Johnson Controls Hx 3 S1-THXU430W - Page 74

5407934-UIM-C-1119
74 Johnson Controls Ducted Systems
DUAL FUEL SYSTEMS
(Furnace and Heat Pump continued)
2-Stage Furnace
INDOORTHERMOSTAT
2-Stage HP Heat AND Cool
2-Stage Gas Heat
R
C
W
W1 out
W2 out
Y2 out
Y1
R
C
G
W1
W2 W2
Y1
Y2
Y2
24 VAC
Outputs
R
C
G
W1
Y1
Y/Y2
O
O
2-Stage HP
FFuel Jumper = ON
OUTDOOR
O/B
Modulating Furnace
INDOORTHERMOSTAT
2-Stage HP Heat AND Cool
Single Stage Gas Heat
2-Stage HP
FFuel Jumper = ON
OUTDOOR
R
C
Y1
R
C
G
W1
W2 W2 out
Y1
Y2
24 VAC
Outputs
R
C
G
W
Y1
O
W
W1 out
Y2 out
Y2
Y/Y2
O/B
Outdoor Equip Type = External Dual Fuel when HP
uses dual fuel logic, or external fossil fuel kit.
A1240-001