Carrier WeatherMaster 50HC*A07 Series, Installation Instructions Manual

Page: 38 / 52

38
Table 8 — Menu Structure (cont)
MENU PARAMETER
PARAMETER
DEFAULT
VALUE
PARAMETER
RANGE AND
INCREMENT
†
NOTES
STATUS (CONT)
EXH2 OUT OFF ON/OFF EXHAUST STAGE 2 RELAY OUTPUT
Output of AUX1 O terminal Displays ON when damper position reaches
programmed percentage setpoint
ON = 24 Vac Output, OFF = No Output; displays only if AUX1 O = EXH2
ERV OFF ON/OFF ENERGY RECOVERY UNIT RELAY OUTPUT
Output of AUX1 O terminal, ON = 24 Vac Output, OFF = No Output;
displays only if AUX1 O = ERV
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 pymp 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
(12°C)
38 to 70°F
(3 to 21°C);
increment by 1 SUPPLY AIR SETPOINT
Setpoint determines where the economizer will modulate the OA damper
to maintain the mixed air temperature. See 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. Commonly referred to as the Compressor lockout. At
or below the setpoint the Y1-O and Y2-O will not be energized on the con-
troller.
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 tem-
perature 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 Note 3
ENTH CURVE ES3
ES1,ES2,ES3,ES4,
or ES5
ENTHALPY CHANGEOVER CURVE
(Re
q uires enthalpy sensor option)
Enthalpy boundary “curves” for economizing using single enthalpy.
See page 45 for description of enthalpy curves.
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 2.8 V 2 to 10 Vdc
VENTILATION MINIMUM POSITION
Displays ONLY if a CO
2
sensor is NOT connected.
With 2-speed fan units MIN POS L (low speed fan) and MIN POS H (high
speed fan) settings are re
q uired. Default for MIN POS L is 3.2V and MIN
POS H is 2.8V
VENTMAX 2.8 V
2 to 10 Vdc
DCV MAXIMUM DAMPER POSITION
Displays only if a CO
2
sensor is connected. Used for Vbz (ventilation max
cfm) setpoint. VENTMAX is the same setting as MIN POS would be with-
out the CO
2
sensor
100 to 9990 cfm;
increment by 10
If OA, MA, RA, and CO
2
sensors are connected and DCV CAL ENABLE is
set to AUTO mode, the OA dampers are controlled by CFM and displays
from 100 to 9990 CFM.
2 to 10 Vdc
With 2-speed fan units VENT L (low speed fan) and VENTMAX H (high
speed fan) settings are re
q uired. Default for VENTMAX L is 3.2V and
VENTMAX H is 2.8V
VENTMIN 2.25 V
2 to 10 Vdc
DCV MINIMUM DAMPER POSITION
Displays only if CO
2
sensor is connected. Used for Va (ventilation min
cfm) setpoint. This is the ventilation re q uirement for less than maximum
occupancy of the space.
100 to 9990 cfm;
increment by 10
If OA, MA, RA, and CO
2
sensors are connected and DCV CAL ENABLE is
set to AUTO mode, the OA dampers are controlled by CFM and displays
from 100 to 9990 CFM.
2 to 10 Vdc
With 2-speed fan units VENTMIN L (low speed fan) and VENTMIN H
(high speed fan) settings are re
q uired. Default for VENTMIN L is 2.5V and
VENTMIN H is 2.25V.
ERV OAT SP
††
32°F
(0°C)
0 to 50°F;
(-18 to 10°C)
increment by 1 ENERGY RECOVERY VENTILATOR UNIT OUTDOOR AIR TEMPERA-
TURE SETPOINT
Only when AUX1 O = ERV
EXH1 SET 50%
0 to 100%; increment
by 1
EXHAUST FAN STAGE 1 SETPOINT
Setpoint for OA damper position when exhaust fan 1 is powered by the
economizer.
With 2-speed fan units Exh1 L (low speed fan) and Exh1 H (high speed
fan) settings are re
q uired. Default for Exh1 L is 65% and Exh1 H is 50%
EXH2 SET 75%
0 to 100%; increment
by 1
EXHAUST FAN STAGE 2 SETPOINT
Setpoint for OA damper position when exhaust fan 2 is powered by the
economizer. Only used when AUX1 O is set to EHX2.
With 2-speed fan units Exh2 L (low speed fan) and Exh2 H (high speed
fan) settings are re
q uired. Default for Exh2 L is 80% and Exh2 H is 75%