361813-UIM-A-0208
Unitary Products Group
9
FIGURE 9:
Thermostat Wiring – Single Stage Heat Pump - PSC Modulating Furnace (with Hot Heat Pump)
PM9
FC9M
FL9M
C
24 – Volt Common
R
24 – Volt Hot
Y1
Single Stage Compressor
PSC
MODULATING FURNACE
G
Fan
PSC
MODULATING
FURNACE
Y/Y2
Second or Full
Stage Compressor
2
W
Modulating Heat
HP 17A
Single Stage Heat Pump – PSC Modulating Furnace (With Hot Heat Pump Operation)
C
24 – Volt Common
R
24 – Volt Hot
Y1
First Stage Compressor
O
Reversing Valve
Energized in Cool
L
Malfunction Light
G
Fan
*DP32H70124
THERMOSTAT
W1
Second Stage Aux. Heat
E
Emergency Heat
W2
Third Stage Heat
Step 1 of Thermostat
Installer / Configuration
Menu must be set to
Heat Pump 1
C
24 – Volt Common
R
24 – Volt Hot
Y1
First Stage Compressor
O
Reversing Valve
Energized in Cool
L
Malfunction Light
Y2
Second Stage Compressor
G
Fan
*BP21H50124
*BN21H00124
*DP21H40124
*DN21H00124
THERMOSTAT
E
Emergency Heat
W2
Second Stage Heat
B/O Switch on Thermostat
must be in the O position
C
24 – Volt Common
Y1
First Stage Compressor
O/B
Reversing Valve
L
Malfunction Light
Y2
Second Stage Compressor
G
Fan
*DN22U00124
THERMOSTAT
E
Emergency Heat
AUX
Auxiliary Heat
R
24 – Volt Hot
(Heat XFMR)
R
24 – Volt Hot
(Cool XFMR)
24VAC Humidifier
(Optional)
External Humidistat
(Optional)
Open on Humidity Rise
3
Part Number:
S1-2HU16700124
3
O
Reversing Valve
Energized in Cool
C
24 – Volt Common
R
24 – Volt Hot
W1 OUT
First Stage Heat
W2 OUT
Second Stage Heat
Y2 OUT
Second Stage Compressor
Y1
Single Stage Compressor
X/L
Malfunction Light
Y2
Second Stage Compressor
W
Auxiliary Heat
BS
Bonnet Sensor
BSG
Bonnet Sensor
YORKGUARD VI
CONTROL
SINGLE STAGE
HEAT PUMP
Bonnet Sensor
(Optional)
Change FFuel jumper
on the heat pump control
to “ON”
1
H*3
YMB
YZB
OD MODELS
Change Hot Heat Pump
jumper on the heat pump
control to “ON”
Part Numbers:
SAP = Legacy
126768 = 031-09137
18395 = 031-01996
340512 = 031-09178
1
Y2
Second Stage Compressor
Part Numbers:
SAP = Legacy
155941 = 031-09140
2
Thermostat Installer Setup
1-System Type-must be set
to 5 – 2 Heat/1 Heat Pump
Thermostat Installer Setup
2-Changeover Valve-must
be set to 0 – O/B terminal
Energized in Cooling
ID MODELS
