835965-UIM-C-0814
10
Johnson Controls Unitary Products
FIGURE 11:
Thermostat Wiring – Single Stage Air Conditioner (with AC control) – Modulating Furnace
– Modulating Furnace
Single Stage Air Conditioner (with AC control)
(Y,L,C)*(8,L)C
T*(8,L)C
T*9C
(Y,L,C)*9C
ID MODELS
Jumper 1 must be set
to “GAS/ELEC”
Y1
First Stage
Compressor
W2
Second Stage Heat
G
Fan
S1-THSU21P1b
THERMOSTAT
R
24 – Volt Hot
W1/O/B
First Stage Heat
C
24 – Volt Common
Jumper 3 must be set
to “GAS”
SINGLE STAGE
AIR
CONDITIONER
C
24 – Volt Common
R
24 – Volt Hot
Y1
First Stage Compressor
Y2
Second Stage
Compressor
SINGLE STAGE
AIR CONDITIONER
External Humidistat
(Optional)
Open on Humidity Rise
C
24 – Volt Common
R
24 – Volt Hot
Y1
First Stage Compressor
MODULATING
FURNACE CONTROL
G
Fan
MODULATING
FURNACE
Y/Y2
Second or Full
Stage Compressor
DHUM
Dehumidification-
Open on Humidity Rise
W
Modulating Heat
Move HUMIDISTAT
jumper to “YES”
if humidistat is to be used.
LO COMP
Single Stage
Compressor (OUT)
O
Reversing Valve
Energized in Cool
HI COMP
Second Stage
Compressor (OUT)
HEATPUMP jumper must
be set to “NO”
A0209-002
