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Designator Description
O
Unused on NS23AM, for heat pump applications only
REV
Unused on NS23AM, for heat pump applications only
LPS
Low pressure switch (not used on NS23AM)
Low pressure switch sensing connection (not used on
LPS
NS23AM)
HPS
High pressure switch
HPS
High pressure switch sensing connection
TP
Top cap thermostat switch (in series with the HPS)
TP
Top cap thermostat switch sensing connection
Control (inverter power) contactor switched output (in
Cntctr
series with the HPS and TC)
Cntctr
Contactor common
FPWM
PWM fan output
C
PWM fan common connection
P10 (PSC
control
QC)
W
Unused; for heat pump applications only
L
24VAC input to initiate load shed
Y2 second stage cooling input when a conventional
Y2
24VAC thermostat is used. Must be jumpered to Y1 if a
single stage cooling thermostat is used
Y1
thermostat is used
O
Unused on NS23AM, for heat pump applications only
DS
C
24VAC nominal power return
I-
Unused
I+
Unused
R
24VAC nominal power input
DF
OEM test
TST
OEM test pin
Table 9. Outdoor Control Terminal Designations and Inputs / Outputs
31-5000746 Rev. 0
RAST Connector Terminal Designations
Page 29
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
10-97% duty cycle,
N/A
19-23 VDC peak
N/A
N/A
Switched 230VAC
N/A
Nominal
N/A
24VAC nominal
24VAC nominal
from load shed
N.O. contacts
N/A
(close to initiate
load shed)
24VAC nominal
N/A
from thermostat
24VAC nominal
N/A
from thermostat
24VAC nominal
N/A
from thermostat
N/A
N/A
N/A
N/A
Data
Data
Data
Data
24VAC nominal
board main
N/A
power input
N/A
N/A
24VAC nominal
N/A
Common
N/A
24VAC common
N/A
N/A
N/A
N/A
N/A
N/A
N/A
24VAC common
Fan PWM
common
N/A
N/A
N/A
N/A
N/A
N/A
N/A
24VAC common
N/A
N/A
N/A
N/A
N/A
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