HP 28A Two Stage Heat Pump – Variable Speed Modulating Furnace (With Hot Heat Pump Operation)
THERMOSTAT
*PP32U71124
*PP32U72124
C
24 – Volt Common
Y1
First Stage Compressor
R
24 – Volt Hot
G
Fan
W2
Second Stage Aux. Heat
O
Reversing Valve
Energized in Cool
L
Malfunction Light
Y2
Second Stage Compressor
E/W1
First Stage Aux. Heat
DHM
Dehumidistat
HM
Humidistat
Step 1 of the Thermostat Installer Table must be set to Heat Pump
Step 2 of the Thermostat Installer Table must be set to 2
Step 5 of Thermostat User
Configuration Menu must
be set to “ON” for
Dehumidification
E2/P Switch must be in the
E2 position
24VAC Humidifier
(Optional)
ID MODELS
PC9
FC9C
FL9C
VARIABLE SPEED
MODULATING
FURNACE
VARIABLE SPEED | 2 | ||
MODULATING | |||
|
| ||
FURNACE CONTROL |
|
| |
C |
|
| |
24 – Volt Common |
|
| |
|
|
| |
Y1
Single Stage Compressor
R
24 – Volt Hot
G
Fan
W
Modulating Heat
Y/Y2
Second or Full
Stage Compressor
HUM
Dehumidification-
Open on Humidity Rise
Move HUMIDISTAT
jumper to “YES”
if humidistat is to be used.
Bonnet Sensor
(Optional)
OD MODELS
YZE
YZH
H*5
H*8
TWO STAGE
HEAT PUMP
YORKGUARD VI | 1 |
CONTROL |
|
|
|
C
24 – Volt Common
Y1
Single Stage Compressor
R
24 – Volt Hot
W1 OUT
First Stage Heat
W2 OUT
Second Stage Heat
Y2 OUT
Second Stage Compressor
O
Reversing Valve
Energized in Cool
X/L
Malfunction Light
Y2
Second Stage Compressor
W
Auxiliary Heat
BSG
Bonnet Sensor
BS
Bonnet Sensor
Change FFuel jumper
on the heat pump control
to “ON”
Change Hot Heat Pump jumper on the heat pump control to “ON”
Part Numbers:
SAP = Legacy
171334 =
2
Part Numbers:
SAP = Legacy
126768 =
18395 =
340512 =
1
Thermostat Chart -
8 | Unitary Products Group |