Isotemp Large Capacity Refrigerated Incubator

Transcription

1 Isotemp Large Capacity Refrigerated Incubator Instruction Manual Models 304 and 304R Cat. No and R /16/06

2 Table of Contents Safety Information...3 Alert Signals...3 Warning...3 Caution...3 Important...3 Introduction...4 Specifications...6 Power Requirements...6 Dimensions...6 Operating Environment...6 Performance Characteristics...6 Unpacking and Installation...7 Packing List...7 Installation...7 Chart Recorder Activation (Model 304R)...8 Installation of Caster...8 Controls...9 Display and Indicators...9 Operation...10 General Function Checks...10 Controller Operation...10 Changing Chamber Temperature Control Setpoint...11 Accessing Controller Menus...12 Alarm...13 Safety Thermostat...14 Maintenance...15 Cleaning...15 Defrosting...15 Calibration...16 Repair...17 Alarm and Alarm Battery Test...17 Replacing Alarm Batteries...17 Replacing Temperature Controller, Alarm or S Replacing RTD Temperature Sensor...18 Replacing SSR1, K1, K2, T1 or T2 (Model 304R)...19 Replacing FANs or THM Replacing Keyed ON/OFF Switch or Convenience Outlet...20 Replacing Chart Recorder (Model 304R)...20 Accessories and Replacement Parts...21 Troubleshooting...22 Wiring Diagram...23 Warranty

3 Safety Information Alert Signals Warning Warnings alert you to a possibility of personal injury. Caution Cautions alert you to a possibility of damage to the equipment. Note Notes alert you to pertinent facts and conditions. Warning This manual must be carefully read and thoroughly understood before operating the unit, failure to follow directions or precautionary measures could result in serious adverse effects. This equipment must be used only as specified in these instructions. This equipment is intended for indoor use only. This equipment must be earth grounded for safe operation. Maximum ratings of accessories that may be plugged into convenience outlet: Load current 2 115VAC, Leakage Current 250 micro Amps. Hot Surface Hot surfaces alert you to a possibility of personal injury if you come in contact with a surface during use or for a period of time after use. Caution The aluminum evaporator and other portions of these units should not be exposed to the corrosive effects of acidic or caustic materials. Extreme care must be exercised if such materials are stored within to prevent voiding the warranty. This Incubator is NOT suitable for flammable material storage. Important When operating at 100% cooling, the compressor runs continuously and thus cools continuously. If no manual defrosting is conducted for over 2 weeks, ice will build and the unit will not maintain temperature. See Defrosting. 3

4 Introduction The Large Capacity Refrigerated Incubator offers laboratories precise temperature control over the -15 C to 50 C range. Performance meets requirements for the preservation of vaccines, biologicals, incubation of bacterial cultures, and determination of biochemical oxygen demand of sewage. The extended operating temperature range also includes temperatures associated with drug stability projects, dairy product evaluation and entomological studies. Features include: CFC-Free Refrigerant: R404A Storage capacity: 30.4 cubic feet (0.86m3) Accommodates 368 BOD bottles, up to 600 bottles with additional shelves, shelves can handle up to 100 lbs sample weight each.. Temperature range is -15 C to +50 C White enamel coated steel exterior and interior Foamed in polyurethane insulation Door mounted microprocessor based controller Power ON/OFF Receptacle Digital temperature readout to 0.1 C Cooling control modes: High precision with cooling (100% mode) High precision without cooling (00% mode) Frost free with variable cooling (50% mode) Protected setpoint mode to prevent accidental change 4 adjustable (0.5 adjustment slots) wire shelves Two small top shelves: 19 5/16 x 31 7/16 (49 x 79.9 cm), load capacity 100 lbs each Two large bottom shelves: 21 9/16 x 31 7/16 (54.8 x 79.9 cm), load capacity 100 lbs each Front Panel 1 removable trivet on floor: 21 9/16 X 9 1/2 Door activated 40 watt interior incandescent shatterproof light 4

5 INTRODUCTION Door activated fan suppression to preserve atmosphere Solid state relay for the heater Visual and audible battery backed power-out alarm Visual and audible over/under temperature deviation alarm when temp deviates +/- 5 C Contacts for remote alarm with delay activation Runaway temperature guard disables heater and receptacle when temperature reaches 65 C Safety relay and LED to interrupt power when chamber temp is outside limits 1/2 hp compressor, relay for energy conservation Compressor overload relay RTD temperature probe 2A convenience outlet inside chamber with 2A fuse on back panel Shipped with four 1.5, screw in, adjustable feet Optional casters included Keyed on/off switch, mounted in chamber Door lock with key Includes 7 day, 6 circular chart recorder (Model 304R only) CSA/NRTL approved Two years warranty parts, labor and travel 5

6 Specifications Power Requirements 115V +/- 10%, 60Hz, 1725W, 15 Amps, Including 2 Amps for convenience outlet. Equipment requires circuit with 20A Circuit Breaker and receptacle type NEMA 5-20R. Dimensions External Dimensions Height: Width: Depth: Internal Dimensions 74 (188.0cm) 35 (88.9cm) 35 (88.9cm) Height: 65.5 (166.4cm) Width: 32 (81.3cm) Depth: 25 (63.5cm) lower half Depth: 23 (58.4.5cm) upper half Net shipping weight: 360 lbs (163 kg) Operating Environment Temperature Range: 10 C to 40 C Humidity Range: 0% to 90% RH Maximum Altitude: 6600 ft (2 km) Air clearances: Back, top and sides 3.0 min. Over voltage Category: II (IEC664) Pollution Degree: 2 (IEC664) Performance Characteristics: Operating Range: -15 to +50 C Uniformity: ±1.0 C 1 Stability: ±0.5 C 1 Display Readability: 0.1 C Maximum Sound Level 65 dba 1 Per ASTM method E , cooling modes 00 and 100 6

7 Unpacking and Installation Note If damage is observed, keep the shipment intact (including the carton and all packing material) and file a claim with the final carrier. Remove shipping box by cutting bands that attach box to pallet then lift box off. Note The incubator may be lifted using a fork-lift or jack placed under the sides for the unit. Packing List Item Qty Large Capacity Refrigerated Incubator 1 Incubator Instructions 1 Top Shelf 2 Bottom Shelf 2 Shelf Clip 16 Trivet 1 Caster Kit 1 Key, Door 1 Key, Power On/ OFF 2 Charts for Recorder -50 to +50 (Model 304R) 60 Charts for Recorder, 0 to 50 (Model 304R) 60 Instructions for Chart recorder (Model 304R) 1 Installation The Large Capacity Refrigerated Incubator should be installed on a level, stable floor. Use the adjustable feet to level the incubator. Locate the unit so that there is at least 3 inches of clearance around the sides, top and back to ensure sufficient ventilation. Note: When cooling is enabled, heat is dissipated on sides of unit resulting in side temperatures of 35 to 55 C. To prevent heat build up within the unit, do not install it where it will be exposed to strong sunlight, nor near radiators, furnaces, or other sources of heat. Do not install the incubator where flammable or corrosive atmospheres may exist. 1. Remove Caster Kit, Shelves and Instructions from inside chamber. 2. Remove 4 bolts in bottom of wooden shipping pallet, which hold the incubator to the pallet. If the adjustable feet are to be used, screw them back into same holes. If the optional casters are desired, then refer to the Caster Assembly instructions included in the Caster Kit. 3. Remove all protective tape from doors and shelves. 7

8 UNPACKING AND INSTALLATION Shelf Shelf Alignment Peg Shelf Clip 4. Remove kick grill at bottom-front of incubator, check that drip pan is resting on its support bracket and that front and back drain hoses, from the chamber, empty into pan. Replace grill. 5. Place 4 shelf clips at each shelf location then install the shelf. Note that the shelves have alignment peg on the bottom, that go between the shelf clips. (See picture at left). The two shorter shelves go at the top, while the two longer shelves go at the bottom. 6. Uncoil line cord from rear of unit. Connect the plug to a power outlet that complies with the electrical requirements specified on the unit's label and with proper safety ground connection. If line cord replacement is necessary, use CSA type SJT, 14 GA, 3 conductor with NEMA 5-20P plug. Chart Recorder Activation (Model 304R) The chart recorder is configured for a temperature range of 50 C to +50 C and has the 9V battery installed. Refer to the Chart Recorder manual for details. 1. Remove any tape used for shipping, replace chart paper if necessary. 2. With power to incubator on, press 1/0 power switch on the recorder, the recorder arm should begin to move to the correct chamber temperature. Note If other recorder settings are desired or 9V battery needs replaced refer to the chart recorder instruction manual. 3. If desired, the chart day may be synchronized to current day and time. 4. Press Pen Home button, once the pen reach home position, press the Chart Rotation button to advance the chart to the present day and time. 5. Press the Pen Home button again to begin recording. Installation of Caster Refer to CASTER ASSEMBLY instructions in Caster Kit 8

9 Controls Keyed Power ON/OFF Switch: Located on back wall at bottom of chamber, is used to turn power (1) ON or (0) OFF to entire unit. Alarm On/ Off Switch: Located on front panel, is used to enable or disable alarm. Alarm Test Push Switch: Located on front panel, is used test alarm and batteries. Keys: Located on front panel. MENU - Used to access controller menus. SET - Used to display and change settings. INCREASE setting. DECREASE setting. Display and Indicators Controller Display: (Front Panel) Displays chamber and set point temperatures in C and prompts from menu. Controller Indicators: (Front Panel) Delay: Lit when delay start timer for compressor is timing. Will begin timing when power is first applied or when cooling compressor is turned off. Safety: Indicates that the chamber temperature is not within limits and the safety relay is opened. Cool: Lit when cooling compressor is on. Heat: Lit when controller demands heat. Alarm Indicators: (Front Panel LED and Beeper) Indicates that the chamber is 5 C or more above or below the setpoint temperature or that the power has failed. 9

10 Operation General Function Checks Perform this procedure if incubator is new or hasn't been operated for a long period of time. 1. Apply power by placing the Power ON/ OFF switch (Located inside chamber) to I (ON) position. The Controller, on front of door, will display L, then, 88.8 (to test display), then begins reading actual chamber temperature. Note: When power is first applied, if display indicates S instead of L, a switch setting on the controller must be changed. Refer to Replacing Temp Controller TC1. 2. After 3 seconds, the Safety LED on the controller should extinguish and the safety relay will close applying power to the heater, fan, compressor relay and convenience outlet. 3. Press and hold MENU key, after 3 sec. the display will indicate CAL. Release and press MENU again to display Pct, press SET, display should indicate 100. Press and release MENU again to indicate Pro, press SET, display should indicate 00, press and release MENU to return to normal control mode. Press SET to display control setpoint, display should read If the control setpoint or any of the other parameters aren't set correctly, use the or keys while pressing SET to change the setting. 4. The DELAY LED will be lit for 7 minutes after power is first applied, the COOL LED will be out during this delay period. When the DELAY LED goes out, the COOL LED will light and the compressor relay will close starting the compressor. 5. Allow unit to stabilize for 1 hour at 25 C, to ensure that all systems are functioning. 10 Controller Operation Usually the only controller setting that is necessary to change is the chamber temperature control setpoint. Other parameters of the controller may be changed by accessing them through the menu key, covered later.

11 OPERATION Changing Chamber Temperature Control Setpoint 1. The chamber temperature is continuously displayed, unless a key is pressed. 2. To display the setpoint temperature, press the SET key. The setpoint temperature will remain on the display for 1 sec. after the SET key is released. 3. To change the setpoint temperature, press and hold SET while pressing the or keys (Note that when either or keys are first pressed, the display will begin to change slowly at first, then increase change rate after a few seconds.) 4. Select the desired chamber setpoint then release all keys. The controller display will revert back to actual chamber temperature after a few seconds. Allow up to an hour for unit to stabilize at the new setpoint temperature. After the incubator temperature has stabilized, place samples into incubator chamber. For best results, arrange samples evenly throughout the chamber. Liquid samples should be covered to prevent evaporation and eventual frost build up on evaporator coils, particularly when operating below ambient. The Large Capacity Refrigerated Incubator has an internal 2 amp. convenience outlet inside chamber to operate devices such as: shakers, rotators, photosynthesis lights, recording thermometers etc. 11

12 OPERATION Accessing Controller Menus The temperature controller has three menu selections that can be accessed by pressing and holding the MENU key for 3 seconds. To access menu parameter, press and hold the SET key. To change the parameter, use the or keys. CAL Menu- Calibration Menu is used to change the temperature offset value to correct for differences in chamber temperature and the displayed temperature. Range -5 to 5 C. See Calibration Procedure. Pct Menu- (Percent Cooling Menu) Used to select one of three cooling modes: 100% Mode- Compressor runs continuously which provides high precision control (+/-0.5 C stability) over entire temperature range. Requires manual defrosting. 50% Mode- Compressor runs approximately half the time, which conserves power and also prevents and eliminates frost buildup inside chamber. This method eliminates the need for manual defrosting but provides less temperature stability (+/- 1.5 C). 00% Mode- Compressor is completely off. This mode is ideal for incubating samples at temperatures 10 C or higher above ambient (35 C to 50 C). It provides the greatest power savings, yet still maintains the advertised stability. Pro Menu- Protection Menu - Used to select the Protection mode of operation that determines when the alarm is activated and if the control setpoint can be changed. Range 0.0 to Mode- Normal mode that allows the user to change setpoint. Safety activates if chamber temperature (Chamber) and setpoint temperature (Setpoint) are as follows: Chamber 15.0 C and chamber < (Setpoint -6) or Chamber 40.0 C and chamber > (Setpoint +6) While SAFETY is activated, the safety relay is opened interrupting power to the heater, fan, convenience outlet and compressor. When chamber temperature returns to acceptable limits, the SAFETY will automatically terminate 12

13 OPERATION and power is reapplied. In order to allow changing of setpoint and eliminate nuisance alarms, a SAFETY by-pass takes effect when the setpoint is changed or when power is first applied. The SAFETY by-pass works as follows: Present chamber temperature is stored as a nominal safety temperature (nominal). If Chamber < Setpoint then SAFETY = nominal -2. If Chamber > Setpoint then SAFETY = nominal +2. If chamber should go beyond SAFETY then the SAFETY will activate. This SAFETY by-pass is active until chamber reaches setpoint ±1 C. 0.1 Mode- Same as 0.0 Mode, except that the setpoint is locked and can't be changed. Alarm The alarm beeper and LED are activated any time the chamber temperature goes beyond 5 C above or below the set point except when power is first applied or if the set point is changed. When activated the alarm will beep and LED light every 3 sec. The alarm may be disabled with alarm on / off switch. The alarm will also activate if power should fail. The alarm board has relay contacts that can be wired to a remote dialer or alarm system. The contacts are C Common, NO Normally Open and NC Normally Closed, with.25 push-on terminals. The NC contact will remain open under normal operating conditions, but when the alarm is activated, the contacts will delay for 25 sec then close. Alarm Relay contacts are rated 125VAC. Wire to alarm NC and C terminals as follows: 1. Disconnect incubator from power source. 2. Open front panel bezel by removing 4 screws (8 on Model 304R) in top and bottom of bezel, carefully hang bezel from brackets using wire ties or other temporary means. 3. Remove the plastic hole plug on the right side of the controller bezel to route cable. 4. Locate Alarm PC board and terminals, wire the alarm board C terminal to terminal 4 of the alarm on/off switch. Wiring the alarm through the switch will allow the remote alarm to be disabled when the alarm on/off switch is in the off position. 13

14 OPERATION 5. Connect push-on terminals from your alarm cable to alarm NC terminal and terminal 5 of alarm on/off switch. Safety Thermostat As an added safety feature, the incubator has a thermostat in the heater compartment that limits the upper chamber temperature to 65 C in the event that all other controls fail. 14

15 Maintenance Warning To reduce the risk of electric shock, disconnect from power source before servicing. Before re-applying power, after maintenance is complete, check to ensure that safety ground is intact and making a good connection. Cleaning Warning! Do not attempt to clean the incubator while the unit is plugged into a power source. Immediately clean all spilled materials from the incubator and wipe dry. If necessary, moisten a cloth with soap and water and clean inside and out. Do not use any harsh chemical cleaners. Defrosting Periodic defrosting may be necessary depending on operating temperature, ambient humidity, moisture from samples and cooling mode. Time between defrosts may be from 30 days to years. Suggested Defrost Methods Method I: For control setpoint down to 10 C, this method is the least disruptive, if samples can withstand temperature stability of +/- 1.5 C for 24 hours. Samples may remain in chamber during this procedure. 1. (Refer to Accessing Controller Menus) Press and hold MENU key until CAL is displayed, then release and press MENU again until Pct is displayed. 2. Select 50 in the Pct menu then press MENU key twice to return control mode. 3. Allow incubator to remain in this mode for about 24 hours or until frost disappears. 4. Use the MENU key to re-establish the previous selection for Pct (i.e. 100). Method II: 1. Remove any samples that may be damaged by temperatures up to 35 C. 2. Refer to Accessing Menu section of manual and set Pct parameter to Place Setpoint to 35.0 C. 15

16 MAINTENANCE 4. Allow temperature to stabilize, for 1 hour. 5. After 1 hour, remove power from unit. Open door and wipe up any excess moisture on floor of chamber with paper towels or sponge. 6. Apply power and set desired operating parameters back into controller. After chamber temperature stabilizes, place samples previously removed back into unit. Calibration If it becomes necessary to calibrate temperature controller, perform the following: 1. Place an accurate temperature measuring device in the geometric center of the chamber. 2. Set the controller to the desired operating temperature in 100% cooling mode and allow 2 hours stabilization. 3. Note the chamber temperature on the controller display and the temperature at the geometric center. 4. Subtract the chamber display reading from the geometric center reading. 5. Enter into the Calibration Mode as described in Accessing Menu. 6. Press and hold SET key, using the or keys, set the calibration parameter to the value determined in step Allow unit to stabilize for 1 hour and check that controller value and geometric center value agree ±0.5 C. Repeat calibration if necessary. 16

17 Repair Alarm and Alarm Battery Test The alarm is battery backed so that if power is lost the alarm will beep and LED will light at 3 sec. Intervals. The alarm will also be triggered if the chamber temp deviates +/- 5 C from setpoint. When the Alarm Test Button, located on the front panel is pushed and held, the alarm is triggered and alarm power is switched to the battery. The alarm should begin within 10 sec as test button is held. Note that the Alarm On/ Off switch on the front panel must be On. If the alarm fails to activate, refer to Replacing Alarm Batteries. ORN Replacing Alarm Batteries 1. Disconnect incubator from power source. 2. The batteries for the alarm are located inside the front panel mounted on the door labeled Battery. 3. Turn the thumbscrew counterclockwise, then rotate the door down. 4. Note the direction of the old batteries, then pop them out and replace with four 1.5V, AA, alkaline batteries. Replacing Temperature Controller, Alarm or S2 1. Disconnect incubator from power source. 2. Open front panel bezel by removing 4 screws (8 17

18 REPAIR on Model 304R) in top and bottom of bezel, carefully hang bezel from brackets using wire ties or other temporary means. 3. Remove 4 screws that mount controller to mounting bracket. 4. Note wire colors and positions on TB1, TB2 and TB3, then remove all wires from old controller. 5. Locate switch DS1 on lower left corner of new controller and set the switches as follows: Set DS1-1 (A) to on (down). Set DS1-2 (B) to off (up). 6. Attach wires previously removed from old controller to new controller. 7. Mount new controller and bezel, then apply power. 8. Refer to Calibration section of this manual, to calibrate new controller. Replacing RTD Temperature Sensor 1. Disconnect incubator from power source. 2. Refer to Replacing Temperature Controller, but only remove sensor wires from TB2. 3. Open incubator door and remove sensor from clip on door panel. 4. Remove old sensor, then place new sensor on bracket. 5. Connect new sensor wires to controller then mount controller and bezel. 6. Apply power, then refer to Calibration section. 18

19 REPAIR Replacing SSR1, K1, K2, T1, or T2 (Model 304R): 1. Disconnect incubator for power source. 2. Remove 8 screws from back panel then rotate back panel from top. 3. Locate device to be replaced on back panel, then remove mounting screws. 4. Unplug quick connect terminals, noting positions. 5. Place quick connects on new device and mount on panel. (Note, T2 connections must be cut then spliced.) 6. Replace back panel, then apply power. 7. Refer to General Functional Checks in the Operation section to ensure that new device is operating. Replacing FANs or THM1: 1. Disconnect incubator from power source. 2. Remove shelves from chamber area. 3. Remove 6 screws from fan panel at top-rear of chamber. 4. Rotate fan panel down to expose components. 5. Replace desired part, then coat electrical connections with RTV102 or other electrical insulator. 6. Re-assemble in opposite order as previously described. Be sure to install gaskets on either side of fan panel. 7. Apply power, refer to General Functional Checks in the Operation section to ensure that new device is operating. 19

20 REPAIR Replacing Keyed On/ Off Switch or Convenience Outlet 1. Disconnect incubator form power source. 2. Remove cover from weatherproof switch/ outlet box mounted on inside back wall of chamber. 3. Remove screws that secure defective component, then remove wire connections. 4. Replace defective component then reassemble. Replacing Chart Recorder (Model 304R): 1. Remove 4 screws that secure chart recorder, then pull recorder out of front panel. 2. Unplug thermocouple sensor from recorder. 3. Cut black and black/white power wires from old chart recorder. 4. If desired, the chart recorder thermocouple sensor may be replaced or the old sensor may be used. 5. Cut the power wires on new chart recorder about 24 from recorder, then splice new recorder into wires previously cut. Make sure that black goes to back and black/ white goes to black/ white. 6. The transformer T2 located on the back panel may also need replaced. Cut the wire length to 24 from T2 then refer to Replacing SSR1, K1, K2, T1, or T2. 20

21 Accessories and Replacement Parts Accessories Shelf, Small, Fits in upper section S Shelf, Large, Fits in lower section L Drip Pan for condensation P MODEL 304R only) Recorder Paper -50 to 50 F/C Recorder Paper 0 to 50 F/C Recorder Pen, Red Replacement Parts TC1 Controller PC Board Alarm PC Board Sensor, RTD SSR1 Solid State Relay K1 Safety Relay K2 Compressor Relay T1 Transformer THM1 Safety Thermostat S1 Keyed Power Switch S2 Alarm On/ Off Switch F1 Fuse, 20A, 125V, Slow-Blow,3AB F2 Fuse, 2A, 125V, 3AG Shelf Support Clip Trivet, Floor Rack Light, 40W, Shatter Proof Caster with brake Caster without brake Chart Recorder, Temperature Compressor SPN SPN SPN88613 SPN88616 SPN SPN SPN88678 SPN88612 SPN SPN SPN SPN09562 SPN SPN SPN SPN SPN SPN SPN * Model 304R only 21

22 Troubleshooting Symptom Possible Cause Possible Solution to Condition Incubator controller isn t functioning, Power switch isn t ON Place Power ON/ OFF switch inside no lights etc. or no power to unit. chamber to ON. Check power outlet by plugging a known good device into it. Erratic temperature display Frost buildup. Look for frost Defrost per instructions. If possible readings above or below set point. inside chamber around operate in 50% Cooling Mode to avoid evaporator. frost buildup. Temperature uniformity in chamber Frost buildup or airflow Defrost per instruction. If airflow above specified limit. blocked by samples. blocked by sample containers, remove some to allow top to bottom airflow. Temperature readings too high or too Controller may need Refer to CALIBRATION section of this low compared to thermometer. to be calibrated. manual. Control goes into power on reset Inadequate line power. If line voltage is < 106 VAC while unit is sequence while operating. Test Line voltage of outlet running, then a higher capacity AC line to Incubator while unit is is required. operating. Compressor not operating while Compressor stalled and If line voltage is < 106 VAC while unit is COOL LED is lit. thermal overloads opens. running, then a higher capacity AC line Test line voltage of outlet is required. while operating. Temperature readings go far Open heater or heater Unplug unit from power then refer to below setpoint and trigger alarm control relay SSR1. replacing HTR1. Check heater with at 15 C. OHM meter, about 29 ohms. Temperature readings go far above Defective cooling relay, If compressor isn t running while Cool setpoint and triggers alarm at 40 C compressor or shorted LED is on then replace K2 relay. If or above. heater SSR1. Check if compressor is running and evaporator compressor is running, isn t cold then cooling system needs if so touch evaporator in repair. If evaporator is cold then SSR1 chamber, it should be cold. may be shorted. Controller display works but heater, Safety relay K1 not closing. K1 relay may need replaced. compressor and chamber fan don t. Display EEE/99.9 & Alarm 1 Open sensor or sensor Check sensor connection at controller. connection. Check sensor with ohm meter, 100 ohms at 0 C and 110 ohms at 25 C. Display EEE/99.8 & Alarm 1 Shorted sensor or Check sensor connection at controller. connection. Display EEE/temp & Alarm 1 Incubator needs defrosted See erratic temperature display readings. 1. Temp Limit = Temp (+/-6 C or more from setpoint) & (> 40 C or <15 C), safety relay opens. 2. Temp Alarm = Temp is +/-5 C or more from setpoint, safety relay closed, unit continues to operate. 22

23 Wiring Diagram S1 POWER OUTLET & SWITCH BOX J2 FAN 1 CHAMBER FAN 2 ORN 1 2 ORN YEL 1 2 WHT Low Temp Incubator Schematic GRN/YEL 3 RED 2 WHT F2 2 AMP 1 BLK HTR1 BLK BLK WHT BLU CHART RECORDER BEZEL ASSEMBLY 1 2 RTD SENSOR 1 0 RED 2 4 K2 1 0 BRN 4 K1 2 THM1 2 1 INTERIOR LIGHT BLK BLK SPLICE 10 LIGHT SWITCH BRN BLK FAN DOOR SWITCH BLU S2 YEL ALARM PT6 PT2 BLK ALARM PT1 RED C PT3 PT5 VIO NC NO TB2-1 TB3-1 TB1-5 TB3-2 TB2-2 TB1-7 TB1-6 TB1-4 TB1-8 * ORN * BRN * RED * BLU 2 RED + SSR1 - RED BRN 2 1 BLK BLU ORN SPLICE 4 BLK RED PT1 BLK B1 6V - PT4 ORN + TB1-3 CT1 SWITCH DS1-1 ON DS1-2 OFF (OFF IS UP) * GRN F1 20 AMP 1 BLK P1 GRN SPLICE 2 SPLICE 8 RED COMP SPLICE 5 SPLICE 3 RECORDER SENSOR TB1-1 TB1-2 MAIN CHASSIS WHT SPLICE 1 WHT WHT WHT WHT WHT RECORDER SPLICE (Model 304R) * BLK 5 T1 SPLICE 6 1 ORN COM (4) NO (2) K2 SSR K1 3 7 * = CONTROL CABLE 12VAC 7 2 WHT 3 ORN RECORDER POWER (Model 304R) TOP VIEW 4 8 TOP VIEW BLK BLK/WHT * WHT * VIO * YEL 8 4 SPLICE 7 WHT BLK BLK/WHT WHT 2 J3 3 ORN 1 GRN/YEL TOP VIEW REAR PANEL 1 5 T1 SIDE VIEW S2 REAR VIEW 23

24 Warranty Laboratory instruments and equipment manufactured by Fisher Scientific Company L.L.C. Laboratory Equipment Division (hereinafter called the Company ) are warranted only as stated below. Subject to the exceptions and upon the conditions specified below, the Company agrees, at its election, to correct by repair, by replacement, or by credit to the purchaser, any defect of materials or workmanship which develops within one year (13 months for refrigerator and freezer products) from the date of purchase by the original purchaser by the Company or by an authorized dealer of the Company provided that investigation or factory inspection by the Company discloses that such defect developed under normal and proper use The exceptions and conditions mentioned above are the following: a. The Company makes no warranty concerning components or accessories not manufactured by it, such as tubes, batteries, etc. However, in the event of the failure of any component or accessory not manufactured by the Company, the Company will give reasonable assistance to the purchaser in obtaining from the respective manufacturer whatever adjustment is reasonable in the light of the manufacturer s own warranty. b. The Company shall be released from all obligations under its warranty in the event repairs or modifications are made by persons other than its own service personnel or authorized dealer personnel unless such repairs by others are made with the written consent of the Company. c. THE COMPANY MAKES NO WARRANTY OF MERCHANTABILITY, FITNESS FOR ANY PARTICULAR PURPOSE, OR ANY OTHER WARRANTY, EXPRESS OR IMPLIED, EITHER IN FACT OF BY OPERATION OF LAW, STATUTORY OR OTHERWISE. d. The above warranty and the above obligations to repair, replace, or credit are complete and exclusive and the Company expressly disclaims liability for lost profits or for special, indirect, incidental, consequential, or exemplary damages of any nature whether attributable to contract, warranty, negligence, strict liability, or otherwise even if the Company has been advised of the possibility of such damages. e. Representations and warranties made by any person, including dealers and representatives of the Company, which are inconsistent or in conflict with the foregoing warranty shall not be binding upon the Company unless reduced to writing and signed by an officer of the Company Kerper Boulevard Dubuque, Iowa Phone: Fax: