![background image](http://html1.mh-extra.com/html/carrier/weatherexpert-50lc14/weatherexpert-50lc14_installation-instructions-manual_2563585049.webp)
49
Table 7 —
W7220 Menu Structure* (cont)
MENU
PARAMETER
PARAMETER
DEFAULT
VALUE
PARAMETER
RANGE AND
INCREMENT
†
NOTES
STATUS (cont)
ACT COUNT
N/A
1 to 65535
Displays number of times actuator has cycled.
1 cycles equals accrued 180 deg. of actuator movement in any direction.
ACTUATOR
N/A
OK/Alarm (on Alarm
menu)
Displays ERROR if voltage or torque is below actuator range.
EXH1 OUT
OFF
ON/OFF
EXHAUST STAGE 1 RELAY OUTPUT
Output of EXH1 terminal:
ON = relay closed
OFF = relay open
EXH2 OUT
OFF
ON/OFF
EXHAUST STAGE 2 RELAY OUTPUT
Output of AUX terminal; displays only if AUX = EXH2
ON = relay closed
OFF = relay open
MECH COOL ON
0
0, 1, or 2
Displays stage of mechanical cooling that is active.
FAN SPEED
N/A
LOW or HIGH
SUPPLY FAN SPEED
Displays speed setting of fan on a 2-speed fan unit.
W (HEAT ON)
N/A
ON/OFF
HEAT DEMAND STATUS
Displays status of heat demand on a 2-speed fan unit.
SETPOINTS
MAT SET
53°F
(12
°C)
38 to 65°F
(3 to 18°C);
increment by 1
SUPPLY AIR SETPOINT
Setpoint determines where the economizer will modulate the OA damper
to maintain the mixed air temperature. See Note 2.
LOW T LOCK
32°F
(0°C)
-45 to 80°F
(-43 to 27°C);
increment by 1
COMPRESSOR LOW TEMPERATURE LOCKOUT
Setpoint determines outdoor temperature when the mechanical cooling
cannot be turned on.
DRYBLB SET
63°F
(17°C)
48 to 80°F
(9 to 27°C);
increment by 1
OA DRY BULB TEMPERATURE CHANGEOVER SETPOINT
Setpoint determines where the economizer will assume outdoor air tem-
perature is good for free cooling; e.g.; at 63°F (17°C) unit will economize
at 62°F (16.7°C) and below and not economize at 64°F (17.8°C) and
above. There is a 2°F (1.1°C) deadband. See Note 3.
ENTH CURVE
ES3
ES1,ES2,ES3,ES4,
or ES5
ENTHALPY CHANGEOVER CURVE
(Requires enthalpy sensor option)
Enthalpy boundary “curves” for economizing using single enthalpy.
DCV SET
1100ppm
500 to 2000ppm;
increment by 100
DEMAND CONTROLLED VENTILATION
Displays only if CO
2
sensor is connected. Setpoint for Demand Control
Ventilation of space. Above the setpoint, the OA dampers will modulate
open to bring in additional OA to maintain a space ppm level below the
setpoint.
MIN POS L
6.0 V
2 to 10 Vdc
VENTILATION MINIMUM POSITION AT LOW SPEED
Displays ONLY if a CO
2
sensor is NOT connected.
MIN POS H
4.4 V
2 to 10 Vdc
VENTILATION MINIMUM POSITION AT HIGH SPEED
Displays ONLY if a CO
2
sensor is NOT connected.
VENTMAX L
6.0 V
2 to 10 Vdc
DCV MAXIMUM DAMPER POSITION AT LOW SPEED
Requires CO
2
sensor connected.
VENT MAX H
4.4 V
2 to 10 Vdc
DCV MAXIMUM DAMPER POSITION AT HIGH SPEED
Requires CO
2
sensor connected.
VENTMIN L
3.7 V
2 to 10 Vdc
DCV MINIMUM DAMPER POSITION AT LOW SPEED
Requires CO
2
sensor connected.
VENTMINH
2.8 V
2 to 10 Vdc
DCV MINIMUM DAMPER POSITION AT HIGH SPEED
Requires CO
2
sensor connected.
EXH1 L SET
65%
0 to 100%;
increment by 1
EXHAUST FAN STAGE 1 SETPOINT AT LOW SPEED
Setpoint for OA damper position when exhaust fan 1 is powered by the
economizer.
EXH1 H SET
50%
0 to 100%;
increment by 1
EXHAUST FAN STAGE 1 SETPOINT AT HIGH SPEED
Setpoint for OA damper position when exhaust fan 1 is powered by the
economizer.
EXH2 L SET
80%
0 to 100%;
increment by 1
EXHAUST FAN STAGE 2 SETPOINT AT LOW SPEED
Setpoint for OA damper position when exhaust fan 1 is powered by the
economizer. Only used when AUX1-O is set to EHX2.
EXH2 H SET
75%
0 to 100%;
increment by 1
EXHAUST FAN STAGE 2 SETPOINT AT HIGH SPEED
Setpoint for OA damper position when exhaust fan 1 is powered by the
economizer. Only used when AUX1-O is set to EHX2.
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: ......