5052617-UIM-E-1116
14
Johnson Controls Unitary Products
If using a single stage heat pump unit, connect the “Y” connection to Y/Y2 on furnace control board.
FIGURE 19:
Thermostat Chart - Two Stage HP with Two Stage Standard ECM Furnace
O
Reversing Valve
E
nergized in
C
ool
C
24 – Volt
C
ommon
R
24 – Volt
H
ot
W1 OU
T
F
irst
S
tage
H
eat
W2 OU
T
S
econd
S
tage
H
eat
Y2 OU
T
S
econd
S
tage
C
ompressor
Y1
S
ingle
S
tage
C
ompressor
X/L
M
alfunction Light
Y2
S
econd
S
tage
C
ompressor
W
A
uxiliary
H
eat
B
S
Bonnet
S
ensor
B
SG
Bonnet
S
ensor
YORK
G
U
A
RD VI
C
ON
T
ROL
C
hange
FF
uel jumper
on the heat pump control
to “ON”
C
hange
H
ot
H
eat Pump
jumper on the heat pump
control to “ON” if
H
ot
H
eat
Pump Operation is desired.
Bonnet
S
ensor
(Optional)
C
24 – Volt
C
ommon
R
24 – Volt
H
ot
Y1
F
irst
S
tage
C
ompressor
O
Reversing Valve
E
nergized in
C
ool
*L
M
alfunction Light
Y2
S
econd
S
tage
C
ompressor
G
F
an
THE
R
M
O
STAT
E
/W1
F
irst
S
tage
A
ux.
H
eat
W2
S
econd
S
tage
A
ux.
H
eat
* L
T
erminal not on all
T
hermostats
C
24 – Volt
C
ommon
R
24 – Volt
H
ot
W / W1
F
irst
S
tage
H
eat
W2
S
econd
S
tage
H
eat
Y / Y2
S
econd or
F
ull
S
tage
C
ompressor
T
WO
STAGE
P
SC
F
URN
ACE
G
F
an
Y1
S
ingle
S
tage
C
ompressor
E
xternal
H
umidistat
(Optional)
Open on
H
umidity Rise
24V
AC H
umidifier Relay
(Optional)
T
wo
S
tage
H
eat Pump -
T
wo
S
tage
F
urnace (
H
ot
H
eat Pump or
C
onventional)
A
0421-001
T
WO
STAGE
F
URN
ACE
(
ST
D
ECM
)
T
WO
STAGE
HEAT
PU
M
P
If using a heat pump an
external fossil fuel kit
must be used, If heat
pump doesn’t have
Yorkguard VI control.