32
SETPOINTS
MAT SET 53°F 38 to 70°F;
increment by 1
MIXED AIR SETPOINT Setpoint determines where the economizer will mod-
ulate 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 tempera-
ture 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
ERV OAT SP
††
32°F 0 to 50°F
increment by 1
ENERGY RECOVERY VENTILATOR UNIT OUTDOOR AIR TEMPERA-
TURE SETPOINT
Only displayed when AUX1 O = ERV
EXH1 SET 50% 0 to 100% Exhaust fan set point for single speed units. Based on OA Damper position
to activate power exhaust.
EXH1 L SET 65% 0 to 100% EXHAUST FAN 1 SETPOINT AT LOW SPEED on 2 speed or 3 speed with 1
heat and 2 cool. Based on economizer OA damper position to activate power
exhaust.
EXH1 M SET 60% 0 to 100% EXHAUST POINT 1 SETPOINT AT MEDIUM SPEED. Only displays if unit is
set for 3 speed with 1 heat and 2 cool. Based on economizer OA damper
position to activate power exhaust.
EXH1 H SET 50% 0 to 100% EXHAUST FAN 1 SETPOINT AT HIGH SPEED on 2 speed or 3 speed with
1 heat and 2 cool. Based on economizer OA damper position to activate
power exhaust.
EXH2 L SET 80% 0 to 100% EXHAUST FAN 2 SETPOINT AT LOW SPEED on 2 speed or 3 speed with 1
heat and 2 cool. Based on economizer OA damper position to activate power
exhaust.
EXH2 M SET 77% 0 to 100% EXHAUST FAN 2 SETPOINT AT MEDIUM SPEED. Only displays if unit is
set for 3 speed with 1 heat and 2 cool. Based on economizer OA damper
position to activate power exhaust.
EXH2 H SET 75% 0 to 100% EXHAUST FAN 2 SETPOINT AT HIGH SPEED on 2 speed or 3 speed with
1 heat and 2 cool. Based on economizer OA damper position to activate
power exhaust.
Table 11 — W7220 Menu Structure*(cont)
MENU PARAMETER
PARAMETER
DEFAULT
VALUE
PARAMETER
RANGE AND
INCREMENT
†
NOTES
To Next Page
Loading...
