Carrier 50PG20-28 Controls, Start-Up, Operation, Service And Troubleshooting Instructions page 76

RED LED - STATUS
-\
GREEN LED -
LEN (LOCAL EQUIPMENT NETWORK)
Z
/
STATUS
YELLOW LED -
CCN (CARRIER COMFORT NETWORK)
INSTANCE JUMPER (SET TO 1)
DISPLAY NAME
INPUTS
HUM
FDWN
G
W2
Wl
Y2
Y1
SPT
SPTO or
RAT
OAT
SAT
SCT.A
SCT.B
SCTC
FANS
SSPA
SSPB
SSRC
FILS
CSA1
CSB1 or
CSA2
CS.CI or
CSB1
OUTPUTS
CRC
CMRC or
OFC2
CMRB
CMRA
CCH or
OFC.3 or
OFCl
OFC.2 or
RH2B
OFC.I or
RH2A
IDF
ALRM
HT1
HT2
COMMUNICATION
CCN
POINT DESCRIPTION
J8
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Fig. 22 -- Main Base Board (MBB)
Table 53 -- MBB Connections
SENSOR LOCATION
Input power from TRAN 1
Indoor fan output feedback (IGC), or
Space humidity switch
Fire shutdown svdtch
Thermostat G/Fan/
Thermostat W2 (2nd Stage Heat)
Thermostat W1 (1st Stage Heat)
Thermostat Y2 (2nd Stage Cool /
Thermostat Y1 (1 st Stage Cool)
Space temperature (T55/56)
Space temperature offset (T56), or
Return air temperature
Outdoor air temperature
Supply air temperature
Saturated condenser temperature, circuit A
Saturated condenser temperature, circuit B
Saturated condenser temperature, circuit C
Fan status switch
Suction pressure, circuit A
Suction pressure, circuit B
Suction pressure, ckcuit C
Filter status switch
Compressor A1 feedback
Compressor B1 feedback, or
Compressor A2 feedback
Compressor C1 feedback, or
Compressor B1 feedback
Output power to ECB
Output power to Marquee Display
Cool-Reheat1 control
Compressor CI relay, or
Outdoor fen 2 relax/
Compressor B1 relay
Compressor A1 relay
Crankcase heat relay, or
Outdoor fan 3 relay, or
Outdoor fan 1 relay
Outdoor fan 2 relay, or
Reheat2 valve, circuit B and C
Outdoor fan I relay, or
Reheat2 valve, circuit A
Indoor fen relay
Alarm re}ay
Heat sta_e 1 refa_/
Heat stage 2 re}ay
control box
gas section
space
supply/return/space
space
space
space
space
space
space
space
return
outdoor coil support
indoor fen housing, or supply duct
outdoor coil circuit A
outdoor coil circud S
outdoor coil circuit C
indoor fen section
compressor A suction
compressor E suction
compressor C suction
indoor fen section
control box
control box
controlbox
Local Equipment Network (LEN /
Carrier Comfort Network (CCN)
Network device power
TYPE OF IIO
24 VAC
switch input
svdtch input
svdtch input
switch input
switch input
switch input
switch input
1Ok thermistor
1Ok thermistor
1Ok thermistor
1Ok thermistor
5k thermistor
5k thermistor
5k thermistor
switch input
analog input
analog input
analog input
switch input
digital input
digital input
digital input
24 VAC
24 VAC
relay
relay
relay
relay
relay
relay
relay
relay
relay
relay
relay
communication
communication
24 VAC
CONNECTION
PIN NUMBER
J1, 1-3
J6.4
J6, 5-6
J7.2
J7, 4
J7, 6
J7.8
J7, 10
J8, 1-2
JS, 2-3
J8, 5-6
JS, 7-8
J8, 9-10
J8, 11-12
J8, 13-14
J8.15-16
J8 18-20
J8, 21-23
JS, 24-26
J9, 2-3
J9, 4-6
Jg, 7-9
JP, 10-12
J2,1-2
J4,5-6
J10,3
J10,6
J10,9
J10.11
J10.13
J10,16
J10.19
J10,21
J10.23
J10,25
J10.27
J5, 1-3
J5, 5-7
J5.9-10
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