Carrier Air Conditioner Models: 33ZCFANTRM and 33ZCVAVTRM Manual

4.If the terminal is a parallel or series powered fan box, force the Fan Override to Enable. If the damper is open it may have to be repositioned to the proper position depending on the box type. Damper percent change will be displayed. After the damper is positioned cor- rectly, the fan relay should energize and the fan should run for a few seconds.

5.Make sure the fan runs and the Fan Override decision returns to disabled to ensure the fan is wired correctly for proper operation.

6.Force the Heating Override to Enable. If the unit is a single duct unit, this must be done with the primary terminal at reheat set point. The damper will modulate to maintain the terminal reheat CFM. The heat outputs will be commanded to provide maximum heat. If the unit is a fan powered terminal, the fan must be on.

NOTE: The CFM settings can be found under service con- figuration in the table AIRFLOW.

CONFIGURATION

The following sections describe the computer configuration screens which are used to configure the zone controller. The screens shown may be displayed differently when using differ- ent Carrier software.

Points Display Screen — The Points Display screen allows the user to view the status of the air terminal controller points. 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 ZEROCAL and COMMISS modes are the result of the activat- ing the commissioning maintenance table to perform terminal testing and commissioning.

Terminal Mode: Display Units	ASCII
Default Value	COOL
Display Range	HEAT, COOL, VENT,
FAN AND VENT, DEHUMID, WARM-
UP, REHEAT, PRESSURE, EVAC, OFF,
ZEROCAL, COMMISS
Network Access	Read only

TERMINAL TYPE — Terminal type is the confirmation of the terminal type configuration in the SERVCONF Service Config table.

Terminal Type: Display Units	ASCII
Default value	SINGLDUCT
Display Range	SINGLDUCT, PAR
FAN, SER FAN, DUALDUCT
Network Access	Read only

→CONTROLLING SETPOINT — Controlling Setpoint 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 III) located in the space.

Space
Temperature:	Display Units	F (C)
	Default Value	-40.0
	Display Range	-40.0 to 245.0
	Network Access	Read/Write

PRIMARY AIRFLOW — Volume of primary air calculated for pressure reading from the velocity pressure pickup probe located in the input collar of the air terminal.

Primary Airflow: Display Units	cfm
Default Value	0
Display Range	0 to 9999
Network Access	Read/Write

PRIMARY DAMPER POSITION — Damper position per- cent range of rotation determined by the transducer calibration procedure. The zone controller is designed be used on dampers with any range of rotation.

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

→ Table 4 — Points Display Screen

DESCRIPTION	DEFAULT	POINT NAME
Terminal Mode	COOL	MODE
Terminal Type	SINGLDUCT	TYPE
Controlling Setpoint	-40.0 F	CNTSP
Space Temperature	-40.0 F	SPT
Primary Airflow	0 cfm	PRIFLO
Primary Damper Position	100 %	DMPPOS
Supply Air Temperature	0.0 F	SAT
Local Heating Capacity	0 %	HCAP
Terminal Fan	Off	FAN
Relative Humidity	0 % RH	RH
Air Quality (ppm)	0 ppm	AQ
Secondary Airflow	0 cfm	SECFLO
Primary Air Temperature	0.0 F	PATEMP
Heat	Dsable	HEAT

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