Carrier 33ZCSECTRM, 33ZCFANTRM, 33ZCVAVTRM specifications → - Alarm Limit Configuration Screen

SUPPLY AIR TEMPERATURE — Temperature of the air leaving the zone controller downstream of any ducted heat source. Measured by a 10 kΩ thermistor (Type III). This tem- perature is used to control the maximum discharge air to the space when local heat is active. The sensor is not required or recommended for cooling only terminals. If supply air temper- ature display is required by specification, on a cooling only box, a heat type other than zero must be configured. This will have no adverse affect on the operation of a cooling only terminal.

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 = (# 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. Used by Hu- midity control function if configured.

Relative
Humidity:	Display Units	% RH
	Default Value	0
	Display Range	0 to 100
	Network Access	Read/Write

AIR QUALITY — Indoor air quality reading from a CO2 sen- sor installed in the space. Used by Air Quality control function if configured.

Air Quality (ppm):Display units	None shown (parts per
	million implied)
Default Value	0
Display range	0 to 5000
Network Access	Read/Write

SECONDARY AIRFLOW — Airflow reading from the sec- ondary pressure transducer, supplied with the secondary actua- tor, intended for dual duct and pressure control applications.

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

PRIMARY AIR TEMPERATURE — Primary air tempera- ture from sensor (10 kΩ, Type III), located in main trunk of ductwork for supply air provided by the air-handling equip- ment. Used for linkage coordination.

Primary Air
Temperature:	Display Units	F (C)
	Default Value	0.0
	Display Range	-40.0 to 245.0
	Network Access	Read/Write

HEAT ENABLE/DISABLE — Provides enable/disable function for local heat at the terminal. When enabled the Local heat capacity function will run to operate the terminal heat.

Heat Display:	Display Units	Discrete ASCII
	Default Value	Dsable
	Display Range	Dsabe/Enable
	Network Access	Read/Write

Modify Controller Configuration — In Service Tool software, select the desired zone controller and access the Modify Controller Configuration Menu screen. This configura- tion screen is also displayed under CONFIGURE when using ComfortWORKS® and ComfortVIEW™ software.

The Modify Controller Configuration Menu screen is used to access the Alarm Limit Configuration screen, Controller Identification screen, Holiday Configuration screen, Linkage Coordinator Configuration screen, Occupancy Configuration screen, and Set Point screen.

ALARM LIMIT CONFIGURATION SCREEN — The Alarm Limit Configuration screen is used to configure the alarm settings for the zone controller. See Table 5.

→ Table 5 — Alarm Limit Configuration Screen

DESCRIPTION	DEFAULT	POINT NAME
Alarm Routing Control	00000000	ROUTING
Re-Alarm Time	0	RETIME
SPT Occupied Hysteresis	5.0 F	SPTHYS
Unoccupied SPT
Low Limit	40 F	LOWLIM
High Limit	99 F	HIGHLIM
Occupied RH
Low Limit	10 %	LOWLIM
High Limit	99 %	HIGHLIM
Unoccupied RH
Low Limit	0 %	LOWLIM
High Limit	100 %	HIGHLIM
Air Quality
Low Limit	250 ppm	LOWLIM
High limit	1200 ppm	HIGHLIM
High Velocity Pressure	1.2 in. wg	HIGHVP

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