Carrier 48FC 04, Руководство по установке, Страница: 31 / 48

31
STATUS
(cont)
EXH2 OUT OFF ON/OFF
EXHAUST STAGE 2 RELAY OUTPUT
Output of AUX1 O terminal
Displays ON when damper position reaches programmed
percentage set point.
ON = 24 vac output
OFF = No output
Displays only if AUX1 O = EXH2
ERV OFF ON/OFF
ENERGY RECOVERY VENTILATOR
Output of AUX1 O terminal; displays only if AUX1 O = ERV
ON = 24 vac output
OFF = No Output
MECH COOL ON
or
HEAT STAGES ON
0 0, 1, or 2
Displays stage of mechanical cooling that is active.
Displays the stage of heat pump heating 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 IN) 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°F to 70°F
(3°C to 21°C);
increment by 1
degree
SUPPLY AIR SETPOINT
The economizer will modulate the OA damper to maintain the
mixed air temperature at the set point
LOW T LOCK 32°F (0°C)
–45°F to 80°F
(–43°C to 27°C);
increment by 1
degree
COMPRESSOR LOW TEMPERATURE LOCKOUT
Set point determines outdoor temperature when the mechanical
cooling cannot be turned on. Commonly referred to as the
Compressor lockout. At or below the set point, the Y1-O and Y2-
O will not be energized on the controller.
DRYBLB SET 63°F (17°C)
48°F to 80°F
(9°C to 27°C);
increment by
1 degree
OA DRY BULB TEMPERATURE CHANGEOVER SETPOINT
Dry bulb set point will only appear if using dry bulb changeover.
Set point 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.
ENTH CURVE ES3
ES1,ES2,ES3,ES4,
or ES5
ENTHALPY CHANGEOVER CURVE
ES curve will only appear if using enthalpy changeover.
Enthalpy boundary “curves” for economizing using single
enthalpy. See page 38 for description of enthalpy curves.
DCV SET 1100ppm
500 to 2000 ppm;
increment by 100
DEMAND CONTROLLED VENTILATION
Displays only if CO
2
sensor is connected. Set point for Demand
Controlled Ventilation of space. Above the set point, the OA
dampers will modulate open to bring in additional OA to maintain
a space ppm level below the set point.
MIN POS 2.8 V 2 to 10 vdc
VENTILATION MINIMUM POSITION
Displays ONLY if a CO
2
sensor is NOT connected.
With 2-speed fan units, MIN POS L (low speed fan) and MIN
POS H (high speed fan) settings are required. Default for MIN
POS L is 3.2V and MIN POS H is 2.8V.
VENTMAX 2.8 V
2 to 10 vdc
DCV MAXIMUM DAMPER POSITION
Displays only if a CO
2
sensor is connected.
Used for Vbz (ventilation max cfm) set point. VENTMAX is the
same setting as MIN POS would be if unit did not have CO
2
sensor.
100 to 9990 cfm;
increment by 10
If OA, MA, RA, and CO
2
sensors are connected and DCV CAL
ENABLE is set to AUTO mode, the OA dampers are controlled
by CFM and displays from 100 to 9990 CFM.
2 to 10 vdc
With 2-speed fan units, VENTMAX L (low speed fan) and
VENTMAX H (high speed fan) settings are required. Default for
VENTMAX L is 3.2V and VENTMAX H is 2.8V
VENTMIN 2.25 V
2 to 10 vdc or 100
to 9990 cfm
increment by 10
DCV MINIMUM DAMPER POSITION
Displays only if a CO
2
sensor is connected. Used for Va
(ventilation min cfm) set point. This is the ventilation for less than
maximum occupancy of the space.
100 to 9990 cfm;
increment by 10
If OA, MA, RA, and CO
2
sensors are connected and DCV CAL
ENABLE is set to AUTO mode, the OA dampers are controlled
by CFM and displays from 100 to 9990 CFM.
2 to 10 vdc
With 2-speed fan units VENTMIN L (low speed fan) and
VENTMIN H (high speed fan) settings are required. Default for
VENTMIN L is 2.5V and VENTMIN H is 2.25V
ERV OAT SP †† 32°F (0°C)
0°F to 50°F
(–18°C to 10°C);
increment by
1 degree
ENERGY RECOVERY VENTILATOR UNIT OUTDOOR AIR
TEMPERATURE SETPOINT
Only when AUX1 O = ERV
Table 11 — W7220 Menu Structure* (cont)
MENU PARAMETER
PARAMETER
DEFAULT
VALUE
PARAMETER
RANGE AND
INCREMENT †
EXPANDED PARAMETER NAME
Notes