Lennox XC25-024-230-01 Installation And Service Procedure page 27

Outdoor Control Terminal Designations and Input /Outputs (see figure 15 for terminal locations)
Designator Description
Unused on XC25, for heat pump applications
O
only.
Unused on XC25, for heat pump applications
O OUT
only.
LO PS Low pressure switch
LO PS Low pressure switch sensing connection
Hi PS High pressure switch
Hi PS High pressure switch sensing connection
Top cap thermostat switch (in series with the HI
TP
PS)
TP Top cap thermostat switch sensing connection
Control (inverter power) contactor switched out­
Cntctr
put (in series with the HI PS and TC)
Cntctr Contactor common
Fan PWM PWM fan output
COM PWM fan common connection
PWM fan parking spot for unused terminal, not
Fan Park
connected.
Unused on XC25, for heat pump applications
O
only.
Y1 Y1 emergency input
C 24VAC nominal power return.
i­ Low data line.
i+ High data line.
R 24VAC nominal power input.
DF OEM test
26Vdc transistor output to Lennox factory OEM
TOUT
tester
OEM test pin.
In each terminal box:
P2 ­ Terminal 1 ­ TEST
TST
P2 ­ Terminal 2 ­ TOUT
P2 ­ Terminal 3 ­ DF
P2 ­ Terminal 4 ­ R
TABLE 5
Input
N/A
N/A
N/A
5ma @18VAC
N/A
24VAC nominal
N/A
24VAC nominal
N/A
N/A
N/A
N/A
N/A
P2 Terminal Designations
24VAC nominal from ther­
mostat and loaded to draw
17ma at 30VAC
24VAC nominal from ther­
mostat and loaded to draw
17ma at 30VAC
N/A
Data
Data
24VAC nominal board main
power input.
N/A
N/A
24VAC nominal 17ma @
30VAC
27
Output Common
Switched 24VAC
N/A
nominal
N/A 24VAC common
5ma @18VAC N/A
N/A N/A
24VAC nominal N/A
N/A N/A
24VAC nominal N/A
N/A N/A
Switched 24VAC
N/A
Nominal
24VAC common
10­97% duty cycle,
N/A
19­23 VDC peak
Fan PWM com­
N/A
mon
N/A N/A
N/A N/A
N/A N/A
N/A 24VAC common
Data N/A
Data N/A
N/A N/A
N/A N/A
N/A N/A
N/A N/A
XC25