![background image](http://html1.mh-extra.com/html/carrier/weatherexpert-50lc14/weatherexpert-50lc14_installation-instructions-manual_2563585052.webp)
52
Fig. 69 —
W7220 Wiring Terminals
Table 8 —
Economizer Module - Left Hand Terminal
Blocks
* Sylk is a trademark of Honeywell International Inc.
Table 9 —
Economizer Module - Right Hand Terminal
Blocks
W7220 Controller
Left Terminal
Block Label
Right Terminal
Block Label
NOTE: The bottom 4 Pin actuator header is not used
LABEL
TYPE
DESCRIPTION
TOP LEFT TERMINAL BLOCK
MAT
MAT
20K NTC
AND COM
MIXED AIR TEMPERATURE SENSOR
(POLARITY INSENSITIVE
CONNECTION)
OAT
OAT
20K NTC
AND COM
OUTDOOR AIR TEMPERATURE
SENSOR (POLARITY INSENSITIVE
CONNECTION)
S-BUS
S-BUS
S-BUS
(SYLK*
BUS)
ENTHALPY CONTROL SENSOR
(POLARITY INSENSITIVE
CONNECTION)
BOTTOM LEFT TERMINAL BLOCK
IAQ 2-10
2-10 VDC
AIR QUALITY SENSOR INPUT (E.G.
CO
2
SENSOR)
IAQ COM
COM
AIR QUALITY SENSOR COMMON
IAQ 24V
24 VAC
AIR QUALITY SENSOR 24 VAC
SOURCE
ACT 2-10
2-10 VDC
DAMPER ACTUATOR OUTPUT (2-10
VDC)
ACT COM
COM
DAMPER ACTUATOR OUTPUT
COMMON
ACT 24V
24 VAC
DAMPER ACTUATOR 24 VAC
SOURCE
LABEL
TYPE
DESCRIPTION
TOP RIGHT TERMINAL BLOCKS
AUX2-I
24 VAC IN
THE FIRST TERMINAL IS NOT USED.
OCC
24 VAC IN
SHUT DOWN (SD) OR HEAT (W)
CONVENTIONAL ONLY
AND
HEAT PUMP CHANGEOVER (O-B) IN
HEAT PUMP MODE.
E-GND
E-GND
OCCUPIED/UNOCCUPIED INPUT
EXH1
24 VAC
OUT
EXHAUST FAN 1 OUTPUT
AUX1-O
24 VAC
OUT
PROGRAMMABLE:
EXHAUST FAN 2 OUTPUT
OR
ERV
OR
SYSTEM ALARM OUTPUT
BOTTOM RIGHT TERMINAL BLOCKS
Y2-I
24 VAC IN
Y2 IN - COOLING STAGE 2 INPUT
FROM SPACE THERMOSTAT
Y2-O
24 VAC
OUT
Y2 OUT - COOLING STAGE 2 OUTPUT
TO STAGE 2 MECHANICAL COOLING
Y1-I
24 VAC IN
Y1 IN - COOLING STAGE 2 INPUT
FROM SPACE THERMOSTAT
Y1-O
24 VAC
OUT
Y1 OUT - COOLING STAGE 2 OUTPUT
TO STAGE 2 MECHANICAL COOLING
C
COM
24 VAC COMMON
R
24 VAC
24 VAC POWER (HOT)
Summary of Contents for WeatherExpert 50LC14
Page 4: ...4 Fig 2 50LC Vertical Airflow Size 14...
Page 5: ...5 Fig 3 50LC Horizontal Airflow Size 14...
Page 6: ...6 Fig 4 50LC Back View and Condensate Drain Location Size 14...
Page 7: ...7 Fig 5 50LC Corner Weights and Clearances Size 14...
Page 8: ...8 Fig 6 50LC Bottom View Size 14...
Page 9: ...9 Fig 7 50LC Vertical Airflow Sizes 17 20...
Page 10: ...10 Fig 8 50LC Horizontal Airflow Sizes 17 20...
Page 11: ...11 Fig 9 50LC Back View and Condensate Drain Location Sizes 17 20...
Page 12: ...12 Fig 10 50LC Corner Weights and Clearances Sizes 17 20...
Page 13: ...13 Fig 11 50LC Bottom View Sizes 17 20...
Page 14: ...14 Fig 12 50LC Vertical Airflow Sizes 24 26...
Page 15: ...15 Fig 13 50LC Horizontal Airflow Sizes 24 26...
Page 16: ...16 Fig 14 50LC Back View and Condensate Drain Location Sizes 24 26...
Page 17: ...17 Fig 15 50LC Corner Weights and Clearances Sizes 24 26...
Page 18: ...18 Fig 16 50LC Bottom View Sizes 24 26...
Page 21: ...21 Fig 19 Roof Curb Details 14 Size Unit...
Page 22: ...22 Fig 20 Roof Curb Details 17 and 20 Size Units...
Page 23: ...23 Fig 21 Roof Curb Details 24 and 26 Size Units...
Page 30: ...30 Fig 42 50LC 14 26 Electro Mechanical Control Wiring Diagram...
Page 31: ...31 Fig 43 50LC 14 26 RTU Open Control Wiring Diagram...
Page 32: ...32 Fig 44 50LC 14 26 SystemVu Control Wiring Diagram...
Page 35: ...35 Fig 47 Typical Power Wiring Diagram SystemVu Controls 50LC Unit 208 230V Shown...
Page 36: ...36 Fig 48 Typical Power Wiring Diagram SystemVu Controls 50LC Unit 460V 575V Shown...
Page 80: ......
Page 81: ......