Johnson Controls YP9C Series Installation Manual page 14

5750151-UIM-G-0423
Thermostat charts
THERMOSTAT
C
24 – Volt Common
R
24 – Volt Hot
G
Fan
Y1
First Stage
Compressor
W1
First Stage Heat
W2
Second Stage Heat
Y2
Second Stage
Compressor
* or O
(Reversing Valve)
External Humidistat
(Optional) Open on
Humidity Rise
Figure 19: Thermostat chart - single stage air conditioner with modulating furnace
Figure 20: Thermostat chart - two stage air conditioner with modulating furnace (wiring diagram option one)
14
Single Stage Air Conditioner – Modulating Furnace
MODULATING
FURNACE
C
24 – Volt Common
R
24 – Volt Hot
G
Fan
Y/Y2
Full Stage Compressor
W
Modulating Heat
Y1
First Stage
Compressor
O
Reversing Valve
LO COMP
Single stage
Compressor (Out)
HI COMP
Second Stage
Compressor (Out)
DEHUM
Dehumidification
SINGLE STAGE
AIR
CONDITIONER
C
24 – Volt Common
R
24 – Volt Hot
Y1
First Stage
Compressor
A0895-001
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