Carrier WeatherExpert 48LC Series Service And Maintenance Instructions page 43

MENU PARAMETER
ACT UNDER V
ALARMS
ACT OVER V
(cont)
ACT STALLED
LEGEND
CLO — Compressor Lockout
ERV — Energy Recovery Ventilator
LCD — Liquid Crystal Display
MA — Mixed Air
MAT — Mixed Air Temperature
N/A — Not Applicable
OA — Outdoor Air
OAT — Outdoor Air Temperature
OCC — Occupied
RA — Return Air
RAT — Return Air Temperature
RTU — Rooftop Unit
SYS — System
* Table 19 illustrates the complete hierarchy. Your menu parameters
may be different depending on your configuration. For example if you
do not have a DCV (CO ) sensor, then none of the DCV parameters
2
appear.
† When values are displayed, pressing and holding the
causes the display to automatically increment.
** N/A = Not Applicable.
†† ERV Operation: When in cooling mode AND the conditions are NOT
OK for economizing - the ERV terminal will be energized. In the Heat-
ing mode, the ERV terminal will be energized when the OA is below
the ERV OAT set point in the set point menu.
*** After 10 minutes without a command or mode change, the controller
will change to normal operation.
Table 20 — Damper Minimum Position Settings and Readings on Checkout Menu
FAN SPEED
1
Table 21 — Dry Bulb Operation Without DCV (CO
DEMAND
CONTROLLED
VENTILATION (DCV)
NONE
*With stage 3 delay (STG3 DLY) in Advanced setup menu can turn on second stage of mechanical cooling Y2–O after the delay if the call for Y–I and
Y2–I have not been satisfied.
Table 19 — W7220 Menu Structure* (cont)
PARAMETER
DEFAULT
VALUE
N/A
N/A
N/A
or button
DEMAND CONTROLLED
VENTILATION
(CO SENSOR)
2
NO
YES
OUTSIDE AIR
GOOD TO Y1-I Y2-I
ECONOMIZE
Off Off
No On Off
On On
Off Off
On Off
Yes
On On
PARAMETER
RANGE AND
INCREMENT
†
ACTUATOR VOLTAGE LOW
N/A
Voltage received by actuator is above expected range.
ACTUATOR VOLTAGE HIGH
N/A
Voltage received by actuator is below expected range.
ACTUATOR STALLED
N/A
Actuator stopped before achieving commanded position.
NOTES:
1. STATUS —> OCCUPIED — The factory-standard Occupancy sig-
nal originates with a thermostat or other controller call for indoor
fan operation at CTB terminal G. This signal passes through the
Central Terminal Board's OCCUPANCY jumper to the ECONO
connector and to the W7220's OCC input terminal. An external
timeclock or relay is required to implement an Occupancy schedule
on the economizer damper position.
2. STATUS —> MA TEMP, SETPOINTS —> MAT SET — The W7220
menu parameters and labels include designations MA, MAT and
Mixed Air for the economizer cooling control sensor. On these roof-
top units, the economizer control sensor is located downstream of
the evaporator/indoor coil in the supply fan section where this sen-
sor is designated as Supply Air Temperature (SAT) sensor.
3. SETPOINTS —> DRYBLB SET — This point is not displayed if a
Return Air (differential) temperature sensor or an Outdoor Air
enthalpy sensor is connected.
4. SYSTEM SETUP parameters must be configured as noted for 2-
Speed unit operation:
EQUIPMENT = CONV
AUX2 I = W
FAN SPEED = 2SPEED
For damper minimum position settings and checkout menu read-
ings, see Table 20. For dry bulb operation with or without DCV,
see Tables 21 and 22. For enthalpy operation with or without
DCV, see Tables 23 and 24.
SETPOINTS
MIN POS
N/A
VENT MIN
VENT MAX
Sensor) — 1 Speed Fan
2
FAN SPEED Y1-O
High 0-v/Off
High 24-v/On
High 24-v/On
High 0-v/Off
High 0-v/Off
High 24-v/On
43
EXPANDED PARAMETER NAME
Notes
CHECKOUT
VMAX–HS
N/A
VMAX–HS
VMAX–HS
Y2-O OCCUPIED
0-v/Off MIN POS
0-v/Off MIN POS
24-v/On MIN POS
0-v/Off MIN POS
MIN POS to
0-v/Off
Full-Open
MIN POS to
0-v/Off*
Full-Open
UNOCCUPIED
Closed
Closed
Closed
Closed
Closed to
Full-Open
Closed to
Full-Open