Helmer i Series Service And Maintenance Manual
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Helmer i Series Service And Maintenance Manual

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Laboratory
i.Series
iLF120-GX
iLF125-GX
Horizon Series
HLF120-GX
HLF125-GX
Plasma Storage
i.Series
iBF120-GX
iBF125-GX
Horizon Series
HBF120-GX
HBF125-GX
360127-D/E
Freezer Service and Maintenance Manual
®
i.Series
and Horizon Series™
360427/A

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  • Page 1 Freezer Service and Maintenance Manual ® i.Series and Horizon Series™ Laboratory i.Series iLF120-GX iLF125-GX Horizon Series HLF120-GX HLF125-GX Plasma Storage i.Series iBF120-GX iBF125-GX Horizon Series HBF120-GX HBF125-GX 360127-D/E 360427/A...
  • Page 2 The document is furnished for information use only, is subject to change without notice and should not be construed as a commitment by Helmer Scientific. Helmer Scientific assumes no responsibility or liability for any errors or inaccuracies that may appear in the informational content contained in this material.

  • Page 3: Table Of Contents

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Contents About This Manual ................. . . 4 Intended Audience .
  • Page 4 Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Horizon Series Information ..............37 Installation and Configuration .

  • Page 5: About This Manual

    Task Indicates procedures which need to be followed. Note Provides useful information regarding a procedure or operating technique when using Helmer Scientific products. NOTICE Advises the user against initiating an action or creating a situation which could result in damage to equipment;...

  • Page 6: Avoiding Injury

    ♦ Ensure product is stored safely, in accordance with all applicable organizational, regulatory, and legal requirements. ♦ The freezer is not considered to be a storage cabinet for flammable or hazardous materials. REQUIRED: Decontaminate parts prior to sending for service or repair. Contact Helmer or your distributor for decontamination instructions and a Return Authorization Number.

  • Page 7: Product Labels

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Product Labels This information appears on the product specification label, located on the rear of the freezer below the electrical panel. The model also appears on a label located in the chamber on the upper right-side wall. Note Information contained in this specification label varies depending on the model and power requirements. Label Description Model (REF) Serial number Power requirements Sample Product Specification label.

  • Page 8: I.series Information

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ i.Series Information Installation and Configuration Location Requirements Keep all ventilation openings in the enclosure or, in the structure for building-in, clear of obstruction. ♦ Has a grounded outlet meeting the electrical requirements listed on the product specification label. ♦ Is clear of direct sunlight, high temperature sources, heating vents, and air conditioning vents.

  • Page 9: Prepare For Monitoring

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Prepare for Monitoring The back-up battery switch is switched OFF for shipping. Switch the back-up battery switch ON to provide the monitoring system and optional Access Control system with back-up power in the event of AC power failure.
  • Page 10 • For accurate temperature reading, ensure the current time is aligned with the time line groove when the chart knob is fully tightened. • Contact Helmer Customer Service or your distributor to reorder chart paper. Chart recorder stylus and time line groove 1.
  • Page 11 Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ External Monitoring Devices The remote alarm interface is a relay switch with three terminals: ♦ Common (COM) ♦ Normally Open (NO) ♦ Normally Closed (NC) Terminals are dry contacts and do not supply voltage. The interface circuit is either normally open or normally closed, depending on terminals used.

  • Page 12: Configure Storage

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ 2.5 Configure Storage Notes • Before moving storage components, protect stored items in freezer from extended exposure to adverse temperature. • Before moving drawers or shelves, ensure they are completely empty for safe lifting.
  • Page 13 Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Shelves Remove Shelf 1. With one hand, lift the front edge of the shelf from the front brackets. 2. With the other hand, reach under the shelf and bump the rear edge of the shelf upward to disengage rear brackets.

  • Page 14: Controls

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Controls i.Series models are equipped with the i.C monitoring and control system. The i.C system combines temperature control and monitoring into a single user interface. Note Please refer to the i.C User Guide for complete information regarding the i.C...

  • Page 15: Settings

    • Default values for general settings, alarm settings, and display settings are available in the i.C³ User Guide. • Changing temperature settings affects operation of the freezer. Do not change settings unless instructed in product documentation or by Helmer Technical Service. The i.C³ temperature monitor and controller is programmed at the factory. To change a setting, first enter the Settings screen, then select the setting. The method for accessing the Settings mode for each setting varies.
  • Page 16 The compressor will run as a percent of maximum if both the monitor and control probe fail. NOTICE Upper Rail, Lower Rail, Delay on Start-up and Speed During Probe Error are factory-preset and should not be changed unless directed by Helmer Technical Service. 360427/A...
  • Page 17 Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Defrost Time Notes • Depending on the high temperature alarm setpoint and the actual temperature increase during the defrost cycle, frequent door openings may trigger repeated high temperature alarms.
  • Page 18 • The database is archived and a new database is automatically created • Unit will continue to run with previously saved settings Inverter Communication Failure • Triggered if there is a problem with the refrigeration system Contact Helmer Technical Service for more information 360427/A...

  • Page 19: Sensor Calibration

    • Offset values are adjusted to the tenth of a degree (0.1). • After one hour of no interaction, the Home screen or Temperature Graph screensaver (if enabled) is displayed. • The Compressor Probe offset and Evaporator Defrost Probe offset are factory-preset and should not be changed unless directed by Helmer Technical Service. View Sensor Calibration Values 1. Touch the Settings icon. 2. Enter the Settings password.
  • Page 20 Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Primary Monitor Probe Verify the primary monitor probe is reading the chamber temperature correctly by comparing the probe reading to the temperature measured by a calibrated reference thermometer. If the probe is not reading correctly, change the value displayed on the monitor.
  • Page 21 Compressor Probe The compressor temperature probe has been factory-calibrated. Changing the calibration setting is not typically necessary and should not be performed unless directed by Helmer Technical Service. Factory Default Settings Settings listed below may be simultaneously returned to factory default values.
  • Page 22 Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Setting Restored Value Chamber Setpoint -30 °C -35 °C* Upper Rail 0.7 °C Lower Rail -0.7 °C Delay on Start-Up 2 minutes Speed During Probe Error * Factory default setpoints for plasma freezers for locations outside the U.S. and Canada.

  • Page 23: Maintenance

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Maintenance Maintenance tasks should be completed according to the schedule below. Refer to the i.C³ User Guide for more detail on completing various tasks. Notes • The preventive maintenance schedule provides recommended minimum requirements. Regulations or physical conditions at your organization may require maintenance items be performed more frequently, or only by designated service personnel.

  • Page 24: Alarm Tests

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Alarm Tests Test alarms to ensure they are working correctly. The freezer has alarms for chamber temperature, compressor temperature, power failure, probe failure, and door open (time).
  • Page 25 Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Manual Chamber Alarm Test NOTICE • Perform the low alarm test before the high alarm test to control the temperature more closely and complete the testing more quickly.

  • Page 26: Test And Replace Back-Up Batteries

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Test and Replace Back-up Batteries Monitoring System Back-up Battery On all i.C³ screens, the Battery icon will appear in the header bar when the system is running on battery power and the screen brightness will automatically be reduced.

  • Page 27: Check Probe Bottle(S)

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Check Probe Bottle(s) Remove the probe bottle(s) from the bracket(s) and inspect for cracks. Replace the bottle(s) if necessary. Ensure the probe bottle has approximately 4 oz. (120 mL) of product simulation solution (1:1 ratio of water to propylene glycol).
  • Page 28 Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Condenser Grill Disconnect the freezer from AC power when cleaning. NOTICE Some equipment surfaces may be sharp. Take care when cleaning to avoid injury. If the freezer is located in an environment where it is exposed to excessive lint or dust, the condenser grill may require cleaning more frequently than stated in the preventive maintenance schedule.

  • Page 29: Service

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Service Refrigerant Risk of fire or explosion. Flammable refrigerant used. To be repaired only by trained service personnel. DO NOT puncture refrigerant tubing. NOTICE • Review all safety instructions prior to recharging refrigerant. • Maintenance should only be performed by trained refrigeration technicians familiar with hydrocarbon refrigerants.
  • Page 30 Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Label Description Unit cooler cover Drain port Unit cooler cover and drain port Remove Unit Cooler Cover 1. Switch the AC power switch OFF. Switch the back-up battery switch OFF.

  • Page 31: Troubleshooting

    Power cord is loose. Check both ends of the power cord at the wall outlet and the freezer. GFI/GFCI Outlet has tripped. Move to standard outlet. Helmer does not recommend operating this unit on a GFI outlet. Door alarm Door is open.

  • Page 32: Chamber Temperature Problems

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Chamber Temperature Problems Problem Possible Cause Action Temperature display Display temperature needs to be Follow temperature calibration process. does not match actual calibrated. temperature. Probe bottle is empty, or probe is Check level of solution in bottle(s) and or insert probe into bottle.

  • Page 33: I.series Parts

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ i.Series Parts Notes • Before replacing parts, protect items in freezer from extended exposure to adverse temperature. • Allow freezer temperature to stabilize at setpoint after replacing parts or after extended door opening.
  • Page 34 Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Letter Description Part Number Volts Letter Description Part Number Volts Door switch 120380 Not Shown Lower hinge bearing 220375 Mullion heater 800883-1 Door stop 320763-1 (behind strike plates)
  • Page 35 Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Risk of fire or explosion. Flammable refrigerant used. To be repaired only by trained service personnel. DO NOT puncture refrigerant tubing. NOTICE Disconnect unit from AC power before accessing the electrical compartment. Note Circuit boards are sensitive to static electricity and can be damaged by electrostatic discharge. User proper ESD precautions when handling board.

  • Page 36: Schematics

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Schematics iBF and iLF Models 360427/A...
  • Page 37 Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ 360427/A...

  • Page 38: Horizon Series Information

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Horizon Series Information Installation and Configuration Location Requirements Keep all ventilation openings in the enclosure or, in the structure for building-in, clear of obstruction. ♦ Has a grounded outlet meeting the electrical requirements listed on the product specification label. ♦ Is clear of direct sunlight, high temperature sources, heating vents, and air conditioning vents.

  • Page 39: Defrost Events

    • Defrost events must be at least one hour apart. • Contact Helmer Technical support for more information regarding changing defrost frequency or duration. Some surfaces on the back of the freezer may be hot. Take care when accessing the back of the unit.

  • Page 40: Prepare For Monitoring

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Prepare for Monitoring The monitoring system back-up battery is installed on the unit but not connected. Connect the battery and switch the audible alarm key switch to ON to provide monitoring system with back-up power and alarm capability in the event of AC power failure. If included, switch the Access Control back-up battery ON to provide the optional Access Control system with back-up power in the event of an AC power failure.
  • Page 41 • For accurate temperature reading, ensure the current time is aligned with the time line groove when the chart knob is fully tightened. • Contact Helmer Technical Service or your distributor to reorder chart paper. Chart recorder stylus and time line groove 1.

  • Page 42: Configure Storage

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ External Monitoring Devices The remote alarm interface is a relay switch with three terminals: ♦ Common (COM) ♦ Normally Open (NO) ♦ Normally Closed (NC) Terminals are dry contacts and do not supply voltage. Interface circuit is either normally open or normally closed, depending on terminals used.
  • Page 43 Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Drawers Remove Drawer 1. Pull the drawer out until it stops. 2. Lift the front of the drawer off the front rollers on the slide. 3. With the front of the drawer slightly lifted, pull the drawer all the way forward. The rear drawer rollers should be touching the front slide rollers.

  • Page 44: Controls

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Controls Horizon Series models are equipped with a monitor and optional control system which allows users to view and change current settings. 10.1 Monitor and Control Interface...
  • Page 45 Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Display Minimum and Maximum Monitor Temperature Recordings The minimum and maximum recording feature allows the user to view a minimum temperature occurrence and a maximum temperature occurrence within a given period of time. The timer provides a time reference in which those temperatures occurred.

  • Page 46: Alarm Reference

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ 10.2 Alarm Reference If an alarm condition is met, an alarm activates. Some alarms are visual only; others are visual and audible. Some alarms are sent through the remote alarm interface.

  • Page 47: Settings

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ 10.3 Settings Temperature Setpoint The factory default temperature setpoint for the freezer is -30.0 °C. For locations outside the U.S. and Canada, the factory default temperature setpoint for plasma freezers is -35.0 °C. This can be changed if your organization requires a chamber temperature other than the default setting.
  • Page 48 Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Alarm Settings The high and low temperature alarm settings may be changed by the operator. Temperature alarm setpoints specify the temperature at which an alarm activates. The setpoint for temperature alarms may be changed.
  • Page 49 Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Control Sensor The temperature controller senses unit cooler temperature through the control probe in the unit cooler. The unit cooler temperature typically varies from the chamber temperature, so an offset value is used by the control system to compensate for the difference. The temperature controller adjusts chamber temperature around the freezer setpoint.

  • Page 50: Maintenance

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Maintenance Maintenance tasks should be completed according to the schedule below. Notes • The preventive maintenance schedule provides recommended minimum requirements. Regulations or physical conditions at your organization may require maintenance items be performed more frequently, or only by designated service personnel.

  • Page 51: Alarm Tests

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ 11.1 Alarm Tests Test alarms to ensure they are working correctly. The freezer has alarms for chamber temperature, power failure, and door open (time). Chamber Temperature Alarm Test NOTICE •...

  • Page 52: Test And Replace Back-Up Batteries

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ 11.2 Test and Replace Back-up Batteries Check Monitoring System Battery The monitoring system does not indicate the charge level of the battery. Regularly test the battery and replace the battery if the test fails or if the battery has been in use for one year.

  • Page 53: Check Probe Bottle

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ 11.3 Check Probe Bottle Remove the probe bottle from the bracket and inspect for cracks. Replace the bottle if necessary. Ensure the probe bottle has approximately 4 oz (120 mL) of product simulation solution (1:1 ratio of water to propylene glycol).

  • Page 54: Service

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Service 12.1 Refrigerant Risk of fire or explosion. Flammable refrigerant used. To be repaired only by trained service personnel. DO NOT puncture refrigerant tubing. NOTICE • Review all safety instructions prior to recharging refrigerant. • Maintenance should only be performed by trained refrigeration technicians familiar with hydrocarbon refrigerants.
  • Page 55 Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Label Description Unit cooler cover Drain port Unit cooler cover and drain port Remove Unit Cooler Cover 1. Switch the AC power switch OFF. Switch the back-up battery switch OFF.

  • Page 56: Troubleshooting

    Power cord is loose. Check both ends of the power cord at the wall outlet and the freezer. GFI/GFCI Outlet has Move to standard outlet. Helmer does not recommend operating this unit on tripped. a GFI outlet. Inverter Error Power was lost to the freezer.

  • Page 57: Chamber Temperature Problems

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ 13.3 Chamber Temperature Problems Problem Possible Cause Action Temperature display Display temperature needs to be Follow temperature calibration process. does not match actual calibrated. temperature. Probe bottle is empty, or probe is Check level of solution in bottle and or insert probe into bottle.

  • Page 58: Horizon Series Parts

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Horizon Series Parts Notes • Before replacing parts, protect items in freezer from extended exposure to adverse temperature. • Allow freezer temperature to stabilize at setpoint after replacing parts or after extended door opening.
  • Page 59 Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Letter Description Part Number Volts Letter Description Part Number Volts Door switch 120380 Lower hinge bracket assembly 401825-1-067* * right assembly; ** left assembly Mullion heater 800883-1...
  • Page 60 Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ DANGER Risk of fire or explosion. Flammable refrigerant used. To be repaired only by trained service personnel. DO NOT puncture refrigerant tubing. • Disconnect unit from AC power before accessing the electrical compartment. Note Circuit boards are sensitive to static electricity and can be damaged by electrostatic discharge. Use proper ESD precautions when handling the board.

  • Page 61: Hbf And Hlf Models

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ Schematics 15.1 HBF and HLF Models 360427/A...

  • Page 62: Hbf And Hlf Models (Without Access Control)

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ 15.2 HBF and HLF Models (without Access Control) 360427/A...

  • Page 63: Hbf And Hlf Models (With Access Control)

    Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ 15.3 HBF and HLF Models (with Access Control) 360427/A...

  • Page 64: Appendix A: Warranty

    ♦ i.Series model compressor warranty period is five (5) years. ♦ Horizon Series model compressor warranty period is three (3) years. Parts For a period of two (2) years, Helmer will supply at no charge, including freight, any part that fails due to defects in material or workmanship under normal use, with the exception of expendable items. Expendable items such as glass, filters, light bulbs, and door gaskets are excluded from this warranty coverage. Inspection of defective parts by Helmer will be final in determining warranty status.
  • Page 65 Helmer Scientific i.Series and Horizon Series Freezer Service and Maintenance Manual ® ™ 360427/A...
  • Page 66 Helmer Scientific 14400 Bergen Boulevard, Noblesville, IN 46060 USA 360427/A Copyright © 2021 Helmer, Inc.

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