Thermo Forma 916 Operating And Maintenance Manual Download Page 1

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Model:

916/917

Ultra Low Temperature

Upright Freezer

17 cu. ft. capacity

Operating and Maintenance Manual

Manual No. 7050916 Rev. 7

Summary of Contents for 916

Page 1: ...Model 916 917 Ultra Low Temperature Upright Freezer 17 cu ft capacity Operating and Maintenance Manual Manual No 7050916 Rev 7 ...

Page 2: ... performed by qualified service personnel MANUAL NO 7050916 20775 SI 8506 6 3 02 Updated to 40 C Pepi thermostat from 43 C Klixon ccs 7 20762 FR 1606 5 20 02 Added Normally Open description to expansion tank solenoid valve ccs 20845 FR 1606 5 22 02 Updated refrigerant charge on schematics oil return issue ccs 20684 FR 1596 3 28 02 Added sample pull down curve after specs ccs 6 20644 FR 1557 3 8 02...

Page 3: ...ii Model 916 917_________________________________________________________________________________Service ...

Page 4: ... con este simbulo Equipment being maintained or serviced must be turned off and locked off to prevent possible injury Risques potentiels liés à l énergie L équipement en entretien ou en maintenance doit être éteint et mis sous clé pour éviter des blessures possibles Geräte an denen Wartungs oder Servicearbeiten durchgeführt werden müssen abgeschaltet und abgeschlossen wer den um Verletzungen zu ve...

Page 5: ...2 Operation 2 1 2 1 Changing the Control Temperature Set Point 2 1 2 2 Changing the Over Temperature Alarm Set Point 2 1 2 3 Alarms 2 2 2 4 Silencing the Over Temperature Alarm 2 2 Section 3 Calibration 3 1 3 1 Temperature Display Calibration 3 1 3 2 Recorder Calibration 3 1 a Changing the recorder range 3 1 b Calibrating the chart recorder 3 1 Section 4 Routine Maintenance 4 1 4 1 Cleaning the Ca...

Page 6: ...tion set the front caster brakes If tipped more than 45 allow the unit to set upright for 24 hours before start up The freezer must not be moved with the prod uct load inside 1 2 Getting to Know Your Freezer Figure 1 1 Control Panel ALED display Shows actual chamber temperature and indi cates the control temperature set point when the Press To Set button is pressed BCondenser Hot indicator Lights ...

Page 7: ...__________________________________________Installation 1 2 Figure 1 2 Freezer Exterior front view Figure 1 3 Freezer Base rear view Figure 1 4 Vacuum Relief Port and Chamber Probe Figure 1 5 Vacuum Relief Port and Chamber Probe Assembly without cover ...

Page 8: ...re 1 3 for the locations of the pre tapped holes 1 5 Installing the Shelves Install the shelf clips into the shelf pilasters front and back at the desired shelf level Install the shelves in the cabinet onto the clips 1 6 Location Locate the freezer on a firm level surface in an area with an ambient temperature between 18 C and 32 C Provide ample room to reach the mains disconnect switch power swit...

Page 9: ...upply Connections Inlet compression Outlet compression Maximum water pressure 150 PSIG Water usage City water 65 F 18 C 1 GPM 3 4 liters HP Tower water 85 F 29 C 3GPM 11 4 liters HP Water Strainer P N 780268 Included in the parts bag within the freezer is a water strainer recommended to be installed in the water inlet line The connection size is FPT 1 13 Electrical Requirement and Connection The f...

Page 10: ...it to operate at the desired alarm point see Section 2 1 and allow the unit to operate until it reaches the set point 2 Remove the top two screws securing the control panel and loosen the bottom two screws Carefully remove the control panel 3 Remove the six screws securing the cover of the box attached to the inside of the control panel to expose the alarm board 4 Turn the switch on the control pa...

Page 11: ...y for battery replacement instructions needs replaced See spare parts list for battery part number Voltage Compensation On green Incoming voltage too high Check if line voltage is or too low within operating range See 6 Electrical If within specification no action required 2 4 Silencing the Over Temperature Alarm Move the switch from the NORMAL position to the STAND BY position When the alarm cond...

Page 12: ... To change the program setting press the left or right arrows to increase or decrease the count 5 When the desired program number is flashing press button 3 to bring the pen arm back onto the chart Recording will begin in the new program NOTE Changing ranges may require an offset calibration as outlined in Section 3 2 b Program No Range Program 1 40 C to 30 C Program 2 0 C to 60 C Program 3 100 C ...

Page 13: ...he instruction manual for further details Thermo Forma has qualified service technicians using NIST traceable instruments available in many areas For more information on Preventive Maintenance or Extended Warranties please contact us at the number below Cleaning and calibration adjustment intervals are dependent upon use environmental conditions and accuracy required Tips Fill an upright by starti...

Page 14: ...probe location 4 5 Check and clean probe and cover gaskets hinges and doors of ice and snow More frequent cleaning may be required depending on use and environmental conditions 4 2 Check air filter Clean or replace as needed 1 7 Check alarm back up battery Replace Check condenser fan motor for unusual motor noise or vibration Verify and document calibration at the minimum annually 4 3 Clean conden...

Page 15: ...the unit 3 Rinse with fresh water and drain the unit again 4 Fill with fresh water 5 Add cleaning agent solution and concentration dependent on deposits or build up 6 Circulate cleaning solution if feasible 7 Drain the cleaning solution 8 Add and circulate a passivating liquid for corrosion inhibi tion of plate surfaces 9 Drain this liquid 10 Rinse with fresh water and drain 11 Reconnect the water...

Page 16: ...n 4 4 Disconnect the battery This will prepare the unit for storage Section 5 Service 5 1 Servicing the Refrigeration System Before opening the refrigeration system use the trou bleshooting chart to check out the electrical system Electrical schematics and refrigeration drawings with parts are included with this manual Refer to the troubleshooting chart on the following page For a consistent and d...

Page 17: ...t Point Too much warm product added Door open too long Inadequate air circulation Calibration Dirty condenser High ambient temperature Too Much Frost Build Up Door not properly sealed Freezer not Being Refrigerated unit is receiving power Compressor thermal overload open Loss of refrigerant in either system Defective compressor s Defective temp control Defective high pressure cut off Display Probl...

Page 18: ...ty 17 cu ft 489 9 liters Refrigeration Cascade system 2 hermetically sealed compressors Insulation Non CFC foamed in place urethane 5 0 12 7cm cabinet 4 5 11 4cm door Electrical 916 120VAC 1 PH 60 Hz 16 FLA Operating Range 108VAC 130VAC 917 230VAC 1 PH 50 60 Hz 12 0 FLA Operating Range 208VAC 240VAC Breaker 916 20 Amp 120V Requirements 917 15 Amp 230V Automatic Voltage Low Cut In 110V Cut Out 115V...

Page 19: ...ermo Forma Representative Pulldown and Cycling Curve 95 90 85 80 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 0 5 10 15 20 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 270 Time 5 minute intervals Temperature C for 17 Ft 86 C Freezers 3 17ft3 86 xls 2 02 Sample Chart ...

Page 20: ...7 1 Model 916 917_____________________________________________________________________________Parts List ...

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Page 22: ...7 3 Model 916 917____________________________________________________________________________Parts List ...

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Page 27: ...8 1 Model 916 917___________________________________________________________________Refrigeration Schematics ...

Page 28: ...8 2 Model 916 917___________________________________________________________________Refrigeration Schematics ...

Page 29: ...8 3 Model 916 917___________________________________________________________________Refrigeration Schematics ...

Page 30: ...Model 916 917___________________________________________________________________Electrical Schematics 9 1 ...

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Page 32: ...Model 916 917___________________________________________________________________Electrical Schematics 9 3 ...

Page 33: ...Model 916 917__________________________________________________________________Electrical Schematics 9 4 ...

Page 34: ...Model 916 917__________________________________________________________________Electrical Schematics 9 5 ...

Page 35: ...Model 916 917__________________________________________________________________Electrical Schematics 9 6 ...

Page 36: ... design carries a unit production lifetime warranty Please contact your sales representative or Thermo Forma for additional information Replacement or repair of component parts or equipment under this warranty shall not extend the warranty to either the equipment or to the component part beyond the original one year warranty period The Thermo Forma Service Department must give prior approval for t...

Page 37: ...is warranty In addition to the standard warranty effective March 1 2000 the foamed in place cabinet design carries a unit production lifetime warranty Please contact your sales representative or Thermo Forma for additional information Replacement or repair of component parts or equipment under this warranty shall not extend the warranty to either the equipment or to the component part beyond the o...

Page 38: ...Model 916 917_________________________________________________________________________Declaration of Conformity 10 3 ...

Page 39: ...Millcreek Road P O Box 649 Marietta Ohio 45750 U S A Telephone 740 373 4763 Telefax 740 373 4189 ...

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Thermo Forma 916, Operating And Maintenance Manual

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