TSI Instruments SUREFLOW 8682, SUREFLOW 8682-BAC Operation And Service Manual

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ENERGY AND COMFORT

Critical Environments

Monitors/Controllers

Models 8682

8682-BAC

SUREFLOW™

Adaptive Offset Controller

Operation and Service Manual

P/N 1980483, Revision D

January 2008

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Models 8682

8682-BAC

SUREFLOW™

Adaptive Offset Controller

Operation and Service Manual

P/N 1980483, Revision D

January 2008

U.S. AND CANADA OTHER COUNTRIES

Sales & Customer Service: (800) 874-2811/(651) 490-2811 (001 651) 490-2811

Fax:

Fax: (651) 490-3824 (001 651) 490-3824

SHIP/MAIL TO: E-MAIL

TSI Incorporated answers@tsi.com ATTN: Customer Service 500 Cardigan Road WEB SITE Shoreview, MN 55126 www.tsi.com USA

Sales & Customer Service:

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Part number 1980483

LIMITATION OF WARRANTY AND LIABILITY

Seller warrants the goods sold hereunder, under normal use and service as described in the operator's manual, shall be free from defects in workmanship and material for twenty-four (24) months, or the length of time specified in the operator's manual, from the date of shipment to the customer. This warranty period is inclusive of any statutory warranty. This limited warranty is subject to the following exclusions:

a. Hot-wire or hot-film sensors used with research anemometers, and certain other components when indicated in

specifications, are warranted for 90 days from the date of shipment.

b. Parts repaired or replaced as a result of repair services are warranted to be free from defects in workmanship

and material, under normal use, for 90 days from the date of shipment.

c. Seller does not provide any warranty on finished goods manufactured by others or on any fuses, batteries or

other consumable materials. Only the original manufacturer's warranty applies.

d. Unless specifically authorized in a separate writing by Seller, Seller makes no warranty with respect to, and

shall have no liability in connection with, goods which are incorporated into other products or equipment, or which are modified by any person other than Seller.

The foregoing is IN LIEU OF all other warranties and is subject to the LIMITATIONS stated herein. NO OTHER

EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR PARTICULAR PURPOSE OR MERCHANTABILITY IS MADE.

TO THE EXTENT PERMITTED BY LAW, THE EXCLUSIVE REMEDY OF THE USER OR BUYER, AND THE LIMIT OF SELLER'S LIABILITY FOR ANY AND ALL LOSSES, INJURIES, OR DAMAGES CONCERNING THE GOODS (INCLUDING CLAIMS BASED ON CONTRACT, NEGLIGENCE, TORT, STRICT LIABILITY OR OTHERWISE) SHALL BE THE RETURN OF GOODS TO SELLER AND THE REFUND OF THE PURCHASE PRICE, OR, AT THE OPTION OF SELLER, THE REPAIR OR REPLACEMENT OF THE GOODS. IN NO EVENT SHALL SELLER BE LIABLE FOR ANY SPECIAL, CONSEQUENTIAL OR INCIDENTAL DAMAGES. SELLER SHALL NOT BE RESPONSIBLE FOR INSTALLATION, DISMANTLING OR REINSTALLATION COSTS OR CHARGES. No Action, regardless of form, may be brought against Seller more than 12 months after a cause of action has accrued. The goods returned under warranty to Seller's factory shall be at Buyer's risk of loss, and will be returned, if at all, at Seller's risk of loss.

Buyer and all users are deemed to have accepted this LIMITATION OF WARRANTY AND LIABILITY, which contains the complete and exclusive limited warranty of Seller. This LIMITATION OF WARRANTY AND LIABILITY may not be amended, modified or its terms waived, except by writing signed by an Officer of Seller.

SERVICE POLICY

Knowing that inoperative or defective instruments are as detrimental to TSI as they are to our customers, our service policy is designed to give prompt attention to any problems. If any malfunction is discovered, please contact your nearest sales office or representative, or call TSI's Customer Service department at (800) 874-2811 or (651) 490-2811.

TRADEMARKS

UREFLOW™ is a trademark of TSI Incorporated.

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CONTENTS

HOW TO USE THIS MANUAL ..........................................................................................

PART ONE.......................................................................................................................... 1

User Basics ............................................................................................... 1

The Instrument.......................................................................................... 1

Operator Panel.......................................................................................... 3

Alarms ....................................................................................................... 5

Before Calling TSI.....................................................................................6

PART TWO ......................................................................................................................... 7

Technical Section...................................................................................... 7

Software Programming ............................................................................. 7

Menu and Menu Items ............................................................................ 11

Setup / Checkout .................................................................................... 51

Calibration............................................................................................... 58

Maintenance and Repair Parts ............................................................... 62

Troubleshooting Section ......................................................................... 64

APPENDIX A .................................................................................................................... 73

Specifications.......................................................................................... 73

APPENDIX B .................................................................................................................... 75

Network Communications ....................................................................... 75

Modbus Communications .......................................................................75

N2 Communications Description of Variables .......................................79

LonWorks Node Object........................................................................... 81

LonWorks Object ....................................................................................83

8682 BACnet MS/TP Protocol Implementation Conformance

Statement..............................................................................................

Model 8682-BAC BACnet MS/TP Object Set ......................................... 86

APPENDIX C .................................................................................................................... 89

Wiring Information...................................................................................89

APPENDIX D .................................................................................................................... 93

Access Codes ......................................................................................... 93

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How to Use This Manual

UREFLOW™ Operation and Service Manual is divided into two parts. Part One describes

The S how the S read by users, facilities staff, and anyone who requires a basic understanding of how the

UREFLOW controller operates.

Part Two describes the technical aspects of the product which includes operation, calibration, configuration, and maintenance. Part Two should be read by personnel programming or maintaining the unit. TSI recommends thoroughly reading this manual before changing any software items.

NOTE: This operation and service manual assumes proper S

UREFLOW unit functions and how to interface with the device. This section should be

UREFLOW controller installation.

Refer to the Installation Instructions to determine if the S

UREFLOW controller has been

properly installed.

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PART ONE

User Basics

Part One provides a brief but thorough overview of the S minimal reading. These few pages explain the purpose (The Instrument), and the operation (Useful User Information, Digital Interface Module, Alarms) of the unit. Technical product information is available in Part Two of the manual. The manual focuses on laboratory spaces; however, the information is accurate for any room pressure application.

UREFLOW™ product by maximizing information with

The Instrument

UREFLOW Adaptive Offset Controller (AOC) maintains laboratory pressure and air balance. The AOC

The S measures and controls all air flow into and out of the laboratory and measures the pressure differential. Proper laboratory pressure differential provides safety by controlling airborne contaminants that can adversely affect workers in the laboratory, people in the laboratory vicinity, and experiments. For example, laboratories with fume hoods have negative room pressure (air flowing into the room) to minimize exposure to people outside the laboratory. The fume hood is the first level of containment and the laboratory space is the second level of containment.

Room pressure, or pressure differential, is created when one space (hallway) is at a different pressure than an adjoining space (laboratory). The Adaptive Offset Controller (AOC) creates a pressure differential by modulating supply air into and exhaust air out of the laboratory (hallway space is a constant volume system). The theory is that if more air is exhausted out than is supplied, the laboratory will be negative compared to the hallway. A set offset may not maintain an adequate pressure differential under all conditions. The AOC compensates for the unknown pressure differential by mounting a pressure differential sensor between the hallway and laboratory that confirms correct pressure differential is being maintained. If pressure is not being maintained, the AOC modulates the supply or exhaust air until pressure is maintained.

Negative Positive

Figure 1: Room Pressure

Negative room pressure is present when air flows from a hallway into the laboratory. If air flows from the laboratory into the hallway, the room is under positive pressure. Figure 1 gives a graphic example of positive and negative room pressure.

An example of negative pressure is a bathroom with an exhaust fan. When the fan is turned on, air is exhausted out of the bathroom creating a slight negative pressure when compared to the hallway. This pressure differential forces air to flow from the hallway into the bathroom.

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The S

UREFLOW device informs the laboratory users when the laboratory is under proper pressure, and provides

alarms when the room pressure is inadequate. If the room pressure is in the safe range, a green light is on. If the pressure is inadequate, a red alarm light and audible alarm turn on.

UREFLOW controller consists of three pieces: pressure sensor, Digital Interface Module (DIM), and Adaptive

The S Offset Controller (AOC). The components are typically located as follows; pressure sensor above the laboratory entrance, DIM is mounted close to laboratory entrance, and the AOC in the ceiling space near the laboratory entrance. The pressure sensor continuously measures the room pressure and provides room pressure information to the DIM and AOC. The DIM continuously reports the room pressure and activates the alarms when necessary. The AOC controls the supply and exhaust dampers to maintain the pressure differential. The AOC is a closed loop controller that is continuously measuring, reporting, and controlling room pressure.

Useful User Information

The DIM has a green light and red light to indicate room pressure status. The green light is on when the room has proper room pressure. The red light comes on when an alarm condition exists.

Sliding the door panel to the right reveals a digital display and keypad (Figure 2). The display shows detailed information about room pressure, alarms, etc. The keypad allows you to test the device, put the device into emergency mode, and program or change the device parameters.

Figure 2: Digital Interface Module (DIM)

UREFLOW™ controller has two levels of user information:

1. S

UREFLOW has a red light and green light to provide continuous information on room pressure

status.

2. S

UREFLOW controller has a hidden operator panel providing detailed room status information, self-

testing capabilities, and access to the software programming functions.

NOTE: The unit provides continuous room pressure status through the red and green light. The operator panel is

normally closed unless further information on room pressure status is needed, or software programming is required.

2 Part One

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Operator Panel

The DIM in Figure 3 shows the location of the digital display, keypad and lights. An explanation of the operator panel follows the figure.

Figure 3: S

Green / Red Light

The green light is on when all the conditions for proper room pressure are adequate. This light indicates the laboratory is operating safely. If any of the room pressure conditions cannot be satisfied, the green light turns off and the red alarm light turns on.

Operator Panel

A cover hides the operator panel. Sliding the door panel to the right exposes the operator panel (Figure 2).

Digital Display

The alphanumeric digital display is a two-line display that indicates actual room pressure (positive or negative), alarm status, menu options, and error messages. In normal operation (green light is on), the display indicates information about room pressure. If an alarm condition occurs, the display will change from STANDARD STANDARD NORMAL to read ALARM = *

* will state type of alarm; low pressure, high pressure, flow

When programming the unit, the display will change and now show menus, menu items, and current value of the item, depending on the specific programming function being performed.

NOTE: The AOC system will control room pressure without a pressure sensor installed. However, verification that

room pressure is being maintained is not possible. The display will not indicate room pressure or room pressure status when no pressure sensor is installed. The alarms can be programmed to indicate when low supply or exhaust flow is present.

Keypad

The keypad has six keys. The gray keys with black letters are user information keys. In normal operation these keys are active. Additionally, the red emergency key is active. The gray keys with blue characters are used to program the unit. A thorough description of each key is given on the next two pages.

UREFLOW Operator Panel–Open

User Basics 3

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User Keys - Gray with Black Letters

The four keys with black letters provide you information without changing the operation or the function of the unit.

TEST Key

The TEST key initiates an instrument self-test. Pressing the TEST key activates a scrolling sequence on the display that shows the product model number, software version, and all set point and alarm values. The unit then performs a self-test that tests the display, indicator lights, audible alarm, and internal electronics to ensure they are operating properly. If a problem with the unit exists, DATA ERROR will be displayed. You should have qualified personnel determine the problem with the unit.

RESET Key

The RESET key performs three functions. 1) Resets the alarm light, alarm contacts, and audible alarm when in a latched or non-automatic reset mode. The DIM must return to the safe or normal range before the RESET key will operate. 2) Resets the emergency function after the emergency key has been pressed (see EMERGENCY key). 3) Clears any displayed error messages.

MUTE Key

The MUTE key temporarily silences the audible alarm. The time the alarm is temporarily silenced is programmable by you (see MUTE TIMEOUT). When the mute period ends, the audible alarm turns back on if the alarm condition is still present.

NOTE: You can program the audible alarm to be permanently turned off (see AUDIBLE ALM).

AUX Key

The AUX key is active only in specialty applications and is not used on the standard S

UREFLOW. If the

AUX key is used, a separate manual supplement will explain the AUX key function.

Programming Keys - Gray with Blue Characters

The four keys with blue print are used to program or configure the unit to fit a particular application.

WARNING: Pressing these keys will change how the unit functions, so please thoroughly review the manual

before changing menu items.

MENU Key

The MENU key performs three functions. 1) Provides access to the menus when in the normal operating mode. 2) When the unit is being programmed, the MENU key acts as an escape key to remove you from an item or menu, without saving data. 3) Returns the unit to the normal operating mode. The MENU key is further described in the

Software Programming section of this manual.

SELECT Key

The SELECT key performs three functions. 1) Provides access to specific menus. 2) Provides access to menu items. 3) Saves data. Pressing the key when finished with a menu item will save the data and exit you out of the menu item.

S/T Keys

The S/T keys are used to scroll through the menus, menu items, and through the range of item values that can be selected. Depending on the item type the values may be numerical, specific properties (on/off), or a bar graph.

4 Part One

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Emergency Key - Red with Black Letters

EMERGENCY Key

The red EMERGENCY key puts the controller into emergency mode. If the room is under negative room pressure control, the emergency mode will maximize the negative pressure. Conversely, if the room is under positive room pressure control, the emergency mode will maximize the positive pressure.

Pressing the EMERGENCY key will cause the display to flash ”EMERGENCY”, the red alarm light to flash on and off and the audible alarm to beep intermittently. To return to control mode press the

EMERGENCY or RESET key.

Alarms

UREFLOW has visual (red light) and audible alarms to inform you of changing conditions. The alarm levels (set

S points) are determined by administrative personnel, Industrial Hygienists, or the facilities group depending on the organization.

The alarms, audible and visual, will activate whenever the preset alarm level is reached. Depending on the

UREFLOW items installed, programmed alarms will activate when room pressure is low or inadequate, when room

S pressure is high or too great, or when the supply or general exhaust air flow is insufficient. When the laboratory is operating safely, no alarms will sound.

Example: The low alarm is programmed to activate when the room pressure reaches -0.001 inches H

room pressure drops below -0.001 inches H

O (gets closer to zero), the audible and visual alarms

activate. The alarms turn off (when set to unlatched) when the unit returns to the safe range which is defined as negative pressure greater than -0.001 inches H

Visual Alarm Operation

The red light on the front of the unit indicates an alarm condition. The red light is on for all alarm conditions, low alarms, high alarms, and emergency. The light is on continuously in a low or high alarm condition and flashes in an emergency condition.

Audible Alarm Operation- EMERGENCY key When the EMERGENCY key is pressed, the audible alarm beeps intermittently until the EMERGENCY or RESET key is pressed terminating the emergency alarm. The emergency alarm cannot be silenced by pressing the MUTE key.

Audible Alarms - All Except Emergency

The audible alarm is continuously on in all low and high alarm conditions. The audible alarm can be temporarily silenced by pressing the MUTE key. The alarm will be silent for a period of time (see MUTE TIMEOUT to program time period). When the time out period ends, the audible alarm turns back on if the alarm condition is still present.

You can program the audible alarm to be permanently turned off (see AUDIBLE ALM). The red alarm light will still turn on in alarm conditions when audible alarm is turned off.

The audible and visual alarms can be programmed to either automatically turn off when the unit returns to the safe range or to stay in alarm until the RESET key is pressed (See ALARM RESET).

O. When the

User Basics 5

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Before Calling TSI

This manual should answer most questions and resolve most problems you may encounter. If you need assistance or further explanation, contact your local TSI representative or TSI. TSI is committed to providing high quality products backed by outstanding service.

Please have the following information available prior to contacting your authorized TSI Manufacturer's Representative or TSI:

• Model number of unit

• Software revision levels

• Facility where unit is installed

* First three items that scroll when TEST key is pressed

Due to the different S

UREFLOW models available, the above information is needed to accurately answer your

questions.

For the name of your local TSI representative or to talk to TSI service personnel, please call TSI at:

U.S. AND CANADA OTHER COUNTRIES

Sales & Customer Service: (800) 874-2811/(651) 490-2811 (001 651) 490-2811

Fax:

Fax: (651) 490-3824 (001 651) 490-3824

SHIP/MAIL TO: E-MAIL

TSI Incorporated answers@tsi.com ATTN: Customer Service 500 Cardigan Road WEB SITE Shoreview, MN 55126 www.tsi.com USA

Prior to shipping any components to TSI for service or repair, please utilize our convenient Return Material Authorization (RMA) Form, which is available online at

8682- ____

Sales & Customer Service:

http://rma.tsi.com.

6 Part One

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PART TWO

Technical Section

The AOC is ready to use after being properly installed. The pressure sensor is factory calibrated prior to shipping and should not need adjustment. The flow stations must be calibrated prior to using them. The Digital Interface Module (DIM) is programmed with a default configuration that can be easily modified to fit your application.

The Technical section is separated into five parts that cover all aspects of the unit. Each section is written as independently as possible to minimize flipping back and forth through the manual for an answer.

Software Programming section explains the programming keys on the DIM. In addition, the programming

The sequence is described, which is the same regardless of the menu item being changed. At the end of this section is an example of how to program the DIM.

Menu and Menu Item section lists all of the software items available to program and change. The items are

The grouped by menu which means all set points are in one menu, alarm items in another, etc. The menu items and all related information is listed in table format and includes menu item name, description of menu item, range of programmable values, and how the unit shipped from the factory (default values).

Setup / Checkout section; explains the AOC controller theory of operation, lists the menu items that need to be

The programmed for the system to operate, provides a programming example, and provides information to confirm system is operating correctly.

Calibration section describes the required technique to compare the pressure sensor reading to a thermal

The anemometer, and how to adjust the zero and span to obtain an accurate calibration. This section also describes how to zero a TSI flow station transducer.

Maintenance and Repair Part section covers all routine maintenance of equipment, along with a list of repair

The parts.

Software Programming

Programming the S keystroke procedure is followed. The programming keys are defined first, followed by the required keystroke procedure. At the end of this section is a programming example.

NOTE: The unit is always operating while programming unit (except when checking the control outputs). When a

menu item value is changed, the new value takes effect immediately after saving the change.

NOTE: This section covers programming the instrument through the keypad and display. If programming through

RS-485 communications, use the host computer’s procedure. The changes take place immediately upon “saving data.”

Programming Keys

The four keys with blue characters (refer to Figure 4) are used to program or configure the unit to fit your particular application. Programming the instrument will change how the unit functions, so thoroughly review the items to be changed.

UREFLOW controller is quick and easy if the programming keys are understood and the proper

Technical Section

Page 14

Figure 4: Programming Keys

MENU Key

The MENU key has three functions.

1. The MENU key is used to gain access to the menus when the unit is in the normal operating

mode. Pressing the key once will exit the normal operating mode and enter the programming mode. When the MENU key is first pressed, the first two menus are listed.

2. When the unit is being programmed, the MENU key acts like an escape key.

• When scrolling through the main menu, pressing the MENU key will return the unit to

standard operating mode.

• When scrolling through the items on a menu, pressing the MENU key will return you to the

list of menus.

• When changing data in a menu item, pressing the MENU key will escape out of the item

without saving changes.

3. When programming is complete, pressing the MENU key will return the unit to normal operating

mode.

SELECT Key

The SELECT key has three functions.

1. The SELECT key is used to gain access to specific menus. To access a menu, scroll through the menus (using arrow keys) and place the flashing cursor on the desired menu. Press the SELECT key to select the menu. The first line on the display will now be the selected menu and the second line will show the first menu item.

2. The SELECT key is used to gain access to specific menu items. To access a menu item scroll through the menu items until item appears. Press the SELECT key and the menu item will now appear on the first line of the display and the second line will show the item value.

3. Pressing the SELECT key when finished changing an item will save the data and exit back to the menu items. An audible tone (3 beeps) and visual display (“saving data”) gives confirmation data is being saved.

S/T Keys

The S/T keys are used to scroll through the menus, menu items, and through the range of item values that can be selected. Depending on the menu item selected the value may be numerical, specific property (on / off), or a bar graph.

NOTE: When programming a menu item, continuously pressing the arrow key will scroll through the

values faster than if arrow key is pressed and released.

Part Two

Page 15

Keystroke Procedure

The keystroke operation is consistent for all menus. The sequence of keystrokes is the same regardless of the menu item being changed.

1. Press the MENU key to access the main menu.

2. Use the S/T keys to scroll through the menu choices. The blinking cursor needs to be on the first letter of

the menu you want to access.

3. Press the SELECT key to access chosen menu.

4. The menu selected is now displayed on line one and the first menu item is displayed on line 2. Use the

S/T keys to scroll through the menu items. Scroll through the menu items until desired item is displayed.

NOTE: If “Enter Code” is flashing, the access code must be entered before you can enter the menu.

Access code is found in

Appendix D. Appendix D may have been removed from the manual for

security reasons.

5. Press the SELECT key to access chosen item. The top line of display shows menu item selected, while the

second line shows current item value.

6. Use the S/T keys to change item value.

7. Save the new value by pressing the SELECT key (pressing the MENU key will exit out of menu function

without saving data).

8. Press the MENU key to exit current menu and return to main menu.

9. Press the MENU key again to return to normal instrument operation.

If more than one item is to be changed, skip steps 8 and 9 until all changes are complete. If more items in the same menu are to be changed, scroll to them after saving the data (step 7). If other menus need to be accessed, press the

MENU key once to access list of menus. The instrument is now at step 2 of the keystroke sequence.

Programming Example

The following example demonstrates the keystroke sequence explained above. In this example the high alarm set point will be changed from -0.002 inches H

O to -0.003 inches H2O.

n Unit is in normal operation scrolling room pressure, flows, etc. Pressure is shown

in this case.

PRESSURE

-.00100 “H2O

o Press the MENU key to gain access to the menus.

The first two menu choices are displayed.

SET POINT ALARM

p Press the T key once. Blinking cursor should be on A in Alarm. Press the

SELECT key to access the ALARM menu.

NOTE: Blinking cursor must be on A in Alarm.

Line 1 shows menu selected.

Line 2 shows first menu item.

ALARM LOW ALARM

Technical Section

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q Press the T key once. HIGH ALARM will be shown on display.

r Press the SELECT key to access the high alarm set point. The item name

(HIGH ALARM) will now be displayed on line 1 and the item's current value will be displayed on line 2.

s Press the T key to change the high alarm set point to –0.003 inches H

t Press the SELECT key to save the new negative high alarm set point.

Three short beeps will sound indicating that the data is being saved.

Immediately after the data is saved, the S

UREFLOW controller

returns to the menu level displaying the menu title on the top line of the display and the menu item on the bottom line (goes to step

4).

WARNING: If the MENU key was pressed instead of the SELECT key, the new data would not have

been saved and the SUREFLOW controller would have escaped back to the menu level shown in step 3.

u Press the MENU key once to return to the menu level:

Menu selected

Item name

Item Name

Current Value

ALARM HIGH ALARM

HIGH ALARM

-.00200 "H2O

HIGH ALARM

- .00300 "H2O

HIGH ALARM Saving Data

ALARM HIGH ALARM

v Press the MENU key a second time to return to the normal operating level:

Unit is now back in normal operation

LARM

CONFIGURE

PRESSURE

-.00100 "H2O

Part Two

Page 17

Menu and Menu Items

UREFLOW controller is a very versatile device which can be configured to meet your specific application. This

The S section describes all of the menu items available to program and change. Changing any item is accomplished by using the keypad, or if communications are installed, through the RS-485 Communications port. If you are unfamiliar with the keystroke procedure, see provides the following information:

• Complete list of menu and all menu items.

• Gives the menu or programming name.

• Defines each menu item’s function; what it does, how it does it, etc.

• Gives the range of values that can be programmed.

• Gives default item value (how it shipped from factory).

The menus covered in this section are divided into groups of related items to ease programming. As an example all set points are in one menu, alarm information in another, etc. The manual follows the menus as programmed in the controller. The menu items are always grouped by menu and then listed in menu item order, not alphabetical order. Figure 5 shows a chart of all the Model 8682 controller menu items.

SET POINTS

ALARM

Programming Software for a detailed explanation. This section

CONFIGURE

CALIBRATION

SET POINT REM SET POINT VENT MIN SET COOLING FLOW UNOCCUPY SET MAX SUP SET MIN EXH SET MIN OFFSET MAX OFFSET TEMP SETP UNOCC TEMP

CONTROL

SPEED SENSITIVITY CONTROL SIG SUP CONT DIR EXH CONT DIR TEMP DIR REHEAT SIG KC VALUE TI VALUE KC OFFSET TEMP DB TEMP TR TEMP TI

LOW ALARM HIGH ALARM REM LOW ALM REM HIGH ALM MIN SUP ALM MAX EXH ALM ALARM RESET AUDIBLE ALM ALARM DELAY MUTE TIMEOUT

SYSTEM FLOW

TOT SUP FLOW TOT EXH FLOW OFFSET VALUE SUP SET POINT EXH SET POINT

UNITS EXH CONFIG ACCESS CODES

FLOW CHECK

SP1 FLOW IN SP2 FLOW IN SP3 FLOW IN SP4 FLOW IN EX1 FLOW IN EX2 FLOW IN HD1 FLOW IN HD2 FLOW IN HD3 FLOW IN HD4 FLOW IN HD5 FLOW IN HD6 FLOW IN HD7 FLOW IN

SENSOR SPAN ELEVATION TEMP CAL

DIAGNOSTICS

CONTROL SUP CONTROL EXH CONTROL TEMP SENSOR INPUT SENSOR STAT TEMP INPUT OCCUPANT SWT REMOTE SWT LOW ALM REL HIGH ALM REL LOW SUP REL HIGH EXH REL PRESS AOUT SUPPLY AOUT EXHAUST AOUT RESET TO DEF

Technical Section

Page 18

INPUT CHECK

INTERFACE

SUPPLY FLOW

EXHAUST FLOW

SUP 1 SUP 2 SUP 3 SUP 4 EXH 1 EXH 2 HOOD 1 HOOD 2 HOOD 3 HOOD 4 HOOD 5 HOOD 6 HOOD 7

NET PROTOCOL* NET ADDRESS* LON* MAC ADDRESS* OUTPUT RANGE OUTPUT SIG MAX FLOW OUT

SP1 DCT AREA SP2 DCT AREA SP3 DCT AREA SP4 DCT AREA SP1 FLO ZERO SP2 FLO ZERO SP3 FLO ZERO SP4 FLO ZERO FLO STA TYPE TOP VELOCITY SP LOW SETP SP HIGH SETP SP1 LOW CAL SP1 HIGH CAL

EX1 DCT AREA EX2 DCT AREA EX1 FLO ZERO EX2 FLO ZERO FLO STA TYPE TOP VELOCITY EX LOW SETP EX HIGH SETP EX1 LOW CAL EX1 HIGH CAL EX2 LOW CAL EX2 HIGH CAL RESET CAL

SP2 LOW CAL SP2 HIGH CAL SP3 LOW CAL SP3 HIGH CAL SP4 LOW CAL SP4 HIGH CAL RESET CAL

HOOD FLOW

HD1 DCT AREA HD2 DCT AREA HD3 DCT AREA HD4 DCT AREA HD5 DCT AREA HD6 DCT AREA HD7 DCT AREA HD1 FLO ZERO HD2 FLO ZERO HD3 FLO ZERO HD4 FLO ZERO HD5 FLO ZERO HD6 FLO ZERO HD7 FLO ZERO FLO STA TYPE TOP VELOCITY

HOOD CAL

HD1 LOW CAL HD1 HIGH CAL HD2 LOW CAL HD2 HIGH CAL HD3 LOW CAL HD3 HIGH CAL HD4 LOW CAL HD4 HIGH CAL HD5 LOW CAL HD5 HIGH CAL HD6 LOW CAL HD6 HIGH CAL HD7 LOW CAL HD7 HIGH CAL MIN HD1 FLOW MIN HD2 FLOW MIN HD3 FLOW MIN HD4 FLOW MIN HD5 FLOW MIN HD6 FLOW MIN HD7 FLOW RESET CAL

Figure 5: Menu Items - Model 8682 Controller

*LON Menu Item or MAC ADDRESS Menu Item will only appear as a menu option for the Model 8682 Adaptive

Offset Controller that includes an optional Lon Works or BACnet board. The Menu Items NET PROTOCOL and NET ADDRESS will be deleted as menu options on Model 8682 Adaptive Offset Controllers that include either the optional Lon Works or BACnet board.

Part Two

Page 19

Technical Section 13

SET POINTS MENU

SOFTWARE

MENU ITEM

PRESSURE SET POINT

REMOTE OR ALTERNATE PRESSURE SET POINT

VENTILATION MINIMUM SUPPLY FLOW SET POINT

SET POINT

REM SET POINT

VENT MIN SET

NAME ITEM DESCRIPTION ITEM RANGE

The SET POINT item sets the pressure control set point. The

UREFLOW controller will maintain this set point, negative or

S positive, under normal operating conditions.

0 to -0.19000 in. H 0 to +0.19000 H

Pressure differential is not maintained by direct pressure control; i.e., modulating dampers in response to pressure changes. The pressure signal is an AOC input that is used to calculate the required air flow offset value. The calculated offset value changes the supply (or exhaust) flow volume which changes the pressure differential. When the calculated offset value is between the MIN OFFSET and MAX OFFSET, room pressure control can be maintained. If the offset required to maintain pressure is less than the MIN OFFSET or greater than MAX OFFSET, pressure control will not be maintained.

The REM SET POINT item sets an alternate control set point.

UREFLOW controller will maintain the room pressure at the

The S alternate set point when this item is enabled.

0 to -0.19000 in. H 0 to +0.19000 in. H

This item is enabled when the REMOTE SWT contact closure, pins 3 and 4, is closed, or the RS 485 communications sends a command.

NOTE: The REM SET POINT disables the ALARM DELAY.

The VENT MIN SET item sets the ventilation supply airflow set point. This item provides a minimum supply air flow to meet the ventilation requirement, by preventing the supply flow from going below the preset minimum flow.

The controller will not allow the supply air damper to be closed further than the VENT MIN SET set point. If room pressure is not maintained at minimum supply flow, the general exhaust damper modulates open until pressure set point is reached

0-30,000 CFM

(0-14,100 l/s)

Linear based flow stations 0 to TOP VELOCITY times the duct area in square feet

): square meters (m2).

(ft

(provided offset is between MIN OFFSET and MAX OFFSET).

O or

DEFAULT

VALUE

-0.00100” H

Page 20

14 Part Two

SET POINTS MENU (continued)

MENU ITEM

SPACE COOLING SUPPLY FLOW SET POINT

SOFTWARE

NAME ITEM DESCRIPTION ITEM RANGE

COOLING FLOW

The COOLING FLOW item sets the space cooling supply airflow set point (CFM). This item defines a supply air flow intended to meet the space’s cooling requirements by allowing the supply flow to increase, gradually, to the COOLING FLOW set point, from a minimum ventilation rate, when the space temperature is too warm..

If room pressure is not maintained, the general exhaust damper modulates open until pressure set point is reached (provided offset is between MIN OFFSET and MAX OFFSET).

0-30,000 CFM

(0-14,100 l/s)

Linear based flow stations 0 to TOP VELOCITY times the duct area in square feet

): square meters (m2).

(ft

WIRING: This item requires a 1000 Ω platinum RTD

temperature sensor to be wired to the TEMPERATURE input (AOC pins 29 and 30). The temperature sensor toggles the AOC between VENT MIN SET and COOLING FLOW.

DEFAULT

VALUE

Page 21

Technical Section 15

SET POINTS MENU (continued)

SOFTWARE

MENU ITEM

UNOCCUPIED SUPPLY FLOW MINIMUM

MAXIMUM SUPPLY FLOW SET POINT

NAME ITEM DESCRIPTION ITEM RANGE

UNOCCUPY SET

MAX SUP SET

The UNOCCUPY SET item sets a minimum supply flow set point when the laboratory is unoccupied (requires fewer air changes per hour). When UNOCCUPY SET is active, the VENT MIN SET and COOLING FLOW set points are turned off, since only one minimum supply set point can be enabled.

The controller will not allow the supply air damper to be closed further than the UNOCCUPY SET set point. If room pressure is not maintained at minimum supply flow, the general exhaust damper modulates open until pressure set point is reached (provided required offset is between MIN OFFSET and MAX OFFSET).

WIRING: This item is enabled when the OCCUPANT SWT

contact closure is closed (pins 11 and 12, DIM), or the RS 485 communications sends a command. When switch input is open VENT MIN SET and COOLING FLOW are enabled and UNOCCUPY SET is disabled.

The MAX SUP SET item sets the maximum supply air flow into the laboratory. The controller will not allow the supply air damper to open further than the MAX SUP SET flow set point.

NOTE: The laboratory may not hold pressure set point when

supply air is limited.

0-30,000 CFM

(0-14,100 l/s)

Linear based flow stations 0 to TOP VELOCITY times the duct area in square feet

): square meters

(ft

0-30,000 CFM

(0-14,100 l/s)

Linear based flow stations 0 to TOP VELOCITY times the duct area in square feet

): square meters

(ft

DEFAULT

VALUE

OFF

Page 22

16 Part Two

SET POINTS MENU (continued)

MENU ITEM

MINIMUM EXHAUST FLOW SET POINT

MINIMUM FLOW OFFSET

MAXIMUM FLOW OFFSET

TEMPERATURE SET POINT

UNOCCUPIED TEMPERATURE SET POINT

SOFTWARE

NAME ITEM DESCRIPTION ITEM RANGE

MIN EXH SET

The MIN EXH SET item sets the minimum general exhaust air flow out of the laboratory. The controller will not allow the general exhaust air damper to close further than the MIN EXH SET flow set point.

NOTE: The laboratory may not hold pressure set point when

general exhaust air is constrained.

0-30,000 CFM

(0-14,100 l/s)

Linear based flow stations 0 to TOP VELOCITY times the duct area in square feet

): square meters

(ft

MIN OFFSET

The MIN OFFSET item sets the minimum air flow offset between total exhaust flow (fume hood, general exhaust, other exhaust) and total supply flow.

-10,000 to 10,000 CFM

MAX OFFSET

The MAX OFFSET item sets the maximum air flow offset between total exhaust flow (fume hood, general exhaust, other exhaust) and total supply flow.

-10,000 to 10,000 CFM

TEMP SETP

The TEMP SETP item sets the temperature control set point.

UREFLOW controller will maintain the temperature set point

The S

50°F - 85°F

under normal operating conditions.

UNOCC TEMP

The UNOCC TEMP item sets the temperature control set point while the room is in unoccupied mode.

50°F - 85°F

WIRING: This item is enabled when the OCCUPANT SWT

contact closure is closed (pins 11 and 12, DIM), or the RS 485 communications sends a command. When switch input is open TEMP SETP is enabled and UNOCC TEMP is disabled

DEFAULT

VALUE

OFF

68°F

Page 23

Technical Section 17

SET POINTS MENU (continued)

SOFTWARE

MENU ITEM

END OF

NAME ITEM DESCRIPTION ITEM RANGE

The END OF MENU item informs you that the end of a menu

has been reached. You can either scroll back up the menu to make changes, or press the SELECT or MENU key to exit out of the menu.

ALARM MENU

SOFTWARE

MENU ITEM

LOW PRESSURE ALARM

HIGH PRESSURE ALARM

REMOTE OR ALTERNATE LOW PRESSURE ALARM

REMOTE OR ALTERNATE HIGH PRESSURE ALARM

NAME ITEM DESCRIPTION ITEM RANGE

LOW ALARM

The LOW ALARM item sets the low pressure alarm set point. A low alarm condition is defined as when the room pressure falls below or goes in the opposite direction of the LOW ALARM set point.

HIGH ALARM

REM LOW ALM

The HIGH ALARM item sets the high pressure alarm set point. A high alarm condition is defined as when the room pressure rises above the HIGH ALARM set point.

The REM LOW ALM item sets a remote or second low pressure alarm set point. A remote low alarm condition is defined as when the room pressure falls below or goes in the opposite direction of the REM LOW ALM set point.

This item is enabled when the REMOTE SWT contact closure, pins 3 and 4, is closed, or the RS 485 communications sends a command.

REM HIGH ALM

The REM HIGH ALM item sets a remote or second high-pressure alarm set point. A high alarm condition is defined as when the room pressure rises above the REM HIGH ALM set point.

This item is enabled when the REMOTE SWT contact closure, pins 3 and 4, is closed, or the RS 485 communications sends a command.

DEFAULT

VALUE

DEFAULT

VALUE

OFF

0 to -0.18500 in. H

0 to +0.18500 in. H

OFF

0 to -0.18500 in. H

0 to +0.18500 in. H

OFF

0 to -0.18500 in. H

0 to +0.18500 in. H

OFF

0 to -0.18500 in. H

0 to +0.18500 in. H

OFF

Page 24

18 Part Two

ALARM MENU (continued)

MENU ITEM

MINIMUM SUPPLY FLOW ALARM

MAXIMUM EXHAUST FLOW ALARM

ALARM RESET

SOFTWARE

NAME ITEM DESCRIPTION ITEM RANGE

MIN SUP ALM

The MIN SUP ALM item sets the supply flow alarm set point. A minimum flow alarm is defined as when the supply duct flow is less than the MIN SUP ALM set point.

NOTE: Supply air duct size(s) SP# DCT AREA (Supply Flow

menu) must be entered before MIN SUP ALM can be accessed. Actual total supply air flow is found in TOT SUP FLOW menu item (system flow menu).

WIRING: This item is disabled when the UNOCCUPY SET is

enabled [SWITCH INPUT contact closure is closed

0-29,950 CFM

(0-14,125 l/s)

Linear based flow stations 0 to TOP VELOCITY times the supply duct area in square feet (ft meters (m

(pins 11 and 12, DIM), or the RS 485 communications sends a command].

MAX EXH ALM

The MAX EXH ALM item sets the general exhaust duct’s flow alarm set point. A maximum flow alarm is defined as when the general exhaust duct flow is greater than the MAX EXH ALM set point.

NOTE: General exhaust air duct size EX1 DCT AREA and / or

EX2 DCT AREA (Exhaust Flow menu) must be entered

before MAX EXH ALM can be accessed. Actual total exhaust air flow is found in TOT EXH FLOW menu item (SYSTEM FLOW menu).

0-30,000 CFM

(0-14,100 l/s)

Linear based flow stations 0 to TOP VELOCITY times the supply duct area in square feet (ft meters (m

ALARM RESET

The ALARM RESET item selects how the alarms terminate after the unit returns to control set point (pressure or flow). UNLATCHED (alarm follow) automatically resets the alarms

LATCHED

UNLATCHED

when the unit reaches control set point. LATCHED requires the staff to press the RESET key after the unit returns to control set point. The ALARM RESET affects the audible alarm, visual alarm, and relay output, which means all are latched or unlatched.

): square

DEFAULT

VALUE

OFF

UNLATCHED

Page 25

Technical Section 19

ALARM MENU (continued)

SOFTWARE

MENU ITEM

AUDIBLE ALARM

ALARM DELAY

MUTE TIMEOUT

END OF

NAME ITEM DESCRIPTION ITEM RANGE

AUDIBLE ALM

ALARM DELAY

MUTE TIMEOUT

The AUDIBLE ALM item selects whether the audible alarm is turned ON or OFF. Selecting ON requires the staff to press the MUTE key to silence the audible alarm. Selecting OFF permanently mutes all audible alarms, except when the EMERGENCY key is pressed.

The ALARM DELAY determines the length of time the alarm is delayed after an alarm condition has been detected. This delay affects the visual alarm, audible alarm, and relay outputs. An ALARM DELAY prevents nuisance alarms from people entering and leaving the laboratory.

The MUTE TIMEOUT determines the length of time the audible alarm is silenced after the MUTE key is pressed. This delay temporarily mutes the audible alarm.

NOTE: If the DIM is in alarm when MUTE TIMEOUT expires,

The END OF MENU item informs you that the end of a menu has been reached. You can either scroll back up the menu to make changes, or press the SELECT or MENU key to exit out of the menu.

the audible alarm turns on. When the pressure returns to the safe range, the MUTE TIMEOUT is canceled. If the room goes back into an alarm condition, the MUTE key must be pressed again to mute the audible alarm.

DEFAULT

VALUE

ON or OFF

20–600 SECONDS

5 to 30 MINUTES

20 SECONDS

5 MINUTES

Page 26

20 Part Two

ALARM CONSTRAINTS

There are a number of constraints built into the software that prevent users from programming conflicting alarm information. These are as follows:

1. The AOC does not allow the pressure

Example

2. The minimum flow

3. The pressure set either positive or negative. The AOC does not allow one positive alarm and one negative alarm.

4. Alarms do not terminate until the pressure or flow slightly exceeds alarm set point.

5. The ALARM RESET item selects how the alarms will terminate when controller returns to the safe range. The pressure and flow alarms all terminate the

same; they are either latched or unlatched. If unlatched is selected, the alarms automatically turn off when the value slightly exceeds set point. If latched is selected, the alarms will not terminate until the controller returns to set point and the RESET key is pressed.

6. There is a programmable ALARM DELAY that determines how long to delay before activating the alarms. This delay affects all pressure, remote and flow

alarms.

7. The MUTE TIMEOUT item sets the length of time the audible alarm is off for all pressure and flow alarms.

8. The display can only show one alarm message. Therefore, the controller has an alarm priority system, with the highest priority alarm being displayed. If

multiple alarms exist, the lower priority alarms will not display until after the highest priority alarm has been eliminated. The alarm priority is as follows:

Pressure sensor - low alarm Pressure sensor - high alarm Low supply flow alarm Low exhaust flow alarm Data error

alarms to be programmed within 20 ft/min (0.00028 in. H2O at 0.001 in. H2O) of the control set point.

: The control SET POINT is set at -0.001 in. H2O. The LOW ALARM set point cannot be set higher than -0.00072 in. H2O. Conversely, the

HIGH ALARM set point cannot be set lower than -0.00128 in. H

alarm: MIN SUP ALM must be programmed to be at least 50 CFM less than the minimum flow set point.

alarms: LOW ALARM, HIGH ALARM can be programmed for positive or negative pressure. However, both the low and high alarm must be

9. The low and high pressure alarms are absolute values. The chart below shows how the values must be programmed in order to operate correctly.

-0.2 inches H

O 0 +0.2 inches H2O

(maximum negative) (maximum positive)

High Negative Low Zero Low Positive High Negative Set point Negative Positive Set point Positive Alarm Alarm Alarm Alarm

The value of each set point or alarm is unimportant (except for small dead band) in graph above. It is important to understand that the negative (positive) low alarm must be between zero (0) pressure and the negative (positive) set point, and that the high alarm is a greater negative (positive) value than set point.

Page 27

Technical Section 21

CONFIGURE MENU

SOFTWARE

MENU ITEM

DISPLAY UNITS UNITS

GENERAL EXHAUST DUCT CONFIGURATION

EXH CONFIG

NAME ITEM DESCRIPTION ITEM RANGE

The UNITS item selects the unit of measure that the DIM displays all values (except calibration span). These units display for all menu items set points, alarms, flows, etc.

The EXH CONFIG menu item determines the exhaust configuration. If the general exhaust duct is separate from the total exhaust select UNGANGED (left side of Figure 6). If the general exhaust duct is part of the total exhaust select

FT/MIN, m/s, in. H Pa

UNGANGED or

GANGED

GANGED (right side of Figure 6). The correct configuration is required for the control algorithm to function correctly.

DEFAULT

VALUE

UNGANGED

NOTE: In either the GANGED or UNGANGED configuration

a general exhaust flow measurement is required.

ACCESS

CODES

The ACCESS CODES item selects whether an access code (pass code) is required to enter any menu. The ACCESS

CODES item prevents unauthorized access to a menu. If ACCESS CODES is ON, a code is required before the menu

can be entered. Conversely, if ACCESS CODES is OFF, no code is required to enter the menu.

END OF

The END OF MENU item informs you that the end of a menu has been reached. You can either scroll back up the menu to make changes, or press the SELECT or MENU key to exit out of the menu.

Figure 6: Exhaust Configuration

ON or OFF

OFF

Page 28

22 Part Two

CALIBRATION MENU

MENU ITEM

SENSOR SPAN SENSOR

ALTITUDE ELEVATION

TEMPERATURE CALIBRATION

END OF

SOFTWARE

NAME ITEM DESCRIPTION ITEM RANGE

SPAN

The SENSOR SPAN item is used to match or calibrate the TSI pressure sensor (velocity sensors) to the average room pressure velocity as measured by a portable air velocity meter.

A sensor zero should be established prior to adjusting the sensor span, if the sensor was cleaned with a liquid cleaner (see

calibrated. No initial

adjustment should be

NONE

Unit is factory

necessary.

Calibration section following menu item listing).

The ELEVATION item is used to enter the elevation of the building above sea level. This item has a range of 0-10,000 feet in 1,000 foot increments. The pressure value needs to be

0–10,000 feet above sea level

corrected due to changes in air density at different elevations.

TEMP CAL

The TEMP CAL item is used to match or calibrate the S

UREFLOW temperature sensor to the actual space temperature

NONE

as measured by a portable reference meter.

The END OF MENU item informs you that the end of a menu has been reached. You can either scroll back up the menu to make changes, or press the SELECT or MENU key to exit out of the menu.

DEFAULT

VALUE

Page 29

Technical Section 23

CONTROL MENU

SOFTWARE

MENU ITEM

SPEED SPEED

SENSITIVITY SENSITIVITY

NAME ITEM DESCRIPTION ITEM RANGE

The SPEED item is used to select the control output speed (supply and general exhaust). When this item is selected, a bar graph is shown on the display. There are 10 bars, each one representing 10% of speed. Starting from the right side (+ sign), 10 bars displayed indicates maximum speed. This is the fastest the controller will operate. 1 bar is the slowest the controller will operate. The more bars displayed, the faster the control output.

The SENSITIVITY item is used to select the integral dead band. The integral dead band determines when the controller uses integral control (slow control), and when the controller enters PID control (fast control). When this item is selected, a bar graph will be shown on the display.

There are 10 bars total, with each one representing 50 CFM. Starting from the right side (+ sign), 10 bars displayed indicates no dead band so the controller is always in PID control mode. Each bar missing represents ±50 CFM of integral dead band. The less bars displayed, the larger the integral dead band. For example, with 8 bars displayed (2 bars missing) and an offset of 500 CFM, the integral dead band is between 400 and 600 CFM. When the measured offset is within this range, integral or slow control is used. However, when the flow offset falls below 400 CFM or rises above 600 CFM, PID control is enabled until the unit returns within the dead band.

1 to 10 bars

0 to 10 bars

DEFAULT

VALUE

5 bars

The SENSITIVITY item has a unique feature that when zero bars are displayed, the unit never goes into PID control. The control output is always a slow control signal.

WARNING: When SENSITIVITY is set for 10 bars, the

system is always in PID control, which will probably cause an unstable system. It is recommended that SENSITIVITY be set at 9 bars or less.

Page 30

24 Part Two

CONTROL MENU (continued)

MENU ITEM

CONTROL SIGNAL

SUPPLY CONTROL DIRECTION

EXHAUST CONTROL DIRECTION

TEMPERATURE CONTROL DIRECTION

REHEAT CONTROL SIGNAL

SOFTWARE

NAME ITEM DESCRIPTION ITEM RANGE

CONTROL SIG

SUP CONT DIR

EXH CONT DIR

TEMP DIR

REHEAT SIG

The CONTROL SIG item switches both the supply and exhaust control outputs from 0–10 VDC to 4–20 mA.

TSI actuators require a 0-10 VDC control signal.

The SUP CONT SIG item determines the supply control signal’s output direction. As an example; if the control system closes the supply damper instead of opening the damper, this option will reverse the control signal to now open the damper.

The EXH CONT SIG item determines the exhaust control signal’s output direction. As an example; if the control system closes the exhaust damper instead of opening the damper, this option will reverse the control signal to now open the damper.

The TEMP CONT SIG item determines the temperature control signal’s output direction. As an example; if the control system closes the reheat valve instead of opening the valve, this option will reverse the control signal to now open the valve.

The REHEAT SIG item switches the temperature control output from 0–10 VDC to 4–20 mA.

4–20 mA or 0–10 VDC

Direct or Reverse

4–20 mA or 0–10 VDC

DEFAULT

VALUE

0-10 VDC

Direct

0-10 VDC

Page 31

Technical Section 25

CONTROL MENU (continued)

SOFTWARE

MENU ITEM

Kc VALUE Ti VALUE

NAME ITEM DESCRIPTION ITEM RANGE

Kc VALUE Ti VALUE

WARNING: The Kc VALUE and Ti VALUE allow you to

manually change the primary PID control loop variables. DO NOT CHANGE THESE

VALUES UNLESS YOU HAVE A THOROUGH UNDERSTANDING OF PID CONTROL LOOPS. CONTACT TSI FOR ASSISTANCE PRIOR TO CHANGING ANY VALUES. Contact TSI for assistance in

determining your control problem and for instructions on how to change a value. Incorrectly changing a value will result in poor or non-existent control.

Suggestion: Before changing Kc or Ti, change the SPEED

or adjust the SENSITIVITY to try to eliminate the problem.

The Kc VALUE item changes the gain control coefficient of the primary control loop (flow tracking loop). When this item is entered, a value for Kc is indicated on the display. If the AOC is not controlling correctly, the Kc gain control coefficient may need adjusting. Decreasing Kc will slow the control system down, which will increase stability. Increasing Kc will increase the control system which may cause system instability.

The Ti VALUE item changes the integral control coefficient of the primary control loop (flow tracking loop). When this item is entered, a value for Ti is indicated on the display. If the AOC is not controlling correctly, the unit may have an inappropriate integral control coefficient. Increasing Ti will slow the control system which will increase stability. Decreasing Ti will increase the control system speed which may cause system instability.

Kc = 0–1000

Ti = 0-1000

The range of values is very large. Poor control will occur if values are more than twice or less than ½ the default value

DEFAULT

VALUE

Kc = 80

Ti = 200

Page 32

26 Part Two

CONTROL MENU (continued)

MENU ITEM

Kc OFFSET

SOFTWARE

NAME ITEM DESCRIPTION ITEM RANGE

Kc OFFSET

WARNING: The Kc OFFSET sets the pressure control PID

variable. DO NOT CHANGE THIS VALUE

UNLESS YOU HAVE A THOROUGH UNDERSTANDING OF PID CONTROL LOOPS. CONTACT TSI FOR ASSISTANCE PRIOR TO CHANGING ANY VALUES.

Contact TSI for assistance in determining your control problem and for instructions on how to change a value. Incorrectly changing a value will result in poor or non-existent control.

The Kc OFFSET item changes the gain control coefficient of the secondary control loop (pressure control loop). The pressure control loop is very slow when compared to the primary flow control loop. This menu item should not be changed unless problems with the pressure control loop can be established (confirm problem is not with primary flow control loop).

When this item is entered, a value for Kc is indicated on the display. Decreasing Kc will slow the pressure control loop down, while increasing Kc will increase the pressure control loop speed.

Kc = 0–1000

The range of values is very large. Poor control will occur if values are more than twice or less than ½ the default value

DEFAULT

VALUE

Kc = 200

Page 33

Technical Section 27

CONTROL MENU (continued)

SOFTWARE

MENU ITEM

TEMPERATURE SENSITIVITY

NAME ITEM DESCRIPTION ITEM RANGE

TEMP DB

The TEMP DB item determines the controller’s temperature control deadband, which is defined as the temperature range above and below the temperature set point (TEMP SETP), where the controller will not take corrective action.

Temperature F

0 15304560

Time

If TEMP DB is set to ±1.0°F, and the TEMP SETP is set to

70.0 °F, the controller will not take corrective action unless the space temperature is below 69.0°F or above 71.0°F.

±0.0°F to ±1.0°F

DEFAULT

VALUE

±0.3°F

Page 34

28 Part Two

CONTROL MENU (continued)

MENU ITEM

TEMPERATURE THROTTLING RANGE

SOFTWARE

NAME ITEM DESCRIPTION ITEM RANGE

TEMP TR

The TEMP TR item determines the controller’s temperature

2.0°F to 20.0°F 6.0°F control throttling range, which is defined as the temperature range for the controller to fully open and fully close the reheat valve.

110

100

% Open

64 65 66 67 68 69 70 71 72 73 74 75 76

6F Throttling

Range

Temperature (F)

If TEMP TR is set to 3.0°F, and the TEMP SETP is set to

70.0°F, the reheat valve will be fully open when the space temperature is 67°F. Similarly, the reheat valve will be fully closed when the space temperature is 73.0°F.

DEFAULT

VALUE

Page 35

Technical Section 29

CONTROL MENU (continued)

SOFTWARE

MENU ITEM

TEMPERATURE INTEGRAL TIME

END OF

NAME ITEM DESCRIPTION ITEM RANGE

TEMP TI

WARNING: The TEMP TI item provides you with the ability

The TEMP TI item is used to read and change the temperature control integral time. When this item is entered, a value for the throttling range is indicated on the display in seconds.

The integral time is set based on the lag time of the temperature control process. The purpose of integral control is to eliminate the offset associated with proportional control. A longer integral time will result in a more stable but slower control system. A shorter integral time will provide quicker reaction to changes in temperature but may result in an unstable system.

The END OF MENU item informs you that the end of a menu has been reached. You can either scroll back up the menu to make changes, or press the SELECT or MENU key to exit out of the menu.

DEFAULT

VALUE

0 to 10,000 seconds 2400 seconds to manually change the temperature control loop algorithm. DO NOT CHANGE THIS VALUE

UNLESS YOU HAVE A THOROUGH UNDERSTANDING OF CONTROL LOOPS. CONTACT TSI FOR ASSISTANCE PRIOR TO CHANGING ANY VALUES. Contact TSI

for assistance in determining your control problem and for instructions on how to change a value. Incorrectly changing a value will result in poor or nonexistent control.

Page 36

30 Part Two

SYSTEM FLOW MENU

MENU ITEM

TOTAL SUPPLY AIR FLOW

TOTAL EXHAUST AIR FLOW

CONTROL OFFSET VALUE

SUPPLY FLOW SET POINT (CALCULATED)

SOFTWARE

NAME ITEM DESCRIPTION ITEM RANGE

TOT SUP FLOW

The TOT SUP FLOW menu item displays the current total measured supply flow into the laboratory. This item calculates total supply by summing SP1 FLOW IN though SP4 FLOW IN. This is a system information only menu item; no

NONE: Read only value

programming is possible.

TOT EXH FLOW

The TOT EXH FLOW menu item displays the current total measured exhaust flow out of the laboratory. This item calculates total exhaust by summing EX1 FLOW IN, EX2 FLOW IN, and HD1 FLOW IN

through HD7 FLOW IN. This

NONE: Read only value

is a system information only menu item; no programming is possible.

OFFSET VALUE

The OFFSET VALUE menu item displays the actual flow offset being used to control the laboratory. The OFFSET VALUE is calculated by the AOC control algorithm, which uses the MIN OFFSET, MAX OFFSET, and SET POINT items to calculate required offset. This is a system information only

NONE: Read only value

menu item: no programming is possible.

SUP SET POINT

The SUP SET POINT menu item displays the supply flow set point, which is calculated by the AOC control algorithm. The calculated SUP SET POINT is a diagnostic item used to compare the actual TOT SUP FLOW to the calculated flow (they should match within 10%). This is a system information

NONE: Read only value

only menu item: no programming is possible.

DEFAULT

VALUE

NONE

Page 37

Technical Section 31

SYSTEM FLOW MENU (continued)

SOFTWARE

MENU ITEM

GENERAL EXHAUST FLOW SET POINT (CALCULATED)

END OF

NAME ITEM DESCRIPTION ITEM RANGE

EXH SET POINT

The EXH SET POINT menu item displays the general exhaust flow set point, which is calculated by the AOC control algorithm. The EXH SET POINT is a diagnostic item used to compare the actual EX1 FLOW IN and EX2 FLOW IN to the calculated flow (they should match within 10%). This is a system information only menu item; no programming is possible.

The END OF MENU item informs you that the end of a menu

has been reached. You can either scroll back up the menu to make changes, or press the SELECT or MENU key to exit out of the menu.

NONE: Read only value

DEFAULT

VALUE

NONE

Page 38

32 Part Two

FLOW CHECK MENU

MENU ITEM

INDIVIDUAL SUPPLY AIR FLOW

INDIVIDUAL GENERAL EXHAUST FLOW

SOFTWARE

NAME ITEM DESCRIPTION ITEM RANGE

SP1 FLOW IN SP2 FLOW IN SP3 FLOW IN SP4 FLOW IN

The SP# FLOW IN menu item displays the current supply air flow. This item is a diagnostics tool used to compare the supply flow to a traverse of the duct work. If flow error is greater than 10%, calibrate the flow station. In addition, summing SP1

FLOW IN through SP4 FLOW IN should equal TOT SUP FLOW.

When a volt meter is hooked to the flow station output, a voltage should be displayed. The exact voltage displayed is relatively unimportant. It is more important that the voltage is

NONE: Read only value

changing which indicates the flow station is working correctly.

EX1 FLOW IN EX2 FLOW IN

The EX# FLOW IN menu item displays the current exhaust flow from a general exhaust. This item is a diagnostics tool used to compare the general exhaust flow to a traverse of the duct work. If flow error is greater than 10%, calibrate the flow station.

When a volt meter is hooked to the flow station output, a

NONE: Read only value

voltage should be displayed. The exact voltage displayed is relatively unimportant. It is more important that the voltage is changing which indicates the flow station is working correctly.

DEFAULT

VALUE

NONE

Page 39

Technical Section 33

FLOW CHECK MENU (continued)

SOFTWARE

MENU ITEM

INDIVIDUAL FUME HOOD EXHAUST FLOW

END OF

NAME ITEM DESCRIPTION ITEM RANGE

HD1 FLOW

through HD7

IN FLOW IN

The HD# FLOW IN menu item displays the current exhaust flow from a fume hood. This item is a diagnostics tool to compare the hood flow reading to a traverse of the duct work. If flow reading and traverse match within 10%, no change is needed. If flow error is greater than 10%, calibrate the flow station.

When a volt meter is hooked to the flow station output, a voltage should be displayed. The exact voltage displayed is relatively unimportant. It is more important that the voltage is changing which indicates the flow station is working correctly.

The END OF MENU item informs you that the end of a menu

has been reached. You can either scroll back up the menu to make changes, or press the SELECT or MENU key to exit out of the menu.

NONE: Read only value

DEFAULT

VALUE

NONE

Page 40

34 Part Two

DIAGNOSTICS MENU

MENU ITEM

SUPPLY AIR CONTROL OUTPUT

EXHAUST AIR CONTROL OUTPUT

REHEAT VALVE CONTROL OUTPUT

SOFTWARE

NAME ITEM DESCRIPTION

CONTROL SUP

CONTROL EXH

CONTROL TEMP

The CONTROL SUP item manually changes the control output signal to the supply air actuator/damper (or motor speed drive). When this item is entered, a value between 0% OPEN and 100% OPEN will be shown on the display indicating the control output value. Pressing the S/T keys change the count on the display. Pressing the S key increases the displayed value, while pressing the T key decreases the displayed value. The supply air damper or VAV box should change (modulate) as the number changes. Depending on the actuator’s jumper position, 0% OPEN or 100% OPEN is full open on damper. Conversely 100% OPEN or 0% OPEN will be full closed. A value of 50% OPEN should position the damper approximately 1/2 open. On units controlling variable frequency drives, fan speed should increase or decrease as numbers change.

WARNING: The CONTROL SUP function overrides the AOC control signal. Adequate room pressure will not

be maintained while in this item.

The CONTROL EXH item manually changes the control output signal to the exhaust air actuator/damper (or motor speed drive). When this item is entered, a number between 0% OPEN and 100% OPEN will be shown on the display indicating the control output value. Pressing the S/T keys change the count on the display. Pressing the S key increases the displayed value, while pressing the T key decreases the displayed value. The exhaust air damper or VAV box should change (modulate) as the number changes. Depending on the actuator’s jumper location 0% OPEN or 100% OPEN is full open on damper. Conversely 100% OPEN or 0% OPEN will be full closed. A value of 50% OPEN should position the damper approximately 1/2 open. On units controlling variable frequency drives, fan speed should increase or decrease as numbers change.

WARNING: The CONTROL EXH function overrides the AOC control signal. Adequate room pressure will not

be maintained while in this item.

The CONTROL TEMP item manually changes the control output signal to the reheat valve. When this item is entered, a number between 0% OPEN and 100% OPEN will be shown on the display indicating the control output value. Pressing the S/T keys change the count on the display. Pressing the S key increases the displayed value, while pressing the T key decreases the displayed value. The reheat valve position should change (modulate) as the number changes. Depending on the actuator, 0% OPEN or 100% OPEN is full open on valve. Conversely 100% OPEN or 0% OPEN will be full closed. A value of 50% OPEN should position the damper approximately 1/2 open.

WARNING: The CONTROL TEMP function overrides the AOC control signal. Adequate room temperature will

not be maintained while in this item.

Page 41

Technical Section 35

DIAGNOSTICS MENU (continued)

SOFTWARE

MENU ITEM

SENSOR COMMUNICATION

TEMPERATURE INPUT

UNOCCUPY SET INPUT

NAME ITEM DESCRIPTION

SENSOR STAT

TEMP INPUT

OCCUPANT SWT

The SENSOR STAT item verifies that the RS-485 communications between the pressure sensor and DIM is working correctly. Pressure sensor error messages do not display on DIM except when SENSOR STAT item is selected. This item displays NORMAL if communications are established correctly. If problems exist, one of four error messages will display:

COMM ERROR - DIM cannot communicate with sensor. Check all wiring and pressure sensor address. Address

must be 1.

SENS ERROR - Problem with sensor bridge. Physical damage to pressure sensor or sensor circuitry. Unit is not

field repairable. Send to TSI for repair.

CAL ERROR - Calibration data lost. Sensor must be returned to TSI to be calibrated. DATA ERROR - Problem with EEPROM, field calibration, or analog output calibration lost. Check all data

programmed and confirm unit is function correctly.

The TEMP INPUT item reads the input from the temperature sensor. When this item is entered, a voltage will be indicated on the display. The exact voltage displayed is relatively unimportant. It is more important that the voltage changes, indicating the temperature sensor is working correctly. The output range that can be read is resistance.

The OCCUPANT SWT item reads the input of the OCCUPANT SWT contact pins 11 and 12 (DIM). When this item is entered, the display will indicate either open or closed. If the display indicates open, the AOC uses the VENT MIN SET or COOLING FLOW as the minimum supply flow set point. If the display indicates closed, the AOC uses UNOCCUPY SET as the minimum supply flow set point. The AOC will use the SET POINT pressure set point in either case.

Page 42

36 Part Two

DIAGNOSTICS MENU (continued)

MENU ITEM

REM SET POINT INPUT

RELAY OUTPUT

PRESSURE ANALOG OUTPUT

SUPPLY ANALOG OUTPUT

SOFTWARE

NAME ITEM DESCRIPTION

REMOTE SWT

LOW ALM REL

HIGH ALM REL

LOW SUP REL

HIGH SUP REL

PRESS AOUT

SUPPLY AOUT

The REMOTE SWT item reads the input of the REMOTE SWT contact pins 3 and 4. When this item is entered, the display will indicate either open or closed. If the display indicates open, the AOC uses the SET POINT pressure set point. If the display indicates closed, the AOC uses the REM SET POINT pressure set point.

The relay menu items are used to change the state of a particular relay contact: LOW, HIGH, LOW SUP, HIGH SUP. When an item is entered, the display will indicate either OPEN or CLOSED. The S/T keys are used to toggle the state of the relay. Pressing the S key will OPEN the alarm contact. Pressing the T key will CLOSE the alarm contact. When the contact is closed, the relay is in an alarm condition.

The PRESS AOUT item is used to verify the analog outputs are working. When this item is entered, the number shown on the display indicates the last analog output value. The value displayed ranges from 0 to 255. The value 255 corresponds to 0 volts (4 mA) output and 0 corresponds to 10 volts (20 mA) output. Pressing the S/T keys change the count on the display. Pressing the S key should increase the analog output. Pressing the T key will decrease the analog output.

The PRESS AOUT function used in conjunction with a volt meter will verify the individual analog output is operating correctly.

The SUPPLY AOUT item is used to verify the analog outputs are working. When this item is entered, the number shown on the display indicates the last analog output value. The value displayed ranges from 0 to 255. The value 255 corresponds to 0 volts (4 mA) output and 0 corresponds to 10 volts (20 mA) output. Pressing the S/T keys change the count on the display. Pressing the S key should increase the analog output. Pressing the T key will decrease the analog output.

The SUPPLY AOUT function used in conjunction with a volt meter will verify the individual analog output is operating correctly.

Page 43

Technical Section 37

DIAGNOSTICS MENU (continued)

SOFTWARE

MENU ITEM

EXHAUST ANALOG OUTPUT

RESET THE CONTROLLER TO FACTORY DEFAULT SETTINGS

END OF

NAME ITEM DESCRIPTION

EXHAUST AOUT

RESET TO DEF

The EXHAUST AOUT item is used to verify the analog outputs are working. When this item is entered, the number shown on the display indicates the last analog output value. The value displayed ranges from 0 to 255. The value 255 corresponds to 0 volts (4 mA) output and 0 corresponds to 10 volts (20 mA) output. Pressing the S/T keys change the count on the display. Pressing the S key should increase the analog output. Pressing the T key will decrease the analog output.

The EXHAUST AOUT function used in conjunction with a volt meter will verify the individual analog output is operating correctly.

When this menu item is entered, the 8682 will prompt the user to verify that they want to do this by indicating NO. Use the S keys change the display to YES, then press the SELECT key to reset the controller to its factory defaults. Pressing the MENU key before the SELECT key will exit out of the menu item.

WARNING: If YES is selected, the Model 8682 will reset all menu items to their factory default settings: The

The END OF MENU item informs you that the end of a menu has been reached. You can either scroll back up the menu to make changes, or press the SELECT or MENU key to exit out of the menu.

controller will have to be reprogrammed and recalibrated after this operation is completed.

Page 44

38 Part Two

INPUT CHECK MENU

MENU ITEM

INDIVIDUAL SUPPLY FLOW SIGNAL CHECK

INDIVIDUAL EXHAUST FLOW SIGNAL CHECK

INDIVIDUAL FUME HOOD EXAUST FLOW SIGNAL CHECK

END OF

SOFTWARE

NAME ITEM DESCRIPTION ITEM RANGE

SUP 1

through

SUP 4

When one of these items is entered, a voltage, representing the corresponding flow input, will be displayed. If the voltage displayed is negative, double check the polarity of the flow input wiring.

NONE: Read only value

EXH 1

and

EXH 2

HOOD 1

through

HOOD 7

When one of these items is entered, a voltage, representing the corresponding flow input, will be displayed. If the voltage displayed is negative, double check the polarity of the flow input wiring.

NONE: Read only value

The END OF MENU item informs you that the end of a menu

has been reached. You can either scroll back up the menu to make changes, or press the SELECT or MENU key to exit out of the menu.

DEFAULT

VALUE

NONE

Page 45

Technical Section 39

INTERFACE MENU

SOFTWARE

MENU ITEM

NETWORK PROTOCOL**

NETWORK ADDRESS**

LON** LON

**The LON Menu Item will replace the Network Protocol and Network Address Menu Item on S

NAME ITEM DESCRIPTION ITEM RANGE

NET PROTOCOL

The NET PROTOCOL item selects the communications protocol used to interface with the building management system. If LONWORK’s interface is being used, this menu item is deleted; no selection is required.

NET ADDRESS

The NET ADDRESS item is used to select the main network address of the individual room pressure device. Each unit on the network must have its own unique address. The values range from 1–247. If RS-485 communications are being used, then a unique NET ADDRESS must be entered into the unit.

There is no priority between the RS-485 and keypad. The most recent signal by either RS-485 or keypad will initiate a change.

RS-485 communications allows you access to all menu items except calibration and control items. The RS-485 network can initiate a change at any time.

When the SERVICE PIN option is selected, the Model 8682 sends a broadcast message containing its Neuron ID and program ID. This is required to install the Model 8682 on the LonWorks network, or to reinstall the Model 8682 after using the GO UNCONFIGURED command.

Selecting the GO UNCONFIGURED option resets the Model 8682’s authentication key. This is required in the event a foreign network tool inadvertently acquires a Model 8682 and installs it with network management authentication. The Model 8682’s owner will then be unable to reclaim the Model 8682 over the network.

DEFAULT

VALUE

MODBUS, N2,

MODBUS

1–247

SERVICE PIN

GO UNCONFIGURED

UREFLOW controllers provided with the LonWorks board.

Page 46

40 Part Two

INTERFACE MENU (continued)

MENU ITEM

MAC ADDRESS**

ANALOG PRESSURE SIGNAL OUTPUT RANGE

SOFTWARE

NAME ITEM DESCRIPTION ITEM RANGE

MAC ADDRESS

The MAC ADDRESS assigns the device an address on the MS/TP BACnet network. This address must be unique for each

1-127

device on the BACnet network.

OUTPUT RANGE

The OUTPUT RANGE item selects the resolution range of the linear analog pressure signal output menu item PRESS AOUT.

LOW or HIGH

There are 2 choices:

LOW -0.01000 to +0.01000 in. H

0, or

-500 to 500 FPM, or

-2.5 to 2.5 m/s, or

-25 to 25 Pa

HIGH -0.10000 to +0.10000 in. H

0, or

-1000 to 1000 FPM, or

-5.0 to 5.0 m/s, or

-50 to 50 Pa

0 volt / 4 mA represents maximum negative pressure differential.

5 volts / 12 mA represents a 0 room pressure differential.

10 volts / 20 mA represents maximum positive pressure differential.

If the actual pressure exceeds the range, the output remains at maximum or minimum depending on direction of flow.

The AOC

updates the analog output every 0.1 second.

DEFAULT

VALUE

HIGH

NOTE: The units displayed for OUTPUT RANGE values

are determined by the UNITS menu item in the CONFIGURE MENU.

OUTPUT SIGNAL

OUTPUT SIG

The OUTPUT SIG item selects the type of analog output signal, either 0-10 VDC or 4-20 mA. This item changes 3 analog outputs; pressure differential (DIM terminals 9, 10), total supply flow (TOT SUP FLOW), and total exhaust flow (TOT

0–10 VDC or 4–20 mA

0–10 VDC

EXH FLOW) AOC terminals 50, 51, 52, and 53.

**The MAC ADDRESS Menu Item replaces the Network Address Menu Item on SUREFLOW controllers provided with the BACnet MSTP board.

Page 47

Technical Section 41

INTERFACE MENU (continued)

SOFTWARE

MENU ITEM

CONFIGURE MAXIMUM FLOW OUTPUT

END OF

NAME ITEM DESCRIPTION ITEM RANGE

MAX FLOW OUT

The MAX FLOW OUT item scales the flow analog outputs, pins 50, 51, 52, 53. The value selected equates to 10 volts or 20 mA. Zero volts or 4 mA equates to no flow. This item affects two analog outputs: TOT SUP FLOW and TOT EXH FLOW.

The END OF MENU item informs you that the end of a menu has been reached. You can either scroll back up the menu to make changes, or press the SELECT or MENU key to exit out of the menu.

DEFAULT

VALUE

1,000, 5,000, 10,000, 20,000, 30,000 CFM

500, 2,500, 5,000,

10,000, 15,000 l/s

10,000

Page 48

42 Part Two

SUPPLY FLOW MENU

MENU ITEM

SUPPLY AIR DUCT SIZES

SUPPLY FLOW STATION ZERO

FLOW STATION TYPE

SOFTWARE

NAME ITEM DESCRIPTION ITEM RANGE

SP1 DCT AREA

through

SP4 DCT AREA

The SP# DCT AREA item inputs the supply air exhaust duct size. The duct size is needed to compute the supply air flow into the laboratory. This item requires a flow station to be mounted in each supply duct.

If the DIM displays English units, area must be entered in square feet. If metric units are displayed, area must be entered in square meters.

0–10 square feet (0–0.9500 square meters)

The DIM does not compute duct area. The area must be first calculated and then entered into the unit.

SP1 FLO ZERO

through

The SP# FLO ZERO item establishes the flow station zero flow point. A zero or no flow point needs to be established in order to obtain a correct flow measurement output (see

NONE

Calibration section).

SP4 FLO ZERO

All pressure ZERO established on initial set up. Linear

-based flow stations need to have a SP# FLO

flow stations with a

1-5 VDC output also need to have a SP# FLO ZERO established. Linear flow sup stations with a 0-5 VDC output do not need a SP# FLO ZERO.

FLO STA TYPE

The FLO STA TYPE item is used to select the flow station input signal. PRESSURE is selected when TSI flow stations with pressure transducers are installed. LINEAR is selected when a linear output flow station is installed (0-5 VDC):

PRESSURE or LINEAR

Typically a thermal anemometer based flow station.

DEFAULT

VALUE

PRESSURE

Page 49

Technical Section 43

SUPPLY FLOW MENU (continued)

SOFTWARE

MENU ITEM

MAXIMUM FLOW STATION VELOCITY

SUPPLY FLOW LOW CALIBRATION SETTING

SUPPLY FLOW HIGH CALIBRATION SETTING

SUPPLY FLOW LOW CALIBRATION

SUPPLY FLOW HIGH CALIBRATION

NAME ITEM DESCRIPTION ITEM RANGE

TOP VELOCITY

The TOP VELOCITY item is used to input the maximum velocity of a linear must be input for the linear flow station to operate.

SP LOW SETP

SP HIGH SETP

SP1 LOW CAL

through

SP4 LOW CAL

SP1 HIGH CAL

through

SP4 HIGH CAL

flow station output. A TOP VELOCITY

NOTE: This item is disabled if a pressure based flow station

is installed.

The SP LOW SETP menu item sets the supply damper position for supply low flow calibration.

The SP HIGH SETP menu item sets the supply damper position for the supply high flow calibration.

The SP# LOW CAL menu items display the currently measured supply flow rate and the calibrated value for that supply flow. The supply dampers will move to the SP LOW SETP damper position for the low calibration. The calibrated supply flow can be adjusted using the S/T keys to make it match a reference measurement. Pressing the SELECT key will save the new calibration data.

The SP# HIGH CAL menu items display the currently measured supply flow rate and the calibrated value for that supply flow. The supply dampers will move to the SP HIGH SETP damper position for the low calibration. The calibrated supply flow can be adjusted using the S/T keys to make it match a reference measurement. Pressing the SELECT key will save the new calibration data.

0–5,000 FT/MIN

(0–25.4 m/s)

0% Open to 100% Open

DEFAULT

VALUE

0% OPEN

100% OPEN

Page 50

44 Part Two

SUPPLY FLOW MENU (continued)

MENU ITEM

RESET CALIBRATION

END OF

SOFTWARE

NAME ITEM DESCRIPTION ITEM RANGE

RESET CAL

The RESET CAL menu item restores the default calibration for the 4 supply flows. When this menu item is entered, the 8682 will prompt the user to verify that they want to do this by indicating NO. Use the S/T keys change the display to YES, then press the SELECT key to reset the calibrations. Pressing the MENU key before the SELECT key will exit out of the menu item.

The END OF MENU item informs you that the end of a menu has been reached. You can either scroll back up the menu to make changes, or press the SELECT or MENU key to exit out of the menu.

DEFAULT

VALUE

Page 51

Technical Section 45

EXHAUST FLOW MENU

SOFTWARE

MENU ITEM

GENERAL

EXHAUST DUCT

SIZES

EXHAUST FLOW STATION ZERO

FLOW STATION TYPE

NAME ITEM DESCRIPTION ITEM RANGE

EX1 DCT AREA

EX2 DCT AREA

EX1 FLO ZERO

EX2 FLO ZERO

FLO STA TYPE

The EX# DCT AREA item inputs the general exhaust duct size. The duct size is needed to compute the total general exhaust flow out of the laboratory. This item requires a flow station to be mounted in each general exhaust duct.

If the DIM displays English units, area must be entered in square feet. If metric units are displayed area must be entered in square meters.

The EX# FLO ZERO item establishes the flow station zero flow point. A zero or no flow point needs to be established in order to obtain a correct flow measurement output (see

Calibration section).

All pressure ZERO established on initial set up. Linear 1-5 VDC output also need to have an EX# FLO ZERO established. Linear flow stations with a 0-5 VDC output do not need a EX# FLO ZERO.

-based flow stations need to have an EX# FLO

flow stations with a

0–10 square feet

(0–0.9500 square

meters)

The DIM does not

compute duct area. The

area must be first

calculated and then

entered into the unit.

NONE

PRESSURE or LINEAR

DEFAULT

VALUE

PRESSURE

Page 52

46 Part Two

EXHAUST FLOW MENU (continued)

MENU ITEM

MAXIMUM FLOW STATION VELOCITY

EXHAUST FLOW LOW CALIBRATION SETTING

EXHAUST FLOW HIGH CALIBRATION SETTING

EXHAUST FLOW LOW CALIBRATION

EXHAUST FLOW HIGH CALIBRATION

SOFTWARE

NAME ITEM DESCRIPTION ITEM RANGE

TOP VELOCITY

EX LOW SETP

EX HIGH SETP

EX1 LOW CAL

EX2 LOW CAL

EX1 HIGH CAL

EX2 HIGH CAL

The TOP VELOCITY item is used to input the maximum velocity of a linear must be input for the linear flow station to operate.

NOTE: This item is disabled if a pressure based flow station

is installed.

The EX LOW SETP menu item sets the general exhaust damper position for general exhaust low flow calibration.

The EX HIGH SETP menu item sets the general exhaust damper position for the general exhaust high flow calibration.

The EX LOW CAL menu items display the currently measured general exhaust flow rate and the calibrated value for that general exhaust flow. The calibrated general exhaust can be adjusted using the S/T keys to make it match a reference measurement. Pressing the SELECT key will save the new calibration data.

The EX HIGH CAL menu items display the currently measured general exhaust flow rate and the calibrated value for that general exhaust flow. The calibrated general exhaust flow can be adjusted using the S/T keys to make it match a reference measurement. Pressing the SELECT key will save the new calibration data.

flow station output. A TOP VELOCITY

0–5,000 FT/MIN

(0–25.4 m/s)

0% Open to 100% Open

DEFAULT

VALUE

0% OPEN

100% OPEN

Page 53

Technical Section 47

EXHAUST FLOW MENU (continued)

SOFTWARE

MENU ITEM

RESET CALIBRATION

END OF

NAME ITEM DESCRIPTION ITEM RANGE

RESET CAL

The RESET CAL menu item restores the default calibration for the 2 exhaust flows. When this menu item is entered, the 8682 will prompt the user to verify that they want to do this by indicating NO. Use the S/T keys change the display to YES then press the SELECT key to reset the calibrations. Pressing the MENU key before the SELECT key will exit out of the menu item.

The END OF MENU item informs you that the end of a menu has been reached. You can either scroll back up the menu to make changes, or press the SELECT or MENU key to exit out of the menu.

DEFAULT

VALUE

Page 54

48 Part Two

HOOD FLOW MENU

MENU ITEM

FUME HOOD EXHAUST DUCT SIZE

FUME HOOD FLOW STATION ZERO

FLOW STATION TYPE

SOFTWARE

NAME ITEM DESCRIPTION ITEM RANGE

HD1 DCT AREA

through

HD7 DCT AREA

HD1 FLO ZERO

through

The HD# DCT AREA item inputs the fume hood exhaust duct size. The duct size is needed to compute the flow out of the fume hood. This item requires a flow station to be mounted in each fume hood exhaust duct.

If the DIM displays English units, area must be entered in square feet. If metric units are displayed, area must be entered in square meters.

The HD# FLO ZERO item establishes the flow station zero flow point. A zero or no flow point needs to be established in order to obtain a correct flow measurement output (see

0–10 square feet (0–0.9500 square meters)

The DIM does not compute duct area. The area must be first calculated and then entered into the unit.

NONE

Calibration section).

HD7 FLO ZERO

All pressure ZERO established on initial set up. Linear

based flow stations need to have a HD# FLO

flow stations with

a 1-5 VDC output also need to have a HD# FLO ZERO established. Linear flow stations with a 0-5 VDC output do not need a HD# FLO ZERO.

FLO STA TYPE

PRESSURE or LINEAR

Typically a thermal anemometer based flow station.

DEFAULT

VALUE

PRESSURE

Page 55

Technical Section 49

HOOD FLOW MENU (continued)

SOFTWARE

MENU ITEM

MAXIMUM FLOW STATION VELOCITY

NAME ITEM DESCRIPTION ITEM RANGE

TOP VELOCITY

END OF MENU

The TOP VELOCITY item is used to input the maximum velocity of a linear must be input for the linear flow station to operate.

NOTE: This item is disabled if a pressure based flow station

is installed.

The END OF MENU item informs you that the end of a menu has been reached. You can either scroll back up the menu to make changes, or press the SELECT or MENU key to exit out of the menu.

flow station output. A TOP VELOCITY

0–5,000 FT/MIN

(0–25.4 m/s)

DEFAULT

VALUE

Page 56

50 Part Two

HOOD CAL MENU

MENU ITEM

HOOD # LOW CALIBRATION POINTS

HOOD # HIGH CALIBRATION POINTS

MINIMUM HOOD # FLOWS

SOFTWARE

NAME ITEM DESCRIPTION ITEM RANGE

HD1 LOW CAL

through

The HD# LOW CAL menu items display the currently measured fume hood flow rate and the calibrated value for that fume hood flow. The calibrated hood flow can be adjusted using the S/T keys to make it match a reference

HD7 LOW CAL

measurement. Pressing the SELECT key will save the new calibration data.

HD1 HIGH CAL

through

The HD# HIGH CAL menu items display the currently measured fume hood flow rate and the calibrated value for that fume hood flow. The calibrated hood flow can be adjusted using the S/T keys to make it match a reference

HD7 HIGH CAL

measurement. Pressing the SELECT key will save the new calibration data.

MIN HD1 FLOW

through

The MIN HD# FLOW menu items adjust the minimum flow value for each fume hood input. Use this menu item if the fume hood flow measurements are too low when the sash is

0–10,000 CFM

closed.

MIN HD7 FLOW

DEFAULT

VALUE

RESET CALIBRATION

RESET CAL

The RESET CAL menu item restores the default calibration adjustments for the 7 hood flows. When this menu item is entered, the 8682 will prompt the user to verify that they want to do this by indicating NO. Use the S/T keys change the display to YES, then press the SELECT key to reset the calibrations. Pressing the MENU key before the SELECT key will exit out of the menu item.

END OF

The END OF MENU item informs you that the end of a menu has been reached. You can either scroll back up the menu to make changes, or press the SELECT or MENU key to exit out of the menu.

Page 57

Setup / Checkout

The AOC is easy to program and setup. This section covers the theory of operation, required software programming, a programming example, and how to verify (checkout) that the components are functioning correctly. The AOC uses a unique control sequence that combines flow and pressure differential measurements to maintain air balance and laboratory pressure, while interfacing with a temperature sensor to maintain laboratory temperature. The overall AOC control sequence seems quite complicated initially, but the sequence into sub-sequences which simplifies the total system.

Theory of Operation

The AOC control system requires the following measurement inputs to function correctly:

• General exhaust flow(s) measured with a flow station(s) (if general exhaust is installed).

• Fume hood exhaust flow measured with a flow station (total hood(s) flow is required).

• Supply air flow(s) measured with a flow station(s).

• Temperature measured with a thermostat (if temperature is incorporated into sequence).

• Pressure differential with a TSI pressure sensor (if pressure is incorporated into sequence).

Laboratory air balance Laboratory air balance is maintained by measuring the total fume hood exhaust (or other exhaust), subtracting an offset flow from the fume hood total, and then setting the supply air damper(s) to maintain the offset between supply air and fume hood exhaust. The general exhaust damper is normally closed, except when room pressure cannot be maintained. This may occur when the fume hood sashes are all down and the supply air is at a minimum position. The general exhaust damper opens to maintain the required offset and pressure differential.

Pressure control The pressure differential signal is sent to the AOC (assumption: laboratory is under negative pressure). If pressure is at set point, the control algorithm does nothing. If pressure is not at set point, the offset value is changed until pressure is maintained, or the minimum or maximum offset value is reached. If the offset value:

increases, the supply air is reduced until one of three events occur:

• Pressure set point is reached. The AOC maintains the new offset.

• The offset range is exceeded. The offset will be at maximum attempting to reach

pressure set point. An alarm will trigger to inform you pressure differential is not being maintained.

• Supply air minimum is reached. The general exhaust begins to open (was closed) to

maintain pressure differential.

decreases, the supply air increases until one of three events occur:

• Pressure set point is reached. The AOC maintains the new offset.

• The offset range is exceeded. The offset will be at minimum attempting to reach

pressure set point. An alarm will trigger to inform you pressure differential is not being maintained.

• Supply air maximum is reached. The alarm will trigger to inform you pressure

differential is not being maintained.

NOTE: The pressure differential is a slow secondary control loop. The system initially starts

with a calculated offset value and then slowly adjusts the offset value to maintain pressure differential.

Theory of Operation section breaks the

Technical Section

Page 58

Temperature control The Model 8682 receives a temperature input from a temperature sensor (1000 Ω Platinum RTD). The Model 8682 controller maintains temperature control by:

(1) Controlling supply and general exhaust for ventilation and cooling (2) Controlling the reheat coil for heating

The Model 8682 has three supply flow minimum set points. The ventilation set point (VENT MIN SET) is the minimum flow volume required to meet ventilation needs of the laboratory (ACPH). The temperature supply set point (COOLING FLOW) is the theoretical minimum flow required to meet cooling flow needs of the laboratory. The unoccupied set point (UNOCC SETP) is the minimum flow required when the lab is not occupied. All of these set points are configurable. If the Model 8682 is in the Unoccupied Mode, the controller will control the supply air flow to the UNOCCUPY SET ventilation rate, the supply flow will not be modulated for space cooling; space temperature control will be maintained by modulating the reheat coil.

The Model 8682 continuously compares the temperature set point to the actual space temperature.

If set point is being maintained, no changes are made. If set point is not being maintained, and the space temperature is rising, the controller will first modulate the reheat valve closed. Once the reheat valve is fully closed the controller will begin a 3-minute time period. If, after the 3-minute time period the reheat valve is still fully closed, the Model 8682 will then gradually begin increasing the supply volume by 1 CFM/second up to the COOLING FLOW set point.

The controller, when controlling supply flow for cooling, will not increase the supply flow above

the COOLING FLOW ventilation rate. If the space temperature decreases below the set point, the controller will first reduce the supply volume. Once the supply volume reaches its minimum (VENT MIN SET), the controller will then start a 3-minute time period. If, after 3 minutes the supply flow is still at the VENT MIN SET flow rate, the controller will begin modulating the reheat coil open to meet the heating demand.

If the general exhaust is in the closed position and fume hood loads require additional replacement air, the Model 8682 will override ventilation or temperature set points to modulate supply for pressurization control. Temperature will then be controlled by the reheat valve in this sequence.

The control output items in the DIAGNOSTICS menu will show a percentage value. If control direction for a given output is set to DIRECT, the diagnostic value will be percent OPEN. If control direction for a given output is set to REVERSE, the diagnostic value will be percent CLOSED.

NOTE: The greatest flow requirement dominates the supply flow. If hood replacement air

exceeds the ventilation or temperature flow minimums, the replacement air requirement is maintained (minimums are ignored).

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In summary, understanding the AOC control algorithm is the key to getting the system functioning correctly. The AOC control algorithm functions as follows:

SUPPLY AIR =

Supply air is at minimum position; unless additional replacement air is required (fume hood or general exhaust).

GENERAL EXHAUST +

General exhaust is closed or at minimum position; except when supply air is at minimum position and pressure control cannot be maintained.

FUME HOOD EXHAUST - OFFSET

Independent control loop by fume hood controller maintains face velocity. Hood exhaust flow is monitored

by AOC. The AOC does not control the fume hood.

Programmed by user. User programs minimum and maximum offset.

Required Software Programming

The following menu items must be programmed for the AOC to function. See Menu and menu

items section for information in individual menu items.

SUPPLY FLOW MENU

SP1 DCT AREA

through

SP4 DCT AREA. SP1 FLO ZERO

through

SP4 FLO ZERO FLO STA TYPE TOP VELOCITY SP LOW SETP SP HIGH SETP SP1 LOW CAL SP1 HIGH CAL

through

SP4 LOW CAL SP4 HIGH CAL

NOTE: If temperature or pressure control is being maintained by the AOC, the following menu

items must also be programmed:

• Temperature - The temperature cooling and heating values: VENT MIN SET, COOLING FLOW, TEMP SETP.

EXHAUST FLOW MENU

EX1 DCT AREA EX2 DCT AREA. EX1 FLO ZERO EX2 FLO ZERO FLO STA TYPE TOP VELOCITY EX LOW SETP EX HIGH SETP EX1 LOW CAL EX1 HIGH CAL EX2 LOW CAL EX12HIGH CAL

HOOD FLOW MENU & HOOD CAL MENU

HD1 DCT AREA

through

HD7 DCT AREA. HD1 FLO ZERO

through

HD7 FLO ZERO FLO STA TYPE TOP VELOCITY EX1 LOW CAL EX1 HIGH CAL

through

EX7 LOW CAL EX7 HIGH CAL

SET POINT MENU

MIN OFFSET MAX OFFSET

• Pressure - The pressure differential value: SET POINT

There are additional programmable software menu items to tailor the controller to your specific application or increase flexibility. These menu items are not required to be programmed for the AOC to operate.

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Programming Example

The laboratory shown is Figure 7 is being initially setup. The required HVAC information is below the figure.

Figure 7: Laboratory Setup Example

Laboratory design:

Laboratory size = 18’ x 30’ x 10’ (5,400 ft 5 foot fume hood (4) = 250 CFM min* 1,000 CFM max* Flow offset = 300–1000 CFM* Ventilation set point = 900 CFM* (ACPH = 10) Supply Cooling Volume = 1,200 CFM* Pressure differential = -0.001 “ H Temperature set point = 72°F

* Value supplied by laboratory designer.

Room Pressure Control System:

(1) Model 8682 Adaptive Offset Control System mounted in the laboratory. (2) A through-the-wall pressure sensor mounted between the corridor (referenced

space) and laboratory (controlled space).

(3) Damper, pressure dependent VAV box or valve with actuator assembly mounted

in supply air duct(s).

(4) Damper, pressure dependent VAV box or valve with actuator assembly mounted

in exhaust air duct.

(5) Flow station mounted in supply air duct. (Required for non-venturi valve

applications only.)

(6) Flow station mounted in general exhaust air duct. (Required for non-venturi

valve applications only.)

(7) Flow stations mounted in fume hood exhaust duct. (Required for non-venturi

valve applications only.)

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Temperature Control System:

(1) Temperature Sensor (1000 Ω Platinum RTD) mounted in the laboratory. (2) Reheat coil mounted in supply air duct(s).

Fume Hood Control System:

(1) Independent S

UREFLOW VAV Face Velocity Control system.

Based on the preceding information, and knowing duct sizes, the following required menu items can be programmed:

MENU ITEM ITEM VALUE DESCRIPTION

HD1 DCT AREA 0.78 ft HD2 DCT AREA 0.78 ft HD3 DCT AREA 0.78 ft HD4 DCT AREA 0.78 ft EX1 DCT AREA 1.0 ft SP1 DCT AREA 3.33 ft

(12 in. round) Fume hood 1 duct area

(12 in. round) Fume hood 2 duct area

(12 in. round) Fume hood 3 duct area

(12 in. round) Fume hood 4 duct area

(12” × 12”) General exhaust duct area

(24” × 20”) Supply duct area

MIN OFFSET 300 CFM Minimum offset. MAX OFFSET 1,000 CFM Maximum offset. EXH CONFIG UNGANGED (Default value)

Additional menu items to program for temperature and pressure control

VENT MIN SET 900 CFM 10 air changes per hour COOLING FLOW 1,200 CFM Required flow to cool laboratory.

TEMP SETP 72°F Temperature sensor switches from VENT MIN SET

to COOLING FLOW.

SET POINT –0.001 in. H

O Pressure differential set point.

Sequence Of Operation

Beginning scenario: Laboratory is maintaining pressure control; -0.001 “ H Temperature requirement is satisfied. Fume hood sashes are down, total hood exhaust is 1,000 CFM. Supply air is 900 CFM (maintain ventilation). General exhaust 200 CFM (calculated from below).

Fume hoods + General exhaust - Offset = Supply air 1,000 + ? – 300 = 900

Two fume hoods are opened so that the chemists can load experiments into the hood. The face velocity (100 ft/min) is maintained by modulating the fume hood dampers. The total fume hood flow is now 2,500 CFM (1,000 + 1,000 + 250 + 250).

Fume hoods + General exhaust - Offset = Supply air 2,500 + 0 – 300 = 2,200

The supply air volume changes to 2,200 CFM (2,500 CFM hood exhaust –300 CFM offset). The general exhaust is closed since no additional exhaust is needed for temperature or ventilation.

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However, the Digital Interface Module indicates the laboratory is now –0.0002 in. H

O (not

negative enough). The AOC algorithm slowly changes the offset until pressure control is maintained. In this case the offset changes to 400 CFM, which decreases the supply volume by 100 CFM. The additional offset maintains the pressure differential at –0.001 in. H

O (set point).

Fume hoods + General exhaust - Offset = Supply air 2,500 + 0 – 400 = 2,100

The hoods are shut after the experiments are loaded so the initial conditions prevail.

Fume hoods + General exhaust - Offset = Supply air 1,000 + 200 – 300 = 900

An oven is turned on and the laboratory is getting warm. The temperature sensor sends the AOC a signal to switch to temperature minimum ventilation (COOLING FLOW). This increases the supply air to 1,200 CFM. The general exhaust air must also increase (damper opens) to maintain flow balance.

Fume hoods + General exhaust - Offset = Supply air 1,000 + 500 – 300 = 1,200

Three fume hoods are opened so the fume hood flow is now 3,250 CFM. In order to maintain air balance the general exhaust and supply air change to:

Fume hoods + General exhaust - Offset = Supply air 3,250 + 0 – 300 = 2,950

The control loop continuously keeps the room balance, room pressure, and temperature control satisfied.

Checkout

The AOC controller should have the individual components checked prior to attempting control of the laboratory. The checkout procedure outlined below will confirm all hardware is performing correctly. The checkout procedure is not difficult and will catch any hardware problems. The steps are as follows:

Confirm wiring is correct. The most common problem with installed hardware equipment is incorrect wiring. This problem usually exists on initial installation, or when modifications to the system takes place. The wiring should be very closely checked to verify it exactly matches the wiring diagram. Polarity must be observed for system to operate correctly. The TSI provided cables are all color coded to ensure proper wiring. A wiring diagram is located in Appendix C of this manual. Wiring associated with non TSI components should be closely checked for correct installation.

Confirming physical installation is correct All of the hardware components need to be installed properly. Review the installation instructions and verify components are installed properly at the correct location. This can be easily confirmed when checking the wiring.

Verifying individual components Verifying all TSI components are operating correctly requires following a simple procedure. The fastest procedure involves first checking the DIM and then confirming all component parts are functioning.

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NOTE: These checks require power to the AOC and all components.

CHECK - DIM

Press TEST key to verify Digital Interface Module (DIM) electronics are functioning correctly. At the end of the self test, the display will show SELF TEST - PASSED if DIM electronics are good. If unit displays DATA ERROR at the end of the test, the electronics may be corrupted. Check all software items to determine cause of DATA ERROR.

If SELF TEST - PASSED was displayed proceed to check individual components. Enter Diagnostics and Flow Check Menu to check the following:

Control output - supply (if controlling supply air). Control output - exhaust (if controlling exhaust air). Sensor input (if pressure sensor is installed). Sensor status (if pressure sensor installed).

Temperature input. General exhaust flow station(s). Supply flow station(s). Fume hood flow station(s).

The menu items are explained in detail in the

Menu and Menu Items section of the manual,

so their function is not reviewed here. If the AOC system passes each of the checks, the mechanical piece parts are all functioning correctly.

CHECK - Control output - supply

Enter CONTROL SUP menu item in diagnostics menu. A number between 0 and 100% will be displayed. Press the S/T keys until either 0 or 100% shows on the display. Note the position of the supply air control damper. If display reads 0%, press the S key until 100% is shown on display. If display reads 100%, press T key until 0% is shown on display. Note the position of the supply air damper. The damper should have rotated either 45 or 90 degrees depending on actuator installed.

CHECK - Control output - exhaust

Enter CONTROL EXH menu item in diagnostics menu. A number between 0 and 100% will be displayed. Press the S/T keys until either 0 or 100% shows on the display. Note the position of the general exhaust control damper. If display reads 0%, press the S key until 100% is shown on display. If display reads 100%, press T key until 0% is shown on display. Note the position of the general exhaust damper. The damper should have rotated either 45 or 90 degrees depending on actuator installed.

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CHECK - Sensor input

Enter SENSOR INPUT menu item in diagnostics menu. A voltage between 0 and 10 volts DC will be displayed. It is not important what the exact voltage is to pass this test. Tape over the pressure sensor (slide pressure sensor door open) and voltage should read approximately 5 volts (zero pressure). Remove tape and blow on sensor. Displayed value should change. If voltage changes, the sensor is functioning correctly. If voltage does not change, proceed to CHECK - Sensor status.

CHECK - Sensor status

Enter SENSOR STAT menu item in diagnostics menu. If NORMAL is displayed, the unit passes test. If an error message is displayed, go to diagnostics menu section of the manual, SENSOR STAT menu item for explanation of error message.

CHECK – Temperature sensor input

Enter TEMP INPUT menu item in diagnostics menu. A temperature value will be displayed. The exact temperature displayed is not important as long as the temperature changes when space temperature changes.

CHECK - Flow station

The Flow Check menu lists all the flow stations that can be installed. Check each flow station menu item that has a flow station attached. Enter ___ FLOW IN menu item and the actual flow will be displayed. If the flow is correct, no changes need to be made. If flow is incorrect, recalibrate until actual flow matches flow station reading.

If unit passed all checks, the mechanical components are physically working.

Calibration

The calibration section explains how to calibrate and set the elevation for the AOC pressure sensor and how to calibrate a flow station.

NOTE: The pressure sensor is factory calibrated and normally does not need to be adjusted.

However, inaccurate readings may be detected if pressure sensor is not installed correctly, or problems with the sensor exists. Before calibrating, check that the sensor is installed correctly (usually only a problem on initial set up). In addition, go into DIAGNOSTICS menu, SENSOR STAT item. If NORMAL is displayed, calibration can be adjusted. If an error code is displayed, eliminate error code and then verify pressure sensor needs adjustment.

Adjusting the S convection currents, HVAC configuration, or equipment used to make the measurement. TSI recommends always taking the comparison measurement in the exact same location (i.e., under the door, middle of door, edge of door, etc.). A thermal air velocity meter is needed to make the comparison measurement. Normally the velocity is checked at the crack under the doorway, or the door is opened 1” to allow alignment of the air velocity probe making the measurement. If the crack under the door is not large enough, use the 1” open door technique.

All pressure transducer based flow stations and 1–5 VDC linear flow stations must be zeroed upon initial system set up. Linear 0–10 VDC flow stations do not require a zero flow to be established.

UREFLOW pressure sensor calibration may be required to eliminate errors due to

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Calibrating Pressure Sensor

Enter calibration menu (see

Software Programming if not familiar with keystroke procedure).

Access code is turned on so enter access code. All menu items described below are found in CALIBRATION menu.

Elevation

The ELEVATION item eliminates pressure sensor error due to elevation of building. (See ELEVATION item in Enter the ELEVATION menu item. Scroll through the elevation list and select the one closest to the building’s elevation. Press the SELECT key to save the data and exit back to the calibration menu.

Sensor span

WARNING: The span can only be adjusted in the same pressure direction.

Perform a smoke test to determine pressure direction.

Menu and Menu items section for further information).

Figure 8: Pressure Sensor Door Slid Open

Adjusting span cannot cross zero pressure. Example: If unit displays +0.0001 and actual pressure is -0.0001, do not make any adjustments. Manually change the air balance, close or open dampers, or open door slightly to get both unit and actual pressure to read in same direction (both read positive or negative). This problem can only occur at very low pressures so slightly changing the balance should eliminate the problem.

Select SENSOR SPAN item.

Position thermal air velocity meter in door opening to obtain velocity reading. Press S/T keys until pressure direction (±) and sensor span match thermal air velocity meter and smoke test.

Press SELECT key to save sensor span.

Exit menu, calibration is complete.

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Flow Station Pressure Transducer Zero

NOTE: Not required for linear flow stations with 0-10 VDC output.

Pressure based flow station

Disconnect tubing between pressure transducer and flow station.

Enter menu that corresponds to flow station: Supply Flow, Exhaust Flow, or Hood Flow.

Select SP# FLO ZERO to take a supply flow station zero. or Select EX# FLO ZERO to take a general exhaust flow station zero. or Select HD# FLO ZERO to take a fume hood flow station zero.

Press SELECT key. Flow zero procedure, which takes 10 seconds, is automatic.

Press SELECT key to save data.

Connect tubing between pressure transducer and flow station.

NOTE: #; insert number of flow station you are performing a zero on.

Linear flow station 1-5 VDC output Remove flow station from duct, or cutoff flow in duct. Flow station must have no flow

going past the sensor.

Enter menu that corresponds to flow station location: Supply Flow, Exhaust Flow, or Hood Flow.

Select SP# FLO ZERO to take a supply flow station zero. or Select EX# FLO ZERO to take a general exhaust flow station zero. or Select HD# FLO ZERO to take a fume hood flow station zero.

Press SELECT key. Flow zero procedure, which takes 10 seconds, is automatic.

Press SELECT key to save data.

Install flow station back in duct.

NOTE: #; insert number of flow station you are performing a zero on.

2-Point Flow Calibration

Supply and General Exhaust Flow Calibration:

Enter menu that corresponds to flow calibration: Supply Flow, Exhaust Flow.

Select SP LOW SETP to enter a supply flow low calibration set point. or Select EX LOW SETP to enter a general exhaust flow low calibration set point.

The DIM will display a value between 0% OPEN and 100% OPEN. Press the S or T keys to adjust the value displayed (and the damper position). Using a voltmeter, read the input voltage from the appropriate pressure transducer. When the voltmeter reading is approximately 20% of the full flow reading (100% OPEN) press the SELECT key to save the data.

then

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Select SP HIGH SETP to enter a supply flow low calibration set point. or Select EX HIGH SETP to enter a general exhaust flow low calibration set point.

The DIM will display a value between 0% OPEN and 100% OPEN. Press the S or T keys to adjust the value displayed (and the damper position). Using a voltmeter, read the input voltage from the appropriate pressure transducer. When the voltmeter reading is approximately 80% of the full flow reading (100% OPEN) press the SELECT key to save the data.

then

Select SP# LOW CAL to enter a supply flow low calibration value. or Select EX# LOW CAL to enter a general exhaust flow low calibration value.

The DIM will display two airflow values. Press the S or T keys to adjust the value displayed on the right to match the actual measured airflow, which is obtained with a duct traverse measurement or with a capture hood measurement.

Press SELECT key to save data.

then

Select SP# HIGH CAL to enter a supply flow high calibration value. or Select EX# HIGH CAL to enter a general exhaust flow high calibration value.

Press SELECT key to save data.

Hood Flow Calibration

Enter HOOD CAL menu. Raise the fume hood sash, of a previously calibrated fume hood, from fully closed to an approximate height of 12”. Select the corresponding HD# LOW CAL menu item.

The DIM will display two airflow values. Press the S or T keys to adjust the value displayed on the right to match the actual airflow, which is obtained with a duct traverse measurement or by calculating the volumetric flow. Calculated volumetric flow can be determined by multiplying on the current sash open area by the displayed face velocity.

Press SELECT key to save data.

then

Raise the fume hood sash above the low flow calibration, or to its sash stop (approximately 18”). Select the corresponding HD# HIGH CAL menu item.

Press SELECT key to save data.

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NOTE: Insert number of flow calibration you are performing.

A low flow calibration must be performed before its associated high flow calibration is performed. For example, in a laboratory that has two separate supply flows, SP1 LOW CAL must be completed before SP1 HIGH CAL. SP2 LOW CAL must be completed before SP2 HIGH CAL.

It is acceptable to complete all low flow calibrations before completing their associated high flow calibrations. To continue with the previous example: SP1 LOW CAL and SP2 LOW CAL could both be completed before completing SP1 HIGH CAL and SP2 HIGH CAL.

Fume hood face velocity calibration must be completed before beginning fume hood flow calibration.

Maintenance and Repair Parts

The Model 8682 S inspection of system components as well as an occasional pressure sensor cleaning are all that are needed to insure that the Model 8682 is operating properly.

System Component Inspection

It is recommended that the pressure sensor be periodically inspected for accumulation of contaminants. The frequency of these inspections is dependent upon the quality of the air being drawn across the sensor. Quite simply, if the air is dirty, the sensors will require more frequent inspection and cleaning.

Visually inspect the pressure sensor by sliding open the sensor housing door (Figure 9). The air flow orifice should be free of obstructions. The small ceramic coated sensors protruding from the orifice wall should be white and free of accumulated debris.

UREFLOW Room Pressure Controller requires minimal maintenance. Periodic

Figure 9: Pressure Sensor Door Slid Open

Periodically inspect the other system components for proper performance and physical signs of excessive wear.

Pressure Sensor Cleaning

Accumulations of dust or dirt can be removed with a dry soft-bristled brush (such as an artist's brush). If necessary, water, alcohol, acetone, or trichlorethane may be used as a solvent to remove other contaminants.

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Use extreme care when cleaning the velocity sensors. The ceramic sensor may break if excessive pressure is applied, if sensor is scraped to remove contaminants, or if the cleaning apparatus abruptly impacts the sensor.

WARNING: If you are using a liquid to clean the sensor, turn off power to the Model

8682.

Do not use compressed air to clean the velocity sensors.

Do not attempt to scrape contaminants from the velocity sensors. The

velocity sensors are quite durable; however, scraping may cause mechanical damage and possibly break the sensor. Mechanical damage due to scraping voids the pressure sensor warranty.

Flow Station Inspection/Cleaning

The flow station can be inspected by removing mounting screws and visually examining probe. Pressure based flow stations can be cleaned by blowing compressed air into the low and high pressure taps (flow station does not need to be removed from duct). Linear flow stations (thermal anemometer type) can be cleaned with a dry soft-bristled brush (such as an artist's brush). If necessary, water, alcohol, acetone, or trichlorethane may be used as a solvent to remove other contaminants.

Replacement Parts

All components of the room pressure controller are field replaceable. Contact TSI HVAC Control Products at (800) 874-2811 (U.S. and Canada) or (001 651) 490-2811 (other countries) or your nearest TSI Manufacturer's Representative for replacement part pricing and delivery.

Part Number Description

800235 Adaptive Offset Controller

800259 Adaptive Offset Controller w/LON

868271 Adaptive Offset Controller w/BACnet

800228 Digital Interface Module

868270 Digital Interface Module (8682-BAC

only)

800326 Pressure Sensor w/ Cable

800248 Sensor Cable

800416 DIM Comm Cable

800414 Transformer Cable

800420 Transformer

800199 Controller Output Cable

800360 Electric Actuator

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Troubleshooting Section

UREFLOW Room Pressure Controller is designed to be trouble free. However, installation

The S problems or interaction with other HVAC components may cause system problems. The

UREFLOW system is easy to troubleshoot if an organized approach to evaluate the system is

S taken. Troubleshooting is broken down into hardware and software problems. Hardware problems deal with the physical installation of the device. Hardware problems include wiring problems, incorrectly installed equipment, and add-ons or non-TSI equipment. Software problems include control problems, configuration problems, or interaction problems with the HVAC system.

The hardware test described in this section determines that all TSI mechanical components are functioning correctly. The hardware test requires the diagnostics menu items to be accessed. If you are unfamiliar with the S procedure. Troubleshooting the majority of problems is usually quick if the hardware test is followed.

Software and hardware problems are covered in the troubleshooting chart. Pick the problem that most closely resembles your problem and review the possible symptoms and corrective action. Software or system performance problems can and are affected by the supply air system, exhaust air system, or physical configuration of the room. Separating TSI system problems from the HVAC system can sometimes be difficult. TSI recommends confirming all hardware is operating correctly before troubleshooting software problems.

Hardware Test

Three tests need to be performed in order to determine all hardware is functioning correctly. The test are broken down into:

• Confirming wiring is correct.

• Confirming physical installation is correct.

• Verifying mechanical components.

Confirming wiring is correct The most common problem with installed hardware equipment is incorrect wiring. This problem usually exists on initial installation, or when modifications to the system take place. The wiring should be very closely checked to verify it exactly matches the wiring diagram. The TSI cables are all color coded to ensure proper wiring. A wiring diagram is located in Appendix C of this manual. Wiring associated with non TSI components should be closely checked for correct installation. If non TSI components are installed, consider disconnecting them for testing purposes.

Verifying mechanical components Verifying all TSI components are operating correctly requires following a simple procedure. The fastest procedure to confirm all equipment is operating is to first test the DIM, and then go into the diagnostic menu to test each component.

NOTE: These tests require power to the units, so if unit has no power, refer to hardware

troubleshooting chart to eliminate power problem.

UREFLOW menus, see Software Programming for keystroke

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TEST - DIM

Press TEST key to verify Digital Interface Module (DIM) electronics are functioning correctly. At the end of the self test, the display will show SELF TEST - PASSED if all DIM electronics are good. If unit displays DATA ERROR at the end of the test, the electronics may be corrupted. Check all software items to determine cause of DATA ERROR.

If SELF TEST - PASSED is displayed proceed to test individual components. Enter Diagnostics Menu and check the following:

Control output - supply. Control output - exhaust. Control output - temperature. Sensor input. Sensor status.

Temperature input.

NOTE: Skip any test that does not have option installed.

These diagnostic menu items are explained in detail in the next section ( of the manual, so their function is not reviewed here. If the S

UREFLOW system passes each

Diagnostics Menu)

of the tests, the mechanical piece parts are all functioning correctly.

TEST - Control output - supply

Enter CONTROL SUP menu item in diagnostics menu. A number between 0% OPEN and 100% OPEN will be displayed. Press the S/T keys until either 0% OPEN or 100% OPEN shows on the display. Note the position of the supply air control damper. If display reads 0% OPEN, press the S key until 100% OPEN is shown on display. If display read 100% OPEN press T key until 0% OPEN is shown on display. Note the position of the supply air damper. The damper should have rotated either 45 or 90 degrees depending on actuator installed. If not, see the hardware section Control system is not controlling.

TEST - Control output - exhaust

Enter CONTROL EXH menu item in diagnostics menu. A number between 0% OPEN and 100% OPEN will be displayed. Press the S/T keys until either 0% OPEN or 100% OPEN shows on the display. Note the position of the general exhaust control damper. If display reads, 0% OPEN press the S key until 100% OPEN is shown on display. If display read 100% OPEN press T key until 0% OPEN is shown on display. Note the position of the general exhaust damper. The damper should have rotated either 45 or 90 degrees depending on actuator installed. If not, see the hardware section Control system is not controlling.

TEST - Control output - temperature

Enter CONTROL TEMP menu item in diagnostics menu. A number between 0% OPEN and 100% OPEN will be displayed. Press the S/T keys until either 0% OPEN or 100% OPEN shows on the display. Note the position of the reheat valve. If display reads 0% OPEN, press the S key until 100% OPEN is shown on display. If display read 100% OPEN press T key until 0% OPEN is shown on display. Note the position of the reheat valve. The damper should have moved through its full stroke. If not, see hardware section Control system is not controlling. Reheat valves typically move slowly, so you may have to wait to see the full motion.

TEST - Sensor input

Enter SENSOR INPUT menu item in diagnostics menu. A voltage between 0 and 10 volts DC will be displayed. It is not important what the exact voltage is to pass this test. Tape

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over the pressure sensor (slide pressure sensor door open) and voltage should read approximately 5 volts (zero pressure). Remove tape and blow on sensor. Displayed value should change. If voltage changes, the unit passes. If voltage doesn’t change, proceed to TEST - Sensor status.

TEST - Sensor status

TEST - Temp input

Enter TEMP INPUT menu item in diagnostics menu. A temperature will be displayed. The exact temperature displayed is not important as long as the temperature changes when the RTD signal changes.

If unit passed all tests, the mechanical components are physically working. If problems still exist, go to troubleshooting chart for additional information, on both hardware and software symptoms.

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Troubleshooting Chart

Symptom Possible Cause Corrective Action

Display is blank. Fuse is blown.

No power to DIM.

DIM is defective.

Measure voltage at pins 33 and 34 on AOC. The voltage should nominally be 24–30 VAC.

If correct voltage is measured, internal DIM fuse is probably blown. Unplug 14-pin connector from DIM for 2 minutes. The internal fuse will automatically reset. Plug unit back in and check display. If display is still blank, check all wiring, etc. If no problems are found, replace DIM.

If zero volts are measured, see No power to DIM.

Verify circuit breaker is on. Verify transformer primary measures 110 VAC. Verify transformer secondary measures 24–30 VAC. Verify electric AOC panel is receiving 24–30 volts between pins 33 and 34.

If proper voltage is found between pins 1 and 2 of the DIM, all wiring has been checked, fuses have been reset, and screen is still blank, the DIM is probably defective. Replace DIM.

Control system is not controlling.

Incorrect wiring.

Supply and exhaust control wiring reversed.

Verify correct wiring (see wiring diagram, AOC must be wired exactly as shown.

Verify supply control wiring (pins 44 and 45) goes to supply damper and exhaust control wiring (pins 46 and 47) goes to general exhaust damper.

Appendix C). DIM and

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Symptom Possible Cause Corrective Action

Control system is not controlling.

(continued)

No control output signal.

Bad actuator or E/P (damper doesn't move).

Defective variable frequency drive (VFD).

Damper rotating opposite direction.

Go into DIAGNOSTICS menu, CONTROL SUP or CONTROL EXH item. A number between 0% OPEN and 100% OPEN will be

displayed. Pressing the S key increases the number. Pressing the T key decreases the number. To check the supply control output, measure the DC voltage between pins 44 and 45 on the AOC panel. To check the general exhaust control output, measure the DC voltage between pins 46 and 47 on the AOC panel. Change the CONTROL value about 40%. The voltage output should change approximately 4 volts. Change the CONTROL value to 59% OPEN. The voltage should read approximately 5 VDC.

If no change occurs, disconnect control wires on pins 44 and 45 (or 46 and 47) and repeat test. If AOC panel still fails to change voltage output, AOC panel is probably defective.

Go into DIAGNOSTICS menu, CONTROL SUP or CONTROL EXH item. A number between 0% OPEN and 100% OPEN will be

displayed. Pressing the S key increases the number. Pressing the T key decreases the number. Change the CONTROL value to read 0% OPEN or 100% OPEN. Note damper position. Press an arrow key to change 0% OPEN to 100% OPEN or 100% OPEN to 0% OPEN. Note position of damper. Damper should have rotated 45 or 90 degrees depending on actuator system installed.

If damper rotated 45 or 90 degrees, actuator is installed and operating correctly. If damper did not rotate, check that:

• Jumper is installed correctly on actuator or E/P (Appendix C).

• Damper is not physically stuck (screws, etc.).

• Wiring is correct between actuators and controller. Check that

voltage varies between 0 and 10 volts on pins 6 and 7 on electric actuator or E/P (see No control output signal).

• Electric actuator is not over torqued. The electric actuator has

current limiting protection. If damper is physically stuck or actuator is over current, the actuator will shut down. To restart either kill power to actuator or move damper in opposite direction it was trying to rotate (CONTROL SUP or CONTROL EXH menu item).

Perform test described in Control system is not controlling. If

CONTROL OUT is functioning, verify wiring to VFD by confirming CONTROL OUT voltage changes at VFD. If voltage changes, a

problem with VFD exists. See VFD manual for further troubleshooting.

If damper is full open when it should be closed or full closed when it should be open, go into CONTROL menu CONTROL SIG menu item. Change direct to reverse or reverse to direct to change control output direction. The control sig changes the direction of both the supply and exhaust damper. If only 1 damper rotates incorrectly, change the jumper on the E/P or electric actuator.

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Symptom Possible Cause Corrective Action

Control system is not controlling (continued)

Damper is full open or full closed, won’t move.

Actuator jumper is missing or loose. Verify jumper is installed correctly.

Control wires are loose. Check wires and verify control output is working (see no control output signal). If control output test passes, verify damper is rotating correct direction (see damper rotating opposite direction). If damper is rotating correctly and set point cannot be reached, DIM will fully rotate damper to get as close to set point as possible. Air balance needs to be adjusted.

Sensor does not calibrate.

Sensor communications not working.

Check SENSOR STAT item in diagnostics menu. If NORMAL is displayed, sensor is okay, if COMM ERROR is displayed, check wiring, pressure sensor address, and that DIP switch 1 & 2 are ON (Figure 10).

Figure 10: Pressure Sensor DIP Switch

Incorrect pressure

sensor address.

Pressure sensor must have address of 1. Check pressure sensor DIP switches 5 & 6 and verify address 1 is correct (7-12 must be OFF).

Pressure sensor red LED is blinking (Figure 8).

Problem with sensor (slow uniform blink).

Communication (fast burst of non-uniform blinking).

Red LED is constantly on.

Check SENSOR STAT and confirm NORMAL is displayed. If ERROR is displayed, correct error.

Unit is communicating with DIM. This is normal.

This is normal when no problems exist or when no communication is occurring.

Technical Section 69

Page 76

Symptom Possible Cause Corrective Action

DIM always displays 0.200 inches H

Incorrect pressure sensor output.

Pressure sensor must be set for 0-10 volt output, not 4–20 mA. Check pressure sensor DIP switch 3 and make sure it is OFF (see Figure 10).

DIM does not respond to RS-485 communications.

DIM displays opposite pressure signal.

Network protocol is incorrect.

Incorrect network address.

Incompatible software.

Sensor direction is incorrect.

Go into INTERFACE menu, NET PROTOCOL item. The protocol must match host system. Select correct interface.

The network address at the building automation system and at the DIM must match. The network address must be unique for each DIM.

Data sent to DIM may be in form that the S recognize.

Pressure sensor must have DIP switch correctly set for proper sign display. Verify DIP switch 4 is ON when sensor is mounted in the laboratory (controlled space), and OFF when sensor is mounted in corridor (reference space). See Figure 8.

Alarm relays don't work.

Alarms are turned off.

Incorrect wiring.

Relay may be defective.

Press TEST key. The individual alarm set points will display. If all alarm set points are zero, alarm relay is not active, so relay will not be required to change state.

Check the wiring from S connected to the relays.

Disconnect the DIM wiring from relay contact pins 13 and 14 for low alarm relay and pins 25 and 26 for high alarm relay. Go into DIAGNOSTICS menu, LOW ALM REL or HIGH ALM REL. Connect an ohmmeter to relay terminals to verify contact open and closes. Press the S/T keys to manually trip the relay. If relay responds (contact opens and closes), the device connected is incompatible or defective. If relay doesn’t respond, relay is defective (may be caused by incompatible device). Replace DIM.

"DATA ERROR" flashing on display.

Actuator hunting. Display indicates steady pressure.

DIM was hit by electrical disturbance. Control system is unstable.

All data may be lost or changed. Review all configuration parameters. DATA ERROR is removed by pressing the RESET key.

Go into CONTROL menu, SPEED item. Turn speed down until hunting is eliminated. If speed is too slow review CONTROL menu items and adjust accordingly to eliminate hunting.

UREFLOW controller cannot

UREFLOW relay's output to the device that is

70 Part Two

Page 77

Symptom Possible Cause Corrective Action

Displayed pressure wildly fluctuating.

Control system is unstable.

Exhaust system unstable.

Supply or exhaust air is affecting the sensor.

Go into CONTROL menu SPEED item, turn speed down until fluctuation is eliminated. If speed is too slow, review CONTROL menu items and adjust accordingly until performance is adequate.

Turn DIM to emergency. If pressure stabilizes, this is not the problem. Verify reference pressure is not fluctuating.

Check location of supply air diffusers and exhaust grilles. They should be as far from pressure sensor as is realistic, 6 feet preferred, 2-1/2 feet minimum. Supply diffuser terminal throw velocity must be less than 10 ft/min at the sensor. Relocate supply or exhaust as needed.

Temperature not controlling

Incorrect wiring. Verify correct wiring (see wiring diagram, Appendix C). DIM and

AOC panel must be wired exactly as shown.

No control output

signal.

Go into DIAGNOSTICS menu, CONTROL SUP or CONTROL EXH item. A number between 0% OPEN and 100% OPEN will be

displayed. Pressing the S key increases the number. Pressing the T key decreases the number. Measure the DC voltage between pins 44 and 45 (46 and 47 for exhaust) on the AOC panel. Change the CONTROL value about 40%. The voltage output should change approximately 4 volts. Change the CONTROL value to 60% OPEN. The voltage should read approximately 5 VDC.

If no change occurs, disconnect control wires on pins 25 and 26 and repeat test. If DIM still fails to change voltage output, DIM is probably defective.

Bad actuator

(valve doesn't move).

Go into DIAGNOSTICS menu, CONTROL TEMP. A number between 0% OPEN and 100% OPEN will be displayed. Pressing the

S key increases the number. Pressing the T key decreases the number. Change the CONTROL value to read 0% OPEN or 100% OPEN. Note valve position. Press an arrow key to change 0% OPEN to 100% OPEN or 100% OPEN to 0% OPEN. Note position of valve. Valve should have moved full stroke.

Valve rotating

opposite direction.

If Valve is full open when it should be closed or full closed when it should be open, go into CONTROL menu TEMP CONTROL menu item. Change direct to reverse or reverse to direct to change control output direction.

Technical Section 71

Page 78

Page 79

Appendix A

Specifications

Dim and AOC Module

Display

Range .......................................................................... -0.20000 to +0.20000 inches H

Accuracy ..................................................................... ±10% of reading, ±0.00001 inches H

Resolution ................................................................... 5% of reading

Display Update............................................................0.5 sec

Inputs/Outputs See Wiring Information Appendix C for type.

Switch in...................................................................... SPST (N.O.) Switch. Closing switch initiates

Unoccupied Switch in .................................................SPST (N.O.) Switch. Closing switch initiates

Remote Switch in ........................................................ SPST (N.O.) Switch. Closing switch initiates

Flow in .......................................................................0–10 VDC

Temperature In ............................................................ 1000Ω platinum RTD

(TC: 385 Ω/100°C)

Outputs

Supply Control ............................................................ 0–10 VDC

Exhaust Control........................................................... 0–10 VDC

Reheat Control ............................................................ 0–10 VDC or 4–20 mA

Low Alarm Range ....................................................... -0.19500 to +0.19500 inches H

High Alarm Range ......................................................-0.19500 to +0.19500 inches H

Alarm Contacts............................................................ SPST (N.O.)

Analog Outputs ...........................................................0–10 VDC

RS-485 ........................................................................ Modbus RTU or N2 standard

LON ............................................................................ Optional

BACnet MSTP ............................................................ Model 8682-BAC only

General

Operating Temperature ...............................................32 to 120°F

Internal Scan Rate .......................................................50 msec

Input Power (including sensor) ................................... 24 VAC, 10 watts max @ 50 or 60 Hz

Dim Dimensions.......................................................... 4.9 in. × 4.9 in. × 1.35 in.

AOC Dimensions ........................................................ 12 in. × 16 in. × 4 in.

Dim Weight.................................................................0.7 lb.

AOC Weight................................................................ 1.8 lbs

condition.

Max current 2A Max voltage 220 VDC Maximum power 60 W Contacts close in alarm condition

Page 80

Pressure Sensor

Temperature Compensation Range ............................. 55 to 95°F

Power Dissipation .......................................................0.16 watts at 0 inches H

Dimensions (DxH) ...................................................... 5.58 in. × 3.34 in. × 1.94 in.

Weight......................................................................... 0.2 lb.

Damper/Actuator

Types of Actuator........................................................ Electric

Input Power ................................................................. Electric: 24 VAC, 7.5 watts max.

Control Signal Input ................................................... 0 volts damper closed

Time for 90° Rotation .................................................Electric: 1.5 seconds

0.20 watts at 0.00088 inches H

10 volts damper open

74 Appendix A

Page 81

Appendix B

Network Communications

Network communications are available on the Model 8682. The Model 8682 can communicate with a building management system through Modbus, N2 or LonWorks protocols. The Model 8682-BAC can communicate with a building management system through BACnet MSTP protocol. Please refer to the appropriate section below for more detailed information.

Modbus Communications

Modbus communications are installed in the Model 8682 adaptive offset room pressure controllers. This document provides the technical information needed to communicate between the host DDC system and the Model 8682 units. This document assumes the programmer is familiar with Modbus protocol. Further technical assistance is available from TSI if your question is related to TSI interfacing to a DDC system. If you need further information regarding Modbus programming in general, please contact:

Modicon Incorporated (a division of Schneider-Electric) One High Street North Andover, MA 01845 Phone (800) 468-5342

The Modbus protocol utilizes the RTU format for data transfer and Error Checking. Check the Modicon Modbus Protocol Reference Guide (PI-Mbus-300) for more information on CRC generation and message structures.

The messages are sent at 9600 baud with 1 start bit, 8 data bits, and 2 stop bits. Do not use the parity bit. The system is set up as a master slave network. The TSI units act as slaves and respond to messages when their correct address is polled.

Blocks of data can be written or read from each device. Using a block format will speed up the time for the data transfer. The size of the blocks is limited to 20 bytes. This means the maximum message length that can be transferred is 20 bytes. The typical response time of the device is around 0.05 seconds with a maximum of 0.1 seconds.

Unique to TSI The list of variable addresses shown below skips some numbers in the sequence due to internal Model 8682 functions. This information is not useful to the DDC system and is therefore deleted. Skipping numbers in the sequence will not cause any communication problems.

All variables are outputted in English units: ft/min, CFM, or inches H alarms are stored in ft/min. The DDC system must convert the value to inches of water if that is desired. The equation is given below.

Pressure in Inches H

Modbus Variables These variables can be read Modbus command 16 Preset Multiple Regs. Many of these variables are the same “menu items” that are configured from the S This is for safety reasons, since each room is individually setup for maximum performance.

UREFLOW keypad. The calibration and control items are not accessible from the DDC system.

O = 6.2*10-8*(Velocity in ft/min / .836)2

using Modbus command 03 Read Holding Registers. They can be written to using

0. The room pressure control set points and

Page 82

8682 Modbus Variable List

Variable Name

Variable Address Input Provided to Master System

Integer DDC system receives

Software Version 0 Current Software Version 1.00 = 100 Controller Type 1 Controller Model Number 8682

Emergency Mode 2 Emergency Mode Control

Control Mode 3 Control mode of device.

0 Leave emergency mode 1 Enter emergency mode 0 Normal 1 Unoccupied (Setback)

Status Index 4 Status of SUREFLOW device 0 Normal

1 Dim Data Error 2 Alarm = Low Pressure 3 Alarm = High Pressure 4 Alarm = Min Supply 5 Alarm = Max Exhaust 6 Data Error 7 Cal Error 8 Emergency Mode

Room Velocity 5 Velocity of room pressure Displayed in ft/min. Room Pressure 6 Room Pressure Displayed in inches H2O.

Host DDC system must divide by 100,000 to report pressure correctly

Total Supply Flow 7 Total supply into laboratory Displayed in CFM. Total Exhaust Flow 8 Total exhaust out of laboratory Displayed in CFM. Offset Set point 9 Current offset set point Displayed in CFM. Temperature 10 Current temperature value Fume Hood 1 Flow 11 Flow measured by flow station

Displayed in °F. Displayed in CFM.

connected to hood input #1.

Fume Hood 2 Flow 12 Flow measured by flow station

Displayed in CFM.

connected to hood input #2.

Fume Hood 3 Flow 13 Flow measured by flow station

Displayed in CFM.

connected to hood input #3.

Fume Hood 4 Flow 14 Flow measured by flow station

Displayed in CFM.

connected to hood input #4.

Fume Hood 5 Flow 15 Flow measured by flow station

Displayed in CFM.

connected to hood input #5.

Fume Hood 6 Flow 16 Flow measured by flow station

Displayed in CFM.

connected to hood input #6.

Fume Hood 7 Flow 17 Flow measured by flow station

Displayed in CFM.

connected to hood input #7.

Exhaust 1 Flow 18 Flow measured by flow station

Displayed in CFM.

connected to general exhaust input #1.

Exhaust 2 Flow 19 Flow measured by flow station

Displayed in CFM.

connected to general exhaust input #2.

Supply 1 Flow 20 Flow measured by flow station

Displayed in CFM.

connected to supply flow input #1

Supply 2 Flow 21 Flow measured by flow station

Displayed in CFM.

connected to supply flow input #2

Supply 3 Flow 22 Flow measured by flow station

Displayed in CFM.

connected to supply flow input #3

Supply 4 Flow 23 Flow measured by flow station

Displayed in CFM.

connected to supply flow input #4

76 Appendix B

Page 83

Variable Name

Pressure Set point 24 Pressure control set point Displayed in ft/min. Min Vent Set point 25 Minimum flow set point for ventilation. Displayed in CFM. Cooling Flow 26 Minimum flow set point for temperature

Unoccupied Min Set point Low Alarm 28 Low pressure alarm set point Displayed in ft/min. High Alarm 29 High pressure alarm set point Displayed in ft/min. Min Supply Alarm 30 Minimum supply flow alarm Displayed in CFM. Max Exhaust Alarm 31 Maximum general exhaust alarm Displayed in CFM. Min Offset Set point 32 Minimum offset set point Displayed in CFM. Max Offset Set point 33 Maximum offset set point Displayed in CFM. Max Supply Set point 34 Maximum supply set point Displayed in CFM. Min Exhaust Set point Temp Set point 36 Temperature set point

Unoccupied Temp Set point Supply Damper Position Exhaust Damper Position Reheat Valve Position Units 106 Current pressure units displayed 0 Feet per minute

*Note: Items in italics are read only variables.

EXAMPLE of 16 (10 Hex) Preset Multiple Regs function format: This example changes the minimum ventilation set point to 1000 CFM

Variable Address Input Provided to Master System

control.

27 Unoccupied (Setback) minimum flow

set point.

35 Minimum exhaust set point Displayed in CFM.

55 Unoccupied (Setback) temperature set

point

64 Current damper position for supply

control

65 Current damper position for exhaust

control

66 Current valve position for temperature

control

Integer DDC system receives

Displayed in CFM.

Displayed in °F Displayed in °F

0 to 100%

1 meters per second 2 inches of H 3 Pascal

QUERY RESPONSE

Field Name (Hex) Field Name (Hex) Slave Address 01 Slave Address 01 Function 10 Function 10 Starting Address Hi 00 Starting Address Hi 00 Starting Address Lo 19 Starting Address Lo 19 No. Of Registers Hi 00 No. of Registers Hi 00 No. Of Registers Lo 01 No. of Registers Lo 01 Data Value (High) 03 Error Check (CRC) -Data Value (Low) E8 Error Check (CRC) --

Example of 03 Read Holding Registers function format: This example reads the total supply and total exhaust.

Network/Modbus Communications 77

Page 84

QUERY RESPONSE

Field Name (Hex) Field Name (Hex) Slave Address 01 Slave Address 01 Function 03 Function 03 Starting Address Hi 00 Byte Count 04 Starting Address Lo 07 Data Hi 03 No. Of Registers Hi 00 Data Lo 8E (1000 CFM) No. Of Registers Lo 02 Data Hi 04 Error Check (CRC) -- Data Lo B0 (1200 CFM) Error Check (CRC)

78 Appendix B

Page 85

N2 Communications Description of Variables

NPT - Network Point Type

Variables are defined as analog inputs, binary inputs, and analog outputs. Analog inputs are current control parameters and items that the controller is measuring. Binary inputs represent controller states. Analog outputs are the programmable set points for the isolation room pressure controller and monitor. These set points can be changed through the keypad or by overriding the current set point.

NPA - Network Point Address

Address of the desired point.

Change of Status (COS) - Room Pressure Analog Input

The 8682 has the ability to change control set points locally. The alarm set points need to be based on the controller’s control set point (AO #1). For example the set point could go from -0.002 in. H the COS alarm set points are not changed to accommodate, you could get low alarm or low warning messages when the unit is working correctly. If these alarm points are set outside of the negative and positive set point values, incorrect alarm messages can be prevented.

Override Analog Input Command

Analog Input values can be set using the override command. These values will be reset to the correct items when the Override is released. There is not a time-out on the override command.

Override Binary Input Command

Overriding a 1 to Emergency binary inputs enables that mode. To release the controller from emergency state, override a 0 to the Emergency input or press either the emergency or reset key. Releasing the override will return the controller to the Normal state.

The alarm and data error variables can be overridden, but this will not affect the controller. Overriding the low alarm variable will result in a change of status, but will not put the controller into low alarm mode. The local alarm modes can only be controlled locally. Only override these variables for diagnostic purposes and release them for normal operation.

Binary Input Data Error

Data Error binary inputs are used to indicate if something has gone wrong with the controller. Data Error indicates when some of the data stored on the device has been corrupted. The calibration and set point values should be checked on the controller.

Override Analog Output Command

The analog output variables can be overridden to change their values. The overridden value will be checked for validity. If invalid, the override command will be ignored and the value will not change. The override flag will not be set when the value is ignored. The override command will be cleared when the variable is reset in the menus. The variable will not reset with the release command.

O to +0.001 in. H2O. If

Network/Modbus Communications 79

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Supported Commands

Command Response

Request Device ID Returns 0x10 Synchronize Time Command Acknowledged. There Is No Internal Clock To

Synchronize. Poll Without/With Ack Message Any Change Of Status Is Returned Read Analog Input Command Variable Value Read Binary Input Command Variable Value Read Analog Output Command Variable Value Write Analog Input Acknowledge Write Binary Input Acknowledge Write Analog Output Acknowledge Override Analog Input Command Acknowledge Override Binary Input Command Acknowledge Override Analog Output Command Acknowledge Override Release Request Acknowledge Identify Device Type Command Returns 0x10h

Note: Poll Without/With Ack Message will need to be sent twice in order to receive all of the possible change of

status variables.

Variable Map

NPT NPA UNITS

AI 1 ft/min, m/s, in.

O, Pa

DESCRIPTION

Room Pressure Value

AI 2 CFM, l/s Current Offset AI 3

°F, °C

Current Temperature AI 4 CFM, l/s Minimum Supply Set point AI 5 CFM, l/s Total Hood Exhaust AI 6 CFM, l/s Total Auxiliary Exhaust AI 7 CFM, l/s Total Supply AI 8 CFM, l/s Total Exhaust AI 9 CFM, l/s Hood 1 Flow AI 10 CFM, l/s Hood 2 Flow AI 11 CFM, l/s Hood 3 Flow AI 12 CFM, l/s Hood 4 Flow AI 13 CFM, l/s Hood 5 Flow AI 14 CFM, l/s Hood 6 Flow AI 15 CFM, l/s Hood 7 Flow AI 16 CFM, l/s Auxiliary Exhaust 1 Flow AI 17 CFM, l/s Auxiliary Exhaust 2 Flow AI 18 CFM, l/s Supply 1 Flow AI 19 CFM, l/s Supply 2 Flow AI 20 CFM, l/s Supply 3 Flow AI 21 CFM, l/s Supply 4 Flow AI 22 % Supply Control Output AI 23 % Exhaust Control Output AI 24 % Temp. Control Output BI 1 Low Pressure Alarm 0=Normal

1=Low Alarm BI 2 High Pressure Alarm 0=Normal

1=High Alarm

80 Appendix B

Page 87

NPT NPA UNITS

DESCRIPTION

BI 3 Min. Supply Flow Alarm 0=Normal

1=Low Flow Alarm BI 4 Max. Exhaust Flow Alarm 0=Normal

1=High Flow Alarm BI2 5 Emergency Mode 0=Normal

1=Emergency BI2 6 Unoccupied Mode 0=Normal Mode

1=Unoccupied Mode BI 7 Data Error 0=Normal

1=Data Error AO 1 ft/min, m/s, in.

O, Pa

AO 2 ft/min, m/s, in.

O, Pa

AO 3 ft/min, m/s, in.

O, Pa

Control Set point

Low Alarm Set point

High Alarm Set point

AO 4 CFM, l/s Minimum Supply Volume Ventilation Set point AO 5 CFM, l/s Minimum Supply Volume Temperature Set point AO 6 CFM, l/s Minimum Supply Volume in Unoccupied Mode AO 7 CFM, l/s Minimum Supply Flow Alarm Set point AO 8 CFM, l/s Max. Exhaust Flow Alarm Set point AO 9 CFM, l/s Minimum Offset Set point AO 10 CFM, l/s Maximum Offset Set point AO 11 CFM, l/s Maximum Supply Flow Set point AO 12 CFM, l/s Minimum Exhaust Flow Set point AO 13 AO 14

°F, °C °F, °C

Temperature Set point

Unoccupied Temperature Set point AO 15 # Units 0=Feet per minute

1=Meters per second

2=Inches of H

3=Pascals

Units will correspond with choice in UNITS variable (AO #14). Flow rates will either be CFM or l/s, based on

whether UNITS variable is set for an English or metric unit type. Temperatures will be either °F or °C, depending on the UNITS variable.

These are the only binary units that can be remotely activated.

Network/Modbus Communications 81

Page 88

LonWorks Node Object

LON Works Room Controller Status Definitions

nv1

nv2

nv3

Bit Description Bit Description

0 Standard 0 Normal 1 Unoccupied 2 Low Alarm 2 Communications Error 3 High Alarm 3 Remote Set point 4 Minimum Supply Alarm 4 LON Override 5 Maximum Exhaust Alarm

6 Data Error 7 Emergency

nviRequest SNVT_obj_request

nviSetTime SNVT_time_stamp

nviMute SNVT_switch

nvoControlStatus nvoStatusIndex

Node Object

Network variables

Configuration properties

nci 4 nciOutInht

nci 165 nciDeviceIndex

nci 166 nciFirmwareVer

nv4

nv5

nv6

nv7

nvoStatus SNVT_obj_status

nvoAlarm SNVT_alarm

nvoControlStatus SNVT_char_ascii

nvoStatusIndex SNVT_char_ascii

82 Appendix B

Page 89

LonWorks Object

nv1

nv2

nv3

nv4

nv5

nv6

nviSpaceTemp SNVT tem

nviControlMode SNVT occu

nviEmergMode SNVT hvac emer

nviExhOverride SNVT hvac overi

nvoSupOverride SNVT hvac overi

nviSpaceTempSet SNVT tem

Adaptive Offset Controller Object

anc

nv7

nv8

nv9

nv10

nv11

nv12

nv13

nv14

nv15

nv16

nv17

nv18

nv19

nv20

nv21

nv22

nv23

nv25

nv26

nv27

nv28

nv29

nvoFlowOffset SNVT flow f

nvoTotExhFlo SNVT flow

nvoTotSupFlo SNVT flow

nvoSpaceTemp SNVT tem

nvoRoomPress SNVT

nvoTotGenExhFlo SNVT flow

nvoTotHoodExhFlo SNVT flow

nvoSupDamperPos SNVT lev

nvoExhDamperPos SNVT lev

nvoRehtValvePos SNVT lev

nvoMinOffsetSet SNVT flow f

nvoMaxOffsetSet SNVT flow f

nvoMinSupFloSet SNVT flow

nvoMaxSupFloSet SNVT flow

nvoUnOccSupFlo SNVT flow

nvoMinExhFloSet SNVT flow

nvoLoSupFloAlm SNVT flow

nvoHiExhFloAlm SNVT flow

nvoCoolSupFlo SNVT flow

nvoRmPressSet SNVT

nvoLoRmPressAlm SNVT

nvoHiRmPressAlm SNVT

ress f

ercent

ress f

Configuration properties

nci 49 nciMaxSendTime nci 52 nciMinSendTime nci 47 nciSndDeltaFlow

nci 27 nciSndDeltaPress nci64 nciSndDeltaTemp nci 27 nciSndDeltaPos

Network/Modbus Communications 83

Page 90

8682 BACnet MS/TP Protocol Implementation Conformance Statement

Date: July 11, 2007 Vendor Name: TSI Inc. Product Name: S Product Model Number: 8682-BAC Applications Software Version: 1.0 Firmware Revision: 1.0 BACnet Protocol Revision: 2

Product Description:

UREFLOW™ Room Pressure Controls are designed to maintain more exhaust from a laboratory than is

TSI S supplied to it. This negative air balance helps ensure that chemical vapors cannot diffuse outside the laboratory. The

UREFLOW Model 8682 also controls the temperature of the laboratory space by modulating reheat and the supply

S air volume. Optionally, a room pressure sensor can be connected to the S long-term changes in the building dynamics. This model controller is capable of acting as a stand-alone device or as part of a building automation system via BACnet MS/TP protocol.

BACnet Standardized Device Profile (Annex L):

 BACnet Operator Workstation (B-OWS)  BACnet Building Controller (B-BC)  BACnet Advanced Application Controller (B-AAC) ; BACnet Application Specific Controller (B-ASC)  BACnet Smart Sensor (B-SS)  BACnet Smart Actuator (B-SA)

List all BACnet Interoperability Building Blocks Supported (Annex K):

DS-RP-B DM-DDB-B DS-WP-B DM-DOB-B DS-RPM-B DM-DCC-B

Segmentation Capability:

Segmented requests not supported Segmented responses not supported

UREFLOW™ Adaptive Offset Controller

UREFLOW Model 8682 controller to correct

84 Appendix B

Page 91

Standard Object Types Supported:

Dynamically

Createable

Dynamically Deletable

Optional Properties Supported

Writable Properties (Data Type)

Analog Input No No Analog Value No No Present_Value

(Real)

Binary Input No No Active_Text,

Inactive_Text

Binary Value No No Active_Text,

Inactive_Text

Present_Value

(Enumerated) Multi-state Input No No State_Text Multi-state Value No No State_Text Present_Value

(Unsigned Int) Device Object No No Object Name

(Char String)

Max Master

(Unsigned Int)

Data Link Layer Options:

 BACnet IP, (Annex J)  BACnet IP, (Annex J), Foreign Device  ISO 8802-3, Ethernet (Clause 7)  ANSI/ATA 878.1, 2.5 Mb. ARCNET (Clause 8)  ANSI/ATA 878.1, RS-485 ARCNET (Clause 8), baud rate(s) ; MS/TP master (Clause 9), baud rate(s): 76.8k 38.4k, 19.2k, 9600 bps  MS/TP slave (Clause 9), baud rate(s):  Point-To-Point, EIA 232 (Clause 10), baud rate(s):  Point-To-Point, modem, (Clause 10), baud rate(s):  LonTalk, (Clause 11), medium:  Other:

Device Address Binding:

Is static device binding supported? (This is currently necessary for two-way communication with MS/TP slaves and certain other devices.) Yes ; No

Networking Options:

 Router, Clause 6 - List all routing configurations, e.g., ARCNET-Ethernet, Ethernet-MS/TP, etc.  Annex H, BACnet Tunneling Router over IP  BACnet/IP Broadcast Management Device (BBMD)

Character Sets Supported:

Indicating support for multiple character sets does not imply that they can all be supported simultaneously.

; ANSI X3.4  IBM

™

/Microsoft™ DBCS  ISO 8859-1

 ISO 10646 (UCS-2)  ISO 10646 (UCS-4)  JIS C 6226

If this product is a communication gateway, describe the types of non-BACnet equipment/networks(s) that the gateway supports:

Not Applicable

Network/Modbus Communications 85

Page 92

Model 8682-BAC BACnet MS/TP Object Set

Device

Object Type

Analog Input

Analog Input 2 cfm, l/s Total Supply Flow Analog Input

Analog Input 4 cfm, l/s Total Hood Flow Analog Input 5 cfm, l/s Total Exhaust Flow Analog Input 6 cfm, l/s Supply 1 Flow Rate Analog Input 7 cfm, l/s Supply 2 Flow Rate Analog Input 8 cfm, l/s Supply 3 Flow Rate Analog Input 9 cfm, l/s Supply 4 Flow Rate Analog Input 10 cfm, l/s Exhaust 1 Flow Rate Analog Input 11 cfm, l/s Exhaust 2 Flow Rate Analog Input 12 cfm, l/s Hood 1 Flow Rate Analog Input 13 cfm, l/s Hood 2 Flow Rate Analog Input 14 cfm, l/s Hood 3 Flow Rate Analog Input 15 cfm, l/s Hood 4 Flow Rate Analog Input 16 cfm, l/s Hood 5 Flow Rate Analog Input 17 cfm, l/s Hood 6 Flow Rate Analog Input 18 cfm, l/s Hood 7 Flow Rate Analog Input 19 cfm, l/s Supply Flow Set Point Analog Input

Analog Input 21 cfm, l/s Current Flow Offset Analog Input 22 °F, °C Temperature Analog Input 23 % Open Supply Damper Position Analog Input 24 % Open Exhaust Damper Position

Analog Input 25 % Open Reheat Valve Position Analog Value 1 MAC Address 1 to 127 Analog Value

Analog Value

Analog Value 8 cfm, l/s Vent Min Set Point 0 to 30,000 cfm Analog Value 9 cfm, l/s Cooling Flow Set Point 0 to 30,000 cfm Analog Value 10 cfm, l/s Unocc Flow Set Point 0 to 30,000 cfm Analog Value 11 cfm, l/s Min Offset 0 to 30,000 cfm Analog Value 12 cfm, l/s Max Offset 0 to 30,000 cfm Analog Value 13 cfm, l/s Max Supply Set Point 0 to 30,000 cfm Analog Value 14 cfm, l/s Min Exhaust Set Point 0 to 30,000 cfm

Instance *Units Description

ft/min, m/s,

O, Pa

in. H

3 cfm, l/s

20 cfm, l/s

ft/min, m/s,

O, Pa

in. H

ft/min, m/s,

O, Pa

in. H

ft/min, m/s,

O, Pa

in. H

ft/min, m/s,

O, Pa

in. H

ft/min, m/s,

O, Pa

in. H

ft/min, m/s,

O, Pa

in. H

Room Pressure

Total General Exhaust Flow

General Exhaust Flow Set Point

Room Pressure Set Point -0.19500 to 0.19500

in. H2O

Remote Pressure Set Point -0.19500 to 0.19500

in. H2O

Low Pressure Alarm -0.19500 to 0.19500

in. H2O

High Pressure Alarm -0.19500 to 0.19500

in. H2O Remote Low Pressure Alarm Remote High Pressure Alarm

-0.19500 to 0.19500

in. H2O

-0.19500 to 0.19500

in. H2O

86 Appendix B

Page 93

Device

Object Type

Instance *Units Description

Analog Value 15 cfm, l/s Min Supply Alarm 0 to 30,000 cfm Analog Value 16 cfm, l/s Max Exhaust Alarm 0 to 30,000 cfm Analog Value 17 °F, °C Temperature Set Point 50 to 85 °F Analog Value 18 °F, °C Unocc Temp Set Point 50 to 85 °F

Binary Value

Multi-State

Input

Occ/Unocc Mode 0 Occupied

1 Unoccupied Remote Mode 0 Normal Mode

1 Remote Mode Status Index 1 Normal

2 Dim Data Error

3 Low Press Alarm

4 High Press Alarm

5 Min Supply Alarm

6 Max Exhaust Alarm

7 Data Error

8 Cal Error

9 Emergency

Multi-State

Value

Emergency Mode 1 Exit Emergency

Mode

2 Enter Emergency

Mode

Multi-State

Value

Units Value 1 ft/min

2 m/s

3 in. H

4 Pa

Device 868001** TSI8682

* The units are based on the value of the Units Value object. When the Units Value is set to 1 or 3 the units are in

English form. When the Units Value is set to 2 or 4 the units are metric. English is the default value.

** The device instance is 868000, summed with the MAC address of the device.

Network/Modbus Communications 87

Page 94

Page 95

Appendix C

Wiring Information

Back Panel Wiring

PIN #

9, 10 Output 0–10 VDC pressure differential signal

11, 12 Input Non powered switch input.

13, 14 Output Low alarm relay - N.O., closes in low alarm condition.

15, 16 Communications RS-485 communications; DIM to Adaptive Offset Controller (AOC)

17- 22 No Connection No function.

23, 24 Input Non powered switch input – N.O. contacts for Emergency input

25, 26 Output High alarm relay - N.O., closes in high alarm condition.

5– 18 Input 0–10 VDC flow station signal - fume exhaust. 21–24 Input 0–10 VDC flow station signal - General exhaust. 25–28 Input 0–10 VDC flow station signal - Supply air. 29, 30 Input 31, 32 Input 0–10 VDC flow station signal - Supply air.

33,34 Input 24 VAC to power Adaptive Offset Controller (AOC).

36, 37 Output 24 VAC Power for DIM. 38, 39 Communications RS-485 communications; AOC to building management system (Modbus or N2) 40, 41 Communications RS-485 communications; AOC to DIM 42, 43 Communications LonWorks communications to building management system (optional)

44, 45 Output 0–10 VDC, reheat valve control signal. 10 VDC = open (n.o. damper)

46, 47 Output 0–10 VDC, supply air control signal. 10 VDC = open (n.o. damper)

48, 49 Output 0–10 VDC, general exhaust control signal. 10 VDC = open (n.o. damper)

Input / Output / Communication DIM

1, 2 Input 24 VAC to power Digital Interface Module (DIM).

3, 4 Output 24 VAC power for Pressure Sensor 5, 6 Input 0–10 VDC pressure sensor signal 7, 8 Communications RS-485 communications between DIM and pressure sensor

AOC

1, 2 Input 0–10 VDC flow station signal - Supply air. 3, 4 Input Non powered switch input.

35 Ground Earth ground

Description

NOTE: 24 VAC becomes polarized when connected to DIM.

- See menu item OUTPUT SIG

- See menu item UNOCCUPY SET.

- See menu item LOW ALARM

NOTE: Closing these contacts puts the unit into Emergency Mode. Set

points will not be maintained in Emergency Mode.

- See menu item HIGH ALARM

- See menu item REM SET POINT

1000 Ω RTD temperature signal

NOTE: 24 VAC becomes polarized when connected to AOC.

BACnet MSTP communications to building management system (8682-BAC)

- See menu item REHEAT SIG

- See menu item CONTROL SIG

Page 96

Wiring Information (continued)

PIN #

Input / Output / Communication AOC (continued)

Description

50, 51 Output 0–10 VDC, total supply flow

- See menu item OUTPUT SIG

52, 53 Output 0–10 VDC, total exhaust flow

- See menu item OUTPUT SIG

54, 55 Output Low supply flow alarm relay - N.O., closes in low flow condition.

- See menu item MIN SUP ALM.

56, 57 Output High exhaust flow alarm relay - N.O., closes in low flow condition.

- See menu item MAX EXH ALM.

90 Appendix C

Page 97

WARNING: The wiring diagram shows polarity on many pairs of pins: ±, H / N, A / B. Damage to the

DIM and AOC may occur if polarity is not observed.

WARNING: Controller must be wired exactly as wire diagram shows. Making modifications to the wiring

may severely damage the unit.

Figure 11: Wiring Diagram–Electric

Wiring Information

Page 98

Page 99

Appendix D

Access Codes

There is one access code for all menus. If the access code is required to enter a menu, pressing the key sequence below will allow access to the menu. The access code must be entered within 40 seconds and each key must be pressed within 8 seconds. An incorrect sequence will not allow access to the menu.

Key #

1 Emergency

2 Mute

3 Mute

4 Menu

5 Aux

ACCESS CODE

Page 100

TSI Instruments SUREFLOW 8682, SUREFLOW 8682-BAC Operation And Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

LIMITATION OF WARRANTY AND LIABILITY

How to Use This Manual

PART ONE

User Basics

The Instrument

Useful User Information

Operator Panel

Green / Red Light

Operator Panel

Digital Display

Keypad

User Keys - Gray with Black Letters

TEST Key

RESET Key

MUTE Key

AUX Key

MENU Key

SELECT Key

Emergency Key - Red with Black Letters

EMERGENCY Key

Alarms

Visual Alarm Operation

Audible Alarm Operation- EMERGENCY key When the EMERGENCY key is pressed, the audible alarm beeps intermittently until the EMERGENCY or RESET key is pressed terminating the emergency alarm. The emergency alarm cannot be silenced by pressing the MUTE key.

Audible Alarms - All Except Emergency

Before Calling TSI

PART TWO

Technical Section

Software Programming

Programming Keys

MENU Key

SELECT Key

Keystroke Procedure

Programming Example

Menu and Menu Items

ALARM CONSTRAINTS

Setup / Checkout

Theory of Operation

Calibration

Calibrating Pressure Sensor

Flow Station Pressure Transducer Zero

2-Point Flow Calibration

Hood Flow Calibration

Maintenance and Repair Parts

System Component Inspection

Pressure Sensor Cleaning

Replacement Parts

Troubleshooting Section

Hardware Test

Appendix A

Specifications

Appendix B

Network Communications

Modbus Communications

N2 Communications Description of Variables

NPT - Network Point Type

NPA - Network Point Address

Change of Status (COS) - Room Pressure Analog Input

Override Analog Input Command

Override Binary Input Command

Binary Input Data Error

Override Analog Output Command

Supported Commands

Variable Map

LON Works Room Controller Status Definitions

LonWorks Object

8682 BACnet MS/TP Protocol Implementation Conformance Statement

Model 8682-BAC BACnet MS/TP Object Set

Appendix C

Wiring Information

Back Panel Wiring

Appendix D

Access Codes