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TSI Instruments SUREFLOW 8682, Operation And Service Manual

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TSI Instruments SUREFLOW 8682 Operation And Service Manual Download Page 31

 

 

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CONTROL MENU 

(continued)

 

MENU ITEM 

SOFTWARE 

NAME ITEM 

DESCRIPTION

 

ITEM RANGE

 

DEFAULT 

VALUE 

Kc VALUE 
Ti VALUE 

Kc VALUE 
Ti VALUE 
 
 
 

WARNING:

 The 

Kc VALUE 

and

 Ti VALUE

 allow you to 

manually change the primary PID control loop 
variables. 

DO NOT CHANGE THESE 

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

Contact TSI for assistance in 

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

Suggestion: 

Before changing Kc or Ti, change the 

SPEED

 

or adjust the 

SENSITIVITY

 to try to eliminate 

the problem.  

 
The 

Kc VALUE

 item changes the gain control coefficient of the 

primary control loop (flow tracking loop). When this item is 
entered, a value for Kc is indicated on the display. If the AOC is 
not controlling correctly, the Kc gain control coefficient may 
need adjusting. Decreasing Kc

 

will slow the control system 

down, which will increase stability. Increasing Kc will increase 
the control system which may cause system instability. 
 
The 

Ti VALUE

 item changes the integral control coefficient of 

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

 

Kc = 0–1000 

Ti = 0-1000  

 

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

 

 

Kc = 80 

Ti = 200

 

Summary of Contents for SUREFLOW 8682

Page 1: ...ENERGY AND COMFORT Critical Environments Monitors Controllers Models 8682 8682 BAC SUREFLOW Adaptive Offset Controller Operation and Service Manual P N 1980483 Revision D January 2008 ...

Page 2: ......

Page 3: ...D January 2008 U S AND CANADA OTHER COUNTRIES Sales Customer Service Sales Customer Service 800 874 2811 651 490 2811 001 651 490 2811 Fax Fax 651 490 3824 001 651 490 3824 SHIP MAIL TO E MAIL TSI Incorporated answers tsi com ATTN Customer Service 500 Cardigan Road WEB SITE Shoreview MN 55126 www tsi com USA ...

Page 4: ...O OTHER EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR PARTICULAR PURPOSE OR MERCHANTABILITY IS MADE TO THE EXTENT PERMITTED BY LAW THE EXCLUSIVE REMEDY OF THE USER OR BUYER AND THE LIMIT OF SELLER S LIABILITY FOR ANY AND ALL LOSSES INJURIES OR DAMAGES CONCERNING THE GOODS INCLUDING CLAIMS BASED ON CONTRACT NEGLIGENCE TORT STRICT LIABILITY OR OTHERWISE SHALL BE THE RETURN OF GOODS TO SELLER AND THE RE...

Page 5: ...ration 58 Maintenance and Repair Parts 62 Troubleshooting Section 64 APPENDIX A 73 Specifications 73 APPENDIX B 75 Network Communications 75 Modbus Communications 75 N2 Communications Description of Variables 79 LonWorks Node Object 81 LonWorks Object 83 8682 BACnet MS TP Protocol Implementation Conformance Statement 84 Model 8682 BAC BACnet MS TP Object Set 86 APPENDIX C 89 Wiring Information 89 ...

Page 6: ...REFLOW controller operates Part Two describes the technical aspects of the product which includes operation calibration configuration and maintenance Part Two should be read by personnel programming or maintaining the unit TSI recommends thoroughly reading this manual before changing any software items NOTE This operation and service manual assumes proper SUREFLOW controller installation Refer to ...

Page 7: ...ifferential 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 ha...

Page 8: ...ntroller that is continuously measuring reporting and controlling room pressure Useful User Information The DIM has a green light and red light to indicate room pressure status The green light is on when the room has proper room pressure The red light comes on when an alarm condition exists Sliding the door panel to the right reveals a digital display and keypad Figure 2 The display shows detailed...

Page 9: ...ndicates information about room pressure If an alarm condition occurs the display will change from STANDARD STANDARD NORMAL to read ALARM will state type of alarm low pressure high pressure flow When programming the unit the display will change and now show menus menu items and current value of the item depending on the specific programming function being performed NOTE The AOC system will control...

Page 10: ...ck on if the alarm condition is still present NOTE You can program the audible alarm to be permanently turned off see AUDIBLE ALM AUX Key The AUX key is active only in specialty applications and is not used on the standard SUREFLOW If the AUX key is used a separate manual supplement will explain the AUX key function Programming Keys Gray with Blue Characters The four keys with blue print are used ...

Page 11: ... drops below 0 001 inches H2O gets closer to zero the audible and visual alarms activate The alarms turn off when set to unlatched when the unit returns to the safe range which is defined as negative pressure greater than 0 001 inches H2O Visual Alarm Operation The red light on the front of the unit indicates an alarm condition The red light is on for all alarm conditions low alarms high alarms an...

Page 12: ...hat scroll when TEST key is pressed Due to the different SUREFLOW models available the above information is needed to accurately answer your questions For the name of your local TSI representative or to talk to TSI service personnel please call TSI at U S AND CANADA OTHER COUNTRIES Sales Customer Service Sales Customer Service 800 874 2811 651 490 2811 001 651 490 2811 Fax Fax 651 490 3824 001 651...

Page 13: ...ion 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 ...

Page 14: ...c menus To access a menu scroll through the menus using arrow keys and place the flashing cursor on the desired menu Press the SELECT key to select the menu The first line on the display will now be the selected menu and the second line will show the first menu item 2 The SELECT key is used to gain access to specific menu items To access a menu item scroll through the menu items until item appears...

Page 15: ...w value by pressing the SELECT key pressing the MENU key will exit out of menu function without saving data 8 Press the MENU key to exit current menu and return to main menu 9 Press the MENU key again to return to normal instrument operation If more than one item is to be changed skip steps 8 and 9 until all changes are complete If more items in the same menu are to be changed scroll to them after...

Page 16: ... Three short beeps will sound indicating that the data is being saved HIGH ALARM Saving Data Immediately after the data is saved the SUREFLOW controller returns to the menu level displaying the menu title on the top line of the display and the menu item on the bottom line goes to step 4 ALARM HIGH ALARM WARNING If the MENU key was pressed instead of the SELECT key the new data would not have been ...

Page 17: ...e menus as programmed in the controller The menu items are always grouped by menu and then listed in menu item order not alphabetical order Figure 5 shows a chart of all the Model 8682 controller menu items SET POINTS SET POINT REM SET POINT VENT MIN SET COOLING FLOW UNOCCUPY SET MAX SUP SET MIN EXH SET MIN OFFSET MAX OFFSET TEMP SETP UNOCC TEMP ALARM LOW ALARM HIGH ALARM REM LOW ALM REM HIGH ALM ...

Page 18: ...EA HD2 DCT AREA HD3 DCT AREA HD4 DCT AREA HD5 DCT AREA HD6 DCT AREA HD7 DCT AREA HD1 FLO ZERO HD2 FLO ZERO HD3 FLO ZERO HD4 FLO ZERO HD5 FLO ZERO HD6 FLO ZERO HD7 FLO ZERO FLO STA TYPE TOP VELOCITY HOOD CAL HD1 LOW CAL HD1 HIGH CAL HD2 LOW CAL HD2 HIGH CAL HD3 LOW CAL HD3 HIGH CAL HD4 LOW CAL HD4 HIGH CAL HD5 LOW CAL HD5 HIGH CAL HD6 LOW CAL HD6 HIGH CAL HD7 LOW CAL HD7 HIGH CAL MIN HD1 FLOW MIN H...

Page 19: ...OTE OR ALTERNATE PRESSURE SET POINT REM SET POINT The REM SET POINT item sets an alternate control set point The SUREFLOW controller will maintain the room pressure at the alternate set point when this item is enabled This item is enabled when the REMOTE SWT contact closure pins 3 and 4 is closed or the RS 485 communications sends a command NOTE The REM SET POINT disables the ALARM DELAY 0 to 0 19...

Page 20: ...FLOW set point from a minimum ventilation rate when the space temperature is too warm If room pressure is not maintained the general exhaust damper modulates open until pressure set point is reached provided offset is between MIN OFFSET and MAX OFFSET WIRING This item requires a 1000 Ω platinum RTD temperature sensor to be wired to the TEMPERATURE input AOC pins 29 and 30 The temperature sensor to...

Page 21: ...eached provided required offset is between MIN OFFSET and MAX OFFSET WIRING This item is enabled when the OCCUPANT SWT contact closure is closed pins 11 and 12 DIM or the RS 485 communications sends a command When switch input is open VENT MIN SET and COOLING FLOW are enabled and UNOCCUPY SET is disabled 0 30 000 CFM 0 14 100 l s Linear based flow stations 0 to TOP VELOCITY times the duct area in ...

Page 22: ...l exhaust flow fume hood general exhaust other exhaust and total supply flow 10 000 to 10 000 CFM 0 MAXIMUM FLOW OFFSET MAX OFFSET The MAX OFFSET item sets the maximum air flow offset between total exhaust flow fume hood general exhaust other exhaust and total supply flow 10 000 to 10 000 CFM 0 TEMPERATURE SET POINT TEMP SETP The TEMP SETP item sets the temperature control set point The SUREFLOW c...

Page 23: ...on is defined as when the room pressure rises above the HIGH ALARM set point OFF 0 to 0 18500 in H2O 0 to 0 18500 in H2O OFF REMOTE OR ALTERNATE LOW PRESSURE ALARM REM LOW ALM The REM LOW ALM item sets a remote or second low pressure alarm set point A remote low alarm condition is defined as when the room pressure falls below or goes in the opposite direction of the REM LOW ALM set point This item...

Page 24: ...XH ALM The MAX EXH ALM item sets the general exhaust duct s flow alarm set point A maximum flow alarm is defined as when the general exhaust duct flow is greater than the MAX EXH ALM set point NOTE General exhaust air duct size EX1 DCT AREA and or EX2 DCT AREA Exhaust Flow menu must be entered before MAX EXH ALM can be accessed Actual total exhaust air flow is found in TOT EXH FLOW menu item SYSTE...

Page 25: ...lay outputs An ALARM DELAY prevents nuisance alarms from people entering and leaving the laboratory 20 600 SECONDS 20 SECONDS MUTE TIMEOUT MUTE TIMEOUT The MUTE TIMEOUT determines the length of time the audible alarm is silenced after the MUTE key is pressed This delay temporarily mutes the audible alarm NOTE If the DIM is in alarm when MUTE TIMEOUT expires the audible alarm turns on When the pres...

Page 26: ...If latched is selected the alarms will not terminate until the controller returns to set point and the RESET key is pressed 6 There is a programmable ALARM DELAY that determines how long to delay before activating the alarms This delay affects all pressure remote and flow alarms 7 The MUTE TIMEOUT item sets the length of time the audible alarm is off for all pressure and flow alarms 8 The display ...

Page 27: ...GED right side of Figure 6 The correct configuration is required for the control algorithm to function correctly Figure 6 Exhaust Configuration NOTE In either the GANGED or UNGANGED configuration a general exhaust flow measurement is required UNGANGED or GANGED UNGANGED ACCESS CODES The ACCESS CODES item selects whether an access code pass code is required to enter any menu The ACCESS CODES item p...

Page 28: ...adjustment should be necessary ALTITUDE ELEVATION The ELEVATION item is used to enter the elevation of the building above sea level This item has a range of 0 10 000 feet in 1 000 foot increments The pressure value needs to be corrected due to changes in air density at different elevations 0 10 000 feet above sea level 0 TEMPERATURE CALIBRATION TEMP CAL The TEMP CAL item is used to match or calibr...

Page 29: ...ll be shown on the display There are 10 bars total with each one representing 50 CFM Starting from the right side sign 10 bars displayed indicates no dead band so the controller is always in PID control mode Each bar missing represents 50 CFM of integral dead band The less bars displayed the larger the integral dead band For example with 8 bars displayed 2 bars missing and an offset of 500 CFM the...

Page 30: ...r Direct or Reverse Direct EXHAUST CONTROL DIRECTION EXH CONT DIR The EXH CONT SIG item determines the exhaust control signal s output direction As an example if the control system closes the exhaust damper instead of opening the damper this option will reverse the control signal to now open the damper Direct or Reverse Direct TEMPERATURE CONTROL DIRECTION TEMP DIR The TEMP CONT SIG item determine...

Page 31: ...rimary control loop flow tracking loop When this item is entered a value for Kc is indicated on the display If the AOC is not controlling correctly the Kc gain control coefficient may need adjusting Decreasing Kc will slow the control system down which will increase stability Increasing Kc will increase the control system which may cause system instability The Ti VALUE item changes the integral co...

Page 32: ...xistent control The Kc OFFSET item changes the gain control coefficient of the secondary control loop pressure control loop The pressure control loop is very slow when compared to the primary flow control loop This menu item should not be changed unless problems with the pressure control loop can be established confirm problem is not with primary flow control loop When this item is entered a value...

Page 33: ...adband which is defined as the temperature range above and below the temperature set point TEMP SETP where the controller will not take corrective action 65 66 67 68 69 70 71 72 73 74 75 0 15 30 45 60 Time Temperature F If TEMP DB is set to 1 0 F and the TEMP SETP is set to 70 0 F the controller will not take corrective action unless the space temperature is below 69 0 F or above 71 0 F 0 0 F to 1...

Page 34: ...the temperature range for the controller to fully open and fully close the reheat valve 0 10 20 30 40 50 60 70 80 90 100 110 64 65 66 67 68 69 70 71 72 73 74 75 76 Temperature F Open 6F Throttling Range If TEMP TR is set to 3 0 F and the TEMP SETP is set to 70 0 F the reheat valve will be fully open when the space temperature is 67 F Similarly the reheat valve will be fully closed when the space t...

Page 35: ...he TEMP TI item is used to read and change the temperature control integral time When this item is entered a value for the throttling range is indicated on the display in seconds The integral time is set based on the lag time of the temperature control process The purpose of integral control is to eliminate the offset associated with proportional control A longer integral time will result in a mor...

Page 36: ...tem information only menu item no programming is possible NONE Read only value NONE CONTROL OFFSET VALUE OFFSET VALUE The OFFSET VALUE menu item displays the actual flow offset being used to control the laboratory The OFFSET VALUE is calculated by the AOC control algorithm which uses the MIN OFFSET MAX OFFSET and SET POINT items to calculate required offset This is a system information only menu i...

Page 37: ...y the AOC control algorithm The EXH SET POINT is a diagnostic item used to compare the actual EX1 FLOW IN and EX2 FLOW IN to the calculated flow they should match within 10 This is a system information only menu item no programming is possible NONE Read only value NONE 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 mak...

Page 38: ...e exact voltage displayed is relatively unimportant It is more important that the voltage is changing which indicates the flow station is working correctly NONE Read only value NONE INDIVIDUAL GENERAL EXHAUST FLOW EX1 FLOW IN EX2 FLOW IN The EX FLOW IN menu item displays the current exhaust flow from a general exhaust This item is a diagnostics tool used to compare the general exhaust flow to a tr...

Page 39: ...d traverse match within 10 no change is needed If flow error is greater than 10 calibrate the flow station When a volt meter is hooked to the flow station output a voltage should be displayed The exact voltage displayed is relatively unimportant It is more important that the voltage is changing which indicates the flow station is working correctly NONE Read only value NONE END OF MENU The END OF M...

Page 40: ...ntrol output value Pressing the S T keys change the count on the display Pressing the S key increases the displayed value while pressing the T key decreases the displayed value The exhaust air damper or VAV box should change modulate as the number changes Depending on the actuator s jumper location 0 OPEN or 100 OPEN is full open on damper Conversely 100 OPEN or 0 OPEN will be full closed A value ...

Page 41: ...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 TEMP INPUT The TEMP INPUT item reads the input from the temperature sensor When this item is entered a voltage will be indicated on the display The exact voltage displayed is relatively unimportant It is more important that...

Page 42: ...g outputs are working When this item is entered the number shown on the display indicates the last analog output value The value displayed ranges from 0 to 255 The value 255 corresponds to 0 volts 4 mA output and 0 corresponds to 10 volts 20 mA output Pressing the S T keys change the count on the display Pressing the S key should increase the analog output Pressing the T key will decrease the anal...

Page 43: ...a volt meter will verify the individual analog output is operating correctly RESET THE CONTROLLER TO FACTORY DEFAULT SETTINGS RESET TO DEF When this menu item is entered the 8682 will prompt the user to verify that they want to do this by indicating NO Use the S keys change the display to YES then press the SELECT key to reset the controller to its factory defaults Pressing the MENU key before the...

Page 44: ...oltage representing the corresponding flow input will be displayed If the voltage displayed is negative double check the polarity of the flow input wiring NONE Read only value NONE INDIVIDUAL FUME HOOD EXAUST FLOW SIGNAL CHECK HOOD 1 through HOOD 7 When one of these items is entered a voltage representing the corresponding flow input will be displayed If the voltage displayed is negative double ch...

Page 45: ...er RS 485 or keypad will initiate a change RS 485 communications allows you access to all menu items except calibration and control items The RS 485 network can initiate a change at any time 1 247 1 LON LON When the SERVICE PIN option is selected the Model 8682 sends a broadcast message containing its Neuron ID and program ID This is required to install the Model 8682 on the LonWorks network or to...

Page 46: ...ssure differential 5 volts 12 mA represents a 0 room pressure differential 10 volts 20 mA represents maximum positive pressure differential If the actual pressure exceeds the range the output remains at maximum or minimum depending on direction of flow The AOC updates the analog output every 0 1 second NOTE The units displayed for OUTPUT RANGE values are determined by the UNITS menu item in the CO...

Page 47: ...The value selected equates to 10 volts or 20 mA Zero volts or 4 mA equates to no flow This item affects two analog outputs TOT SUP FLOW and TOT EXH FLOW 1 000 5 000 10 000 20 000 30 000 CFM 500 2 500 5 000 10 000 15 000 l s 10 000 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 k...

Page 48: ...PPLY FLOW STATION ZERO SP1 FLO ZERO through SP4 FLO ZERO The SP FLO ZERO item establishes the flow station zero flow point A zero or no flow point needs to be established in order to obtain a correct flow measurement output see Calibration section All pressure based flow stations need to have a SP FLO ZERO established on initial set up Linear flow stations with a 1 5 VDC output also need to have a...

Page 49: ...h flow calibration 0 Open to 100 Open 100 OPEN SUPPLY FLOW LOW CALIBRATION SP1 LOW CAL through SP4 LOW CAL The SP LOW CAL menu items display the currently measured supply flow rate and the calibrated value for that supply flow The supply dampers will move to the SP LOW SETP damper position for the low calibration The calibrated supply flow can be adjusted using the S T keys to make it match a refe...

Page 50: ...he 8682 will prompt the user to verify that they want to do this by indicating NO Use the S T keys change the display to YES then press the SELECT key to reset the calibrations Pressing the MENU key before the SELECT key will exit out of the menu item END OF 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...

Page 51: ...nto the unit 0 EXHAUST FLOW STATION ZERO EX1 FLO ZERO EX2 FLO ZERO The EX FLO ZERO item establishes the flow station zero flow point A zero or no flow point needs to be established in order to obtain a correct flow measurement output see Calibration section All pressure based flow stations need to have an EX FLO ZERO established on initial set up Linear flow stations with a 1 5 VDC output also nee...

Page 52: ...GH SETP menu item sets the general exhaust damper position for the general exhaust high flow calibration 0 Open to 100 Open 100 OPEN EXHAUST FLOW LOW CALIBRATION EX1 LOW CAL EX2 LOW CAL The EX LOW CAL menu items display the currently measured general exhaust flow rate and the calibrated value for that general exhaust flow The calibrated general exhaust can be adjusted using the S T keys to make it...

Page 53: ...red the 8682 will prompt the user to verify that they want to do this by indicating NO Use the S T keys change the display to YES then press the SELECT key to reset the calibrations Pressing the MENU key before the SELECT key will exit out of the menu item END OF 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 ...

Page 54: ...FUME HOOD FLOW STATION ZERO HD1 FLO ZERO through HD7 FLO ZERO The HD FLO ZERO item establishes the flow station zero flow point A zero or no flow point needs to be established in order to obtain a correct flow measurement output see Calibration section All pressure based flow stations need to have a HD FLO ZERO established on initial set up Linear flow stations with a 1 5 VDC output also need to h...

Page 55: ... velocity of a linear flow station output A TOP VELOCITY must be input for the linear flow station to operate NOTE This item is disabled if a pressure based flow station is installed 0 5 000 FT MIN 0 25 4 m s 0 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 th...

Page 56: ...ence measurement Pressing the SELECT key will save the new calibration data MINIMUM HOOD FLOWS MIN HD1 FLOW through MIN HD7 FLOW The MIN HD FLOW menu items adjust the minimum flow value for each fume hood input Use this menu item if the fume hood flow measurements are too low when the sash is closed 0 10 000 CFM 0 RESET CALIBRATION RESET CAL The RESET CAL menu item restores the default calibration...

Page 57: ...per is normally closed except when room pressure cannot be maintained This may occur when the fume hood sashes are all down and the supply air is at a minimum position The general exhaust damper opens to maintain the required offset and pressure differential Pressure control The pressure differential signal is sent to the AOC assumption laboratory is under negative pressure If pressure is at set p...

Page 58: ...the controller will begin a 3 minute time period If after the 3 minute time period the reheat valve is still fully closed the Model 8682 will then gradually begin increasing the supply volume by 1 CFM second up to the COOLING FLOW set point The controller when controlling supply flow for cooling will not increase the supply flow above the COOLING FLOW ventilation rate If the space temperature decr...

Page 59: ...s SUPPLY FLOW MENU EXHAUST FLOW MENU HOOD FLOW MENU HOOD CAL MENU SET POINT MENU SP1 DCT AREA through SP4 DCT AREA SP1 FLO ZERO through SP4 FLO ZERO FLO STA TYPE TOP VELOCITY SP LOW SETP SP HIGH SETP SP1 LOW CAL SP1 HIGH CAL through SP4 LOW CAL SP4 HIGH CAL EX1 DCT AREA EX2 DCT AREA EX1 FLO ZERO EX2 FLO ZERO FLO STA TYPE TOP VELOCITY EX LOW SETP EX HIGH SETP EX1 LOW CAL EX1 HIGH CAL EX2 LOW CAL EX...

Page 60: ... Control System 1 Model 8682 Adaptive Offset Control System mounted in the laboratory 2 A through the wall pressure sensor mounted between the corridor referenced space and laboratory controlled space 3 Damper pressure dependent VAV box or valve with actuator assembly mounted in supply air duct s 4 Damper pressure dependent VAV box or valve with actuator assembly mounted in exhaust air duct 5 Flow...

Page 61: ... and pressure control VENT MIN SET 900 CFM 10 air changes per hour COOLING FLOW 1 200 CFM Required flow to cool laboratory TEMP SETP 72 F Temperature sensor switches from VENT MIN SET to COOLING FLOW SET POINT 0 001 in H2O Pressure differential set point Sequence Of Operation Beginning scenario Laboratory is maintaining pressure control 0 001 H2O Temperature requirement is satisfied Fume hood sash...

Page 62: ... temperature control satisfied Checkout The AOC controller should have the individual components checked prior to attempting control of the laboratory The checkout procedure outlined below will confirm all hardware is performing correctly The checkout procedure is not difficult and will catch any hardware problems The steps are as follows Confirm wiring is correct The most common problem with inst...

Page 63: ...o their function is not reviewed here If the AOC system passes each of the checks the mechanical piece parts are all functioning correctly CHECK Control output supply Enter CONTROL SUP menu item in diagnostics menu A number between 0 and 100 will be displayed Press the S T keys until either 0 or 100 shows on the display Note the position of the supply air control damper If display reads 0 press th...

Page 64: ...l checks the mechanical components are physically working Calibration The calibration section explains how to calibrate and set the elevation for the AOC pressure sensor and how to calibrate a flow station NOTE The pressure sensor is factory calibrated and normally does not need to be adjusted However inaccurate readings may be detected if pressure sensor is not installed correctly or problems wit...

Page 65: ... Slid Open Sensor span WARNING The span can only be adjusted in the same pressure direction Adjusting span cannot cross zero pressure Example If unit displays 0 0001 and actual pressure is 0 0001 do not make any adjustments Manually change the air balance close or open dampers or open door slightly to get both unit and actual pressure to read in same direction both read positive or negative This p...

Page 66: ...low station location Supply Flow Exhaust Flow or Hood Flow Select SP FLO ZERO to take a supply flow station zero or Select EX FLO ZERO to take a general exhaust flow station zero or Select HD FLO ZERO to take a fume hood flow station zero Press SELECT key Flow zero procedure which takes 10 seconds is automatic Press SELECT key to save data Install flow station back in duct NOTE insert number of fl...

Page 67: ...the S or T keys to adjust the value displayed on the right to match the actual measured airflow which is obtained with a duct traverse measurement or with a capture hood measurement Press SELECT key to save data Hood Flow Calibration Enter HOOD CAL menu Raise the fume hood sash of a previously calibrated fume hood from fully closed to an approximate height of 12 Select the corresponding HD LOW CAL...

Page 68: ...re sensor cleaning are all that are needed to insure that the Model 8682 is operating properly System Component Inspection It is recommended that the pressure sensor be periodically inspected for accumulation of contaminants The frequency of these inspections is dependent upon the quality of the air being drawn across the sensor Quite simply if the air is dirty the sensors will require more freque...

Page 69: ...wing compressed air into the low and high pressure taps flow station does not need to be removed from duct Linear flow stations thermal anemometer type can be cleaned with a dry soft bristled brush such as an artist s brush If necessary water alcohol acetone or trichlorethane may be used as a solvent to remove other contaminants Replacement Parts All components of the room pressure controller are ...

Page 70: ...metimes be difficult TSI recommends confirming all hardware is operating correctly before troubleshooting software problems Hardware Test Three tests need to be performed in order to determine all hardware is functioning correctly The test are broken down into Confirming wiring is correct Confirming physical installation is correct Verifying mechanical components Confirming wiring is correct The m...

Page 71: ...d have rotated either 45 or 90 degrees depending on actuator installed If not see the hardware section Control system is not controlling TEST Control output exhaust Enter CONTROL EXH menu item in diagnostics menu A number between 0 OPEN and 100 OPEN will be displayed Press the S T keys until either 0 OPEN or 100 OPEN shows on the display Note the position of the general exhaust control damper If d...

Page 72: ...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 TEST Temp input Enter TEMP INPUT menu item in diagnostics menu A temperature will be displayed The exact temperature displayed is not important as long as the temperature changes when the RTD signal changes If unit passed all tests the ...

Page 73: ...measured see No power to DIM Verify circuit breaker is on Verify transformer primary measures 110 VAC Verify transformer secondary measures 24 30 VAC Verify electric AOC panel is receiving 24 30 volts between pins 33 and 34 If proper voltage is found between pins 1 and 2 of the DIM all wiring has been checked fuses have been reset and screen is still blank the DIM is probably defective Replace DIM...

Page 74: ...PEN to 100 OPEN or 100 OPEN to 0 OPEN Note position of damper Damper should have rotated 45 or 90 degrees depending on actuator system installed If damper rotated 45 or 90 degrees actuator is installed and operating correctly If damper did not rotate check that Jumper is installed correctly on actuator or E P Appendix C Damper is not physically stuck screws etc Wiring is correct between actuators ...

Page 75: ...Sensor does not calibrate Sensor communications not working Check SENSOR STAT item in diagnostics menu If NORMAL is displayed sensor is okay if COMM ERROR is displayed check wiring pressure sensor address and that DIP switch 1 2 are ON Figure 10 Figure 10 Pressure Sensor DIP Switch Incorrect pressure sensor address Pressure sensor must have address of 1 Check pressure sensor DIP switches 5 6 and v...

Page 76: ... are turned off Incorrect wiring Relay may be defective Press TEST key The individual alarm set points will display If all alarm set points are zero alarm relay is not active so relay will not be required to change state Check the wiring from SUREFLOW relay s output to the device that is connected to the relays Disconnect the DIM wiring from relay contact pins 13 and 14 for low alarm relay and pin...

Page 77: ...em A number between 0 OPEN and 100 OPEN will be displayed Pressing the S key increases the number Pressing the T key decreases the number Measure the DC voltage between pins 44 and 45 46 and 47 for exhaust on the AOC panel Change the CONTROL value about 40 The voltage output should change approximately 4 volts Change the CONTROL value to 60 OPEN The voltage should read approximately 5 VDC If no ch...

Page 78: ......

Page 79: ...In 1000Ω platinum RTD TC 385 Ω 100 C Outputs Supply Control 0 10 VDC Exhaust Control 0 10 VDC Reheat Control 0 10 VDC or 4 20 mA Low Alarm Range 0 19500 to 0 19500 inches H2O High Alarm Range 0 19500 to 0 19500 inches H2O Alarm Contacts SPST N O Max current 2A Max voltage 220 VDC Maximum power 60 W Contacts close in alarm condition Analog Outputs 0 10 VDC RS 485 Modbus RTU or N2 standard LON Optio...

Page 80: ...atts at 0 inches H2O 0 20 watts at 0 00088 inches H2O Dimensions DxH 5 58 in 3 34 in 1 94 in Weight 0 2 lb Damper Actuator Types of Actuator Electric Input Power Electric 24 VAC 7 5 watts max Control Signal Input 0 volts damper closed 10 volts damper open Time for 90 Rotation Electric 1 5 seconds ...

Page 81: ...not use the parity bit The system is set up as a master slave network The TSI units act as slaves and respond to messages when their correct address is polled Blocks of data can be written or read from each device Using a block format will speed up the time for the data transfer The size of the blocks is limited to 20 bytes This means the maximum message length that can be transferred is 20 bytes ...

Page 82: ...ow 11 Flow measured by flow station connected to hood input 1 Displayed in CFM Fume Hood 2 Flow 12 Flow measured by flow station connected to hood input 2 Displayed in CFM Fume Hood 3 Flow 13 Flow measured by flow station connected to hood input 3 Displayed in CFM Fume Hood 4 Flow 14 Flow measured by flow station connected to hood input 4 Displayed in CFM Fume Hood 5 Flow 15 Flow measured by flow ...

Page 83: ... point Displayed in CFM Temp Set point 36 Temperature set point Displayed in F Unoccupied Temp Set point 55 Unoccupied Setback temperature set point Displayed in F Supply Damper Position 64 Current damper position for supply control 0 to 100 Exhaust Damper Position 65 Current damper position for exhaust control 0 to 100 Reheat Valve Position 66 Current valve position for temperature control 0 to 1...

Page 84: ...ex Slave Address 01 Slave Address 01 Function 03 Function 03 Starting Address Hi 00 Byte Count 04 Starting Address Lo 07 Data Hi 03 No Of Registers Hi 00 Data Lo 8E 1000 CFM No Of Registers Lo 02 Data Hi 04 Error Check CRC Data Lo B0 1200 CFM Error Check CRC ...

Page 85: ...when the Override is released There is not a time out on the override command Override Binary Input Command Overriding a 1 to Emergency binary inputs enables that mode To release the controller from emergency state override a 0 to the Emergency input or press either the emergency or reset key Releasing the override will return the controller to the Normal state The alarm and data error variables c...

Page 86: ...n order to receive all of the possible change of status variables Variable Map NPT NPA UNITSi DESCRIPTION AI 1 ft min m s in H2O Pa Room Pressure Value AI 2 CFM l s Current Offset AI 3 F C Current Temperature AI 4 CFM l s Minimum Supply Set point AI 5 CFM l s Total Hood Exhaust AI 6 CFM l s Total Auxiliary Exhaust AI 7 CFM l s Total Supply AI 8 CFM l s Total Exhaust AI 9 CFM l s Hood 1 Flow AI 10 ...

Page 87: ...M l s Minimum Supply Volume in Unoccupied Mode AO 7 CFM l s Minimum Supply Flow Alarm Set point AO 8 CFM l s Max Exhaust Flow Alarm Set point AO 9 CFM l s Minimum Offset Set point AO 10 CFM l s Maximum Offset Set point AO 11 CFM l s Maximum Supply Flow Set point AO 12 CFM l s Minimum Exhaust Flow Set point AO 13 F C Temperature Set point AO 14 F C Unoccupied Temperature Set point AO 15 Units 0 Fee...

Page 88: ...ote Set point 4 Minimum Supply Alarm 4 LON Override 5 Maximum Exhaust Alarm 6 Data Error 7 Emergency Node Object Network variables Configuration properties nci 4 nciOutInht nci 165 nciDeviceIndex nci 166 nciFirmwareVer nviRequest SNVT_obj_request nv1 nvoControlStatus SNVT_char_ascii nv6 nvoAlarm SNVT_alarm nv5 nvoStatusIndex SNVT_char_ascii nv7 nvoStatus SNVT_obj_status nv4 nviMute SNVT_switch nv3...

Page 89: ...flow nv13 nvoSupDamperPos SNVT lev percent nv14 nvoExhDamperPos SNVT lev percent nv15 nvoRehtValvePos SNVT lev percent nv16 nviControlMode SNVT occupancy nv2 nviEmergMode SNVT hvac emerg nv3 nviExhOverride SNVT hvac overid nv4 nvoSupOverride SNVT hvac overid nv5 nvoMinOffsetSet SNVT flow f nv17 nvoMaxOffsetSet SNVT flow f nv18 nvoMinSupFloSet SNVT flow nv19 nvoMaxSupFloSet SNVT flow nv20 nvoUnOccS...

Page 90: ...e by modulating reheat and the supply air volume Optionally a room pressure sensor can be connected to the SUREFLOW Model 8682 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...

Page 91: ...ter Clause 9 baud rate s 76 8k 38 4k 19 2k 9600 bps MS TP slave Clause 9 baud rate s Point To Point EIA 232 Clause 10 baud rate s Point To Point modem Clause 10 baud rate s LonTalk Clause 11 medium Other Device Address Binding Is static device binding supported This is currently necessary for two way communication with MS TP slaves and certain other devices Yes No Networking Options Router Clause ...

Page 92: ...t Analog Input 21 cfm l s Current Flow Offset Analog Input 22 F C Temperature Analog Input 23 Open Supply Damper Position Analog Input 24 Open Exhaust Damper Position Analog Input 25 Open Reheat Valve Position Analog Value 1 MAC Address 1 to 127 Analog Value 2 ft min m s in H2O Pa Room Pressure Set Point 0 19500 to 0 19500 in H2O Analog Value 3 ft min m s in H2O Pa Remote Pressure Set Point 0 1950...

Page 93: ...State Input 1 Status Index 1 Normal 2 Dim Data Error 3 Low Press Alarm 4 High Press Alarm 5 Min Supply Alarm 6 Max Exhaust Alarm 7 Data Error 8 Cal Error 9 Emergency Multi State Value 2 Emergency Mode 1 Exit Emergency Mode 2 Enter Emergency Mode Multi State Value 3 Units Value 1 ft min 2 m s 3 in H2O 4 Pa Device 868001 TSI8682 The units are based on the value of the Units Value object When the Uni...

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Page 95: ...ee menu item HIGH ALARM AOC 1 2 Input 0 10 VDC flow station signal Supply air 3 4 Input Non powered switch input See menu item REM SET POINT 5 18 Input 0 10 VDC flow station signal fume exhaust 21 24 Input 0 10 VDC flow station signal General exhaust 25 28 Input 0 10 VDC flow station signal Supply air 29 30 Input 1000 Ω RTD temperature signal 31 32 Input 0 10 VDC flow station signal Supply air 33 ...

Page 96: ...10 VDC total supply flow See menu item OUTPUT SIG 52 53 Output 0 10 VDC total exhaust flow See menu item OUTPUT SIG 54 55 Output Low supply flow alarm relay N O closes in low flow condition See menu item MIN SUP ALM 56 57 Output High exhaust flow alarm relay N O closes in low flow condition See menu item MAX EXH ALM ...

Page 97: ...arity on many pairs of pins H N A B Damage to the DIM and AOC may occur if polarity is not observed WARNING Controller must be wired exactly as wire diagram shows Making modifications to the wiring may severely damage the unit Figure 11 Wiring Diagram Electric ...

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Page 99: ...quired to enter a menu pressing the key sequence below will allow access to the menu The access code must be entered within 40 seconds and each key must be pressed within 8 seconds An incorrect sequence will not allow access to the menu Key ACCESS CODE 1 Emergency 2 Mute 3 Mute 4 Menu 5 Aux ...

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Page 101: ...P N 1980483 Rev D Copyright 2008 by TSI Incorporated Printed in U S A ...

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