Carrier WeatherMaker 48TC A/B07 Series, Installation Instructions Manual

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48
LEGEND
* Table 12 illustrates the complete hierarchy. Your menu parameters
may be different depending on your configuration. For example if you
do not have a DCV (CO
2
) sensor, then none of the DCV parameters
appear.
† When values are displayed, pressing and holding the or button
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.
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 OCCUPIED jumper JMP1 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 13. For dry bulb operation with a 1-speed indoor
fan, with or without DCV, see Tables 14 and 15. For enthalpy op -
eration with a 1-speed indoor fan, with or without DCV, see Tables
16 and 17. For dry bulb operation with a 2-speed indoor fan, with
or without DCV, see Tables 18 and 19. For enthalpy operation
with a 2-speed indoor fan, with or without DCV, see Tables 20 and
21.
ALARMS
(cont)
RA SYLK T ERR N/A N/A RETURN AIR S-BUS SENSOR ERROR
Return air enthalpy sensor has failed or become disconnected - check
wiring, then replace sensor if the alarm continues.
RA SYLK H ERR N/A N/A
DA SYLK T ERR N/A N/A DISCHARGE AIR S-BUS SENSOR ERROR
Discharge air sensor has failed or become disconnected - check wiring,
then replace sensor if the alarm continues.
OA SENS T ERR N/A N/A OUTSIDE AIR TEMPERATURE SENSOR ERROR
Outdoor air temperature sensor has failed or become disconnected -
check wiring, then replace if the alarm continues.
ACT ERROR N/A N/A ACTUATOR ERROR
Actuator has failed or become disconnected - check for stall, over voltage,
under voltage and actuator count. Replace actuator if damper is movable
and supply voltage is between 21.6-v and 26.4-v. Check actuator count on
STATUS menu.
FREEZE ALARM N/A N/A Check if outdoor temperature is below the LOW Temp Lockout on set
point menu. Check if Mixed air temperature on STATUS menu is below
the Lo Set point on Advanced menu. When conditions are back in normal
range, then the alarm will go away.
SHUTDOWN ACTIVE N/A N/A AUX2 IN is programmed for SHUTDOWN and 24-v has been applied to
AUX2 IN terminal.
DMP CAL RUNNING N/A N/A DAMPER CALIBRATION ROUTINE RUNNING
If DCV Auto enable has been programmed, when the W7220 is complet-
ing a calibration on the dampers, this alarm will display. Wait until the cali-
bration is completed and the alarm will go away. Must have OA, MA and
RA sensors for DCV calibration; set up in the Advanced setup menu.
DA SENS ALM N/A N/A DISCHARGE AIR TEMPERATURE SENSOR ALARM
Discharge air temperature is out of the range set in the ADVANCED
SETUP Menu. Check the temperature of the discharge air.
SYS ALARM N/A N/A When AUX1-0 is set to SYS and there is any alarm (e.g., failed sensors,
etc.), the AUX1-0 terminal has 24 vac out.
ACT UNDER V N/A N/A ACTUATOR VOLTAGE LOW
Voltage received by actuator is above expected range.
ACT OVER V N/A N/A ACTUATOR VOLTAGE HIGH
Voltage received by actuator is below expected range.
ACT STALLED N/A N/A ACTUATOR STALLED
Actuator stopped before achieving commanded position.
Table 12 — Menu Structure* (cont)
MENU PARAMETER
PARAMETER
DEFAULT
VALUE
PARAMETER
RANGE AND
INCREMENT †
NOTES
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