Carrier 48TC D/E17 Series, Installation Instructions Manual

Page: 38 / 64

38
STATUS
(cont)
EXH2 OUT OFF ON/OFF
EXHAUST STAGE 2 RELAY OUTPUT
Output of AUX terminal; displays only if AUX = EXH2
ERV OFF ON/OFF
ENERGY RECOVERY VENTILATOR
Output of AUX terminal; displays only if AUX = 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 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 53F
38°F to 65°F
(3°C to 18°C);
increment by 1°F
SUPPLY AIR SETPOINT
Setpoint determines where the economizer will modulate the OA
damper to maintain the mixed air temperature.
LOW T LOCK 32F
–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 63F
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.
ENTH CURVE ES3
ES1,ES2,ES3,
ES4, or ES5
ENTHALPY CHANGEOVER CURVE
Enthalpy boundary “curves” for economizing using single
enthalpy.
DCV SET 1100ppm
500 to 2000ppm;
increment by 100
DEMAND CONTROLLED VENTILATION
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.
VENTMAX
With 2-speed fan units
VENTMAX L (low speed
fan) and VENTMAX H
(high speed fan) settings
are required
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. Displays 2 to 10 V if <3 sensors
(RA,OA, and MA). In AUTO mode dampers controlled by CFM.
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 MIN POS H
(high speed fan) settings are required. Default for VENTMAX L
is 3.2V and VENTMAX H is 2.8V
VENTMIN
With 2-speed fan units
VENTMIN L (low speed
fan) and VENTMIN
H (high speed fan) set
2.25 V
2 to 10 Vdc or 100
to 9990 cfm
increment by 10
DCV MINIMUM DAMPER POSITION
Displays only if a CO
2
sensor is connected. Used for Ba
(ventilation min cfm) setpoint. Displays 2 to 10 V if <3 sensors
(RA, OA, and MA). Va is only set if DCV is used. This is the
ventilation for less than maximum occupancy of the space. In
AUTO mode dampers controlled by CFM.
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 MIN
POS H (high speed fan) settings are required. Default for
VENTMIN L is 3.2V and VENTMIN H is 2.8V
ERV OAT SP 32°F
0°F to 50°F
(–18°C to 10°C);
increment by 1°F
ENERGY RECOVERY VENTILATOR UNIT OUTDOOR AIR
TEMPERATURE SETPOINT
Only when AUX1 O = ERV
EXH1 SET
With 2-speed fan units
Exh1 L (low speed fan)
and Exh1 H (high speed
fan) settings are required
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 required. Default for Exh1 L is 65% and
Exh1 H is 50%
EXH2 SET
With 2-speed fan units
Exh2 L (low speed fan)
and Exh2 H (high speed
fan) settings are required
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 required. Default for Exh2 L is 80% and
Exh2 H is 75%
Table 12 — Menu Structure (cont)
MENU PARAMETER
PARAMETER
DEFAULT
VALUE
PARAMETER
RANGE AND
INCREMENT
NOTES