Carrier 50LC 07, Инструкции по обслуживанию и техническому обслуживанию, Страница: 42 / 100

42
Table 9 -- Menu Structure
a
(cont)
Menu Parameter
Parameter
Default
Value
Parameter
Range and Increment
b
EXPANDED PARAMETER NAME
Notes
STATUS EXH2 OUT OFF ON/OFF EXHAUST STAGE 2 RELAY OUTPUT
Output of AUX terminal; displays only if AUX = EXH2
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 65
_
F;
(3 to 18
_
C)
increment by 1
SUPPLY AIR SETPOINT
Setpoint determines where the economizer will modulate the OA damper to
maintain the mixed air temperature.
See Menu Note 2.
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.
See Menu Note 3
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 CONTROL 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 L 6.0 V 2 to 10 Vdc VENTILATION MINIMUM POSITION AT LOW SPEED
Displays ONLY if a CO
2
sensor is NOT connected.
MIN POS H 4.4 V 2 to 10 Vdc VENTILATION MINIMUM POSITION AT HIGH SPEED
Displays ONLY if a CO
2
sensor is NOT connected.
VENTMAX L 6.0 V 2 to 10 Vdc DCV MAXIMUM DAMPER POSITION AT LOW SPEED
(Requires CO
2
sensor connected)
VENTMAX H 4.4 V 2 to 10 Vdc DCV MAXIMUM DAMPER POSITION AT HIGH SPEED
(Requires CO
2
sensor connected)
VENTMIN L 3.7 V 2 to 10 Vdc DCV MINIMUM DAMPER POSITION AT LOW SPEED
(Requires CO
2
sensor connected)
VENTMIN H 2.8 V 2 to 10 Vdc DCV MINIMUM DAMPER POSITION AT HIGH SPEED
(Requires CO
2
sensor connected)
EXH1 L SET 65% 0 to 100%;
Increment by 1
EXHAUST FAN STAGE 1 SETPOINT AT LOW SPEED
Setpoint for OA damper position when exhaust fan1 is powered by the
economizer
EXH1 H SET 50% 0 to 100%;
Increment by 1
EXHAUST FAN STAGE 1 SETPOINT AT HIGH SPEED
Setpoint for OA damper position when exhaust fan1 is powered by the
economizer
EXH2 L SET 80% 0 to 100%;
Increment by 1
EXHAUST FAN STAGE 2 SETPOINT AT LOW SPEED
Setpoint for OA damper position when exhaust fan1 is powered by the
economizer. Only used when AUX1---O is set to EHX2.
EXH2 H SET 75% 0 to 100%;
Increment by 1
EXHAUST FAN STAGE 2 SETPOINT AT HIGH SPEED
Setpoint for OA damper position when exhaust fan1 is powered by the
economizer. Only used when AUX1---O is set to EHX2.