TSI Instruments SUREFLOW 8682 Operation manual

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

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: Sales & Customer Service:
[phone]/[phone] (001 651) 490-2811
Fax: Fax:
[phone] (001 651) 490-3824
SHIP/MAIL TO: E-MAIL
TSI Incorporated [email protected]
ATTN: Customer Service
500 Cardigan Road WEB SITE
Shoreview, MN 55126 www.tsi.com
USA

ii
Copyright ©- TSI Incorporated / Revision D / 2008 / All rights reserved.
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 [phone] or
[phone].
TRADEMARKS
SUREFLOW™ is a trademark of TSI Incorporated.

iii
CONTENTS
HOW TO USE THIS MANUAL ..........................................................................................IV
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.............................................................................................. 84
Model 8682-BAC BACnet MS/TP Object Set ......................................... 86
APPENDIX C .................................................................................................................... 89
Wiring Information................................................................................... 89
APPENDIX D .................................................................................................................... 93
Access Codes ......................................................................................... 93

iv
How to Use This Manual
The SUREFLOW™Operation and Service Manual is divided into two parts. Part One describes
how the SUREFLOW unit functions and how to interface with the device. This section should be
read by users, facilities staff, and anyone who requires a basic understanding of how the
SUREFLOW 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 SUREFLOW controller installation.
Refer to the Installation Instructions to determine if the SUREFLOW controller has been
properly installed.

1
PART ONE
User Basics
Part One provides a brief but thorough overview of the SUREFLOW™ product by maximizing information with
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.
The Instrument
The SUREFLOW Adaptive Offset Controller (AOC) maintains laboratory pressure and air balance. The AOC
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.

2 Part One
The SUREFLOW 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.
The SUREFLOW controller consists of three pieces: pressure sensor, Digital Interface Module (DIM), and Adaptive
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)
SUREFLOW™ controller has two levels of user information:
1. SUREFLOW has a red light and green light to provide continuous information on room pressure
status.
2. SUREFLOW 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.

User Basics 3
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: SUREFLOW Operator Panel–Open
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.

4 Part One
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 SUREFLOW. 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/TKeys
The S/Tkeys 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.

User Basics 5
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
SUREFLOW has visual (red light) and audible alarms to inform you of changing conditions. The alarm levels (set
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
SUREFLOW items installed, programmed alarms will activate when room pressure is low or inadequate, when room
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 H2O. When the
room pressure drops below -0.001 inches H2O (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 H2O.
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).

6 Part One
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* 8682- ____
•Software revision levels*
•Facility where unit is installed
* First three items that scroll when TEST key is pressed
Due to the different SUREFLOW 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: Sales & Customer Service:
[phone]/[phone] (001 651) 490-2811
Fax: Fax:
[phone] (001 651) 490-3824
SHIP/MAIL TO: E-MAIL
TSI Incorporated [email protected]
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 http://rma.tsi.com.

Technical Section 7
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.
The Software Programming section explains the programming keys on the DIM. In addition, the programming
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.
The Menu and Menu Item section lists all of the software items available to program and change. The items are
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).
The Setup / Checkout section; explains the AOC controller theory of operation, lists the menu items that need to be
programmed for the system to operate, provides a programming example, and provides information to confirm
system is operating correctly.
The Calibration section describes the required technique to compare the pressure sensor reading to a thermal
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.
The Maintenance and Repair Part section covers all routine maintenance of equipment, along with a list of repair
parts.
Software Programming
Programming the SUREFLOW controller is quick and easy if the programming keys are understood and the proper
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.

Part Two
8
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/TKeys
The S/Tkeys 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.

Technical Section 9
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/Tkeys 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/Tkeys 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/Tkeys 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 H2O to -0.003 inches H2O.
nUnit is in normal operation scrolling room pressure, flows, etc. Pressure is shown
in this case.
PRESSURE
-.00100 “H2O
oPress the MENU key to gain access to the menus.
The first two menu choices are displayed. SET POINTS
ALARM
pPress the Tkey 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

Part Two
10
qPress the Tkey once. HIGH ALARM will be shown on display.
Menu selected
Item name
ALARM
HIGH ALARM
rPress 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.
Item Name
Current Value
HIGH ALARM
-.00200 "H2O
sPress the Tkey to change the high alarm set point to –0.003 inches H2O.
HIGH ALARM
- .00300 "H2O
tPress the SELECT key to save the new negative high alarm set point.
Three short beeps will sound indicating that the data is being
saved.
HIGH ALARM
Saving Data
Immediately after the data is saved, the SUREFLOW 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).
ALARM
HIGH ALARM
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.
uPress the MENU key once to return to the menu level:
ALARM
CONFIGURE
vPress the MENU key a second time to return to the normal operating level:
Unit is now back in normal operation
PRESSURE
-.00100 "H2O

Technical Section 11
Menu and Menu Items
The SUREFLOW controller is a very versatile device which can be configured to meet your specific application. This
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 Programming Software for a detailed explanation. This section
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
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
ALARM
LOW ALARM
HIGH ALARM
REM LOW ALM
REM HIGH ALM
MIN SUP ALM
MAX EXH ALM
ALARM RESET
AUDIBLE ALM
ALARM DELAY
MUTE TIMEOUT
CONFIGURE
UNITS
EXH CONFIG
ACCESS CODES
CALIBRATION
SENSOR SPAN
ELEVATION
TEMP CAL
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
SYSTEM FLOW
TOT SUP FLOW
TOT EXH FLOW
OFFSET VALUE
SUP SET POINT
EXH SET POINT
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
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

Part Two
12
INPUT CHECK
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
INTERFACE
NET PROTOCOL*
NET ADDRESS*
LON*
MAC ADDRESS*
OUTPUT RANGE
OUTPUT SIG
MAX FLOW OUT
SUPPLY FLOW
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
SP2 LOW CAL
SP2 HIGH CAL
SP3 LOW CAL
SP3 HIGH CAL
SP4 LOW CAL
SP4 HIGH CAL
RESET CAL
EXHAUST FLOW
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
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.

TechnicalSection 13
SET POINTS MENU
MENU ITEM
SOFTWARE
NAME ITEM DESCRIPTION ITEM RANGE
DEFAULT
VALUE
PRESSURE SET
POINT
SET POINT
The SET POINT item sets the pressure control set point. The
SUREFLOW controller will maintain this set point, negative or
positive, under normal operating conditions.
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.
0 to -0.19000 in. H2O or
0 to +0.19000 H2O
-0.00100” H2O
REMOTE OR
ALTERNATE
PRESSURE SET
POINT
REM SET
POINT
The REM SET POINT item sets an alternate control set point.
The SUREFLOW controller will maintain the room pressure at the
alternate set point when this item is enabled.
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.
0 to -0.19000 in. H2O or
0 to +0.19000 in. H2O
0
VENTILATION
MINIMUM
SUPPLY FLOW
SET POINT
VENT MIN
SET
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
(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
(ft2): square meters (m2).
0

14 Part Two
SET POINTS MENU (continued)
MENU ITEM
SOFTWARE
NAME ITEM DESCRIPTION ITEM RANGE
DEFAULT
VALUE
SPACE COOLING
SUPPLY FLOW
SET POINT
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).
WIRING: This item requires a 1000 Ωplatinum 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.
0-30,000 CFM
(0-14,100 l/s)
Linear based flow
stations 0to TOP
VELOCITY times the
duct area in square feet
(ft2): square meters (m2).
0