Carrier WeatherExpert 50LC14, Руководство по установке, Страница: 49 / 84

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.