44
STATUS
(CONT)
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 ON) N/A ON/OFF HEAT DEMAND STATUS
Displays status of heat demand on a 2-speed fan unit.
SETPOINTS
MAT SET 53°F 38 to 70°F;
increment by 1
MIXED AIR SETPOINT Setpoint determines where the economizer
will modulate the OA damper to maintain the mixed air temperature.
LOW T LOCK 32°F -45 to 80°F
increment by 1
COMPRESSOR LOW TEMPERATURE LOCKOUT
Setpoint determines outdoor temperature when the mechanical
cooling cannot be turned on. Commonly referred to as the
Compressor lockout.
DRYBLB SET 63°F 48 to 80° F
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 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.
DRYBLB DIFF 0°F 0 to 6°F
Increment by 2
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.
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 4.4 V 2 to 10 Vdc VENTILATION MINIMUM POSITION. Only displayed if controller is
set for single speed unit under FAN TYPE, and if DCV is NOT used.
MIN POS L 6.0 V 2 to 10 Vdc VENTILATION MINIMUM POSITION AT LOW SPEED. Only displays
if unit is set for 2 or 3 speed and CO
2
is not used. 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
ventilation.
MIN POS M 5.4 V 2 to 10 Vdc VENTILATION MINIMUM POSITION AT MEDIUM SPEED. Only
displays if unit is set for 3 speed with 1 heat and 2 cool, and CO
2
is not
used. Set for HEATING ventilation.
MIN POS H 4.4 V 2 to 10 Vdc VENTILATION MINIMUM POSITION AT HIGH SPEED. Only
displays if unit is set for 2 or 3 speed and CO
2
is not used. 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
VENTMAX L 6.0V 2 to 10 Vdc 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
VENTMAX M 5.4 V 2 to 10 Vdc 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.
VENTMAX H 4.4 V 2 to 10 Vdc 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
VENTMIN L 3.7 V 2 to 10 Vdc 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
VENTMIN M 3.4 V 2 to 10 Vdc 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.
VENTMIN H 2.8 V 2 to 10 Vdc 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
Table 12 — W7220 Menu Structure* (cont)
MENU PARAMETER
PARAMETER
DEFAULT
VALUE
PARAMETER
RANGE AND
INCREMENT
†
NOTES
To Next Page
Loading...
Need help?
General
