Carrier 33ZCVAVTRM Specifications download pdf (Page 311)

Last Unoccupied Day

— This variable displays the last day

when the zone changed from occupied to unoccupied mode.

This point is read in conjunction with the last unoccupied time

to allow the user to know the last time and day when the zone

became unoccupied. If the zone controller is following a global

schedule this point will remain at default.

Last Unoccupied

Day: Display Range MON, TUE, WED,

THU, FRI, SAT, SUN

Default Value No display (Blank)

Network Access None

Last Unoccupied Time

— This variable displays the last time

of day when the zone changed from occupied to unoccupied

mode. This point is read in conjunction with the last unoccu-

pied day to allow the user to know the last time and day when a

zone became unoccupied. If the zone controller is following a

global schedule this point will remain at default.

Last Unoccupied

Time: Display Range 00:00 to 24:00

Default Value 0:00

Network Access None

ZONE AIR BALANCE/COMMISSIONING TABLE —

The Zone Air Balance/Commissioning Table is used to display

the air balance variables. See Table 15.

Commissioning Mode

— This variable is used to put the zone

controller into the commissioning mode. Force this point to en-

able. The zone controller will be ready to accept a command to

perform the tests and functions on this screen.

NOTE: Commissioning mode will automatically be dis-

abled after one hour.

Commissioning

Mode: Display Range Dsable/Enable

Default Value Dsable

Network Access Read /Write

Damper Actuator/Transducer Calibration

— The Damper

Actuator Transducer calibration is the first calibration which

should be performed on a newly installed actuator. The zone

controller will command the actuator to close and read the

feedback potentiometer to determine the zero position of the

damper. It will then command the damper to fully open. The

zone controller will read the potentiometer to determine the

maximum open position. Damper positions from closed to

maximum open will be scaled to read 0 to 100% for the damp-

er position.

The zone controller will then close the damper and open it

once more to zero calibrate the airflow sensor. The entire

calibration procedure can take up to 3 minutes. If the damper

fails the test or the airflow calibration is unable to be complet-

ed, the Auto-Calibration point will indicate an Alarm.

Damper Actuator

Transducer

Calibration: Display Range Dsable/Enable

Default Value Dsable

Network Access Read /Write

Maximum Cooling Airflow Calibration

— By enabling the

Maximum Cooling Airflow Calibration, the Maximum Cool-

ing Airflow from the set point schedule will be made the Air-

flow CFM Set Point. The zone controller will modulate the

damper to control to this set point. The actual airflow, damper

position, and velocity pressure readings will be displayed.

If the set point is not correct, it may be changed from this

screen by forcing the airflow set point to the desired value. The

value will be written to the set point schedule in the Maximum

Cool CFM set point, and the zone controller will begin to con-

trol to the new value.

The airflow can be measured using test and balance equip-

ment and compared to the actual reading on the screen. If the

value measured requires adjustment to the value on the screen,

force the value on the screen to the value measured. The zone

controller will take the value and calculate a new calibration

gain which will be shown at the bottom of the screen. The new

value will be automatically loaded into the Service Configura-

tion table.

Maximum Cooling

Airflow

Calibration: Display Range Dsable/Enable

Default Value Dsable

Network Access Read /Write

Minimum Cooling Airflow Calibration

— Enabling the Min-

imum Cooling Airflow Calibration will cause the airflow CFM

set point to change to the Minimum Cooling set point. The ac-

tual airflow, damper position, and velocity pressure readings

will be displayed.

If the set point is not correct, it may be changed from this

screen by forcing the Airflow set point to the desired value.

The value will be written to the set point schedule in the Mini-

mum Cool CFM set point, and the zone controller will begin to

control to the new value.

The airflow can be measured using test and balance equip-

ment and compared to the actual reading on the screen. If the

value measured requires adjustment to the value on the screen,

force the value on the screen to the value measured. The zone

controller will take the value and calculate a new offset.

→

Table 15 — Zone Air Balance/Commissioning Table

DESCRIPTION DEFAULT POINT NAME

Commissioning Mode

Dsable CMODE

Damper/Transducer Calibration

Dsable CALIBRAT

Maximum Cooling

Dsable MAXCOOL

Minimum Cooling

Dsable MINCOOL

Heating Override

Dsable HEATOVER

Fan Override

Dsable FANOVER

CFM Set Point

0 cfm COMCFM

Actual Airflow

0 cfm AIRFLOW

Primary Damper Position

100 % DMPPOS

Measured Velocity Pressure

0.000 in. wg MVP

Supply Air Temperature

0.0 F SAT

Auto-Calibration

Normal CAL

Calibration Gain

1.000 CAL_GAIN

501

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Carrier 33ZCVAVTRM Specifications Page 311

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