NU-9728GA
Ultra-Low Temperature Freezer
INSTRUCTION MANUAL
Page 1: ...NU 9728GA Ultra Low Temperature Freezer INSTRUCTION MANUAL...
Page 2: ...OR DELAY TIME P 18 SETTING OF DOOR ALARM DELAY TIME P 19 MONITOR OF FREEZER STATUS P 20 ALARMS SAFETY FUNCTIONS P 21 ROUTINE MAINTENANCE P 22 Cleaning of cabinet P 22 Cleaning of condenser filter P 22...
Page 3: ...n adequate place to refer to it as necessary The contents of the instruction manuals will be subjected to change without notice due to the improvement of performance or functions Contact our sales rep...
Page 4: ...n must be followed Be sure to keep this instruction manuals in a place accessible to users of this unit Some warning and or caution labels are attached on the unit Following shows the description of s...
Page 5: ...wer supply outlet is not grounded it will be necessary to install a ground by qualified engineers Never ground the unit through a gas pipe water main telephone line or lightning rod Such grounding may...
Page 6: ...ion Disconnect the power supply plug if there is something wrong with the unit Continued abnormal operation may cause electric shock or fire When removing the plug from the power supply outlet grip th...
Page 7: ...insertion may cause a heat or ignition Never store corrosive substances such as acid or alkali in this unit if the container cannot be sealed These may cause corrosion of inner components or electric...
Page 8: ...0 o C Maximum relative humidity 80 for temperature up to 31 o C decreasing linearly to 50 relative humidity at 40 o C Mains supply voltage fluctuations up to 10 of the nominal voltage Transient overvo...
Page 9: ...8 FREEZER COMPONENTS 11 inside 7 1 2 3 6 8 12 7 4 9 10 13 5 18 19 17 14 20 16 Rear side Power cord 15...
Page 10: ...22 Routine maintenance for the cleaning 12 Space for temperature recorder An automatic temperature recorder optional component can be attached here See page 32 Temperature recorder Option 13 Key lock...
Page 11: ...lay time Refer to page 15 16 17 19 and 20 for details respectively 7 Digit shift key Pressing this key in the setting mode causes the changeable digit to shift Key lock setting is available by pressin...
Page 12: ...de the chamber contracted When a door is closed and opened soon a door is easy to open with the following process 1 Turn the cap of the left side counterclockwise about two laps That can be removed co...
Page 13: ...y from the unit falling or tipping over Select a level and sturdy floor for installation This precaution will prevent the unit from tipping Improper installation may result in water spillage or injury...
Page 14: ...ce Fig 3 Voltage of the power source 115 V 60 Hz Receptacle of the power source NEMA reference 5 20R The equipment has a NEMA 5 20P plug If not it is necessary to install 5 20R receptacle by qualified...
Page 15: ...rature rise may cause the damage to the articles in the chamber WARNING Fix the shelf supports and shelves securely Incomplete installation may cause injury or damage Operation after power failure The...
Page 16: ...load is 86 o C when the ambient temperature is 30 o C The setting mode returns to the temperature display mode automatically when 90 seconds has passed without any key operation In this case any setti...
Page 17: ...Press set key SET The current setting is displayed and the first digit is flashed 5 Scroll the figure to 005 by using digit shift key and numerical value shift key When pressed the figure of settable...
Page 18: ...s flashed 3 Set the figure to F25 with the digit shift key and numerical value shift key The settable digit is shifted When pressed the figure of settable digit changes 4 Press set key SET The current...
Page 19: ...dication after operation 1 The current chamber temperature is displayed 2 Press numerical value shift key for 5 seconds The first digit is flashed 3 Set the figure to F05 with the numerical value shif...
Page 20: ...current chamber temperature is displayed 2 Press numerical value shift key for 5 seconds The first digit is flashed 3 Set the figure to F04 with the numerical value shift key When pressed the figure o...
Page 21: ...displayed Decrease of cooling performance or durability of refrigerating circuit Examination is air conditioning of installed site Notice of low voltage When a power supply voltage decreased in about...
Page 22: ...ent tone Remote alarm If the filter sensor is disconnected Alarm lamp is flashed E05 and chamber temp are displayed alternately Intermittent tone Remote alarm If the filter sensor is short circuited A...
Page 23: ...ssor and other mechanical part are completely sealed This unit requires absolutely no lubrication Check the backup cooling kit by pressing test switch once a month if it is installed Remove the frost...
Page 24: ...r all the contents to another freezer or a container which is refrigerated by liquid carbon dioxide or dry ice 3 Turn off the power switch of the freezer 4 Open the outer door and inner door Remove th...
Page 25: ...t The pipe of the air intake port is thrust with a stick for air intake port cleaning of the accessories and frost is taken An outside door does not open even if the cap of the air intake port is open...
Page 26: ...e condenser filter is clogged Always clean the condenser filter when the filter check lamp is lit The outer door is not shut tightly The inner door is not installed correctly The set temperature in th...
Page 27: ...by appropriate personnel Always remove doors to prevent accidents such as suffocation Recycle of battery The unit contains a rechargeable battery The battery is recyclable At the end of it s useful li...
Page 28: ...the electric shock Disposal of nickel metal hydride battery 1 Turn off the power switch and disconnect the power supply plug 2 As shown in the Fig 2 remove six screws fixing the side cover and switch...
Page 29: ...ess both sides of the pen arm as indicated by the arrows to open the head clamp at A and B See to Fig 2 illustration 1 4 Position the Ink pen so that the guide pins fit into the guide holes on the pen...
Page 30: ...as the 32 day time scale Fig 4 Stopping recording 1 Turn OFF the power switch 2 When recording is stopped for a prescribed period place the caps back on the Ink pen to prevent the ink from evaporating...
Page 31: ...is the time when 70 o C can be holding for Liquid CO2 backup cooling kit Keep a liquefied CO2 cylinder at less than 31 o C The above data is the experiment value which uses liquid CO2 30L no load Amb...
Page 32: ...CKUP When turning on the backup cooling kit the backup standby lamp is brightened This means that the backup cooling kit is ready To stop the operation of the backup cooling kit turn off this switch 2...
Page 33: ...ete installation may cause injury or damage Take care when handling inventory rack as you may be injured if inventory rack drop on your leg Shelf support Shelf stopper No 4 under second screw from the...
Page 34: ...denser High stage side Fin and tube type Low stage side Shell and tube type Refrigerant High stage side R 404A Low stage side R 508B Temperature controller Microcomputer control system Temperature dis...
Page 35: ...load Temperature control range 50 o C to 86 o C ambient temperature 30 o C no load Power voltage AC 115 V Rated frequency 60 Hz Rated power consumption 1020 W Noise level 49dB A background noise 20 d...
Page 36: ...nit interior No contamination Decontaminated Contaminated Others 3 Instructions for safe repair maintenance of the unit a The unit is safe to work on b There is some danger see below Procedure to be a...
Page 37: ...Printed in Mexico 7FB6P15164700 08 November 2013...
