Carrier 50FC 04 Series Service And Maintenance Instructions page 46

MENU PARAMETER
MECH COOL ON
or
HEAT STAGES ON
STATUS
(CONT) FAN SPEED
W (HEAT ON)
MAT SET
LOW T LOCK
DRYBLB SET
DRYBLB DIFF
ENTH CURVE
DCV SET
MIN POS
MIN POS L
SETPOINTS
MIN POS M
MIN POS H
VENTMAX L
VENTMAX M
VENTMAX H
VENTMIN L
VENTMIN M
VENTMIN H
Table 12 — W7220 Menu Structure
PARAMETER PARAMETER
DEFAULT RANGE AND
VALUE INCREMENT
0 0, 1, or 2
N/A LOW or HIGH
N/A ON/OFF
38 to 70°F; 
53°F
increment by 1
–45 to 80°F
32°F
increment by 1
48 to 80° F 
63°F
increment by 1
0 to 6°F
0°F
Increment by 2
ES1, ES2, ES3,
ES3
ES4, or ES5
500 to 2000 ppm;
1100ppm
increment by 100
4.4 V 2 to 10 Vdc
6.0 V 2 to 10 Vdc
5.4 V 2 to 10 Vdc
4.4 V 2 to 10 Vdc
6.0V 2 to 10 Vdc
5.4 V 2 to 10 Vdc
4.4 V 2 to 10 Vdc
3.7 V 2 to 10 Vdc
3.4 V 2 to 10 Vdc
2.8 V 2 to 10 Vdc
46
a,b,c,d,e (cont)
f
Displays stage of mechanical cooling that is active.
Displays the stage of heat pump heating that is active.
SUPPLY FAN SPEED
Displays speed setting of fan on a 2-speed fan unit.
HEAT DEMAND STATUS
Displays status of heat demand on a 2-speed fan unit.
MIXED AIR SETPOINT Setpoint determines where the economizer
will modulate the OA damper to maintain the mixed air temperature.
COMPRESSOR LOW TEMPERATURE LOCKOUT
Setpoint determines outdoor temperature when the mechanical
cooling cannot be turned on. Commonly referred to as the
Compressor lockout.
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 unit will
economize at 62°F and below and not economize at 64°F and
above. There is a 2°F deadband.
DRYBULB SET is only displayed if the economizer has a single dry
bulb sensor.
Drybulb Differential will only show if using dual drybulb — i.e. when
an outdoor air temperature sensor C7250 is attached to OAT
terminals and C7400S sensor is wired to S-Bus and configured for
RAT (return air). Free cooling will be assumed whenever OA temp
is at or below RAT minus this drybulb setting.
ENTHALPY CHANGEOVER CURVE
(Requires enthalpy sensor option)
Enthalpy boundary "curves" for economizing using single enthalpy.
DEMAND CONTROLLED VENTILATION SETPOINT
Displays only if CO sensor is connected. Setpoint for Demand
2
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.
VENTILATION MINIMUM POSITION. Only displayed if controller is
set for single speed unit under FAN TYPE, and if DCV is NOT used.
VENTILATION MINIMUM POSITION AT LOW SPEED. Only
displays if unit is set for 2 or 3 speed and CO
speed with 1 heat and 1 cool then set for HEATING ventilation. If
using 3 speed with 1 heat and 2 cool then set for LOW SPEED
COOLING ventilation.
VENTILATION MINIMUM POSITION AT MEDIUM SPEED. Only
displays if unit is set for 3 speed with 1 heat and 2 cool, and CO
not used. Set for HEATING ventilation.
VENTILATION MINIMUM POSITION AT HIGH SPEED. Only
displays if unit is set for 2 or 3 speed and CO
2 speed with 1 heat and 1 cool then set for COOLING ventilation. If
using 3 speed with 1 heat and 2 cool then set for HIGH SPEED
COOLING ventilation
DCV MAXIMUM DAMPER POSITION AT LOW SPEED. Only
displays if unit is set for 2 speed or 3 speed with 1 heat and 2 cool.
IF using 2 speed with 1 heat and 1 cool then set for HEATING
ventilation. If using 3 speed with 1 heat and 2 cool then set for LOW
SPEED COOLING
DCV MAXIMUM DAMPER POSITION AT MEDIUM SPEED. Only
displays if unit is set for 3 speed with 1 heat and 2 cool. Set for
HEATING ventilation.
DCV MAXIMUM DAMPER POSITION AT HIGH SPEED. Only
displays if unit is set for 2 speed or 3 speed with 1 heat and 2 cool.
IF using 2 speed with 1 heat and 1 cool then set for COOLING
ventilation. If using 3 speed with 1 heat and 2 cool then set for
HIGH SPEED COOLING ventilation
DCV MINIMUM DAMPER POSITION AT LOW SPEED. Only
displays if unit is set for 2 speed or 3 speed with 1 heat and 2 cool.
IF using 2 speed with 1 heat and 1 cool then set for HEATING
ventilation. If using 3 speed with 1 heat and 2 cool then set for LOW
SPEED COOLING
DCV MINIMUM DAMPER POSITION AT MEDIUM SPEED. Only
displays if unit is set for 3 speed with 1 heat and 2 cool. Set for
HEATING ventilation.
DCV MINIMUM DAMPER POSITION AT HIGH SPEED. Only
displays if unit is set for 2 speed or 3 speed with 1 heat and 2 cool.
IF using 2 speed with 1 heat and 1 cool then set for COOLING
ventilation. If using 3 speed with 1 heat and 2 cool then set for
HIGH SPEED COOLING ventilation
NOTES
is not used. If using 2
2
is not used. IF using
2
is
2