Carrier 33ZCVAVTRM Specifications download pdf (Page 79)

Table 23 — Zone Commissioning Maintenance Table

COMMISSIONING MODE — This variable is used to put

the zone controller into the commissioning mode. Force this

point to enable. 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 Disable/Enable

Default Value Disable

Network Access Read /Write

DAMPER ACTUATOR CALIBRATION — The Damper

Actuator calibration is the first calibration which should be per-

formed on a newly installed actuator. The zone controller will

command the actuator to close and read the feedback potenti-

ometer 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 damper 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

Calibration: Display Range Disable/Enable

Default Value Disable

Network Access Read /Write

FAN OVERRIDE — This variable can be used to test the fan

on series and parallel fan powered terminals. Enabling this

point will cause the terminal fan to run until this point is dis-

abled or the commissioning mode is ended.

Fan Override: Display Range Disable/Enable

Default Value Disable

Network Access Read /Write

HEATING OVERRIDE — This variable can be used to test

the heat outputs. Enabling this variable will cause the heat to be

modulated or staged to full heat until this point is disabled or

the force released. Ducted reheat operation will be controlled

so as not to exceed the configured maximum duct temperature.

The supply-air temperature is included on this screen to verify

that the heat is operating.

Heating Override: Display Range Disable/Enable

Default Value Disable

Network Access Read /Write

DAMPER POSITION — This variable displays the current

damper position. During CFM Balancing, this variable is used

to display the position of the damper. This value can be used to

see if the damper is fully open and the system air is sufficient.

Damper

Position: Display Units % (open)

Display Range 0 to 100

Default Value 100

Network Access Read Only

SUPPLY-AIR TEMPERATURE — This variable displays

the supply-air temperature for ease of verifying the heat opera-

tion during the heat test.

Supply-Air

Temperature: Display Units F (C)

Display Range –40.0 to 245.0

Default Value 0.0

Network Access Read /Write

DAMPER CALIBRATION STATUS — This variable will

display “Normal” if the actuator and airflow transducer calibra-

tions are successful. If damper or transducer calibration was

not successful, this point will display “Alarm” and the zone

controller will broadcast the appropriate alarm (if configured to

transmit alarms).

Damper

Calibration Status: Display Range Normal/Alarm

Default Value Normal

Network Access Read Only

OPERATION

System Mode Selection —

The Linkage Coordinator

will determine whether the system as a whole requires heating

or cooling and whether the air source will operate in occupied

or unoccupied mode. This will be determined by obtaining the

heating or cooling needs of each zone and adjusting for the

duct size of the zones and calculating an average cool demand

(ACD) and average heat demand (AHD) as well as its

occupancy mode. The Linkage Coordinator will be the highest

addressed zone controller of all zones that are served by

the same air source equipment and it will obtain this informa-

tion when it scans all its associated zones on approximately

1-minute intervals.

When using the Occupied Heating Set Point (OHS) or

Occupied Cooling Set Point (OCS) the actual configured val-

ues will be used including T56 biased offset (if present) as the

zone operating set points. The T56 bias is not applied to Unoc-

cupied Heating and Cooling Set Points.

Temperature demand will be used to indicate individual

zone demand and for accumulating the total weighted average

demand for heating and for cooling. If the space temperature

(SPT) is greater than the OCS then the zone demand is cooling

and the space temperature will be used in the ACD. If the SPT

is less than the OHS than the zone demand will be heating and

the space temperature will be used in the AHD. If the SPT is

between the OHS and OCS, the zone will be considered to

have no demand and will not be included in determining the

system mode. Only those zones with a valid SPT of greater

than –40 F, less than 245 F, and a configured damper size

greater than 0 will be included in the calculations.

If any zone is occupied then the Linkage Coordinator will

calculate the ACD and AHD using only the occupied zones. If

no zones are occupied will then the Linkage Coordinator will

calculate the ACD and AHD including all zones in the calcula-

tion. The zone controller then display the ACD, the Max Cool

Demand and Max Cool Demand Zone, the AHD, the Max

Heat Demand Max Cool Demand Zone, the Reference Zone

Demand and Zone Identification for each demand in the

Master Zone maintenance table.

DESCRIPTION VALUE UNITS STATUS FORCE NAME

Commissioning Mode Disable CMODE

Damper Cal Disable CALIBRAT

Fan Override Disable FANOVER

Heating Override Disable HEATOVER

Damper Position 10 %OPEN DMPPOS

Supply Air Temperature 67.1 dF SAT

Damper Cal Status Normal CAL_ALRM

1 2 ... 74 75 76 77 78 79 80 81 82 83 84 ... 315 316

Comments to this Manuals

No comments

Carrier 33ZCVAVTRM Specifications Page 79

Comments to this Manuals

Related products and manuals for Split-system air conditioners Carrier 33ZCVAVTRM