361813-UIM-A-0208
10
Unitary Products Group
FIGURE 10:
Thermostat Wiring – Single Stage Heat Pump - Variable Speed Air Handler (with Hot Heat Pump)
COM
24 – Volt Common
R
24 – Volt Hot
W1
First Stage Aux. Heat
W2
Second Stage Aux. Heat
Y1
Single Stage Compressor
Y/Y2
Second or Full
Stage Compressor
O
Reversing Valve
Energized in Cool
X/L
Malfunction Light
HUM
Dehumidification-
Open on Humidity Rise
VARIABLE SPEED
AIR HANDLER CONTROL
G
Fan
Move the MODE
jumper to “HP”
Move the HUM STAT
jumper to “YES”
if humidistat is to be used.
VARIABLE SPEED
AIR HANDLER
2
AV
ID MODELS
SV
MV
EAC (24VAC out)
Electronic Air Cleaner
Refer to AH documentation
for W1 and W2 electric
heat staging options.
HUM OUT
(24VAC out)
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)
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
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
Part Numbers:
SAP = Legacy
159481 = 031-09157
2
External Humidistat
(Optional)
Open on Humidity Rise
3
24VAC Humidifier
(Optional)
24VAC
Electronic Air Cleaner
(Optional)
Y2
Second Stage Compressor
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
HP 18A
Single
Stage Heat Pump – Variable Speed Air Handler (With Hot Heat Pump Operation)
Second stage auxiliary
heat will be controlled by
the thermostat, not the
heat pump control when
wired as shown.
