USER MANUAL LEEC WARMING CABINET
Contents
1. eo INSTALLATION AND SET UP UNPACKING WARMING CABINET Instructions Remove the warming cabinet from its protective cardboard packaging To do this carefully undo one side of the cardboard packaging and gently slide the warming cabinet out Position the warming cabinet in the laboratory either on the laboratory bench or under the bench It is recommended that if the warming cabinet is to be placed under the laboratory bench it is raised off the floor sufficiently to reduce the risk of contamination from the floor entering into the warming cabinet inner chamber LEEC manufactures an under bench stand for the warming cabinet range to raise the warming cabinet sufficiently off the floor Please contact LEEC if this is required Level the warming cabinet using the 2 independent adjustable feet at the front of the warming cabinet and secure this position by tightening the locking nut using a 10mm spanner It is recommended that a bubble spirit level is placed in the centre position of the middle shelf in the warming cabinet to check for level from left to right and front to rear Please refer to your employers organisation Safe Manual Handling Policy The Manual Handling Operations Regulations 1992 before attempting to lift the warming cabinets The weights are as follows C100 54kg C157 70kg and C330 107kg CONNECTION TO THE ELECTRICAL SUPPLY Your LEEC warming cabinet is supplied with a 2 metre mains cable Connect th2. to chlorine NB Never use the following substances chemicals reagents to clean the stainless steel inner chamber as permanent damage may result Sodium Azide Aqua Regia lodine Ferric Chloride Sulphuric Acid Always avoid any Chlorine based chemicals including bleach WARRANTY PREVENTATIVE MAINTENANCE All LEEC Classic Warming cabinets are supplied with a 1 year manufacturer warranty Warranty Card To register your warranty please fill in the User Guarantee Hegistration Card and post to LEEC Limited or to the Distributor that supplied your warming cabinet if outside the United Kingdom All LEEC warming cabinets are built to the highest standards and all manufacturing processes are compliant to ISO 9001 All LEEC warming cabinets are built fully tested then factory calibrated to UKAS traceable standards This Classic Warming cabinet is built to last for many years but to ensure this unit continues to function at its optimum performance levels it is recommended that a Preventative Maintenance Calibration Contract is purchased from LEEC Limited after the units 1 year warranty period If the warming cabinet is outside the United Kingdom please contact the Distributor the unit was purchased from for further information on Preventative Maintenance Contracts
3. 1 2 3 4 5 6 7 USER MANUAL LEEC WARMING CABINET W100 W157 and W330 CONTENTS GENERAL DESCRIPTION INSTALLATION AND SWITCHING ON WARMING CABINET PROGRAMMING TEMPERATURE OVERTEMPERATURE CUT OUT WARMING CABINET USEAGE CLEANING amp DISINFECTING WARRANTY PREVENTATIVE MAINTENANCE v1 0 March 2009 LEEC Limited Private Road No 7 Colwick Industrial Estate Nottingham NG4 2AJ Tel 0115 961 6222 Fax 0115 961 6680 E mail sales leec co uk Website www leec co uk 1 0 1 1 1 2 1 3 1 4 GENERAL DESCRIPTION Model W100 100 litre chamber capacity Model W157 157 litre chamber capacity Model W330 330 litre chamber capacity CONSTRUCTION HEATING AND INSULATION Even heating throughout the entire chamber is ensured by the LEEC designed heating element The low wattage element is bonded to the outer surface of the chamber walls ensuring quick heat conduction and low heating element temperature only a few degrees above the warming cabinet operating temperature New profiled resistive wire heating elements and high performance insulation ensure optimum temperature control All models have gentle fan assisted air circulation This ensures even temperature distribution throughout the chamber Fast temperature recovery keeps heat loss to a minimum after door opening TEMPERATURE CONTROLLER A very easy to program electronic PID temperature controller is fitted to the LEEC warming cabinet range T
4. e moulded plug to the 230V 50 Hz mains supply and the IEC connector to the socket at the rear of the warming cabinet Please make sure that the IEC connector is pushed in securely The mains cable wiring is colour coded as follows e BROWN LIVE e BLUE NEUTRAL e GREEN YELLOW EARTH Your LEEC warming cabinet requires a 230V 50Hz mains supply Once the warming cabinet is situated in the correct position in the laboratory plug the warming cabinet into a 230V 50Hz mains socket 2 4 To switch On the warming cabinet press in the Power button on the front facia panel This button will illuminate Green when power is On Front Facia Panel Power On The warming cabinet display will now light up displaying both the programmed temperature SET and actual inner chamber temperature ACT and the Heater H LED on the display indicates when the heaters are active The warming cabinet will now heat up to the programmed temperature 2 5 Fuses A 5 Amp fuse is fitted to the Mains Plug At the rear of the warming cabinet there are two internal protection fuses A 5 Amp internal fuse This provides additional protection to the mains plug fuse A 3 15 Amp Heater fuse This provides additional protection to the warming cabinet heating elements 2 6 Precautions A qualified electrician or other competent person must carry out any electrical work required to install the warming cabinet Do not place the warming cabinet in direct sunlig
5. his controller is easy to use and enables quick programming of the warming cabinet chamber temperature In addition this temperature controller has built in under temperature low level alarm and over temperature high level alarm functions The low and high level alarm limits are factory set to 2 0 C above below programmed temperature respectively after a delay of 2 minutes INDEPENDENT OVER TEMPERATURE SAFETY CUT OUT An independent fail safe over temperature safety cut out is fitted to this warming cabinet The over temperature cut out is factory set to 40 C but can be adjusted by the customer refer to section 4 3 In the extremely unlikely event of the warming cabinet temperature controller failing on the over temperature safety cut out will disconnect the heaters This device once tripped has to be manually reset Refer to section 3 6 for instructions to reset CIRCULATION FAN The internal fan helps to achieve accurate temperature uniformity throughout the inner chamber It also helps to enhance temperature recovery when the chamber is heavily loaded The fan is located at the top of the chamber Air is drawn up through the chamber circulated around the full width ducting and returned to the chamber floor The fan also improves temperature recovery after inner glass door opening A micro switch disconnects the fan upon opening the door to minimise temperature loss to the chamber environment during door opening 2 0 2 1
6. ht or near a heat source Make sure the warming cabinet is not standing on its electrical supply cable Before any cleaning or maintenance work is carried out the mains supply must be switched off and the plug removed from the electrical socket 3 0 PROGRAMMING 3 1 TEMPERATURE DISPLAY The programmed temperature Set Point SET is displayed in Green and the Actual Chamber Temperature inside the Warming cabinet Inner Chamber ACT is displayed in Red A Red LED Indicator next to the letter H Heaters on the display illuminates when the heaters are on When the chamber temperature is very close to programmed set point temperature it is normal to see this LED flashing A Red LED Indicator next to letter A Alarm on the display will illuminate if the chamber warming cabinet temperature deviates to either the Low or High alarm limits of 2 0 C after a delay of 2 minutes 3 2 TO PROGRAMME CHAMBER TEMPERATURE 1 Press the P button on the controller once and release 2 SP1 in Flashing Red is now displayed on the screen 3 Press either the A button to increase the set point temperature or the Y button to decrease the set point temperature Set Point Temperature is displayed in Green 4 Press the p button again to return to the normal screen that displays both the Chamber Temperature in Red and Programmed Set Point in Green 5 The Temperature can be programmed between a Set Point Temperature of 20 C to a maximum
7. if higher than 37 0 C programmed temperatures are programmed In the extremely unlikely event of the warming cabinet temperature controller failing on the over temperature safety cut out will disconnect the heaters This device once tripped has to be manually reset refer to section 3 6 for resetting instructions There is an Audible Alarm when the independent over temperature cut out is activated the illuminated Green Power On Switch on the front facia panel will change to Red in the event of the over temperature cut out being activated Normal Status Green Over Temperature Cut out Activated Red 4 2 RESETTING OVER TEMPERATURE CUT OUT In the unlikely event of the over temperature safety cut out activating this can be reset by Pressing in the Red Button at the Back of the warming cabinet Over Temperature Cut out at Rear of Warming cabinet Push In Red Button to Reset 4 3 PROCEDURE FOR PROGRAMMING OVER TEMPERATURE CUT OUT IF OPERATING TEMPERATURE IS ABOVE 37 0 C If the warming cabinet set temperature is above 37 0 C the procedure to set the over temperature cut out is as follows 1 At the rear of the warming cabinet locate the over temperature cut out adjustment screw turn this screw fully clockwise to raise the cut out to maximum 2 Programme new set point temperature on temperature controller Allow time for the warming cabinet to stabilise at this new set point temperature 3 Gently turn the over temperature cut
8. of 60 C The practical minimum operation temperature of the Warming cabinet is 5 C above ambient temperature The warming cabinet is factory set to operate at 37 0 C unless otherwise specified Allow the temperature to stabilise for at least 24 hours before use 5 3 3 HIGH amp LOW LEVEL TEMPERATURE ALARM SETTING The Low Temperature Alarm is factory set to 2 0 C below the set point programmed temperature The High Temperature Alarm is factory set to 2 0 C above the set point programmed temperature NB There is a dwell period of 2 minutes factory programmed into the controller to allow sufficient time for the chamber temperature to recover within the low high alarm set points to prevent the alarm from activating immediately after the inner glass door is closed 3 4 AUDIBLE ALARM 4 0 A Red LED next to letter A Alarm on the display will illuminate if the chamber warming cabinet temperature deviates to either the Low or High alarm limits of 2 0 C and an audible alarm will activate To cancel the audible alarm Press and hold the V button for 3 seconds If the Low High alarm values or the 2 minutes dwell need to be adjusted then please contact LEEC Limited for instructions INDEPENDENT OVER TEMPERATURE SAFETY CUT OUT 4 1 An independent fail safe over temperature safety cut out is fitted to this warming cabinet The over temperature cut out is factory set to 40 C but can be adjusted by the customer
9. out adjustment screw back anti clockwise until the warming cabinet over temperature cut out activates The Power switch on the facia panel will illuminate RED and audible alarm sounds Then gently increase the over temperature cut out by turning the adjustment screw a small increment clockwise 4 Press the Red reset button refer to section 4 2 5 0 WARMING CABINET USEAGE To ensure that the temperature uniformity inside the inner chamber remains within specification it is important not to overload each shelf 6 0 CLEANING and DISINFECTING 6 1 6 2 7 0 It is recommended that the exterior of the warming cabinet is kept clean by wiping over with a non abrasive soft damp cloth using a warm soapy water solution It is very important to thoroughly dry the exterior after cleaning It is advisable to clean the inner chamber regularly To clean the inner chamber use a 70 isopropanol alcohol 30 distilled water solution Apply using a sterile cloth so as not to introduce any contamination and wipe over all the surfaces of the stainless steel inner chamber The inner chambers of LEEC warming cabinets are made from the finest quality stainless steel However corrosion can still result from improper use of fungicides and bactericides Never use any Chloride based chemicals for cleaning as this can result in permanent damage to the stainless inner chamber and this is not covered by LEEC warranty as no stainless steel is completely resistant
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