RSA
REF
B-
B+
A-
A+
B
Red Black
(power) (common)
(from MiniVerter)
ViewStat Communicating Thermostat
RC
RH
O
G
W1
Y1
W2
Y2