Carrier 33ZCVAVTRM Specifications download pdf (Page 56)

6. The zone controller will send all system zone dampers to

their configured minimum positions and display the

values. Check the system bypass pressure and set the

pressure set point. Adjust minimum damper set points if

required.

7. If the user forces any zones to a new position, the new

position is written to the zone’s minimum damper posi-

tion configuration value and the damper is repositioned.

8. Enable the Position Single Zone point.

9. The zone controller will send all system zone dampers to

their configured maximum positions and display the

values.

10. If the user forces any zones to a new position, the new po-

sition is written to the zone’s maximum damper position

configuration value and the damper is repositioned.

11. At this time, the user can force the Bypass Pressure set

point. Typically, the maximum unit rated duct static is

used. The zone controller will then write the forced

Bypass Pressure set point to the set point table in the

Bypass Controller by communicating over the network.

The bypass controller will then begin to control to the

new bypass pressure set point.

Status Table — The following sections describe the com-

puter status screen which is used to determine status the zone

controller. The screens shown may be displayed differently

when using different Carrier software. See Table 4.

TERMINAL MODE — The terminal mode is determined by

the equipment mode as reported by linkage and space require-

ments determined by space temperature and set points. The

ZONE_BAL and COMMISS modes are the result of the

activating the commissioning maintenance table to perform

terminal testing and commissioning.

Terminal Mode:Display Units ASCII

Default Value COOL

Display Range HEAT, COOL, VENT,

REHEAT, PRESSURE,

EVAC,OFF,ZONE_BAL,

COMMISS

Network Access Read only

TERMINAL TYPE — Terminal type is the confirmation of

the terminal type configuration in the CONFIG Service Config

table.

Terminal Type: Display Units ASCII

Default value SINGLDUCT

Display Range SINGLDUCT, PAR

FAN, SER FAN

Network Access Read only

CONTROLLING SETPOINT — Controlling Set Point will

display either the heating master reference or the cooling mas-

ter reference depending upon what mode the terminal is in. The

display will default to the heating master reference and display

the last controlling master reference when in neither heating

nor cooling.

Controlling

Setpoint: Display Units F (C)

Default Value –40

Display Range –40 to 245

Network Access Read only

SPACE TEMPERATURE — Space temperature from 10 kΩ

thermistor (Type II) located in the space. The point name of the

displayed Space Temperature is “SPACE_T” in this status dis-

play table. This point may be forced for diagnostic purposes.

A non-displayed variable named SPT also exists within the

zone controller as a writeable point for normal operations with

a System Pilot or other devices that will write a space tempera-

ture to the zone controller. The zone controller verifies that the

SPT point is being written to before using it to update the

SPACE_T point. Values that are received at the SPT point may

be averaged with the hardware space temperature input.

Space

Temperature: Display Units F (C)

Default Value –40.0

Display Range –40.0 to 245.0

Network Access Read/Write

DAMPER POSITION — Damper position percent range of

rotation determined by the transducer calibration procedure.

The zone controller is designed be used on dampers with any

range of rotation.

Damper

Position: Display Units % open

Default Value 0

Display Range 0 to 100

Network Access Read only

SUPPLY AIR TEMPERATURE — This reading is the tem-

perature of the air provided by the air source. If ducted heat is

present, this sensor may be relocated to measure temperature of

the air leaving the zone controller downstream of any ducted

heat source. Measured by a 10 kΩ thermistor (Type II). This

temperature may be used to control the maximum discharge air

to the space when local heat is active. The local SAT Installed

configuration is used to enable or disable this sensor.

Supply

Air Temperature: Display Units F (C)

Default Value 0.0

Display Range –40.0 to 245.0

Network Access Read/Write

LOCAL HEATING CAPACITY — When local heat at the

terminal is enabled the percent of heat being delivered is deter-

mined by the following formula for modulating (floating point)

type heat:

% Capacity = [(SAT - SPT)/(Maximum Duct Temp – SPT)]

The percent of heat delivered is determined by the follow-

ing for two-position hot water or staged electric heat:

% Output Capacity = (no. of active stages/Total stages) * 100

Local Heating

Capacity: Display Units % output capacity

Default Value 0

Display range 0 to 100

Network Access Read only

TERMINAL FAN — The commanded output for the terminal

fan on a fan powered terminal.

Terminal Fan: Display Units Discrete ASCII

Default Value Off

Display Range Off/On

Network Access Read/Write

RELATIVE HUMIDITY — Space Relative Humidity read-

ing from the optional relative humidity sensor. The humidity

reading is used for display and monitoring purposes only.

Relative

Humidity: Display Units % RH

Default Value 0

Display Range 0 to 100

Network Access Read/Write

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Carrier 33ZCVAVTRM Specifications Page 56

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