Isotemp
®
Premium Ovens
700 Series
Operation Manual and Parts List
LT2148X1 (7006916) Rev. 3
© 2010 Fisher Scientific Inc.All rights reservedPrinted in U.S.A.
Page 1: ...Isotemp Premium Ovens 700 Series Operation Manual and Parts List LT2148X1 7006916 Rev 3 2010 Fisher Scientific Inc All rights reserved Printed in U S A Isotemp ...
Page 2: ... Model Size Voltage Forced Air Gravity 13247725F 6916 Small 2 5 cu ft 120V Forced Air 13247725G 6917 Small 2 5 cu ft 120V Gravity 13247726F 6918 Small 2 5 cu ft 240V Forced Air 13247726G 6919 Small 2 5 cu ft 240V Gravity 13247737F 6921 Medium 3 8 cu ft 120V Forced Air 13247737G 6922 Medium 3 8 cu ft 120V Gravity 13247738F 6923 Medium 3 8 cu ft 240V Forced Air 13247738G 6924 Medium 3 8 cu ft 240V G...
Page 3: ...justments and maintenance must be performed by qualified service personnel s Material in this manual is for information purposes only The contents and the product it describes are subject to change without notice Fisher Scientific makes no representations or warranties with respect to this manual In no event shall Fisher Scientific be held liable for any damages direct or incidental arising out of...
Page 4: ...d the equipment that has been put on the market after 13 August 2005 This product is required to comply with the European Union s Waste Electrical Electronic Equipment WEEE Directive 2002 96 EC It is marked with the WEEE symbol Fisher Scientific has contracted with one or more recycling disposal companies in each EU Member State European Country and this product should be disposed of or recycled t...
Page 5: ... quotation on our Extended Maintenance Program for our products Whatever products you need or use we will be happy to discuss your applications If you are experiencing technical problems working together we will help you locate the problem and chances are correct it yourself over the telephone without a service call When more extensive service is necessary we will assist you with direct factory tr...
Page 6: ...lacing the Door Handle 6 2 Replacing the Door Gasket 6 2 Accessing Electronics Compartment 6 3 Adjusting Door Cam 6 3 Replacing the Heater 6 4 Replacing the Cooling Fan 6 5 Replacing the Circulating Fan Motor 6 6 Replacing the Controller 6 7 Replacing the Solid State Relay 6 8 Replacing the Control Thermocouple 6 9 Rerplacing the Safety Relay 6 9 Troubleshooting 7 1 Replacement Parts 8 1 Schematic...
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Page 8: ...ondition is encountered or the temperature is being set The Small ovens accommodate a maximum of five shelves The Medium ovens hold eight shelves while the Large ovens each hold eleven Isotemp ovens incorporate a variety of safety features A safety backup is built into the controller software if the primary heater control fails the backup will maintain control at 5 C above the set point An alarm L...
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Page 10: ...6916 Small 2 5 cu ft Forced Air 13247725G 6917 Small 2 5 cu ft Gravity 13247726F 6918 Small 2 5 cu ft Forced Air 13247726G 6919 Small 2 5 cu ft Gravity 13247737F 6921 Medium 3 8 cu ft Forced Air 13247737G 6922 Medium 3 8 cu ft Gravity 13247738F 6923 Medium 3 8 cu ft Forced Air 13247738G 6924 Medium 3 8 cu ft Gravity 13247750F 6925 Large 5 cu ft Forced Air 13247750G 6926 Large 5 cu ft Gravity 13247...
Page 11: ...vens forced air 70 minutes Large ovens gravity 60 minutes Air Exchanges per hour Small ovens forced air 43 Small ovens gravity 24 Medium ovens forced air 29 Medium ovens gravity 16 Large ovens forced air 22 Large ovens gravity 12 BTU hr Output 100 C 200 C Small ovens forced air 1125 2750 Small ovens gravity 470 1325 Medium ovens forced air 1325 2925 Medium ovens gravity 1040 2025 Large ovens force...
Page 12: ...1872W 50 60 Hz Large ovens 13 247 750G 120V 15A 1800W 60 Hz 13 247 751G 240V 7 5A 1800W 50 60 Hz Chamber Volumes Small ovens 2 5 cu ft Medium ovens 3 8 cu ft Large ovens 5 0 cu ft Chamber Dimensions W x D x H Small ovens 18 x 18 x 13 5 in Medium ovens 18 x 18 x 20 in Large ovens 18 x 18 x 26 5 in Environmental Conditions Operating 17 C to 27 C 20 to 80 RH non condensing Installation Category II ov...
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Page 14: ...s are shipped in a single carton After unpacking locate each item shown in the list below Report any missing items by name and part number to your Fisher Scientific distributor In the event of shipping damage retain the shipping material and file a claim with the final carrier Item Shelves Small and Medium units One provided Large units Two provided Shelf Supports Small and Medium units Two provid...
Page 15: ...ts Caution See data plate on oven for voltage current and line frequency specifications Check that the power requirements of the oven will not overload the circuit s The 700 Series ovens feature a front panel mounted power switch which is a combination power switch and circuit breaker eliminating the need for separate fusing The circuit breaker will interrupt power in the event of an oven heater m...
Page 16: ...pplied to the oven heaters or that the control temperature is being set Each display field is discussed separately below Temperature Display In the normal operating mode shows the current oven temperature During programming indicates the oven set temperature target Heat Indicator Lights when power is being supplied to the oven heater Alarm Indicator Lights if the actual oven temperature exceeds th...
Page 17: ...le holding down the SET key increases the oven set temperature as indicated on the temperature display Pressing DECREASE while holding down the SET key decreases the oven set temperature as indicated on the temperature display Pressing SET causes the display to show the set temperature Used with INCREASE and DECREASE to change the set temperature With MENU to access entry of a temperature display ...
Page 18: ...riate arrow key To slowly increment or decrement the set temperature 1 at a time press and immediately release the arrow key Before operating the oven always observe the following Safety Precautions This unit is not explosion proof do not use in the presence of flammable or combustible materials fire or explosion may result Unit contains components which may ignite such materials Fumes and spillag...
Page 19: ...ill cause a corresponding shift in the alarm temperature Example If the set temperature is 150 C the alarm will trip at 155 C If the set temperature is changed to 200 C the alarm will follow the set temperature and trip at 205 C Changing the set temperature to a value more than 5 C below the present oven temperature will trip the alarm Power is removed from the heater when an alarm condition occur...
Page 20: ...ress INCREASE or DECREASE until the display indicates the desired offset 4 Release the SET key 5 Press MENU once to return to normal temperature control Examples 1 The displayed temperature is the result of algebraically adding the actual temperature to the offset value Thus if an offset of 3 is being used a measured temperature of 50 degrees will be displayed as 47 2 A test is to be performed at ...
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Page 22: ...e later sections when required If needed call Technical Services for assistance Caution Service procedures requiring access to the electronics compartment involve exposure to line voltage and should be performed only by qualified service personnel Disconnect oven from power source before attempting repairs s Caution Only factory authorized components should be used for all repairs Failure to use f...
Page 23: ...e pieces 7 Begin installing the replacement gasket at the joint position of the old gasket Stretch the replacement gasket around the corners of the liner to avoid bunching of the gasket material 8 Install a Phillips head screw as the gasket rounds each corner to keep the gasket properly stretched The screw goes through the liner pierces the gasket and threads into the door wrap 9 After all four co...
Page 24: ...cover in place with 2 screws To access the electronics compartment proceed as follows 1 Disconnect power cord from the electrical outlet 2 Open the chamber door Carefully remove and retain hardware from door hinges case side Set door aside 3 Slide the oven back until the front of the bezel control panel is at least three inches from the edge of the bench top 4 Prop up the oven front by placing a s...
Page 25: ...hers securing the heater leads then pull the lead terminals off the heater studs 4 Remove the two screws securing heater to cabinet Slide heater forward to disengage back heater clips lift back of heater up then slide heater back and lift out 5 Install replacement heater and re assemble oven by generally reversing the steps above 6 4 Isotemp Premium Ovens Fisher Scientific Section 6 Service Replac...
Page 26: ...of oven 6 Slide the oven back on the table plus a few inches to set the bezel on the bench and rotate the bottom of the bezel out from the oven The top clips will come loose but the wiring will still be connected 7 Carefully set the bezel on the bench 8 Remove the two fan power wires from push on terminals located on fan housing 9 Remove the three mounting screws holding the fan in place 10 Instal...
Page 27: ...ng and sliding it forward It may be necessary to use a flat blade screwdriver to assist in lifting the cover upward Set heater cover aside 9 Using an Allen wrench loosen set screw holding the fan blade onto the motor shaft Observe the shaft has a flat side to prevent the set screw from turning on the shaft 10 Locate the two electrical leads from the fan motor Remove the leads from the push on term...
Page 28: ...om bottom of oven 6 Slide the oven back on the table plus a few inches to set the bezel on the bench and rotate the bottom of the bezel out from the oven The top clips will come loose but the wiring will still be connected 7 Carefully set the bezel on the bench 8 Locate terminal blocks on controller remove all wires connected to controller Note color and location of wires 9 Remove four screws that...
Page 29: ...le plus a few inches to set the bezel on the bench and rotate the bottom of the bezel out from the oven The top clips will come loose but the wiring will still be connected 7 Carefully set the bezel on the bench 8 Consult the schematic and locate the solid state relay mounted on bezel 9 Remove four lead wires from their screw down terminals 10 Remove two Phillips screws which mount the solid state...
Page 30: ...the bezel on the bench 8 Consult the schematic and locate the safety relay mounted on bezel 9 Remove four lead wires from their push on terminals 10 Remove two Phillips screws which mount the safety relay to the bezel 11 Lift out the safety relay 12 Generally reverse the steps above to install the replacement safety relay and re assemble oven To replace a defective control thermocouple proceed as ...
Page 31: ...he thermocouple wire 11 Cut the thermocouple wire to remove the thermocouple sheath 12 Securely loop together the cut end of the defective thermocouple with the two leads of the replacement thermocouple Wrap tape over the length of the loops to secure them 13 Gently pull the defective thermocouple out through the electronics compartment while guiding fishing the replacement thermocouple into place...
Page 32: ...hermocouple Poor heater connections Tighten connections at terminal strip and or heater Defective heater element Check heater resistance on schematic at back of manual Replace heater unless approxi mately the same as schematic Defective controller Replace controller Defective solid state relay Refer to schematic and replace relay or safety relay Temperature Device disengaged or defective Replaceme...
Page 33: ... tem perature minus the high alarm limit Wait for actual temperature to cool to the set temperature Defective control thermocouple Replace thermocouple Faulty or broken connections Check thermocouple connections at rear of temperature controller Temperature off from independent ther mometer Calibration offset needs adjusted Begin by setting offset to 0 See Display Offsets continued ...
Page 34: ...40V PCX132 Thermocouple Assembly SPN 95603 Cooling Fan 120V FAX39 240V FAX40 Circulating Fan Motor 120V SPN95788 240V SPN95789 Door Handle SPN 104976 Shelf 13 247S Shelf Support two per shelf SPN 95635 Heater Assembly HTR Small 120V SPN 95695 Small 240V SPN 95736 Medium and Large 120V SPN 95696 Medium and Large 240V SPN 95737 Door Gasket Small ovens SPN 101908 Medium ovens SPN 101909 Large ovens S...
Page 35: ...cement Parts Item Part Number ref Circuit Breaker Single Pole 120V SPN 95765 Double Pole 240V SPN 95786 Door Assembly Small DR2034X6 Medium DR2033X6 Large DR2032X6 Solid State Relay SSR SPN 83917 Safety Relay K1 120V SPN 95770 240V SPN 95787 Thermal Fuse Assembly FZ2148X2 ...
Page 36: ...Isotemp Premium Ovens 9 1 Fisher Scientific ...
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Page 38: ...For customer service call 1 800 766 7000 To fax an order use 1 800 926 1166 To order online www fishersci com ...
