Carrier 33ZCVAVTRM Specifications download pdf (Page 106)

J. Stand-Alone Capability:

The controllers shall be capable of providing all con-

trol functions of the HVAC system without the use

of a computer. All configuration selections shall be

capable of being performed at a System Pilot dis-

play via push button access.

The controllers shall include the inherent capability

to access the system control selections as well as

to monitor system performance by means of a com-

municating network with a PC and EMS software

program.

K. DDC Control Networking:

The 3V™ system controllers shall be capable of

sharing the same communication network as

General Purpose Electronic Modules and option

modules.

The System Pilot shall be capable of broadcasting

time and date. The air source controller shall be

capable of broadcasting outside air temperature,

outside air enthalpy status, or outside air CO

con-

centration on the communications bus to other

Application Specific Controllers, and General Pur-

pose Electronic Controllers existing on the network.

The VVT® zone controllers shall also be able to

receive this information and more from the same

type of controllers on the network communications

bus.

The VVT zone controllers shall also be capable of

receiving commands from General Purpose Elec-

tronic Controllers (GPEC) existing on the communi-

cations bus. This information shall be used in a

variety of ways to control the HVAC system as well

as other building functions and applications.

L. VVT Zone Controller as a Linkage Coordinator:

1. The VVT zone controller shall be capable of

controlling space demand in a variable volume

application by monitoring space temperature

and determining the heating or cooling

demand. The space temperatures shall be con-

trolled to maintain individual heating and cool-

ing setpoints. The VVT zone controller shall

have the capability of scanning up to 32 linked

zones including itself and determining system

heating and cooling requirements. Individual

zones may be configured so that they do not

participate in system mode determination for

heating and cooling or just for the heating if

zone supplemental heat is installed.

The zone controller shall include adjustable sys-

tem mode lockouts for Cooling, Heating and a

configuration for intermittent fan when occu-

pied. These settings shall be accessible from a

System Pilot or from a PC with EMS software.

The system fan shall be capable of operating in

a continuous or automatic mode during occu-

pied hours and in an automatic mode during

unoccupied hours. The zone controller shall be

capable of operating the system in manual or

automatic changeover mode.

2. The zone controller shall include a heating/

cooling mode temperature changeover cycle to

eliminate zone thermal shock during periods of

system mode change.

3. The zone controller shall have a system com-

missioning mode whereby the installer may eas-

ily command all dampers to the maximum or all

dampers to the minimum positions or position

individual dampers. While this mode is active,

maximum and minimum damper settings may

be set. The system static pressure reading may

be viewed from the same screen while perform-

ing the operations above and the Bypass pres-

sure set point adjusted as required. The screen

data for this mode may be displayed from the

System Pilot or from a PC with EMS software.

4. The Zone Controller shall be capable of provid-

ing a communication check of all associated

controls and display device type as well as error

conditions.

M. VVT Zone Controller:

1. The VVT zone controller shall be capable of

independent zone control.

2. The zone controller shall operate all 3V

VVT zone dampers as well as VAV and fan

powered terminal boxes equipped with VVT

zone controllers.

3. The zone controller shall be capable of control-

ling supplemental heat or auxiliary heat

sources, including fan control, when required at

the zone level. Conversion to supplemental

heat shall not require replacement of the con-

trol system.

4. The zone controller shall operate in a pressure

dependent mode. Damper inlet area shall be

adjustable in increments of one square inch.

The zone controller shall be capable of reading

zone airflow in cfm and controlling zone airflow

based upon this information when operating in

pressure independent mode.

5. The zone controller shall have the capability to

support adjustable minimum and maximum

damper positions.

N. 3V Bypass Controller:

1. The 3V bypass controller shall be capable of

reading supply static pressure and controlling

the bypass damper to maintain the supply static

set point. This operation shall be provided

when operating within a 3V system application

or in a stand-alone mode.

2. The bypass controller shall include a pre-

positioning mode for opening the damper prior

to fan operation. The bypass controller shall

provide configurable minimum and maximum

damper position settings.

Guide specifications — 3V™ control system (cont)

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Carrier 33ZCVAVTRM Specifications Page 106

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