Carrier 48PG20 - Page 79

79
Table 56 — Field Connection Terminal Strip
*Refer to Third Party Control section on page 38 for information on wiring fire shutdown with a Humidi-MiZer™ system.
TERMINAL LABEL DISPLAY NAME POINT DESCRIPTION SENSOR LOCATION TYPE OF I/O
CONNECTION
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, 15
4
OAQ or
SP.RH
Outdoor air quality sensor, or
Space humidity sensor
economizer
space
4-20 mA input J10, 14
5 RM.OC Remote occupancy switch field installed 24 VAC input J10, 13
6 Outdoor enthalpy switch power economizer 24 VAC input J10, 11-12
7
ENTH or
IAQ.S
Outdoor enthalpy switch, or
Indoor air quality switch
economizer, or
return/space
24 VAC input J10, 9-10
8
EC.CP or EC.AP
EC.CP
Economizer actuator (digital control)
Economizer actuator (analog control)
economizer
2-10 VDC output
2-10 VDC output
J10, 6-8
9 Economizer signal common economizer VDC J10, 3-5
10
EC.CP
EC.AP
Economizer actuator (digital control)
Economizer actuator (analog control)
economizer
communication
2-10 VDC output
J10, 1-2
R 24 VAC power 24 VAC output J11, 11-14
Y1 Y1 Thermostat Y1 (1st stage cool) space 24 VAC input J11,10
Y2 Y2 Thermostat Y2 (2nd stage cool) space 24 VAC input J11, 9
W1 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 1-2,
or
HUMIDISTAT 1-2*
FDWN
HUM
Fire shutdown switch
Space humidity switch
supply/return/space
space
switch input J12, 6-7
T55 1-2 SPT Space temperature (T55/56) space 10k thermistor J12, 4-5
T55 2-3 SPTO or RAT
Space temperature offset (T56) or
Return air temperature
space or return 10k thermistor J12, 3-4
LEN Local Equipment Network (LEN) communication J13, 1-3, 4-5
CCN Carrier Comfort Network (CCN) communication J13, 6-8, 4-5
SEPARATION OF CIRCUITS TO EACH 24V TRANSFORMER MUST BE MAINTAINED
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
FAN STATUS
T55
J12
FIRE SHUTDOWN
RUN TEST
J13
7
8
J11
7
14
17
J10
LEN
CCN
CCN
(COM)
SHIELD
(-)
(+)
48HG500382
Fig. 25 — Low-Voltage Terminal Strip
a48-7568