Carrier WeatherExpert 50LC14, Installation Instructions Manual, Page: 65 / 84

65
Menu 3: Setpoints
PARAMETER
PROJECT
VALUE
PARAMETER
DEFAULT
VALUE
PARAMETER
RANGE AND
INCREMENT
NOTES
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 supply air temperature.
See Table 7 on page 48, Menu 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 temperature 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 Table 7 on page 48, Menu 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 2000 ppm;
increment by 100
DEMAND CONTROLLED VENTILATION SETPOINT
Displays only if CO
2
sensor is connected. Setpoint for Demand
Controlled 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)
VENTMAX 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)
VENTMIN H 2.8 V 2 to 10 Vdc DCV MINIMUM DAMPER POSITION AT HIGH SPEED
(Requires CO
2
sensor connected)
ERV OAT SP
32°F (0°C) 0 to 50°F
(-18 to 10°C);
increment by 1°
ENERGY RECOVERY VENTILATION UNIT OUTDOOR AIR
TEMPERATURE SETPOINT
Only when AUX1 O = ERV
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 fan1 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 fan1 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 2 is powered
by the economizer.
Only used when AUX1-O is set to EHX2.
EXH2H SET
75% 0 to 100%;
increment by 1
EXHAUST FAN STAGE 2 SETPOINT AT HIGH SPEED
Setpoint for OA damper position when exhaust fan 2 is powered
by the economizer.
Only used when AUX1-O is set to EHX2.