835966-UIM-E-0814
Johnson Controls Unitary Products
13
FIGURE 13:
Thermostat Wiring –
Single Stage Heat Pump (with YGVI control)
– PSC Air Handler
Single Stage Heat Pump (with YGVI control) - PSC Air Handler
ID MODELS
A009-001
AHR
MA
Change FFuel” jumper
on the heat pump control
to “OFF”
“
Move the HUM STAT
jumper to “YES”
if humidistat is to be
used.
Refer to AH
documentation
for W1 and W2 electric
heat staging options
Jumper 3 must be
set to “ELEC”
Jumper 2 must be
set to “O”
Jumper 1 must be
set to “HEAT PUMP”
BS
Bonnet Sensor
BSG
Bonnet Sensor
W
Auxiliary Heat
Y2
Second Stage
Compressor
X/L
Malfunction Light
O
Reversing Valve
Energized In Cool
Y2 OUT
Second Stage
Compressor
W2 OUT
Second Stage Heat
W1 OUT
First Stage Heat
R
24 - Volt Hot
Y1
Single Stage
Compressor
C
24 - Volt Common
HUM OUT
(24 VAC out)
Humidifier
EAC
(24 VAC out)
Electronic Air Cleaner
HUM
Humidity Switch
Open on Humidity Rise
X/L
Malfunction Light
O
Reversing Valve
Energized In Cool
Y1
First Stage Compressor
W2
Second Stage Heat
W1
First Stage Heat
G
FAN
R
24 - Volt Hot
Y/Y2
Second or Full
Stage Compressor
COM
24 - Volt Common
C
24 - Volt Common
Y1
First Stage Compressor
R
24 - Volt Hot
G
FAN
W2
Second Stage Heat
W1/O/B
First Stage Heat
External Humidistat
(Optional)
Open on Humidity Rise
THERMOSTAT
S1-THSU21P1b
PSC
AIR HANDLER
SINGLE STAGE
HEAT PUMP
PSC
AIR HANDLER
CONTROL
YORKGUARD VI
CONTROL
24VAC Humidifier Relay
(Optional)
24VAC Electronic
Air Cleaner Relay
(Optional)