29
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°F to 70°F
(3°C to 21°C);
increment by 1°F
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°F to 80°F
(–43°C to 27°C);
increment by 1°F
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°F to 80°F
(9°C to 27°C);
increment by 1°F
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°F to 6°F
Increment by 2°F
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 7 — W7220 Menu Structure* (cont)
MENU
PARAMETER
PARAMETER
DEFAULT
VALUE
PARAMETER
RANGE AND
INCREMENT
†
NOTES
Summary of Contents for WeatherMaster 50GC 04-06 Series
Page 4: ...4 Fig 2 50GC 04 06 Unit Dimensional Drawing...
Page 5: ...5 Fig 2 50GC 04 06 Unit Dimensional Drawing cont...
Page 6: ...6 Fig 2 50GC 04 06 Unit Dimensional Drawing cont...
Page 22: ...22 Fig 42 Typical 50GC 04 06 Control Wiring Diagram 208 230V W7220 Control Unit Shown...
Page 23: ...23 Fig 43 Typical 50GC 04 06 Power Wiring Diagram 208 230V Unit Shown...
Page 41: ......
