Page 1
Refrigerator Service Manual
i.Series® and Horizon Series™
Model Group i.Series Horizon Series
Blood Bank iB111 (Version D)
Laboratory iLR111 (Version D)
Pharmacy iPR111 (Version D)
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
iB120, iB125, iB245, iB256 (Version D)
iLR120, iLR125, iLR245, iLR256 (Version D)
iPR120, iPR125, iPR245, iPR256 (Version D)
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
Page 2
Document History
Revision Date CO Supersession Revision Description
A 28 JAN 2013 6666 n/a Initial release (as version D, revision A).
► Added new part number for 120 V compressor on double-
door models (245 and 256).
B 03 MAY 2013 8234 B supersedes A
C 26 NOV 2013* 8934 C supersedes B
D 03 MAR 2015 10317 D supersedes C
* Date submitted for Change Order review. Actual release date may vary.
► Added serial number range for each compressor (existing
and new).
► Applicable to i.Series and Horizon Series.
► Removed all references to mechanical Access Control.
► Added references to magnetic Access Control.
► Updated instruction in Section III, Items 13.1 through 13.6.3
to reect use of monitor and control interface with new Min/
Max temperature recording feature.
► Added Document Updates, to Document History page.
► Added Condential / Proprietary Notice, Section I, Item 1.4
and Disclaimer, Section I, Item 1.5.
Document Updates
The document is furnished for information use only, is subject to change without notice and should not be construed as a
commitment by Helmer Scientic. Helmer Scientic 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 Scientic considers
only the most recent revision of this document to be valid.
360127-D/D i
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Contents
Section I: General Information ........................................6
1 About this Manual .......................................................... 6
1.1 Intended Audience. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2 Model References ......................................................................6
1.3 Copyright and Trademark ................................................................6
1.4 Condential / Proprietary Notices ..........................................................6
1.5 Disclaimer ............................................................................6
2 Safety .................................................................... 7
2.1 Labels ...............................................................................7
2.2 Avoiding Injury .........................................................................7
3 Conguration .............................................................. 8
3.1 Model and Input Power ..................................................................8
3.2 Control System ........................................................................8
3.2.1 i.C³® Control System ..............................................................8
3.2.2 Horizon Series Control System .....................................................9
3.3 Temperature Probes ....................................................................9
3.3.1 Fill Probe Bottle .................................................................9
3.3.2 Install Additional Probe Through Top Port .............................................9
3.3.3 Install Additional Probe Through Side Port .............................................9
3.4 Chart Recorder .......................................................................10
3.4.1 Chart Recorder Access ..........................................................10
3.4.2 Install Chart Paper ..............................................................10
4 References and Compliance ................................................. 11
4.1 Alarm Reference ......................................................................11
4.2 Regulatory Compliance .................................................................11
4.3 WEEE Compliance ....................................................................11
5 Warranty ................................................................. 12
5.1 Rel.i™ Product Warranty USA and Canada .................................................12
5.1.1 Rapid Resolution ...............................................................12
5.1.2 Compressor ...................................................................12
5.1.3 Parts .........................................................................12
5.1.4 Labor ........................................................................12
5.1.5 Additional Warranty Information ....................................................12
5.2 Outside of USA and Canada .............................................................13
Section II: i.Series® Models ..........................................14
6 ProductConguration ...................................................... 14
6.1 Install Battery for Backup Power ..........................................................14
6.2 External Monitoring Devices .............................................................15
6.2.1 Connect to Remote Alarm Interface .................................................15
6.3 Move Drawers, Shelves, and Baskets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.4 Drawer Labels ........................................................................16
6.5 Move Slides and Brackets ...............................................................16
6.6 Level the Refrigerator ..................................................................17
6.7 Optional Adapter Kits for Medication Dispensing Locks ........................................17
360127-D/D ii
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7 Settings .................................................................. 17
7.1 Home Screen ........................................................................18
7.1.1 Home Screen Functions ..........................................................18
7.2 Temperature Settings ..................................................................18
7.2.1 Refrigerator Temperature Setpoint ..................................................19
7.2.2 Hysteresis Setpoint .............................................................19
7.2.3 Delay on Start-Up ...............................................................19
7.2.4 Control Relay Probe Error Duty Cycle ...............................................20
7.3 Temperature Calibration ................................................................20
7.3.1 Calibrate Monitor Probes .........................................................20
7.3.2 Control Sensor Offset ............................................................21
7.3.3 Calibrate Compressor and Evaporator Probe .........................................22
7.3.4 Factory Default Settings ..........................................................22
7.3.5 Additional Factory Default Settings for Laboratory and Pharmacy Models ...................24
7.3.6 Restore Factory Default Settings ...................................................24
7.3.7 Change Factory Settings .........................................................25
7.4 Test Alarms ..........................................................................25
7.4.1 Automatic Chamber Temperature Alarm Test ..........................................25
7.4.2 Manual Chamber Alarm Test ......................................................26
7.4.3 Power Failure Alarm Test .........................................................27
7.4.4 Door Open Alarm Test ...........................................................27
7.5 Upgrade System Firmware ..............................................................27
7.6 Calibrate the Touchscreen ...............................................................27
7.7 View Manufacturer and Product Information .................................................27
8 Maintenance .............................................................. 28
8.1 Recharge Refrigerant ..................................................................28
8.2 Check Monitoring System Battery .........................................................29
8.3 Check Optional Access Control System Battery ..............................................29
8.4 Replace LED Lamps ...................................................................29
8.5 Clean the Refrigerator ..................................................................29
8.5.1 Condenser Grill ................................................................29
8.5.2 Exterior .......................................................................30
8.5.3 Interior .......................................................................30
8.5.4 Door Gaskets ..................................................................30
8.5.5 Clean and Rell Probe Bottles .....................................................30
8.5.6 i.C³® Touchscreen ...............................................................30
8.6 Unit Cooler Cover Removal and Installation .................................................31
8.6.1 Remove the Unit Cooler Cover ....................................................31
8.6.2 Install the Unit Cooler Cover ......................................................31
9 Troubleshooting ........................................................... 33
9.1 General Operation Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
9.2 Chamber Temperature Problems .........................................................34
9.3 Alarm Activation Problems ..............................................................35
9.4 Testing Problems ......................................................................38
9.5 Condensation Problems ................................................................38
10 Parts .................................................................... 40
10.1 Front ...............................................................................40
10.1.1 Access Control Option ...........................................................41
10.1.2 Control System and Display .......................................................41
10.2 Top. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
10.3 Rear ................................................................................43
360127-D/D iii
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10.3.1 Electrical Box ..................................................................44
10.4 Interior ..............................................................................45
10.4.1 Lighting .......................................................................46
10.4.2 Unit Cooler ....................................................................46
10.4.3 Storage .......................................................................47
10.4.4 Door and Hinge ................................................................48
11 Schematics ...............................................................49
11.1 iB, iLR, iPR Models; 11, 20, 25, 45, 56 Cubic Feet ............................................49
Section III: Horizon Series™ Models ..................................51
12ProductConguration ...................................................... 51
12.1 Install Battery for Backup Power ..........................................................51
12.2 External Monitoring Devices .............................................................52
12.2.1 Connect to Remote Alarm Interface .................................................52
12.3 Move Drawers, Shelves, and Baskets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
12.4 Move Slides and Brackets ...............................................................53
12.5 Level the Refrigerator ..................................................................54
12.6 Optional Adapter Kits for Medication Dispensing Locks ........................................54
13 Settings .................................................................. 55
13.1 Monitor and Control Interface ............................................................55
13.2 Display Minimum and Maximum Monitor Temperature Recordings ...............................56
13.3 Refrigerator Temperature Setpoint ........................................................57
13.4 Table of Parameters ...................................................................57
13.4.1 View Alarm Setpoints and Offset Values .............................................57
13.4.2 Temperature Units ..............................................................57
13.5 Temperature Alarm Setpoints ............................................................58
13.5.1 High Temperature Alarm ..........................................................58
13.5.2 Low Temperature Alarm ..........................................................58
13.6 Temperature Calibration Offsets ..........................................................58
13.6.1 Monitor Offset ..................................................................58
13.6.2 Control Sensor Offset ............................................................59
13.6.3 Hysteresis .....................................................................59
13.7 Test Alarms ..........................................................................60
13.7.1 Chamber Temperature Alarm ......................................................60
13.7.2 Power Failure Alarm .............................................................60
13.7.3 Door Open Alarm ...............................................................60
14 Maintenance .............................................................. 61
14.1 Recharge Refrigerant ..................................................................61
14.2 Check Monitoring System Battery .........................................................62
14.3 Check Optional Access Control System Battery ..............................................62
14.4 Replace LED Lamps ...................................................................62
14.5 Clean the Refrigerator ..................................................................63
14.5.1 Condenser Grill ................................................................63
14.5.2 Exterior .......................................................................63
14.5.3 Interior .......................................................................63
14.5.4 Door Gaskets ..................................................................63
14.5.5 Clean and Rell Probe Bottle ......................................................63
14.6 Unit Cooler Cover Removal and Installation .................................................64
14.6.1 Remove the Unit Cooler Cover ....................................................64
14.6.2 Install the Unit Cooler Cover ......................................................65
360127-D/D iv
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15 Troubleshooting ........................................................... 66
15.1 General Operation Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
15.2 Chamber Temperature Problems .........................................................66
15.3 Alarm Activation Problems ..............................................................68
15.4 Condensation Problems ................................................................69
16 Parts .................................................................... 71
16.1 Front ...............................................................................71
16.1.1 Access Control Option ...........................................................72
16.1.2 Monitor and Control System and Display .............................................72
16.2 Top. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
16.3 Rear ................................................................................74
16.3.1 Electrical Box ..................................................................75
16.4 Interior ..............................................................................76
16.4.1 Lighting .......................................................................77
16.4.2 Unit Cooler ....................................................................77
16.4.3 Storage .......................................................................78
16.4.4 Door and Hinge ................................................................79
17 Schematics ............................................................... 80
17.1 HB Model; 11 Cubic Feet (Without Access Control) ...........................................80
17.2 HB Model; 11 Cubic Feet (With Access Control) ..............................................81
17.3 HB Model; 20, 25, 45, 56 Cubic Feet (Without Access Control) ..................................82
17.4 HB Model; 20, 25, 45, 56 Cubic Feet (With Access Control). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
17.5 HLR and HPR Models; 11 Cubic Feet (Without Access Control) .................................84
17.6 HLR and HPR Models; 11 Cubic Feet (With Access Control) ....................................85
17.7 HLR and HPR Models; 20, 25, 45, 56 Cubic Feet (Without Access Control) ........................86
17.8 HLR and HPR Models; 20, 25, 45, 56 Cubic Feet (With Access Control) ...........................87
360127-D/D v
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Section I: General Information
1 About this Manual
1.1 Intended Audience
This manual is intended for use by end users of the refrigerator and authorized service technicians.
1.2 Model References
Generic references are used throughout this manual to group models that contain similar features.
For example, “125 models” refers to all models of that size (iB125, HB125, iLR125, HLR125, iPR125,
HPR125). This manual covers all upright refrigerators, which may be identied singly, by their size, or by
their respective “Series.”
1.3 Copyright and Trademark
Helmer®, i.Series®, i.C³®, Horizon Series™, and Rel.i™ are registered trademarks or trademarks of
Helmer, Inc. in the United States of America. Copyright © 2015 Helmer, Inc. All other trademarks and
registered trademarks are the property of their respective owners.
Helmer, Inc., doing business as (DBA) Helmer Scientic and Helmer.
1.4 Condential/ProprietaryNotices
General Information
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 Scientic products is expressly
prohibited.
1.5 Disclaimer
This manual is intended as a guide to provide the operator with necessary instructions on the proper use
and maintenance of certain Helmer Scientic products.
Any failure to follow the instructions as described could result in impaired product function, injury to the
operator or others, or void applicable product warranties. Helmer Scientic accepts no responsibility for
liability resulting from improper use or maintenance of its products.
The screenshots and component images appearing in this guide are provided for illustrative purposes
only, and may vary slightly from the actual software screens and/or product components.
360127-D/D 6
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2 Safety
!
Includes general safety information for refrigerator operation.
2.1 Labels
General Information
Caution: Risk of damage
to equipment or danger to
operator
Caution: Hot surface Earth / ground terminal
Caution: Shock/electrical
hazard
2.2 Avoiding Injury
► Review safety instructions before installing, using, or maintaining the equipment.
► Do not open multiple, loaded drawers at the same time.
► Do not move a unit whose load exceeds 900 lbs / 408 kg (single-door units) or 1350 lbs / 612 kg (double-
door units).
► Before moving unit, ensure casters are unlocked and free of debris.
► Never physically restrict any moving component.
► Avoid removing electrical service panels and access panels unless so instructed.
► Use manufacturer supplied power cords only.
CAUTION Decontaminate parts prior to sending for service or repair. Contact Helmer or your
Caution: Unlock all casters
Protective earth / ground
terminal
distributor for decontamination instructions and a Return Authorization Number.
360127-D/D 7
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3 Conguration
3.1 Model and Input Power
NOTE Service information varies depending on the model and power requirements.
This information appears on the product specication 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.
REF
ILR125
SN
2000000
Version D
www.helmerinc.com
Left: Chamber label. Right: Product Specication label.
Label Description
A Model (REF)
B Serial number
C Version
D Power requirements
REF
A
SN
B
Version D
C
Laboratory Refrigerator
Weight 476 lb / 216 kg
UL 61010-1/CSA 61010-1
ILR125
i.Series®
2000000
CUS
Certified
14400 Bergen Boulevard
2012
0086
Noblesville, IN USA
www.helmerinc.com
Voltage 115 V
HZ 60
Amps 7.5 A
Power 0.86 kW
Refrigerant Type: 134A
Made in USA
General Information
D
3.2 Control System
NOTE Service information varies depending on the control system.
Helmer refrigerators have one of two control systems installed. The type of control system varies by model.
3.2.1 i.C³® Control System
i.Series refrigerators are equipped with the i.C³ monitoring and control system. The i.C³ system combines
temperature control and monitoring into a single interface.
360127-D/D 8
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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.
3.3 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).
For each probe bottle, use:
► 4 oz. (120 mL) of product simulation solution (10:1 ratio of water to glycerin).
General Information
Left: Probe bottle with temperature and chart recorder probes.
Middle: Top access port. Right: Side access port.
3.3.1 Fill Probe Bottle
NOTE Temperature probes are fragile; handle with care.
1 Remove all probes from bottle and remove bottle from bracket.
2 Remove cap and ll with 4 oz. (120 mL) of product simulation solution.
3 Install cap and place bottle in bracket.
4 Replace probes, immersing at least 2” (50 mm) in solution.
3.3.2 Install Additional Probe Through Top Port 1 Peel back putty to expose port. 2 Insert probe through port into chamber. 3 Insert probe into bottle. 4 Replace putty, ensuring a tight seal.
3.3.3 Install Additional Probe Through Side Port 1 Remove interior and exterior plugs to expose side access port. 2 Insert probe through port into chamber. 3 Insert probe into bottle. 4 Replace plugs, ensuring a tight seal.
360127-D/D 9
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3.4 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.
Prior to use:
► Install battery.
► Add paper.
► Calibrate chart recorder to match upper chamber temperature.
3.4.1 Chart Recorder Access
Open door by either pressing and releasing, or by pulling door open.
General Information
3.4.2 Install Chart Paper 1 Press and hold C button. When stylus begins to move left, release button. The LED ashes to
indicate current temperature range.
2 When stylus stops moving, remove chart knob then move knob up and away.
3 Place chart paper on chart recorder.
4 Gently lift stylus and rotate paper so current time line corresponds to time line groove.
5 Hold chart paper and reinstall chart knob.
NOTE For accurate temperature reading, ensure that current time is aligned with time line
groove when chart knob is tightened.
6 Conrm temperature range is set to the correct value.
7 Press and hold C button. When stylus begins to move right, release button.
8 Conrm stylus is marking temperature correctly.
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4 References and Compliance
4.1 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 A, V, R
Low Temperature A, V, R
Compressor Temperature A, V, R (i.Series)
Door Open (Time) A, V, R
Power Failure A, V, R
Low Battery V (i.Series)
No Battery A, V, R (i.Series)
Probe Failure A, V, R
Communication Failure A, V, R (i.Series)
4.2 Regulatory Compliance
This device complies with the requirements of directive 93/42/EEC concerning
Medical Devices, as amended by 2007/47/EC.
Sound level is less than 70 dB(A).
General Information
0086
EC REP
Emergo Europe
Molenstraat 15
2513 BH
The Hague, Netherlands
4.3 WEEE Compliance
The WEEE (waste electrical and electronic equipment) symbol (right) indicates
compliance with European Union Directive WEEE 2002/96/EC and
applicable provisions. The directive sets requirements for labeling and
disposal of certain products in affected countries.
When disposing of this product in countries affected by this directive:
► Do not dispose of this product as unsorted municipal waste.
► Collect this product separately.
► Use collection and return systems available locally.
For more information on the return, recovery, or recycling of this product, contact your local distributor.
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5 Warranty
5.1 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. Helmer will oversee the handling of your warranty service from start to nish.
Therefore, Helmer must give advance authorization for all service calls and/or parts needs relating to a
warranty issue. Any repeat service calls must also be authorized as well. This allows for proper diagnosis
and action. Helmer will not be responsible for charges incurred for service calls made by third parties prior
to authorization from Helmer. Helmer retains the right to replace any product in lieu of servicing it in the eld.
5.1.2 Compressor
For the warranty period listed below, Helmer will supply the refrigeration compressor, if it is determined
to be defective, at no charge, including freight. Helmer will not be liable for installation, refrigerant, or
miscellaneous charges required to install the compressor beyond the rst year of the warranty period.
► i.Series model compressor warranty period is seven (7) years.
► Horizon Series model compressor warranty period is ve (5) years.
General Information
5.1.3 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, lters, light bulbs, and door gaskets are excluded from this warranty
coverage. Inspection of defective parts by Helmer will be nal in determining warranty status. Warranty
procedures must be followed in all events.
5.1.4 Labor
For a period of one (1) year, Helmer will cover repair labor costs (including travel) and the cost of
refrigerant and supplies necessary to perform authorized repairs. Repair service must be performed by
an authorized Helmer service agency following the authorization process detailed above. Alternatively,
your facility’s staff may work with a Helmer technician to make repairs. Labor costs for repairs made by
unauthorized service personnel, or without the assistance of a Helmer technician, will be the responsibility
of the end user.
5.1.5 Additional Warranty Information
The time periods set forth above begin two (2) weeks after the original date of shipment from Helmer.
Warranty procedures set forth above must be followed in all events.
THERE ARE NO WARRANTIES WHICH EXTEND BEYOND THE DESCRIPTION ON THE FACE
HEREOF. THIS WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES, EXPRESS
OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY WARRANTY OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE. NO WARRANTIES OF MERCHANTABILITY OR FITNESS
FOR PARTICULAR PURPOSE SHALL APPLY.
THE LIABILITY, IF ANY, OF HELMER FOR DIRECT DAMAGES WHETHER ARISING FROM A
BREACH OF ANY SALES AGREEMENT, BREACH OF WARRANTY, NEGLIGENCE, OR INDEMNITY,
STRICT LIABILITY OR OTHER TORT, OR OTHERWISE WITH RESPECT TO THE GOODS OR ANY
360127-D/D 12
Page 14
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.
This warranty does not cover damages caused in transit, during installation by accident, misuse, re, ood, or
acts of God. Further, this warranty will not be valid if Helmer determines that the failure was caused by a lack
of performing recommended equipment maintenance (per Helmer manual) or by using the product in a manner
other than for its intended use. Installation and calibration are not covered under this warranty agreement.
5.2 Outside of USA and Canada
Consult your local distributor for warranty information.
General Information
360127-D/D 13
Page 15
Section II: i.Series® Models
!
6 ProductConguration
6.1 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.
► The monitoring system will start on battery power alone. If the refrigerator was
previously not connected to AC power and the battery is switched on, the monitoring
system will begin running on battery power.
Battery life varies by manufacturer as well as voltage level remaining. Providing full power is available
and no battery-related alarms are active, backup power for the monitoring system is available for up to
20 hours (the Low Battery alarm will activate after approximately 18 hours of battery use). Providing full
power is available, backup power for the optional Access Control system is available for up to 2.5 hours.
CAUTION ► Before installing or replacing batteries, switch the power and battery OFF.
Disconnect the refrigerator from AC power.
i.Series® Models
NOTE If AC power is lost, the monitoring system will automatically disable some features to
prolong battery power. Data collection will continue until battery power is depleted.
The battery is located on the top of the refrigerator. For 111 models, a removable panel provides access
to the battery.
Monitoring system backup battery (supplies power to optional Access Control system).
Battery is switched off for shipping. Switch battery on to provide monitoring system and optional Access
Control system with backup power in the event of AC power failure.
360127-D/D 14
Page 16
6.2 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.
Requirements for your alarm system determine which alarm wires must connect to terminals.
CAUTION ► The interface on the remote alarm monitoring system is intended for connection to
the end user’s central alarm system(s) that uses normally-open or normally-closed
dry contacts.
► If an external power supply exceeding 33 V (RMS) or 70 V (DC) is connected to the
remote alarm monitoring system’s circuit, the remote alarm will not function properly;
may be damaged; or may result in injury to the user.
The terminals on the remote alarm interface have the following maximum load capacity:
► 0.5 A at 125 V (AC): 1 A at 250 V (DC)
6.2.1 Connect to Remote Alarm Interface 1 Switch AC ON/OFF switch OFF. Switch battery switch OFF. 2 On the electrical box, locate the remote alarm terminals. 3 Connect remote alarm wires to appropriate terminals, according to requirements for your alarm system. 4 Use a cable tie to relieve strain on alarm wires (as necessary). 5 Switch battery switch ON. Switch AC ON/OFF switch ON. 6 Touch Mute to disable the high temperature alarm while refrigerator reaches operating temperature.
i.Series® Models
6.3 Move Drawers, Shelves, and Baskets
Storage features.
360127-D/D 15
Page 17
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
1 Pull drawer or basket out until it stops.
2 On the right rail, locate the release tab and press downward.
3 While holding the right release tab downward, locate the release tab on the left rail and press upward.
4 Pull drawer or basket free of the slides.
Install a drawer or basket
1 Align end guides on drawer or basket with the slides.
2 Gently push drawer or basket into chamber until it stops.
3 Pull drawer or basket out until it stops; check for smooth operation.
Remove a shelf
1 With one hand, lift front edge of the shelf from the front brackets.
2 With the other hand, reach under the shelf and bump rear edge of the shelf upward to disengage rear
brackets.
Install a shelf
1 Insert shelf into chamber, placing it on brackets.
2 Gently bump rear edge of the shelf downward to engage brackets.
3 Pulling shelf forward gently; shelf should not disengage from rear brackets.
6.4 Drawer Labels
Drawer with sample label (not provided).
6.5 Move Slides and Brackets
Remove drawer slides
1 Using a screwdriver, remove front bracket retainers.
2 Tap front brackets upward to disengage standards.
3 Remove slides from standards.
Install drawer slides
1 Insert slides into standard at appropriate height.
2 Tap front brackets downward to engage standards.
3 Using a screwdriver, install front bracket retainers.
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Remove shelf brackets
1 Using a screwdriver, remove front bracket retainers.
2 Tap front brackets upward to disengage standards.
3 Remove front brackets from standards.
Install shelf brackets
1 Insert front brackets into standard at appropriate height.
2 Tap front brackets downward to engage standards.
3 Using a screwdriver, install front bracket retainers.
6.6 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
1 Using a wrench, raise or lower leveling feet.
2 When refrigerator is properly leveled, bottom of the unit cooler will slope downward from front to back
(toward the condensate drain line).
i.Series® Models
Side-to-side
1 Using a wrench, raise or lower leveling feet.
2 When refrigerator is properly leveled, bottom of the unit cooler will be horizontal (parallel to the oor).
6.7 Optional Adapter Kits for Medication Dispensing Locks
Contact Helmer Technical Service or your distributor for service documentation pertaining to medication
dispensing locks.
7 Settings
Through the i.C³ monitoring and control system, current settings may be viewed and changed. To view
settings, touch Home, i.C³ APPS, Settings. Use a touch-drag motion to scroll up or down to display
additional settings.
NOTE ► If the Settings screen is password protected or if viewing settings for the rst time,
enter factory default password of “1234”.
► 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 refrigerator. 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, rst enter
the Settings mode, then the setting. The method for accessing the Settings mode for each setting varies.
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7.1 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 User Guide for options available on all i.C³ screens.
► View current temperature readings
► View the current system time and date
► Access any of the ve customizable applications (touch i.C³ APPS for additional applications)
► View detailed information about current or previous alarm events or door open data
► View whether the monitoring system is running on battery power
► Mute audible alarms
► Turn the chamber light on and off
► View a graph of the chamber temperature
i.Series® Models
7.2 Temperature Settings
Temperature setpoint values are programmed at the factory. Setpoints can be viewed and changed
through the i.C³ monitoring and control system. To view temperature setpoints, touch Home, i.C³ APPS,
Settings. Scroll down and touch Temperature Setpoints.
Temperature Controller Programs screen.
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Setting Initial Factory Value
Refrigerator Setpoint 4.0 °C
Hysteresis Setpoint 2.0 °C (iB111)
Delay on Start-Up 2 minutes
Duty Cycle of Control Relay during Probe Failure 50%
7.2.1 Refrigerator Temperature Setpoint
Change the setpoint if:
► Your organization requires a chamber temperature other than 4.0 °C.
NOTE If the Settings screen is password protected or if viewing settings for the rst time, enter
factory default password of “1234”.
Perform the following:
1 Touch i.C³ APPS, i.C³ Settings.
2 Enter the Settings password.
3 Touch Temperature Setpoints.
4 Touch + or – on the Temperature Setpoint spin box.
► The setpoint is the temperature at which the refrigerator operates.
i.Series® Models
0.8 °C (iLR111 and iPR111)
1.0 °C (iLR120, iLR125, iPR120, iPR125)
1.5 °C (245, 256)
7.2.2 Hysteresis Setpoint
► Default setpoint for 120 and 125 models is 1.0 °C.
► Default setpoint for 245 and 256 models is 1.5 °C.
► Default setpoint for iB111 model is 2.0 °C.
► Default setpoint for iLR111 and iPR111 models is 0.8 °C.
► Allowable temperature variance on each side of the refrigerator setpoint.
NOTE Hysteresis is factory-preset and should not be changed unless directed by Helmer
Technical Service.
7.2.3 Delay on Start-Up
NOTE Default Delay on Start-Up is two minutes.
1 Touch i.C³ APPS, i.C³ Settings.
2 Enter the Settings password.
3 Touch Temperature Setpoints.
4 Touch + or – on the Delay on Start-Up spin box.
► Compressor startup is delayed to allow the i.C³ monitoring and control system to start rst.
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7.2.4 Control Relay Probe Error Duty Cycle
NOTE Default Duty Cycle of Control Relay During Probe Error is 50%.
1 Touch i.C³ APPS, i.C³ Settings.
2 Enter the Settings password.
3 Touch Temperature Setpoints.
4 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.
7.3 Temperature Calibration
Temperature calibration values are programmed at the factory. Calibration values can be viewed and
changed through the i.C³ monitoring and control system. To view calibration settings, touch Home, i.C³
APPS, Settings, Temperature Calibration. Details for each setting are displayed.
i.Series® Models
Temperature Calibration screen.
NOTE ► If the Settings screen is password protected or if viewing settings for the rst time,
enter factory default password of “1234”.
► When there is no interaction for two minutes, the Temperature Setpoint screen closes
and returns to the Home screen.
► Control Sensor and Control Sensor Offset, Evaporator Defrost and Evaporator
Defrost Offset, and Compressor Probe Temperature calibration settings are factorypreset and should not be changed unless directed by Helmer Technical Service.
7.3.1 Calibrate Monitor Probes
Verify monitor probes are reading chamber temperature correctly by comparing monitor probe readings
to the temperature measured by a calibrated reference thermometer. If monitor probes are not reading
correctly, change the value displayed on the monitor.
NOTE ► Ensure product simulation bottle is full of solution.
► Probes in the bottles are connected to the monitoring system and sense chamber
temperature. These probes activate the temperature alarms but do not affect
refrigerator setpoint.
► Default setting for monitor probes is 4.0°C.
► Value is factory-preset.
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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:
1 Remove upper monitor probe from the probe bottle.
2 Unscrew the cap from the bottle.
3 Attach the thermometer to the monitor probe, and place them in the bottle. The probe and
thermometer should be immersed at least 2” (50 mm).
4 Close the door and allow the chamber temperature to stabilize.
5 Observe and note the thermometer temperature.
6 Touch, i.C³ APPS, Settings, Temperature Calibration.
7 Touch + or – on the Upper Temperature spin box to increase or decrease the value to match the
measured value. The message “New Setting Saved” appears next to the spin box.
8 Remove thermometer from probe.
9 Replace bottle cap, ensuring a tight t.
10 Place probe in bottle, immersing at least 2” (50 mm).
Calibrate lower monitor probe:
1 Remove probe from the lower probe bottle.
2 Unscrew the cap from the bottle.
3 Attach the thermometer to the monitor probe, and place them in the bottle. The probe and
thermometer should be immersed at least 2” (50 mm).
4 Close the door and allow the chamber temperature to stabilize.
5 Observe and note the thermometer temperature.
6 Touch, i.C³ APPS, Settings, Temperature Calibration.
7 Touch + or – on the Lower Temperature spin box to increase or decrease the value to match the
measured value. The message “New Setting Saved” appears next to the spin box.
8 Remove thermometer from probe.
9 Replace bottle cap, ensuring a tight t.
10 Place probe in bottle, immersing at least 2” (50 mm).
7.3.2 Control Sensor Offset
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 refrigerator setpoint by activating the
compressor when the control probe registers above the setpoint based on the hysteresis value.
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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 veried and accurate prior to adjusting the
Control Sensor Offset.
1 View and record the Refrigerator Setpoint. (Reference Section II, Item 7.2.1)
2 Allow the unit to run with calibrated monitor temperature for several compressor cycles, and record
the average monitor temperature .
3 View and record the current Control Offset value.
4 Subtract the Refrigerator Setpoint from the average monitor temperature and record the difference.
5 Add the current Control Offset value to the recorded difference determined in the previous step to
establish the new Control Offset value.
EXAMPLE 1 Refrigerator Setpoint is 4.0
2 Average monitor temperature is 5.2
3 Current Control Offset is 0.3
4 Subtract: 5.2 - 4.0 = 1.2; difference between average temperature and setpoint
5 Add 0.3 + 1.2 = 1.5; new Control Offset value
Enter the new offset value:
1 Touch Home, i.C³ APPS, Settings.
2 Enter the Settings password.
3 Touch Temperature Calibration.
4 Touch + or – on the Control Sensor Offset spin box.
► Raise the offset value to lower chamber temperature; lower the offset value to raise chamber
temperature.
5 Touch Home to return to home screen.
7.3.3 Calibrate Compressor and Evaporator Probe
The compressor and evaporator temperature probes have been factory-calibrated. Changing the
calibration settings is not typically necessary and should not be performed unless directed by Helmer
Technical Service.
7.3.4 Factory Default Settings
Settings listed below may be simultaneously returned to factory default values.
NOTE The factory default settings may not be the same as the settings that were factory-
calibrated before the refrigerator was shipped.
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i.Series® Models
Setting Restored Value
Home Screen Application Icons i.C³ APPS, Temperature Alarm Test, Temperature Graph, Information
Display Brightness High (3 symbols)
Password (for Settings screen) 1234
Sounds On
Alarm Volume 9
Alarm Tone On
Temperature Calibration Values Not affected by restoring factory settings
Unit ID Serial number entered at factory
Date Format MM/DD/YYYY
Day Not affected (maintained in real-time clock)
Month
Year
Time Format 12-hour
Minute Not affected (maintained in real-time clock)
Hour
AM/PM
Language Language previously selected during setup
Temperature Units °C
Password Protection (for Settings screen) On
Temperature Graph Screensaver On
Access Control (optional) as Home Page On
Light Off Delay (on/off) On
Light Off Delay 5 minutes
High Temperature Alarm Setpoint 5.5 °C
High Temperature Alarm Time Delay 0 minutes
Low Temperature Alarm Setpoint * 1.5 °C (iB models)
Low Temperature Alarm Time Delay 0 minutes
Power Failure Alarm Time Delay 1 minute
Probe Failure Alarm Time Delay 0 minutes
Door Open (Time) Alarm Time Delay 3 minutes
Compressor Temperature Alarm Setpoint 50.0 °C
Compressor Temperature Alarm Time Delay 0 minutes
Chamber Setpoint 4.0 °C
Chamber Hysteresis 1.5 °C (iB111)
Delay on Start-Up 2 minutes
Logs, Download
2.0 °C (iLR and iPR models)
0.8 °C iLR111, iPR111)
1.0 °C (iLR120, iLR125, iPR120, iPR125)
* Includes laboratory (iLR) and pharmacy (iPR) models originally set at 2.0 °C.
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7.3.5 Additional Factory Default Settings for Laboratory and Pharmacy Models
Setting Restored Value
Control Relay Probe Failure Duty Cycle 50%
Defrost Event #1 On/Off On (except 111 models)
Defrost Event #1 Start Time 12:00 AM
Defrost Event #2 On/Off On
Defrost Event #2 Start Time 8:00 AM
Defrost Event #3 On/Off On (except 111 models)
Defrost Event #3 Start Time 4:00 PM
Defrost Event #4 On/Off Off
Defrost Event #4 Start Time n/a
Defrost Time/Defrost Safety Operation Time 10 minutes (15 minutes for 111 models)
NOTE Defrost event settings are only applicable to laboratory (iLR) and pharmacy (iPR)
refrigerators.
7.3.6 Restore Factory Default Settings
Restore settings:
1 Touch Home, i.C³ APPS, Settings, Restore Factory Settings.
2 A “Are you sure you want to restore factory settings?” message appears. Do one of the following:
► Touch Yes. The message screen closes and factory settings are restored.
► Touch No. The message screen closes and factory settings are not restored.
i.Series® Models
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7.3.7 Change Factory Settings
Several of the refrigerator operating parameters are congured 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
Light Icon Toggle the light icon on or off
Temperature Controller Page Enable or disable the temperature controller screen
Factory settings may be viewed and changed. Contact Helmer Technical Service to verify if changing
factory settings is necessary, and for instructions in accessing Factory Settings screen.
7.4 Test Alarms
Test alarms to ensure they are working correctly. The refrigerator has alarms for chamber temperature,
compressor temperature, door open (time), power failure, low battery, and power failure.
7.4.1 Automatic Chamber Temperature Alarm Test
i.Series® Models
NOTE ► Test can be aborted by touching Cancel Test.
► Test is only applicable to the upper monitor probe.
► Test takes less than ve minutes.
► If the temperature alarm test does not automatically complete within two minutes,
restart the i.C³ monitoring system.
When performing an automatic temperature alarm test, the Peiltier device heats or cools the upper monitor
probe until the high or low alarm setpoint is reached. An event is added to the Event Log to indicate a
temperature alarm was activated. The Alarm Test icon is displayed on the Temperature Graph to indicate
the temperature alarm was test-induced.
Test the low alarm:
1 Identify current setting for low alarm setpoint.
2 Touch Home, i.C³ APPS, Temperature Alarm Test.
3 Touch Low Alarm Test.
4 “Peltier Test Probe Cooling” message appears.
5 When displayed temperature reaches the alarm setpoint, an alarm is activated.
6 When completed, “Test Complete” appears.
7 Touch Home, i.C³ APPS, Information Logs, Event Log. Touch the event to view event details.
8 Observe the temperature at the time of the low temperature alarm event. Compare this to the alarm
setpoint. If values do not match, refer to Section II, Item 9 (Troubleshooting).
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Test the high alarm:
1 Identify current setting for high alarm setpoint.
2 Touch Home, i.C³ APPS, Temperature Alarm Test.
3 Touch High Alarm Test.
4 “Peltier Test Probe Warming” message appears.
5 When displayed temperature reaches the alarm setpoint, the temperature reading turns red.
6 When completed, “Test Complete” appears.
7 Touch Home, i.C³ APPS, Information Logs, Event Log. Touch the event to view event details.
8 Observe the temperature at the time of the high temperature alarm event. Compare this to the alarm
setpoint. If values do not match, refer to Section II, Item 9 (Troubleshooting).
Cancel the test:
1 Touch Home, i.C³ APPS, Temperature Alarm Test.
2 Touch Cancel Test.
NOTE When cancelling an automatic test, the message indicating the test is in progress clears
immediately. If a setpoint was reached before the test was cancelled, the alarm activates
and clears as described earlier.
7.4.2 Manual Chamber Alarm Test
i.Series® Models
NOTICE ► Perform the low alarm test before the high alarm test to control the temperature more
closely and complete the testing more quickly.
► Before testing alarms, protect items in the unit from extended exposure to adverse
temperature.
► Temperature probes are fragile; handle with care.
Obtain:
► (1) glass lled with 1/2 crushed ice and 1/2 water
► (1) 8 oz. (250 mL) glass of luke warm water
Test the low alarm:
1 Identify setting for low alarm setpoint.
2 Remove upper monitor probe from bottle.
3 Immerse probe in glass lled with water and crushed ice mixture.
4 When low temperature alarm sounds, note the temperature on the i.C³ display.
5 Compare the temperature at which the alarm sounds to the low alarm setpoint. If values do not
match, refer to Section II, Item 9 (Troubleshooting).
Test the high alarm:
1 Identify setting for high alarm setpoint.
2 Immerse upper monitor probe in glass of luke warm water.
3 When high temperature alarm sounds, note the temperature on the i.C³ display.
4 Compare the temperature at which the alarm sounds to the high alarm setpoint. If values do not
match, refer to Section II, Item 9 (Troubleshooting).
5 Remove probe from warm water.
6 Place upper monitor probe in probe bottle, immersing it at least 2” (50 mm).
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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.
1 Change Power Failure delay setting to 0 minutes.
a Touch Home, Settings, Alarm Settings.
b Touch + or – on the Power Failure spin box to change the value to 0.
2 Switch AC ON/OFF switch OFF. Power failure alarm will activate immediately.
3 Switch AC ON/OFF switch ON. Power failure alarm will clear and audible alarm will cease.
4 Change Power Failure time delay to the original setting.
7.4.4 Door Open Alarm Test 1 Change Door Open (Time) delay setting to 0 minutes.
a Touch Home, Settings, Alarm Settings.
b Touch + or – on the Door Open (Time) spin box to change the value to 0.
2 Open door. Alarm will activate immediately.
3 Close door. Alarm will clear and audible alarm will cease.
4 Change the Door Open (Time) setting to the original setting.
7.5 Upgrade System Firmware
i.Series® Models
Helmer may occasionally issue updates for the i.C³ rmware. Follow upgrade instructions included with
the rmware update.
7.6 Calibrate the Touchscreen
The i.C³ touchscreen has been calibrated at the factory to ensure that when the screen is touched,
the desired key touch is selected. If the i.C³ touchscreen or display circuit board is replaced after the
refrigerator has been shipped from the factory, the touchscreen must be recalibrated. If the screen must
be recalibrated, contact Helmer Technical Service to obtain the calibration le.
Calibrate the screen:
1 Insert the ash memory device with the calibration program into the USB port on the i.C³ bezel. The
ash memory device can be inserted while any screen displayed on the i.C³.
2 Wait 15 to 30 seconds for the calibration le to load.
3 When the calibration screen appears, remove the ash memory device from the USB port.
4 Follow the on-screen instructions, touching the crosshair icons as they appear on the screen.
NOTE For accurate calibration results and to avoid damage to the touchscreen, touch the
crosshairs with the eraser end of a pencil.
5 After all crosshairs have been touched, the i.C³ will reboot and display the language screen.
NOTE If the screen was unintentionally touched outside of any of the crosshair icons during
calibration, the screen may be recalibrated using the process outlined above.
7.7 View Manufacturer and Product Information
View version information for contacting Helmer.
1 Touch i.C³ APPS, Contact Helmer.
2 Manufacturer contact information appears.
3 Software version appears.
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8 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.
8.1 Recharge Refrigerant
CAUTION ► Review all safety instructions prior to recharging refrigerant. Refer to Section I, Item
2 (Safety).
► Maintenance should only be performed by trained refrigeration technicians.
NOTE Use only non-CFC R-134A refrigerant.
Full initial refrigerant charge varies by model and power requirements, which can be found on the product
specication label.
i.Series® Models
Model
111 model (single door) 115 V, 60 Hz
120 and 125 models (single-door) 115 V, 60 Hz
245 and 256 models (double-door) 115 V, 60 Hz
Power
Requirements
230 V, 50 Hz
230 V, 60 Hz
230 V, 50 Hz
230 V, 60 Hz
230 V, 50 Hz
230 V, 60 Hz
Initial Charge
7.5 oz. (213 g)
10.1 oz. (286 g)
12.5 oz. (354 g)
Obtain:
► Refrigerant
► Calibrated pressure gauge (0 psi to 25 psi (0 kPa to 175 kPa))
Add refrigerant:
1 Attach pressure gauge to the ttings on the refrigeration lines.
2 Monitor the low side (suction) pressure through a full compressor cycle.
3 Measure the pressure at the end of the next cycle, immediately before the compressor stops.
NOTE Pressure varies depending on ambient air temperature.
4 Add refrigerant so the low side pressure is within acceptable range (16 psi to 18 psi (110 kPa to 125
kPa)).
5 Remove pressure gauge.
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8.2 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.
Check the battery:
1 Switch AC ON/OFF switch OFF.
► Screen should continue to display information with reduced brightness.
► Battery icon will appear on the screen.
► If the display is blank, replace battery.
2 Switch AC ON/OFF switch ON.
NOTE Use a battery which meets manufacturer’s specications outlined i.
8.3 Check Optional Access Control System Battery
During an AC power failure, the Access Control backup battery provides backup power to power the
magnetic Access Control lock. Test the Access Control backup battery to ensure it is working properly.
Check the battery:
1 Ensure monitoring system / Access Control battery key switch is switched ON.
2 Switch AC ON/OFF switch OFF.
3 Attempt to open the cabinet door.
► If the door remains locked, the battery is functional.
► If the door does not remain locked, replace the battery.
4 Switch AC ON/OFF switch ON.
i.Series® Models
8.4 Replace LED Lamps 1 Switch battery switch OFF. Switch AC ON/OFF switch OFF. 2 Using a screwdriver, remove lamp strip from chamber wall. 3 Unsnap the defective LED and disconnect wires. 4 Snap new LED onto the lamp strip. 5 Connect the wires. 6 Using a screwdriver, attach lamp strip to chamber wall. 7 Switch AC ON/OFF switch ON. Switch battery switch ON. 8 Touch Light button or open door to test lamp. 9 Touch Mute to disable the high temperature alarm while refrigerator reaches operating temperature.
8.5 Clean the Refrigerator
8.5.1 Condenser Grill
CAUTION Disconnect refrigerator from AC power when cleaning.
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.
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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.
8.5.4 Door Gaskets
Clean with soft cloth and mild soap and water solution.
8.5.5 CleanandRellProbeBottles
Obtain:
► Fresh water-bleach solution (not provided)
► 1:9 ratio of bleach to water
► Bleach is 5% solution of commercial sodium hypochlorite (NaOCl)
► Equivalent oxidizing cleaner/disinfectant approved by your organization may be substituted
► 4 oz. (120 mL) of product simulation solution per bottle
► 10:1 ratio of water to glycerin
i.Series® Models
Cleanandrellbottles:
1 Remove all probes from bottle.
2 Remove bottle from bracket.
3 Clean bottle with water-bleach solution.
4 Fill bottle with 4 oz. (120 mL) of product simulation solution.
5 Cap bottle tightly to minimize evaporation.
6 Place bottle in bracket.
7 Replace probes, immersing at least 2” (50 mm).
8.5.6 i.C³
Clean touchscreen with a soft, dry cotton cloth.
Touchscreen
®
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8.6 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” socket wrench
► Tool to push putty away from the drain hose
A
B
C
Drain line and hose.
i.Series® Models
Label Description
A Unit cooler cover
B Drain port
C Drain hose
8.6.1 Remove the Unit Cooler Cover 1 Switch AC ON/OFF switch OFF. Switch battery switch OFF. 2 Remove top drawer, basket, or shelf from the chamber. 3 On the back of cabinet, peel putty back to expose drain hose (C).
CAUTION The condensate evaporator and water evaporation tray are hot.
4 Remove drain hose from unit cooler drain port (B).
a Pull drain hose downward to separate from unit cooler.
b Twist drain hose while pulling to assist in removal.
5 Push the drain hose (C) out through rear of chamber.
6 Remove the unit cooler cover.
a Hold unit cooler cover in place to prevent it from dropping.
b Use the socket wrench to remove four screws securing the unit cooler cover.
c Carefully lower unit cooler cover to avoid damage to the fan wiring.
8.6.2 Install the Unit Cooler Cover 1 Verify unit cooler wiring is connected and routed correctly.
a Wiring should be routed above copper tube inside the unit cooler.
b Reconnect wires if they have separated.
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i.Series® Models
2 Attach unit cooler cover.
a Lift unit cooler cover into place.
b Front edge of the cover should be behind the unit cooler case.
c Use the socket wrench to install four screws to secure the unit cooler cover.
3 Insert the drain hose through hole in the refrigerator.
a Push drain hose upward, toward the unit cooler drain port.
b In the chamber, push drain hose onto unit cooler drain port.
4 Reinstall top drawer, basket, or shelf if previously removed.
5 On the back of the chamber, press putty around the drain hose.
6 Switch AC ON/OFF switch ON. Switch battery switch ON.
7 Touch Mute to disable the high temperature alarm while refrigerator reaches operating temperature.
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9 Troubleshooting
!
CAUTION Review all safety instructions prior to troubleshooting. Refer to Section I, Item 2 (Safety).
9.1 General Operation Problems
Problem Possible Cause Action
A drawer or basket
does not slide easily.
A door does not open
easily.
The monitor display is
hard to read.
The alarm monitor is
not responding.
The chamber
temperature meets
an alarm condition,
but the appropriate
temperature alarm is
not active.
The chamber
temperature displayed
is higher or lower
than the actual
temperature.
“Probe Failure” is
displayed on the
monitor.
Drawer slide is faulty. ► Conrm the slide is operating correctly. Replace if
Debris in the drawer
slides.
Drawer slides are not
lubricated.
Drawer or basket is
misaligned or not
level.
Debris in the hinges. ► Conrm the hinges are free of debris. Clean the
Door hinges are not
lubricated.
Hinge cam is faulty. ► Conrm the hinge cam is not damaged. Replace
Screen brightness is
set too low.
Digital electronics are
locked because of an
interruption in power.
Temperature alarm
setpoint was changed.
Probe bottles are
empty, or the amount
of solution is too low.
Monitor is not
calibrated.
Digital electronics are
locked because of an
interruption in power.
A component is
faulty or internal
connections are loose.
Temperature probe
wiring is an open
circuit.
i.Series® Models
necessary.
► Pull the drawer or basket out and conrm the
slides are free of debris. Clean the slides if
necessary.
► Using a lightweight oil, lubricate the bearings in the
slides.
► Conrm both slides for the drawer or basket are
mounted at the same height.
hinges if necessary.
► Using a general-purpose grease, lubricate the
pivots in the hinges.
the cam if necessary.
► Change the screen brightness.
► Reset the monitoring system.
► Check the current setpoints for the temperature
alarms. Change the setpoints if necessary.
► Check the level of product simulation solution in
the bottles. Rell the bottles if necessary.
► Conrm the upper monitor probe is reading
correctly. Calibrate the probe if necessary.
► Reset the monitoring system.
► Contact Helmer Technical Service.
► Check the continuity of the probe wiring and
connections. Secure the connections if necessary.
► Conrm the probe is providing resistance in the
range of 86 Ω to 110 Ω. Replace the probe if
necessary.
360127-D/D 33
Page 35
9.2 Chamber Temperature Problems
Problem Possible Cause Action
The chamber
temperature displayed
is higher or lower
than the actual
temperature.
Monitor probe(s) is not
calibrated.
Connections for the
monitor probe are
loose.
Monitor probe wiring
is an open circuit.
Probe bottles are
empty, or the amount
of solution is too low.
The chamber
temperature does
not stabilize at the
refrigerator setpoint.
Compressor starting
relay is faulty.
Temperature monitor/
controller board is
faulty.
Condensing unit fan is
not running.
Unit cooler fan is not
running.
Compressor motor
has seized.
Control probe is out of
calibration.
Control probe is faulty. ► Conrm the probe is providing resistance in the
A component is
faulty or internal
connections are loose.
Refrigerant level is too
low.
Air circulation at the
top of the chamber is
not adequate.
Ambient air
temperature around
the refrigerator is too
high.
Condenser grill is
dirty.
i.Series® Models
► Check the chamber temperature calibration.
Change the calibration if necessary.
► Test the probe connections. Secure the
connections if necessary.
► Check the continuity of the probe wiring. Replace
the probe if necessary.
► Check the level of product simulation solution in
the bottles. Rell the bottles if necessary. Refer to
the Refrigerator operation manual.
► Conrm the relay is operating correctly. Replace
the relay if necessary.
► Replace parts with those included in the control
board kit, or replace the monitor/control board.
► Check the condensing unit fan connections.
Replace the fan motor if necessary.
► Check the voltage to the fan when door switch is
activated. Replace the fan motor or door switch if
necessary.
► Replace the compressor.
► Conrm the probe is providing accurate
temperature readings.
range of 98 Ω to 110 Ω. Replace the probe if
necessary.
► Contact Helmer Technical Service.
► Check the refrigeration lines for leaks and repair
them if necessary. Check the refrigerant level.
Recharge the refrigerant if necessary.
► Check if there are any items that may obstruct air
ow and remove them if necessary.
► Conrm the refrigerator is placed appropriately.
► Check the condenser grill. Clean the grill if
necessary.
360127-D/D 34
Page 36
Problem Possible Cause Action
The compressor runs
continuously.
Refrigerator setpoint
is set too low.
Control probe is out of
calibration.
Control probe is faulty. ► Conrm the probe is providing resistance in the
Temperature monitor/
controller board is
faulty.
Compressor starting
relay is faulty.
Temperature monitor/
controller board is
faulty.
9.3 Alarm Activation Problems
Problem Possible Cause Action
The refrigerator is in
Alarm system is faulty. ► Replace parts with those included in the control
an alarm condition,
but alarms are not
audible.
Temperature monitor/
controller board is
faulty.
Alarm speaker is
faulty.
Audible alarms have
been muted.
A component is
faulty or internal
connections are loose.
The refrigerator meets
an alarm condition,
but the appropriate
alarm is not active.
Temperature monitor/
controller board is
faulty.
Alarm setpoint was
changed.
A component is
faulty or internal
connections are loose.
i.Series® Models
► Conrm the setpoint is set within the operating
range and change it if necessary.
► Conrm the probe is providing accurate
temperature readings.
range of 98 Ω to 110 Ω. Replace the probe if
necessary.
► Replace parts with those included in the control
board kit, or replace the monitor/control board.
► Conrm the relay is operating correctly. Replace
the relay if necessary.
► Replace parts with those included in the control
board kit, or replace the monitor/control board.
board kit, or replace the monitor/control board.
► Replace parts with those included in the control
board kit, or replace the monitor/control board.
► Replace the speaker.
► Verify audible alarms are not muted. Touch
the Mute button repeatedly until the Mute timer
indicates no time delay.
► Contact Helmer Technical Service.
► Replace parts with those included in the control
board kit, or replace the monitor/control board.
► Check the current setpoints for the alarms.
Change the setpoints if necessary.
► Contact Helmer Technical Service.
360127-D/D 35
Page 37
Problem Possible Cause Action
The High Temperature
alarm activates when
the door is opened,
then clears shortly
after the door is
closed.
Connections for the
monitor probe are
loose.
Monitor probe is faulty. ► Test the probe. Replace the probe if necessary.
Unit cooler fan
continues to run while
the door is open.
Probe bottles are
empty.
High temperature
alarm setpoint is set
too low.
A component is
faulty or internal
connections are loose.
The refrigerator is
connected to power,
but the AC Power
Outlet connection is
faulty.
Power cord is faulty. ► Conrm the power cord is connected securely.
Failure alarm is active.
ON/OFF AC power
switch located inside
the front lower panel
is faulty.
ON/OFF AC power
switch is OFF.
A component is
faulty or internal
connections are loose.
A component is
faulty or internal
connections are loose.
Circuit breaker is
tripped.
i.Series® Models
► Check the probe connections. Secure the
connections if necessary.
► Test the door switch and unit cooler fan
connections. Secure the connections if necessary.
Replace the door switch or fan motor if necessary.
► Check level of product simulation solution in the
bottles. Rell bottles if necessary.
► Check the setpoint. Change the setpoint if
necessary.
► Contact Helmer Technical Service.
► Verify power at the outlet. Repair the original
outlet or connect to a different outlet if necessary.
Secure the power cord if necessary.
► Replace the ON/OFF AC power switch.
► Turn the ON/OFF AC power switch to the ON
position.
► Contact Helmer Technical Service.
► Contact Helmer Technical Service.
► Reset or replace the circuit breaker.
360127-D/D 36
Page 38
Problem Possible Cause Action
The Door Open
alarm is activating
sporadically.
Doors are not closing
completely.
Doors are closing but
not sealing completely.
Connections for the
door switch are faulty.
One or both door
switches are faulty.
Temperature monitor/
controller board is
faulty.
Door Open Timeout
is set to zero, causing
the alarm to activate
immediately when the
door is opened.
All alarms are
Alarm system is faulty. ► Replace parts with those included in the control
activating sporadically.
Temperature monitor/
controller board is
faulty.
A component is
faulty or internal
connections are loose.
The condenser alarm
is active.
Refrigerant level is too
low.
Connections for
the condenser
temperature probe are
loose.
Condenser
temperature probe is
faulty.
Condenser ns are
dirty.
Compressor is
overheating due to a
lack of air ow.
Condenser probe is
not calibrated.
Condenser alarm
setpoint is too low.
Condenser fan motor
is faulty.
A component is
faulty or internal
connections are loose.
i.Series® Models
► Conrm the hinge cams are not damaged.
Replace the cams if necessary.
► Conrm the door gasket seals completely.
Replace the door gasket if necessary.
► Test the switch connections. Secure the
connections if necessary.
► Replace the door switch or switches.
► Replace parts with those included in the control
board kit, or replace the monitor/control board.
► Check the time delay for the Door Open alarm.
Change the time delay if necessary.
board kit, or replace the monitor/control board.
► Replace parts with those included in the control
board kit, or replace the monitor/control board.
► Contact Helmer Technical Service.
► Check refrigeration lines for leaks and repair if
necessary. Check refrigerant level. Recharge if
low.
► Test the probe connections. Secure the
connections if necessary.
► Test the probe. Replace the probe if necessary.
► Clean as necessary, or order new ones from
Helmer or your distributor.
► Check the condenser grill and clean if necessary.
► Conrm the refrigerator is correctly located. Refer
to the operation manual.
► Conrm the condenser probe is reading correctly.
Calibrate the probe if necessary.
► Conrm the alarm setpoint is at the appropriate
value.
► Replace the condenser fan motor.
► Contact Helmer Technical Service.
360127-D/D 37
Page 39
Problem Possible Cause Action
An alarm is activated
but the temperature
recorded at activation
does not match the
alarm setpoint.
The No Battery
alarm is activating
sporadically.
9.4 Testing Problems
Problem Possible Cause Action
The automatic
temperature tests do
not work.
Temperature monitor
is not calibrated.
Temperature changed
slightly around the
time of activation.
Battery voltage level
on the backup battery
for the monitoring
system is low.
Connections for the
upper monitor probe
are loose.
Upper monitor probe
is out of calibration.
Upper monitor probe
is faulty.
Temperature monitor/
controller board is
faulty.
High Alarm setpoint
is set signicantly
higher than the default
value, or the Low
Alarm setpoint is set
signicantly lower
than the default value.
i.Series® Models
► Conrm the upper monitor probe is reading
correctly. Calibrate the probe if necessary.
► No action necessary.
► Replace the battery for the monitoring system.
► Test the probe connections. Secure the
connections if necessary.
► Conrm the probe is providing accurate
temperature readings.
► Conrm the probe is reading correctly. Calibrate
the probe if necessary.
► Conrm the probe is providing resistance in the
range of 98 Ω to 110 Ω. Replace the probe if
necessary.
► Replace parts with those included in the control
board kit, or replace the monitor/control board.
► Conrm the alarm setpoints are set at the
appropriate values.
► Test the temperature alarms manually.
9.5 Condensation Problems
Problem Possible Cause Action
There is excessive
water in the water
evaporation tray.
Heater in the
evaporation tray is
faulty.
► Conrm the heater is hot and is drawing the
appropriate current.
► For 115 V refrigerators, the current should be
approximately 0.43 A to 0.55 A.
► For 230 V refrigerators, the current should be
approximately 0.21 A to 0.35 A.
Humid air is entering
the chamber.
► Conrm the refrigerator is level, and the doors
are aligned, closing tightly, and sealing correctly.
Correct issues as necessary.
360127-D/D 38
Page 40
Problem Possible Cause Action
There is excessive
water in the chamber.
Humid air is entering
the chamber.
Connection between
the unit cooler and the
drain tube is loose.
Temperature monitor/
controller board is
faulty.
Drain line is plugged. ► Conrm the drain tube is free of debris. Remove
There is excessive
humidity on the doors.
Humid air is entering
the chamber.
Relative humidity
around the refrigerator
is too high.
Water leaks from
the bottom of the
refrigerator.
Humid air is entering
the chamber.
Excessive water
is found in the
evaporation tray
inside the refrigerator.
i.Series® Models
► Conrm the refrigerator is level, and the doors
are aligned, closing tightly, and sealing correctly.
Correct issues as necessary.
► Conrm the connection is secure. Tighten the
connection if necessary.
► Replace parts with those included in the control
board kit, or replace the monitor/control board.
debris if necessary.
► Conrm the refrigerator is level, and the doors
are aligned, closing tightly, and sealing correctly.
Correct issues as necessary.
► Conrm the refrigerator is placed properly. Refer
to the refrigerator operation manual.
► Conrm the refrigerator is level, and the door is
aligned, closing tightly, and sealing correctly.
► Contact Helmer Technical Service to correct issues
as necessary.
360127-D/D 39
Page 41
10 Parts
NOTE ► Before replacing parts, protect items in refrigerator from extended exposure to
10.1 Front
A B C D E F G H I
i.Series® Models
adverse temperature.
► Allow refrigerator temperature to stabilize at setpoint after replacing parts or after
extended door opening.
J
Left: iB120 refrigerator. Center: iB111 refrigerator.
Top-right: Chart recorder and door (except 111 model).
Bottom-right: 111 model chart recorder and door.
Label Description PartNumber
A Temperature chart recorder (standard on
blood bank models except iB111; optional
on laboratory and pharmacy models
except iLR111 and iPR111)
B i.C³ monitoring and control system Refer to subsequent section(s) for
C Bezel (all models except 111) With chart recorder door: 400999-1
D Temperature chart recorder (standard
on iB111 model; optional on iLR111 and
iPR111 model)
E Bezel (111 model) With chart recorder door: 800056-1
F Chart recorder door assembly (111 model) 320739-1 -
G Chart recorder door assembly (all models
except 111)
H Chart paper (52 sheets) 220366 -
120 V: 800026-1
230 V: 800026-2
part numbers
Without chart recorder door: 400998-1
120 V: 800025-1
230 V: 800025-2
Without chart recorder door: 800055-1
800070-1 -
Schematic
Label
CA
-
-
CA
-
360127-D/D 40
Page 42
i.Series® Models
Label Description PartNumber
I Chart recorder battery 120218 CC
J Caster (swivel with brake) 220467 -
10.1.1 Access Control Option
A
B
Access Control features (iB125 model shown).
Label Description PartNumber
A Magnetic lock 800138-1 AXb
B Backup battery key switch 401220-1 AXa
Schematic
Label
Schematic
Label
10.1.2 Control System and Display
Left: Front view, LCD touchscreen. Right: Rear view showing display board.
Label Description PartNumber
A Interface cable 800010-1 IG
B Power cable 800010-1 IH
C Display assembly (includes touchscreen,
display board, interface cable, speaker)
A
B
C
Schematic
Label
800041-1 (111 models)
IQ
800042-1 (120, 125, 245, 256 models)
360127-D/D 41
Page 43
NOTE ► The i.C³ display assembly is sensitive to static electricity and can be damaged by
10.2 Top
A B C D
Top features.
i.Series® Models
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 display assembly, Helmer recommends replacing the complete assembly.
Label Description PartNumber
Schematic
A Condenser probe 800039-1 IL
B 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
C Compressor 120 V
111 model: 800005-1
120 and 125 models: 800111-1
245 and 256 models: 800113-1 (for serial numbers
2000000 through 2002949)
245 and 256 models: 800113-5 (for serial numbers
2002950 and greater)
230 V / 50 Hz
111 model: 800005-2
120 and 125 models: 800111-2
245 and 256 models: 800113-2
230 V / 60 Hz
111 model: 800005-3
120 and 125 models: 800111-3
245 and 256 models: 800113-3
D Monitoring system battery
120628 IB
(supplies backup power
to optional Access Control
system)
Label
K
J
360127-D/D 42
Page 44
10.3 Rear
!
i.Series® Models
D
A
B
C
Rear features (iB111 model shown).
Label Description PartNumber
A Electrical box Refer to subsequent section(s) for
B Power cable North American models
C Condensate evaporator assembly
(includes condensate evaporator, tray, and
cover)
D Remote alarm contacts - -
E RJ-45 Ethernet port 800008-1 IF
F USB port 120633 IE
G RS-232 serial port (optional) - -
H Battery switch 120202 AC
I Main power switch 120478 C
J Circuit breaker (230 V models) Single-door models (6 A): 120429
E
F
G
H
I
J
part numbers.
120 V: 120630
230 V: 120631
European models
230 V: 120156
115 V
111 model: 400791-1
120, 125, 245, 256 models: 400790-1
230 V
111 model: 400791-2
120, 125, 245, 256 models: 400790-2
Double-door models (7 A): 120428
Schematic
Label
-
A
G
B
CAUTION Do not remove the cover from the condensate evaporator tray.
360127-D/D 43
Page 45
10.3.1 Electrical Box
!
i.Series® Models
A
B
C
Electrical box features (iPR125 model shown).
CAUTION Disconnect the refrigerator from AC power before opening the electrical box.
D
E
Label Description PartNumber
A Power supply board 800035-1 ID
B Compressor relay 120426 L
C Power line lter 120400 D
D i.C³ control board 8000034-1 IA
E Lighting power supply 120624 O
NOTE The i.C³ control board is sensitive to static electricity and can be damaged by electrostatic
discharge. Use proper ESD precautions when handling the board.
360127-D/D 44
Schematic
Label
Page 46
10.4 Interior
Interior features (iPR245 model shown).
i.Series® Models
F G H
A
B
C
I
D
E
Label Description PartNumber
Schematic
A Chart recorder probe 800024-1 CB
B Upper monitor probe 800038-1 IK
C Probe bottle and glycerin kit 400922-1 -
D Lower monitor probe (except 111 model) 800037-1 IJ
E Lamp assemblies Refer to subsequent section(s)
for part numbers.
F Unit cooler Refer to subsequent section(s)
for part numbers.
G Door switch 120380 M
H Door - -
I Storage parts Refer to subsequent section(s)
for part numbers.
Label
P
F
-
360127-D/D 45
Page 47
10.4.1 Lighting
!
CAUTION Disconnect refrigerator from power when replacing LED lamps.
Light features.
i.Series® Models
A
Label Description PartNumber
A LED lamp 800049-1 P
10.4.2 Unit Cooler
A B C
Left: Unit cooler (single-door model shown). Center and right: Unit cooler parts.
Label Description PartNumber
A Unit cooler assembly 115 V
B Unit cooler fan motor 115 V models: 120540
C Control probe (includes connector) 800048-1 IT
Schematic
Label
Schematic
Label
F
111 model: 120536
120 and 125 models: 120594
245 model: 120595
230 V
111 model: 120553
120 and 125 models: 120615
245 model: 120616
E
230 V models: 120560
360127-D/D 46
Page 48
10.4.3 Storage
Storage features (iPR245 model shown).
i.Series® Models
A
B
C
Label Description PartNumber
Not
Half shelf (includes hardware) 120, 125, 245, and 256 models: 400413-1
shown
A Full shelf (includes hardware) 111 model: 400414-3
120 and 245 models: 400414-1
125 and 256 models: 400414-2
B Roll out basket assembly (includes
basket, 2 slides, and hardware)
111 model: 400751-1
120 and 245 models: 400415-1
125 and 256 models: 400415-2
C Drawer assembly (includes drawer, 2
slides, and hardware)
111 model with glass door: 400752-1
120 and 245 models with glass doors: 400370-1
125 and 256 models with glass doors: 400370-2
111 model with solid door: 400752-2
120 and 245 models with solid doors: 400370-3
125 and 256 models with solid doors: 400370-4
Not
shown
Slide assembly (includes 2 slides) 111 model: 400753-1
120 and 245 models: 400714-1
125 and 256 models: 400714-2
Bridge shelf 18” depth: 400845-1
24” depth: 400845-2
Pole mast for chromatography (iLR model
400478-1
with chromatography option)
360127-D/D 47
Page 49
10.4.4 Door and Hinge
A
B
Door and hinge features (iLR120 model shown).
i.Series® Models
C
D
E
F
G
H
I
J
Label Description PartNumber
A Door lock 220540
B Door handle pad 320684-1
C Upper hinge assembly (includes pin and
bracket)
Left hinge: 400960-2
Right hinge: 400960-1
D Upper hinge bearing 220541
E Door gasket 111 model: 321082-1
120, 125, 245, and 456 models: 320726-1
F Lower hinge cam (quantity 2) 320742-1
G Lower hinge bearing 220375
H Door stop 320763-1
I Ground strap 120688
J Lower hinge bracket Right hinge: 400377-1
Left hinge: 400377-2
360127-D/D 48
Page 50
11 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
(A)
POWER CORD
Double Door
(F)
UNIT COOLER
i.Series® Models
L2 IN
(D)
RFI Filter
L2 OUT
GND
(B)
CIRCUIT
BREAKERS
*230V~ ONLY
(C)
MAIN
POWER
SWITCH
L1 IN
L1 OUT
L1 TERMINAL STRIPL2/NEUTRAL TERMINAL STRIP
1
Solid State Relay #1
2
Interior Light Power Supply
3
i.C3 Power PCBA
4
5
i.C3, J18, Pin 9
6
7
8
9
10
11
i.C3, J18, Pin 2
12
1
COMPRESSOR
2
Interior Light Power Supply
3
4
i.C3 Power PCBA
5
6
7
8
9
10
11
12
(E)
UNIT COOLER FANS
Left Door
Heater
*Option
(iS)
Right Door
Heater
*Option
(iR)
(G)
Condensate
Evaporator
GROUND TERMINAL
356
1 2
COMPRESSOR
JUNCTION BOX
SNUBBER
CIRCUIT
7
(iR)
9
From
i.C3, J18, Pin 4
8 9
7
4
DC POWER SUPPLY
Door Heater
Door Heater
4
(iS)
Pass Thru
Non-Control Side
Heater
*Option
8
Pass Thru
Control Side
Heater
*Option
10
10
Door Heater
Door Heater
From
i.C3, J18, Pin 5
360127-D/D 49
Page 51
To Unit Cooler Fan
To Door Heater(s)
To Condensate Evaporator
Double Door/Pass Thru
Reset
(iQ)
Bezel Mount
Components
i.Series® Models
Speaker
(iE)
USB Port
Double Door/
Pass Thru
Models Only
COM N.O.COM N.O.
(M)
DOOR
SWITCH(s)
COM
NC
NO
EXTERIOR
ALARM
CONTACTS
USB Port
*Option
COM N.O.
COM N.O.
LCD Touch Screen
(iG)
USB Data Cable
RS232
USB Port 3
USB Port 4
(iM)
SD Memory Card
Ethernet Port
(iA)
i.C3 Control PCBA
L1-5
i.C3 Display PCBA
(iF)
3+
3-28VDC
2
(iH)
Power Cable
4-
COMPRESSOR
1
L1-2
USB Host
LCD Back Light
To LCD
(iT)
Chamber Temp Probe
(iK)
Upper Monitor
Water Bottle Probe
(iJ)
Lower Monitor
Lower Chamber Probe
20, 25, 45, 56FT3 Models Only
(iL)
Condensor
Discharge Probe
(J)
COMPRESSOR
L2-2
(L)
SSR
3
Control
Battery
BYPASS ON
(iC)
BATTERY
SWITCH
*STANDARD
-
12V
(iB)
MONITOR
BATTERY
BACKUP
Double Door Only
-
+
+
L1-3
L2-3
(K)
CONDENSING UNIT
FAN MOTOR
i.C3 LCD
w/ Touch Screen
F4
(iD)
i.C3 Power PCBA
BATTERY KEY SWITCH
*ACCESS CONTROL OPTION
+
RECORDER
(AXb)
Magnetic Lock
Access Control
*Option
(O)
Lighting Power Supply
(AXa)
(CC)
CHART
BATTERY
BACKUP
N/L2
5
L1
L1-4
L2-4
(CA)
CHART
RECORDER
*Option
-
+
(CB)
9V
+
CHART
RECORDER
PROBE
(P)
INTERIOR LIGHT
Only
360127-D/D 50
Page 52
Section III: Horizon Series™ Models
!
12 ProductConguration
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.
► The monitoring system will start on battery power alone. If the refrigerator was
previously not connected to AC power and the battery is connected, the monitoring
system will begin running on battery power.
Battery life varies by manufacturer as well as voltage level remaining. Providing full power is available,
and no battery-related alarms are active, backup power for the monitoring system is available for up to two
hours. Providing full power is available, backup power for the optional Access Control system is available
for up to 2.5 hours.
CAUTION ► Before installing or replacing batteries, switch the power OFF. Disconnect the
refrigerator from AC power.
Horizon Series™ Models
The monitoring system and optional Access Control batteries are located on the top of the refrigerator.
For 111 models, a removable panel provides access to the batteries.
Monitoring system backup battery. Optional Access Control backup battery.
Monitoring system battery is included in the literature box. Install and connect the battery to provide
monitoring system with backup power in the event of AC power failure. Switch the Access Control backup
battery ON to provide the optional Access Control system with backup power in the event of an AC power
failure.
360127-D/D 51
Page 53
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.
Requirements for your alarm system determine which alarm wires must connect to terminals.
CAUTION ► The interface on the remote alarm monitoring system is intended for connection to
the end user’s central alarm system(s) that uses normally-open or normally-closed
dry contacts.
► If an external power supply exceeding 33 V (RMS) or 70 V (DC) is connected to the
remote alarm monitoring system’s circuit, the remote alarm will not function properly;
may be damaged; or may result in injury to the user.
The terminals on the remote alarm interface have the following maximum load capacity:
► 0.5 A at 125 V (AC): 1 A at 250 V (DC)
12.2.1 Connect to Remote Alarm Interface 1 Switch AC ON/OFF switch OFF. Disconnect the battery. 2 On the electrical box, locate the remote alarm terminals. 3 Connect remote alarm wires to appropriate terminals, according to requirements for your alarm
system.
4 Use a cable tie to relieve strain on alarm wires (as necessary).
5 Switch AC ON/OFF switch ON. Reconnect the battery.
6 Press the Mute button to disable the high temperature alarm while refrigerator reaches operating
temperature.
Horizon Series™ Models
12.3 Move Drawers, Shelves, and Baskets
Storage features.
360127-D/D 52
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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.
Remove a drawer or basket
1 Pull drawer or basket out until it stops.
2 Tilt the front of the drawer or basket upward.
3 Pull drawer or basket free of the slides.
Install a drawer or basket
1 Align end guides on drawer or basket with the slides.
2 Gently push drawer or basket into chamber until it stops.
3 Pull drawer or basket out until it stops; check for smooth operation.
Remove a shelf
1 With one hand, lift front edge of the shelf from the front brackets.
2 With the other hand, reach under the shelf and bump rear edge of the shelf upward to disengage rear
brackets.
Install a shelf
1 Insert shelf into chamber, placing it on brackets.
2 Gently bump rear edge of the shelf downward to engage brackets.
3 Pulling shelf forward gently; shelf should not disengage from rear brackets.
12.4 Move Slides and Brackets
Remove drawer slides
1 Using a screwdriver, remove front bracket retainers.
2 Tap front brackets upward to disengage standards.
3 Remove slides from standards.
Install drawer slides
1 Insert slides into standard at appropriate height.
2 Tap front brackets downward to engage standards.
3 Using a screwdriver, install front bracket retainers.
Remove shelf brackets
1 Using a screwdriver, remove front bracket retainers.
2 Tap front brackets upward to disengage standards.
3 Remove front brackets from standards.
Install shelf brackets
1 Insert front brackets into standard at appropriate height.
2 Tap front brackets downward to engage standards.
3 Using a screwdriver, install front bracket retainers.
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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
1 Using a wrench, raise or lower leveling feet.
2 When refrigerator is properly leveled, bottom of the unit cooler will slope downward from front to back
(toward the condensate drain line).
Side-to-side
1 Using a wrench, raise or lower leveling feet.
2 When refrigerator is properly leveled, bottom of the unit cooler will be horizontal (parallel to the oor).
12.6 Optional Adapter Kits for Medication Dispensing Locks
Contact Helmer Technical Service or your distributor for service documentation pertaining to medication
dispensing locks.
Horizon Series™ Models
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13 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. Do not change
settings unless instructed in product documentation or by Helmer Technical Service.
13.1 Monitor and Control Interface
Horizon Series™ Models
A
J
B
C
D
E
F
K
G
L
H
I
M
N
Label Description Function
A COOL lamp Indicates the compressor is running.
B LED Display Displays real-time and stored temperature information, setpoints, and alarms.
C HIGH TEMP lamp Indicates when the refrigerator is in a high temperature alarm condition.
D LOW TEMP lamp Indicates when the refrigerator is in a low temperature alarm condition.
E DOOR ALARM lamp Indicates when the door is open.
F UP ARROW button Increases a temperature setting.
G DOWN ARROW button Decreases a temperature setting. Also mutes the audible alarm for 5 minutes.
H SEL button Toggles between alarm monitor and control modes.
I ALARM DISABLE key
switch
J SET lamp Indicates when temperature setpoint or alarm setpoint is being changed.
K SET button Allows settings to be selected, prior to changing settings.
L CONTROL lamp Indicates when the reading from the control probe is displayed.
M MONITOR lamp Indicates when the display is showing temperature readings from the monitor probe. Also
N LIGHT switch Turns the chamber light on or off.
Also indicates the high alarm temperature setpoint is being changed.
Also indicates the low alarm temperature setpoint is being changed.
Disables all audible alarms. Does not affect alarm lamps or signals sent through the
remote alarm interface.
indicates when alarm setpoints are being changed.
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13.2 Display Minimum and Maximum Monitor Temperature Recordings
Horizon Series™ Models
NOTE
► This feature is standard on Horizon Series™ models with serial numbers of 2015494
or higher. Some exceptions may exist. For conrmation 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.
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.
NOTE The following steps only apply to the monitor probe.
1 View minimum temperature recording.
a Press and hold the Down Arrow button for 1 second and listen for a single beep.
b The display will alternate between LO and a valid temperature value ve (5) times followed by a
single beep to indicate exit back to the temperature display.
2 View maximum temperature recording.
a Press and hold the Up Arrow button for 1 second and listen for a single beep.
b The display will alternate between HI and a valid temperature value ve (5) times followed by a
single beep to indicate exit back to the temperature display.
3 View recorded temperature timer.
NOTE
► The timer denotes the period of time that has elapsed. It does not display the time at
which a minimum or maximum temperature occurred.
► The maximum period of time the timer can record is 99:59 (99 hours and 59 minutes).
a Press and hold either the Up or Down Arrow button for 1 second.
b While the display is ashing the HI or LO value, press and hold the SET button for 1 second.
c The display will alternate ve (5) times between CLr and a value representing the number of
hours and minutes that have elapsed since the last recording (example: 12:47 would represent 12
hours and 47 minutes). A single beep will follow to indicate exit back to temperature display.
4 Clear minimum and maximum temperature recordings.
a Press and hold either the Up or Down Arrow button for 1 second.
b While the display is ashing the HI or LO value, press and hold the SET button for 1 second and
listen for a single beep.
c While the display is ashing the elapsed time since last reset, press and hold the SET button
for 2 seconds. CLr will be displayed followed by a series of 3 beeps to indicate exit back to the
temperature display.
NOTE The minimum and maximum temperature and timer will reset when:
► the unit is powered off and battery backup is not engaged, or
► after 99 hours and 59 minutes have elapsed.
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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:
1 On the monitoring system, press and release SEL to change to Control mode. The CONTROL lamp
will illuminate.
2 Press and hold SET to display the current temperature setpoint.
NOTE The current temperature setpoint is typically higher than the chamber temperature.
3 Hold SET and press Up or Down Arrow as necessary to set the desired value.
4 Release SET button. The new setting is saved.
5 Press and release SEL to return to Monitor mode. The MONITOR lamp will illuminate.
13.4 Table of Parameters
Parameter Visual Indicator Range Default
Celsius or Fahrenheit TEMPERATURE UNITS, LED display .C, .F .C
High Temperature MONITOR Lamp &
HIGH Lamp
Low Temperature MONITOR Lamp &
LOW Lamp
Monitor Offset MONITOR Lamp only -10.0 to 10.0 (°C)
Control Offset CONTROL Lamp only -10.0 to 10.0 (°C)
Hysteresis CONTROL Lamp only 0.5 to 2.5 (°C)
-40.0 to 25.0 (°C)
-40 to 77 (°F)
-40.0 to 25.0 (°C)
-40 to 77 (°F)
-18 to 18 (°F)
-18 to 18 (°F)
1 to 5 (°F)
Horizon Series™ Models
5.5 °C
1.5 °C (HB); 2.0 °C (HLR & HPR)
Varies
Varies
2.0 °C (HB111)
0.8 °C (HLR111 and HPR111)
1.0 °C (120, 125)
1.5 °C (245, 256)
NOTE Contact Helmer Technical Service for setting Hysteresis values.
13.4.1 View Alarm Setpoints and Offset Values 1 Press and hold the Up and Down Arrows simultaneously for 3 seconds to enter program mode. 2 The LED Display will show .C or .F to indicate Celsius or Fahrenheit. 3 Press and release SEL to scroll through the parameters and view settings. 4 Hold Up and Down Arrows simultaneously for 3 seconds to exit program mode. 5 The LED Display will show current monitor temperature.
13.4.2 Temperature Units
NOTE If temperature units are changed, the temperature setpoints, offsets and alarm settings
must be recalibrated.
1 Press and hold the Up and Down Arrows simultaneously for 3 seconds to enter program mode.
2 The LED Display will show .C or .F to indicate Celsius or Fahrenheit.
3 Press and hold the SET button while pressing the Up or Down Arrow to select the desired
temperature unit parameter.
4 Release SET button. The new setting is saved.
5 Press and hold Up and Down Arrows simultaneously for 3 seconds to exit program mode.
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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:
1 Press and hold the Up and Down Arrows simultaneously for 3 seconds to enter program mode.
2 The LED Display will show .C or .F to indicate Celsius or Fahrenheit.
3 Press SEL until HIGH TEMP and MONITOR lamps ash.
4 Hold SET, then press Up or Down Arrow to change the setpoint.
5 Release SET button. The new setting is saved.
6 Press and hold Up and Down Arrows simultaneously for 3 seconds to exit program mode.
13.5.2 Low Temperature Alarm
Change the alarm setpoint:
1 Press and hold the Up and Down Arrows simultaneously for 3 seconds to enter program mode.
2 The LED Display will show .C or .F to indicate Celsius or Fahrenheit.
3 Press SEL until LOW TEMP and MONITOR lamps ash.
4 Hold SET, then press Up or Down Arrow to change the setpoint.
5 Release SET button. The new setting is saved.
6 Press and hold Up and Down Arrows simultaneously for 3 seconds to exit program mode.
Horizon Series™ Models
13.6 Temperature Calibration Offsets
Temperature calibration offsets indicate an acceptable margin of error between the actual temperature
value and the desired temperature value.
13.6.1 Monitor Offset
► Value is factory-set using a calibrated reference thermometer.
NOTE ► The probe in the bottle is connected to the monitoring system and represents product
storage temperature. This probe does not affect refrigerator setpoint.
► Ensure the product simulation bottle is full of solution.
Obtain:
► Calibrated reference thermometer; independent and traceable per national standards.
► Tape or wire ties to attach thermometer to monitor probe.
Measure the chamber temperature:
1 Remove the monitor probe from the probe bottle and unscrew the cap.
2 Attach the thermometer to the probe, and immerse at least 2” (50 mm) in bottle.
3 Close the door and allow the chamber temperature to stabilize for 10 minutes.
4 Note the temperature on the calibrated reference thermometer and compare to the chamber
temperature displayed on the monitor.
5 Adjust the monitor offset value higher or lower to reect the difference between the chamber temperature
displayed on the monitor and the temperature reading from the calibrated reference thermometer.
6 Remove thermometer from the probe.
7 Replace bottle cap, ensuring a tight t.
8 Place probe in bottle, immersing at least 2” (50 mm).
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Enter the new offset value:
1 Press and hold the Up and Down Arrows simultaneously for 3 seconds to enter program mode.
2 The display will show .C or .F to indicate Celsius or Fahrenheit.
3 Press SEL until only the MONITOR lamp ashes.
4 Hold SET, then press Up or Down Arrow to change the monitor offset.
5 Release SET button. The new setting is saved.
6 Press and hold Up and Down Arrows simultaneously for 3 seconds to exit program mode.
13.6.2 Control Sensor Offset
► Adjust if monitor display is not showing the cabinet temperature at the setpoint ±0.3°C.
► Factory-preset. Varies for each refrigerator.
Determine control sensor offset:
NOTE ► Control Sensor Offset is factory-preset and should not be changed. Contact Helmer
Technical Service for instructions regarding changing the Control Sensor Offset.
► Steps in Item 13.5.1 must be performed to ensure the monitor display is calibrated and
accurate prior to adjusting the Control Sensor Offset.
1 View and record the Refrigerator Setpoint. (Reference Section III, Item 13.3)
2 Allow the unit to run with calibrated monitor temperature for several compressor cycles, and record
the average monitor temperature .
3 View and record the current Control Offset value.
4 Subtract the Refrigerator Setpoint from the average monitor temperature and record the difference.
5 Add the current Control Offset value to the recorded difference determined in the previous step to
establish the new Control Offset value.
Horizon Series™ Models
EXAMPLE 1 Refrigerator Setpoint is 4.0
Enter the new offset value:
1 Press and hold the Up and Down Arrows simultaneously for 3 seconds to enter program mode.
2 The Display will show .C or .F to indicate Celsius or Fahrenheit.
3 Press SEL until only the CONTROL lamp ashes.
NOTE ► Ensure Control Sensor Offset is being changed, and not Hysteresis.
4 Hold SET, then press Up or Down Arrow to change the setpoint.
5 Release SET button. The new setting is saved.
6 Press and hold Up and Down Arrows simultaneously for 3 seconds to exit program mode.
13.6.3 Hysteresis
► Allowable temperature variance on each side of the refrigerator setpoint.
NOTE Hysteresis is factory-preset and should not be changed. Contact Helmer Technical
2 Average monitor temperature is 5.2
3 Current Control Offset is 0.3
4 Subtract: 5.2 - 4.0 = 1.2; difference between average temperature and setpoint
5 Add 0.3 + 1.2 = 1.5; new Control Offset value
► Control Sensor Offset and Hysteresis have the same visual indicator.
Service for instructions regarding changing the Hysteresis value.
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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.
► Before testing alarms, protect items in the unit from extended exposure to adverse
temperature.
► Temperature probes are fragile; handle with care.
Obtain:
► (1) glass lled with 1/2 crushed ice and 1/2 water
► (1) 8 oz. (250 mL) glass of luke warm water
Test the low alarm:
1 Identify setting for low alarm setpoint.
2 Remove monitor probe from bottle.
3 Immerse probe in glass lled with water and crushed ice mixture.
4 When low temperature alarm sounds, note the temperature on the LED display.
Horizon Series™ Models
Test the high alarm:
1 Identify setting for high alarm setpoint.
2 Immerse probe in glass of luke warm water.
3 When high temperature alarm sounds, note the temperature on the LED display.
4 Remove probe from warm water.
5 Place monitor probe in probe bottle, immersing it at least 2” (50 mm).
13.7.2 Power Failure Alarm
NOTE During a power failure, the battery should continue to provide power to the monitoring
system.
1 Switch AC ON/OFF switch OFF. Audible power failure alarm will activate immediately and “PoFF”
(power off) will appear on the display.
2 Switch AC ON/OFF switch ON. Audible power failure alarm will cease and “PoFF” will clear from the
display.
13.7.3 Door Open Alarm
► Factory-set to three minutes.
► Value can not be changed.
Test the alarm:
1 Open refrigerator door and note the time.
2 After three minutes, audible alarm will activate and DOOR ALARM lamp will ash.
3 Close refrigerator door. Audible door open alarm will cease and DOOR ALARM lamp will stop
ashing.
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14 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.
14.1 Recharge Refrigerant
CAUTION ► Review all safety instructions prior to recharging refrigerant. Refer to Section I, Item
2 (Safety).
► Maintenance should only be performed by trained refrigeration technicians.
NOTE Use only non-CFC R-134A refrigerant.
Full initial refrigerant charge varies by model and power requirements, which can be found on the product
specication label.
Horizon Series™ Models
Model
Single-door models (111) 115 V, 60 Hz
Single-door models (120 and 125) 115 V, 60 Hz
Double-door models (245 and 256) 115 V, 60 Hz
Power
Requirements
230 V, 50 Hz
230 V, 60 Hz
230 V, 50 Hz
230 V, 60 Hz
230 V, 50 Hz
230 V, 60 Hz
Initial Charge
7.5 oz. (213 g)
10.1 oz. (286 g)
12.5 oz. (354 g)
Obtain:
► Refrigerant
► Calibrated pressure gauge (0 psi to 25 psi (0 kPa to 175 kPa))
Add refrigerant:
1 Attach pressure gauge to the ttings on the refrigeration lines.
2 Monitor the low side (suction) pressure through a full compressor cycle.
3 Measure the pressure at the end of the next cycle, immediately before the compressor stops.
NOTE Pressure varies depending on ambient air temperature.
4 Add refrigerant so the low side pressure is within acceptable range (16 psi to 18 psi (110 kPa to 125
kPa)).
5 Remove pressure gauge.
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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:
1 Switch the AC ON/OFF switch OFF.
a Display should continue to display information and the No Battery alarm should activate.
b If the display is blank, replace battery.
2 Switch AC ON/OFF switch ON.
NOTE Use a battery which meets manufacturer’s specications.
14.3 Check Optional Access Control System Battery
During an AC power failure, the Access Control backup battery provides backup power to power the
magnetic Access Control lock. Test the Access Control backup battery to ensure it is working properly.
Check the battery:
1 Ensure Access Control battery key switch is switched ON.
2 Switch AC ON/OFF switch OFF.
3 Verify “PoFF” (power failure) message is displayed.
4 Attempt to open the cabinet door.
► If the door remains locked, the battery is functional.
► If the door does not remain locked, replace the battery.
4 Switch AC ON/OFF switch ON.
Horizon Series™ Models
14.4 Replace LED Lamps 1 Switch AC ON/OFF switch OFF. Disconnect the battery. 2 Using a screwdriver, remove lamp strip from chamber wall. 3 Unsnap the defective LED and disconnect wires. 4 Snap new LED onto the lamp strip. 5 Connect the wires. 6 Using a screwdriver, attach lamp strip to chamber wall. 7 Switch AC ON/OFF switch ON. Reconnect the battery. 8 Press the Mute button to disable the high temperature alarm while refrigerator reaches operating
temperature.
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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.
14.5.2 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.
14.5.3 Interior
Clean painted surfaces with mild detergent. Clean stainless steel surfaces with a general-purpose
laboratory cleaner suitable for stainless steel.
Horizon Series™ Models
14.5.4 Door Gaskets
Clean with soft cloth and mild soap and water solution.
14.5.5 CleanandRellProbeBottle
Obtain:
► Fresh water-bleach solution (not provided)
► 1:9 ratio of bleach to water
► Bleach is 5% solution of commercial sodium hypochlorite (NaOCl)
► Equivalent oxidizing cleaner/disinfectant approved by your organization may be substituted
► 4 oz. (120 mL) of product simulation solution per bottle
► 10:1 ratio of water to glycerin
Cleanandrellbottle:
1 Remove all probes from bottle.
2 Remove bottle from bracket.
3 Clean bottle with water-bleach solution.
4 Fill bottle with 4 oz. (120 mL) of product simulation solution.
5 Cap bottle tightly to minimize evaporation.
6 Place bottle in bracket.
7 Replace probes, immersing at least 2” (50 mm).
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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” socket wrench
► Tool to push putty away from the drain hose
A
B
C
Drain line and hose.
Horizon Series™ Models
Label Description
A Unit cooler cover
B Drain port
C Drain hose
14.6.1 Remove the Unit Cooler Cover 1 Switch AC ON/OFF switch OFF. Disconnect the battery. 2 Remove top drawer, basket, or shelf from the chamber. 3 On the back of the camber, peel putty back to expose drain hose (C).
CAUTION The condensate evaporator and water evaporation tray are hot.
4 Remove drain hose from unit cooler drain port (B).
a Pull drain hose downward to separate from unit cooler.
b Twist drain hose while pulling to assist in removal.
5 Push the drain hose (C) out through rear of chamber.
6 Remove the unit cooler cover.
a Hold unit cooler cover in place to prevent it from dropping.
b Use the socket wrench to remove four screws securing the unit cooler cover.
c Carefully lower unit cooler cover to avoid damage to the fan wiring.
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Page 66
14.6.2 Install the Unit Cooler Cover 1 Verify unit cooler wiring is connected and routed correctly.
a Wiring should be routed above copper tube inside the unit cooler.
b Reconnect wires if they have separated.
2 Attach unit cooler cover.
a Lift unit cooler cover into place.
b Front edge of the cover should be behind the unit cooler case.
c Use the socket wrench to install four screws to secure the unit cooler cover.
3 Insert the drain hose through hole in the refrigerator.
a Push drain hose upward, toward the unit cooler drain port.
b In the chamber, push drain hose onto unit cooler drain port.
4 Reinstall top drawer, basket, or shelf if previously removed.
5 On the back of the chamber, press putty around the drain hose.
6 Switch AC ON/OFF switch ON. Reconnect the battery.
7 Press the Mute button to disable the high temperature alarm while refrigerator reaches operating
temperature.
Horizon Series™ Models
360127-D/D 65
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15 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
does not slide easily.
A door does not open
easily.
The chamber
temperature meets
an alarm condition,
but the appropriate
temperature alarm is
not active.
The chamber
temperature displayed
is higher or lower
than the actual
temperature.
Drawer slide is faulty. ► Conrm the slide is operating correctly. Replace if
Debris in the drawer
slides.
Drawer slides are not
lubricated.
Drawer or basket is
misaligned or not
level.
Debris in the hinges. ► Conrm the hinges are free of debris. Clean the
Door hinges are not
lubricated.
Hinge cam is faulty. ► Conrm the hinge cam is not damaged. Replace
Temperature alarm
setpoint was changed.
Probe bottle is empty,
or the amount of
solution is too low.
Monitor is not
calibrated.
Digital electronics are
locked because of an
interruption in power.
A component is
faulty or internal
connections are loose.
Horizon Series™ Models
necessary.
► Pull the drawer or basket out and conrm the
slides are free of debris. Clean the slides if
necessary.
► Using a lightweight oil, lubricate the bearings in the
slides.
► Conrm both slides for the drawer or basket are
mounted at the same height.
hinges if necessary.
► Using a general-purpose grease, lubricate the
pivots in the hinges.
the cam if necessary.
► Check the current setpoints for the temperature
alarms. Change the setpoints if necessary.
► Check the level of product simulation solution in
the bottle. Rell the bottle if necessary.
► Conrm the monitor probe is reading correctly.
Calibrate the probe if necessary.
► Reset the monitoring system.
► Contact Helmer Technical Service.
15.2 Chamber Temperature Problems
Problem Possible Cause Action
“Prob” appears on
the display, but the
chamber temperature
is set correctly.
360127-D/D 66
Connections for the
monitor probe are
loose.
Monitor probe wiring
is an open circuit.
A component is faulty. ► Contact Helmer Technical Service.
► Test the probe connections. Secure the
connections if necessary.
► Check the continuity of the probe wiring and
connections. Secure the connections or replace
the probe if necessary.
Page 68
Problem Possible Cause Action
The chamber
temperature does
not stabilize at the
refrigerator setpoint.
Monitor/control board
is faulty.
Compressor starting
relay is faulty.
Temperature monitor/
controller board is
faulty.
Condensing unit fan is
not running.
Unit cooler fan is not
running.
► Conrm the temperature controller or monitor/
control board is operating correctly. Replace it if
necessary.
► Conrm the relay is operating correctly. Replace
the relay if necessary.
► Conrm the temperature monitor/controller board
is operating correctly. Replace the board if
necessary.
► Check the condensing unit fan connections.
Replace the fan motor if necessary.
► Check the voltage to the fan when door switch is
activated. Replace the fan motor or door switch if
necessary.
Compressor motor
► Replace the compressor.
has seized.
Control probe is out of
calibration.
► Conrm the probe is providing accurate
temperature readings.
Control probe is faulty. ► Conrm the probe is providing resistance in the
range of 98 Ω to 110 Ω. Replace the probe if
necessary.
Refrigerant level is too
low.
► Check the refrigeration lines for leaks and repair
them if necessary. Check the refrigerant level.
Recharge the refrigerant if necessary.
Probe bottle is empty. ► Rell the probe bottle.
Condenser grill is
dirty.
Air circulation at the
top of the chamber is
► Check the condenser grill. Clean the grill if
necessary.
► Check if there are any items that may obstruct air
ow and remove them if necessary.
not adequate.
Ambient air
► Conrm the refrigerator is placed appropriately.
temperature around
the refrigerator is too
high.
A component is
► Contact Helmer Technical Service.
faulty or internal
connections are loose.
The compressor runs
continuously.
Refrigerator setpoint
is set too low.
Control probe is out of
calibration.
► Conrm the setpoint is set within the operating
range and change it if necessary.
► Conrm the probe is providing accurate
temperature readings.
Control probe is faulty. ► Conrm the probe is providing resistance in the
range of 98 Ω to 110 Ω. Replace the probe if
necessary.
Temperature monitor/
controller board is
faulty.
Compressor starting
relay is faulty.
► Conrm the temperature monitor/controller board
is operating correctly. Replace the board if
necessary.
► Conrm the relay is operating correctly. Replace
the relay if necessary.
Horizon Series™ Models
360127-D/D 67
Page 69
15.3 Alarm Activation Problems
Problem Possible Cause Action
The refrigerator is in
Alarm system is faulty. ► Conrm the monitor/controller board and line
an alarm condition,
but the appropriate
alarm is not audible or
active.
Temperature monitor/
controller board is
faulty.
Alarm buzzer is faulty. ► Replace the alarm buzzer.
Audible alarms have
been muted.
A component is
faulty or internal
connections are loose.
Alarm setpoint was
changed.
Alarm key switch is
switched OFF.
The High Temperature
alarm activates when
the door is opened,
then clears shortly
after the door is
closed.
Connections for the
monitor probe are
loose.
Monitor probe is
faulty.
Unit cooler fan
continues to run while
the door is open.
Probe bottle is empty. ► Check level of product simulation solution in the
High temperature
alarm setpoint is set
too low.
A component is
faulty or internal
connections are loose.
The refrigerator is
connected to power,
but the AC Power
Outlet connection is
faulty.
Power cord is faulty. ► Conrm the power cord is connected securely.
Failure alarm is active.
Temperature control
transformer (HB, HLR,
HPR models) is faulty.
Circuit breaker
was tripped (230 V
models).
A component is
faulty or internal
connections are loose.
Horizon Series™ Models
connections are functioning correctly. Replace the
board if necessary.
► Conrm the temperature monitor/controller board
is operating correctly. Replace the board if
necessary.
► Verify audible alarms are not muted. Verify the
Alarm Disable key switch is not turned off.
► Contact Helmer Technical Service.
► Check the current setpoints for the alarms.
Change the setpoints if necessary.
► Switch the alarm key switch ON.
► Test the probe connections. Secure the
connections if necessary.
► Test the probe. Replace the probe if necessary.
► Test the door switch and unit cooler fan
connections. Secure the connections if necessary.
Replace the door switch or fan motor if necessary.
bottle. Rell bottle if necessary.
► Check the setpoint. Change the setpoint if
necessary.
► Contact Helmer Technical Service.
► Verify power at the outlet. Repair the original
outlet or connect to a different outlet if necessary.
Secure the power cord if necessary.
► Replace the power supply board or the
temperature control transformer.
► Conrm the circuit breaker is seated. Push the
circuit breaker to reset it if necessary.
► Contact Helmer Technical Service.
360127-D/D 68
Page 70
Problem Possible Cause Action
The Door Open
alarm is activating
sporadically.
Door(s) are not
closing completely.
Door(s) are closing
but not sealing
► Conrm the hinge cams are not damaged.
Replace the cams if necessary.
► Conrm the door gasket seals completely.
Replace the door gasket if necessary.
completely.
Connections for the
door switch(s) are
► Test the switch connections. Secure the
connections if necessary.
faulty.
Door switch(es) is
► Replace the door switch or switches.
faulty.
All alarms are
activating sporadically.
Temperature monitor/
controller board is
faulty.
Alarm system is faulty. ► Conrm the monitor/controller board and line
► Conrm the temperature monitor/controller board
is operating correctly. Replace the board if
necessary.
connections are functioning correctly. Replace the
board if necessary.
Temperature monitor/
controller board is
faulty.
A component is
► Conrm the temperature monitor/controller board
is operating correctly. Replace the board if
necessary.
► Contact Helmer Technical Service.
faulty or internal
connections are loose.
An alarm is activated
but the temperature
recorded at activation
Temperature changed
slightly around the
time of activation.
► No action necessary.
does not match the
alarm setpoint.
Horizon Series™ Models
15.4 Condensation Problems
Problem Possible Cause Action
There is excessive
water in the water
evaporation tray.
There is excessive
water in the chamber.
Heater in the
evaporation tray is
faulty.
► Conrm the heater is hot and is drawing the
appropriate current.
► For 115 V refrigerators, the current should be
approximately 0.43 A to 0.55 A.
► For 230 V refrigerators, the current should be
approximately 0.21 A to 0.35 A.
Humid air is entering
the chamber.
► Conrm the refrigerator is level, and the doors
are aligned, closing tightly, and sealing correctly.
Correct issues as necessary.
Humid air is entering
the chamber.
► Conrm the refrigerator is level, and the doors
are aligned, closing tightly, and sealing correctly.
Correct issues as necessary.
Connection between
the unit cooler and the
► Conrm the connection is secure. Tighten the
connection if necessary.
drain tube is loose.
Drain line is plugged. ► Conrm the drain tube is free of debris. Remove
debris if necessary.
360127-D/D 69
Page 71
Problem Possible Cause Action
There is excessive
humidity on the doors.
Humid air is entering
the chamber.
► Conrm the refrigerator is level, and the doors
are aligned, closing tightly, and sealing correctly.
Correct issues as necessary.
Relative humidity
around the refrigerator
► Conrm the refrigerator is placed properly. Refer
to the refrigerator operation manual.
is too high.
Water leaks from
the bottom of the
refrigerator.
Humid air is entering
the chamber.
Excessive water
is found in the
► Conrm the refrigerator is level, and the door is
aligned, closing tightly, and sealing correctly.
► Contact Helmer Technical Service to correct issues
as necessary.
evaporation tray
inside the refrigerator.
Horizon Series™ Models
360127-D/D 70
Page 72
16 Parts
NOTE ► Before replacing parts, protect items in refrigerator from extended exposure to
16.1 Front
Horizon Series™ Models
adverse temperature.
► Allow refrigerator temperature to stabilize at setpoint after replacing parts or after
extended door opening.
A B C
D
Front features (HB120 model shown).
Label Description PartNumber
A Temperature chart recorder (standard on
blood bank models; optional on laboratory/
pharmacy models)
Not
shown
Chart recorder battery 120218 CC
Chart paper (52 sheets) 220366 -
B Horizon Series monitoring and control
system
C Bezel (all models except 111) With chart recorder: 800072-1
Bezel (111 model) With chart recorder: 800056-1
D Caster (swivel with brake) 220467 -
120 V: 800025-1
230 V: 800025-2
Refer to subsequent section(s) for
part numbers
Without chart recorder: 800071-1
Without chart recorder: 800055-1
Schematic
Label
CA
-
-
-
360127-D/D 71
Page 73
16.1.1 Access Control Option
Horizon Series™ Models
A
Access Control features (HB125 model shown).
Label Description PartNumber
A Magnetic lock 800138-1 AXb
B Bezel (all models except 111) With chart recorder: 800074-1
Bezel (111 model) With chart recorder: 800058-1
C Keypad 800007-1 HM
D Backup battery key switch 401220-1 AXa
E Backup battery 120628 AXe
16.1.2 Monitor and Control System and Display
B
C
D
Without chart recorder: 800073-1
Without chart recorder: 800057-1
E
Schematic
Label
-
-
A
B
C
Left: Control board. Right: Display with touchpad.
Label Description PartNumber
Schematic
Label
A Control board assembly 800006-1 HA
B Alarm key switch 120227 HD
C Light switch 120202 HG
NOTE The display board is sensitive to static electricity and can be damaged by electrostatic
discharge. Use proper ESD precautions when handling the board.
360127-D/D 72
Page 74
16.2 Top
Top features.
Horizon Series™ Models
A B C
Label Description PartNumber
Schematic
Label
A 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
B Compressor 120 V
111 model: 800005-1
120 and 125 models: 800111-1
245 and 256 models: 800113-1 (for serial numbers
2000000 through 2002949)
245 and 256 models: 800113-5 (for serial numbers
2002950 and greater)
230 V / 50 Hz
111 model: 800005-2
120 and 125 models: 800111-2
245 and 256 models: 800113-2
230 V / 60 Hz
111 model: 800005-3
120 and 125 models: 800111-3
245 and 256 models: 800113-3
C Monitoring system battery 120399 HH, HJ
K
J
360127-D/D 73
Page 75
16.3 Rear
!
A
Horizon Series™ Models
D
E
B
C
Rear features (HB111 model shown).
Label Description PartNumber
A Electrical box Refer to subsequent section(s) for
B Power cable North American models
C Condensate evaporator assembly
(includes condensate evaporator, tray, and
cover)
D Remote alarm contacts - -
E Main power switch 120478 C
F Circuit breaker (230 V models) Single-door models (6 A): 120429
F
part numbers
120 V: 120630
230 V: 120631
European models
230 V: 120156
115 V
111 model: 400791-1
120, 125, 245, 256 models: 400790-1
230 V
111 model: 400791-2
120, 125, 245, 256 models: 800030-1
(serial numbers 2004286 and later);
Contact Helmer Technical Service for
serial number 2004285 and earlier
Double-door models (7 A): 120428
Schematic
Label
-
A
G
B
CAUTION Do not remove the cover from the condensate evaporator tray.
360127-D/D 74
Page 76
16.3.1 Electrical Box
!
A
B
C
D
E
F
G
H
Horizon Series™ Models
Electrical box features (HPR111 model shown).
CAUTION Disconnect the refrigerator from AC power before opening the electrical box.
Label Description PartNumber
A Alarm buzzer 120160 HE
B Chart recorder transformer (optional) - -
C Access Control power supply
(optional)
D Defrost timer 115 V
E Temperature control transformer 115 V models: 800086-1
F Compressor relay 120426 L
G 12 V cabinet lighting power supply 120624 O
H Power line lter 120400 D
800035-1 AXd
111 model: 800030-1
115 V and 230 V
120, 125, 245, and 256 models: 120556
230 V models: 800086-2
Schematic
Label
HF
HO
NOTE The control board is sensitive to static electricity and can be damaged by electrostatic
discharge. Use proper ESD precautions when handling the board.
360127-D/D 75
Page 77
16.4 Interior
Interior features (HPR245 model shown).
Horizon Series™ Models
E F I
A
B
C
J
D
Label Description PartNumber
Schematic
A Chart recorder probe 800024-1 CB
B Monitor probe 800029-1 IK
C Probe bottle and glycerin kit 400922-1 -
D Lamp assemblies Refer to subsequent section(s) for
part numbers
E Unit cooler Refer to subsequent section(s) for
part numbers
F Door switch 120380 M
I Door - -
J Storage parts Refer to subsequent section(s) for
part numbers
Label
P
F
-
360127-D/D 76
Page 78
16.4.1 Lighting
!
CAUTION Disconnect refrigerator from power when removing and replacing LED lamps.
Horizon Series™ Models
A
Label Description PartNumber
A LED lamp 800049-1 P
16.4.2 Unit Cooler
Left: Unit cooler (single-door model shown). Center and right: Unit cooler parts.
Label Description PartNumber
A Unit cooler assembly 115 V
B Unit cooler fan motor 115 V models: 120540
C Control probe 800028-1 HB
Schematic
Label
A B C
Schematic
Label
F
111 model: 120536
120 and 125 models: 120594
245 models: 120595
230 V
111 model: 120553
120 and 125 models: 120615
245 models: 120616
E
230 V models: 120560
360127-D/D 77
Page 79
16.4.3 Storage
Storage parts (HPR245 model shown).
Horizon Series™ Models
A
B
C
Label Description PartNumber
Not
Half shelf (includes hardware) 120, 125, 245, and 256 models: 400413-1
shown
A Full shelf (includes hardware) 111 model: 400414-3
120 and 245 models: 400414-1
125 and 256 models: 400414-2
B Roll out basket assembly (includes
basket, 2 slides, and hardware)
111 model: 400751-1
120 and 245 models: 400415-1
125 and 256 models: 400415-2
C Drawer assembly (includes drawer, 2
slides, and hardware)
111 model: 400752-2
120 and 245 models: 400370-3
125 and 256 models: 400370-4
Not
shown
Slide assembly (includes 2 slides) 111 model: 400753-1
120 and 245 models: 400714-1
125 and 256 models: 400714-2
Not
shown
Bridge shelf 18” depth: 400845-1
24” depth: 400845-2
360127-D/D 78
Page 80
16.4.4 Door and Hinge
A
Door and hinge features (HLR120 model shown).
Horizon Series™ Models
B
C
D
E
C
F
G
H
Label Description PartNumber
A Door lock 220540
B Upper hinge bracket Left hinge: 400376-2
Right hinge: 400376-1
C Hinge bearings 220375
D Door gasket 111 model: 321082-1
120, 125, 245, and 456 models: 320726-1
E Lower hinge cam (quantity 2) 320742-1
F Door stop 320763-1
G Ground strap 120688
H Lower hinge bracket Right hinge: 400377-1
Left hinge: 400377-2
360127-D/D 79
Page 81
17 Schematics
17.1 HB Model; 11 Cubic Feet (Without Access Control)
AUDIBLE
(HE)
ALARM
-
+
C NCNO
+
-
DOOR
+
-
BATT.
(HJ)
CHART
RECORDER
PROBE
MONITOR
BATTERY
BACKUP
(CB)
12VAC
(HO)
COM
NO
9V
L2-5
TEMP CONTROL XFMR,
No Access Control
EXTERIOR
NC
ALARM
CONTACTS
DOOR SWITCH
UNIT COOLER
(F)
(HD)
ALARM KEY
SWITCH
(HB)
TEMPERATURE
CONTROL
PROBE
(HC)
CHAMBER
MONITOR
PROBE
+
-
(HA)
CONTROL/MONITOR BOARD
CONTROL
MONITOR
9V
(CC)
CHART
RECORDER
BATTERY
BACKUP
RTD
RTD
7
(CA)
CHART
RECORDER
-
+
12VAC
CHART RECORDER XFMR
L1-6 L2-6
L1-4
L2-4
(M)
4
L2-3
L1-3
L1-5
(E)
UNIT COOLER
FAN
(O)
Lighting Power Supply
4
4-32VDC
-
+
3
(L)
COMPRESSOR
SSR
Horizon Series™ Models
(P)
INTERIOR LIGHT
(HG)
LIGHT SWITCH
(J)
COMPRESSOR
3
L2-2
(K)
CONDENSING UNIT
FAN MOTOR
1
L1-2
2
(HJ)-LEFT
(HK)-RIGHT
L1-8
(G)
CONDENSATE
EVAPORATOR
L1-12
Door
Heater
*Option
8
6
L2-8
L2-12
1
Compressor SSR #1
2
Lighting Power Supply
3
4
Control/Monitor XFMR
5
DOOR SWITCH
6
CHART RECORDER XFMR
7
8
DOOR HEATER
9
10
12V DC POWER SUPPLY
11
CONDENSATE EVAPORATOR
12 12
L1
TERMINAL
STRIP
1
GROUND TERMINAL
4
2
Unit Cooler
Power Line Filter
Compressor
5
678 9 103
Condensate Evaporator
Temp Control/Monitor PCB
L2
TERMINAL
STRIP
Door Heater
1
Compressor
2
Lighting Power Supply
3
Control/Monitor XFMR
4
5
Unit Cooler Fan
6
CHART RECORDER XFMR
7
8
DOOR HEATER
9
10
12V DC POWER SUPPLY
11
CONDENSATE EVAPORATOR
L1 OUT
(D)
RFI FILTER
L1 IN
MAIN POWER
115V~ / 60 Hz
230V~ / 50 Hz
230V~ / 60 Hz
L2 OUT
GND
2
(A)
POWER CORD
L2 IN
(C)
MAIN POWER
SWITCH
(B)
CIRCUIT
BREAKER
360127-D/D 80
Page 82
17.2 HB Model; 11 Cubic Feet (With Access Control)
230V~ / 60 Hz
Horizon Series™ Models
(AXa)
MAGNET KEY
(HB)
(AXb)
Door Lock
Magnet
*Option
(HC)
SWITCH
AUDIBLE
(HE)
ALARM
(HD)
ALARM KEY
SWITCH
TEMPERATURE
CONTROL
PROBE
CHAMBER
MONITOR
PROBE
(HM)
Door Access Keypad
*Option
-
+
COM
NC
NO
-
+
(AXe)
MONITOR
BATTERY
BACKUP
12V
+
+
-
(HA)
CONTROL/MONITOR BOARD
CONTROL
MONITOR
9V
(CC)
CHART
RECORDER
BATTERY
BACKUP
*OPTION
TO CHART
RECORDER
-
RTD
RTD
RECORDER
-
+
Power Supply
(CA)
CHART
FROM DC
N/L2
5
(AXd)
L1
L2-3
L1-3
L1-4
L2-4
(O)
Lighting Power Supply
(P)
INTERIOR LIGHT
(HG)
LIGHT SWITCH
Battery
BYPASS
ON
F4
Power Supply PCBA
*Access Control Option Only
-
+
C NCNO
COM
NC
NO
EXTERIOR
ALARM
CONTACTS
+
-
(M)
4
L1-5
(E)
UNIT COOLER
FAN
4
-
+
3
(L)
COMPRESSOR
SSR
(J)
COMPRESSOR
(K)
CONDENSING UNIT
FAN MOTOR
1
4-32VDC
2
L1-2
3
L2-2
DOOR
+
-
BATT.
7
(HJ)
MONITOR
BATTERY
BACKUP
(CB)
CHART
RECORDER
PROBE
9V
L2-5
DOOR SWITCH
UNIT COOLER
(F)
(HJ)-LEFT
(HK)-RIGHT
L1-8
(G)
L1-12
Door
Heater
*Option
8
CONDENSATE
EVAPORATOR
6
L2-8
L2-12
1
Compressor SSR #1
2
3
Temp/Access Control PSU
4
5
DOOR SWITCH
6
Defrost Timer
7
8
DOOR HEATER
9
10
11
CONDENSATE EVAPORATOR
12 12
L1
TERMINAL
STRIP
1
GROUND TERMINAL
4
2
Unit Cooler
Power Line Filter
Compressor
5
678 9 103
DC Power Supply
Condensate Evaporator
1
Compressor
2
3
Temp/Access Control PSU
4
5
Unit Cooler Fan
6
Defrost Timer
7
8
DOOR HEATER
9
10
11
CONDENSATE EVAPORATOR
L2
TERMINAL
STRIP
Door Heater
Temp Control/Monitor PCB
L1 OUT
(D)
RFI FILTER
L1 IN
MAIN POWER
115V~ / 60 Hz
230V~ / 50 Hz
L2 OUT
L2 IN
GND
2
(A)
POWER CORD
(C)
MAIN POWER
SWITCH
(B)
CIRCUIT
BREAKER
360127-D/D 81
Page 83
17.3 HB Model; 20, 25, 45, 56 Cubic Feet (Without Access Control)
AUDIBLE
(HE)
ALARM
(HK)
Right Door
Heater
*Option
(HJ)
Left Door
Heater
*Option
(HB)
TEMPERATURE
(HC)
CHAMBER
(G)
CONDENSATE
EVAPORATOR
L1-12
L1-8
L2-8
L1-10
L2-10
(HD)
ALARM KEY
SWITCH
CONTROL
PROBE
MONITOR
PROBE
6
7
9
+
-
(HA)
CONTROL/MONITOR BOARD
CONTROL
MONITOR
9V
(CC)
CHART
RECORDER
BATTERY
BACKUP
L2-12
L1-9
Pass Thru
Non-Control Side
L2-9
L1-11
L2-11
(HJ)
Pass Thru
Control Side
Heater
*Option
10
RTD
RTD
(CA)
CHART
RECORDER
-
+
12VAC
CHART RECORDER XFMR
L1-6 L2-6
(HK)
Heater
*Option
8
-
+
C NONC
12VAC
TEMP CONTROL XFMR,
(HO)
No Access Control
COM
EXTERIOR
NC
CONTACTS
NO
+
-
DOOR
+
-
BATT.
DOOR SWITCH
9V
DOOR SWITCH
DOOR SWITCH
(CB)
CHART
RECORDER
PROBE
L2-5
1
Compressor SSR #1
2
Lighting Power Supply
3
4
Control/Monitor XFMR Control/Monitor XFMR
Door Switch
5
6
CHART RECORDER XFMR
Defrost Timer
7
Right / Non-Control Side
8
Door Heater
Left / Non-Control Side
9
Door Heater
Left / Control Side Door
10
Heater
Right / Control Side Door Heater
11
CONDENSATE EVAPORATOR
12
L1
TERMINAL
STRIP
DOOR SWITCH
UNIT COOLER FANS
(E)
Double
Door
GROUND TERMINAL
1
2
Power Line Filter
Compressor
ALARM
Snubber Circuit
UNIT COOLER
(F)
4
5
678 9 103
4
Unit Cooler
Condensate Evaporator
L1-4
L2-4
(M)
(M)
(M)
(M)
TERMINAL
Door Heater
Door Heater
L1-5
L2
STRIP
L2-3
L1-3
Door Heater
Lighting Power Supply
Pass Thru
1
Compressor
2
Lighting Power Supply
3
4
5
Unit Cooler Fan
6
CHART RECORDER XFMR
Defrost Timer
7
Right / Non-Control Side
8
Door Heater
Left / Non-Control Side
9
Door Heater
Left / Control Side Door
10
Heater
Right / Control Side Door Heater
11
CONDENSATE EVAPORATOR
12
Door Heater
(O)
4
-
+
3
(L)
COMPRESSOR
SSR
Horizon Series™ Models
(P)
INTERIOR LIGHT
Double Door Only
*Option
(HG)
LIGHT SWITCH
(J)
COMPRESSOR
3
L2-2
(K)
CONDENSING UNIT
FAN MOTOR
1
4-32VDC
2
L1 OUT
L1-2
(D)
RFI FILTER
L1 IN
GND
MAIN POWER
115V~ / 60 Hz
230V~ / 50 Hz
230V~ / 60 Hz
L2 OUT
L2 IN
2
MAIN POWER
SWITCH
CIRCUIT
BREAKER
(A)
POWER CORD
(C)
(B)
360127-D/D 82
Page 84
17.4 HB Model; 20, 25, 45, 56 Cubic Feet (With Access Control)
Horizon Series™ Models
(AXa)
MAGNET KEY
(HB)
(AXb)
Door Lock
Magnet
*Option
*Double Door Only
L1-12
(HK)
Right Door
Heater
*Option
L1-10
(HJ)
Left Door
Heater
*Option
L2-10
SWITCH
AUDIBLE
(HE)
ALARM
(HD)
ALARM KEY
SWITCH
TEMPERATURE
CONTROL
PROBE
(HC)
CHAMBER
MONITOR
PROBE
(HM)
Door Access Keypad
*Option
-
+
COM
NC
NO
-
+
-
+
(G)
CONDENSATE
EVAPORATOR
6
L1-8
7
L2-8
9
(AXe)
MONITOR
BATTERY
BACKUP
+
-
(HA)
CONTROL/MONITOR BOARD
CONTROL
MONITOR
9V
(CC)
CHART
RECORDER
BATTERY
BACKUP
L2-12
L1-9
Pass Thru
Non-Control Side
L2-9
(HJ)
L1-11
Pass Thru
Control Side
Heater
*Option
L2-11
*OPTION
TO CHART
RECORDER
-
12V
+
RTD
RTD
-
(HK)
Heater
*Option
8
10
(CA)
CHART
RECORDER
+
FROM DC
Power Supply
Battery
BYPASS
F4
DOOR
BATT.
L1
TERMINAL
STRIP
ON
-
+
-
RECORDER
L2-5
1
2
3
4
5
6
7
8
9
10
11
12
*Access Control Option Only
-
+
C NONC
COM
NC
NO
+
DOOR SWITCH
9V
DOOR SWITCH
DOOR SWITCH
(CB)
CHART
PROBE
Compressor SSR #1
Lighting Power Supply
TEMP/ACCESS CONTROL
PSU
Door Switch
Defrost Timer
Right / Non-Control Side
Door Heater
Left / Non-Control Side
Door Heater
Left / Control Side Door
Heater
Right / Control Side Door Heater
CONDENSATE EVAPORATOR
DOOR SWITCH
UNIT COOLER FANS
(E)
Double
Door
1
2
Power Line Filter
Compressor
(AXd)
Power Supply PCBA
EXTERIOR
ALARM
CONTACTS
(M)
(M)
(M)
(M)
Snubber Circuit
UNIT COOLER
(F)
4
GROUND TERMINAL
5
678 9 103
4
Unit Cooler
Door Heater
Door Heater
Power Supply PCB
Condensate Evaporator
N/L2
L1
L2-3
L1-3
L1-5
Pass Thru
1
Compressor
2
Lighting Power Supply
3
TEMP/ACCESS CONTROL
4
PSU
5
Unit Cooler Fan
6
Defrost Timer
7
Right / Non-Control Side
8
Door Heater
Left / Non-Control Side
9
Door Heater
Left / Control Side Door
10
Heater
Right / Control Side Door Heater
11
CONDENSATE EVAPORATOR
12
L2
TERMINAL
STRIP
Door Heater
Door Heater
5
L1-4
L2-4
(O)
Lighting Power Supply
(L)
COMPRESSOR
SSR
(J)
COMPRESSOR
(K)
CONDENSING UNIT
FAN MOTOR
4
1
4-32VDC
-
+
2
3
L1-2
L1 OUT
(D)
RFI FILTER
L1 IN
MAIN POWER
115V~ / 60 Hz
230V~ / 50 Hz
230V~ / 60 Hz
(P)
INTERIOR LIGHT
Double Door Only
*Option
(HG)
LIGHT SWITCH
3
L2-2
L2 OUT
L2 IN
GND
2
MAIN POWER
SWITCH
CIRCUIT
BREAKER
(A)
POWER CORD
(C)
(B)
360127-D/D 83
Page 85
17.5 HLR and HPR Models; 11 Cubic Feet (Without Access Control)
Horizon Series™ Models
(P)
INTERIOR LIGHT
(HE)
(HD)
ALARM KEY
(HB)
TEMPERATURE
CONTROL
PROBE
(HC)
CHAMBER
MONITOR
PROBE
AUDIBLE
ALARM
SWITCH
+
-
(HA)
CONTROL/MONITOR BOARD
CONTROL
MONITOR
9V
(CC)
CHART
RECORDER
BATTERY
BACKUP
RTD
RTD
7
(CA)
CHART
RECORDER
-
+
12VAC
CHART RECORDER XFMR
L1-6 L2-6
-
+
C NCNO
+
-
DOOR
+
-
BATT.
(HJ)
CHART
RECORDER
PROBE
MONITOR
BATTERY
BACKUP
(CB)
12VAC
(HO)
COM
NO
9V
L2-5
TEMP CONTROL XFMR,
No Access Control
EXTERIOR
NC
ALARM
CONTACTS
(M)
DOOR SWITCH
UNIT COOLER
(F)
L1-4
L2-4
4
L2-3
L1-3
(E)
UNIT COOLER
FAN
(O)
Lighting Power Supply
L1-7
230V~
115V~
5
6
(HF)
DEFROST TIMER
8
7
4
4-32VDC
-
+
3
(L)
COMPRESSOR
SSR
(HG)
LIGHT SWITCH
L2-7
3
4
2 1
ON TIME
OFF TIME
HLR/HPR= OFF
(J)
COMPRESSOR
(K)
CONDENSING UNIT
FAN MOTOR
1
L1-2
2
L1-5
DEFROST LED
1
2
3
4
OFF
BYPASS SWITCH
DEFROST
INITIATE
3
L2-2
ON
(HJ)-LEFT
(HK)-RIGHT
L1-8
(G)
CONDENSATE
EVAPORATOR
L1-12
Door
Heater
*Option
8
6
L2-8
L2-12
1
Compressor SSR #1
2
Lighting Power Supply
3
4
Control/Monitor XFMR
5
Unit Cooler Fan (Defrost Mode)
6
CHART RECORDER XFMR
7
8
DOOR HEATER
9
10
12V DC POWER SUPPLY
11
CONDENSATE EVAPORATOR
12 12
L1
TERMINAL
STRIP
1
GROUND TERMINAL
4
2
Unit Cooler
Power Line Filter
Compressor
5
678 9 103
Condensate Evaporator
Temp Control/Monitor PCB
L2
TERMINAL
STRIP
Door Heater
1
Compressor
2
Lighting Power Supply
3
Control/Monitor XFMR
4
5
Unit Cooler Fan
6
CHART RECORDER XFMR
7
8
DOOR HEATER
9
10
12V DC POWER SUPPLY
11
CONDENSATE EVAPORATOR
L1 OUT
(D)
RFI FILTER
L1 IN
MAIN POWER
115V~ / 60 Hz
230V~ / 50 Hz
230V~ / 60 Hz
L2 OUT
GND
2
(A)
POWER CORD
L2 IN
(C)
MAIN POWER
SWITCH
(B)
CIRCUIT
BREAKER
360127-D/D 84
Page 86
17.6 HLR and HPR Models; 11 Cubic Feet (With Access Control)
230V~ / 60 Hz
Horizon Series™ Models
(AXa)
MAGNET KEY
(HB)
(AXb)
Door Lock
Magnet
*Option
SWITCH
AUDIBLE
(HE)
ALARM
(HD)
ALARM KEY
SWITCH
TEMPERATURE
CONTROL
PROBE
(HC)
CHAMBER
MONITOR
PROBE
(HM)
Door Access Keypad
*Option
-
+
COM
NC
-
+
NO
RECORDER
(AXe)
MONITOR
BATTERY
BACKUP
+
-
(HA)
CONTROL/MONITOR BOARD
9V
(CC)
CHART
BATTERY
BACKUP
*OPTION
TO CHART
RECORDER
-
12V
+
CONTROL
RTD
MONITOR
RTD
(CA)
CHART
RECORDER
-
+
FROM DC
Power Supply
N/L2
5
(AXd)
L1
(P)
INTERIOR LIGHT
(HG)
LIGHT SWITCH
L1-5
12
DEFROST LED
1
ON TIME
2
3
OFF TIME
4
OFF
BYPASS SWITCH
DEFROST
INITIATE
ON
L2-3
L1-3
L1-4
L2-4
(O)
Lighting Power Supply
L1-7
230V~
115V~
5
6
(HF)
DEFROST TIMER
7
L2-7
4
8
3
HLR/HPR= OFF
Battery
ONBYPASS
F4
Power Supply PCBA
*Access Control Option Only
-
+
NCC
NO
COM
NC
NO
EXTERIOR
ALARM
CONTACTS
+
-
DOOR
+
-
BAT T.
7
(HJ)
(CB)
CHART
RECORDER
PROBE
9V
MONITOR
BATTERY
BACKUP
L2-5
DOOR SWITCH
UNIT COOLER
(F)
(M)
4
(E)
UNIT COOLER
FAN
COMPRESSOR
SSR
(L)
(J)
(K)
CONDENSING UNIT
FAN MOTOR
4
4-32VDC
-
+
3
COMPRESSOR
1
2
3
L2-2
L1-2
Temp Control/Monitor PCB
TERMINAL
STRIP
Door Heater
L2
1
Compressor
2
Lighting Power SupplyLighting Power Supply
3
Temp/Access Control PSU
4
5
Unit Cooler Fan
6
Defrost Timer
7
8
DOOR HEATER
9
10
11
CONDENSATE EVAPORATOR
1212
109876
L1 OUT
(D)
RFI FILTER
L1 IN
MAIN POWER
115V~ / 60 Hz
230V~ / 50 Hz
GND
2
(A)
POWER CORD
L2 OUT
L2 IN
(C)
MAIN POWER
SWITCH
(B)
CIRCUIT
BREAKER
(HJ)-LEFT
(HK)-RIGHT
L1-8
(G)
L1-12
Door
Heater
*Option
8
CONDENSATE
EVAPORATOR
6
L2-8
L2-12
L1
TERMINAL
STRIP
10
11
1
Compressor SSR #1
2
3
Temp/Access Control PSU
4
5
Unit Cooler Fan (Defrost Mode)
6
Defrost Timer
7
8
DOOR HEATER
9
CONDENSATE EVAPORATOR
1
2
Power Line Filter
GROUND TERMINAL
5
3
4
Unit Cooler
DC Power Supply
Condensate Evaporator
Compressor
360127-D/D 85
Page 87
17.7 HLR and HPR Models; 20, 25, 45, 56 Cubic Feet (Without Access Control)
AUDIBLE
(HE)
ALARM
(O)
Lighting Power Supply
L1-7
230V~
6
(HF)
DEFROST TIMER
7
(L)
COMPRESSOR
SSR
(HK)
Right Door
Heater
*Option
(HJ)
Left Door
Heater
*Option
(HB)
TEMPERATURE
(HC)
CHAMBER
(G)
CONDENSATE
EVAPORATOR
L1-12
L1-8
L2-8
L1-10
L2-10
(HD)
ALARM KEY
SWITCH
CONTROL
PROBE
MONITOR
PROBE
6
7
9
+
-
(HA)
CONTROL/MONITOR BOARD
CONTROL
MONITOR
9V
(CC)
CHART
RECORDER
BATTERY
BACKUP
L2-12
L1-9
Non-Control Side
L2-9
L1-11
Pass Thru
Control Side
Heater
*Option
L2-11
RTD
RTD
(CA)
CHART
RECORDER
-
+
12VAC
CHART RECORDER XFMR
L1-6 L2-6
(HK)
Pass Thru
Heater
*Option
8
(HJ)
10
-
+
C NONC
12VAC
TEMP CONTROL XFMR,
(HO)
No Access Control
COM
EXTERIOR
NC
CONTACTS
NO
L1-4
L2-4
ALARM
+
-
DOOR
+
-
BATT.
9V
(CB)
CHART
RECORDER
PROBE
UNIT COOLER FANS
(E)
L2-5
Double
Door
1
Compressor SSR #1
2
Lighting Power Supply
3
4
Control/Monitor XFMR Control/Monitor XFMR
Defrost Timer
5
6
CHART RECORDER XFMR
Defrost Timer
7
Right / Non-Control Side
8
Door Heater
Left / Non-Control Side
9
Door Heater
Left / Control Side Door
10
Heater
Right / Control Side Door Heater
11
CONDENSATE EVAPORATOR
12
L1
TERMINAL
STRIP
1
2
Power Line Filter
(M)
DOOR SWITCH
(M)
DOOR SWITCH
(M)
DOOR SWITCH
(M)
DOOR SWITCH
Snubber Circuit
UNIT COOLER
(F)
4
GROUND TERMINAL
5
678 9 103
4
Unit Cooler
Door Heater
Condensate Evaporator
Compressor
TERMINAL
Door Heater
L2-3
L1-3
Pass Thru
1
Compressor
2
Lighting Power Supply
3
4
5
Unit Cooler Fan
6
CHART RECORDER XFMR
Defrost Timer
7
Right / Non-Control Side
8
Door Heater
Left / Non-Control Side
9
Door Heater
Left / Control Side Door
10
Heater
Right / Control Side Door Heater
11
CONDENSATE EVAPORATOR
12
L2
STRIP
Door Heater
Door Heater
Horizon Series™ Models
INTERIOR LIGHT
Double Door Only
*Option
(HG)
LIGHT SWITCH
115V~
5
4
-
+
3
L2-7
4
8
4-32VDC
HLR/HPR= OFF
(J)
(K)
CONDENSING UNIT
FAN MOTOR
3
2 1
ON TIME
OFF TIME
COMPRESSOR
1
L1-2
2
L1 OUT
(D)
RFI FILTER
L1 IN
MAIN POWER
115V~ / 60 Hz
230V~ / 50 Hz
230V~ / 60 Hz
L1-5
DEFROST LED
1
2
3
4
OFF
BYPASS SWITCH
DEFROST
INITIATE
3
GND
2
(A)
POWER CORD
ON
L2-2
L2 OUT
(P)
L2 IN
(C)
MAIN POWER
SWITCH
(B)
CIRCUIT
BREAKER
360127-D/D 86
Page 88
17.8 HLR and HPR Models; 20, 25, 45, 56 Cubic Feet (With Access Control)
230V~ / 60 Hz
Horizon Series™ Models
(AXa)
MAGNET KEY
(HB)
(AXb)
Door Lock
Magnet
*Option
*Double Door Only
L1-12
(HK)
Right Door
Heater
*Option
(HJ)
Left Door
Heater
*Option
SWITCH
(HE)
(HD)
ALARM KEY
SWITCH
TEMPERATURE
CONTROL
PROBE
(HC)
CHAMBER
MONITOR
PROBE
(HM)
Door Access Keypad
*Option
-
+
NC
-
+
-
+
(G)
CONDENSATE
EVAPORATOR
L1-8
L2-8
L1-10
L2-10
AUDIBLE
ALARM
COM
NO
6
7
9
(AXe)
MONITOR
BATTERY
BACKUP
(HA)
CONTROL/MONITOR BOARD
(CC)
CHART
RECORDER
BATTERY
BACKUP
L2-12
L1-9
L2-9
L1-11
L2-11
*OPTION
TO CHART
RECORDER
-
12V
+
+
-
CONTROL
RTD
MONITOR
RTD
-
+
9V
(HK)
Pass Thru
Non-Control Side
Heater
*Option
8
(HJ)
Pass Thru
Control Side
Heater
*Option
10
(CA)
CHART
RECORDER
FROM DC
Power Supply
Battery
F4
L1
TERMINAL
STRIP
ONBYPASS
DOOR
+
BAT T.
-
+
NO
C
NC
+
-
-
9V
(CB)
CHART
RECORDER
PROBE
UNIT COOLER FANS
(E)
L2-5
Double
Door
1
Compressor SSR #1
2
Lighting Power Supply
3
TEMP/ACCESS CONTROL
4
PSU
Defrost Timer
5
6
Defrost Timer
7
Right / Non-Control Side
8
Door Heater
Left / Non-Control Side
9
Door Heater
Left / Control Side Door
10
Heater
Right / Control Side Door Heater
11
CONDENSATE EVAPORATOR
12
1
N/L2
L1
(AXd)
Power Supply PCBA
*Access Control Option Only
COM
EXTERIOR
NC
ALARM
CONTACTS
NO
(M)
DOOR SWITCH
(M)
DOOR SWITCH
(M)
DOOR SWITCH
(M)
DOOR SWITCH
Snubber Circuit
UNIT COOLER
(F)
4
TERMINAL
GROUND TERMINAL
5
3
4
2
Unit Cooler
Power Line Filter
Power Supply PCB
Door Heater
Door Heater
Condensate Evaporator
Compressor
L2-3
L1-3
Pass Thru
1
Compressor
2
Lighting Power Supply
3
TEMP/ACCESS CONTROL
4
PSU
5
Unit Cooler Fan
6
Defrost Timer
7
Right / Non-Control Side
8
Door Heater
Left / Non-Control Side
9
Door Heater
Left / Control Side Door
10
Heater
Right / Control Side Door Heater
11
12
CONDENSATE EVAPORATOR
L2
STRIP
109876
Door Heater
Door Heater
5
L1-4
L2-4
(O)
Lighting Power Supply
L1-7
230V~
115V~
5
6
(HF)
DEFROST TIMER
7
(L)
COMPRESSOR
SSR
L2-7
4
HLR/HPR= OFF
8
(J)
(K)
CONDENSING UNIT
FAN MOTOR
4
4-32VDC
-
+
3
3
COMPRESSOR
1
2
L1 OUT
L1 IN
(HG)
LIGHT SWITCH
L1-5
12
DEFROST LED
1
ON TIME
2
3
OFF TIME
4
OFF
BYPASS SWITCH
DEFROST
INITIATE
3
L2-2
L1-2
(D)
RFI FILTER
GND
2
(A)
POWER CORD
MAIN POWER
115V~ / 60 Hz
230V~ / 50 Hz
(P)
INTERIOR LIGHT
Double Door Only
*Option
ON
L2 OUT
L2 IN
(C)
MAIN POWER
SWITCH
(B)
CIRCUIT
BREAKER
ENDOFMANUAL
360127-D/D 87
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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