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Fan Terminal Zone Controller; Fan Coil Controller; VAV Box Controller; Secondary Terminal (Dual Duct) Controller

Secondary Control Units
ComfortID Zone Controllers
Date Last Saved: 2/12/2004 3:39:54 PM

Product Name(s): Fan Terminal Zone Controller; Fan Coil Controller; VAV Box Controller; Secondary Terminal (Dual Duct) Controller
Product Description: The ComfortID Zone Controllers are application-specific, pre-programmed for pressure-independent VAV box controllers. Models are available for specific VAV box configurations (see below). All have integral damper actuators.
Product Application(s): VAV Fan Terminal Zone Controller (33ZCFANTRM): Dedicated to series or parallel fan powered terminals; single-duct terminals with 3 stages of heating; or as a primary controller for dual duct or zone pressurization applications. It is capable of dehumidity control with optional zone humidity sensor. Also capable of Demand Controlled Ventilation with optional zone CO2 sensor. When combined with a field-installed secondary terminal, it is also capable of individual zone pressure control and for individual supply and exhaust control. Secondary Terminal Controller (33ZCSECTRM): Second terminal for dual-duct or zone pressurization applications VAV Single Duct Terminal Controller (33ZCVAVTRM): Dedicated to VAV terminals; single duct terminals with modulating or up to 3 stages of heat. It is capable of dehumidity control with optional zone humidity sensor. Also capable of Demand Controlled Ventilation with optional zone CO2 sensor. Fan Coil Controller (33ZCFANCOL): Dedicated Fan Coil controller; 2 pipe or 4 pipe single or multiple speed applications. 2 stage or modulating heating and cooling. It is capable of dehumidity control with optional zone humidity sensor. Also able to monitor CO2 levels with optional zone CO2 sensor.
Point Quantity Characteristics
Analog Input (AI): 8 Zone temperature sensor
Primary air damper position
Airflow sensor input
Setpoint adjustment from wall sensor
Fan Speed selection (Fan Coil Only)
Opt: Supply temperature sensor
Opt: Primary air temperature sensor
Opt: CO2 or relative humidity sensor
Digital Input (DI): 3 Opt: Remote occupancy contact or Fan Status (Fan Coil Only)
Condensate Switch (Fan Coil Only)
Change-Over (Fan Coil Only)
Universal Input (AI or DI):
Analog Output (AO): 1 VAV Actuator
Digital Output (DO): 2 Heating (floating control; 2-stage; or single state)

Heating Valve (floating control)
Universal Output (UO):
A/D Converter Resolution
8 bit
10 bit
12 bit
16 bit
Other Information not provided
D/A Converter Resolution
6 bit
8 bit
10 bit
No Analog Output
Other Information not provided
HOA switches provided on each output?
Note: These are also available as an add-on from 3rd party vendors.
Both AO and DO
DO Only
Indicating status LED on each output?
AO and DO
AO Only
DO Only
Integral Flow Sensor? Yes. Differential pressure rating 2 in.w.g. Controller can control as low as 10% to as high as 125% of nominal airflow at 3% accuracy.
Integral Damper Actuator? Yes. Rated at 35 lb-in torque, 90° stroke range. Mounts to 3/8" or 1/2" shaft. Designed for either vertical or horizontal mounting.
Can controller accept occupant override from thermostat? Yes
Can controller accept occupancy sensor input? Yes
Expander Boards
Network Ports, Protocol(s), and Speed(s) Supported
(Note: See 'Architecture' for network details)
CCN Bus: Proprietary @ up to 38.4kbps (peer-to-peer)
External Communication Ports, Speeds and Access Devices Level II Port: EIA-232 (through optional RJ14 interface) to local PC (laptop or workstation running Network Service Tool, ComfortVIEW, or ComfortWORKS software).
Additional Information (Optional) Zone Controllers have a 128 controller maximum system (must be located on same CCN Bus segment). Optically isolated repeaters are required every 1000 ft.
Network Accessing Capabilities via Controller
Access controller only
Access controller plus additional controllers on network segment / LAN
Access all controllers on system
No access available on this controller
Controller Access Devices
Local Display Panel (controller-mounted)
Local Display Panel (zone-mounted)
Handheld Interface Device (proprietary device)
PDA (3rd-Party HID)
Zone-Based port (details below)
Zone-Based Interface Access EIA-485 interface through RJ14 connector on all Carrier space sensors. Interface is through Laptop PC running proprietary software.
Zone Interface Hardware
Zone-Mounted touchpad (thermostat or stand-alone display)
HID (proprietary device)
PDA (3rd party HID, with software)
*Note: This section covers the capabilities for accessing the controller or other parts of the network from the controller (i.e. 'bottom-up').
Standard access functionality is covered in the Architecture and Software sections.
**Does NOT include front-end OI functions. See vendor for specific functions available.
Functions Available Through Field Interface**:View ParamsChange ParamsChange
O&M SupportTAB/Cx Support
Local Display Panel (controller-mounted)
Local Display Panel (zone-mounted)
Handheld Interface Device (proprietary device)
PDA (3rd-Party HID)
Zone-Based port (details below)
Microprocessor(s) Hitachi H8/3048 @ 16Mhz
Clock Type
Powered, battery-backed
Battery powered
Powered, no battery backing
Other See Additional Information below
Clock Synchronization Information not provided
Volatile Memory (RAM) Capacity Information not provided
Volatile Memory (RAM) Uses
RAM use unrestricted
RAM use restricted as shown below
Information Not Provided
Program Execution / Calculation storage
Data / Trends / Alarms storage
Configuration / Parameter storage
Control Programming storage
Is Volatile Memory Supported By Battery? No
Battery Type(s) N/A
Battery Life N/A
Backup Battery Operating Time N/A
Non-Volatile Memory Capacity (EEPROM/Flash)* Information not provided
Non-Volatile Memory Uses
Data / Trends / Alarms / Calculation Storage
Configuration / Parameter Storage
Control Programming Storage
Controller Operating System
Additional Information Controller uses a "software clock" - no hard clock on-board.
* Items in NV memory are not lost upon power or battery failure. Other types of NV memory such as EPROM, NOVROM, etc. do not directly impact system performance.
Can trend data be stored in this controller? No
How many total trend values can be stored? No
What is the controllers role in trending? The controller can be polled for data by external trending device.
Can controller be programmed to 'push' data to archive or are trends 'pulled' from controller?
When full, does controller automatically send up trend data, overwrite data, or stop logging data? None
Programming Method(s) Pre-programmed sequences are configured using templates.
Resident vs Non-Resident Program Execution Pre-programmed routines are resident in controller.
Resident/Supervisory. This controller supervises the scheduling of other controllers.
Resident/Stand Alone. This controller contains its own schedule.
Non-Resident. This controller is dependent upon another controller for its schedule.
None. This controller has no scheduling features.
Resident Energy Management
Energy management algorithms for this controller can be custom programmed
Pre-programmed/built-in algorithms available, and are fully editable using custom programming
Pre-Programmed/built-in with limited editing via template-based programming
Controller is not typically used for energy management functions
Specific Pre-Programmed Algorithms Available
None (custom programming only)
None (not applicable)
Optimal Start/Optimal Stop
Peak Demand Limiting/Load Shedding
Economizer (enthalpy, dry-bulb, CO2, modulating/2-position, etc.)
Additional Energy Management functions are resident at SI
Additional Programming Functions Carrier's software-based Linkage system coordinates VAV box activity with AHU functions for a variety of demand-limiting and energy efficiency strategies.
DDC Loops (P, PI, PID) PID
Automatic PID Tuning Feature Not provided. Fast trends (1 sec) are available to facilitate manual tuning.
Automatical-Dial Alarm Support Available at the system level only through optional Autodial Gateway and Remote Communications device. Not available at the controller level.
Does controller perform multiple retries and buffer/store alarm until connection is made? N/A
Are multiple destinations possible? N/A
Upon controller power loss or hardware failure:
Are network communications affected? No
Is loss recognized on/by the network and alarm reported? Yes
DO and AO response?
Outputs fail to a user pre-specified position
Outputs fail to a normal (unpowered) position
Outputs fail to last position
Volatile memory functions?
Retained for life of backup battery
Upon restoration of power does the controller:
Auto-reboot without operator intervention? Yes. A power failure restart routine is provided which allows the controller to resume full operation without operator intervention if within the 72 hr. specified backup period.
Automatically reset/synchronize the clock? Information not provided
Update all monitored functions? Yes
Generate an alarm if backup battery is dead? Yes
Upon network or communications failure does controller:
Continue to operate standalone? Yes
Operate with last global settings or user-specified value? N.A.
Do broken network segments continue to communicate within the remaining segment?
(Note: May depend on proper termination of segments for higher speed networks.)
Information not provided
Does network automatically reconfigure upon restoration? Yes
Does network store 'loss of communications' alarm with time of event? Yes
Additional Information (optional)
Self Test Diagnostics
Does controller have internal self-test diagnostics to check:
Processor failure? N/A
Internal hardware failure? Yes
Open/shortened sensor? Yes
Others? Has on-board self-test diagnostics to automatically generate alarms due to malfunctions and exceeded system operating parameters. Controller also performs a range of common sensor diagnostics.
Control Enclosure UL94-5V plenum-rated plastic controller housing and actuator.
Power Supply Required
Voltage 24 Vac
VA 40 VA. Water reheat valves are limited to 15VA. Fan contactors limited to 10 VA each.
Surge Protection No
Underwriters Laboratories UL 916 PAZX (Energy Management)
UL 873
FCC Part 15, Sub-Part B, Class A
LonMark Certified
No - but LonWorks compatible
Information not provided
BACnet (BTL) Certified
Not submitted for testing
Information not provided