Honeywell PRESTIGE THX9321 System Installation Manual page 10

System Installation Guide
EIM wiring guide — conventional systems
Typical wiring of a conventional system with up to 3-stage heat and 2-stage cool
with one transformer.
POWER
COOL
STATUS
LEDS
1
See guides on following pages for thermostat wiring and geothermal radiant heat wiring.
2
Wire a maximum of 2 sensors using the S1 and S2 terminals. See ISU 5000-6190 for options.
3
Remove jumper(s) if using separate transformers.
4
See Economizer wiring section.
See following pages for additional thermostat wiring guidlines for heat pumps,
geothermal systems and optional Economizer.
69-2490—03
69-2490_B.indd 10
EIM
TO THERMOSTAT
HEAT
FAN
U1
U2
U3
SENSORS
R
C
CONV
W
W2
W3
A
4
1
S1 AND S2 TERMINALS
2
10
FURNACE
TRANSFORMER
24 120
VAC VAC
HEAT STAGE 1
HEAT STAGE 2
HEAT STAGE 3
G
FAN
COMPRESSOR
Y
STAGE 1
COMPRESSOR
Y2
STAGE 2
JUMPERS
3
CONNECT OPTIONAL
SENSORS TO
(MAX. 2 SENSORS)
MCR32945
7/13/2011 1:41:54 PM