Honeywell Prestige THX9321 System Installation Manual page 10

System /nstallation Guide
ElM wiring guide -- conventional systems
Typical wiring of a conventional system with up to 3=stage heat and 2-stage cool
with one transformer.
"-POWER r--m
HEAT r"_
COOL
FAN
U1 r-_
U2
_ U3 r==l
TO TH ERMOSTAT
SONV
iw
W3-
Y2
_______ _ _-
U3
U2
tic-
!
FURNACE
TRANSFORMER
=
____J C ONs_EO20_sT
Sl AND $2 TERMINALS
See guideson following pages for thermostatwiring and geothermal radiant heatwiring.
A Wire a maximumof 2 sensorsusing the $1 and $2 terminals. See ISU 5000-6190for options.
A Removejumper(s) if using separatetransformers.
,_ See Economizerwiring section.
See following pages for additionalthermostatwiring guidlinesfor heat pumps,
geothermalsystems and optional Economizer.
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