Carrier 50FCQ 04-07 Series Service And Maintenance Instructions page 49

MENU PARAMETER
EXH2 OUT
STATUS
ERV
(cont)
MECH COOL ON
or
HEAT STAGES ON
FAN SPEED
W (HEAT IN)
MAT SET
LOW T LOCK
DRYBLB SET
ENTH CURVE
DCV SET
MIN POS
SETPOINTS
VENTMAX
VENTMIN
ERV OAT SP
Table 17 — W7220 Menu Structure
PARAMETER PARAMETER
DEFAULT RANGE AND
VALUE INCREMENT
OFF
OFF
0
N/A LOW or HIGH
N/A
53°F (12°C) (3°C to 21°C);
e
increment by 1°F
–45°F to 80°F
32°F (0°C) (–43°C to 27°C);
increment by 1°F
g 63°F (17°C) (9°C to 27°C);
increment by 1°F
ES1,ES2,ES3,ES4,
ES3
500 to 2000 ppm;
1100 ppm
increment by 100
2.8-v
2.8-v
100 to 9990 cfm;
increment by 10
2 to 10 vdc or 100
increment by 10
2.25-v 100 to 9990 cfm;
increment by 10
h 32°F (0°C) (–18°C to 10°C);
increment by 1°F
a (cont)
b
EXHAUST STAGE 2 RELAY OUTPUT
Output of AUX1 O terminal
Displays ON when damper position reaches programmed
ON/OFF percentage set point.
ON = 24 vac output
OFF = No output
Displays only if AUX1 O = EXH2
ENERGY RECOVERY VENTILATOR
Output of AUX1 O terminal; displays only if AUX1 O = ERV
ON/OFF
ON = 24 vac output
OFF = No Output
Displays stage of mechanical cooling that is active.
0, 1, or 2
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
ON/OFF
Displays status of heat demand on a 2-speed fan unit.
38°F to 70°F SUPPLY AIR SETPOINT
The economizer will modulate the OA damper to maintain the
mixed air temperature at the set point.
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.
OA DRY BULB TEMPERATURE CHANGEOVER SETPOINT
Dry bulb set point will only appear if using dry bulb changeover.
48°F to 80°F
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.
ENTHALPY CHANGEOVER CURVE
ES curve will only appear if using enthalpy changeover.
or ES5 Enthalpy boundary "curves" for economizing using single
enthalpy. See page 57 for description of enthalpy curves.
DEMAND CONTROLLED VENTILATION
Displays only if CO
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.
VENTILATION MINIMUM POSITION
Displays ONLY if a CO
2 to 10 vdc
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 3.2-v and MIN POS H is 2.8-v.
DCV MAXIMUM DAMPER POSITION
Displays only if a CO
2 to 10 vdc Used for Vbz (ventilation maximum cfm) set point. VENTMAX is
the same setting as MIN POS would be if unit did not have CO
sensor.
If OA, MA, RA, and CO
ENABLE is set to AUTO mode, the OA dampers are controlled
by cfm and displays from 100 to 9990 cfm.
With 2-speed fan units, VENTMAX L (low speed fan) and
2 to 10 vdc VENTMAX H (high speed fan) settings are required. Default for
VENTMAX L is 3.2-v and VENTMAX H is 2.8-v.
DCV MINIMUM DAMPER POSITION
Displays only if a CO
to 9990 cfm
(ventilation min cfm) set point. This is the ventilation for less than
maximum occupancy of the space.
If OA, MA, RA, and CO
ENABLE is set to AUTO mode, the OA dampers are controlled
by cfm and displays from 100 to 9990 cfm.
With 2-speed fan units VENTMIN L (low speed fan) and
2 to 10 vdc VENTMIN H (high speed fan) settings are required. Default for
VENTMIN L is 2.5-v and VENTMIN H is 2.25-v.
0°F to 50°F ENERGY RECOVERY VENTILATOR UNIT OUTDOOR AIR
TEMPERATURE SETPOINT
Only when AUX1 O = ERV
49
EXPANDED PARAMETER NAME
NOTES
sensor is connected. Set point for Demand
2
sensor is NOT connected.
2
sensor is connected.
2
sensors are connected and DCV CAL
2
sensor is connected. Used for Va
2
sensors are connected and DCV CAL
2
2