Carrier 33ZCFANTRM, 33ZCVAVTRM, 33ZCSECTRM specifications → Zone Air Balance/Commissioning Table

→ 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

Heating Override — This variable can be used to test the heat outputs. Enabling this variable will cause the heat to be modu- lated 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	Dsable/Enable
Default Value	Dsable
Network Access	Read /Write

Airflow CFM Set Point — This variable displays the current airflow set point that the zone controller is controlling to. Dur- ing the calibration tests this value can be forced, which will change the set point configuration for the value being tested.

Airflow CFM
Set Point:	Display Units	CFM
	Display Range	0 to 9999 (Limited by
	velocity pressure transducer high alarm
	limit)
	Default Value	0
	Network Access	Read /Write

Actual Airflow Display — This variable shows the actual air- flow being measured, based on the inlet size configured. Dur- ing the Maximum and Minimum Cooling Airflow calibration tests this value can be forced, which will correct the multiplier or offset used to calculate the airflow.

Actual Airflow: Display Units	CFM
Display Range	0 to 9999 (Limited by
velocity pressure transducer high alarm
limit)
Default Value	0
Network Access	Read /Write

Primary Damper Position — This variable displays the cur- rent 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.

Primary Damper
Position:	Display Units	% (open)
	Display Range	0 to 100
	Default Value	100
	Network Access	Read Only

Measured Velocity Pressure — This variable displays the measured velocity pressure, which is used to check accuracy during test and balancing of the terminal. If the pressure appears to be much different than that measured with a Magna- helic gage, the transducer can be forced to recalibrate its zero by enabling the Damper/Transducer Calibration.

Measured Velocity
Pressure:	Display Units	in. wg

Display Range 0.000 to 2.000 (Limited by velocity pressure transducer high alarm limit)

Default Value	0.000
Network Access	Read Only

Supply-Air Temperature — This variable displays the supply- air temperature for ease of verifying the heat operation 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

Auto-Calibration — This variable will display “Normal” if the actuator and airflow transducer calibrations 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).

Auto-Calibration: Display Range	Normal/Alarm
Default Value	Normal
Network Access	Read Only

Calibration Gain — Air terminal testing by industry standards is done with straight duct, upstream of the terminal. Since most applications are not installed in this manner, the actual airflow from the terminal, at balancing, may not equal the reading from the zone controller.

The Calibration Gain is used for making fine tuning adjust- ments to the airflow calculation. This number is calculated au- tomatically by the zone controller after input to the air balance maintenance screen. The Calibration Gain can also be entered manually in the service configuration CONFIG screen.

A number of .95 entered into the Calibration Gain variable will cause the maximum airflow to be reduced to 95% of the calculated value. A number of 1.05 would cause readings to become 5% higher. The Calibration Gain is adjusted on the Air Balance maintenance screen when performing the Maximum Airflow Calibration and will have the greatest affect on the air- flow at maximum CFM.

After performing the air balance procedure using the air bal- ance maintenance screen, it is recommended to upload and save the Airflow Configuration, Calibration Gain, and Offset settings.

Calibration Gain: Display Range	0.000 to 9.999
Default Value	1.000
Network Access	Read Only

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