19
STATUS
(cont)
ERV
OFF
ON/OFF
ENERGY RECOVERY UNIT RELAY OUTPUT
Output of AUX terminal; displays only if AUX = ERV
ON = relay closed
OFF = relay open
MECH COOL ON
0
0, 1, or 2
Displays stage of mechanical cooling 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
(12°C)
38 to 70°F;
(3 to 18°C)
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
(0°C)
–45 to 80°F;
(–43 to 27°C)
increment by 1
COMPRESSOR LOW TEMPERATURE LOCKOUT
Setpoint determines outdoor temperature when the mechanical cooling
cannot be turned on.
DRYBLB SET
63°F
(17°C)
48 to 80°F
(9 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 DIF
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 a
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
1100 ppm
500 to 2000 ppm;
increment by 100
DEMAND CONTROLLED VENTILATION SETPOINT
Displays only if CO
2
sensor is connected. Setpoint for Demand Control
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 displays 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 CO2 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 CO2 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 CO2 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
6.0 V
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
5.4V
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
4.4 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
3.4V
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
2.8 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°C)
0 to 50°F;
(–18 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%;
Increment by 1
EXHAUST FAN SETPOINT AT LOW SPEED (on 2 speed unit)
Setpoint for OA damper position when exhaust fan is powered by the
economizer
Table 11 — Menu Structure*(cont)
MENU
PARAMETER
PARAMETER
DEFAULT
VALUE
PARAMETER
RANGE AND
INCREMENT†
NOTES
