Page 27
XP25
TABLE 5
Outdoor Control Terminal Designations and Input /Outputs (see figure 16 for terminal locations)
Designator
Description
Input
Output
Common
O OUT
Reversing valve switched output
N/A
Switched 24VAC
nominal
N/A
O
Reversing valve return
N/A
N/A
24VAC common
LO PS
Low Pressure switch
N/A
5ma @18VAC
N/A
LO PS
Low Pressure switch sensing con
nection
5ma @18VAC
N/A
N/A
Hi PS
High Pressure switch
N/A
24VAC nominal
N/A
Hi PS
High pressure switch sensing con
nection
24VAC nominal
N/A
N/A
TP
Top cap thermostat switch (in series
with the HI PS)
N/A
24VAC nominal
N/A
TP
Top Cap thermostat switch sensing
connection
24VAC nominal
N/A
N/A
Cntctr
Control (Inverter power) contactor
switched output (in series with the HI
PS and TC)
N/A
Switched 24VAC
Nominal
N/A
Cntctr
Contactor common
N/A
24VAC common
Fan PWM
PWM fan output
N/A
1097% duty cycle,
1923 VDC peak
N/A
COM
PWM Fan common connection
N/A
N/A
Fan PWM common
Fan Park
PWM Fan Parking spot for unused
terminal, not connected.
N/A
N/A
N/A
P2 Terminals
O
O (reversing valve) emergency input
24VAC nominal from
thermostat and loaded to
draw 17ma at 30VAC
N/A
N/A
Y1
Y1 emergency input
24VAC nominal from
thermostat and loaded to
draw 17ma at 30VAC
N/A
N/A
C
24VAC nominal power return.
N/A
N/A
24VAC common
i
Low data line.
Data
Data
N/A
i+
High data line.
Data
Data
N/A
R
24VAC nominal power input.
24VAC nominal board
main power input.
N/A
N/A
DF
Factory test
N/A
N/A
N/A
TOUT
26Vdc transistor output to Lennox
factory OEM tester
N/A
N/A
N/A
TST
Factory test pin.
In each terminal box:
P2 Terminal 1 TEST
P2 Terminal 2 TOUT
P2 Terminal 3 DF
P2 Terminal 4 R
24VAC nominal 17ma @
30VAC
N/A
N/A
