15
SETPOINTS
MAT SET
53°F (12°C)
38°F to 65°F
(3°C to 18°C);
increment by 1°
MIXED AIR SET POINT
Set point determines where the economizer will modulate the OA damper to maintain
the mixed air temperature.
LOW T LOCK
32°F (0°C)
–45°F to 80°F
(–43°C to 27°C);
increment by 1°
COMPRESSOR LOW TEMPERATURE LOCKOUT
Set point determines outdoor temperature when the mechanical cooling cannot be
turned on. Commonly referred to as the compressor lockout.
DRYBLB SET
63°F (17°C)
48°F to 80°F
(9°C to 27°C);
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 (17°C), unit will economize at 62°F (16.7°C) and
below and not economize at 64°F (17.8°C) and above. There is a 2°F (1.1°C)
deadband.
DRYBULB SET is only displayed if the economizer has a single dry bulb sensor.
DRYBLB DIFF
0°F
0°F to 6°F; increment
by 2°F
Dry bulb Differential will only show if using dual dry bulb - 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 dry
bulb 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
1100 ppm
500 to 2000 ppm;
increment by 100
DEMAND CONTROLLED VENTILATION SET POINT
Displays only if CO
2
sensor is connected. Set point for Demand Control 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
4.4V
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
6.0V
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
5.4V
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
4.4V
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
Displays only if a CO
2
sensor is connected. Used for Vbz (ventilation max cfm) set
point. Displays 2 to 10 V if <3 sensors (RA,OA, and MA). In AUTO mode dampers
controlled by cfm.
VENTMAX M
5.4V
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
4.4V
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
3.7V
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
3.4V
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
2.8V
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°C)
0°F to 50°F
(–18°C to 10°C);
increment by 1°
ENERGY RECOVERY VENTILATION UNIT OUTDOOR AIR TEMPERATURE
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.
EXH2 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 9 — Menu Structure
1
(cont)
MENU
PARAMETER
PARAMETER
DEFAULT
VALUE
PARAMETER
RANGE AND
INCREMENT
2
NOTES
