Carrier 50PG20-28 Controls, Start-Up, Operation, Service And Troubleshooting Instructions page 79

17 I 14 I I I
J1O J11 RUN TEST J12
(_ SEPARATION OF CIRCUITS TO EACH 24V TRANSFORMER MUST BE MAINTAINED
I......... I T55IFANSTATOSl
1 2 3 4 5 6 7 8 9 10 R Y1 Y2 W1 W2 G C X 1 2 1 2 3 1 2
Fig. 25 -- Low-Voltage Terminal Strip
LEN CCN
Table 56 -- Field Connection Terminal Strip
CONNECTION
TERMINAL LABEL DISPLAY NAME POINT DESCRIPTION SENSOR LOCATION TYPE OF I/O PIN NUMBER
1 24 VAC power 24 VAC output J10, 17
2 IAQ Indoor air quality sensor return/space 4-20 mA input J10, 16
3 Indoor & outdoor air quality common 4-20 mA input J10, !5
4 OAQ or Outdoor air quality sensor, or economizer
SRRH Space humidity sensor space 4-20 mA input J10, 14
5 RMOC Remote occupancy switch field installed 24 VAC input J10, !3
6 Outdoor enthalpy switch power economizer 24 VAC input J10, 11-12
ENTH or Outdoor enthalpy switch, or economizer, or
7 IAQ.S Indoor air quality switch return/space 24 VAC input J1O, 9-10
8 EC.CP or EC.AP Economizer actuator (digital control) 2-10 VDC output J10, 6-8
EC.CP Economizer actuator (analog control) economizer 2-10 VDC output
9 Economizer signal common economizer VDC J10, 3-5
10 EC.CP Economizer actuator (digital control) communication
EC.AP Economizer actuator (analog control) economizer 2-10 VDC output J10, 1-2
R 24 VAC power 24 VAC output Jl!, 11-14
Y1 Y1 Thermostat Y1 (1st stage cool) space 24 VAC input J11 ,!0
Y2 Y2 Thermostat Y2 (2nd stage coo!) space 24 VAC input J11, 9
W! W1 Thermostat W1 (1st stage heat) space 24 VAC input J11,7-8
W2 W2 Thermostat W2 (2nd stage heat) space 24 VAC input J11,6
G G Thermostat G (Fan) space 24 VAC input J11,5
C 24 VAC common 24 VAC output J11,2-4
X ALRM Alarm output (normally open) 24 VAC output J11, 1
FIRE SHUTDOWN !-2, FDWN Fire shutdown switch supply/return/space switch input J12, 6-7
or HUM Space humidity switch space
HUMIDISTAT 1-2"
T55 1-2 SPT Space temperature (T55t56) space 10k thermistor J12, 4-5
Space temperature offset (T56) or space or return 10k thermistor J12, 3-4
T55 2-3 SPTO or RAT Return air temperature
LEN Local Equipment Network (LEN) communication J13, 1-3, 4-5
CCN Carrier Comfort Network (CCN) communication J13, 6-8, 4-5
TM
*Refer to Third Party Control section on page 38 for information on wiring fire shutdown with a Humidi-MiZer system.
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