835965-UIM-C-0814
Johnson Controls Unitary Products
11
FIGURE 12:
Thermostat Chart - Two Stage AC – Two Stage Variable Speed Furnaces
24VAC Humidifier
(Optional)
External Humidistat
(Optional)
Open on Humidity Rise
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)
C
24 – Volt Common
Y
First Stage Compressor
Y2
Second Stage
Compressor
G
Fan
*DN22U00124
THERMOSTAT
W2
Second Stage Heat
R
24 – Volt Hot
(Heat XFMR)
RC
24 – Volt Hot
(Cool XFMR)
W
First Stage Heat
W
First Stage Heat
TWO STAGE
AIR
CONDITIONER
C
24 – Volt Common
R
24 – Volt Hot
Y1
First Stage Compressor
Y2
Second Stage
Compressor
Connection of the “C”
terminal, 24-Volt common
is optional when used with
batteries
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
Thermostat Installer Setup
1-System Type-must
be set to 6-2 Heat/2 Cool
Multistage Conventional
Thermostat Installer Setup
15-Compressor Protection
-must be set to 5
C
24 – Volt Common
R
24 – Volt Hot
Y1
Single Stage
Compressor
TWO STAGE
VARIABLE SPEED
FURNACE CONTROL
G
Fan
TWO STAGE
VARIABLE SPEED
FURNACE
W/W1
First Stage Heat
Y/Y2
Second or Full
Stage Compressor
W2
Second Stage Heat
O
Reversing Valve
X/L
Malfunction Light
DHUM
Dehumidification
Move DHUM
jumper to “YES”
if humidistat is to be used.
ID MODELS
AC 24A
Two
Stage Air Conditioner – Two Stage Variable Speed Furnace
External Humidistat
(Optional)
Open on Humidity Rise
Relay
A0210-002
TM8V
TM9V
