292278-UIM-A-0108
Unitary Products Group
11
FIGURE 7:
Thermostat Chart – Two Stage AC - Variable Speed Modulating Furnace
Optional Harness
AC 26C
Two
Stage Air Conditioner – Variable Speed Modulating Furnace
TWO STAGE
AIR
CONDITIONER
C
24 – Volt Common
R
24 – Volt Hot
Y1
First Stage Compressor
Y2
Second Stage
Compressor
C
24 – Volt Common
Y1
First Stage Compressor
L
Malfunction Light
Y2
Second Stage
Compressor
G
Fan
*PP32U71124
*PP32U72124
THERMOSTAT
R
24 – Volt Hot
W2
Second Stage Heat
DHM
Dehumidification
HM
Humidistat
Step 1 of Thermostat User
Configuration Menu must
be set to MLTISTG
E/W1
First Stage Heat
24VAC Humidifer
(Optional)
C
24 – Volt Common
R
24 – Volt Hot
Y1
Single Stage Compressor
VARIABLE SPEED
MODULATING
FURNACE CONTROL
G
Fan
VARIABLE SPEED
MODULATING
FURNACE
Y/Y2
Second or Full
Stage Compressor
HUM
Dehumidification-
Open on Humidity Rise
W
Modulating Heat
Part Numbers:
SAP = Legacy
171334 = 031-09153
1
1
Move HUMIDISTAT
jumper to “YES”
if humidistat is to be used.
FL9C
FC9C
PC9
ID MODELS
Comfort Alert Interface
(two pin connector)
E2/P Switch must be in the
E2 position
Step 16 of Thermostat
Installer Table Menu
must be set to ON to use
Comfort Alert Features
Only applies to
*PP32U72124
