Installation guide

ObserverCommunicatingWallControlFour-WireConnectionWiringDiagrams
Figure 11
(See Thermostat Installation Instructions for specific unit combinations)
Variable Speed
Wall Control Furnace/Fan Coil Outdoor
_ Green _
Yellow_,q
Green
Yellow
White
Red
.Optional Remote .._
Room Sensor Humidifier
-- Connection
HUM
COM
LEGEND
-- 24V FACTORY WIRING
..... 24V FIELD WIRING
FIELD SPLICE CONNECTION
J FVM Fan Coil Wiring With
Figure 12 Two-Stage Air Conditioning
Indoor Control Fan Coil
Heat Stage 2
Heat Stage 11_'
Cool Stage 1 f'_"
Cool Stage 2 I--_-_.
Fan
24 VAC Hot
Dehumidify fD"_'_.
24 VAC Comm
Humidify
RVS Heatingr__
Outdoor t( _
BDD
BDD
BDD
BDD
I Y/Y2 II
-J-_l
.4--_1
,-I, H i i
Two-Stage Air Conditioner
I
Remove J2 Jumper
For Heat Staging
__ Humidifier
/ (24VAC) /
__ Outdoor
/ Sensor I J
Variable Speed Furnace with
Figure 13 Two-Stage Air Conditioner
ICP Thermostat
Variable Speed
Furnace
. __1-"_
__1--_-" _ __
--E3
--12D
D HUM
OUTDOOR
SENSOR
Two-Stage
Heat Pump
421 01 1702 04 specificationssubjectto change without notice. 13