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NuAire Labgard NU-430-400, Operation & Maintenance Manual

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NuAire Labgard NU-430-400 Operation & Maintenance Manual Download Page 66

OM0228

 

Page

 

66

 

of

 

99

 

February/2014

 

8.0

 

Error

 

Messages,

 

Troubleshooting,

 

Option

‐

Diagnostics

 

&

 

Airflow

 

Sensor

 

Performance

 

Verification

 

 

Audible

 

alarms

 

and

 

error

 

messages

 

occur

 

for

 

a

 

variety

 

of

 

reasons.

  

Whenever

 

an

 

alarm

 

condition

 

has

 

been

 

present

 

for

 

a

 

 

period

 

of

 

at

 

least

 

10

 

seconds,

 

the

 

audible

 

alarm/error

 

message

 

will

 

be

 

presented

 

and

 

stay

 

on

 

until

 

the

 

error

 

is

 

cleared.

  

The

 

 

audible

 

alarm

 

will

 

be

 

on

 

for

 

30

 

seconds

 

upon

 

initial

 

alarm

 

condition,

 

then

 

once

 

every

 

ten

 

seconds.

  

When

 

presented

 

with

 

an

 

 

error

 

message,

 

please

 

perform

 

the

 

following:

 

 

Step

 

1:

 

NOTE

 

ALL

 

ERROR

 

MESSAGES.

   

 

Error

 

message

 

will

 

appear

 

in

 

place

 

if

 

the

 

NuAire

 

logo

 

with

 

“Active

 

Alarms”

 

and

 

the

 

alarm

 

type

 

below.

 

  

Step

 

2:

 

VERIFY

 

ERROR

 

MESSAGES.

   

 

Error

 

messages

 

can

 

be

 

verified

 

by

 

cleaning

 

the

 

error

 

function

 

by

 

either

 

turning

 

the

 

blower

  

 

or

 

the

 

cabinet

 

on

 

and

 

off.

 

 

Step

 

3:

 

MONITOR

 

RE

‐

OCCURRENCE

 

OF

 

ERROR

 

MESSAGES.

   

 

If

 

re

‐

occurrence

 

of

 

the

 

error

 

message

 

is

 

immediate

 

or

 

daily,

 

use

 

guide

 

below

 

to

 

correct

 

the

 

situation.

 

 

Summary of Contents for Labgard NU-430-400

Page 1: ...B2 Laminar Flow Biological Safety Cabinet Models NU 430 400 600 Bench Console Operation Maintenance Manual February 2014 Series 65 Revision 1 Manufactured By NuAire Inc 2100 Fernbrook Lane Plymouth MN 55447 Toll Free 1 800 328 3352 In Minnesota 763 553 1270 Fax 763 553 0459 ...

Page 2: ...rom particulate contaminants as prescribed in NSF ANSI 49 Please read this manual carefully to familiarize you with proper installation maintenance and operation of the cabinet Other reference and guideline materials are available through the following web sites www hc sc gc ca www cdc gov od ohs www absa org www absa canada org www ebsa be www inspection gc ca www who int www biosafety be www hse...

Page 3: ...hop drawings are appended in the back flap of this manual along with any modifications and or additions to procedures as outlined in this manual A copy of the original factory test report is also appended to this manual In case this manual and or test report is lost or misplaced NuAire retains a copy in our files A replacement copy can be obtained by calling or writing NuAire Inc stating the model...

Page 4: ... 7 Airflow Smoke Pattern Test 7 8 Site Installation Assessment Tests 7 9 Cleanliness Classification Test for Pharmacy Application 7 10 Main Control Board Description Replacement 7 11 Digital Airflow Sensor Description Replacement Section No 8 Error Indicators Troubleshooting Option Diagnostics Airflow Sensor Performance Verification Section No 9 Remote Contacts Section No 10 Optional Equipment 10 ...

Page 5: ... LFBSC when used with proper technique is an effective laboratory aid in obtaining the optimum control over product quality while reducing the potential for exposure of both product and personnel to airborne biological or particulate chemical agents in low to moderate risk hazard research and drug preparation or product operations as prescribed by the Center for Disease Control CDC Atlanta Georgia...

Page 6: ...e specific agents are used o Which measures are to be taken in the case of an accident Repairs to the device must be carried out only by trained and authorized expert personnel Keep these operating instructions close to the cabinet so that safety instructions and important information are always accessible Should you encounter problems that are not detailed adequately in the operating instructions...

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Page 8: ...OM0228 Page 8 of 99 February 2014 2 0 Models Features The model NU 430 LABGARD ES Class II Type B2 Laminar Flow Biological Safety Cabinet is manufactured in two sizes 4 ft 1 2m and 6 ft 1 8m ...

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Page 11: ...ransferable Prior to returning any item for any reason contact NuAire for a Return Authorization Number This number must accompany all returns Any product shipped to NuAire without this number will be returned refused shipment or collect freight 4 0 Shipments NuAire takes every reasonable precaution to assure that your LABGARD ES cabinet arrives without damage Motor carriers are carefully selected...

Page 12: ...ccessible If the outlet is inaccessible such as a conduit hardwired connection then an appropriate warning label should be applied near the cabinet s on off switch to indicate the circuit breaker on the power distribution panel to be used More than any other biological safety cabinet the NU 430 requires careful site planning and preparation due to the total exhaust nature of the cabinet Proper siz...

Page 13: ...ped unassembled it can be assembled per drawing BCD 05146 It is recommended that the upper and lower base stand braces be installed first then the rear and bottom panels the end panels are always prefastened Once assembled fasten the cabinet per the above instructions Remove the cap protecting the drain valve threads and install the drain valve on the bottom right front of the cabinet using Loctit...

Page 14: ...rvice ball valves should never be used for flammable gasses or oxygen service A special needle valve for oxygen service or certified valve is required and available upon request External connection is to 3 8 inch NPT coupling in the inner sidewalls Connection to plant utilities should be made with proper materials for the individual service and according to National and or Local codes Observe all ...

Page 15: ...The exhaust blower and duct work should be a sealed system that can hold 2 0 inches 51mm w g pressure for 30 minutes with no more than a 10 drop in pressure and be properly vented to the atmosphere to disperse exhausted air 10 A local manual exhaust flow damper NuAire Model NU 940 should be readily accessible either directly mounted on the LFBSC exhaust collar or just above the LFBSC for the maint...

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Page 18: ...volume and corresponding inflow velocity is displayed on the front panel Preset lower and upper alarm limits are factory set but can be field verified at any time To insure that adequate exhaust is available for a dirty exhaust HEPA filter condition the nominal exhaust readings should be attainable with the butterfly valve or damper set at 60 percent open with all other dampers in the system duct ...

Page 19: ...ch operation utilizing independent exhaust volume measurement instrument DIM Per NSF ANSI 49 a 20 loss of exhaust volume must produce an airflow alarm within 15 seconds The testing methods and equipment required are specified on the factory inspection report included with this manual See insert in back cover NOTE IT IS RECOMMENDED THAT THESE TESTS BE PERFORMED BY A QUALIFIED TECHNICIAN WHO IS FAMI...

Page 20: ...t Work Surface Up to 3 ea Sidewall Up to 3 ea Sidewall One Backwall Left or Right Work Surface Cabinet Size Inches mm Height Fully Assembled Height Minimum for Transport Width Depth with Control Center 61 1549 61 1549 53 5 8 1362 32 7 8 835 61 1549 61 1549 77 5 8 1972 32 7 8 835 Work Access Opening Inches mm Standard Opening Height Standard Inflow Velocity 8 203 105 FPM 53 m s 8 203 105 FPM 53 m s...

Page 21: ...tically compensates for filter loading voltage variances and other environmental effects A digital differential velocity pressure glow grid in the exhaust airstream monitors for exhaust volume and subsequent inflow velocity Downflow velocity exhaust volume and inflow velocity are displayed on the TOUCHLINK LCD screen The control system also monitors the sliding window position with a micro switch ...

Page 22: ...back the TOUCHLINK LCD just touch the screen and the screen saver will reset To change the screen saver time access SCREEN SETUP through the menu icon 6 1 3 Run Mode Anytime the blower icon is selected the Run Mode screen will appear The Run Mode screen will display a LFBSC profile and initiate and display the countdown of a 150 second warm up period During the warm up period the aseptic cleaning ...

Page 23: ...alarms can be silenced or will produce an alarm tone for 30 seconds then into a ring back cycle of once every 10 seconds Pressing the alarm silence icon will silence the audible alarm for 15 minutes then into a ring back cycle at of once every 10 seconds Alarm Types Window High window is raised above its nominal height Downflow High Limit downflow is above the high alarm setpoint Downflow Low Limi...

Page 24: ...TIMER PURGE TIMER OUTLET TIMER UV LIGHT TIMER AUTO RUN TIMER UV FL UP DOWN ENTER MENU xx xx AM xx xx xx UV FL UP DOWN START MENU xx xx AM xx xx xx UV FL UP DOWN SAVE LABORATORY TIMER CURRENT SETTING 0 00 MINS SECS TIME REMAINING 0 00 MINS SECS THE LABORATORY TIMER IS A GENERAL PURPOSE TIMER THAT WHEN SET TO A VALUE WILL COUNTDOWN AND AUDIBLE ALARM UPON TIMER EXPIRATION PRESS UP AND DOWN TO CHANGE ...

Page 25: ...he auto timer menu select the desired day for the auto timer to function If multiple days are desired each day will be required to be set individually MENU xx xx AM xx xx xx UV FL UP DOWN SAVE MENU xx xx AM xx xx xx UV FL UP DOWN SAVE OUTLET TIMER CURRENT SETTING 0 00 MINS SECS THIS TIMER CONTROLS HOW LONG THE OUTLET REMAINS POWERED AFTER IT TURNS ON THE OUTLET WILL AUTOMATICALLY TURN OFF WHEN THE...

Page 26: ... timer function for each day as desired 6 1 6 Menu Icon The menu icon when pressed will provide a list of menu items for various BSCC functions MENU xx xx AM xx xx xx CALIBRATION SERVICE TIME DATE PASSWORD CABINET DECONTAMINATION SCREEN SET UP FILTER STATUS UV FL UP DOWN ENTER MENU xx xx AM xx xx xx UV FL UP DOWN SAVE DIS SETTING MONDAY PRESS SWITCH TO TOGGLE BETWEEN AUTO ON AND OFF TIMES PRESS DI...

Page 27: ...ed is real time and will not automatically adjust for day light saving time MENU xx xx AM xx xx xx UV FL UP DOWN ENTER SET TIME SET DATE MENU xx xx AM xx xx xx UV FL UP DOWN SAVE SETTING CLOCK TIME PRESS SWITCH TO TOGGLE BETWEEN 12 OR 24 HR DISPLAY USE AND TO SELECT HOUR OR MINUTES USE UP AND DOWN TO CHANGE TIME PRESS SAVE TO SAVE NEW SETTING SWITCH X XX AM MENU xx xx AM xx xx xx UV FL UP DOWN SAV...

Page 28: ... is 1234 or you may use the set password menu to change the password as desired Enable Disable Password Menu Set Password Menu MENU xx xx AM xx xx xx UV FL UP DOWN ENTER SET PASSWORD ENABLE DISABLE PASSWORD DEFAULT PASSWORD MENU xx xx AM xx xx xx UV FL ON OFF SAVE BLOWER LOCKOUT OPTION IS OFF WHEN BLOWER LOCKOUT IS ON A PASSWORD IS REQUIRED TO TURN THE BLOWER ON OR OFF WHEN BLOWER LOCKOUT IS OFF N...

Page 29: ... background contrast and audible touch screen tone MENU xx xx AM xx xx xx UV FL UP DOWN ENTER SET BACKGROUND COLORS TOUCH DISPLAY TONE SCREEN SAVER MENU xx xx AM xx xx xx UV FL UP DOWN SET MAIN BACKGROUND COLOR SET BORDER COLOR MENU xx xx AM xx xx xx UV FL DEFAULT DEFAULT PASSWORD PRESSING DEFAULT WILL SET THE WORKING PASSWORD BACK TO THE FACTORY DEFAULT SETTING OF 1234 MENU xx xx AM xx xx xx UV F...

Page 30: ...ETTING PRESS ENTER TO SAVE NEW SETTING MENU xx xx AM xx xx xx UV FL ON OFF SAVE SCREEN SAVER OPTION SETTING 60 THIS OPTION DETERMINES HOW LONG THE DISPLAY WILL REMAIN ACTIVE AFTER THE BLOWER IS TURNED OFF VALID RANGE IS 0 240 MINUTES SETTING THE VALUE TO 0 TURNS THE SCREEN SAVER OFF PRESS UP DOWN TO CHANGE THE VALUE PRESS SAVE TO SAVE THE SETTING MENU xx xx AM xx xx xx FILTER LIFE AVAILABLE XX GRE...

Page 31: ...ndow can be closed and the UV light turned on if installed NOTE If night setback exhaust airflow is reduced by the Building Automation System BAS and not by the NuAire Model NU 951 012 valve it would still be recommended to use the contacts on the main control board to initiate the night setback option to display night setback active inhibit exhaust alarms fluorescent light and internal blower 6 1...

Page 32: ...ed by appropriate safety personnel 6 2 2 Minimize Penetration of Air Curtain The minimum number of items necessary should be placed into the cabinet to prevent overloading but the work should also be planned to minimize the number of times an operator s hands and arms must enter and leave the air curtain at the open face The ideal situation is to have everything needed for the complete procedure p...

Page 33: ...his precaution is merely an extension of good aseptic technique as practiced on open bench tops The good laboratory practices designed to minimize creation and or release of aerosols to the environment should not be discontinued Items of equipment in direct contact with the etiologic agent must remain in the cabinet until enclosed or until surface decontaminated Trays of discard pipettes must be c...

Page 34: ...ge of contaminated materials over uninoculated cultures or clean glassware should be avoided and transfer of viable materials should be performed as deeply into the cabinet away from open face as possible 6 3 4 Air Purge Additional purging of the workspace without user activity should be allowed for 2 3 minutes after materials and apparatuses have been placed in it This will rid the area of all lo...

Page 35: ...bove evaluation criterion several aids may be supplied to accommodate the user Ergonomic chair A six way articulating seat and back control for personalized adjustment to assure proper user posture Be sure feet are resting on the floor chair foot support or foot rest Also be sure back is fully supported with proper chair adjustments Forearm armrest support The cabinet is provided with a forearm su...

Page 36: ...nding on the model the diffuser screen is secured to the cabinet by 8 32 screws or 1 4 20 acorn nuts 3 places It is purposely a tight fit and is secured to the back wall with projecting thread less studs e Clean both sides of the perforated metal diffuser screen and remove it from the cabinet f Lift the cabinet worktray clean both sides and remove it from the cabinet g Remove the front perforated ...

Page 37: ...chamber in the safety cabinet that is to be disinfected The formaldehyde evaporates immediately after reaching its boiling point the minimum reaction time is 6 hours Therefore the formaldehyde should be neutralized after the specified reaction time by vaporizing ammonium bicarbonate Flammable Hazard Paraformaldehyde is flammable The auto ignition temperature of paraformaldehyde is 300 C 572 F Chem...

Page 38: ...ventive maintenance is required on the interior of the cabinet i e the area behind the access panel containing the HEPA filters and motor blower assembly All required adjustments in order to maintain proper cabinet airflows are external to the cabinet interior The motor is lubricated for life and is thermally protected with automatic reset 7 2 Fluorescent Lamp Bulb Replacement The two T8 fluoresce...

Page 39: ... any maintenance action Step 1 Remove screws at each upper side of the control center and allow the control center to rotate down resting on the safety straps Second remove the front decorative panel which is held into position by 3 knurled nuts on the top edge and 6 knurled screws on the front Step 2 Place sliding window into lowest position and remove front filter panel which is held into positi...

Page 40: ...al a It is recommended that the motor blower to be removed as a single unit To remove disconnect electrical connections to the motor remove the HEPEX pressure plenum and unbolt the motor blower assembly from the roof of the cabinet 4 places Always inspect the rubber isolation motor mounts and replace those that are cracked or visibly show stress b Replace the motor exactly as originally installed ...

Page 41: ...OM0228 Page 41 of 99 February 2014 ...

Page 42: ... After pressing the Calibration Service menu item a password screen will appear The default password is 9876 Once the service password is entered the Calibration Service menu will appear 7 5 2 Calibration Service Menu The Calibration Service menu provides a list of sub menu items to accomplish all service tasks For airflow calibration only the first three sub menu items are used in the calibration...

Page 43: ...ed Again to verify press the correct Type and the Model Size of the current selected cabinet model will be designated Once verified the correct type and model are designated then press BACK to return to Calibration Service menu UV FL UV FL MENU xx xx AM xx xx xx TYPE A2 70 RECIRCULATE 30 EXHAUST TYPE B1 30 RECIRCULATE 70 EXHAUST TYPE B2 100 EXHAUST SET OEM DISPLAYED SET MOTOR TYPE UP DOWN ENTER CU...

Page 44: ... to access these additional parameters Select and SAVE appropriate size of each MENU xx xx AM xx xx xx UP DOWN SAVE SET DOWNFLOW AREA SIZE SET EXHAUST DIAMETER SIZE SET OPENING SIZE PREVIOUS MENU xx xx AM xx xx xx UP DOWN SAVE 14 INCH EXHAUST DIAMETER 12 INCH EXHAUST DIAMETER 10 INCH EXHAUST DIAMETER 8 INCH EXHAUST DIAMETER CURRENTLY SET FOR 12 INCH EXHAUST MENU xx xx AM xx xx xx UP DOWN SAVE CURR...

Page 45: ...its menu item Then press any of the individual setpoints or alarm limits to verify and or change Press UP or DOWN to change new value Press SAVE to enter new value Default values for NU 430 400 Default values for NU 430 600 Downflow setpoint 60 Downflow setpoint 60 Downflow high limit 66 Downflow high limit 66 Downflow low limit 54 Downflow low limit 54 Exhaust setpoint 754 Exhaust setpoint 1100 E...

Page 46: ...nce The cabinet is considered to be certifiable if the following airflow measurements are present a Downflow average 60 LFPM 5 LFPM 30 m s 025 m s b Inflow average 105 LFPM 5 LFPM 53 m s 025 m s using the Direct Inflow Measurement DIM method or alternate 3 constricted inflow velocity measurement method The calibration of the airflow monitor sensors occurs during the cabinet airflow balancing proce...

Page 47: ...applicable to the inflow velocity and it s relation to exhaust volume since the exhaust sensor only monitors the exhaust airflow If the inflow velocity is calibrated at the outer edge of the range a greater chance for alarm conditions would exist due to its closer proximity to the alarm limits Press UP DOWN to change exhaust volume to the value just calculated using the inflow volume NOTE Assume d...

Page 48: ...wer motor turns back ON Finally adjust the exhaust system back to the correct inflow velocity and exhaust volume Reattach control box and install pressure switch cap Step 5 If present remove direct reading instrument from window access open area 7 5 3 2 Exhaust Volume Calibration with the NU 951 012 Motorized Butterfly Valve If desired activate exhaust control auto zero The exhaust control auto ze...

Page 49: ...N EXHAUST CONTROL AUTO ZERO EXHAUST UPDATE MORE OPTIONS UP DOWN ENTER MENU xx xx AM xx xx xx UV FL EXHAUST DAMPER AUTO ZEROING OPTION IS ON WHEN THE EXHAUST DAMPER AUTO ZEROING IS ON AN AUTOMATIC CHECK OF THE DAMPER CALIBRATION POINT OCCURS AT SET TIME WHEN OFF NO CHECKS WILL OCCUR PRESS TIME TO CHANGE CHECK TIME PRESS TEST TO START A ZERO CHECK ROW ON OFF SAVE TIME TEST MENU xx xx AM xx xx xx UV ...

Page 50: ...ty to the alarm limits Once damper position and or exhaust volume is set press SAVE to enter the damper position Press CAL EX to exit directly into exhaust sensor calibration menu Press UP DOWN to change exhaust volume to the value just calibrated using the inflow volume NOTE Assume downflow velocity is at the nominal value of 60 fpm for exhaust volume calculation purposes as it will be adjusted d...

Page 51: ... lower alarm limit to ensure the internal supply blower motor turns back ON Finally adjust the exhaust system back to the correct inflow velocity and exhaust volume Reattach control box and install pressure switch cap Step 5 If present remove direct reading instrument from window access open area 7 5 3 3 Downflow Calibration NOTE If already in Calibration Service menu select CALIBRATE DOWNFLOW SEN...

Page 52: ...y as close as possible to the stated goal of 60 LFPM 30 m s DON T SPEND MORE THAN 5 MINUTES SPOT CHECKING FINAL ADJUSTMENTS WILL BE MADE IN THE FOLLOWING STEPS Press SAVE to enter the current blower speed Step 5 Now measure the average downflow velocity over the entire workzone using the recommended downflow velocity test grid see Table 7 0 MENU xx xx AM xx xx xx UP DOWN SAVE UV FL MOTOR RPM XXXX ...

Page 53: ...rected average downflow velocity see individual model numbers below to calculate the supply volume is considered acceptable to certify a NuAire cabinet Use the supply volume minus the total volume to calculate inflow volume and average inflow velocity Model Number Supply Volume Correction Factor NU 430 400 Average downflow velocity plus 4 fpm NU 430 600 Average downflow velocity Now the calibratio...

Page 54: ...IGHT SETBACK Step 2 Select CALIBRATE NIGHT SETBACK MENU xx xx AM xx xx xx UV FL UP DOWN ENTER ENABLE NIGHT SETBACK CALIBRATE NIGHT SETBACK MENU xx xx AM xx xx xx UV FL ON OFF SAVE NIGHT SETBACK OPTION IS OFF WHEN THE NIGHT SETBACK OPTION IS ON THE NIGHT SETBACK ICON WILL APPEAR ON THE DISPLAY TO TURN NIGHT SETBACK ON OFF PRESS SAVE TO ENTER SELECTION MENU xx xx AM xx xx xx UV FL UP DOWN ENTER ENAB...

Page 55: ... night setback operating percentage value Please note in the night setback operation the electronic airflow control system will cause the butterfly valve actuator to hunt more operating at lower airflow volumes When taking the inflow volume measurements average several readings to obtain the most accurate results Step 4 When the desired night setback operating percentage value is obtained Press SA...

Page 56: ... interior by a light push fit with projecting studs 7 6 2 Exhaust Filter The exhaust filter is checked using a gross leak method since the exhaust filter is not easily scanned when connected to an exhaust system It may be leak tested by drilling a hole in the duct at a downstream location that will produce a well mixed aerosol and inserting the sampling probe with rigid extension tubing through ho...

Page 57: ... the edges of the entire perimeter of the work opening approximately 1 5 inches 38mm outside the cabinet with particular attention paid to corners and vertical edges 4 Pass a smoke source 2 inches 51mm from the sides up inside of the window at the side channel seals and along inside of the cabinet along the top of the work area or immediately below the wiper gasket The criteria used to evaluate th...

Page 58: ...test using non hazardous materials A minimum of three 3 1 minute particle counts shall be sampled and recorded while the user simulates aseptic compounding manipulations At Rest Particle Count Test Take 5 test points in 1 minute intervals on a grid in a horizontal plane as measured approximately 6 inches 152mm above the worksurface The grid location is designed as the workzone center point and eac...

Page 59: ...d to set the desired average inflow velocity The inflow exhaust volume is measured by using a Direct Inflow Measurement DIM instrument i e Shortridge Flowhood The DIM instrument can be used directly on the cabinet with NO CORRECTION FACTORS REQUIRED The DIM instrument should be equipped with a flowhood that is as close as possible to the width of the cabinet i e NU 430 400 should use 1 x 4 foot fl...

Page 60: ...2 45 580 1158 49 738 1263 53 896 1369 58 054 1475 62 212 1580 66 375 1686 Number of Readings Average Velocity of Constricted Area ft min mps 1 Average Velocity of Constricted Area fpm m s 2 X Constricted Access Area ft2 m2 3 Constricted Area Volume CFM m3 s 4 Constricted Area Volume CFM m3 s 5 8 203mm Access Window Area ft2 m2 6 Average Velocity of 8 203mm Access Window Area fpm m s 7 Average Velo...

Page 61: ...o based on the inflow measurement volume and adding the supply volume from the table for the nominal average velocity the calibrated exhaust value entered should be 754cfm 1281CMH Parameter Minimum Stated Nominal Maximum Acceptable Flow Average Flow Acceptable Flow NU 430 400 1 Inflow Avg Velocity 100 51 m s FPM 105 53 m s FPM 110 56 m s FPM 2 Inflow Volume 258 438 CMH CFM 271 460 CMH CFM 284 483 ...

Page 62: ...USE SIZE 1 4 X 1 1 4 INCH 5 X 20MM 5 X 20MM TR 5 NU 430 400 8 AMPS 3 AMPS 1 AMP 4 AMPS NU 430 600 10 AMPS 3 AMPS 1 AMP 4 AMPS 7 10 3 Main Control Board Replacement Note All setup and calibration data will be lost the memory reinitialized to the default values and all control functions reset to an initial cabinet power condition If possible before the main control board replacement it would be pref...

Page 63: ... calibration cabinet type motor type sensor data and options settings back to default settings Master Reset should only need to be used for a main control board replacement After pressing the Calibration Service menu item a password screen will appear The default password is 9876 Once the service password is entered the Calibration Service menu will appear Select CABINET RESET from the menu MENU x...

Page 64: ...r switch within the control center to turn off the cabinet Turn the cabinet back on the display screen will remain blank for up to a minute then will indicate Power Loss Alert press the screen to clear the message and return to the Calibration Service menu to enter cabinet type motor type verify setpoints find sensors and perform airflow calibration MENU xx xx AM xx xx xx UV FL RESET MASTER RESET ...

Page 65: ...til ring locks Once the new sensor has been replaced proceed to the digital sensor setup procedure in section 8 7 11 2 Exhaust Pressure Sensor The exhaust pressure sensor is a digital differential velocity pressure flow grid The exhaust pressure sensor board is located within the right side of the control center The exhaust pressure sensor function utilizes a differential pressure transducer and e...

Page 66: ...alarm will be on for 30 seconds upon initial alarm condition then once every ten seconds When presented with an error message please perform the following Step 1 NOTE ALL ERROR MESSAGES Error message will appear in place if the NuAire logo with Active Alarms and the alarm type below Step 2 VERIFY ERROR MESSAGES Error messages can be verified by cleaning the error function by either turning the blo...

Page 67: ...ower motor cool off for a minimum of 30 minutes to assure thermal protector is not open Display indicates Remote Override Active Indicates that the remote override is activated preventing the usage of the cabinet Power Loss Alert Indicates a power interruption has occurred Press DISPLAY to clear message Cabinet outlets won t turn on Check outlet fuse located on main control board Check voltage com...

Page 68: ...nu the service technician can bypass the blower warm up time itself This feature remains on for one hour from the time the Calibration Service menu was accessed When bypassing the warm up time it is not uncommon to experience a brief alarm as the blower stabilizes at setpoint 8 2 2 Calibration Service Menu The Calibration Service menu provides a list of sub menu items to accomplish all service tas...

Page 69: ...and model are designated then press BACK to return to Calibration Service menu Press SET MOTOR TYPE to verify correct setting Upon a MASTER RESET the motor type is defaulted to AC The NU 430 Series 60 requires the motor type selected to be DC Always verify motor type when verifying cabinet type UV FL UV FL MENU xx xx AM xx xx xx TYPE A2 70 RECIRCULATE 30 EXHAUST TYPE B1 30 RECIRCULATE 70 EXHAUST T...

Page 70: ... values Press MENU to access these additional parameters Select and SAVE appropriate size of each MENU xx xx AM xx xx xx UP DOWN SAVE SET EXHAUST DIAMETER SIZE SET OPENING SIZE PREVIOUS MENU xx xx AM xx xx xx UP DOWN SAVE 14 INCH EXHAUST 12 INCH EXHAUST 10 INCH EXHAUST 8 INCH EXHAUST CURRENTLY SET FOR 12 INCH EXHAUST MENU xx xx AM xx xx xx UP DOWN SAVE CURRENTLY SET FOR 8 INCH OPENING 8 INCH 10 IN...

Page 71: ...ts menu item Then press any of the individual setpoints or alarm limits to verify and or change Press UP or DOWN to change new value Press SAVE to enter new value Default values for NU 430 400 Default values for NU 430 600 Downflow setpoint 60 Downflow setpoint 60 Downflow high limit 66 Downflow high limit 66 Downflow low limit 54 Downflow low limit 54 Exhaust setpoint 754 Exhaust setpoint 1100 Ex...

Page 72: ...nnect exhaust pressure sensor Turn on power to cabinet and navigate to the sensor setup menu Select FIND NEW DOWNFLOW SENSOR and follow menu Press LEARN to find sensor If successful display will indicate SENSOR FOUND if not display may indicate SENSOR ALREADY USED or FAILED TO FIND SENSOR If this is the case perform MASTER RESET and start process over Once downflow sensor is found turn off power r...

Page 73: ...xhaust valve will be closed to a percentage of the original setpoint typically to maintain a minimum of 100 fpm 51 m s and the display will indicate night setback active The sliding window can be closed and the UV light turned on if installed 8 2 7 Service The service setup menu allows a QUALIFIED TECHNICIAN to configure calibrate and obtain functional service data Each parameter submenu will be d...

Page 74: ...OWN ENTER UV RUN TIME BLOWER MOTOR RUN TIME MENU xx xx AM xx xx xx UP DOWN SAVE MOTOR BLOWER RUN TIME CURRENT HOURS XXXX THE MOTOR BLOWER RUN TIME INDICATES HOW MANY HOURS THE BLOWER HAS BEEN ON TIME MAY BE RESET OR TRANSFERRED FOR SERVICE PURPOSES PRESS UP DOWN TO CHANGE THE HOURS MENU xx xx AM xx xx xx RESET UV LIGHT USAGE CURRENT HOURS XXXX THIS TIME SHOWS HOW MANY HOURS THE UV LIGHT HAS LOGGED...

Page 75: ...try of the serial number After entry of the serial number press ENTER to save the serial number MENU xx xx AM xx xx xx UV FL SUPPLY HEPA FILTER MM DD YYYY EXHAUST HEPA FILTER MM DD YYYY BLOWER MOTOR MM DD YYYY MAIN CONTROL BOARD MM DD YYYY DOWNFLOW SENSOR MM DD YYYY EXHAUST SENSOR MM DD YYYY PRESS ENTER TO SELECT ITEM PRESS MENU TO EXIT UP DOWN ENTER MENU xx xx AM xx xx xx UV FL SERIAL NUMBER XXXX...

Page 76: ...RPM to determine filter percentage availability Starting RPM data may be entered at any time for service purposes MENU xx xx AM xx xx xx UV FL DUE SAVE LAST CERTIFICATION DATE MM DD YYYY PRESSING SAVE WILL SET THE CERTIFICATION DATE TO TODAYS DATE DD MM YYYY PRESS DUE TO SET WHEN NEXT CERTIFICATION WILL BE REQUIRED MENU xx xx AM xx xx xx UV FL UP DOWN SAVE CERTIFICATION REQUIRED TIME PERIOD CURREN...

Page 77: ...haust display will use the exhaust update averaging function MENU xx xx AM xx xx xx UV FL AIRFLOW DISPLAY AVERAGING UV WINDOW INTERLOCK CONTROL ALARM MANUAL CONTROL ALARM SILENCE EXHAUST OVERRIDE MOTOR BLOWER LOCKOUT EXHAUST CONTROL DAMPER POSITION EXHAUST CONTROL AUTO ZERO EXHAUST UPDATE MORE OPTIONS UP DOWN ENTER MENU xx xx AM xx xx xx UV FL ON OFF SAVE AIRFLOW AVERAGING OPTION IN ON WHEN ON THE...

Page 78: ...N to run the cabinet in manual mode This means with no controls or alarms activated When the manual control is on the downflow and inflow displays will indicate nominal setpoints Airflow adjustments can be made in the manual mode by going into airflow calibration and adjusting the blower duty cycle The blower duty cycle will remain constant in manual mode The display will also indicate the manual ...

Page 79: ...erlock for testing purposes When exhaust override is off sufficient exhaust airflow is required for the internal blower to function When on the internal blower will function without sufficient exhaust NOTE The redundant pressure switch must also be bypassed for the internal blower to run without exhaust MENU xx xx AM xx xx xx UV FL ON OFF SAVE ALARM SILENCE OPTION IS ON WHEN ALARM SILENCE IS ON PR...

Page 80: ...ver if the cabinet is tied into the exhaust blower circuit it is desirable to turn off the exhaust control and alarm function when the blower switch is turned off This will avoid having a constant exhaust alarm when the exhaust system is turned off Valid settings for the exhaust control damper position are open close freeze or off Off keeps the exhaust control alarms active when the blower is off ...

Page 81: ...play This sequence will then be performed at the programmed time once every 24 hours The auto zero sequence can be checked by pressing TEST to initiate a four minute test sequence Exhaust Update This parameter allows for the selection of time to determine how much exhaust flow data is averaged before being displayed The time is displayed in seconds with a programmable range of 1 to 60 MENU xx xx A...

Page 82: ...l flexibility for exhaust system stability optimization Remote Override Damper Open This parameter allows or the NU 951damper to open during a remote override contact closure Normally the NU 951 damper function will close during a remote override contact closure However this option allows the opposite damper function MENU xx xx AM xx xx xx UV FL UP DOWN SAVE EXHAUST AIRFLOW CONTROL OPTION SETTING ...

Page 83: ...yperTerminal or printer via RS 232 interconnect standard RS 232 provides short range 50 feet simple point to point connection with another RS 232 device The Communication Interface utilizes 9 bit character frame with eight bits no parity and a stop bit 8 N 1 with a constant transmission speed of 57 600 bps for communication The connection for the RS 232 output is located on the main control board ...

Page 84: ...ding or blue the fan relay will be on or energized In either case the fan relay will be on when the blower switch is on or green and off when the blower switch is off or not colored MENU xx xx AM xx xx xx UV FL ON OFF SAVE PRINTER REPORT FREQUENCY OPTION SETTING 0 THIS OPTION DETERMINES HOW OFTEN THE CONTROLLER OUTPUTS THE CURRENT STATUS TO A PRINTER VALID CHANGES ARE 1 TO 60 MINUTES SETTING THE F...

Page 85: ...ion occurs before activating an audible and visual alarm The time is displayed in seconds with a programmable range from 2 to 12 seconds MENU xx xx AM xx xx xx UV FL ON OFF ENTER ALARM SILENCE TIME OPTION SETTING 15 THIS OPTION DETERMINES HOW MANY MINUTES THE AUDIBLE ALARM WILL BE SILENCED WHEN SILENCE IS PRESSED VALID RANGES ARE 1 60 MINUTES MENU xx xx AM xx xx xx UV FL UP DOWN SAVE DOWNFLOW UPDA...

Page 86: ...ise these output functions Pressing TOGGLE will turn on and off the functions Press UP and DOWN to select the test output desired Use the display icons to turn on off each function of blower UV light fluorescent light outlet and optional power window if installed MENU xx xx AM xx xx xx UV FL UP DOWN ENTER TEST OUTPUTS READ INPUTS MENU xx xx AM xx xx xx UV FL UP DOWN TOGGLE ACCESSORY OUTLET OFF DAM...

Page 87: ...o into a downflow alarm condition The exhaust airflow reading should increase during this test However the downflow reading should go down below 25 fpm 13 m s There should also be a noticeable increase in motor blower noise It would also be recommended to monitor motor blower voltage during the test The motor blower voltage should be monitored from when the cabinet is running normally During the t...

Page 88: ...he supply On Off and exhaust delay options The relay will activate whenever the blower is turned on and stay on unless after 5 minutes there is a low exhaust alarm then the relay will de activate If exhaust is sufficient the relay will stay active If the blower is then turned off the relay will stay active for one minute then de activate The AUX relay may also be selected to operate the same as th...

Page 89: ...or that personnel leave the cabinet face area 10 1 2 Operation The operation of the ultraviolet light is accomplished by closing the sliding window and pressing the UV switch location on the front panel The sliding window is interlocked to the ultraviolet light so when the sliding window is raised the ultraviolet light will turn off 10 1 3 Precaution The rays from germicidal tubes may cause a pain...

Page 90: ...rep hermolyticus alpha type 5 500 Staphylococcus aureus 6 600 Staphylococcus albus 5 720 Micrococcus sphaeroides 15 400 Sarcina lutea 26 400 Pseudomonas fluorescens 7 040 Escherichia coli 7 040 Proteus vulgaris 7 480 Serratia marcescens 6 160 Bacillus subtilis 11 000 Bacillus subtilis spores 22 000 Spirillum rubrum 6 160 References a Luckiesh Matthew 1946 Application of Germicidal Ethyemal and Inf...

Page 91: ...boratories the expected transient over voltage is 2500 V for a 230 V supply and 1500 V for a 120 V supply 11 5 Pollution Degree 2 0 Pollution degree describes the amount of conductive pollution present in the operating environment Pollution degree 2 assumes that normally only non conductive pollution such as dust occurs with the exception of occasional conductivity caused by condensation 11 6 Chem...

Page 92: ...l Stainless Steel Worksurface Stainless Steel Window Faring Stainless Steel Window Glides HDPE Window Safety Glass Window Frame Stainless Steel Front Service Panel Painted Steel Front Decorative Panel Painted Steel Control Center Painted Steel Supply Diffuser Aluminum Exhaust Filter Aluminum HEPA Filter Frames Painted Steel Hepex Bag PVC Blower Wheel Housing Steel Motor Various Steel Copper Printe...

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