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835965-UIM-C-0814
14
Johnson Controls Unitary Products
FIGURE 15:
Thermostat Chart - Two Stage AC – Variable Speed Furnaces
AC 26B
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
R
24 – Volt Hot
G
Fan
Y1
Single Stage
Compressor
VARIABLE SPEED
MODULATING
FURNACE CONTROL
VARIABLE SPEED
MODULATING
FURNACE
Y/Y2
Second or Full
Stage Compressor
HUM
Dehumidification-
Open on Humidity Rise
W
Modulating Heat
Move HUMIDISTAT
jumper to “YES”
if humidistat is to be used.
24VAC Humidifier
(Optional)
External Humidistat
(Optional)
Open on Humidity Rise
C
24 – Volt Common
R
24 – Volt Hot
Y
First Stage Compressor
Y2
Second Stage
Compressor
G
Fan
*DN22C00124
THERMOSTAT
W2
Second Stage Heat
C
24 – Volt Common
R
24 – Volt Hot
Y1
First Stage Compressor
Y2
Second Stage
Compressor
G
Fan
*DP22U70124
THERMOSTAT
W2
Second Stage Heat
W
First Stage Heat
E/W1
First Stage Heat
Step 1 of Thermostat User
Configuration Menu must
be set to MS 2
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
External Humidistat
(Optional)
Open on Humidity Rise
A0213-002
Relay
ID MODELS
YP9C
LP9C
CP9C
TP9C
YPLC
LPLC
CPLC
TPLC