3v tmcontrol system vvt® bypass controller 33zc · the 3v control system vvt bypass controller...

3V TMControl SystemVVT® Bypass Controller

33ZC

Installation, Start-Up andConfiguration Instructions

Part Number 33ZCBC-01

CONTENTSPage

SAFETY CONSIDERATIONS ............................ 1GENERAL ............................................. 1INSTALLATION ..................................... 1-11General ................................................ 1Bypass Controller Hardware ........................... 2Field-Supplied Hardware ............................... 2• DUCT TEMPERATURE (DAT) SENSORMount Bypass Controller .............................. 2• LOCATION• MOUNTINGConnect the Power Transformer ........................ 2Bypass Controller Inputs and Outputs ................. 5Install Duct Temperature Sensor ....................... 5Install Pressure Tubing ................................ 5Install Field-Supplied Actuators ........................ 6• FLOATING POINT HIGH-TORQUE ACTUATORS• LINKED ACTUATORSDam per Stops ....................................... 6Connect the Carrier Network Communication Bus ..... 6• COMMUNICATION BUS WIRE SPECIFICATIONS• CONNECTION TO THE COMMUNICATION BUSSTART-UP ............................................. 12Perform System Checkout ............................ 12CONFIGURATION .................................. 12-17Status Display Table .................................. 12Maintenance Tables ................................... 13• BYPASS CONTROLLER MAINTENANCE TABLE• BYPASS CONTROLLER COMMISSIONING

MAINTENANCE TABLE• BYPASS CONTROLLER SYSTEM PILOT DEFAULT

MAINTENANCE TABLEConfiguration Tables ................................. 15• ALARM CONFIGURATION TABLE• BYPASS CONTROLLER CONFIGURATION TABLE• SYSTEM PRESSURE SET POINT CONFIGURATION

TABLE• DUCT SENSOR CONFIGURATION TABLE• DEVICE CONFIGURATION TABLE• LANGUAGE CONFIGURATION TABLEOPERATION ..................................... 18-20System Pressure Operation ........................ 18Bypass Controller Calibration ...................... 18

SAFETY CONSIDERATIONS

SAFETY NOTEAir-conditioning equipment will provide safe and reli-

able service when operated within design specifications.The equipment should be operated and serviced only byauthorized pel.sonnel who have a thorough knowledgeof system operation, safety devices and emergencyprocedures.

Good judgement should be used in applying any manu-facturer's instructions to avoid injury to personnel or dam-age to equipment and property.

Disconnect all power to the unit before performing mainte-nance or service. Unit may automatically start if power isnot disconnected. Electrical shock and personal injurycould result.

GENERAL

The 3V control system VVT bypass controller (33ZCBC-01)is a system static pressure controller that operates to maintain thedesired system duct pressure based on the system pressure setpoint. The VVT bypass controller is used with a system of VVTzone controllel.s. Zone controllel.s maintain plecise telnperatmecontrol in rite space by regulating the flow of conditioned air intorite space and operating an optional tenninal fan.

As part of rite 3V control system, the bypass controller isdesigned to communicate using a Carrier protocol with aLinkage Coordinator zone controllec One Linkage Coordina-tor zone controller can coordinate up to 31 additionCd zonecontrollers. The purpose of the Linkage Coordinator/zonerelationship is to provide an efficient &tta path for communica-tion between the zone controllers, bypass controllel: andassociated C_urier network air source. This turangement makesup the 3V control system.

A user interface is not required for everyday operation ofthe bypass controller. A service person or building owner c:mconfigure or operate the bypass controller through a Careernetwork user interface such as the System Pilot or Careersoftware.

INSTALLATION

General- The bypass controller is used to control thebypass &tmper actuator in the 3V control system. The purposeof the bypass dalnper is to account for fluctuations in the sup-ply air plessure caused by the zone dmnpers modulating to sat-isfy individual set points. The bypass system allows a constantvolume HVAC (heating, ventilation and air conditioning) unitto supply variable volumes of air to the building. The systembypasses air from the supply side to the return side of the unit.

Determining the proper size for the bypass damper is criti-cal for the operation of rite VVT (variable volume/variabletemperature) system. If the dmnper selected is too large, it mayhave to modulate mole than necessary to react to system pres-sure changes. The ability of the system to stay within a pressmer;mge is compromised. When the damper is undersized, thecapability of the damper to control the pressure may be com-promised due to the inability to bypass enough air volume. Anundersized damper also creates higher airflow velocities whichadd to the noise generated by the system.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book 1 14 PC 111 Catalog No. 533-30012 Printed in U.S,A, Form 33ZC-14SI Pg 1 10-04 Replaces: Newm

Tab 11a 13a

This book will discuss installation and wiring of the bypasscontroller and bypass actuatol: The bypass damper and ductsystem should aheady be correctly sized and installed. Tile by-pass actuator should be sized to match the bypass dampel:Carrier provides system software that can be used to design thesystem and choose the conect &_mpers and actuators based onthe application.

Bypass Controller Hardware -- The bypass control-let consists of the following hardware:• control module

• plastic enclosure with integrated actuator• one no. 8 x 3/4-in. self-drilling sheet metal screw

Figure 1 shows the bypass controller physical details.

Field-Supplied Hardware--Each bypass controllerrequires the following field-supplied components to completeits installation:

• damper• damper actuator (if high-torque actuator is required)• transformer-- 24 vac, 40 va (standard applications)• duct temperature sensor (33ZCSENI)AT) with grommet

(to secure I)AT sensor to duct)

DUCT TEMPERATURE SENSOR (I)AT) -- The bypasscontroller must be connected to a field-supplied duct tempera-ture sensor (part number 33ZCSENI)AT) to monitor the tem-peratme of file air delivered by file air source.

Mount Bypass Controller

LOCATION -- The bypass controller should be located on ornear the bypass damper in a ceiling area where accessible.When an extermfl high-torque actuator is used, the bypasscontroller is mounted on the shaft of the dalnpel: Select alocation which will be safe from water &_mage and _dlowsufficient access for service and wiring. For service access,there should be at least 6 in. of clearance between the front of

the bypass controller and adjacent surfaces. Refer to Fig. 1-3.

MOUNTING- Perform the following steps to mount thebypass controller:

1. Visually inspect the damper and determine the direc-tion in which the damper shaft moves to open thedamper -- clockwise (CW) or counterclockwise(CCW).

If the damper rotates CCW to open, it does not requireany configuration changes.

If the damper rotates CW to open, then the damperactuator logic must be reversed. This is done in thesoftware when performing system start-up and dampercalibration test. Do not attempt to change damper rota-tion by changing wiring. This will upset the damperposition feedback potentiometer readings.

2. Rotate the damper shall to the fully closed position.3. Press the release button on the actuator and rotate the

clamp in the same direction that was required to closethe damper in Step 2.

4. Press the actuator release button and rotate the actuator

back one-position of graduation. Release the buttonand lock the actuator in this position.

5. Mount the bypass controller to the terminal by slidingthe damper shall through the actuator clamp assembly.See Fig. 2 for details. Remove the controller wiring

access cover. Secure the controller by installing thescrew provided through the grommet in the anti-rotation slot. Detach the grommet from the slot so itcan slide from side to side. Be sure the floating grom-met is in the center of the slot. FAILURE TOCENTER THE GROMMET MAY CAUSE THEACTUATOR TO STICK OR BIND.

6.

7.

Tighten the actuator clamp assembly to the dampershaft. Secure by tightening the two 8-mm nuts.

If the damper has less than 90 degrees of travelbetween the fully open and fully closed positions, thena mechanical stop must be set on the actuator. Themechanical stop prevents the damper from openingpast the maximum damper position. To set themechanical stop, perform the following procedure:

a. Press the actuator release button and rotate thedamper to the fully open position.

b. Using a No. 1 Phillips screwdriver, loosen theappropriate stop clamp screw and move the stopclamp so that it contacts the edge of the cam onthe actuator

c. Secure the stop clamp in this position by tighten-ing the screw.

8. Verify that the damper opens and closes. Press theactuator release button and rotate the damper. Verifythat the damper does not rotate past the fully openposition. Release the button and lock the damper in thefully open position.

9. Replace wiring access covet

Connect the Power Transformer -- An individual,field-supplied, 24-vac power transformer is required for eachbypass controllel: Transformers must be UL (Underwriters'Laboratories) Class 2 rated. Stan&trd applications require a24 vac transformer, rated at 40 va minimum. All transformersecon&tries are required to be grounded. Use only strandedcopper conductors for all wiring to file bypass controllel:Wiring connections must be made in accordance with NEC(Nafiomd Electrical Code) and local codes. Ground one side ofthe mmsformer secon&try at the transformer location. Connectthe grounded side of the transformer to Jl-2. Connect the liveside of the transformer secon&Lry to J1-1. Connect an 18-gage,green ground wire from terminal Jl-3 to the metal chassis ofthe unit.

The power supply is 24 vac _+10% at 40 va (50/60 Hz).

For bypass controllers, file power requirement sizing allowsfor the bypass actuatol: The bypass &tmper actuator is limitedto 20 va.

NOTE: Do not run sensor or communication wiring in thesame conduit with line-voltage wiring.

Perform the following steps to connect the powertransformer:

1. Install file field-supplied transformer in an electric_denclosme that conforms to NEC and local codes.

2. Connect 24 vac from the transformer as shown in the

applicable wiring diagram (Fig. 4). Be sure to observepolarity when connecting file transformer powel: Thegrounded terminal must be connected to file transformerground terminal as shown.

DAMPER

SHAFT \

MECHANICAL

STOP

ACTUATORCLAMP

ASSEMBLY

O®

®35 in-lb (4 Nm)

24 VAC/DC50/60 Hz3VA 2W

iGND Not Usec

CE Nol Used GND+ DAT

O _ 10V Not UsecDMPPOS NDGND G

Not Used Not Usec

VVT ® GND Not Usec

BYPASS Controller _ _

Part Number: 33ZCBC-01 °1_ (D I _ .

Bus#: ,.................., i_J5_ _

Element#:_ i o _ o ! _"

u_# " = 333= _X +.', OO_ o "6 '6 ', 8liooozzz '

WIRING

ACCESS

(i-iiiii" -- ANT_-ROTATIONSLOTAND

GROMMET

(HIDDEN)

ACTUATOR

RELEASEBUTTON

HIGH PRESSURE

TUBING (BYPASSCONTROLLER ONLY)

Fig. 1 -- Bypass Controller Details

OVl/T ®

BYPASS Controller

Part Number: 33ZCBC-01

'N:I IB.s#: iSg_ .......Element#: __ I o _

I_ 1', OO_ "6 _ _ ', 8IOOOZZZ I

Not Used +24V

GND Not Usec

Not Used GND,_ DAT+10V

Not Usec

DMPPOS GNDGND

Not Used Not Usec

GND Not Usec

9,2 _

(234 mm)

Fig. 2- Bypass Controller Dimensions

,/_6" (60 mm)

4.84" (123 mm)

TOBUILDING

z3_7

UHIGH PRESSURE

TUBING

SUPPLYAIR

!

DUCTTEMPERATURE

SENSOR

BYPASS I_DAMPER

J LOW PRESSURE_

OPEN TO SPACE

BYPASS |DAMPER E

W/ACTUATOR[

POWERSUPPLY

TO COMMUNICATIONBUS

Fig. 3 -- Bypass Controller Installation

TO

FEEDBACK

POTENTIOMETER

i

i i i

I,I_J ,, _ ÷24V

US z _, _,f. _ ..... i GND

o i t_l >'1Lt.. ' _ GND -i

L_ ._._ +10V_*..... DMPPOS

GND......... GND

GND

Mroller

P..Numbo_:[ ] 8_S/N: [

j _o _

Bus#: ............................Element#: J5

Unit#: := __ i}_; _ iI _ ____0 +.,_-- ' ! OOO co

--+TO W._TE.....

DAMPER {-R'E_.......ACTUATOR -

DAT

TORED

_L_c_ } COMMUNICATIONBUS

TRANS

..... ItI_LIN E VOLTAGE

/_--TTRANSFORMER GROUND

EQUIPMENT GROUND

Fig. 4 -- Bypass Controller Wiring

Bypass Controller Inputs and Outputs -- The by-pass controller inputs and outputs are shown in Tables 1and 2.

Table 1 -- Bypass Controller Inputs

CHANNEL J4 TERMINATIONS DESCRIPTION CONTROLDEVICE

DUCT TMP 10, 12 Duct Temperature 10K Thermistor

DMP POS 9 (10 v). 7 (W+). 5 (-) Damper Position 0-10 VDC

SP SENSR 3. 1 System Pressure 0-5 VDC

Table 2 -- Bypass Controller Outputs

CHANNEL J5 TERMINATIONS DESCRIPTION CONTROLDEVICE

DMPR CCW 1 (24 VAC), 2 Damper CCW 24 VAC

DMPR CW 3 (24 VAC), 2 Damper CW 24 VAC

Install Duct Temperature Sensor -- Tile duct tem-perature sensor is required. The duct temperature sensor mustbe installed in the supply air duct. The 33ZCSENDAT is therecommended sensol: See Fig. 5 for sensor details.

For bypass systems, the duct temperature sensor should bemoved to a location which will provide the best sensing of thesupply-air temperature dining heating and cooling.

For bypass systems using a ducted supply, the duct tempera-ture sensor should be located in the main supply ductdownstream of file discharge of the air source and before thebypass &tmper to allow good mixing of the supply airstream.

Tile 33ZCSENDAT duct sensor is a small epoxy sensor thatis l l/4-in, long. A grommet is provided for filling the holearound the sensor cable after the sensor is located in the duct.

See Fig. 3 and 6 for mounting location.

Disconnect electrical power before wiring the bypass con-trollel: Electrical shock, personal injury, or dmnage to thefan coil controller can result.

Do not mn sensor or relay wires in the same conduit or race-way with Class 1 AC service wiring. Do not abrade, cut, ornick the outer jacket of the cable. Do not pull or draw cablewifll a force that may hm'm the physical or electrical properties.Avoid splices in any control wiring.

Perform the following steps to connect file duct temperaturesensor to the bypass controller:

1. Drill or punch a l/4-in, hole in the supply duct. SeeFig. 6. Duct sensor can be installed to hang from top ofduct or from the sides. Sensor probe can touch side ofduct.

2. Push sensor through hole in the supply duct. Snap thegrommet into the hole until it is secure. Pull on tile leadsof the duct sensor until the sensor is snug against thegrommet.

3. Connect the sensor leads to the bypass controller's termi-nal board at the terminals labeled DAT (J4-10) and GND04-12). See Fig. 4 for wiring. If extending cable lengthbeyond 8 ft, use plenum rated, 20 AWG (American WireGage), twisted pair wire. Sensor wiring does not havepolarity. Either lead can be wired to eifller terminal.

4. Neatly bundle and secure excess wire.

5. Using electrical tape, insulate any exposed lead to preventshorting.

6. Connect shield to earth ground (if shielded wire is used).

Install Pressure Tubing -- Tilestatic pressure pick upshould be located in the main supply duct before the firstbranching of ductwork. Run the tubing from the bypass con-troller to the installation location. For stable aidlow measure-

ment, file recommended minimum length of tubing is 2 ft.Connect the tubing to the high side of the pressure sensormarked PI. Make sure the low side of the pressure sensor (P2)is open to the atmosphere. See Fig. 3.

DRILL 1/4" HOLE

IN TOP OF DUCTAND LET SENSOR

HANG DOWN

ALTERNATE INSTALLATION

LOCATK)N INSIDE OF DUCT

LY DUCT

Fig. 6 -- DAT Installation Location

.225/.245

(5.72/6.22)

o0.06_

/15/ =!

NOTE: Dimensions are in inches.Dimensions in ( ) are in mm.

1.00

(25.4)

1.25

(31.8):!

Fig. 5 -- 33ZCSENDAT Duct Sensor

I

75.0 + .5 ]I(1905)

Install Field-Supplied Actuators --Follow the damp-er manufacturels lecommended installation instructions with

the following recommendations.

Belimo Multi-Function technology actuators may be ordereddirect fiom Belimo. The following accessory actuatols may beused instead of the integrated actuator:

• NM24-MFT US P-30002 -- 70 in.-lb actuators withfloating point control and 0 to 10 vdc feedback.

• AM24-MFT US P-30002 -- 160 in.-lb actuators with

floating point control and 0 to 10 vdc feedback.

The following actuatols may be used as linked actuatols.Up to four actuators may be linked to the main actuator:• LM24-MFT US P-10002 -- 35 in.-lb actuators with 0 to

10 vdc control and 0 to 10 vdc feedback.• NM24-MFT US P-10002 -- 70 in.-lb actuators with 0 to

10 vdc control and 0 to 10 vdc feedback.• AM24-MFT US P-10002 -- 160 in.-lb actuators with 0

to 10 vdc control and 0 to 10 vdc feedback.

FLOATING POINT HIGH-TORQUE ACTUATORS --The field-supplied floating point high-torque actuators ;uemulti-function technology actuators intended for applicationswhere higher torque is needed for bypass operation. Theseactuatols would replace the integrated actuator on the bypasscontrollel: The actuators have three wires for power andcontrol and one 0-10VDC feedback wire to send a signal to thebypass controller and any linked actuators. The three controlwires are I(BLK), 2(RED), and 3(WHT). The I(BLK) and2 (RED) wires provide power to the actuatol: These should bewired to the same power source as the bypass controllermaking sure wire 2 (RED) connects to J l-I on the power plugof the Bypass controller and wire 1 (BLK) connects to J5-2 thecommon of the Bypass Controller powel: See Fig. 7 and 8 forwiring.

Pokuity of the actuator and bypass controller power must bethe same for proper operation and to prevent damage to thedevices. A 1N4004 or 1N4007 diode must be placed across theCCW and CW terminals of the bypass controllel: The end ofthe diode with the silver band tip (positive end) should beplaced in the CCW termimd _dong with Wire 3(WHT). Theother end of the diode should be placed in the CW terminalwith the actuator switch in the CW or default position. Thiswill make the &_mper rotate CCW when the CCW terminal isenergized and CW when the CW terminal is energized. Forreverse rotation the actuator switch may be changed to theCCW position.

LINKED ACTUATORS -- Field-supplied linked actuatorsmay be used to link to the bypass controller actuatol: Inst_fll theactuators per the manufacturer's directions. Provide power forthe linked actuators by wiring 24 vac to the I(BLK) and 2(RED) wires. Maintain pokuity if more than one actuator ispowered by the same power supply. Make sure the directionrotation switches on the linked actuatol_ me set to CW. Wirethe wile 3 (WHT) of the linked actuator(s) to the wire 5 (GRN)of the controlling actuatol: The linked actuator will then trackto the same &_mper position as the controlling actuator. SeeFig. 8-10 for wiring.

Linked actuatol_ may be used to control off the integratedactuator of the bypass controller actuatol: Install the actuatorsper the manufactmer's directions. Provide power for the linkedactuators by wiring 24 vac to the 1 (BLK) and 2 (RED) wires.Maintain polarity if more than one actuator is powered by thesame power supply. Make sure the direction rotation switcheson the linked actuatol.s are set to CW. Connect wile 3 (WHT)of the linked actuator to J4-7(DMPPOS).

Damper Stops -- For clockwise closed installations thedamper stop on the right side of the dmnper shaft is left at thefull clockwise position. The stop on the left side of the shaftmust be moved to stop the actuator at the full open position forthe &_mpel: For example the Carrier round &_mpers rotate45 degrees. Slide the left stop up to the 45 degree mark. Plessthe actuator lelease button and rotate the &tmper CCW all theway to the stop. The &Lmper blade indicator should indicatethe &Lmper is lull open. Wire 5 (white) should be wired toJ4-7(DMPPOS). See Fig. 2.

NOTE: The rotation switch should be in the CW position forconect feedback for this application. Reverse the rotation byconfiguring the bypass controller for clockwise open and donot change the switch from the CW position.

Connect the Carrier Network Communica-tion Bus -- The bypass controllers connect to the bus in adaisy chain arrangement. The bypass controller may be in-stalled on a prim;uy bus or on a secondary bus from the prima-ry bus. Connecting to a secon&wy bus is recommended.

At any baud (9600, 19200, 38400 baud), the number of con-trollers is limited to 239 zones maximum. Bus length may notexceed 4000 ft, with no more than 60 total devices on any1000-1l section. Optically isolated RS-485 repeaters are re-quired every 1000 ft.

NOTE: Set rotationswitches to CW.

©Field-Supplied

High-Torque ActuatorFloating Point

0 - 10 VDC Feedback

cwoDiode 1N4004 shipped

with AM24-MFT-USactuator

1

3©

©

sO©

24 VAC40 VA

J1 O(

_m m

13) wht

(1) blk

3V TM Bypass Controller

__/

(5)wht

/i 5 719 15

Ioo o _ ooooi J4Iooooooool

2 !6

Fig. 7 -- High-Torque Actuator Wiring


©Field-Supplied

High-Torque ActuatorFloating Point

0 - 10 VDC Feedback

im

Diode 1N4004 shippedwithAM24-MFT-US

actuator

r-/__75-]

©

20 II! blk30

O

50

O

(2) red

1 5

I000(

[OOO2

m

--i(5_(3)wht _ -- _ 3VTM Bypass Controller

9 15

_) 0000 I

0 0 oooJ J416

Field-Supplied

24 VAC

40 VA

24 VAC

© ©

0-10 VDC Control

0- 10 VDC Feedback

c_®Y +com U

I[ ' J (5)gin

(2) red /t

Y

(1) blk ,'_

II II0-10 VDC Feedback

C C

Y +com U Y

I I II

(5) gm

not used •

(3) wht _ //

/,(2) red

(1) blk /_

(3) wht Z

(2) red

(1) blk ,,_

I+com U I

I

II

(5) grn

not used

(3) wht ,4_

_. (2) red

(1) blk ,'_

0 - VDC Control

0 - VDC Feedback

0 - VDC Control

0 - VDC Feedback

Y +com U

I II

(5) gm

not used

Fig. 8 -- High-Torque Actuator with Linked Dampers Wiring

Oi!! ¸ 5̧ 2o

_ii I

30_i iii

i_i_i_!_i_i_<ii__i_30()

24 VAC

40 VA


>-To Existing Inte£ ratedActuator

, 5_71I [oo000

2

S 3VTM Bypass Controller

IIIII

, I91 ,5 I(9000

J4 i0 0 000

16 ]

Field-Supplied

t//__ Linked Actuator

0 - 10 VDC Control0 - 10 VDC Feedback

Y

II

(2) red

(I)blk

+ corn U

I

I I (5) gmNot Used

Fig. 9 i Field-Supplied Linked Damper Wiring


r

O20

3 0

O

sO

__ __ S 3VTM i ypass Controller

:_Existing IntegratedActuator

0/i

i

1 51 491 15

I_1 Ioo6,?,€oool ..,4_' I ooo[ooooo JField-Supplied

24 VAC

40 VA

24 VA(

O O

0 - 10 VDC Control

0 - t0 VDC Feedback

Y + com U

I

(5) grn

#,,4

__1/

(2) red

(1) blk

olovDccont oIIw0 - t0 VDC Feedback

cwQ oY +com U Y

I II

(5) gm

(3) wht _ • not used

/_l (3) wht /_ _ 7

(2) red (2) red

(1) blk ,4# (1) blk

0-VDC Control

0-VDCFeedback

+ corn U

II

(5) gmnot used

13/wht_,_t(2) red

(1) blk ,4

I W(_- VDC Control I

0 - VDC Feedback

C

Y + corn U

I II

(5) grnnot used

Fig. 10- Multiple Field-Supplied Linked Damper Wiring

10

The first device in a network connects directly to the bridgeand file others ale wired sequentially in a &tisy chain fashion.Refer to Fig. 11 for an illustration of communication buswiring.

COMMUNICATION BUS WIRE SPECIFICATIONS --The communication bus wiring is field-supplied and field-installed. It consists of shielded three-conductor cable with

drain (ground) wire. Tile cable selected must be identical to theCtuTier Network communication bus wire used for the entirenetwork. See Table 3 for recommended cable.

Table 3 -- Recommended Cables

MANUFACTURER CABLE PART NO.

Alpha 2413 or 5463American A22503

Belden 8772Columbia 02525

NOTE: Conductors and drain wire must be at least 20 AWG(American Wire Gage), stranded, and tinned copper. Individual con-ductors must be insulated with PVC, PVC/nylon, vinyl, Teflon, orpolyethylene. An aluminum/polyester 100% foil shield and an outerjacket of PVC, PVC/nylon, chrome vinyl, or Teflon with a minimumoperating temperature range of -20 C to 60 C is required.

CONNECTION TO THE COMMUNICATION BUS

1. Strip the ends of the red, white, and black conductors ofthe communication bus cable.

2. Connect one end of the communication bus cable to

the bridge communication port labeled COMM2 (ifconnecting on a secondary bus).

When connecting the communication bus cable, a colorcode system for the entire network is recommended tosimplify installation and checkout. See Table 4 for therecommended color code.

Table 4 -- Color Code Recommendations

SIGNAL TYPE COMMUNICATION PLUG PINBUS WIRE COLOR NUMBER+ Red 1Ground White 2

Black 3

3. Connect the other end of the communication bus cableto the terminal block labeled CCN in the bypasscontrollel: Following the color code in Table 4,connect the Red (+) wire to Terminal 1. Connect theWhite (ground) wire to Terminal 2. Connect the Black(-) wire to Terminal 3.

4. Connect additional devices in a daisy chain fashion,following the color coded wiring scheme in Table 4.Refer to Fig. 11.

NOTE: The communication bus drain wires (shield) mustbe tied together at each device. If the communication bus isentirely within one building, the resulting continuous shieldmust be connected to ground at only one single point. If thecommunication bus cable exits from one building and entersanother building, connect the shields to ground at a light-ning suppressor in each building where the cable enters orexits (one point only).

BYPASSCONTROLLER

DRAIN WIRE (TYP)

BLK (TYP)

WHT (TYP)

RED (TYP) _J

/-

ZONECONTROLLER

1000 FT. MAXIMUM

!SYSTEMPILOT

"/

,):,. ,IIL: I UCOMM2II

ZONE BRIDGECONTROLLER (RECOMMENDED)

Fig. 11 -- Communication Bus Wiring

11

START-UP CONFIGURATION

Use the Cmrier network communication softwme to stm-t upand configure the bypass coil controller

All set-up and set point configurations me factory-set andfield-adjustable.

Changes can be made using the System Pilot or Careersoftwme. During start-up, the System Pilot or Career sollwamcan also be used to verify communication with the bypasscontrollel:

For specifc operating instructions, refer to the literatureprovided with the System Pilot or Cmrier software.

Perform System Checkout -- To check out file sys-tem, perfoml the following:

1. Apply 24 vac power to the bypass controller.

2. Using the System Pilot, upload the controller fromaddmss 0,141 (default address). The addmss may be set atthis time. The address should be set to 1 higher than themonitor or the linkage coordinator.

3. Access the bypass controller commissioning and mainte-nance tables.

4. If the temrinal &tmper closes in the clockwise dimction,then no adjustment is required. If the terminal damperopens in the clockwise dimction, set the CW Rotationpoint to OPEN.

5. Force the Bypass Commis point to Enable.6. Force the Damper Calibration point to Enable. The auto-

matic bypass damper calibration process will begin. Thebypass controller will verify that the air source fan is off.Communication with the linkage coordinator is requimd.Make sure the linkage coordinator and the BypassController am addmssed correctly.

NOTE: If the Bypass Controller is in local mode (standalone), the user must make sum the duct static pmssum is0 to enable damper calibmfon.

If the fan is turned on, the Damper Caliblution plv)cesswill be aborted. The bypass damper will travel to its min-imum and maximum positions. The &tmper positionswill be saved and used by the bypass controllel: When thedmnper calibration process is complete, the bypass con-nv)ller will automatically return the point to Disable.

7. Force the Zelv) Pmssum Sensor Cal point to Enable. Thebypass controller verify that the air source fan is off. If thefan is turned on, the Zero Pmssum Sensor Calibrationplv)cess will be aborted. The bypass controller will auto-matic_dly calibrate the zero value of the pressure sensol:When the calibration process is complete, the bypass con-troller will automatically return the point to Disable.

8. Set up all zone controllers and perform system commis-sioning at the linkage coordinator befom adjusting theSystem Pmssum Set Point.

9. Adjust the System Pmssum Set Point by forcing the pointto the desimd v_due. The bypass controller will write theforced value to the set point table and will begin to con-trol to the new bypass pmssum set point.

10. Read the airflow with a measuring device, ff the readingvguies fi_)m the screen v_due, force the value to the mea-sured wdue. Once the pmssum sensor is forced, the control-ler will automatically calibrate the pressure sensor (as longas the bypass &tmper is not >95% open). Repeat as needed.

The following sections describe the computer configuration

screens which am used to configum the bypass controller. The

screens shown may be displayed differently when using differ-ent Carrier softwme.

Status Display Table -- The status display table is usedto show status of different functions of the bypass controllel:The v_dues displayed in this table am mad-only values. SeeTable 5.

SYSTEM MODE -- The System Mode vmiable displays theLinkage Coordinator zone controller's system mode as the by-pass controller's system mode except when the bypass control-ler is in its commissioning mode or the network communica-tion fails. In bypass commissioning mode, the system modewill display BPCOMMIS to indicate the bypass controller is inits own commissioning mode. If the network communicationbetween the bypass controller and the linkage coordinator fails,the system mode will display LOCAL.

System Mode: Display Units ASCIIDisplay Range HEATING COOLING.

FREE COOL,PRESSURE, EVAC,ZONE_BAL, OFEBPCOMMIS, LOCAL

Network Access Read only

DAMPER POSITION- This variable displays the &tmperposition pement range of rotation determined by the damperfeedback potentiometer The bypass controller is designed foruse on dampers with a range of rotation up to 90 degrees.

DamperPosition: Display Units % open

Display Range 0 to 100Network Access Read only

SYSTEM PRESSURE SETPT -- This variable displays thesupply air static pressure set point that is to be maintained bythe bypass controllel: The bypass controller determines thedamper position by comparing the system static pressure to thisset point.

System PressureSetpoint: Display Units in. wg

Display Range 0.10 to 1.80Network Access Read only

SYSTEM PRESSURE--This variable displays the staticsystem pressure through an integrated pressure sensor in incre-ments of 0.1 in. wg.

System Pressure: Display Units in. wgDisplay Range 0.00 to 2.00Network Access Read only

DUCT TEMPERATURE- This vmiable displays the ducttemperature at the bypass damper through a 10K thermistorwith a measurement range fi'om _4-0 to 245 F in 0.1 ° Fincmments.

Duct

Temperature: Display Units F (C)Display Range _40.0 to 245.0Network Access Read/Write

Table 5 -- Status Display

DESCRIPTION VALUE UNITS STATUS FORCE NAME

System Mode BPCOMMIS Comm failure SYS MODE

Damper Position 0 %OPEN Comm failure DMP POS

System Pressure Setpt 1.50 in H20 Comm failure SP SETPT

System Pressure 0.00 in H20 Comm failure SP SENSR

Duct Temperature 73.8 dF Comm failure DUCT TMP

12

Maintenance Tables -- The bypass controller containsthe following maintenance tables, Bypass Controller Mainte-nance Table (BP MAINT), Bypass Controller CommissioningMaintenance %ble (BPCOMMIS), and Bypass Controller Sys-tem Pilot Default Maintenance (SP MAINT).

BYPASS CONTROLLER MAINTENANCE TABLE --See Table 6 for Bypass Controller Maintenance Table(BP MAINT).

System Mode -- This wuiable displays the master zone con-troller's system mode as the bypass controller's system modeexcept when the bypass controller is in its commissioningmode or the network communication fails. In bypass commis-sioning mode, tile system mode will display BPCOMMIS toindicate the bypass controller is in its own commissioningmode. If the network communication between the bypasscontroller and tile master zone controller fails, the system modewill display LO(TAL

System Mode: Display UnitsDisplay Range

ASCIIHEATING, COOLING.FREE COOL,PRESSURE,EVAC, ZONE_BAL,OFF. BPCOMMIS,LOCAL

Forcible No

Damper Position -- This variable displays the damper posi-tion percent range of rotation determined by the &tmper feed-back potentiometel: The bypass controller is designed for useon &tmpers with a range of rotation up to 90 degrees.


Display Range 0 to 100Forcible No

System Pressure Setpt --This vguiable displays the supply airstatic pressure set point that is to be maintained by the bypasscontrollel: The bypass controller determines the &tmper posi-tion by comparing the system static pressure to this set point.


Display Range 0.10 to 1.80Forcible No

LAT Exceeds Limit -- This variable displays whether theleaving air temperature exceeds tile heating or cooling limitconfigured in the Bypass Controller Service ConfigurationTable. If l_,s is displayed, tile System Pressure Set Point isincreased by the value in LAT Pressure Delta. This will causetile amount of bypassed air to be reduced, thus protecting theair source from receiving air tilat is too hot or too cool. If No isdisplayed, then no LAT protection is in effect.

LAT ExceedsLimit: Default Value No

Display Range Yes/NoForcible No

LAT Pressure Delta -- This variable displays the amount ofin. wg by which the System Pressure Set Point will be in-creased if LAT Exceeds Limit displays Yes.

LAT PressureDelta: Display Units in. wg

Display Range 0.00 to 1.00Forcible No

System Pressure -- This variable displays the static systempressure through an integrated pressure sensor in increments of0.1 in. wg.

System Pressure: Display Units in. wgDisplay Range 0.00 to 2.00Forcible No

Duct Temperature -- This variable displays the duct tempera-ture at the bypass damper through a 10K therlnistor with ameasurement range from -40 to 245 F in 0.1 ° F increments.

DuctTemperature: Display Units F ((2_)

Display Range -40.0 to 245.0Forcible Yes

Clear Alarms -- This variable displays the commanded stateof the Clear Alarms function. If this decision is forced to Yes,_til algums in the Alarm Histo U Table will be cletued and thisdecision will automatic_tily be set back to No.ClearAlarms: Default Value No

Display Range Yes/NoForcible Yes

Table 6 -- Maintenance


System Mode BPCOMMIS SYS MODE

Damper Position 58 %OPEN DMP POS

System Pressure Setpt 1.50 in H20 SP SETPT

LAT Exceeds Limit No LAT ALRM

LAT Pressure Delta 0.00 in H20 DELTA SP

System Pressure 0.00 in H20 SP SENSR

Duct Temperature 73.8 dF DUCTTMP

Clear Alarms No CLR ALRM

13

BYPASS CONTROLLER COMMISSIONING MAINTE-

NANCE TABLE -- See Table 7 for Bypass Controller Com-missioning Maintenance Table (BPCOMMIS).

Bypass Commis (60 min) -- This variable displays whetherthe bypass commissioning function has been enabled. The by-pass commissioning function permits the user to calibrate thebypass damper and the system pressure sensol: All calibrationdecisions will remain disabled until the user forces BypassCommissioning to Erlable. When the user forces this decisionto Ellable, System Mode will be updated to BPCOMMIS to in-dicate that bypass commissioning is in effect.

Bypass controller commissioning will automatically be dis-abled if no activity is detected in the commissioning mainte-nance table (for example, if none of file calibration decisionsare forced or if communication with the zone controller is lost)for one horn:

BypassCommiss: Default Value Disable

Display Range Enable/DisableForcible Yes

Damper Calibration -- This variable displays whether thedamper c_dibration process has been enabled. When the userforces fills decision to Erlable after Bypass Commissioning hasalso been forced to Erlable, the bypass damper is calibrated.

If the system fan is on, the bypass controller sends a requestto the Linkage Coordinator zone controller to turn the systemfan off. If the communication fails, the damper calibration pro-cess will be terminated and this decision will be Disabled.

When the fan is off. the zone controller will drive the damp-er to the lull closed position.

After completing the closed position calibration, the zonecontroller will drive the damper to the full open position.

If there was ginerror during the closed or open position cali-bration, an '_arm will be generated and Damper Cal Alarm willdisplay Alam_ until a successlul damper calibration t_tkes place.

When calibration is completed, the force will be removedfrom Dtunper Calibration decision, and the bypass controllerwill send a request to the Linkage Coordinator zone controllerto return the system fan to normal operation. The damper willremain fully open.

NOTE: Bypass controller commissioning will automaticallybe disabled if no activity is detected in this maintenance tablefor one hourDamperCalibration: Default Value Disable


Zero Pressure Cal -- This valiable displays whether the pres-sure transducer zero calibration process has been enabled.When the user forces this decision to Erlable after BypassCommissioning has also been set to Erlable, the pressure trans-ducer is calibrated.

If the system fan is on, the zone controller will send a re-quest to the Linkage Coordinator zone controller to turn the

system fan off. If the communication fails, the dampercalibration process will be terminated and this decision will beDL_abled.

When the fan is off. the zone controller will drive the damp-er to the full open position.

The bypass controller will measure the output voltage of thepressure sensor and verify that the output voltage is within thetolerance of zero pressure voltage of the sensor (1.0 _+0.1 vdc).

If the pressure sensor voltage failed to decrease to within thezero pressure tolerance (1.0 _+0.1 vdc), a Press Sensr CalAkum will be displayed until a successlul c_dibration t_tkesplace.

When calibration is completed, the force is removed t]omZero Pressure Cal decision, and the bypass controller will senda request to the Linkage Coordinator zone controller to returnthe system fan to normal operation. The damper will remainfully open.

NOTE: This value cannot be forced if Auto Press C_tl is set toErlable in the Sensor Service Configuration Table.

NOTE: Bypass Controller Commissioning will automaticallybe disabled if no activity is detected in this maintenance tablefor one hom:Zero PressureC_d: Default Value Disable


Pressure Sensor Cal -- This variable displays whether thehigh-end pressure transducer calibration process has beenenabled. The purpose of this process is to correctly calibrate thepressure transducer. When the user forces this decision toErlable after Bypass Commissioning has also been set toErlable, the user may then force the System Pressure to theconect reading as measured with calibrated test equipment.From the forced value, the bypass controller calculates a cali-bration multiplier that will always be applied to file SystemPressure sensor reading. Once the multiplier is c_dculated, theforce is removed and the multiplier is applied to the SystemPressme sensor reading.

NOTE: Bypass controller commissioning will automatic_fllybe disabled if no activity is detected in this mtdntenance tablefor one horn:PressureSensor Cal: Default Value Disable


Damper Position -- This vtuiable displays the &tmper posi-tion percent range of rotation determined by the cktmper feed-back potentiometel: The bypass controller is designed for useon cktmpers with a range of rotation up to 90 deglees.


Default Value 0

Display Range 0 to 100Forcible No

Table 7 -- Commissioning Maintenance


Bypass Commis (60 min) Enable Servico COMMISS

Damper Calibration Disable DMP CAL

Zero Pressure Cal Disable ZR PSCAL

Pressure Sensor Cal Disable PS CAL



System Pressure Setpt 1.50 in H20 SP SETPT

Damper Cal Alarm Normal DAMP CAL

Press Sensr Cal Alarm Normal SP CAL

14

System Pressure -- This variable displays the static systempressure through an integrated pressure sensor in increments of0.1 in. wg. When Bypass Commissioning and Pressure SensorCal are Enabled, the user may force this value to the conectreading of the System Pressure as measured with calibrated testequipment. From the fomed value, the bypass controller calcu-lates a calibration multiplier that will _dways be applied to theSystem Pressme sensor reading. Once file multiplier is calcu-lated, the force is removed and the multiplier is applied to theSystem Pressme sensor reading.

System Pressure: Display Units in. wgDefault Value 0.00Display Range 0.00 to 2.00Forcible Yes

System Pressure Setpt --This vtuiable displays the supply airstatic pressure set point that is to be mainttfined by the bypasscontrollel: The bypass controller determines the &tmper posi-tion by comparing the system static pressure to this set point.When the user forces the System Pressure Setpt from this table,the bypass controller automatically updates the SystemPressure Setpt configuration value in the Pressure Setpoint Ser-vice Configuration Table.


Default Value 0.50Display Range 0.10 to 1.80Forcible Yes

Damper Cal Alarm -- This wuiable displays Alarm if thedamper calibration process failed bec_mse there was an errorduring the closed or open position calibration of the damper.Normal is displayed when a successful damper calibrationtakes place.

DamperCal Ahu'm: Default Value Norm_d

Disphty Range Normal/AlarmForcible No

Press Sensr Cal Alarm -- This variable displays Alam_ if thepressure transducer zero c_dibration process failed because thepressure sensor voltage did not decrease to within the zeropressure tolerance (1.0 _+0.1 vdc). Normal will be displayedwhen a successlul pressure transducer zero c_dibration takesplace.

Press SensrC_d Ahum: Default Value Norlnal

Display Range Normal/AhumForcible No

BYPASS CONTROLLER SYSTEM PILOT DEFAULTMAINTENANCE TABLE- See Table 8 for Bypass Con-troller System Pilot Default Maintenance (SP_MAINT).

Duct Temperature -- This variable displays the duct tempera-ture at the bypass damper through a 10K thermistor with ameasurement range from -40 to 245 F in 0.1° F increments.

DuctTemperature: Disphty Units F (C)

Default Value M-0.0Disphty Range _40.0 to 245.0Forcible Yes

Damper Position -- This variable displays the damper posi-tion percent range of rotation determined by the damper feed-back potentiometel: The bypass controller is designed for useon dmnpers with a range of rotation up to 90 degrees.


Default Value 0Display Range 0 to 100Forcible No

System Pressure -- This variable displays the static systempressure through an integrated pressme sensor in increments of0.1 in. wg.

System Pressure: Display Units in. wgDefault Value 0.00Display Range 0.00 to 2.00Forcible No

System Mode -- This wuiable displays the master zone con-troller's system mode as the bypass controller's system modeexcept when the bypass controller is in its commissioningmode or the network communication fails. In bypass commis-sioning mode, the system mode will display BPCOMMIS to in-dicate the bypass controller is in its own commissioning mode.If the netwoN communication between the bypass controllerand the Linkage Coordinator zone controller fails, the systemmode will display LOCAL.

System Mode: Display UnitsDisplay Range

Fol_ible

ASCIIHEATING, COOLING.FREE COOL,PRESSURE, EVAC,ZONE_BAL, OFF.BPCOMMIS, LOCALNo

Configuration Tables--The bypass controller con-tains the following configuration tables: Alarm Configuration(ALMCONF), Bypass Controller Configuration (BP_SERV),Device Configuration (BYPASS), Language Configuration(LNGCONF), Duct Sensor Configuration (SEN_SERV), andSet Point Configuration (SETPOINT).ALARM CONFIGURATION TABLE-- The Alarm Con-

figuration Table (ALMCONF) contains decisions used to con-figure the _darm settings for the zone controller This includesrealarm time and routing of _dtums. See Table 9.

Table 8 -- System Pilot Default Maintenance


Bypass Controller

Duct Temperature 73.8 dF DUCTTMP



System Mode BPCOMMIS SYS MODE

Table 9 -- Alarm Configuration

DESCRIPTION l VALUE l UNITS Jr NAMEAlarm Routing Control 11010000 | ROUTING

Re-alarm Time 10 min |RETIME

15

Alarm Routing Control -- This decision indicates whichCarrier system software or devices will receive and processalarms sent by the zone controllel: This decision consists ofeight digits each can be set to zero or one. A setting of 1 indi-cates aimms should be sent to this device. A setting of zerodisables alarm processing for that device. Currently thecorresponding digits ale configured for the following devices:fil.st digit - user interface software; second digit - autodialgateway or Telink; fourth digit - alarm printer interfacemodule/DataLINK/BAClink/Carrier Translator; digits 3, and 5through 8 - unused.

Alarm RoutingControl: Range 00000000 to 11111111

Default Value 00000000

Re-Alarm Time -- This decision is used to configure the num-ber of minutes the zone controller will wait before an alarmcondition which has not been corrected will be re-transmittedon the communications network. Re-akuming of an altu'm con-dition will continue until the condition no longer exists.

Alarm Re-AkumTime: Units Minutes

Range 0 to 1440Default Value 0 (Disabled)

BYPASS CONTROLLER CONFIGURATION (BP_SERV)TABLE -- The bypass controller configuration table containsdecisions used to configure the damper modulation and theLAT (leaving air temperature) protection decisions. The bypasscontroller can also be configured as a broadcast acknowledgel:See Table 10.

Damper Control Deadband -- This decision is used to config-ure a deadband for bypass &_mper position control. This algo-rithln operates based on the pressure sensor input to achieve thedesired set point. In the algorithln, an error sigmfl is defined asthe difference between the system pressure set point and thepressure sensor input. The deadband is multiplied by a fixedvalue of 0.05 to adjust the reaction of the &_mper algorithm.The size of the deadband will correspond to the gain of theloop. The smaller the deadband, the higher the gain and thefaster the loop will react. The larger the deadband, the lowerthe gain and the slower the loop will react.

NOTE: If the Damper Control Deadband v_due is set too low.excessive actuator movement and wear may occuE

Damper ControlDeadband: Range 2 to 10

Default Value 5

CW Rotation -- This decision is used to configure the rotationof the bypass damper ff the decision is set to close, the bypasscontroller modulates the damper counterclockwise to the openposition. If the decision is set to open, the bypass controllermodulates the &_mper clockwise to the open position.

CW Rotation: Range Open/CloseDefault Value Close

Max Damper Alarm Limit -- This decision is used to gener-ate aimms during system heating and cooling modes. When the

bypass &_mperposition is greater than this configured limit andthe duct temperature meets required conditions, an alarm willbe generated.

During the heating mode if the duct temperature is greaterthan the Heating LAT Limit plus 10° F for more than 2 minutesthen a Ix)w Heating Airflow Pressure Alarm will be generated.

During the cooling mode if the duct temperature islower than the Cooling LAT Limit minus 2° F for more than2 minutes then a Low Cooling Airflow Pressure Almm will begenerated.

The &_mperposition configured in this decision is also usedwhen the associated master zone controller has not determinedits system mode and the system fan is deenergized.Max DamperAkum Limit: Range 20 to 99%

Default Value 99%

LAT Pressure Delta -- This decision is used to configure theamount by which the System Pressure Setpt will be increased ifthe duct temperature goes above the Heat LAT Limit or belowthe Cool LAT Limit. This will cause the amount of bypassedair to be reduced, protecting the air source from leceiving airthat is too hot or too cool.

LAT PressureDelta: Display Units in. wg

Default Value 0.0Display Range 0.0 to 1.0

Heat LAT Limit -- This decision is used to configure the heat-ing limit used to provide LAT protection to control the systemairflow based on the duct temperature. If the duct temperaturegoes above this limit, the System Pressure Setpt will be in-creased by the amount configured in LAT Pressure Delta.Heat LATLimit: Display Units F

Default Value 120.0Display Range 80.0 to 120.0

Cool LAT Limit -- This decision is used to configure thecooling limit used to provide LAT protection to control the sys-tem airflow based on the duct temperature, ff the duct tempera-ture goes below this limit, the System Pressure Setpt will be in-creased by the amount configured in LAT Pressure Delta.Cool LATLimit: Display Units F

DeEmlt Value 50.0Display Range 35.0 to 70.0

Broadcast Acknowledger -- This decision is used if thebypass controller will be used to acknowledge broadcastmessages on the Carrier ProprietaU Network bus. One broad-cast acknowledger is required per bus, including secon&trybusses created by the use of a bridge.BroadcastAcknowledger: Range No/Yes

Default Value No

Table 10 -- Bypass Controller Configuration

DESCRIPTION VALUE UNITS NAME

Damper Modulation

Damp Control Deadband 5 DEADBAND

CW Rotation Close DMP DIR

Max Damper Alarm Limit 99 %OPEN DMP LMT

LAT Protection

LAT Pressure Delta 0.0 in H20 DELTA SP

Heat LAT Limit 120.0 dF LAT HLIM

Cool LAT Limit 50.0 dF LAT LLIM

Broadcast Acknowledger No BCST ACK

16

SYSTEM PRESSURE SET POINT CONFIGURATION(SETPOINT) TABLE -- See Table 11 for System PressureSet Point Configuration table.

Table 11 -- System Pressure Set Point Configuration

DESCRIPTION VALUE UNITS ] NAMESystem Pressure Setpt 0.40 in H20 ] SP SET

System Pressure Setpt -- This variable is used to configurethe supply air static pressure set point that is to be maintainedby file bypass controllel: The bypass controller determines thedamper position by comparing the system static pressure to thisset point.

Do not use tiffs set point to raise the static pressure if allzone damper minimum set points ale configured to 0%.Personal injury and damage to ductwoN and equipmentmay occuc


Default Value 0.50

Display Range 0.10 to 1.80

DUCT SENSOR CONFIGURATION (SEN_SERV)TABLE--See Table 12 for Duct Sensor Configuration(SEN_SERV) table.

Auto Pres Cal -- This decision is used to enable the automatic

pressure zero c_dibration option. This calibration is performedwhen the system fan transitions to off and remains off for5 minutes or when this decision is set to Erlable and the c_dibra-

tion has not been performed for at least 168 running hours(7 &tys).

If the decision is set to Enable, the bypass controller willsend a request to the associNed master zone controller to turnthe fan off. At the end of the calibration the bypass controllerwill signal the master zone controller to return the system fan tonorm_d operation.

If this decision is set to Disable, file bypass controller willstill be able to calibrate the pressure sensor manually from theBypass Controller Commissioning Maintenance NiNe.Auto PressureCal: Default Value Disable

Display Range Enable/Disable

Bypass Err Damp Pos -- This decision is used to configurethe position to which the bypass controller will hold its &tmperduring an error condition associated with the pressure sensol:During the pressure sensor enor condition, the bypass control-ler will hold the &tmper position and generate a pressure sensorfailure alarm.

NOTE: If this value is set too low, damage to the system duct-work could occur with a pressure sensor failure.Bypass EnDamp Pos: Range 0 to 100%

Default Value 100%

Press Sensr Cal Alarm -- Use this decision to enable an alarmif the pressure sensor input voltage fails to decrease to withinthe zero tolerance (1.0 _+0.1 vde) of the sensor. The akum isdisabled if this decision is set to Disable.

Press SensrCal Alarm: Default Value Enable

Display Range Enable/Disable

Duct Temp Cal Offset -- This decision is used to calibrate theduct temperature sensor by adjusting the offset value to the de-sired temperature trim value. For example, if the temperaturedisplayed is two degrees above the wAue measured with c_di-brated test equipment, input a value of-2.0.

Duct TempCal Offset: Display Units F

Default Value 0.0Display Range -9.9 to 9.9

DEVICE CONFIGURATION (BYPASS) TABLE -- The De-vice Configuration table contains reference information aboutthe bypass controllec The user can input a short description andthe location of the device. The Software Part Number, ModelNumbeL Seri_d NumbeL and Reference Number are alsoshown. See Table 13.

LANGUAGE CONFIGURATION (LNGCONF) TABLE --Use this decision to select the display kmguage that will be seenon all user interfaces for this controller By default, the bypasscontroller displays information in English. To change to a sec-ond language display, set this decision to No, download thistable and then upload the bypass controller to see the factoU-loaded second language. [f a second language is not availablein this module, tiffs decision will be disregarded and informa-tion will continue to be displayed in English. See Table 14.

EnglishLanguage: Range No/Yes

Default Value Yes

Table 12- Duct Pressure Configuration


Auto Press Cal Disable AT PSCAL

Bypass Err Damp Pos 100 %OPEN ERR DPOS

Press Sensor Cal Alarm Enable PCAL ALM

Duct Temp Cal Offset 0.0 dF TEMP CAL

Table 13- Device Configuration


Description: Bypass Controller DevDesc

Location: BUILDING 1 Location

Software Part Number: CESR131340-01 PartNum

Model Number: ModelNum

Serial Number: 0107000001 SerialNo

Reference Number: Version 1.0 RefNum

Table 14 -- Language Configuration

DESCRIPTION t VALUE + UNITS t NAMEEnglish Language Yes ENGLISH

17

OPERATION

System Pressure Operation

NORMAL OPERATION -- Tile bypass controller will mod-ulate its &tmper to maintain the proper system static pressureset point. The bypass controller does this by comptuing itspressme sensor input reading to the configured system staticplessure set point and determining the error (sensor reading --set point). The bypass controller then compares the calculatederror to the configured deadband value. If the error is greaterthan 1/4 of the deadband v;due (configured deadband times aconstant of 0.05), then the bypass controller commands thedamper to open or close (depending on the positive or negativev_flue of the error). If the error is less than 1/4 of the deadbandv;flue, the bypass controller holds the damper position. If thepressure sensor fails, the bypass controller will move thedamper to the configured Pressure Sensor Error DamperPosition. See Fig. 12 for an operation flow ch_ut.

LEAVING AIR TEMPERATURE (LAT) MODE -- The by-pass controller will provide LAT protection by controlling thesystem pressure based on its duct temperature. If the ducttemperature goes above the configured heating LAT limit orbelow the cooling LAT limit, the bypass controller willincrease the pressure set point by the configured LAT PressureDelta value. This will cause the alnount of bypassed air goingback to the air source to be reduced. If the LAT Pressure Delta

decision is configured for zero, the LAT protection functionwill be disabled. The bypass controller will control to thenormal system pressure set point again at the end of the currentheating or cooling cycle, or when its duct temperature sensorreads greater than the Cooling LAT limit plus five degrees orless than the Heating LAT limit minus ten degrees. Thistemperature swing would indicate that the air source cycled theheating or cooling as part of its LAT protection, or because thesystem conditions _ue close to satisfying the mode.

NOTE: Bypass LAT protection is disabled during BypassCommissioning mode, or if the duct temperature sensor fails.

Bypass Controller Calibration -- The bypass con-troller allows calibration of the &mlper and pressure sensorfrom the Bypass Commissioning Maintenance screen. Refer tothe System Check-Out section for the step-by-step procedure.

DAMPER CALIBRATION -- If the bypass controller is notoperating in stand-alone mode, it will veril_ the system fanstatus with its associated Linkage Controllel: If the fan is on,the bypass will request its Linkage Controller to turn the fanoff.

NOTE: If the bypass controller is in stand-alone mode (notcommunicating with a Linkage Coordinator) the user mustensure the pressure reading is zero before performingc_dibration. The bypass controller will not be allowed to entercalibration mode if the fan is on.

In either case, the bypass will check to ensure the fan is offby reading its plessure sensor and damper position. If thepressure reading is less than 10% of the static plessure set pointand the bypass dmnper position is less than 25% of theresistance of the feedback potentiometer for greater than60 seconds, then the bypass controller assumes the fan is off.When the fan is off. the bypass controller will drive its damperto the fully closed position. The bypass controller will read thevalue of the actuator's feedback potentiometer until the valuestops changing. This indicates the dmnper is fully closed. If

the feedback resistance value meets the Damper Closed

Criteria in Table 15, the bypass controller will store the v_flue innon-volatile memoly as the resistance at fully closed. The

bypass controller will then position the damper fully open.

When the feedback resistance value stops changing, the bypasscontroller roads the value and if the feedback resistance value

meets the Damper Open Criteria in Table 15, the bypass

controller stores the value as the resistance at fully open. The

bypass controller will use the following formula to determine

damper position:

For dmnper rotation configured as Open:

Damper Position (% open) = ((Feedback Resistance -

Resistance at Full Closed)/((Resistance at Full Open) -

(Resistance at Full Closed))) * 100.

For dmnper rotation configured as Closed:

Damper Position (% open) = 100 - ((Feedback Resistance -

Resistance at Full Closed)/((Resistance at Full Open) -

(Resistance at Full Closed))) * 100.

Table 15 -- Damper Position Criteria

DAMPER CLOCKWISE COUNTERROTATION CLOCKWISEThe resistance value is The resistance value is

Damper greater than 75% of less than 25% ofOpen Criteria the full range the full range

of the potentiometer of the potentiometerThe resistance value is The resistance value is

Damper less than 25% of greater than 75% ofClosed Criteria the full range the full range

of the potentiometer of the potentiometer

If an invalid resistance value is lead, the bypass controllerwill not store or use the value, and will issue a DamperC_dibration Alarm. If the bypass controller loses communica-tion with its associated Linkage Coordinatok the dampercalibration process will be terminated. When the &tmpercalibration is completed, the bypass controller will signal theLinkage Coordinator to leturn the fan to normal operation.

PRESSURE TRANSDUCER ZERO CALIBRATION --Pressure transducer calibration will occur under two conditions

if it is not operating in stand-alone mode. The first condition iswhen it is forced by the user in the BPCOMMIS maintenancetable to perform this operation. The second condition is whenthe system goes in to the unoccupied mode for at least 5 minutesor 168 hours (7 &tys) since the last c_dibmtion, whichevercomes fil_t, ff the bypass controller is not operating instand-_flone mode, it will veri_ the system fan status with itsassociated Linkage Coordinatol: If the fan is on, the bypasscontroller will send a high priority request to its LinkageCoordinator to turn the fan off. If the fan is aheady off. thebypass controller will send the same priority request to ensmethat the fan stays off during the calibration procedme. If forsome reason the bypass controller loses communication with itsLinkage Coordinator for more the 60 minutes or the procedmetakes longer the 60 minutes, the Linkage Coordinator will returnthe fan and system to normal operation and the bypass controllerwill terminate the calibration procedme and return to normaloperation.

NOTE: If the bypass is in stand-alone mode (not communicat-ing with a Linkage Controller), the user must ensure thepressme reading is zero before performing calibration.

18

Ineithercase,thebypasscontrollerwillchecktoensurethefanisoffbyreadingitspressuresensoranddamperposition.Ifthepressurereadingislessthan10%ofthestaticpressuresetpointandthebypassdamperpositionislessthan25%oftheresistanceof thefeedbackpotentiometerfor greaterthan60seconds,thenthebypasscontrollerassumesthefanisoff.Whenthefanisoff.filebypasscontrollerwillchiveitsdampertothefullyopenposition.If aninvalidfeedbackresistancevalueis detected,thebypasscontrollerwill tenninatethecaliNation.Onceatthelullyopendamperposition,thebypasscontrollerwillreadtheoutputvoltageofthepressuresensol:If

filevoltagereadswithinthe range of 1.0 vdc _+0.1 volt, itcalculates the offset voltage based on the difference betweenfile output voltage reading and the nominal zero pressmereading of 1.0 vdc. This value is then stored in non-volatilememoly. If the voltage reading is outside of the tolerancerange, the bypass controller will display "Alarm" in thecommissioning screen. The screen will display "Alarm" until asuccessful calibration of the pressure sensor is performed.When the calibration is completed, the bypass controller willsignal the Linkage Coordinator to return the fan to normaloperation.

19

LEGEND

BP -- BypassBP SETPT -- System Pressure SetpointDAT -- Duct Air TemperatureDMP POS -- Damper PositionLAT -- Leaving Air TemperatureLAT ALARM -- Leaving Air Temperature AlarmLAT HYST -- Leaving AirTemperature Setpoint HysteresisLC -- Linkage CoordinatorPS error -- Static Pressure Sensor errorSP SENSR -- Static Pressure SensorSP SET -- Static Pressure Setpoint

DMP POS=0% ]_ YES

Enter

with a LC ?

or Pressurization?

System mode = LOCAL _,- Be SETPT = SP SET

_[ DMP POS =100% auto calibratehigh/low limit?

YES

]Ask LC to |

/turn off fan

_[ Calibration failed- N_

turn OAiCrabration

Return LC tonormal control

DMP POS =ql 100%

DMP POS = Bypss Err Damp Pos

NO

and DAT valid?

YES

SetLAT ALRM = Yes

BP SETPT = SP SET

PS error=SP SENSR-BP SETPT

Set LAT ALRM = No ]

BP SETP=

LAT HYST+SP SET

error Close Damper>(

NO

Hold Damper absolute value > Open Damper ]

Fig. 12 -- Bypass Controller Operation Flow ChartCopyright 2004 Carrier Corporation

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book 1 14 PC 111 Catalog No. 533-30012 Printed in U.S.A. Form 33ZC-14SI Pg 20 10-04 Replaces: Newl

Tab 11a 13a

3v tmcontrol system vvt® bypass controller 33zc · the 3v control system vvt bypass controller...

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