Esco Lexicon User manual

User
Manual
Thank you for purchasing this Esco Ultra-Low Temperature
Freezer. Please read this manual thoroughly to familiarize
yourself with the many unique features and exciting
innovations we have built into your new equipment. Esco
provides many other resources at our website,
www.escoglobal.com, to complement this manual and help you
enjoy many years of productive and safe use of your Esco
products.
Esco Technologies, Inc.
2940 Turnpike Drive, Units 15-16 • Hatboro, PA 19040, USA
Toll-Free USA and Canada 1-877-479-3726
Tel [phone] • Fax [phone]
us.escoglobal.com • [e-mail]
Esco Micro Pte. Ltd.
21 Changi South Street 1 • Singapore 486 777
Tel [phone] • Fax [phone]
www.escoglobal.com • [email protected]

Copyright Information
© Copyright 2011 Esco Micro Pte. Ltd. All rights reserved.
The information contained in this manual and the accompanying product is copyrighted and all rights are
reserved by Esco.
Esco reserves the right to make periodic minor design changes without obligation to notify any
person or entity of such change.
Lexicon® is a registered trademark of Esco.
“Material in this manual is provided for informational purposes only. The contents and the product described in
this manual (including any appendix, addendum, attachment or inclusion), are subject to change without
notice. Esco makes no representations or warranties as to the accuracy of the information contained in this
manual. In no event shall Esco be held liable for any damages, direct or consequential, arising out of or related
to the use of this manual.”

Ultra-Low Temperature Freezer
i
Introductory Page
i
Table of Contents
iii
Warranty Terms and Conditions
v
Introduction
v
1. Products Covered
v
2. Safety Warning
v
3. Limitation of Liability
v
4. European Union Directives on WEEE and RoHS
vii
Declaration of Conformity
1
Chapter 1 –Product Information
1
1.1 About Lexicon Ultra-Low Temperature Freezers
1
1.2 Labels
2
1.3 Quick View
2
1.3.1 Front Quick View
3
1.3.2 Back Quick View
5
Chapter 2 –Installation
5
2.1 General Requirements
5
2.1.1 Location Requirements
6
2.1.2 Environmental Requirements
6
2.1.3 Power Requirements
6
2.2 Installation
6
2.2.1 Unit Leveling
7
2.2.2 Shelves Installation
8
2.2.3 Omega Brackets Installation
8
2.2.4 Remote Alarm Contacts Connection
8
2.2.5 Electrical Supply Connection and Power Protection Bracket Installation
9
2.3 First Run
9
2.4 Disclaimer
11
Chapter 3 –Control System and Operation
11
3.1 Freezer Control System
11
3.2 Temperature Offset Calibration
12
3.3 Set Temperature & Hysteresis
12
3.4 Operating the Freezer
12
3.4.1 Products Loading
12
3.4.2 Opening and Closing the Door
12
3.4.3 Locking the Main Door
13
3.5 Alarm
13
3.5.1 High Temperature Alarm
13
3.5.2 Power Failure Alarm
15
Chapter 4 –General Maintenance
15
4.1 Scheduled Maintenance
15
4.2 General Cleaning
15
4.3 Condenser Cleaning
15
4.4 Air Filter Cleaning
16
4.5 Door Gasket Cleaning
16
4.6 Vacuum Relief Port Cleaning
16
4.7 Defrost and Cleaning
16
4.8 PF Battery Checking
16
4.9 Preparing the Unit for Storage
16
4.10 Maintenance/Service Log

ii
17
Chapter 5 –Accessories Installation
17
5.1 LCO2/LN2Backup System
17
5.2 Chart Recorder
19
Chapter 6 –Troubleshooting
21
Chapter 7 –Engineering Details
21
7.1 Engineering Drawing
22
7.2 General Specifications
Appendix

Ultra-Low Temperature Freezer
iii
Esco products come with either a 1, 2 or 3 year limited warranty, depending on the product purchased,
beginning on the date of shipment from any Esco international warehousing location. To determine which
warranty applies to your product, refer to the appendix below.
Esco's limited warranty covers defects in materials and workmanship. Esco's liability under this limited
warranty shall be, at our option, to repair or replace any defective parts of the equipment, provided if proven
to the satisfaction of Esco that these parts were defective at the time of being sold, and that all defective parts
shall be returned, properly identified with a Return Authorization.
This limited warranty covers parts only, and not transportation/insurance charges.
This limited warranty does not cover:
Freight or installation (inside delivery handling) damage. If your product was damaged in transit, you
must file a claim directly with the freight carrier.
Products with missing or defaced serial numbers.
Products for which Esco has not received payment.
Problems that result from:
oExternal causes such as accident, abuse, misuse, problems with electrical power, improper
operating environmental conditions.
oServicing not authorized by Esco.
oUsage that is not in accordance with product instructions.
oFailure to follow the product instructions.
oFailure to perform preventive maintenance.
oProblems caused by using accessories, parts, or components not supplied by Esco.
oDamage by fire, floods, or acts of God.
oCustomer modifications to the product
Consumables such as filters (HEPA, ULPA, carbon, pre-filters) and fluorescent / UV bulbs.
Esco is not liable for any damage incurred on the objects used on or stored in Esco equipment. If the
objects are highly valuable, user is advised to have in place independent external preventive
measures such as connection to a centralized alarm system.
Factory installed, customer specified equipment or accessories are warranted only to the extent guaranteed by
the original manufacturer. The customer agrees that in relation to these products purchased through Esco, our
limited warranty shall not apply and the original manufacturer's warranty shall be the sole warranty in respect
of these products. The customer shall utilize that warranty for the support of such products and in any event
not look to Esco for such warranty support.
Esco encourages all users to register their equipment online at www.escoglobal.com/warranty or complete the
warranty registration form included with each product.
ALL EXPRESS AND IMPLIED WARRANTIES FOR THE PRODUCT, INCLUDING BUT NOT LIMITED TO ANY IMPLIED
WARRANTIES AND CONDITIONS OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
LIMITED IN TIME TO THE TERM OF THIS LIMITED WARRANTY. NO WARRANTIES, WHETHER EXPRESS OR
IMPLIED, WILL APPLY AFTER THE LIMITED WARRANTY PERIOD HAS EXPIRED. ESCO DOES NOT ACCEPT LIABILITY
BEYOND THE REMEDIES PROVIDED FOR IN THIS LIMITED WARRANTY OR FOR SPECIAL, INDIRECT,
CONSEQUENTIAL OR INCIDENTAL DAMAGES, INCLUDING, WITHOUT LIMITATION, ANY LIABILITY FOR THIRD-
PARTY CLAIMS AGAINST YOU FOR DAMAGES, FOR PRODUCTS NOT BEING AVAILABLE FOR USE, OR FOR LOST
WORK. ESCO'S LIABILITY WILL BE NO MORE THAN THE AMOUNT YOU PAID FOR THE PRODUCT THAT IS THE
SUBJECT OF A CLAIM. THIS IS THE MAXIMUM AMOUNT FOR WHICH ESCO IS RESPONSIBLE.

iv
These Terms and Conditions shall be governed by and construed in accordance with the laws of Singapore and
shall be subject to the exclusive jurisdiction of the courts of Singapore.
Technical Support, Warranty Service Contacts
USA: 1-877-479-3726
Singapore: [phone]
Global Email Helpdesk: supp[email protected]m
Visit http://www.escoglobal.com/ to talk to a Live Support Representative
Distributors are encouraged to visit the Distributor Intranet for self-help materials.
Product Appendix, Warranty Listings
Biological Safety Cabinets, Laminar Flow Cabinets,
HEPA-Filtered Cabinets (except Streamline brand)
The warranty periods for BSC may vary by country. Contact
your local distributor for specific warranty details.
Laboratory Fume Hoods
1 year limited.
Ductless Fume Hoods
3 years limited for Ascent Opti's, 5 years for Ascent Max's.
Cleanroom Equipment
1 year limited.
Laboratory Ovens and Incubators
1 year limited.
CO2Incubators
2 years limited.
Containment/Pharma Products
2 years limited.
Ultralow Temperature Freezer
3 years limited. 60 months on Compressor.
The warranty period starts two months from the date your equipment is shipped from Esco facility for
international distributors. This allows shipping time so the warranty will go into effect at approximately the
same time the equipment is delivered to the user. The warranty protection extends to any subsequent owner
during the warranty period. Distributors who stock Esco equipment are allowed an additional four months for
delivery and installation, providing the product is registered with Esco. User can register product online at
www.escoglobal.com/warranty or complete the warranty registration form included with each product.
Policy updated on 12th Apr 2011 (This limited warranty policy does not apply to products purchased before 12th
Apr 2011)

Ultra-Low Temperature Freezer
v
1. Products Covered
Lexicon Ultra-Low Temperature Freezer
Model
Storage Volume
Temperature Range
Freezer Control
UUS-668A-1
668.8 Liter / 23.6 ft3
-50oC to -86oC
Industrial Digital Controller
Power rating for all models is 230 VAC, 50 Hz, 1 Φ
2. Safety Warning
Anyone working with, on or around this equipment should read this manual. Failure to read,
understand and follow the instructions given in this documentation may result in damage to the unit,
injury to operating personnel, and / or poor equipment performance.
Any internal adjustment, modification or maintenance to this equipment must be undertaken by
qualified service personnel.
The use of any hazardous materials in this equipment must be monitored by an industrial hygienist,
safety officer or some other suitably qualified individual.
Before you proceed, you should thoroughly understand the installation procedures and take note of
the environmental / electrical requirements.
In this manual, important safety related points will be marked with the symbol.
If the equipment is used in a manner not specified by this manual, the protection provided by this
equipment may be impaired.
3. Limitation of Liability
The disposal and / or emission of substances used in connection with this equipment may be governed by
various local regulations. Familiarization and compliance with any such regulations are the sole responsibility
of the users. Esco’s liability is limited with respect to user compliance with such regulations.
4. European Union Directive on WEEE and RoHS
The European Union has issued two directives:
• Directive 2002/96/EC on Waste Electrical and Electronic Equipment (WEEE)
This product is required to comply with the European Union’s Waste Electrical &
Electronic Equipment (WEEE) Directive 2002/96/EC. It is marked with the following
symbol:
Esco sells products through distributors throughout Europe. Contact your local Esco
distributor for recycling/disposal.
• Directive 2002/95/EC on Restriction on the use of Hazardous Substances (RoHS)
With respect to the directive on RoHS, please note that this freezer falls under category 8 (medical devices)
and category 9 (monitoring and control instruments) and is therefore exempted from requirement to comply
with the provisions of this directive.

vi

Ultra-Low Temperature Freezer
vii
Declaration of Conformation
In accordance to EN ISO/IEC 17050-1:2010
We, Esco Micro Pte. Ltd.
of 21 Changi South Street 1
Singapore, 486777
Tel: [phone]
Fax: [phone]
declare on our sole responsibility that the product:
Category : Ultra-Low Temperature Freezer
Brand : Lexicon
Model : UUS-668A-1
in accordance with the following directives:
2006/95/EEC : The Low Voltage Directive and its amending directives
92/31/EEC : The Electromagnetic Compatibility Directive and its amending
directives
has been designed to comply with the requirement of the following Harmonized Standard:
Low Voltage : EN 61010-1:2010
EMC : EN 61326-1:2006 Class B
More information may be obtained from Esco’s authorized distributors located within the European Union. A
list of these parties and their contact information is available on request from Esco.
_______________________________
XQ Lin
Group CEO, Esco
(Feb 23rd,2011)
This Declaration of Conformity is only applicable for 230V AC 50Hz units

viii

1
Ultra-Low Temperature Freezer
-
1.1 About Lexicon™Ultra-Low Temperature Freezers
Esco Lexicon™ultra-low temperature freezers are designed to store critical biological samples, agents and
general non-flammable laboratory materials at a temperature range of -50oC to -86oC. Among many features
and characteristics, long term reliability of the freezers to sustain the required cold temperature, low sound
level and low energy consumption are priorities. The freezer units feature a simple microprocessor control
that allows an easy and direct set point control, a heavy duty latch for secure door seal, and four adjustable
shelves of 45.36 kg (100 lbs.) capacity each.
ESCO Lexicon™ULT’s are manufactured with the best manufacturing techniques and highest standards known
in the field of specialty refrigeration equipment.
1.2 Labels
Model –model of the unit
Serial –the unit’s serial number
Manufactured in … - year of manufacture
Electrical –electrical requirement
Refrigerant Charge:
First Stage –amount, type and charge pressure of refrigerant
charging
Second Stage –amount, type and charge pressure of refrigerant
charging

2
1.3 Quick View
1.3.1 Front Quick View
1. Main Handle
2. Vacuum Relief
3. Inner Door
4. Embedded Pulls
5. Inner Doors Magnet
6. Shelves
7. Access Port
8. Control Panel
9. Air Vents / Intakes
10. Caster Wheel with Adjustable Foot
11. Cabinet Support
12. Control Probe
13. Power Failure (PF) Battery Location
14. PF Battery Disconnect Switch

3
Ultra-Low Temperature Freezer
1.3.2 Back Quick View
1. Main Switch
2. Power Inlet
3. Remote Alarm Contact
4. Power Protection Bracket
1
2
3
4

4

5
Ultra-Low Temperature Freezer
–
2.1 General Requirement
2.1.1 Location Requirements
Install the unit on a firm and level floor in an indoor environment.
Allow at least 150 mm (6”) of open space on all sides from the sides, top and rear.
The location should be sufficiently ventilated so the heat from the unit can be removed from the area
to prevent any potential overheating condition of the ambient temperature.
Avoid installing a unit in an area with direct heat source such as sunlight, heat radiator, and other
heat sources.

6
2.1.2 Environmental Requirements
Indoor use
Altitudes of up to 2000 meters (6600’)
Up to 90% relative humidity –non-condensing
Temperature between 15OC - 32OC (59OF - 90OF)
Note: Recommended operating temperature is 25oC (77oF).
Must be installed in room with sufficient ventilation. The room ventilation should be a technical
ventilation that is in accordance with the requirements of ZH 1/119 (Guidelines for laboratories) or
some other suited ventilation system with appropriate capacity.
2.1.3 Power Requirements
Designed for 230 VAC 50Hz 1Φelectrical rating
An unobstructed dedicated power outlet which is not shared with other appliances.
Installation Category: II
Note: Installation category (over voltage category) defines the level of transient over voltage which the
instrument is designed to withstand safely. It depends on the nature of the electricity supply and its over voltage
protection means. For example, in CAT II, which is the category used for instruments in installations supplied from
a supply comparable to public mains such as hospital and research laboratories and most industrial laboratories,
the expected transient over voltage is 2500 V for a 230 V supply and 1500 V for a 120 V supply.
Performance criteria B in voltage dips & short interruptions immunity test.
Note: During the voltage dips & short interruptions immunity test, flicker of the fluorescent light was observed
when the voltage dips and short interruption were being applied on the AC mains port of the equipment and self-
recovered after the test.
It is recommended that the voltage fluctuation doesn't exceed ±10% of the nominal voltage at all
times, or else an electrical power stabilizer can be installed.
UPS is recommended for better protection. If UPS is not used and there is a power failure, the
operator must take immediate action to prevent the danger of potential warm-up.
2.2 Installation
2.2.1 Unit Leveling
It is important that the equipment is properly leveled by positioning a bubble level on the middle shelf of the
freezer. The freezer has built in leveling feet for adjustment. To raise a corner with a leveling foot, use a cross
wrench to turn the leveling leg that appears to be in a low position in the counterclockwise direction.
Leveling feet
Caster Wheel

7
Ultra-Low Temperature Freezer
2.2.2 Shelves Installation
To change the position of the shelves, remove and re-install the pilaster clips (front and back) at desired shelf
level.
1. Open main door
2. Open all inner doors
3. Rotate shelf 45overtically
4. Slide the shelf into the freezer chamber –on
top of the pilasters
5. Ensure the pilaster clips go through the holes
on the shelf
1. Put the first hook (1) into the pilaster hole
(4a)
2. Press upwards, then put the second hook
(2) into the pilaster hole (4b)
3. Install the shelf by aligning the third hook
(3) with the shelf hole - hole located
underneath the shelf (5)
1
2
3
4a
5
4b

8
2.2.3 Omega Brackets Installation
Omega brackets are used to ensure the required distance from the wall is maintained.
2.2.4 Remote Alarm Contacts Connection
External alarm can be connected to the remote alarm
contacts located at the back of the freezer base above
the power cord. These remote alarm contacts will
transmit a DC voltage upon occurrence of a high
temperature (HA) and power failure (PF) alarm. The
contacts provide 12 VDC (+) and (-) connectivity.
2.2.5 Electrical Supply Connection and
Power Protection Bracket Installation
Plug the power cord (1) into the power inlet at the
rear of the unit. Turn on the power switch (2). Install
the power protection bracket (3) over the power cord
and power switch by installing the 3 screws into the
pre-tapped holes.
1. Attach the bracket(1) to its place –sync the hole in
the bracket(1) to the hole in the unit
2. Screw the M6 bolts into the designated place (the
holes on top and below the bracket(1))
3. Repeat the 2 steps above with the other bracket(1)
1
2
1
3

9
Ultra-Low Temperature Freezer
2.3 First Run (Also required whenever the freezer is turned off or moved)
Before activating the unit for the first time, ensure that there’s no object other than the shelves inside the
freezer.
Turn on the power switch. The controller will light up. The first stage compressor gets the power and starts
working. When the heat exchanger inside the freezer becomes cold enough and reaches a predetermined
temperature, the second stage compressor starts. The unit continues to operate until it reaches the set
temperature.
Lexicon™Ultra-Low Temperature freezers have an operating temperature of -50 °C to -86 °C, depending on
the ambient temperature. The freezer is shipped from the factory with a temperature set point of -80 °C. Refer
to section 3.2 to change temperature setting.
ULTF S-series controller has 2 switches for alarms located behind the right bottom door.
Once the unit reaches set point temperature, open the outer and the inner doors to load in half of the racks.
In the process of doing so, the freezer temperature is expected to warm up. Let the unit recover to the set
temperature then load in the rest of the racks.
If the freezer does not require any racks, let the unit run at set point for at least 48 hours for observation
before placing any products inside the unit.
2.4 Disclaimer
The performance and safety of the freezer, while rigorously evaluated at the factory, cannot be guaranteed
after transit and installation. Therefore the on-site testing is always recommended.
Power failure alarm
High temperature alarm
Power failure switch should always be turned on when the
unit runs. (Warning: Make sure the scheduled maintenance for
PF battery is carried out; refer to chapter 4, to ensure the battery
stays charged when the unit is on).
On the other hand, high temperature alarm switch should
remain off during initial start-up run in order to avoid
nuisance alarm beeping during pull down. It should only be
turned on once the unit has reached the temperature set
point.

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