Carrier WeatherExpert 50LC14 Installation Instructions Manual page 52

Table 8 — Economizer Module - Left Hand Terminal
LABEL TYPE
TOP LEFT TERMINAL BLOCK
MIXED AIR TEMPERATURE SENSOR
MAT 20K NTC
(POLARITY INSENSITIVE
MAT
AND COM
CONNECTION)
OUTDOOR AIR TEMPERATURE
OAT 20K NTC
SENSOR (POLARITY INSENSITIVE
OAT AND COM
CONNECTION)
S-BUS ENTHALPY CONTROL SENSOR
S-BUS
(SYLK* (POLARITY INSENSITIVE
S-BUS
BUS) CONNECTION)
BOTTOM LEFT TERMINAL BLOCK
AIR QUALITY SENSOR INPUT (E.G.
IAQ 2-10 2-10 VDC
CO
IAQ COM
COM AIR QUALITY SENSOR COMMON
AIR QUALITY SENSOR 24 VAC
IAQ 24V
24 VAC
SOURCE
DAMPER ACTUATOR OUTPUT (2-10
ACT 2-10 2-10 VDC
VDC)
DAMPER ACTUATOR OUTPUT
ACT COM COM
COMMON
DAMPER ACTUATOR 24 VAC
ACT 24V
24 VAC
SOURCE
* Sylk is a trademark of Honeywell International Inc.
NOTE: The bottom 4 Pin actuator header is not used
Left Terminal
Block Label
Fig. 69 — W7220 Wiring Terminals
Blocks
DESCRIPTION
SENSOR)
2
W7220 Controller
Right Terminal
Block Label
Table 9 — Economizer Module - Right Hand Terminal
LABEL
AUX2-I
24 VAC IN
OCC
24 VAC IN
E-GND
E-GND
24 VAC
EXH1
OUT
24 VAC
AUX1-O
OUT
BOTTOM RIGHT TERMINAL BLOCKS
Y2-I 24 VAC IN
24 VAC
Y2-O
OUT
Y1-I
24 VAC IN
24 VAC
Y1-O
OUT
C COM
R
24 VAC
52
Blocks
TYPE DESCRIPTION
TOP RIGHT TERMINAL BLOCKS
THE FIRST TERMINAL IS NOT USED.
SHUT DOWN (SD) OR HEAT (W)
CONVENTIONAL ONLY
AND
HEAT PUMP CHANGEOVER (O-B) IN
HEAT PUMP MODE.
OCCUPIED/UNOCCUPIED INPUT
EXHAUST FAN 1 OUTPUT
PROGRAMMABLE:
EXHAUST FAN 2 OUTPUT
OR
ERV
OR
SYSTEM ALARM OUTPUT
Y2 IN - COOLING STAGE 2 INPUT
FROM SPACE THERMOSTAT
Y2 OUT - COOLING STAGE 2 OUTPUT
TO STAGE 2 MECHANICAL COOLING
Y1 IN - COOLING STAGE 2 INPUT
FROM SPACE THERMOSTAT
Y1 OUT - COOLING STAGE 2 OUTPUT
TO STAGE 2 MECHANICAL COOLING
24 VAC COMMON
24 VAC POWER (HOT)