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Models 8681/8681_BAC SureFlow Adaptive Offset Controller

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1. 1 1 NO LON 1 2 GOOH ALON 17008 angy YIWYOJSNVYL 915 0 LNANI 7031405 2 GOOH 7031405 15 81 11 OL 6 5 HOLVN LOV 2041409 58754 NI 1 0 110 OWA be 651708 NI OWA v2 02 872008 02 61 NNOO 9 ONIMIM NOILVLS NI SIS 1519 0 2 NI SIS 1419 U YOSNAS YATIOULNOOD ISL 100 717008 N d 1 YSWYOSSNVYL 027008 Nid NI OVA Zu UYSWYOASNVYL EE 54 202 NI 057008 N d 2 OVA ve 109 051 74 gue Actuator Ic Damper System with Electr iagram D ing Wiring Offset Flow Tracki Figure 11 73 Wiring Information 74 This page intentionally left blank Appendix C Appendix D Access Codes There is one access code for all menus Each menu can have the access code ON or OFF IF on the access code must be entered Pressing the key sequence below allows access to the menu The access code must be entered within 40 seconds and each key must be pressed within 8 seconds Incorrect sequ
2. Analog 1 ft min m s in Room Pressure Input Pa fier 2 Supply Flow Rate fiers 3 l s Supply Flow Setpoint hry 4 cfm Exhaust Flow 5 cfm Exhaust Flow fir 6 l s Hood Flow Rate Analog 7 Current Flow Offset Input Analog 8 oF Temperature Input open 10 poston S 11 Reheat Valve Position Input Analog 1 Address 1 to 127 Value Analog 2 ft min m s in Room Pressure 0 19500 to 0 19500 Value Pa Setpoint Analog 3 ft min m s in Low Pressure Alarm 0 19500 to 0 19500 Value Pa in H2O Analog 4 ft min m s in High Pressure Alarm 0 19500 to 0 19500 Value Pa in H2O ae 5 l s Vent Min Setpoint 0 to 30 000 cfm aa 6 I s Cooling Flow Setpoint 0 to 30 000 cfm one gt 1 8 Unocc Flow Setpoint 0 to 30 000 cfm 8 Max Supply Setpoint 0 to 30 000 cfm one 9 l s Min Exhaust Setpoint to 30 000 cfm 10 I s Min Offset 0 to 30 000 cfm 11 5 Max Offset 0 to 30 000 cfm ae 12 Min Supply Alarm 0 to 30 000 cfm Analog 13 I s Max Exhaust Alarm 0 to 30 000 cfm Value Analog 14 oF Temperature Setpoint 50 to 85 F Value Network Modbus Communications 69 Analog 15 oF Unocc Temp Setpoint 50 to 85 F Value Binary 1
3. 110 NI SIS 1319 2 0 0 915 THLO YSTIONLNOOD ISL 110 20 2 YOSNIS J 922008 Nid 100 NI OWA 2 OVA 2 T lt 057008 P N 800414 JON 9 Josuas aiNssald 910 09 021 OVA SLOVIISLOVL LHM we Gay Nid 09 YOLVNLOV nje gt 100 OVA vz 661708 Nid 027008 Nid YAWYOASNVYL OWA bz 1 09 02 LNdNI 872008 Coa Nid ZZ LZ SNid NNOO 9 NOLLWLS anavo 17008 Nid 31899 057008 YAWHOASNVYL NI OVA OWA 2 Sch Actuator Appendix C Ic Damper System with Electr iagram D iring Offset Wi Adapti Figure 10 72 7 XYOSNIS 619115199 NYO LHM 085008 N d 09 YOLVN LOV YINWYOJSNYYL WIG 39Y4Y3LNI 1Y LI9IA NOISH3A d1SW 821898 N d 5 924008 N d
4. 0 Value 1 Unoccupied Multi State Status Index 1 Normal Input 2 Low Press Alarm 3 High Press Alarm 1 4 Max Exhaust Alarm 5 Min Supply Alarm 6 Data Error 7 Emergency Multi State Emergency Mode 1 Exit Emergency Mode Value 2 2 Enter Emergency Mode 3 Normal Multi State Units Value 1 ft min Value 3 2 m s 3 in 4 868001 1518681 The units are based on the value of the Units Value object When the Units Value is set to 1 or 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 70 Appendix B Wiring Information Back Panel Wiring ______ DIM AOC 1 2 24 to power Digital Interface Module DIM NOTE 24 VAC becomes polarized when connected to DIM Output 24 VAC power for Pressure Sensor 0 to 10 VDC pressure sensor signal 8 RS 485 communications between DIM and pressure sensor 9 10 Output to 10 VDC general exhaust control signal 10 VDC open n o damper See menu item CONTROL SIG 11 12 0 to 10 VDC flow station signal fume exhaust HD1 FLOW IN 13 14 Output Alarm relay N O closes in low alarm condition See menu item ALARM RELAY 15 16 Communications RS 485 communications AOC to building management system 17 18 Output 0 to 10 VDC
5. UNOCCUPIED UNOCC The UNOCC TEMP item sets the temperature setpoint of 50 F to 85 F 68 F SPACE TEMP the space during unoccupied mode The SureFlow TEMPERATUR controller maintains the temperature setpoint under E SETPOINT unoccupied operating conditions WIRING The 1000Q platinum RTD temperature sensor is connected to the temp input pins 23 amp 24 DIM The temperature sensor signal is continuously monitored by the AOC MINIMUM MIN OFFSET The MIN OFFSET item sets the minimum air flow offset 10 000 to 10 000 0 FLOW OFFSET between total exhaust flow fume hood general exhaust CFM other exhaust and total supply flow MAXIMUM MAX The MAX OFFSET item sets the maximum air flow offset 10 000 to 10 000 0 FLOW OFFSET OFFSET between total exhaust flow fume hood general exhaust CFM other exhaust and total supply flow END OF The END OF MENU item informs you that the end of a MENU 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 LOW LOW ALARM The LOW ALARM item sets the low pressure alarm OFF OFF PRESSURE setpoint A low alarm condition is defined as when the 0 to 0 19500 ALARM room pressure falls below or goes in the opposite 0 to 0 19500 direction of the LOW ALARM setpoint HIGH HIGH The HIGH ALARM item sets the high pressure alarm OFF OFF PRESSURE ALARM setpoint A high alarm condition is defined as when
6. General Flow General General Exhaust Exhaust Staion Exhaust Flow 4 places Figure 6 Exhaust Configuration NOTE The flow station input fora GANGED flow measurement is to be wired to the applicable fume hood flow input either HD 1 INPUT terminals 11 amp 12 or the HD 2 INPUT terminals 27 amp 28 NOTE A GANGED flow measurement configuration still requires a separate General Exhaust flow measurement right side of Figure 6 Hed CONFIGURE MENU continued NETWORK ADDRESS NET ADDRESS The NET ADDRESS item is used to select the main 1 to 247 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 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 initiates 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 NOTE The Model 8681 network protocol is Modbus MAC Address MAC ADDRESS The MAC ADDRESS assigns the device an address on 1 to 127 the MS TP BACnet network This address must be unique for each device on the BACnet network MENU ACCESS CODES ACCESS CODES The ACCESS CODES item selects
7. 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 TEMPERATURE INPUT INPUT The TEMP INPUT item reads the input from the temperature sensor When this item is entered a temperature is indicated on the display The exact temperature displayed is relatively unimportant It is more important that the temperature changes indicating the temperature sensor is working correctly The output range that can be read is resistance RELAY OUTPUT ALARM RELAY The relay menu items are used to change the state of the relay contact When entered the display indicates either OPEN or CLOSED The A F keys are used to toggle the state of the relay Pressing the A key will OPEN the alarm contact Pressing the W key will CLOSE the alarm contact When the contact is closed the relay is in an alarm condition Ze Hed DIAGNOSTICS MENU continued RESET THE CONTROLLER TO FACTORY DEFAULT SETTINGS RESET TO DEF When this menu item is entered the 8681 prompts you to verify that you want to do this by indicating NO Use the A keys change the display to YES then press the SELECT key t
8. SUREFLOW ADAPTIVE OFFSET CONTROLLER MODELS 8681 8681 BAC OPERATION AND SERVICE MANUAL FEBRUARY 2013 STARTI SEEING THE BENEFIT REGISTERING TODAY Thank you for your TSI instrument purchase Occasionally TSI releases information on software updates product enhancements and new products By registering your instrument TSI will be able to send this important information to you http register tsi com As part of the registration process you will be asked for your comments on TSI products and services 515 customer feedback program gives customers like you a way to tell us how we are doing UNDERSTANDING ACCELERATED TSI Incorporated Visit our website www tsi com for more information USA Tel 1 800 874 2811 India Tel 91 80 67877200 UK Tel 44 149 4 459200 China Tel 86 10 8251 6588 France Tel 33 491 11 87 64 Singapore Tel 65 6595 6388 Germany Tel 49 241 523030 2012 TSI Incorporated Printed in U S A SUREFLOW ADAPTIVE OFFSET CONTROLLER MODELS 8681 8681 BAC OPERATION AND SERVICE MANUAL P N 1980476 REVISION E FEBRUARY 2013 U S AND CANADA OTHER COUNTRIES Sales amp Customer Service Sales amp Customer Service 800 874 281 1 651 490 2811 001 651 490 2811 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 J Copyright TSI In
9. Sensor Figure 8 Pressure Sensor Door Slid Open Sensor span NOTE Asmoke test and a comparison measurement by an air velocity meter are required to calibrate the pressure sensor The air velocity meter only gives a velocity reading so a smoke test must be performed to determine pressure direction Perform a smoke test to determine pressure direction 1 Select SENSOR SPAN item 2 Position thermal air velocity meter in door opening to obtain velocity reading Press 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 Flow station pressure transducer zero NOTE Not required for linear flow stations with 0 to 5 VDC output Pressure based flow station 1 Disconnect tubing between pressure transducer and flow station 2 Enter menu item that corresponds to flow station Hood flow Exhaust Flow or Supply flow 3 Select HD1 FLO ZERO or HD2 FLO ZERO 10 take a fume hood flow station zero or 4 Select EXH FLO ZERO to take a general exhaust flow station zero or Select SUP FLO ZERO to take a supply flow station zero Press SELECT key Flow zero procedure which takes 10 seconds is automatic Part Two 7 8 Press SELECT key to save data Connect tubing between pressure transducer and flow station Linear flow station 1 to 5 VDC output 1 Remove flow station from duct
10. 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 returns the unit to standard operating mode When scrolling through the items on a menu pressing the MENU key returns you to the list of menus When changing data in a menu item pressing the MENU key escapes out of the item without saving changes 3 When programming is complete pressing the MENU key returns 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 shows 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 now appears on the first line of the display and the second line shows the item value 3 Pressing the SELECT key when finished changing an item saves the data and exits back to the menu items An audible tone 3 beeps and visual display saving data gives confirmation data is being saved 10 Part Two A V Keys The keys are used
11. supply air control signal 10 VDC open n o See menu item CONTROL SIG Input 0 to 10 VDC flow station signal General exhaust EXH FLOW IN 21 22 0 to 10 VDC flow station signal Supply air SUP FLOW IN 23 24 1000Q platinum RTD temperature input signal 25 26 Output 0 to 10 VDC reheat valve control signal 10 VDC open n o damper See menu item REHEAT SIG 27 28 Input 0 to 10 VDC flow station signal fume exhaust HD2 FLOW IN BACnet MSTP communications to building management system NOTE Terminals 27 8 28 are utilized BACnet MSTP communications for Model 8681 BAC The Model 8681 BAC controller cannot accept a second fume hood flow input and all second fume hood flow menu items will be deleted from the menu structure 19 20 71 WIG INGON 39Y4YILNI dLSW 1 821898 NOISHSA 5 922008 N d YSTIONLNOOD diSW LANOVd NO LON LNdNI GOOH 31 717008 N d H anayo 918 0 1 7051405 lt 3 31 woo Woo iz 94 TOYNLNOD werd AlddNs ASNVHX3 7031405 6854 NI ino L GOOH XOSN S YOSNAS OWA 81 21 01 6 SNid YOLVNLOV 8 1
12. 50 CFM less than the minimum flow setpoint 3 The pressure alarms LOW ALARM HIGH ALARM can be programmed for positive or negative pressure However both the low and high alarm must be 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 setpoint 5 The ALARM RESET item selects how the alarms terminates 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 setpoint If latched is selected the alarms will not terminate until the controller returns to setpoint 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 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
13. ALARM RESET item selects how the alarms LATCHED UNLATCHED RESET terminate after the unit returns to control setpoint OR pressure or flow UNLATCHED alarm follow UNLATCHED automatically resets the alarms when the unit reaches control setpoint LATCHED requires the staff to press the RESET key after the unit returns to control setpoint The ALARM RESET affects the audible alarm visual alarm and relay output which means all are latched or unlatched AUDIBLE AUDIBLE The AUDIBLE ALM item selects whether the audible ON or OFF ON ALARM ALM 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 ALARM DELAY ALARM The ALARM DELAY determines the length of time the 20 to 600 20 SECONDS DELAY alarm is delayed after an alarm condition has been SECONDS 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 ALARM RELAY ALARM The ALARM RELAY item selects which alarms activate PRESSURE or PRESSURE RELAY the relay contacts pins 13 14 Selecting PRESSURE FLOW triggers the relays when a pressure alarm is present Selecting FLOW triggers the relays when a low flow condition exists This item only affects the relay contacts all audible and visual alarms are still active regardless
14. EXH FLOW IN HD1 FLOW IN HD2 FLOW HOOD FLOW HD1 DCT AREA HD2 DCT AREA HD1 FLO ZERO HD2 FLO ZERO MIN HD1 FLOW MIN HD2 FLOW HD1 LOW CAL HD1 HIGH CAL HD2 LOW CAL HD2 HIGH CAL FLO STA TYPE TOP VELOCITY RESET CAL CALIBRATION TEMP CAL SENSOR SPAN ELEVATION DIAGNOSTICS CONTROL SUP CONTROL EXH CONTROL TEMP SENSOR INPUT SENSOR STAT TEMP INPUT ALARM RELAY RESET TO DEF ADDRESS Menu Item only appears as a menu option for a Model 8681 BAC Adaptive Offset Controller which includes a BACnet MSTP board The Menu Item NET ADDRESS is deleted as a menu option on the Model 8681 BAC These menu items do not appear as options on the Model 8681 BAC Figure 5 Menu Items Model 8681 8681 BAC Controller Technical Section SETPOINTS MENU PRESSURE SETPOINT The SETPOINT item sets the pressure control setpoint 0 to 0 19500 0 00100 H20 The SureFlow controller maintains this setpoint negative or positive under normal operating conditions to 0 19500 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 OFFS
15. OF The END OF MENU item informs you that the end of a MENU 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 Hed 019 Le CONTROL MENU SPEED SPEED 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 1 to 10 bars 5 bars SENSITIVITY SENSITIVITY 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 is 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
16. Power rature Compensation Range Damper Actuator Types of Actuator Input Power Control Time for 90 Rotation S ig d input 0 20000 to 0 20000 inches 10 of reading 0 00001 inches 5 of reading 0 5 sec See Wiring Information Appendix C for 01010 VDC 1000 Q Platinum RTD 385 0 10090 SPST N O Max current 2A Max voltage 220 VDC Maximum power 60 W Contacts close in alarm condition 0to 10 VDC 0to 10 VDC to 10 VDC 4 20 mA Modbus RTU Model 8681 BAC only 32 to 120 F 24 VAC 5 watts max 4 9 in x 4 9 in x 1 35 in 0 7 Ib 55 to 95 F 0 16 watts at 0 inches 0 20 watts at 0 00088 inches 5 58 in x 3 34 in x 1 94 in 0 2 Ib Electric Electric 24 VAC 7 5 watts max 0 volts damper closed Electric 1 5 seconds 61 62 This page intentionally left blank Appendix A Network Communications Network communications are available on the Model 8681 and Model 8681 BAC The Model 8681 can communicate with a building management system through Modbus protocol The Model 8681 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
17. TSI flow LINEAR stations with pressure transducers are installed LINEAR is selected when a linear output flow station is installed Typically a thermal anemometer based flow station MAXIMUM TOP The TOP VELOCITY item is used to input the maximum 0 to 5 000 FT MIN 0 FLOW STATION VELOCITY velocity of a linear flow station output A TOP VELOCITY 0 to 25 4 m s VELOCITY must be input for the linear flow station to operate NOTE This item is disabled if a pressure based flow station is installed Lv SUPPLY FLOW MENU continued RESET CALIBRATION RESET CAL The RESET CAL menu item zeroes out the calibration adjustments for the supply flow When this menu item is entered the 8681 prompts you to verify that you want to do this Press the SELECT key to reset the calibrations and the MENU key to reject it END OF MENU 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 Hed EXHAUST FLOW MENU GENERAL EXH DCT The EXH DCT AREA item inputs the general exhaust 0 to 10 square feet 0 EXHAUST AREA duct size The duct size is needed to compute the total 0 to 0 9500 square DUCT SIZE general exhaust flow out of the laboratory This item meters requires a flow station to be mounted in each general exhaust duct The DIM does not If th
18. characters are used to program the unit A thorough description of each key is given on the next two pages User Basics 3 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 setpoint 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 is 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 permane
19. duct area HD1 DCT AREA 0 78 ft 12 inch round Fume hood duct area MIN OFFSET 100 CFM Minimum offset MAX OFFSET 500 CFM Maximum offset EXH CONFIG UNGANGED Default Value Additional menu items to program for temperature and pressure control VENT MIN SET 280 CFM 10 air changes per hour COOLING FLOW 400 CFM Required flow to cool laboratory TEMP SETP 72 F Laboratory temperature setpoint SETPOINT 0 001 in Pressure differential setpoint Sequence Of Operation Beginning scenario Laboratory is maintaining pressure control 0 001 in Temperature requirement is satisfied Fume hood sashes are down total hood exhaust is 250 CFM Supply air is 280 CFM maintain ventilation General exhaust 130 CFM calculated from below Fume hood General exhaust Offset Supply air 250 100 280 The fume hood is 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 1 000 CFM Fume hood General exhaust Offset Supply air 1 000 0 100 900 The supply air volume changes to 900 CFM 1 000 CFM hood exhaust 100 CFM offset The general exhaust is closed since no additional exhaust is needed for temperature or ventilation However the Digital Interface Module indicates the laboratory is now 0 0002 in not negative enough The AOC algorithm slowly changes the offset until pressure control
20. laboratory ACPH The temperature supply setpoint COOLING FLOW is the theoretical minimum flow required to meet cooling flow needs of the laboratory The unoccupied setpoint UNOCC SETP is the minimum flow required when the lab is not occupied All of these setpoints are configurable If the Model 8681 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 8681 continuously compares the temperature setpoint to the actual space temperature If setpoint is being maintained no changes are made If setpoint 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 begins a 3 minute time period If after the 3 minute time period the reheat valve is still fully closed the Model 86812 then gradually begins increasing the supply volume by 1 CFM second up to the COOLING FLOW setpoint The controller when controlling supply flow for cooling will not increase the supply flow above the COOLING FLOW ventilation rate If the soace temperature decreases below the setpoint the controller first reduces the supply volume Once the supply volume reaches its minimum VENT MIN SET the controller then starts a 3 minute time period If after 3 minute
21. 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 User Basics 5 Audible Alarms 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 is 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 still turns 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 outs
22. pressure setpoint is reached provided offset is between MIN OFFSET and MAX OFFSET WIRING This item requires 10000 platinum RTD to be wired to the TEMPERATURE input DIM pins 23 and 24 The temperature sensor toggles the AOC between VENT MIN SET and COOLING FLOW 0 to 30 000 CFM 0 to 14100 5 Linear based flow stations 0 to TOP VELOCITY times the duct area in square feet ft square meters m UNOCCUPIED UNOCCUPY SUPPLY FLOW SET MINIMUM 2 The UNOCCUPY SET sets minimum supply flow setpoint when the laboratory is unoccupied requires fewer air changes per hour When UNOCCUPY SET is active the VENT MIN SET and COOLING FLOW setpoints are turned off since only one minimum supply setpoint can be enabled The controller will not allow the supply air damper to be closed further than the UNOCCUPY SET setpoint If room pressure is not maintained at minimum supply flow the general exhaust damper modulates open until pressure setpoint is reached provided required offset is between MIN OFFSET and MAX OFFSET WIRING This item is enabled through RS 485 communication sends commands When the UNOCCUPY SET menu item is enabled VENT MIN SET and COOLING FLOW are disabled Disabling UNOCCUPY SET and enables VENT MIN SET and COOLING FLOW 0 to 30 000 CFM 0 to 14100 5 Linear based flow stations 0 to TOP VELOCITY times the duct area in square feet 1 square meters m H
23. reached The AOC maintains the new offset offset range is exceeded The offset will be at maximum attempting to reach pressure setpoint An alarm triggers to inform you pressure differential is not being maintained e 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 e Pressure setpoint is reached The AOC maintains the new offset offset range is exceeded The offset will be at minimum attempting to reach pressure setpoint An alarm triggers to inform you pressure differential is not being maintained e Supply air maximum is reached The alarm triggers to inform you pressure differential is not being maintained Technical Section 47 NOTE The pressure differential is slow secondary control loop The system initially starts with a calculated offset value and then slowly adjusts the offset value to maintain pressure differential Temperature Control The Model 8681 receives a temperature input from a temperature sensor 1000 Platinum RTD The Model 8681 controller maintains temperature control by 1 Controlling supply and general exhaust for ventilation and cooling 2 Controlling the reheat coil for heating The Model 8681 has three supply flow minimum setpoints The ventilation setpoint VENT MIN SET is the minimum flow volume required to meet ventilation needs of the
24. 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 TRADEMARKS TSI and TSI logo are registered trademarks of TSI Incorporated SureFlow is a trademark of TSI Incorporated LonWorks is a registered trademark of Echelon Corporation BACnet is a registered trademark of ASHRAE Microsoft is a registered trademark of Microsoft Corporation 5 HOW USE THIS MANUAL 2 2 IV PART ONE aioa 1 User 1 1 O
25. the control output signal to the supply air CONTROL SUP actuator damper or motor speed drive When this item is entered a number between 0 and 100 is OUTPUT shown on the display indicating the control output value Pressing the A V keys change the count on the display Pressing the A key increases the displayed value while pressing the W key decreases the displayed value The supply air damper or VAV box should change modulate as the number changes A count of 50 should position the damper approximately 1 2 open On units controlling variable frequency drives fan speed should increase or decrease as numbers change EXHAUST AIR CONTROL The CONTROL EXH item manually changes the control output signal to the exhaust air CONTROL EXH actuator damper or motor speed drive When this item is entered a number between 0 and 100 is OUTPUT shown the display indicating the control output value Pressing the A V keys changes the count on the display Pressing the A key increases the displayed value while pressing the W key decreases the displayed value The exhaust air damper or VAV box should change modulate as the number changes A count of 50 should position the damper approximately 1 2 open On units controlling variable frequency drives fan speed should increase or decrease as numbers change REHEAT VAVLE CONTROL CONTROL TEMP OUTPUT The CONTROL TEMP item manually changes the control output signal to the reheat valve When this ite
26. 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 Technical Section 57 58 The DIM displays two air flow values Press the W 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 SUP HIGH CAL to enter a supply flow high calibration value or Select EXH HIGH CAL to enter a general exhaust flow high calibration value The DIM displays two airflow values Press the or W 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 5 Press SELECT key to save data Hood Flow Calibration 1 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 displays two airflow values Press the or W keys to adjust the value displayed on the right to match the actual airflow which is obtained with a d
27. up Linear flow stations with a minimum output of 0 VDC do not need a SUP FLO ZERO SUPPLY FLOW SUP LOW The SUP LOW SETP menu item sets the supply damper 0 to 100 OPEN 0 OPEN LOW SETP position for supply low flow calibration CALIBRATION SETTING SUPPLY FLOW SUP HIGH The SUP HIGH SETP menu item sets the supply damper 0 to 100 OPEN 100 OPEN HIGH SETP position for the supply high flow calibration CALIBRATION SETTING 65 Hed SUPPLY FLOW MENU continued SUPPLY FLOW SUP LOW The SUP LOW CAL menu items display the currently LOW CAL measured supply flow rate and the calibrated value for CALIBRATION that supply flow The supply dampers move to the SUP LOW SETP damper position for the low calibration The calibrated supply flow can be adjusted using the A V keys to make it match a reference measurement Pressing the SELECT key saves the new calibration data SUPPLY FLOW SUP HIGH The SUP HIGH CAL menu items display the currently HIGH CAL measured supply flow rate and the calibrated value for CALIBRATION that supply flow The supply dampers move to the SP HIGH SETP damper position for the high calibration The calibrated supply flow can be adjusted using the A V keys to make it match a reference measurement Pressing the SELECT key saves the new calibration data FLOW STATION FLO STA The FLO STA TYPE item is used to select the flow station PRESSURE or PRESSURE TYPE TYPE input signal PRESSURE is selected when
28. 0 This is a system information only menu item no programming is possible Hed SYSTEM FLOW MENU continued GENERAL EXH The EXH SETPOINT menu item displays the general NONE Read only NONE EXHAUST SETPOINT exhaust flow setpoint which is calculated by the AOC value FLOW control algorithm The calculated EXH SETPOINT is a SETPOINT diagnostic item used to compare the actual EXH FLOW CALCULATED IN from FLOW CHECK MENU to the calculated flow This is a system information only menu item no programming is possible END OF The END OF MENU item informs you that the end of a MENU 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 CHECK MENU SUPPLY AIR SUP FLOW FLOW IN The SUP FLOW IN menu item displays the current NONE Read only NONE supply air flow This item is a diagnostics tool used to value compare the supply flow to a traverse of the duct work If flow error is greater than 10 calibrate 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 FLOW CHECK MENU 8 p GENERAL EXH FLOW EXHAUST IN 5 FLOW The EXH FLOW IN menu item displays the current exhaust NONE Read only NONE flow from a g
29. Controller requires minimal maintenance Periodic inspection of system components as well as an occasional pressure sensor cleaning are all that are needed to ensure that the Model 8681 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 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 aan Cover Sensor Pressure Sensor 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 dirt 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 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 a
30. ELECT value is displayed on line 2 Item HIGH ALARM Current Value 00200 HO Press W key to change the high alarm setpoint to 0 003 inches HIGH ALARM 00300 12 Part Two Press the SELECT key to save the new negative high alarm TEST setpoint SELECT Three short beeps sound indicating that the data is HIGH ALARM being saved Saving Data Immediately after the data is saved the SureFlow ALARM controller returns to the menu level displaying the HIGH ALARM menu title on the top line of the display and the menu item on the bottom line goes to step 4 Press the MENU key once return to the menu level MENU ALARM CONFIGURE Press the MENU key a second time to return to the normal operating level MENU Unit is now back in normal PRESSURE operation 00100 Technical Section 1 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 please see Software Programming for a detailed explanation This section provides the following information Complete list of menu and all menu items Gives the menu or programming nam
31. ET room pressure control can be maintained If the offset required to maintain pressure is less than the MIN OFFSET or greater the MAX OFFSET pressure control will not be maintained VENTILATION VENT MIN The VENT MIN SET item sets the ventilation supply 0 to 30 000 CFM 0 MINIMUM SET airflow setpoint This item provides a minimum supply 0 to 14100 1 5 SUPPLY FLOW airflow to meet the ventilation requirement by preventing SETPOINT the supply flow from going below the preset minimum Linear based flow flow stations 0 to TOP VELOCITY times The controller will not allow the supply air damper to be the duct area in closed further than the VENT MIN SET setpoint If room square feet ft pressure is not maintained at minimum supply flow the square meters m general exhaust damper modulates open until pressure setpoint is reached provided offset is between MIN OFFSET and MAX OFFSET Hed SETPOINTS MENU continued 019 COOLING COOLING FLOW SUPPLY FLOW SETPOINT The COOLING FLOW item sets the space cooling supply airflow setpoint 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 setpoint from a minimum ventilation rate when the space temperature is too warm If room pressure is not maintained at minimum temperature flow the general exhaust damper modulates open until
32. IN 0 FLOW STATION VELOCITY velocity of a linear flow station output A TOP VELOCITY 0 to 25 4 m s VELOCITY must be input for the linear flow station to operate NOTE This item is disabled if a pressure based flow station is installed RESET RESET CAL RESET CAL menu item zeroes out the calibration CALIBRATION adjustments for the hood flow When this menu item is entered the 8681 prompts you to verify that you want to do this Press the SELECT key to reset the calibrations and the MENU key to reject it END OF The END OF MENU item informs you that the end of a MENU 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 These menu items do not appear on SureFlow controllers provided with BACnet communications 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 thermostat to maintain laboratory temperature The overall AOC control sequence seems quite complicated initially but the Theory of Operation section breaks the sequence down into sub sequences which simplifies the total system Theory of Operat
33. Low supply flow alarm Low exhaust flow alarm Data error 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 0 0 2 inches maximum negative maximum positive High Negative Low Zero Low Positive High Negative Setpoint Negative Positive Setpoint Positive Alarm Alarm Alarm Alarm The value of each setpoint 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 setpoint and that the high alarm is a greater negative positive value than setpoint CONFIGURE MENU DISPLAYED UNITS The UNITS item selects the unit of measure that the DIM FT MIN m s H20 UNITS displays all values except calibration span These units in display for all menu items setpoints alarms flows etc GENERAL EXH The EXH CONFIG menu item determines the exhaust GANGED or UNGANGED EXHAUST DUCT CONFIG configuration If the general exhaust duct is separate from UNGANGED CONFIGURATIO the total exhaust select UNGANGED left side of Figure N 6 If the general exhaust duct is part of the total exhaust select GANGED right side of Figure 6 The correct configuration is required for the control algorithm to function correctly Airflow Airflow N Fume Hood
34. an 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 WITH RESPECT TO SELLER S BREACH OF THE IMPLIED WARRANTY AGAINST INFRINGEMENT SAID WARRANTY IS LIMITED TO CLAIMS OF DIRECT INFRINGEMENT AND EXCLUDES CLAIMS OF CONTRIBUTORY OR INDUCED INFRINGEMENTS BUYER S EXCLUSIVE REMEDY SHALL BE THE RETURN OF THE PURCHASE PRICE DISCOUNTED FOR REASONABLE WEAR AND TEAR OR AT SELLER S OPTION REPLACEMENT OF THE GOODS WITH NON INFRINGING GOODS 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 THE CASE OF SOFTWARE SELLER WILL REPAIR OR REPLACE DEFECTIVE SOFTWARE OR IF UNABLE TO DO SO WILL REFUND THE PURCHASE PRICE OF THE SOFTWARE IN NO EVENT SHALL SELLER BE LIABLE FOR LOST PROFITS OR 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
35. ariable is set to 0 8681 XRAM Variable List read only read onl Emergency Mode Emergency Mode Control 0 Leave emergency mode 1 Enter emergency mode Value returns a 2 when read Occupancy Mode 3 Occupancy mode device is in 0 Occupied 1 Unoccupied Pressure Setpoint 4 Pressure control setpoint Displayed in feet per minute Cooling Flow Setpoint setpoint in temperature mode Unoccupied 7 Minimum supply flow control Displayed in CFM Minimum Supply setpoint in unoccupied mode Flow Setpoint Flow Setpoint setpoint Minimum Exhaust Minimum exhaust flow control setpoint Flow Setpoint Ventilation 5 Minimum supply flow control Displayed in CFM Minimum Supply setpoint in normal mode Flow Setpoint Network Modbus Communications 65 8681 XRAM Variable List Occupied Mode Temperature Displayed in F setpoint Minimum offset setpoint Displayed in CFM Maximum offset setpoint Displayed in CFM 13 Low pressure alarm setpoint Displayed in feet per minute High Alarm Setpoint 14 High pressure alarm setpoint Displayed in feet per minute Occupied Temperature Setpoint Low Alarm Setpoint Minimum Supply Minimum supply flow alarm Displayed in CFM Alarm Maximum Exhaust Maximum general exhaust alarm Displayed CFM Alarm Current pressure units displayed 0 Feet per minute 1 meters per second 2 inches of 3 Pascal Unoccupied Temperature Setpoint 75 Unoccupied Mode Temperature Displa
36. as 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 55 SYSTEM FLOW MENU TOTAL SUPPLY TOT SUP The TOT SUP FLOW menu item displays the current NONE Read only NONE AIR FLOW FLOW total measured supply flow into the laboratory This is a value system information only menu item no programming is possible TOTAL TOT EXH The TOT EXH FLOW menu item displays the current NONE Read only NONE EXHAUST AIR FLOW total measured exhaust flow out of the laboratory This value FLOW item calculates total exhaust by summing EXH FLOW IN and HD1 FLOW IN and HD2 FLOW IN This is a system information only menu item no programming is possible CONTROL OFFSET The OFFSET VALUE menu item displays the actual flow NONE Read only NONE OFFSET VALUE VALUE offset being used to control the laboratory The OFFSET value VALUE is calculated by the AOC control algorithm which uses the MIN OFFSET MAX OFFSET and SETPOINT items to calculate required offset This is a system information only menu item no programming is possible SUPPLY FLOW SUP The SUP SETPOINT menu item displays the supply flow NONE Read only NONE SETPOINT SETPOINT setpoint which is calculated by the AOC control value CALCULATED algorithm The calculated SUP SETPOINT is a diagnostic item used to compare the actual TOT SUP FLOW to the calculated flow they should match within 1
37. 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 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 0 to 10 bars 5 bars Hed CONTROL MENU continued SUPPLY SUP CONT The SUP CONT DIR item determines the control signal s DIRECT or DIRECT DAMPER DIR output direction As an example if the control system REVERSE CONTROL closes the supply damper instead of opening the damper SIGNAL this option reverses the control signal to now open the DIRECTION damper EXHAUST EXH CONT The EXH CONT DIR item determines the control signal s DIRECT or DIRECT DAMPER DIR output direction As an example if the control system REVERSE CONTROL closes the exhaust damper instead of opening the SIGNAL damper this option reverses the control signal to now DIRECTION open the damper FLOW Ke VALUE Ke 0 to 1000 80 TRACKING Ti VALUE Ti 0 to 1000 Ti 200 CONTROL VALUE amp The range of values Ti VALUE is very large Poor Suggestion Before changing or Ti change the SPEED or adjust the SENSITIVITY to try to eliminate the problem The VALUE item changes the gain control c
38. 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 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 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 airflow 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 laborato
39. corporated 2010 2013 All reserved Part number 1980476 Rev LIMITATION OF WARRANTY AND LIABILITY effective June 2011 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 24 months or if less 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 and exceptions 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 Pumps are warranted for hours of operation as set forth in product or operator s manuals c 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 d 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 e 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 th
40. due to convection currents HVAC configuration or equipment used to make the measurement TSI recommends always taking the comparison measurement the exact same location 1 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 to 5 VDC linear flow stations must be zeroed upon initial system set up Linear 0 to 5 VDC flow stations do not require a zero flow to be established Calibrating Pressure Sensor Enter calibration menu see Software Programming if not familiar with key stroke 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 Menu and Menu Items section for further information 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 Technical Section 55 56 Sensor
41. e 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 setpoints 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 8681 controller menu items 14 Part Two SETPOINTS SETPOINT VENT MIN SET COOLING FLOW UNOCCUPY SET MAX SUP SET MIN EXH SET TEMP SETP UNOCC TEMP MIN OFFSET MAX OFFSET CONTROL SPEED SENSITIVITY SUP CONT DIR EXH CONT DIR Ke VALUE Ti VALUE OFFSET REHEAT SIG TEMP DIR TEMP DB TEMP TR TEMP SUPPLY FLOW SUP DCT AREA SUP FLO ZERO SUP LO SETP SUP HI SETP SUP LOW CAL SUP HIGH CAL FLO STA TYPE TOP VELOCITY RESET CAL ALARM LOW ALARM HIGH ALARM MIN SUP ALM MAX EXH ALM ALARM RESET AUDIBLE ALM ALARM DELAY ALARM RELAY MUTE TIMEOUT SYSTEM FLOW TOT SUP FLOW TOT EXH FLOW OFFSET VALUE SUP SETPOINT EXH SETPOINT EXHAUST FLOW EXH DCT AREA EXH FLO ZERO EXH LO SETP EXH HI SETP EXH LOW CAL EXH HIGH CAL FLO STA TYPE TOP VELOCITY RESET CAL CONFIGURE UNITS EXH CONFIG NET ADDRESS MAC ADDRESS ACCESS CODES FLOW CHECK SUP FLOW IN
42. e DIM displays English units area must be entered in compute duct area square feet If metric units are displayed area must be The area must be entered in square meters first calculated and then entered into the unit EXHAUST EXH FLO The EXH FLO ZERO item establishes the flow station NONE FLOW STATION ZERO zero flow point A zero or no flow point needs to be ZERO established in order to obtain a correct flow measurement output see Calibration section All pressure based flow stations need to have an EXH FLO ZERO established on initial set up Linear flow stations with a minimum output of 0 VDC not need a SUP FLO ZERO EXHAUST EXH LOW The EXH LOW SETP menu item sets the general 0 to 100 OPEN 0 OPEN FLOW LOW SETP exhaust damper position for general exhaust low flow CALIBRATION calibration SETTING EXHAUST EXH HIGH The EXH HIGH SETP menu item sets the general 0 to 100 100 OPEN FLOW HIGH SETP exhaust damper position for the general exhaust high CALIBRATION flow calibration SETTING EXHAUST FLOW MENU continued EXHAUST FLOW LOW CALIBRATION EXH LOW CAL The EXH LOW CAL menu items display the currently measured general exhaust flow rate and the calibrated value for that general exhaust flow The exhaust dampers move to the EXH LOW SETP damper position for the low calibration The calibrated general exhaust can be adjusted using the keys to make it match a reference measuremen
43. ed SETPOINTS MENU continued MAXIMUM MAX SUP The MAX SUP SET item sets the maximum supply air 0 to 30 000 CFM OFF SUPPLY FLOW SET flow into the laboratory The controller will not allow the 0 to 14100 1 5 SETPOINT supply air damper to open further than the MAX SUP SET flow setpoint Linear based flow stations 0 to TOP NOTE The laboratory may not hold pressure setpoint VELOCITY times when supply air is limited the duct area in square feet ft square meters m MINIMUM MIN EXH The MIN EXH SET item sets the minimum general 0 to 30 000 CFM OFF EXHAUST SET exhaust air flow out of the laboratory The controller will 0 to 14100 1 5 FLOW not allow the general exhaust air damper to close further SETPOINT than the MIN EXH SET flow setpoint Linear based flow stations 0 to TOP NOTE This item requires a TSI compatible flow station VELOCITY times and control damper to be mounted in the general the duct area exhaust duct square feet ft square meters m SPACE TEMP SETP TEMP item sets the temperature setpoint of 50 F to 85 F 68 F TEMPERATUR the space The SureFlow controller maintains the E SETPOINT temperature setpoint under normal operating conditions WIRING The 10000 platinum RTD temperature sensor is connected to the temp input pins 23 amp 24 DIM The temperature sensor signal is continuously monitored by the AOC 019 61 SETPOINTS MENU continued
44. ence will not allow access to the menu Key 1 2 ACCESS CODE Emergency Mute Mute Menu Aux 75 76 This page intentionally left blank Appendix D UNDERSTANDING ACCELERATED TSI Incorporated Visit our website www tsi com for more information USA Tel 1 800 874 2811 India Tel 91 80 67877200 UK Tel 44 149 4 459200 China Tel 86 10 8251 6588 France Tel 33 4 91 11 87 64 Singapore Tel 65 6595 6388 Germany Tel 49 241 523030 P N 1980476 Rev E 2013 TSI Incorporated Printed in U S A
45. eneral exhaust This item is a diagnostics tool value used to compare the general exhaust flow to a traverse of the duct work If flow error is greater than 10 calibrate 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 FUME HOOD HD1 FLOW The HD FLOW IN menu item displays the current NONE Read only NONE EXHAUST IN exhaust flow from a fume hood This item is a diagnostics value FLOW HD2 FLOW tool to compare the hood flow reading to a traverse of the IN duct work If flow reading and traverse match within 10 no change is needed If flow error is greater than 10 calibrate 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 END OF The END OF MENU item informs you that the end of a MENU 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 These menu items do not appear on SureFlow controllers with BACnet communications 96 Hed DIAGNOSTICS MENU SUPPLY AIR CONTROL The CONTROL SUP item manually changes
46. es not control the offset fume hood or maintained fume hood general exhaust 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 SUP DCT EXH DCT AREA HD1 DCT AREA MIN OFFSET AREA EXH FLO ZERO HD2 DCT AREA MAX OFFSET SUP FLO FLO STA TYPE HD1 FLO ZERO ZERO TOP VELOCITY HD2 FLO ZERO FLO STA TYPE EXH LOW SETP FLO STA TYPE TOP EXH HIGH SETP TOP VELOCITY VELOCITY EXH LOW CAL HD1 LOW CAL SUP LOW EXH HIGH CAL HD1 HIGH CAL SETP HD2 LOW CAL SUP HIGH HD2 HIGH CAL SETP SUP LOW CAL SUP 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 TEMP MIN SET and TEMP SETP Pressure The pressure differential value SETPOINT 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 Technical Section 49 Programming Example The laboratory shown is Figure 7 is being initially setup The required HVAC information is below the figure Flow Station 3 places Damper Actuator 3 places Figure 7 Laboratory Setup Example Laboratory Design 50 Laboratory size 12 14 10 1 680 ft 5 foot fume h
47. fy that you want to do this Press the SELECT key to reset the calibrations and the MENU key to reject it END OF The END OF MENU item informs you that the end of a MENU 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 These menu items do not appear on SureFlow controllers provided with BACnet communications FUME HOOD HD1 DCT The HD DCT AREA item inputs the fume hood exhaust to 10 square feet EXHAUST AREA duct size The duct size is needed to compute the flow 0 to 0 9500 square DUCT SIZE out of the fume hood This item requires a flow station to meters and be mounted in each fume hood exhaust duct HD2 DCT If the DIM displays English units area must be entered in The DIM does square feet If metric units are displayed area must compute duct area entered in square meters The area must be first calculated and then entered into the unit FUME HOOD HD1 FLO The HD FLO ZERO item establishes the flow station NONE FLOW STATION ZERO zero flow point A zero or no flow point needs to be ZERO established in order to obtain a correct flow measurement output see Calibration section HD2 FLOW ZERO All pressure based flow stations need to have a HD FLO ZERO established on initial set up Linear flow stations with a minimum output of 0 t
48. ight 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 changes from STANDARD STANDARD NORMAL to read ALARM states type of alarm low pressure high pressure flow When programming the unit the display changes and now shows menus menu items and current value of the item depending on the specific programming function being performed NOTE The system controls 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
49. ion The AOC control system requires the following measurement inputs to function correctly e General exhaust flow measured with a flow station if general exhaust is installed e Fume hood exhaust flow measured with a flow station e Supply air flow measured with a flow station e Temperature measured with a thermostat if temperature is incorporated into sequence e Pressure differential with a TSI pressure sensor if pressure is incorporated into sequence Laboratory Air Balance Laboratory air balance is maintained by measuring the 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 ata 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 pressure is at setpoint the control algorithm does nothing If pressure is not at setpoint 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 e Pressure setpoint is
50. is maintained In this case the offset changes to 200 CFM which decreases the supply volume by 100 CFM The additional offset maintains the pressure differential at 0 001 in setpoint Fume hood General exhaust Offset Supply air 1 000 0 200 800 Technical Section 51 The hood is shut after the experiments are loaded so the initial conditions prevail Fume hood General exhaust Offset Supply air 250 130 100 280 An oven is turned on and the laboratory is getting warm The thermostat sends the AOC a signal to switch to temperature minimum TEMP MIN SET This increases the supply air to 400 CFM The general exhaust air must also increase damper opens to maintain flow balance Fume hood General exhaust Offset Supply air 250 250 100 400 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 confirms all hardware is performing correctly The checkout procedure is not difficult and catches 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 take place The wiring should be very closely checked to verif
51. m is entered a number between 0 and 100 is shown on the display indicating the control output value Pressing the keys changes the count on the display Pressing the key increases the displayed value while pressing the W key decreases the displayed value The reheat control valve should modulate as the number changes A count of 50 should position the valve approximately 1 2 open DIAGNOSTICS MENU continued 019 PRESSURE SENSOR The SENSOR INPUT item verifies that the DIM is receiving a signal from the pressure sensor When SENSOR INPUT this item is entered a voltage is indicated on the display The exact voltage displayed is relatively SIGNAL CHECK unimportant It is more important that the voltage is changing which indicates the sensor is working correctly 0 volts represents a negative pressure of 0 2 inches 5 volts represents 0 pressure 10 volts represents a positive pressure of 0 2 inches PRESSURE SENSOR The SENSOR STAT item verifies that the RS 485 communications between the pressure sensor and SENSOR STAT DIM is working correctly Pressure sensor error messages do not display on DIM except when COMMUNICATION SENSOR STAT item is selected This item displays NORMAL if communications are established CHECK correctly If problems exist one of four error messages display COMM ERROR DIM cannot communicate with sensor Check all wiring and pressure sensor address Address must be 1
52. me 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 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 O 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 OYes Networking Options Router Clause 6 List all routing configurations ARCNET Ethernet Ethernet MS TP etc O Annex H BACnet Tunneling Router over IP BACnet IP Broadcast Management Device 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 150 8859 1 150 10646 UCS 2 150 10646 UCS 4 O JIS 6226 If this product is communication gateway describe types of non BACnet equipment networks s that the gateway supports Not Applicable 68 Appendix B Model 8681 BACnet MS TP Object Set
53. mizes the negative pressure Conversely if the room is under positive room pressure control the emergency mode maximizes the positive pressure Pressing the EMERGENCY key causes 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 controller has visual red light and audible alarms to inform you of changing conditions The alarm levels setpoints are determined by administrative personnel Industrial Hygienists or the facilities group depending on the organization The alarms audible and visual activate whenever the preset alarm level is reached Depending on the SureFlow controller items installed programmed alarms 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 sound Example The low alarm is programmed to activate when the room pressure reaches 0 001 inches When the room pressure drops below 0 001 inches 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 Visual Alarm Operation The red light on the front of the unit indicates an alarm condition The red
54. nt Current Offset Current offset value Displayed in CFM Value Status Index 12 Status of SureFlow device Normal Alarm Low Pressure Alarm High Pressure Alarm Max Exhaust Alarm Min Supply Data Error Emergency Mode Supply Open Current supply damper position 0 to 100 is displayed position Open valve position Current 19 Current temperature control Displayed in F Temperature setpoint Setpoint 64 Appendix B EXAMPLE of 04 Read Input Registers function format This example read variable addresses 0 and 1 Velocity and Pressure from 8681 QUERY RESPONSE Field Name Hex Field Name Hex Slave Address 01 Slave Address 01 Function 04 Function 04 Starting Address Hi 00 Byte Count 04 Starting Address Lo 00 Data Hi 00 No Of Points Hi 00 Data Lo 64 100 ft min No Of Points Lo 02 Data Hi Addr1 00 Error Check CRC Data Lo 59 00089 H20 Error Check CRC XRAM Variables These variables can be read using Modbus command 03 Read Holding Registers They can be written to using Modbus command 16 Preset Multiple Regs Many of these variables are the same menu items that are configured from the SureFlow controller keypad The calibration and control items are not accessible from the DDC system This is for safety reasons since each room is individually setup for maximum performance TSI offers a number of different models so if a feature is not available on a unit the v
55. ntly turned off see AUDIBLE ALM AUX Key The AUX key is active only in specialty applications and is not used on the standard SureFlow controller If the AUX key is used a separate manual supplement explains 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 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 saves the data and exits you out of the menu item 4 Part One Keys 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 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 maxi
56. o 5 VDC do not need a HD FLO ZERO MINIMUM MIN HD1 The MIN HD FLOW menu items adjust the minimum flow HOOD FLOW value for each fume hood input Use this menu item if the FLOWS fume hood flow measurements too low when the sash is closed MIN HD2 FLOW HOOD LOW HD1 LOW The HD LOW CAL menu items display the currently CALIBRATION CAL measured fume hood flow rate and the calibrated value POINTS ana for that fume hood flow The calibrated hood flow can be adjusted using the keys to make it match HD2 LOW reference measurement Pressing the SELECT key saves the new calibration data Hed HOOD FLOW MENU VARE HOOD HIGH HD1 HIGH The HD HIGH CAL menu items display the currently CALIBRATION CAL measured fume hood flow rate and the calibrated value POINTS for that fume hood flow The calibrated hood flow can be d adjusted using the A V keys to make it match a HD2 HIGH reference measurement Pressing the SELECT key saves CAL the new calibration data FLOW STATION FLO STA The FLO STA TYPE item is used to select the flow station PRESSURE or PRESSURE TYPE TYPE input signal PRESSURE is selected when TSI flow LINEAR stations with pressure transducers are installed LINEAR is selected when a linear output flow station is installed 0 to 5 VDC or 0 to 10 VDC Typically a thermal anemometer based flow station MAXIMUM TOP The TOP VELOCITY item is used to input the maximum 0 to 5 000 FT M
57. o reset the controller to its factory defaults Pressing the MENU key before the SELECT key exits out of the menu item WARNING If YES is selected the Model 8681 resets all menu items to their factory default settings The controller will have to be reprogrammed and recalibrated after this operation is completed END OF MENU 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 SUPPLY FLOW MENU 019 SUPPLY AIR SUP DCT The SUP DCT AREA item inputs the supply airexhaust to 10 square feet 0 DUCT SIZE AREA duct size The duct size is needed to compute the supply 0 to 0 9500 square air flow into the laboratory This item requires a flow meters station to be mounted in each supply duct The DIM does If the DIM displays English units area must be entered in compute duct area square feet If metric units are displayed area must be The area must be entered in square meters first calculated and then entered into the unit SUPPLY FLOW SUP FLO The SUP FLO ZERO item establishes the flow station NONE STATION ZERO ZERO 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 based flow stations need to have a SUP FLO ZERO established on initial set
58. oefficient 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 gain control coefficient may need adjusting Decreasing Kc slows the control system down which increases stability Increasing will increase the control system which may cause system instability control occurs if values are more than twice or less than 1 2 the default value 019 CONTROL MENU continued FLOW Ke VALUE The Ti VALUE item changes the integral control TRACKING Ti VALUE coefficient of the primary control loop flow tracking loop CONTROL When this item is entered a value for Ti is indicated on VALUE amp the display If the AOC is not controlling correctly the unit Ti VALUE may have an inappropriate integral control coefficient continued Increasing Ti slows the control system which increases stability Decreasing Ti increases the control system speed which may cause system instability ADAPTIVE OFFSET 0 to 1000 200 OFFSET CONTROL The range of values VALUE is very large Poor control occurs if values are more than twice or less than 1 2 the default value The 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 i
59. of the ALARM RELAY status NOTE Pins 13 14 Alarm relay contacts configurable for pressure or flow alarms Le Hed ALARM MENU continued MUTE MUTE The MUTE TIMEOUT determines the length of time the 5 to 30 MINUTES 5 MINUTES TIMEOUT TIMEOUT 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 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 END OF The END OF MENU item informs you that the end of a MENU 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 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 alarms to be programmed within 20 ft min 0 00028 in at 0 001 in of the control setpoint Example The control SETPOINT is set at 0 001 The LOW ALARM setpoint cannot be set higher than 0 00072 in Conversely the HIGH ALARM setpoint cannot be set lower than 0 00128 2 The minimum flow alarms MIN SUP ALM MIN EXH ALM must be programmed to be at least
60. ogrammed 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 section lists all of the software items available to program and change The items are grouped by menu which means all setpoints are in one menu alarm items in another etc The menu items and all related information are listed in table format and include 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 stati
61. on transducer The Maintenance and Repair Parts 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 key stroke 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 Technical Section 9 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 changes how the unit functions so thoroughly review the items to be changed MUTE A TEST RESET SELECT Figure 4 Programming Keys MENU Key The MENU key has three functions 1 MENU key is used to gain access to the menus when the unit is in the normal operating mode Pressing the key once exits the normal operating mode and enters the programming mode
62. ood 250CFMmin 1 000 CFM max Flow offset Ventilation setpoint 100 500 280 CFM ACPH 10 Supply Cooling Volume 400 CFM Pressure differential 0 001 in Temperature setpoint 72 F Value supplied by laboratory designer Room Pressure Control System 1 2 Model 8681 Adaptive Offset Control System mounted in the laboratory A through the wall pressure sensor mounted between the corridor referenced space and laboratory controlled space Damper pressure dependent VAV box or venturi valve with actuator assembly mounted in supply air duct s Damper pressure dependent VAV box or venturi valve with actuator assembly mounted in exhaust air duct Flow station mounted in supply air duct Required for non venturi valve applications only Flow station mounted in general exhaust air duct Required for non venturi valve applications only Flow station mounted in fume hood exhaust duct Required for non venturi valve applications only Part Two Temperature Control System 1 Temperature Sensor 10000 RTD mounted in the laboratory 2 Reheat coil mounted in supply air duct s Fume Hood Control System 1 Independent SureFlow VAV Face Velocity Control system Based on the preceding information and knowing duct sizes the following required menu items can be programmed SUP DCT AREA 1 0 2 12 x 12 Supply duct area EXH DCT AREA 0 55 ft 10 inch round General exhaust
63. oom 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 controller 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 2 Part One 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 Red 2 Line Alarm Digital Display Light Green Keys Safe Light 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 l
64. or cutoff flow in duct Flow station must have no flow going past the sensor Enter menu item that corresponds to flow station location Hood flow Exhaust Flow or Supply flow Select HD1 FLO ZERO or HD2 FLO ZERO to take a fume hood flow station zero or Select EXH FLO ZERO to take a general exhaust flow station zero or Select SUP FLO ZERO to take a supply 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 2 Point Flow Calibration Supply and General Exhaust Flow Calibration 1 2 Enter menu that corresponds to flow calibration Supply Flow Exhaust Flow Select SUP LOW SETP to enter a supply flow low calibration setpoint or Select EXH LOW SETP to enter a general exhaust flow low calibration setpoint The DIM displays a value between 0 OPEN and 100 OPEN Press the or 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 Select SUP HIGH SETP to enter a supply flow low calibration setpoint or Select EXH HIGH SETP to enter a general exhaust flow low calibration setpoint The DIM displays a value between 0 OPEN and 100 OPEN Press the or keys to adjust the value displayed and
65. ositive 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 User Basics 1 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 the pressure is inadequate red alarm light and audible alarm turn on The SureFlow controller consists of two pieces a pressure sensor and Digital Interface Module DIM Adaptive Offset Controller AOC The AOC is internally part of the DIM module The components are typically located as follows pressure sensor above the laboratory entrance DIM is mounted close to the entrance to the laboratory The pressure sensor continuously measures the room pressure and provides room pressure information to the DIM AOC The DIM AOC continuously reports the room pressure and activates the alarms when necessary The DIM controls the supply and exhaust dampers to maintain the pressure differential The DIM 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 r
66. perator 3 ALANIS 5 Betore Calling 7 PART TWO 9 Technical Section 9 Software 9 Menu Menu 14 See ae tees addan 47 Calibration aoa od eee say ede OE 55 Maintenance and Repair 59 61 adie 61 APPENDIX 63 Network Communications 63 Modbus 63 8681 BACnet MS TP Protocol Implementation Conformance 67 Model 8681 BAC BACnet MS TP Object 69 APPENDIX 71 Wiring 71 APPENDIX r aa T r abatas 75 ACCESS as el pisces ie Meld ee 75 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
67. pparatus abruptly impacts the sensor Technical Section 59 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 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 800776 8681 Digital Interface Module or Adaptive Offset Controller 868128 8681 BAC Digital Interface Module Adaptive Offset Controller 800326 60 Part Two Specifications Dim and AOC Module Display Range Resolution Display Update Inputs type Flow Inputs Tempe rature Input Outputs Alarm Contact Supply Exhaust Control Control General Operating Temperature Input P Dim Dimensions Dim Weight Pressure Sensor Tempe
68. r should have rotated either 45 or 90 degrees depending on actuator installed CHECK Control output temperature Enter CONTROL TEMP menu item in diagnostics menu A number between 0 and 255 is displayed Press the A V keys until either 0 or 255 shows on the display Note the position of the reheat valve If display reads 0 press the A key until 255 is shown on display If display reads 255 press W key until 0 is shown on display Note the position of the reheat valve The valve should have rotated either 45 or 90 degrees depending on actuator installed CHECK Sensor input Enter SENSOR INPUT menu item in diagnostics menu A voltage between 0 and 10 volts DC is 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 voltage changes the sensor is functioning correctly If voltage doesn t change proceed to CHECK Sensor status Technical Section 53 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 When this item is entered a temperature
69. re that chemical vapors cannot diffuse outside the laboratory complying with requirements in NFPA 45 2000 and ANSI 29 5 2003 The SureFlow controller Model 8681 also controls the temperature of the laboratory space by modulating reheat and the supply air volume Optionally a room pressure sensor can be connected to the SureFlow Model 8681 controller to correct 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 Network Modbus Communications 67 Standard Object Types Supported 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 Present_Value Inactive_ Text Enumerated Multi state No No State_Text Input Multi state No No State_ Text Present_Value Value Unsigned Int Device Object No No Object Na
70. ry 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 T X lt lt Room 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 p
71. s the supply flow is still at the VENT MIN SET flow rate the controller begins 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 8681 overrides ventilation or temperature setpoints to modulate supply for pressurization control Temperature is then controlled by the reheat valve in this sequence The control output items in the DIAGNOSTICS menu shows 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 Part Two 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 is at General exhaust is Independent control loop Programmed minimum closed or at minimum by fume hood controller by user User position unless position except when maintains face velocity programs additional supply air is at minimum Hood exhaust flow is minimum and replacement air position and pressure monitored by AOC The maximum is required control cannot be AOC do
72. saving data Press the MENU key to exit current menu and return to main menu 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 Technical Section 11 Programming Example The following example demonstrates the keystroke sequence explained above In this example the high alarm setpoint is changed from 0 002 inches to 0 003 inches Unit is in normal operation scrolling room pressure flows etc PRESSURE Pressure is shown in this case 00100 Press the MENU key to gain access to the menus The first two 2 menu choices are displayed SETPOINTS ALARM Press the key once Blinking cursor should be on of Alarm TEST Press the SELECT key to access the ALARM menu SELECT NOTE Blinking cursor must be on A in Alarm Line 1 shows menu selected ALARM Line 2 shows first menu item LOW ALARM Press the key once HIGH ALARM is shown on display Menu selected ALARM HIGH ALARM Press the SELECT key to access the high alarm setpoint The item TEST name HIGH ALARM is displayed on line 1 and the item s current S
73. t exhaust if controlling exhaust air e Control output reheat if controlling reheat valve e Sensor input if pressure sensor is installed e Sensor status if pressure sensor installed e Temperature input e General exhaust flow station e Supply flow station e Fume hood flow station 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 255 is displayed Press the A F keys until either 0 or 255 shows on the display Note the position of the supply air control damper If display reads 0 press the key until 255 is shown on display If display reads 255 press W 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 255 is displayed Press the A F keys until either 0 or 255 shows on the display Note the position of the general exhaust control damper If display reads 0 press the A key until 255 is shown on display If display reads 255 press W key until 0 is shown on display Note the position of the general exhaust damper The dampe
74. t Pressing the SELECT key saves the new calibration data EXHAUST FLOW HIGH CALIBRATION EXH HIGH CAL The EXH HIGH CAL menu items display the currently measured general exhaust flow rate and the calibrated value for that general exhaust flow The exhaust dampers moves to the EXH HIGH SETP damper position for the high calibration The calibrated general exhaust flow can be adjusted using the keys to make it match a reference measurement Pressing the SELECT key saves the new calibration data FLOW STATION TYPE FLO STA TYPE PRESSURE or LINEAR 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 or 0 10 VDC Typically a thermal anemometer based flow station PRESSURE MAXIMUM FLOW STATION VELOCITY TOP VELOCITY The TOP VELOCITY item is used to input the maximum velocity of a linear flow station output A TOP VELOCITY must be input for the linear flow station to operate 0 to 5 000 FT MIN 0 0 to 25 4 m s NOTE This item is disabled if a pressure based flow station is installed Hed EXHAUST FLOW MENU continued RESET RESET CAL The RESET CAL menu item zeroes out the calibration CALIBRATION adjustments for the general exhaust flow When this menu item is entered the 8681 prompts you to veri
75. tanding service Please have the following information available prior to contacting your authorized TSI Manufacturer s Representative or TSI Model number of unit 8681 ___ Software revision level Facility where unit is installed First two 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 amp Customer Service Sales amp Customer Service 800 874 2811 651 490 2811 001 651 490 2811 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 User Basics 7 This page intentionally left blank Part One PART TWO Technical Section The AOC is ready to use after being properly installed Please note that the AOC is part of the DIM module and is not a separate component Where AOC is written the overall control sequence is being discussed When DIM is written the manual is referring to programming the unit or viewing what is on the display The pressure sensor is factory calibrated prior to shipping and should not need adjustment The flow stations need a zero point and or a span programmed prior to using them The Digital Interface Module DIM is pr
76. tem 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 slows the pressure control loop down while increasing Kc increases the pressure control loop speed TEMPERATUR REHEAT SIG REHEAT SIG item switches the supply and exhaust 0 to 10 VDC or to 10 VDC E OUTPUT control outputs from 0 to 10 VDC to 4 to 20 mA 4 to 20 mA SIGNAL Hed CONTROL MENU continued TEMPERATUR TEMP DIR The TEMP DIR item determines the control signal s DIRECT OR DIRECT E CONTROL output direction As an example If the control system REVERSE DIRECTION closes the reheat valve instead of opening this valve this option reverses the control signal to now open the valve TEMPERATUR TEMP DB The TEMP DB item determines the controller s 0 0 F to 1 0 F 0 1 F E SETPOINT temperature control deadband which is defined as the DEAD BAND temperature range above and below the temperature setpoint TEMP SETP or UNOCC TEMP where the controller will not take corrective action Temperature F 0 15 30 45 60 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 04 019 Le CONTROL MENU contin
77. the 0 to 0 19500 ALARM room pressure rises above the HIGH ALARM setpoint to 0 19500 MINIMUM MIN SUP The MIN SUP ALM item sets the supply flow alarm 0 to 30 000 CFM OFF SUPPLY FLOW ALM setpoint A minimum flow alarm is defined as when the 0 to 14100 1 5 ALARM supply duct flow is less than the MIN SUP ALM setpoint Linear based flow NOTE Supply air duct size SUP DCT AREA Supply stations 0 to TOP Flow menu must be entered before MIN SUP VELOCITY times ALM can be accessed Actual total supply air the supply duct area flow is found in TOT SUP FLOW menu item in square feet 12 system flow menu square meters m WIRING This item is disabled when the UNOCCUPY SET is enabled AUX key is pressed or the RS 485 communications sends a command MAXIMUM MAX EXH The MAX EXH ALM item sets the general exhaust duct s 0 to 30 000 CFM OFF EXHAUST ALM flow alarm setpoint A maximum flow alarm is defined as 0 to 14100 1 5 FLOW ALARM when the general exhaust duct flow is greater than the MAX EXH ALM setpoint Linear based flow stations 0 to TOP NOTE General exhaust air duct size EXH DCT AREA VELOCITY times Exhaust Flow menu must be entered before the supply duct area MAX EXH ALM can be accessed Actual total in square feet 2 exhaust air flow is found in TOT EXH FLOW square meters menu item system flow menu Hed ALARM MENU continued 019 ALARM RESET ALARM The
78. the Model 8681 adaptive offset room pressure controllers This document provides the technical information needed to communicate between the host DDC system and the Model 8681 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 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 speeds 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 d
79. 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 scrolls through the values faster than if arrow key is pressed and released 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 2 Press the MENU key to access the main menu Use A keys to scroll through the menu choices The blinking cursor needs to be on the first letter of the menu you want to access Press the SELECT key to access chosen menu The menu selected is now displayed on line one and the first menu item is displayed on line 2 Use A F 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 C Appendix C may have been removed from the manual for security reasons 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 Use the A keys to change item value Save the new value by pressing the SELECT key pressing the MENU key exits out of menu function without
80. uct 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 The DIM displays two airflow values Press the or W 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 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 SUP LOW CAL must be completed before SUP HIGH CAL It is acceptable to complete all low flow calibrations before completing their associated high flow calibrations To continue with the previous example HD1 LOW CAL and HD2 LOW CAL could both be completed before completing HD1 HIGH CAL and HD2 HIGH CAL Fume hood face velocity calibration must be completed before beginning fume hood flow calibration Part Two Maintenance and Repair Parts The Model 8681 SureFlow Adaptive Offset
81. ue to internal Model 8681 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 H20 The room pressure control setpoints and 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 6 2 10 Velocity in ft min 836 RAM Variables RAM variables use the Modbus command 04 Read Input Registers RAM variables are read only variables that correspond to what is shown on the Digital Interface Module DIM display TSI offers a number of different models so if a feature is not available on a unit the variable is set to 0 63 8681 RAM Variable List Room Velocity Room Pressure Velocity of room pressure Displayed in ft min ____ 1 Displayed in inches Host DDC system must divide value by 100 000 to report pressure correctly a Temperature supply duct flow station General Exhaust 4 Flow measured by flow station Displayed in CFM Flow Rate connected to general exhaust input Rate connected to hood input 1 zer ta Rate connected to hood input 2 ventilation Flow Rate Setpoint Minimum Supply Flow Setpoint General Exhaust 10 Current general exhaust Displayed in CFM Flow Setpoint setpoi
82. ued TEMPERATUR TEMP TR The TEMP TR item determines the controller s 2 0 F to 20 0 F 3 0 F E SETPOINT temperature control throttling range which is defined as THROTTLING the temperature range for the controller to fully open and RANGE fully close the reheat valve 110 3 F Throttling 100 90 80 70 60 64 65 66 67 68 69 70 71 72 73 74 75 76 If TEMP is to 3 0 and the TEMP 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 Hed CONTROL MENU continued 1 to 10000 sec 2400 sec TEMPERATUR _ TEMPTI E SETPONT INTEGRAL VALUE Suggestion Before changing TEMP TI adjust the TEMP DB or adjust the TEMP TR to try to eliminate the problem The TEMP item is used to read and change the integral control coefficient When this item is entered a value for TEMP TI is indicated on the display If the SureFlow controller is not controlling correctly the unit may have an inappropriate integral control coefficient Increasing TEMP TI slows the control system which increases stability Decreasing TEMP speeds the control system which may cause system instability END OF The END OF MENU item informs you that the end of a MENU menu h
83. via a 1000Q platinum RTD is indicated on the display The exact temperature displayed is relatively unimportant It is more important that the temperature is changing which indicates the sensor is working correctly CHECK Flow station The Flow Check menu lists all the flow stations that can be installed Check each flow station menu item that has flow station attached Enter ___ FLOW IN menu item and the actual flow is displayed If the flow is correct no changes need to be made If flow is incorrect adjust the corresponding ___ DCT AREA until actual flow matches flow station reading If unit passed all checks the mechanical components are physically working 54 Part Two Calibration The calibration section explains how to calibrate and set the elevation for the AOC pressure sensor and how to zero 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 SureFlow pressure sensor calibration may be required to eliminate errors
84. whether an access ON or OFF code pass code is required to enter the menu The ACCESS CODES item prevents unauthorized access to a menu If the ACCESS CODES is ON a code is required before the menu can be entered Conversely if the ACCESS CODES is OFF no code is required to enter the menu OFF END OF MENU 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 MAC ADDRESS Menu replaces the Network Address Menu Item SureFlow controllers provided with the BACnet MSTP board CALIBRATION MENU TEMPERATURE TEMP CAL The TEMP CAL is used to enter the actual space 50 F to 85 F CALIBRATION temperature This adjustment offsets the temperature sensor curve SENSOR SPAN SENSOR The SENSOR SPAN item is used to match or calibrate NONE 0 SPAN the TSI pressure sensor velocity sensors to the average room pressure velocity as measured by a portable air velocity meter NOTE The pressure sensor is factory calibrated No initial adjustment should be necessary ALTITUDE ELEVATION ELEVATION item is used to enter the elevation of 0 to 10 000 feet 0 the building above sea level This item has a range of 0 above sea level to 10 000 feet in 1 000 foot increments The pressure value needs to be corrected due to changes in air density at different elevations END
85. y 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 B 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 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 shows 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 52 Part Two If SELF TEST PASSED was displayed proceed to check individual components Enter Diagnostics and Flow Check Menu to check the following e Control output supply if controlling supply air e Control outpu
86. yed in F setpoint EXAMPLE of 16 10 Hex Preset Multiple Regs function format This example changes the setpoint to 100 ft min 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 04 Starting Address Lo 04 No Of Registers Hi 00 No of Registers Hi 00 No Of Registers Lo 01 No of Registers Lo 01 Data Value High 00 Error Check CRC Data Value Low 64 Error Check CRC Example of 03 Read Holding Registers function format This example reads the minimum ventilation setpoint and the minimum temperature setpoint 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 05 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 BO 1200 CFM Error Check CRC 66 Appendix B 8681 BACnet MS TP Protocol Implementation Conformance Statement Date April 27 2007 Vendor Name TSI Inc Product Name SUREFLOW Adaptive Offset Controller Product Model Number 8681 BAC Applications Software Version 1 0 Firmware Revision 1 0 BACnet Protocol Revision 2 Product Description TSI SureFlow Room Pressure Controls are designed to maintain more exhaust from a laboratory than is supplied to it This negative air balance helps ensu

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