290982-UIM-C-0907
8
Unitary Products Group
For additional connection diagrams for all UPG equipment refer to “Low Voltage System Wiring” document available online at www.upgnet.com in the
Product Catalog Section.
FIGURE 8:
Thermostat Chart - Single Stage AC with PSC Air Handler
AC 1A
Single Stage Air Conditioner
– PSC Air Handler
C
24 – Volt Common
Y
Compressor
SINGLE STAGE
AIR CONDITIONER
SINGLE STAGE
AIR CONDITIONER
HM1
Humidistat
Y
Full Stage Compressor
G
Fan
*PP11C70224
THERMOSTAT
RH
24 – Volt Hot
(Heat XFMR)
RC
24 – Volt Hot
(Cool XFMR)
W
Full Stage Heat
Clipping Jumper W914 for
electric heat on thermostat
is not necessary
MA
SHP
AHP
ID MODELS
Other Part Numbers:
SAP = Legacy
265902 = 031-09167
2
Part Numbers:
SAP = Legacy
159480 = 031-09156
1
COM
24 – Volt Common
R
24 – Volt Hot
W2
Second Stage Heat
O
Reversing Valve
Energized in Cool
X/L
Malfunction Light
HUM
Humidity Switch
Open on Humidity Rise
PSC
AIR HANDLER CONTROL
G
Fan
PSC
AIR HANDLER
1
EAC(24 VAC out)
Electronic Air Cleaner
HUM OUT
(24 VAC out)
Humidifier
Y1
Single Stage Compressor
Y/Y2
Second or Full
Stage Compressor
W1
First Stage Heat
24VAC Humidifier
(Optional)
24VAC
Electronic Air Cleaner
(Optional)
Y
Compressor Contactor
SINGLE STAGE
AIR
CONDITIONER
SINGLE STAGE
AIR CONDITIONER
Move HUM STAT
jumper to “YES”
if humidistat is to be used.
Refer to AH documentation
for W1 and W2 electric
heat staging options.
