KMC Controls SimplyVAV BAC-8001 Manuale utente

Installation Guide

Cooling Only BAC-8001

BacNet DDC VAV Controller

BAC-8001 VAV Controller

Contents

Section 1

About the controllers

Specifications ........................................................................................................................5

Safety considerations .......................................................................................................... 7

Section 2

Installing the controllers

Setting the rotation limits ................................................................................................. 9

Mounting ............................................................................................................................ 10

Connecting inputs ............................................................................................................. 11

Connecting outputs ........................................................................................................... 12

Connecting to sensors ....................................................................................................... 12

Connecting to an MS/TP network .................................................................................. 13

Connecting an airflow sensor .......................................................................................... 16

Connecting power ............................................................................................................. 17

Application drawing ......................................................................................................... 18

Section 3

Setting up VAV controllers

Network communications ................................................................................................ 19

Setting temperature setpoints .......................................................................................... 20

Setting airflow setpoints ................................................................................................... 21

Setting the VAV terminal unit parameters .................................................................... 21

Balancing airflow ............................................................................................................... 21

SECTION 1

About the controllers

This section provides a description of the

BacNet DDC

BAC-8001 VAV controllers. It also introduces safety information.

Review this material before installing or operating the controllers.

The

BAC-8001

is native BACnet, direct digital controllers designed for VAV

terminal units. An integrated actuator and the supplied programs make these

ideal controllers for basic single-duct cooling and heating applications. Install

these versatile controllers in stand-alone environments or networked to other

BACnet devices. As part of a complete facilities management system, the

BAC-8001

controller providesprecise monitoring and control of connected

points.

BACnet MS/TP compliant

Standard VAV control sequences are incorporated to provide pressure

independent control of VAV unit

On-board airflow sensor for use with a single or multi-point differential

pressure measuring station or pitot tube.

Specifications

Analog inputs All inputs are configured as analog objects

Active inputs 1

Passive inputs 3

Air flow sensor 1

Key features Standard units of measure.

Overvoltage input protection

Connector Spade connectors, 0.25 inch

Conversion 12–bit analog–to–digital conversion

Input range 0–12 volts DC

Outputs, binary 2 for the internal actuator

Key features

Conversion 12–bit analog–to–digital conversion

Connector Spade connectors, 0.25 inch

Output range Maximum switching 24 VAC at 3 amperes

About the controllers

Specifications

Communications

BACnet MS/TP EIA–485 operating at rates up to 76.8 kilobaud.

Removable screw terminal block.

Wire size 12–24 AWG

Sensor jack RJ-45 jack compatible with model STE-8000 and

STE-6000 models with RJ-45 jacks

Supported objects See PIC statement for supported BACnet objects

Control Basic 5 program areas in BAC-8001

6 program areas in BAC-8201

PID loop objects 2

Value objects 60 analog, 32 binary, and 12 multistate

MemoryPrograms and program parameters are stored in

nonvolatile memory.

Auto restart on power failure

Application programs

Cooling and heating VAV

Balancing

UL 864 smoke controll (BAC-8201 only)

Air flow sensor features Configured as BACnet analog input object.

CMOS differential pressure 0-2 inches of water

(0-500 Pa) measurement range. Internally

linearized and temperature compensated.

Span accuracy 4.5% of reading.

Barbed connections for 1/4 FR tubing.

Range dependent upon DP pickup, tubing size/

length and connections.

Actuator specifications

Torque 40 in-lb. (4.5 N•m)

Angular rotation 0 to 95°

Adjustable end stops at 45° and 60° rotation

Motor timing, BAC-8001 90 sec./90° at 60 Hz

108 sec./90° at 50 Hz

Motor timing, BAC-8201 60sec./90° at 60 Hz

72 sec./90° at 50 Hz

Shaft size Directly mounts on 3/8 to 5/8 inch (9.5 to 16 mm)

round or 3/8 to 7/16 inch (9.5 to 11 mm) square

damper shafts.

Titus Alpha Controls supplies models BAC-8001

and BAC-8201 with programming sequences for

single-duct VAV applications.

BAC-8001 and BAC-8201 VAV Controllers About the controllers

Specifications

Regulatory UL 916 Energy Management Equipment

FCC Class B, Part 15, Subpart B

BACnet Testing Laboratory listed as an application

specific controller (ASC).

UL 864 smoke controls (BAC-8201 only)

Installation

Supply voltage 24 volts AC, -15%, +20% 5 VA

Weight 13.2 ounces (376 grams)

Case material Flame retardant plastic

Environmental limits

Operating32 to 120°F (0 to 49° C)

Shipping –40 to 140° F (–40 to 60° C)

Humidity 5–95% relative humidity (non-condensing)

Models

BAC-8001 VAV controller with 90 second actuator and reheat

BAC-8201 VAV controller with 60 second actuator, reheat,

and UL 864 smoke control application

About the controllers

Specifications

Dimensions

Table 1-1 BAC-8000 dimensions

ABCD EFG

6.53 in.4.89 in.4.25 in.0.77 in.6.00 in.2.14 in.1.92 in.

166 mm 124 mm 108 mm 19 mm 152 mm 54 mm 49 mm

About the controllers

Safety considerations

Safety

considerations

Danger

Danger represents the most severe hazard alert. Bodily harm or death will

occur if danger guidelines are not followed.

Warning

Warning represents hazards that could result in severe injury or death.

Caution

Caution indicates potential personal injury or equipment or property damage

if instructions are not followed.

Note

Notes provide additional information that is important.

Detail

Provides programing tips and shortcuts that may save time.

Titus assumes the responsibility for providing you a safe product and safety

guidelines during its use. Safety means protection to all individuals who

install, operate, and service the equipment as well as protection of the equipment

itself. To promote safety, we use hazard alert labeling in this manual. Follow

the associated guidelines to avoid hazards.

SECTION 2

Installing the controllers

This section provides important instructions and guidelines for

installing the BAC-8001 controller. Carefully review this

information before installing the controllers.

Installing a VAV controller includes the following topics that are covered in this

section.

Setting the rotation limits on page 12

Mountingon page 13

Connecting inputs on page 14

Connecting outputs on page 15

Connecting to an MS/TP network on page 16

Connecting an airflow sensor on page 19

Connecting power on page 20

In addition to the topics, see the section Application drawing on page 21.

Installing the controllers

Setting the rotation limits

Setting the

rotation limits Before mounting the controller, set the rotation limits with the supplied stop

screw. Installing the stop screw limits the shaft rotation to either 45 or 60 degrees.

Caution

Before setting the rotation limits on the controller, refer to the damper position

specifications in the VAV control box to which the controller will be attached.

Setting rotation limits that do not match the VAV damper may result in

improper operation or equipment damage.

To set the rotational limits:

1. Turn the controller over so you have access to the back.

2. Manually rotate the actuator fully clockwise as viewed from the back.

3. Remove the stop screw from its storage location and clean any debris from

the threads.

4. Insert the screw into the correct stop position hole.

5. Tighten the screw only until the head touches the plastic in the bottom of

the recess.

Illustration 2-1 Controller stop selections

Stop position

holes

Stop screw

in storage

Rotate CW

Position notch

as shown

BAC-8001 and BAC-8201 VAV Controllers Installing the controllers

Mounting

Mounting Mount the controller inside of a metal enclosure. To maintain RF emissions

specifications, use either shielded connecting cables or enclose all cables in

conduit.

Mount the controller directly over the damper shaft. A minimum shaft length of

2.0 inch (51 mm) is required.

Note

Mount the controller close enough to the pitot tubes to keep the tubing length to

a minimum. In typical installations the controller’s inputs and sensors are within

24 inches of each other.

Mount the controller as follows:

1. Loosen the nuts on the U-bolt until the shaft can fit through the collar.

2. Place the controller on the damper shaft in the approximate final position.

Position the controller loosely against the mounting surface so that the

mounting bushing can float freely in the mounting tab.

3. Center the mounting bushing in the slot of the mounting tab and secure it

using a #8 self-tapping screw.

4. Manually position the damper in the full open position.

5. Adjust the drive hub as follows:

a. If the damper rotates counter clockwise to close, depress the gear

disengagement button and rotate the drive hub to the full clockwise

position then release the button.

b. If the damper rotates clockwise to close, depress the gear disengagement

button and rotate the drive hub to the full counter clockwise position

then release the button.

6. Lock the hub to the shaft by evenly tightening the V-bolt nuts to 30 to 35

in-lbs.

Illustration 2-2 Controls and indicators

Mounting tab

Gear disengagement button

Airflow sensor inputs

Drive hub

and V-bolt

Status LEDs

Mounting bushing

The controller is designed to directly mount to 3/8 to 5/8 inch (9.5 to 16mm)

round or 3/8 to 7/16 (9.5 to 11mm) square damper shafts.

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