York Affinity PC9, Technical Manual

036-21671-001 Rev. A (0106)

6

Unitary Products Group

THERMOSTAT CHART - TWO STAGE AC

AC20

2 Stage Scroll A/C w/Modulating Furnace, 2 Stage Cooling Ready - P(C/M)8/9

G

Fan

Connection of the "C" 

Termainal, 24-Volt 

Common, is optional 

when used with batteries

Thermostat Installer Setup 

Number 1 - System Type - 

must be set to 8 - 

1 Heat/2 Cool Conventional

Connection of the "C" 

Termainal, 24-Volt 

Common, is optional 

when used with batteries

C

24-Volt Common

THERMOSTAT

*PP32U70124

E2/P Switch must be in 

the E2 position and the 

Humidistat Jumper on 

CFM Control must be in 

the 'YES' position for 

Dehumidification

THERMOSTAT

*PP32U71124

*PP32U72124

G

Fan

C

24-Volt Common

Y1

First Stage Cool

DHM

Dehumidistat

Step 1 of Thermostat User 

Configuration Menu must be set 

to MLTI STG

Step 16 of Thermostat User 

Configuration Menu must 

be set to ON to use 

Comfort Alert Features

HM

Humidistat

24V HUMIDIFIER

(Optional)

W

First Stage Heat

E/W1

First Stage Heat

W

Heat (Modulating)

G

Fan

L

Malfunction Light

W2

Second Stage Heat

Comfort Alert

Interface

HUM

Dehumidification - Open on Humidity Rise

Y1

First Stage Cool

Y2

Second Stage Cool

W2

Second Stage Heat

Y2

Second Stage Cool

Y

First Stage Cool

E/W1

First Stage Heat

Y2

Second Stage Cool

R

24-Volt Hot

R

24-Volt Hot

R

24-Volt Hot

Y2

Second Stage Cool

Y/Y2

Single/Second Stage Cool

THERMOSTAT

THERMOSTAT

THERMOSTAT

*DN22C00124

*DP22U70124

*DN22U00124

Y1

First Stage Cool

C

24-Volt Common

C

24-Volt Common

TWO STAGE

AIR CONDITIONING

MODULATING

FURNACE CONTROL

Y1

First Stage Cool

C

24-Volt Common

G

Fan

C

24-Volt Common

Y

First Stage Cool

W2

Second Stage Heat

E/W1

First Stage Heat

RC

24-Volt Hot (Cool XFMR)

C

24-Volt Common

Y2

Second Stage Cool

Step 1 of Thermostat 

User Configuration Menu 

must be set to MS 2

R

24-Volt Hot

G

Fan

W2

Second Stage Heat

Connection of the "C" 

Termainal, 24-Volt 

Common, is optional 

when used with batteries

G

Fan

Connection of the "C" 

Termainal, 24-Volt Common, 

is optional 

when used with batteries

Thermostat Installer Setup 

Number 15 - Compressor 

Protection - must be set to 5

R

24-Volt Hot (Heat XFMR)

Y

First Stage Cool

R

24-Volt Hot

Thermostat Installer 

Setup Number 0170 - 

System Type - must be 

set to 8 - 2 Heat/2 Cool 

Multistage Conventional

Y2

Second Stage Cool

R

24-Volt Hot (Heat XFMR)

RC

24-Volt Hot (Cool XFMR)

E/W1

First Stage Heat

W2

Second Stage Heat