REF Series Undercounter Refrigerator
Contents
1. Remove 6 screws from panel holding controller to access back of controller With controller ON insert key into 5 PIN receptacle on controller back Push UP ARROW on controller front uPL displays followed by end Press SET end stops flashing TURN OFF refrigerator and remove key Turn refrigerator back on On J W E WD Programming key is now programmed Note An Err message displays for failed programming Push UP ARROW again to restart upload or remove key and abort Operation The temperature control board and probe indicate when the refrigeration system is required to turn on and off The refrigeration system removes heat from the cabinet interior and rejects it to the surrounding room air When the cabinet interior temperature reaches 4 F above the controller set point the probe signals the controller to turn the refrigeration system on The normally open controller contacts close and energize the evaporator and condenser fan motors and compressor The compressor uses a current style starting relay and a starting capacitor to start the compressor motor When the cabinet interior temperature falls to the set point the probe signals the controller to turn the refrigeration system off The controller contacts reopen which de energizes the evaporator and condenser fan motors and the compressor Any accumulated frost on the evaporator coils melts during the off cycle The condensate drains to a p2. 2 Remove lower front and rear panels Fig 10 1 Note Front louvered panel may be removed for more frequent cleaning of the condenser as needed 3 Remove drain pan Fig 10 2 4 Clean drain pan with a non abrasive non chlorinated all purpose detergent 5 Reinstall drain pan 6 Use a vacuum cleaner with brush attachment to clean condenser through lower front panel and compressor motor and related parts through lower rear panel 7 Reinstall lower rear and lower front panels Service Latch adjustment To adjust for proper latch engagement 1 Loosen striker plate mounting screws Fig 11 1 2 Move striker plate up or down as required and tighten screws 3 Test operation of latch To adjust for proper gasket seal 1 Loosen striker depth adjustment screw Fig 11 2 2 Adjust stop in or out and tighten screws 3 Test operation of latch Door gasket replacement 1 Remove existing gasket from mounting track 2 Verify mounting track is free of any remaining gasket material 3 Align new gasket with mounting track and press firmly in place 4 Open and close door checking for proper gasket seal without pinching against refrigerator 5 Adjust latch and or striker as necessary for proper door closure Slide out compressor tray Follett s slide out compressor tray allows technicians to partially slide the condensing unit from the refrigerator back without cutting refrigerant lines 1
3. Controller programmer key optional accessory Controller programming keys are available from Follett to provide fast and easy conversion of factory programmed controllers from F to C service part number 00131722 or back to F service part number 00130112 In addition both programming keys will accept user programmed cut out settings to allow fast and easy transfer of these user selected settings to multiple refrigerators Programming refrigerator from a key download Fig 9 1 Turn OFF refrigerator 2 Remove 6 screws from panel holding controller to access back of controller 3 Insert appropriate programmed key into 5 PIN receptacle on controller back y Probe I 4 TURN ON refrigerator AN A 5 Values from key automatically download to refrigerator dol L message blinks followed by end 14 3 6 7 2 Beee Controller 6 After 10 seconds display returns to current refrigerator Eme OOP Supply programming key temperature and controller will restart with new values accessory 7 Remove key Note An Err message displays for failed programming Turn refrigerator OFF then ON to restart download or remove key to abort Programming key from a refrigerator upload 1 If required re program your refrigerator to C using 00131722 or F using 00130112 Set the controller to the desired cut out temperature using the controller key pad
4. 15 Screws rear panel each 6 per panel 00105387 16 Condensate tray includes screws amp spacers 00103275 Not shown Key 00105072 17 Spacer condensate pan 00105098 Not shown Seal bushing rear panel 00114512 18 Finishing plug 00105536 Not shown Leveling leg 00128900 19 Strain relief power cord 00105403 18 Electrical components 20 Temperature controller 00128868 Not shown Temperature probe and harness 00130096 21 Power cord 00103903 22 Power switch recessed mount 00114371 Not shown Strain relief wiring front panel 00105577 Not shown Faceplate F 00129403 Not shown Faceplate C 00129411 Not shown Programming key F 00130112 Not shown Programming key C 00131722 Temperature alarm accessory Not shown Bottle kit includes bottle bracket and gasket 00113779 Not shown Controller kit includes battery probe and power supply 00108175 Not shown Gasket bottle 00112029 Not shown Bracket bottle 00112011 Not shown Bottle 00112037 Not shown Battery 00112177 Not shown Screws includes two for securing cover 00115063 Not shown Label controller cover 00115071 Not shown Temperature probe 00115097 Door brackets for medication dispensing systems Not shown Omnicell door bracket 00158014 Not shown Pyxis door bracket 00114702 EOLUETT 801 Church Lane s Easton PA 18040 USA Toll free 800 523 9361 610 252 7301 00128892R03 s aniren s U U Innovative solutions inspired by ice Fax 610 250 0696 lt www fol
5. RESET button to clear log Alarm operation facts The back up battery will continue to provide alarm protection during power failure but will alarm ONLY if temperatures go out of the selected range During power failure the alarm face will be dark but temperatures can be read by pressing the RESET button Because the temperature alarm display simulates the true temperature of stored medications rather than the air temperature inside the refrigerator we suggest that staff refer to the alarm display to log temperatures for JCAHO compliance Automated medication dispensing and inventory systems interface Pyxis Omnicell MedSelect etc Follett refrigerators and freezers are compatible with most major automatic medication and inventory systems In some cases a Follett bracket accessory is required Contact factory for further information Pyxis is a registered trademark of Cardinal Health in the United States and other countries Omnicell is a registered trademark of Omnicell Inc in the United States MedSelect is a registered trademark of AmerisourceBergen Technology Group in the United States 16 Replacement parts Evaporator Reference 5 Condensing unit Reference 11 Refrigeration Reference Description Part 1 Fan motor evaporator 00104919 2 Bracket fan motor 00104927 3 Fan blade 00104935 4 Fan guard 00104943 5 Evaporator includes parts above 00104885 6 Filter drier amp capillary tube 00103267 7 Com
6. Remove rear panel Fig 12 1 2 Remove two screws and spacers securing condensate pan and set pan aside Fig 12 2 3 Remove two bolts securing condensing unit to refrigerator base Fig 12 3 4 Gently slide condensing unit out Fig 12 4 Note Do not put undue strain on the refrigerant lines 11 Fig 11 Fig 12 Controller replacement 1 Disconnect power to unit a Push front panel rocker switch to OFF position b Switch circuit breaker to OFF position and disconnect power cord Remove 4 screws from front panel to access back of controller Disconnect front panel wiring harness from refrigerator at 5 pin connector Disconnect wiring from controller back Push in at center of orange brackets to release and slide brackets back and off of controller Push controller out through front of front panel Gently remove bezel from controller and install on replacement controller Insert controller through front of panel Slide brackets onto sides of controller and push against back of panel COMA J 0 W K Q M Reconnect wiring to controller k Reconnect 2 and 3 pin connectors to refrigerator wiring harness k N Replace front panel restore power and test operation Reprogram replacement controller if necessary Wiring diagram oe WHITE i C
7. 5 Connect refrigerant hoses to access fittings and measure air temperature at condensor intake grille 6 Verify correct pressures with the temperature chart below 7 Troubleshoot refrigeration system as needed Condensor inlet air temperature 70 80 90 Discharge pressure 198 230 270 Suction pressure 25 31 38 100 311 46 Note Do not attempt to obtain correct refrigeration pressures by adjusting the system charge Refrigeration system diagram i 5 5 i EVAPORATOR T CAPILLARY TUBE LOwWSIDE i SERVICE PORT COMPRESSOR 7 CONDENSER i D JE eres D i 1 N i is S i WS HIGH SIDE FILTER DRIER SASSSSSSSNT NSN SERVICE PORT HIGH PRESSURE LIQUID LOW PRESSURE LIQUID LOW PRESSURE VAPOR Refrigerator troubleshooting guide Before calling for service 1 Check that unit is plugged in 2 Test outlet with another appliance to verify power Symptom Possible cause Solution Refrigerator does not operate no components run 1 Power switch faulty or in OFF position loose conne
8. ONDENSING UNIT O O START CAP I pes a TA O WHITE START 1 SOR BLACK RELAY p 120 VAC COND Tea aa EAN TEMPERATURE is RAN CONTROLLER Doh 8 ey OE oad l i u BLACK a Gn 12 Refrigeration system The REF Series refrigeration system is designed to give many years of trouble free service Except for routine cleaning of the air cooled condenser and related parts the refrigeration system requires no service or maintenance The system uses a capillary tube and is critically charged Access fittings are provided for ease of service However the connection of refrigeration service hoses to the fittings will almost invariably result in a significant change in the system charge This change can adversely affect the performance of your refrigerator Therefore Follett recommends that if hoses are ever connected to the refrigeration system for service the refrigerant should be recovered the system evacuated and recharged by weighing in the correct refrigerant charge Note Do not charge the system by pressures Checking refrigeration system pressures 1 Remove the rear access panel Fig 12 2 Turn the power switch to the on position 3 Following the instructions on page 6 verify that the temperature controller is set to the original factory cut in setting of 38 F 4 Allow the refrigerator to operate and stabilize at least 30 minutes verifying the cut out temperature is being reached
9. REF Series Undercounter Refrigerator Order parts online wwwfollettice com Installation Operation and Service Manual Serial numbers B59000 to C45184 Following installation please forward this manual to the appropriate operations person ENERGY STAR BOLLE 801 Church Lane s Easton PA 18040 USA Toll free 800 523 9361 lt 610 252 7301 U Innovative solutions inspired by ice Fax 610 250 0696 lt www follettice com 00128892R03 Table of contents Welcome to Follett Installation procedures Installing NS osx eee ans veteran task baie erene USS SIGS Scanlan natok kale au e OS ah beeen Installing controller faceplate Changing controller settings Reversing door Controller KM w LS Q E E E E Operation 10 How the refrigerator WOrKS nn 10 Temperature COMMON araara a a aa E EEEE EEE nn 10 IO SON a annn a EA iaa Rai i 10 Cleaning 10 Service Information 11 Latch adjustment eaor aa a E EEEn 11 Gasket replacement 11 Slide out compressor Tray 11 Controller replacement 12 Wiring diagram 12 Refrigeration system diagram 13 Troubleshooting guide 14 Accessory 1nformation ecc cee cec cee ceetesteestesteesteneeestenees 15 Temperature alarm 15 PYXIS eae ge cet eeepc eee eee emo 16 Replacement parts 17 Welcome to Follett Follett equipment enjoys
10. a well deserved reputation for excellent performance long term reliability and outstanding after the sale support To ensure that this product delivers that same degree of service we ask that you take a moment to review this manual before beginning the installation Should you have any questions or require technical help at any point please call our technical service group at 800 523 9361 or 610 252 7301 Before you begin After uncrating and removing all packing material inspect the equipment for concealed shipping damage If damage is found notify the shipper immediately and contact Follett Corporation so that we can help in the filing of a claim if necessary Specifications Series specifications REF4 ADA 31 25 height fits below 34 high ADA compatible counter 4 0 cu ft capacity REF5 34 00 height fits below standard 36 high counter 4 8 cu ft capacity Electrical specifications 115V 60Hz 1 phase Full load amps 8 0 Minimum circuit ampacity 15 amp Maximum size of branch circuit overcurrent device 15 amp Refrigeration specifications Refrigerant R404A Charge size 8 oz Maximum design pressures High side 375psi Low side 174psi Installation specifications Ambient temperature must not exceed 100 F 38 The front louvered panel must be kept free of any cabinet trim or obstructions to ensure proper ventilation of the refrigeration system J Important cautions e Equipment must be wired according
11. ction Refrigerator not plugged in No power to cord Temp controller not energizing components Probe not sensing cut in temperature 1 wo Connect plug Restore power Check controller contact terminals for Replace controller and or probe Turn power switch to ON position check switch and connections power Replace controller if needed Compressor does not run Thermal overload open or defective Capacitor and or relay defective Compressor defective Allow to cool or replace Replace as required Replace compressor Evaporator fan motor does not run Defective fan motor Replace fan motor Refrigerator does not shut off Controller not sensing cut off temperature Controller keeping refrigeration system energized Replace controller and or probe Replace controller Refrigerator does not maintain temperature all components run Condenser or evaporator coil needs cleaning Faulty door gasket Excessively high ambient Refrigerant leak Incorrect refrigerant charge Plugged capillary tube Inefficient compressor Clean coils as needed Replace door gasket Maximum recommended ambient is Locate and repair leak Recover evacuate and weigh in Replace capillary tube 100 degrees F correct charge Consult technical service If problems persist after following this basic
12. e short cycling and failure of the compressor Because there is still refrigerant in the evaporator there can be an additional 1 F 1 5 F of downward drift in temperature after the compressor turns off The temperature may momentarily display as low as 32 F 32 9 F and below rounds down to 32 F before beginning to rise again To display temperature cut out STEP INPUT DISPLAY 1 Press and release SET Current cut out temperature will display for approximately 5 seconds Display will return to current refrigerator temperature To change temperature cut out STEP INPUT DISPLAY 1 Press and hold SET for 3 Current cut out temperature seconds displayed 2 Press UP or DOWN arrows to New cut out temperature desired cut out temperature displayed per above table 3 Press and release SET New cut out temperature blinks three times then current refrigerator temperature will display To change temperature display from F to C STEP INPUT DISPLAY 1 Press and hold SET DOWN HY arrow together for 3 seconds 2 Press UP or DOWN arrow CF until CF is displayed 3 Press and release SET F Press DOWN arrow C Press and release SET C blinks 3 times then HY displayed Press and release SET 0 4 Press UP arrow until 2 2 is New differential 2 2 C displayed displayed 8 Press and release SET 2 2 blinks three times then LS displa
13. ength of probe wire Probe will not measure temperature correctly if wire length is changed Plug power cord into 110 outlet Push center tab of short bottle bracket into top of rear left pilaster Fig 15 Note Use longer bottle bracket for REF5 refrigerators using cut out upper shelf accessory Fill bottle with glycerin or other liquid to increase accuracy of readings by simulating the internal temperature of medications Insert bottle into bottle bracket Route probe through hole in refrigerator back and push probe down through gasketed bottle top Note Alarm probe must be placed in bottle for proper system operation Refer to Fig 16 if attaching alarm to central monitoring or central alarm system A SPDT 1 amp 24V AC resistive relay is provided for this connection 15 Fig 15 Fig 16 GG OO O NIN O Sensor Output Setting alarm temperatures 1 2 3 4 B 6 After the installation is complete allow 30 minutes for the system to stabilize to ambient temperature Calibrate temperature alarm to refrigerator display a Calibration is best done with the alarm probe removed from the probe bottle and placed in the vicinity of the temperature controller probe Allow at least 15 minutes for the probe temperature to stabilize b Note the temperature value displayed on the refrigerator controller and sub
14. lastic drain pan mounted above the condensing unit The heat from the condensing unit evaporates any condensate in the drain pan Temperature control The temperature control system is preset by the factory to maintain a cabinet temperature of 34 F 38 F If desired the cut out temperature can be raised as high as 42 F by following the instructions on page 7 for changing the temperature set point The 4 F cut out differential will be maintained regardless of the controller set point Defrosting REF Series undercounter refrigerators do not require manual defrosting The unit cooler defrosts automatically when the condensing unit is in the OFF cycle Cleaning Interior Using a sponge or soft cloth clean unit with a non abrasive non chlorinated all purpose detergent Use only non chlorine based cleaners Cleaners containing chlorine can cause staining and pitting of the stainless steel Exterior Wipe exterior with a soft cloth in the direction of grain as needed Stainless steel polish may be used to enhance the finish of the unit Annual cleaning Removal of dust and other particulates from air intake areas and the condenser is important for proper operation Some environments with large amounts of dust may require more frequent cleaning Fig 10 1 Disconnect power to unit by turning switch on the lower front panel to the OFF position switching circuit breaker to OFF position and removing power cord from receptacle
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16. oller set point can be changed to deliver the required range in either F or C Refer to page 6 for instructions on changing set point and or display to C Reversing the door swing optional 1 2 On yon Remove screws and latch from refrigerator cabinet Fig 5 1 Use flat screwdriver to carefully remove do not scratch hinge covers Fig 6 1 Support door and remove screws attaching hinge to refrigerator cabinet Fig 6 2 Cover hinge screw holes with screw hole plugs removed from opposite side Reverse door and reinstall hinge screws Reinstall latch on opposite side Remove screws and handle from door Fig 7 1 Rotate handle Fig 7 2 Reinstall handle screws application of 242 blue Loctite to handle screws recommended Loctite is a registered trademark of Henkel Corporation in the United States and other countries Fig 5 Fig 6 Fig 7 Controller operation In normal operation the controller displays cabinet temperatures in F default or user selected C C temperatures are displayed to 1 decimal point An LED located below the snowflake icon flashes when the compressor is running Rocker buttons to the right of the temperature display control all programming functions Fig 8 UP arrow rocker button DOWN arrow rocker button SET rocker button The controlle
17. pressor 00104950 8 Starting capacitor 00104968 Not shown Starting relay 00104976 Not shown Overload protector 00104984 9 Condenser fan motor 00104992 10 Condenser fan blade 00105007 Not shown Fan motor bracket 00157412 11 Condensing unit 00105106 12 Wiring strain relief 00105577 13 Condenser 00105619 Not shown Cap starting capacitor 00105627 14 Shroud condenser 00157347 15 Drain tube evaporator includes clamp 00121681 17 a C3 JB p gt 5 n Hardware Reference Description Part 1 Door REF5 includes gasket 21 3 8 x 21 3 8 00105015 Not shown Door REF4 ADA includes gasket 21 3 8 x 18 5 8 00113910 2 Latch amp striker includes screws 00105023 3 Latch screws each 3 per latch 00103507 4 Striker screws each 2 per striker 502287 5 Hinge each 2 required includes screws 00105031 6 Hinge screws each 6 per hinge 00105080 7 Strip sealer set of 4 REF5 00130138 Not shown Strip sealer set of 4 REF4 ADA 00130146 8 Gasket REF5 21 3 8 x 21 3 8 door 00125732 Not shown Gasket REF4 ADA 21 3 8 x 18 5 8 door 00127738 9 Shelves full each 00103283 Not shown Shelf upper cut out 00127753 10 Pilaster each 00105346 Not shown Thumb screws set of 8 00105353 11 Shelf support snap in each 00156240 12 Lower front panel includes 00114371 and screws 00130120 13 Front panel screws each 6 per panel 00105379 14 Rear panel includes screws 00130161
18. r is pre programmed with a 34 F set point which provides a compressor cut in at 38 F and cut out at 34 F This may not meet your specific application needs For example many pharmaceutical manufacturers recommend that their refrigerated medications be stored between 36 F and 46 F Instructions for changing the set point are found below Refer to the chart below for the set point for your application s required temperature range Set point Cut in Cut in Normal display FI C Cut out F Cut out C range temperature F C 34 1 1 38 34 3 3 1 1 32 38 0 3 3 35 1 7 39 35 3 9 1 7 33 39 6 3 9 36 2 2 40 36 4 4 2 2 34 40 1 1 4 4 37 2 8 41 37 5 2 8 35 41 1 7 5 38 3 3 42 38 5 6 3 3 36 42 2 2 5 6 39 3 9 43 39 6 1 3 9 37 43 2 8 6 1 40 4 4 44 40 6 7 4 4 38 44 3 3 6 7 41 5 45 41 7 2 5 39 45 3 9 7 2 All set points have a 4 F differential HY setting on the controller The 4 F differential means that with a 34 F set point for example the compressor will turn off at 34 F and turn on when it reaches 38 F Caution Do NOT change the differential HY setting except as indicated below in instructions for changing the C or F display Changes to the HY setting can caus
19. release SET 50 blinks three times then CF displayed 13 Wait until current refrigerator CF displayed for 15 seconds temperature is displayed before passing any keys 14 All changes are now in Current refrigerator temperature memory will display in F 15 Press and hold SET for 3 Current cut out temperature seconds displayed 16 Press UP arrow to desired New cut out temperature cut out temperature minimum 34 17 Press and release SET New cut out temperature blinks three times then current refrigerator temperature will display 18 Press and hold SET DOWN HY arrow together for 3 seconds 19 Press UP arrow LS 20 Press and release SET 11 21 Press UP arrow until 34 is New LS temperature 34 F reached displayed 22 Press and release SET 34 blinks 3 times then US displayed 23 Wait until current refrigerator US displayed for 15 seconds temperature is displayed before passing any keys 24 All changes are now in Current refrigerator temperature memory will display in F Conversion complete Controller security The controller panel can be locked to prevent inadvertent or intentional programming changes In locked mode the controller will display cabinet temperature and cut out set point only To lock the controller 1 Press the UP DOWN ARROW in the middle until POF displays 2 Programmer is now locked To unlock the controller 1 Press UP DOWN ARROW in middle until PON displays 2 Programmer is now unlocked
20. to local and NEC codes e Always disconnect power before servicing refrigerator Installation Installing legs required 1 Remove legs from plastic bag packed inside refrigerator 2 Tip refrigerator back and screw legs in all the way to stop they will extend 1 8 below base of REF 3 Adjust legs as needed to level REF in both directions To access legs remove the lower front panel Turn legs clockwise to extend legs Installing shelves required 1 Remove shelves and shelf brackets packed inside refrigerator If ordered find cut out upper shelf accessory in separate box 2 Install shelf brackets in pilasters insert top tab squeeze and push in lower tab 3 If ordered position cut out upper shelf accessory below evaporator with cut out around drain Installing controller faceplate required Fig 3 1 Remove F and C faceplates from plastic bag packed inside refrigerator 2 Snap appropriate faceplate in place over controller face 3 If C display is desired resetting of temperature controller is required See below Changing temperature controller settings optional Fig 4 Follett s temperature controller is pre programmed with a 34 F set point and F display The 34 set point delivers a temperature range of 34 F 38 F that may not meet the needs of your specific application Follett s contr
21. tract the temperature value displayed on the alarm This value is the differential Example Temperature controller 36 F Alarm 38 F Controller Alarm Differential 36 38 2 c Press SET until CAL is displayed Fig 17 1 Press SET again to display CAL value Fig 17 1 Press top or bottom of ADJUST arrow to display the calculated differential 2 F in example above Set high alarm limit a Press SET until HSP is displayed Fig 17 1 b Press SET again to display HSP value Fig 17 1 c Press top or bottom of ADJUST arrow until desired HSP value is displayed Fig 17 2 Set low alarm limit a Press SET until LSP is displayed Fig 17 1 b Press SET again to display LSP value Fig 17 1 Fig 17 Symphony C3 TEMPERATURE ALARM A GD 2 ADT N amp Press arrow up to set EIC c Press top or bottom of ADJUST arrow until desired LSP value is displayed Fig 17 2 Display will return to temperature display in approximately 15 seconds Place alarm probe back in probe bottle Viewing high low log Follett s alarm module allows users to view the highest and lowest temperatures recorded since the last time the RESET button was pressed To view high and low log values 1 2 3 4 5 Press SET button until HI appears Press SET button to view HI log value Press SET button until LOW appears Press SET button to view low log value Press
22. troubleshooting guide call Follett s technical service group at 800 523 9361 or 610 252 7301 14 Accessories Temperature alarm Before installing alarm 1 Fig Remove supplied 9 volt back up battery from packing box Remove 2 screws from module face and remove faceplate Install back up battery on battery connector Locate DIP switches on the back of the faceplate Fig 13 Review the factory DIP switch settings Fig 14 and make any changes required to meet the needs of your specific application Reinstall faceplate 14 Fig 13 Gols E ERE ofS o o o Dip Switch OFF factory default setting ON F No alarm delay 45 minute alarm delay when reset button is pressed 3 off with 4 on 2 Auto reset alarm stops automatically as Manual reset of alarm user must press soon as temperature returns to set range RESET button to stop audible alarm even if temperature has returned to set range 3 amp 4 Audible alarm on no snooze with both off No audible alarm 3 Enables 5 min alarm snooze Enables 45 min alarm snooze when reset button is pressed 3 on with 4 off Installing alarm 1 Mount alarm in desired location with screws supplied by others through back of housing Do not place undue strain on probe cable Note Do not modify l
23. yed 9 Press and release SET 3 4 10 Press DOWN arrow until New LS temperature 1 1 C 1 1 is reached displayed 11 Press and release SET 1 1 blinks three times then US displayed 12 Press and release SET 5 13 Press UP arrow until 10 0 New US temperature 10 C is reached displayed 14 Press and release SET 10 0 blinks three times then CF displayed 15 Wait until current refrigerator CF displayed for approximately temperature is displayed 15 seconds before pressing any keys 16 All changes are now in Current refrigerator temperature memory will display in C 17 If needed adjust cut out temperature as described above To change temperature display from C to F If you have programmed your controller to display in C and want to change it back to display in F follow the steps below STEP INPUT DISPLAY 1 Press and hold SET DOWN HY arrow together for 3 seconds 2 Press UP or DOWN arrow CF until CF is displayed 3 Press and release SET C 4 Press UP arrow F Press and release SET F blinks 3 times then HY displayed 6 Press and release SET 22 7 Press DOWN arrow until 4is New differential 4 F displayed displayed 8 Press and release SET 4 blinks three times then LS displayed 9 Press UP or DOWN arrow US until US displayed 10 Press and release SET 100 11 Press DOWN arrow until New US temperature 50 F 50 is reached displayed 12 Press and
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