Outdoor Control Terminal Designations And Input/Outputs - Lennox XP25-024-230-01 Installation And Service Procedure

Outdoor Control Terminal Designations and Input /Outputs (see figure 16 for terminal locations)
Designator Description
O OUT Reversing valve switched output
O Reversing valve return
LO PS Low Pressure switch
Low Pressure switch sensing con­
LO PS
nection
Hi PS High Pressure switch
High pressure switch sensing con­
Hi PS
nection
Top cap thermostat switch (in series
TP
with the HI PS)
Top Cap thermostat switch sensing
TP
connection
Control (Inverter power) contactor
Cntctr switched output (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
Fan Park
terminal, not connected.
P2 Terminals
O O (reversing valve) emergency input
Y1 Y1 emergency input
C 24VAC nominal power return.
i­ Low data line.
i+ High data line.
R 24VAC nominal power input.
DF Factory test
26Vdc transistor output to Lennox
TOUT
factory OEM tester
Factory 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 Output
Switched 24VAC
N/A
nominal
N/A N/A
N/A 5ma @18VAC
5ma @18VAC N/A
N/A 24VAC nominal
24VAC nominal N/A
N/A 24VAC nominal
24VAC nominal N/A
Switched 24VAC
N/A
Nominal
N/A
10­97% duty cycle,
N/A
19­23 VDC peak
N/A N/A
N/A N/A
24VAC nominal from
thermostat and loaded to N/A
draw 17ma at 30VAC
24VAC nominal from
thermostat and loaded to N/A
draw 17ma at 30VAC
N/A N/A
Data Data
Data Data
24VAC nominal board
N/A
main power input.
N/A N/A
N/A N/A
24VAC nominal 17ma @
N/A
30VAC
Page 27
Common
N/A
24VAC common
N/A
N/A
N/A
N/A
N/A
N/A
N/A
24VAC common
N/A
Fan PWM common
N/A
N/A
N/A
24VAC common
N/A
N/A
N/A
N/A
N/A
N/A
XP25