521271-UIM-D-1211
Johnson Controls Unitary Products
13
For additional connection diagrams for all Johnson Controls Unitary Products’ equipment refer to “Low Voltage System Wiring” document available
on-line at www.upgnet.com in the Product Catalog Section.
FIGURE 17:
Thermostat Chart - Two Stage AC with Two Stage PSC Furnaces
AC 15A
C
24 – Volt Common
R
24 – Volt Hot
Y1
First Stage Compressor
Y2
Second Stage
Compressor
G
Fan
*DN22H00124
*DP22U70124
THERMOSTAT
E/W1
First Stage Aux. Heat
W2
Second Stage
Aux. Heat
C
24 – Volt Common
Y
First Stage Compressor
Y2
Second Stage
Compressor
G
Fan
*PP32U70124
THERMOSTAT
W2
Second Stage Heat
R
24 – Volt Hot
(Heat XFMR)
RC
24 – Volt Hot
(Cool XFMR)
W
First Stage Heat
Part Number:
S1-2HU16700124
1
(G/L)*(8/9)T
(F/L)*(8/9)T
PT(8/9)
ID MODELS
Part Numbers:
SAP = Legacy
265903 = 031-09168
2
C
24 – Volt Common
R
24 – Volt Hot
W / W1
First Stage Heat
W2
Second Stage Heat
Y / Y2
Second or Full
Stage Compressor
TWO STAGE PSC
FURNACE
G
Fan
TWO STAGE PSC
FURNACE
Y1
Single Stage
Compressor
2
TWO STAGE
AIR
CONDITIONER
C
24 – Volt Common
R
24 – Volt Hot
Y1
First Stage Compressor
Y2
Second Stage
Compressor
External Humidistat
(Optional)
Open on Humidity Rise
24VAC Humidifier
(Optional)
1
Thermostat Installer Setup
0170-System Type-must
be set to 8-2 Heat/2 Cool
Multistage Conventional
Connection of the “C”
terminal, 24-Volt common
is optional when used with
batteries
Connection of the “C”
terminal, 24-Volt common
is optional when used with
batteries
Two Stage Air Conditioner - Two Stage PSC Furnace
TM(8/9)*
449573
