Setup And Configuration - Carrier WeatherMaster 48HC Series Installation Instructions Manual

the cooling coil. This unit application has the control sensor locat-
ed after the cooling coil, in the fan section, where it is designated
as (Cooling) Supply Air Temperature or SAT sensor.

SETUP AND CONFIGURATION

Before being placed into service, the W7220 Economizer module
must be set up and configured for the installed system.
IMPORTANT: During setup, the economizer module is
live at all times.
MENU
ECONOMIZING
COOL Y1—OUT
COOL Y2—OUT
STATUS
Downloaded from ManualsNet.com
Table 13 — W7220 Menu Structure*
PARAMETER
PARAMETER DEFAULT
VALUE
ECON AVAIL NO
NO
OCCUPIED NO
HEAT PUMP N/A**
COOL Y1—IN OFF
OFF
COOL Y2—IN OFF
OFF
_ _ . _ °F
MA TEMP
(or _ _ . _ °C)
_ _ . _ °F
DA TEMP
(or _ _ . _ °C)
_ _ . _ °F
OA TEMP
(or _ _ . _ °C)
OA HUM _ _ %
_ _ . _ °F
RA TEMP
(or _ _ . _ °C)
RA HUM _ _ %
IN CO2 _ _ _ ppm
DCV STATUS N/A
search engine
The setup process uses a hierarchical menu structure that is easy to
use. Press the ▲ and ▼ arrow buttons to move forward and back-
ward through the menus and press the button to select and confirm
setup item changes.
Time-Out and Screensaver
When no buttons have been pressed for 10 minutes, the LCD dis-
plays a screen saver, which cycles through the Status items. Each
Status items displays in turn and cycles to the next item after
5 seconds.
PARAMETER
RANGE AND
INCREMENT †
FIRST STAGE COOLING DEMAND (Y1–IN)
YES/NO YES = economizing available; the system can use outside air for
free cooling when required
FIRST STAGE COOLING RELAY OUTPUT
YES/NO
YES = outside air being used for first stage cooling
OCCUPIED
YES = OCC signal received from space thermostat or unitary
YES/NO controller
YES = 24 vac on terminal OCC
NO = 0 vac on terminal OCC
COOL HEAT PUMP MODE
Displays COOL or HEAT when system is set to heat pump
HEAT (Non-conventional)
FIRST STAGE COOLING DEMAND (Y1-IN)
Y1–I signal from space thermostat or unitary controller for cooling
ON/OFF stage 1.
ON = 24 vac on terminal Y1–I
OFF = 0 vac on terminal Y1–I
FIRST STAGE COOLING RELAY OUTPUT
ON/OFF Cool stage 1 Relay Output to stage 1 mechanical cooling
(Y1–OUT terminal)
SECOND STAGE COOLING DEMAND (Y2–IN)
Y2–I signal from space thermostat or unitary controller for
ON/OFF second stage cooling.
ON = 24 vac on terminal Y2–I
OFF = 0 vac on terminal Y2–I
SECOND STAGE COOLING RELAY OUTPUT
ON/OFF Cool Stage 2 Relay Output to mechanical cooling
(Y2–OUT terminal)
SUPPLY AIR TEMPERATURE, Cooling Mode
–40°F to 150°F
Displays value of measured mixed air from MAT sensor.
(–40°C to 66°C)
Displays _ _ . _ F if not connected, short or out of range.
DISCHARGE AIR TEMPERATURE, after Heating section
Displays when Discharge Air Sylk Bus sensor is connected and
–40°F to 150°F
displays measured discharge temperature.
(–40°C to 66°C)
Displays _ _ . _F if sensor sends invalid value, if not connected,
short or out of range.
OUTSIDE AIR TEMP
–40°F to 140°F Displays measured value of outdoor air temperature.
(–40°C to 60°C) Displays _ _ . _F if sensor sends invalid value, short or out of
range.
OUTSIDE AIR RELATIVE HUMIDITY
Displays measured value of outdoor humidity from OA Sylk Bus
0 to 100%
sensor.
Displays _ _% if not connected short, or out of range.
RETURN AIR TEMPERATURE
Displays measured value of return air temperature from RAT
0°F to 140°F
Sylk Bus sensor.
(–18°C to 60°C)
Displays _ _ . _ F if sensor sends invalid value, if not connected,
short or out of range
RETURN AIR RELATIVE HUMIDITY
Displays measured value of return air humidity from RA Sylk Bus
0 to 100% sensor.
Displays _ _% if sensor sends invalid value, if not connected,
short or out of range
SPACE/RETURN AIR CO
Displays value of measured CO
0 to 2000 ppm
connected, short or out of range. May be adjusted in Advanced
menu by Zero offset and Span.
DEMAND CONTROLLED VENTILATION STATUS
ON/OFF Displays ON if above set point and OFF if below set point, and
ONLY if a CO
44
EXPANDED PARAMETER NAME
Notes
2
from CO sensor. Invalid if not
2 2
sensor is connected.
2