Helmer Scientific i Series Service Manual
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Helmer Scientific i Series Service Manual

Refrigerator
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Refrigerator Service Manual
i.Series
and Horizon Series™
®
Model Group
Blood Bank
Laboratory
Pharmacy
HELMER SCIENTIFIC
14400 Bergen Boulevard
Noblesville, IN 46060 USA
PH +1.317.773.9073
FAX +1.317.773.9082
USA and Canada 800.743.5637
360127-D/D
i.Series
iB111 (Version D)
iB120, iB125, iB245, iB256 (Version D)
iLR111 (Version D)
iLR120, iLR125, iLR245, iLR256 (Version D)
iPR111 (Version D)
iPR120, iPR125, iPR245, iPR256 (Version D)
Horizon Series
HB111 (Version D)
HB120, HB125, HB245, HB256 (Version D)
HLR111 (Version D)
HLR120, HLR125, HLR245, HLR256 (Version D)
HPR111 (Version D)
HPR120, HPR125, HPR245, HPR256 (Version D)
0086
ISO 13485:2003 CERTIFIED

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Summary of Contents for Helmer Scientific i Series

  • Page 1 HLR120, HLR125, HLR245, HLR256 (Version D) Pharmacy iPR111 (Version D) HPR111 (Version D) iPR120, iPR125, iPR245, iPR256 (Version D) HPR120, HPR125, HPR245, HPR256 (Version D) HELMER SCIENTIFIC 14400 Bergen Boulevard Noblesville, IN 46060 USA PH +1.317.773.9073 0086 FAX +1.317.773.9082 USA and Canada 800.743.5637...
  • Page 2 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. For the purpose of clarity, Helmer Scientific considers only the most recent revision of this document to be valid.

  • Page 3: Table Of Contents

    Contents Section I: General Information ........6 1 About this Manual .
  • Page 4 7 Settings ..............17 Home Screen .
  • Page 5 10.3.1 Electrical Box ..............44 10.4 Interior .
  • Page 6 15 Troubleshooting ............66 15.1 General Operation Problems.

  • Page 7: Section I: General Information

    1.4 Confidential / Proprietary Notices Use of any portion(s) of this document to copy, translate, disassemble or decompile, or create or attempt to create by reverse engineering or otherwise the information from Helmer Scientific products is expressly prohibited. Disclaimer This manual is intended as a guide to provide the operator with necessary instructions on the proper use and maintenance of certain Helmer Scientific products.

  • Page 8: Safety

    General Information Safety Includes general safety information for refrigerator operation. Labels Caution: Risk of damage Caution: Unlock all casters to equipment or danger to operator Caution: Hot surface Earth / ground terminal Caution: Shock/electrical Protective earth / ground hazard terminal Avoiding Injury ► Review safety instructions before installing, using, or maintaining the equipment.

  • Page 9: Configuration

    General Information Configuration Model and Input Power NOTE Service information varies depending on the model and power requirements. This information appears on the product specification label, located on the rear of the refrigerator below the electrical box. The model also appears on a label located in the chamber on the upper side of the right wall.

  • Page 10: Horizon Series Control System

    General Information 3.2.2 Horizon Series Control System Horizon Series refrigerators feature the Horizon combined monitor and temperature controller. The Horizon Series system controls chamber temperature and monitors and displays operational information. Temperature Probes Number and location of probes varies by model. External probes may be introduced through existing top ports and immersed in existing probe bottles, or through side access port (availability varies by model).

  • Page 11: Chart Recorder

    General Information Chart Recorder If installed, refer to the Temperature Chart Recorder Operation and Service Manual on CD. The chart recorder has a battery system, enabling a period of continuous operation if power is lost. Battery life varies by manufacturer as well as voltage level remaining. Providing full power is available, backup power for the temperature chart recorder is available for up to 14 hours.

  • Page 12: References And Compliance

    General Information References and Compliance 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. The table indicates if an alarm is audible (A), visual (V), or sent through the remote alarm interface (R). Alarm Alarm Type High Temperature...

  • Page 13: Warranty

    General Information Warranty Rel.i™ Product Warranty USA and Canada For technical service needs, please contact Helmer at 800-743-5637 or www.helmerinc.com. Have the model and serial number available when calling. 5.1.1 Rapid Resolution When a warranty issue arises it is our desire to respond quickly and appropriately. The service department at Helmer is there for you.

  • Page 14: Outside Of Usa And Canada

    General Information SERVICES IS LIMITED TO AN AMOUNT NOT TO EXCEED THE PRICE OF THE PARTICULAR GOODS OR SERVICES GIVING RISE TO THE LIABILITY. IN NO EVENT SHALL HELMER BE LIABLE FOR ANY INDIRECT, INCIDENTAL, CONSEQUENTIAL, OR SPECIAL DAMAGES, INCLUDING WITHOUT LIMITATION DAMAGES RELATED TO LOST REVENUES OR PROFITS, OR LOSS OF PRODUCTS.

  • Page 15: Section Ii: I.series ® Models

    i.Series® Models Section II: i.Series Models ® Product Configuration Install Battery for Backup Power The monitoring system and chart recorder each have a battery system, enabling a period of continuous operation if power is lost. NOTE ► The optional Access Control system uses the monitoring system battery for backup power, in the event of a power failure.

  • Page 16: External Monitoring Devices

    i.Series® Models 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 17: Drawer Labels

    i.Series® Models CAUTION ► Before moving drawers, ensure they are completely empty for safe lifting. ► Maximum basket, drawer, or shelf load is 100 lbs (46 kg). NOTE Before moving storage components, protect stored items in refrigerator from extended exposure to adverse temperature. Remove a drawer or basket Pull drawer or basket out until it stops.

  • Page 18: Level The Refrigerator

    i.Series® Models Remove shelf brackets Using a screwdriver, remove front bracket retainers. Tap front brackets upward to disengage standards. Remove front brackets from standards. Install shelf brackets Insert front brackets into standard at appropriate height. Tap front brackets downward to engage standards. Using a screwdriver, install front bracket retainers.

  • Page 19: Home Screen

    i.Series® Models Home Screen The Home screen appears when: ► The Home button is touched from any other screen ► There is no interaction for two minutes on any screen other than those used to enter a password 7.1.1 Home Screen Functions NOTE Refer to the i.C³...

  • Page 20: Refrigerator Temperature Setpoint

    i.Series® Models Setting Initial Factory Value Refrigerator Setpoint 4.0 °C Hysteresis Setpoint 2.0 °C (iB111) 0.8 °C (iLR111 and iPR111) 1.0 °C (iLR120, iLR125, iPR120, iPR125) 1.5 °C (245, 256) Delay on Start-Up 2 minutes Duty Cycle of Control Relay during Probe Failure 7.2.1 Refrigerator Temperature Setpoint Change the setpoint if:...

  • Page 21: Control Relay Probe Error Duty Cycle

    i.Series® Models 7.2.4 Control Relay Probe Error Duty Cycle NOTE Default Duty Cycle of Control Relay During Probe Error is 50%. Touch i.C³ APPS, i.C³ Settings. Enter the Settings password. Touch Temperature Setpoints. Touch + or – on the Duty Cycle of Control Relay during Probe Failure spin box. ► The duty cycle is the percentage of time the compressor will run in the event of a temperature control probe failure.

  • Page 22: Control Sensor Offset

    i.Series® Models Obtain: ► Calibrated reference thermometer, independent and traceable per national standards. ► Tape or wire ties to attach thermometer to monitor probe. Calibrate upper monitor probe: Remove upper monitor probe from the probe bottle. Unscrew the cap from the bottle. Attach the thermometer to the monitor probe, and place them in the bottle.

  • Page 23: Calibrate Compressor And Evaporator Probe

    i.Series® Models Determine control sensor offset: NOTICE ► Control Sensor Offset is factory-preset and should not be changed. Contact Helmer Technical Service for instructions regarding changing the Control Sensor Offset. ► Upper monitor temperature must be verified and accurate prior to adjusting the Control Sensor Offset.
  • Page 24 i.Series® Models Setting Restored Value Home Screen Application Icons i.C³ APPS, Temperature Alarm Test, Temperature Graph, Information Logs, Download Display Brightness High (3 symbols) Password (for Settings screen) 1234 Sounds Alarm Volume Alarm Tone Temperature Calibration Values Not affected by restoring factory settings Unit ID Serial number entered at factory Date Format...

  • Page 25: Additional Factory Default Settings For Laboratory And Pharmacy Models

    i.Series® Models 7.3.5 Additional Factory Default Settings for Laboratory and Pharmacy Models Setting Restored Value Control Relay Probe Failure Duty Cycle Defrost Event #1 On/Off On (except 111 models) Defrost Event #1 Start Time 12:00 AM Defrost Event #2 On/Off Defrost Event #2 Start Time 8:00 AM Defrost Event #3 On/Off...

  • Page 26: Change Factory Settings

    i.Series® Models 7.3.7 Change Factory Settings Several of the refrigerator operating parameters are configured at the factory. The settings listed below are set at the factory, and may be changed at the direction of Helmer Technical Service. Setting Description Lower Probe Toggle the lower monitor probe on or off Lower Probe Alarm Toggle the lower monitor probe alarm on or off...

  • Page 27: Manual Chamber Alarm Test

    i.Series® Models Test the high alarm: Identify current setting for high alarm setpoint. Touch Home, i.C³ APPS, Temperature Alarm Test. Touch High Alarm Test. “Peltier Test Probe Warming” message appears. When displayed temperature reaches the alarm setpoint, the temperature reading turns red. When completed, “Test Complete”...

  • Page 28: Power Failure Alarm Test

    i.Series® Models 7.4.3 Power Failure Alarm Test NOTE During a power failure, the power failure alarm sounds and the battery provides power to the monitoring system and optional Access Control lock. Change Power Failure delay setting to 0 minutes. Touch Home, Settings, Alarm Settings. Touch + or –...

  • Page 29: Maintenance

    i.Series® Models Maintenance NOTE ► Refer to the operation manual for the preventive maintenance schedule. ► Before performing maintenance, protect items in refrigerator from extended exposure to adverse temperature. ► Allow refrigerator temperature to stabilize at setpoint after performing service or after extended door opening.

  • Page 30: Check Monitoring System Battery

    i.Series® Models Check Monitoring System 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. The monitoring system will automatically disable some features to extend battery life.

  • Page 31: Exterior

    i.Series® Models 8.5.2 Exterior Clean glass surfaces with soft cotton cloth and glass cleaner. Clean exterior surfaces with soft cotton cloth and non-abrasive liquid cleaner. CAUTION The condensate evaporator and water evaporation tray are hot. 8.5.3 Interior Clean painted surfaces with mild detergent. Clean stainless steel surfaces with a general-purpose laboratory cleaner suitable for stainless steel.

  • Page 32: Unit Cooler Cover Removal And Installation

    i.Series® Models Unit Cooler Cover Removal and Installation If unit cooler cover is not removed as detailed in this procedure the drain port may be damaged. Improper drainage may result in excessive icing and refrigerator’s inability to maintain temperature. Required tools: ► 5/16”...
  • Page 33 i.Series® Models Attach unit cooler cover. Lift unit cooler cover into place. Front edge of the cover should be behind the unit cooler case. Use the socket wrench to install four screws to secure the unit cooler cover. Insert the drain hose through hole in the refrigerator. Push drain hose upward, toward the unit cooler drain port.

  • Page 34: Troubleshooting

    i.Series® Models Troubleshooting CAUTION Review all safety instructions prior to troubleshooting. Refer to Section I, Item 2 (Safety). General Operation Problems Problem Possible Cause Action A drawer or basket Drawer slide is faulty. ► Confirm the slide is operating correctly. Replace if does not slide easily.

  • Page 35: Chamber Temperature Problems

    i.Series® Models Chamber Temperature Problems Problem Possible Cause Action The chamber Monitor probe(s) is not ► Check the chamber temperature calibration. temperature displayed calibrated. Change the calibration if necessary. is higher or lower ► Test the probe connections. Secure the Connections for the than the actual monitor probe are...

  • Page 36: Alarm Activation Problems

    i.Series® Models Problem Possible Cause Action The compressor runs Refrigerator setpoint ► Confirm the setpoint is set within the operating continuously. is set too low. range and change it if necessary. Control probe is out of ► Confirm the probe is providing accurate calibration.
  • Page 37 i.Series® Models Problem Possible Cause Action The High Temperature Connections for the ► Check the probe connections. Secure the alarm activates when monitor probe are connections if necessary. the door is opened, loose. then clears shortly Monitor probe is faulty. ► Test the probe. Replace the probe if necessary. after the door is Unit cooler fan ► Test the door switch and unit cooler fan...
  • Page 38 i.Series® Models Problem Possible Cause Action The Door Open Doors are not closing ► Confirm the hinge cams are not damaged. alarm is activating completely. Replace the cams if necessary. sporadically. Doors are closing but ► Confirm the door gasket seals completely. not sealing completely.

  • Page 39: Testing Problems

    i.Series® Models Problem Possible Cause Action An alarm is activated Temperature monitor ► Confirm the upper monitor probe is reading but the temperature is not calibrated. correctly. Calibrate the probe if necessary. recorded at activation Temperature changed ► No action necessary. does not match the slightly around the alarm setpoint.
  • Page 40 i.Series® Models Problem Possible Cause Action There is excessive Humid air is entering ► Confirm the refrigerator is level, and the doors water in the chamber. the chamber. are aligned, closing tightly, and sealing correctly. Correct issues as necessary. Connection between ► Confirm the connection is secure.

  • Page 41: Parts

    i.Series® Models Parts NOTE ► Before replacing parts, protect items in refrigerator from extended exposure to adverse temperature. ► Allow refrigerator temperature to stabilize at setpoint after replacing parts or after extended door opening. 10.1 Front Left: iB120 refrigerator. Center: iB111 refrigerator. Top-right: Chart recorder and door (except 111 model).

  • Page 42: Access Control Option

    i.Series® Models Schematic Label Description Part Number Label Chart recorder battery 120218 Caster (swivel with brake) 220467 10.1.1 Access Control Option Access Control features (iB125 model shown). Schematic Label Description Part Number Label Magnetic lock 800138-1 Backup battery key switch 401220-1 10.1.2 Control System and Display Left: Front view, LCD touchscreen.

  • Page 43: Top

    i.Series® Models NOTE ► The i.C³ display assembly is sensitive to static electricity and can be damaged by electrostatic discharge. Use proper ESD precautions when handling the display assembly. ► Although the touchscreen and display board may be replaced independently of the i.C³...

  • Page 44: Rear

    i.Series® Models 10.3 Rear Rear features (iB111 model shown). Schematic Label Description Part Number Label Electrical box Refer to subsequent section(s) for part numbers. Power cable North American models 120 V: 120630 230 V: 120631 European models 230 V: 120156 115 V Condensate evaporator assembly (includes condensate evaporator, tray, and 111 model: 400791-1...

  • Page 45: Electrical Box

    i.Series® Models 10.3.1 Electrical Box Electrical box features (iPR125 model shown). CAUTION Disconnect the refrigerator from AC power before opening the electrical box. Schematic Label Description Part Number Label Power supply board 800035-1 Compressor relay 120426 Power line filter 120400 i.C³ control board 8000034-1 Lighting power supply 120624...

  • Page 46: Interior

    i.Series® Models 10.4 Interior Interior features (iPR245 model shown). Schematic Label Description Part Number Label Chart recorder probe 800024-1 Upper monitor probe 800038-1 Probe bottle and glycerin kit 400922-1 Lower monitor probe (except 111 model) 800037-1 Lamp assemblies Refer to subsequent section(s) for part numbers.

  • Page 47: Lighting

    i.Series® Models 10.4.1 Lighting CAUTION Disconnect refrigerator from power when replacing LED lamps. Light features. Schematic Label Description Part Number Label LED lamp 800049-1 10.4.2 Unit Cooler Left: Unit cooler (single-door model shown). Center and right: Unit cooler parts. Schematic Label Description Part Number Label...

  • Page 48: Storage

    i.Series® Models 10.4.3 Storage Storage features (iPR245 model shown). Label Description Part Number Half shelf (includes hardware) 120, 125, 245, and 256 models: 400413-1 shown Full shelf (includes hardware) 111 model: 400414-3 120 and 245 models: 400414-1 125 and 256 models: 400414-2 Roll out basket assembly (includes 111 model: 400751-1 basket, 2 slides, and hardware)

  • Page 49: Door And Hinge

    i.Series® Models 10.4.4 Door and Hinge Door and hinge features (iLR120 model shown). Label Description Part Number Door lock 220540 Door handle pad 320684-1 Upper hinge assembly (includes pin and Left hinge: 400960-2 bracket) Right hinge: 400960-1 Upper hinge bearing 220541 Door gasket 111 model: 321082-1 120, 125, 245, and 456 models: 320726-1...

  • Page 50: Schematics

    i.Series® Models Schematics 11.1 iB, iLR, iPR Models; 11, 20, 25, 45, 56 Cubic Feet MAIN POWER 115V~ (±10%) 60 Hz 230V~ (±10%) 50 Hz 230V~ (±10%) 60 Hz POWER CORD UNIT COOLER Double Door JUNCTION BOX SNUBBER CIRCUIT CIRCUIT BREAKERS *230V~ ONLY MAIN...
  • Page 51 i.Series® Models (iQ) Bezel Mount Components Reset Speaker (iM) USB Host i.C3 Display PCBA SD Memory Card i.C3 LCD w/ Touch Screen LCD Back Light USB Port To LCD LCD Touch Screen (iH) Power Cable (iF) (iG) Ethernet Port USB Data Cable N/L2 Battery RS232...

  • Page 52: Section Iii: Horizon Series™ Models

    Horizon Series™ Models Section III: Horizon Series™ Models Product Configuration 12.1 Install Battery for Backup Power The monitoring system has a battery system, enabling a period of continuous operation if power is lost. NOTE ► The optional Access Control system uses an independent battery for backup power, in the event of a power failure.

  • Page 53: External Monitoring Devices

    Horizon Series™ Models 12.2 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 54: Move Slides And Brackets

    Horizon Series™ Models CAUTION ► Before moving drawers, ensure they are completely empty for safe lifting. ► Maximum basket, drawer, or shelf load is 100 lbs (46 kg). NOTE Before moving storage components, protect stored items in refrigerator from extended exposure to adverse temperature.

  • Page 55: Level The Refrigerator

    Horizon Series™ Models 12.5 Level the Refrigerator NOTE ► Leveling feet are optional. ► Helmer recommends the use of leveling feet. ► A bubble level may be used to ensure the refrigerator is level. Leveling feet must be adjusted to provide unit cooler drainage. Front-to-back Using a wrench, raise or lower leveling feet.

  • Page 56: Settings

    Horizon Series™ Models Settings Through the Horizon Series monitoring and control system, current settings may be viewed and changed. NOTE ► Control Sensor Offset and Hysteresis settings are factory-preset and should not be changed unless directed by Helmer Technical Service. ► Changing temperature settings affects operation of the refrigerator.

  • Page 57: Display Minimum And Maximum Monitor Temperature Recordings

    Horizon Series™ Models 13.2 Display Minimum and Maximum Monitor Temperature Recordings ► This feature is standard on Horizon Series™ models with serial numbers of 2015494 NOTE or higher. Some exceptions may exist. For confirmation on your unit, please contact Helmer Technical Service. ► Units that do not include the minimum and maximum recording feature will not display .C or .F when entering the program mode.

  • Page 58: Refrigerator Temperature Setpoint

    Horizon Series™ Models 13.3 Refrigerator Temperature Setpoint NOTE Default setpoint is 4.0 °C. Change the setpoint if: ► Your organization requires a chamber temperature other than 4.0 °C. Change setpoint: On the monitoring system, press and release SEL to change to Control mode. The CONTROL lamp will illuminate.

  • Page 59: Temperature Alarm Setpoints

    Horizon Series™ Models 13.5 Temperature Alarm Setpoints Temperature alarm setpoints specify the temperature at which an alarm activates. 13.5.1 High Temperature Alarm Change the alarm setpoint: Press and hold the Up and Down Arrows simultaneously for 3 seconds to enter program mode. The LED Display will show .C or .F to indicate Celsius or Fahrenheit.

  • Page 60: Control Sensor Offset

    Horizon Series™ Models Enter the new offset value: Press and hold the Up and Down Arrows simultaneously for 3 seconds to enter program mode. The display will show .C or .F to indicate Celsius or Fahrenheit. Press SEL until only the MONITOR lamp flashes. Hold SET, then press Up or Down Arrow to change the monitor offset.

  • Page 61: Test Alarms

    Horizon Series™ Models 13.7 Test Alarms Test alarms to ensure they are working correctly. The refrigerator has alarms for chamber temperature, power failure, and door open (time). 13.7.1 Chamber Temperature Alarm NOTICE ► Perform the low alarm test before the high alarm test to control the temperature more closely and complete the testing more quickly.

  • Page 62: Maintenance

    Horizon Series™ Models Maintenance NOTE ► Refer to the operation manual for the preventive maintenance schedule. ► Before performing maintenance, protect items in refrigerator from extended exposure to adverse temperature. ► Allow refrigerator temperature to stabilize at setpoint after performing service or after extended door opening.

  • Page 63: Check Monitoring System Battery

    Horizon Series™ Models 14.2 Check Monitoring System Battery The monitoring system does not indicate the charge level of the battery. Regularly test the battery. Replace battery if the test fails or if the battery has been in use for one year. Test the battery: Switch the AC ON/OFF switch OFF.

  • Page 64: Clean The Refrigerator

    Horizon Series™ Models 14.5 Clean the Refrigerator 14.5.1 Condenser Grill CAUTION Disconnect refrigerator from AC power when cleaning condenser grill. In environments where refrigerator is exposed to excessive lint or dust, condenser grill may require cleaning more frequently than stated in preventive maintenance schedule. Clean the condenser grill using a soft brush and a vacuum cleaner.

  • Page 65: Unit Cooler Cover Removal And Installation

    Horizon Series™ Models 14.6 Unit Cooler Cover Removal and Installation If unit cooler cover is not removed as detailed in this procedure the drain port may be damaged. Improper drainage may result in excessive icing and refrigerator’s inability to maintain temperature. Required tools: ► 5/16”...

  • Page 66: Install The Unit Cooler Cover

    Horizon Series™ Models 14.6.2 Install the Unit Cooler Cover Verify unit cooler wiring is connected and routed correctly. Wiring should be routed above copper tube inside the unit cooler. Reconnect wires if they have separated. Attach unit cooler cover. Lift unit cooler cover into place. Front edge of the cover should be behind the unit cooler case.

  • Page 67: Troubleshooting

    Horizon Series™ Models Troubleshooting CAUTION Review all safety instructions prior to troubleshooting. Refer to Section I, Item 2 (Safety). 15.1 General Operation Problems Problem Possible Cause Action A drawer or basket Drawer slide is faulty. ► Confirm the slide is operating correctly. Replace if does not slide easily.
  • Page 68 Horizon Series™ Models Problem Possible Cause Action The chamber Monitor/control board ► Confirm the temperature controller or monitor/ temperature does is faulty. control board is operating correctly. Replace it if not stabilize at the necessary. refrigerator setpoint. Compressor starting ► Confirm the relay is operating correctly. Replace relay is faulty.

  • Page 69: Alarm Activation Problems

    Horizon Series™ Models 15.3 Alarm Activation Problems Problem Possible Cause Action The refrigerator is in Alarm system is faulty. ► Confirm the monitor/controller board and line an alarm condition, connections are functioning correctly. Replace the but the appropriate board if necessary. alarm is not audible or Temperature monitor/ ► Confirm the temperature monitor/controller board...

  • Page 70: Condensation Problems

    Horizon Series™ Models Problem Possible Cause Action The Door Open Door(s) are not ► Confirm the hinge cams are not damaged. alarm is activating closing completely. Replace the cams if necessary. sporadically. Door(s) are closing ► Confirm the door gasket seals completely. but not sealing Replace the door gasket if necessary.
  • Page 71 Horizon Series™ Models Problem Possible Cause Action There is excessive Humid air is entering ► Confirm the refrigerator is level, and the doors humidity on the doors. the chamber. are aligned, closing tightly, and sealing correctly. Correct issues as necessary. ► Confirm the refrigerator is placed properly.

  • Page 72: Parts

    Horizon Series™ Models Parts NOTE ► Before replacing parts, protect items in refrigerator from extended exposure to adverse temperature. ► Allow refrigerator temperature to stabilize at setpoint after replacing parts or after extended door opening. 16.1 Front Front features (HB120 model shown). Schematic Label Description...

  • Page 73: Access Control Option

    Horizon Series™ Models 16.1.1 Access Control Option Access Control features (HB125 model shown). Schematic Label Description Part Number Label Magnetic lock 800138-1 Bezel (all models except 111) With chart recorder: 800074-1 Without chart recorder: 800073-1 Bezel (111 model) With chart recorder: 800058-1 Without chart recorder: 800057-1 Keypad 800007-1...

  • Page 74: Top

    Horizon Series™ Models 16.2 Top features. Schematic Label Description Part Number Label Condenser fan motor 120 V 111 model: 120451 120 and 125 models: 120467 245 and 256 models: 120469 230 V 111 model: 120561 120 and 125 models: 120471 245 and 256 models: 120473 Compressor 120 V 111 model: 800005-1...

  • Page 75: Rear

    Horizon Series™ Models 16.3 Rear Rear features (HB111 model shown). Schematic Label Description Part Number Label Electrical box Refer to subsequent section(s) for part numbers Power cable North American models 120 V: 120630 230 V: 120631 European models 230 V: 120156 115 V Condensate evaporator assembly (includes condensate evaporator, tray, and...

  • Page 76: Electrical Box

    Horizon Series™ Models 16.3.1 Electrical Box Electrical box features (HPR111 model shown). CAUTION Disconnect the refrigerator from AC power before opening the electrical box. Schematic Label Description Part Number Label Alarm buzzer 120160 Chart recorder transformer (optional) Access Control power supply 800035-1 (optional) Defrost timer...

  • Page 77: Interior

    Horizon Series™ Models 16.4 Interior Interior features (HPR245 model shown). Schematic Label Description Part Number Label Chart recorder probe 800024-1 Monitor probe 800029-1 Probe bottle and glycerin kit 400922-1 Lamp assemblies Refer to subsequent section(s) for part numbers Unit cooler Refer to subsequent section(s) for part numbers Door switch 120380...

  • Page 78: Lighting

    Horizon Series™ Models 16.4.1 Lighting CAUTION Disconnect refrigerator from power when removing and replacing LED lamps. Schematic Label Description Part Number Label LED lamp 800049-1 16.4.2 Unit Cooler Left: Unit cooler (single-door model shown). Center and right: Unit cooler parts. Schematic Label Description Part Number...

  • Page 79: Storage

    Horizon Series™ Models 16.4.3 Storage Storage parts (HPR245 model shown). Label Description Part Number Half shelf (includes hardware) 120, 125, 245, and 256 models: 400413-1 shown Full shelf (includes hardware) 111 model: 400414-3 120 and 245 models: 400414-1 125 and 256 models: 400414-2 Roll out basket assembly (includes 111 model: 400751-1 basket, 2 slides, and hardware)

  • Page 80: Door And Hinge

    Horizon Series™ Models 16.4.4 Door and Hinge Door and hinge features (HLR120 model shown). Label Description Part Number Door lock 220540 Upper hinge bracket Left hinge: 400376-2 Right hinge: 400376-1 Hinge bearings 220375 Door gasket 111 model: 321082-1 120, 125, 245, and 456 models: 320726-1 Lower hinge cam (quantity 2) 320742-1 Door stop...

  • Page 81: Schematics

    Horizon Series™ Models Schematics 17.1 HB Model; 11 Cubic Feet (Without Access Control) INTERIOR LIGHT AUDIBLE (HE) ALARM L2-3 Lighting Power Supply (HG) L1-3 LIGHT SWITCH L1-4 12VAC L2-4 (HD) (HO) TEMP CONTROL XFMR, ALARM KEY No Access Control SWITCH (HA) EXTERIOR CONTROL/MONITOR BOARD...

  • Page 82: Hb Model; 11 Cubic Feet (With Access Control)

    Horizon Series™ Models 17.2 HB Model; 11 Cubic Feet (With Access Control) N/L2 *OPTION TO CHART (AXa) Battery RECORDER MAGNET KEY BYPASS SWITCH L1-4 (AXe) MONITOR INTERIOR LIGHT L2-4 (AXd) BATTERY BACKUP Power Supply PCBA *Access Control Option Only AUDIBLE (HE) ALARM L2-3...

  • Page 83: Hb Model; 20, 25, 45, 56 Cubic Feet (Without Access Control)

    Horizon Series™ Models 17.3 HB Model; 20, 25, 45, 56 Cubic Feet (Without Access Control) INTERIOR LIGHT AUDIBLE (HE) ALARM Double Door Only L2-3 Lighting Power Supply *Option (HG) L1-3 LIGHT SWITCH L1-4 12VAC L2-4 (HD) (HO) TEMP CONTROL XFMR, ALARM KEY No Access Control SWITCH...

  • Page 84: Hb Model; 20, 25, 45, 56 Cubic Feet (With Access Control)

    Horizon Series™ Models 17.4 HB Model; 20, 25, 45, 56 Cubic Feet (With Access Control) N/L2 *OPTION TO CHART (AXa) Battery RECORDER MAGNET KEY BYPASS SWITCH L1-4 INTERIOR LIGHT L2-4 (AXd) (AXe) Power Supply PCBA MONITOR *Access Control Option Only BATTERY AUDIBLE (HE)

  • Page 85: Hlr And Hpr Models; 11 Cubic Feet (Without Access Control)

    Horizon Series™ Models 17.5 HLR and HPR Models; 11 Cubic Feet (Without Access Control) INTERIOR LIGHT AUDIBLE L2-3 Lighting Power Supply (HE) ALARM (HG) L1-3 LIGHT SWITCH L1-4 12VAC L2-7 L2-4 L1-7 L1-5 (HD) (HO) TEMP CONTROL XFMR, ALARM KEY 230V~ 115V~ No Access Control...

  • Page 86: Hlr And Hpr Models; 11 Cubic Feet (With Access Control)

    Horizon Series™ Models 17.6 HLR and HPR Models; 11 Cubic Feet (With Access Control) N/L2 *OPTION TO CHART (AXa) Battery RECORDER MAGNET KEY BYPASS SWITCH L1-4 (AXe) INTERIOR LIGHT MONITOR L2-4 (AXd) BATTERY Power Supply PCBA BACKUP *Access Control Option Only (HE) AUDIBLE ALARM L2-3...

  • Page 87: Hlr And Hpr Models; 20, 25, 45, 56 Cubic Feet (Without Access Control)

    Horizon Series™ Models 17.7 HLR and HPR Models; 20, 25, 45, 56 Cubic Feet (Without Access Control) INTERIOR LIGHT AUDIBLE (HE) ALARM Double Door Only L2-3 Lighting Power Supply *Option (HG) L1-3 LIGHT SWITCH L1-4 12VAC L2-4 (HD) (HO) TEMP CONTROL XFMR, ALARM KEY No Access Control SWITCH...

  • Page 88: Hlr And Hpr Models; 20, 25, 45, 56 Cubic Feet (With Access Control)

    Horizon Series™ Models 17.8 HLR and HPR Models; 20, 25, 45, 56 Cubic Feet (With Access Control) N/L2 *OPTION TO CHART (AXa) Battery RECORDER MAGNET KEY BYPASS SWITCH L1-4 INTERIOR LIGHT L2-4 (AXd) (AXe) Power Supply PCBA MONITOR *Access Control Option Only BATTERY (HE) AUDIBLE BACKUP...
  • Page 89 HELMER SCIENTIFIC 14400 Bergen Boulevard Noblesville, IN 46060 USA PH +1.317.773.9073 FAX +1.317.773.9082 www.helmerinc.com...

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