Bryant 580J*04--12 Manual de Instalação descarregar pdf (Página 19)

Number of Heat Stages – Indicates how many heat

stages are available for use. See configuration in

Appendix A for details on specific unit configuration.

Factory Default =1 for single heat stage units

2 for dual stage units

0 for cooling only units

Continuous Occupied Exhaust – This point tells the

controller when to run the power exhaust if equipped on

the unit.

If set to YES, the power exhaust will be on all the time

when in occupied mode and will be off when in

unoccupied mode. If set to NO the power exhaust will be

controlled by the Power Exhaust Setpoint.

Default = NO

RH Control -- Enables dehumidification control if an RH

sensor is available and the unit has the Perfect Humidity

dehumidification option installed.

Range =Disable/Enable

Default = Disable

(Enabled with Perfect Humidity option)

DCV Control -- Enables demand controlled ventilation

(DCV)ifvalidCO

sensor value is available and the unit

has an economizer installed.

Range = Disable/Enable

Default = Disable

System Space Temperature -- The network space

temperature value that the controller is using for control

(if applicable).

Range = N/A Default = --999.0_F

System Space RH -- The network relative humidity value

that the controller is using for control (if applicable)

Range = N/A Default = --999.0%

System Space AQ -- The network indoor air quality (CO

)

value that the controller is using for control (if applicable)

Range = N/A Default = --999.0 PPM

System Cool Demand Level -- The system cool demand

level being received over the network

Range = N/A Default = 0--3

System Heat Demand Level -- The system heat demand

level being received over the network

Range = N/A Default = --0--3

System Outdoor Air Temperature -- Allows the outdoor

air temperature value to be network readable when

enabled. Requires RTU Open to be equipped with an

outdoor air temperature sensor

Range = N/A Default = --999.0_F

System Outdoor AQ -- Allows network readable value of

OAQ for calculation during differential OAQ CO

levels

and IAQ CO

levels to drive the IAQ control

Range = N/A Default = --999.0 PPM

System Fire / Smoke -- Allows network readable fire/smoke

signal to invoke shutdown action in the RTU

Range = N/A Default = OFF

Indoor CO

Sensor Value @ Min mA – Sets the indoor

value when the board reads 4 mA at input 1 or 2.

Range = 0 to 9999 ppm Default = 0 ppm

Indoor CO

Sensor Value @ Max mA – Sets the indoor

value when the board reads 20 mA at input 1 or 2.

Range = 0 to 9999 ppm Default = 2000 ppm

Outdoor CO

Sensor Value @ Min mA – Sets the outdoor

value when the board reads 4 mA at input 1 or 2.

Range = 0 to 9999 ppm Default = 0 ppm

Outdoor CO

Sensor Value @ Max mA – Sets the outdoor

value when the board reads 20 mA at input 1 or 2.

Range = 0 to 9999 ppm Default = 2000 ppm

NOTE: The indoor and outdoor min and max mA setting

are used to set the linear curve of mA vs. PPM.

OPERATION

The RTU Open will control the compressors, economizer

and heating outputs based on its space temperature input

and setpoints. It can also be controlled by a building

control system or zoning system. An optional CO

IAQ

sensor mounted in the space can influence the economizer

minimum position. The RTU Open has a hardware clock

that can allow scheduling for stand-alone operation. The

RTU Open’s default is to control to occupied setpoints all

the time, until a type of occupancy control is set. The

following sections describe the operation for the functions

of the RTU Open.

Occupancy

Occupancy is the fundamental overall control of

equipment. The unit can be in one of two states: Occupied

or Unoccupied. These are usually referred to as periods

because they represent periods of any given day. Before

RTU Open can operate specific functions of the

equipment it is installed on, occupancy must be

determined. There are four different ways RTU Open can

determine occupancy. These are described below and

selected by the configuration point Occupancy Source.

Always Occupied (Default)

The unit will not determine occupancy and continuously

run in the occupied state or period. RTU Open ships from

the factory with this setting to allow immediate operation.

BACnet

Schedule

When Occupancy Source is set to BACnet Schedule, RTU

Open will use a schedule to change occupancy based upon

a day of week and a time period. Local time and date

should be set in the RTU Open for this function to operate

properly. This function applies if setting a local schedule

in the RTU Open or if applying the unit to a Building

Automation System or an Open zoning system. An Open

network schedule can override a local schedule within the

unit. A space sensor push button override is only available

when running a local or Open schedule. The push button

will override an unoccupied period to occupied for the

specified time duration.

BAS On/Off

When Occupancy Source is set to BAS On/Off, RTU

Open follows occupancy based on an On/Off command to

the BAS ON/OFF software point. An on command sets

the occupancy to occupied, and an off command sets it to

unoccupied. The Building Automation System can be

speaking BACnet, Modbus, N2, or LON and is writing to

the BAS On/Off point in the open protocol point map.

Remote Occ Input

When Occupancy Source is set to Remote Occ Input, RTU

Open follows occupancy based on the remote occupancy

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