Planer Integra 750Plus User manual

®
Instructions for use
Integra 750Plus
MA008797 13.0.2651

3
Table of Contents
1. Introduction to the Integra 750Plus 5
1.1 Notices ............................................................................................................................ 6
1.2 Symbols ........................................................................................................................... 6
1.2.1 Symbols used in this manual .................................................................................... 6
1.2.2 Symbols used on the freezer .................................................................................... 7
1.3 Safety precautions ......................................................................................................... 7
1.3.1 First aid ..................................................................................................................... 7
1.3.2 Safety ........................................................................................................................ 7
1.3.3 EMC precautions ...................................................................................................... 9
1.4 Indications for use ......................................................................................................... 9
1.5 About this Manual ....................................................................................................... 10
1.6 The Integra 750Plus components ............................................................................... 10
1.6.1 The Integra 750Plus freezer ................................................................................... 11
1.6.2 Liquid nitrogen delivery system ............................................................................. 12
1.6.3 Personal Computer (PC) ......................................................................................... 13
1.6.4 Printer ..................................................................................................................... 14
2. Installing the Integra 750Plus 15
2.1 Preparation .................................................................................................................. 16
2.2 Unpacking the equipment .......................................................................................... 16
2.3 Installing the freezer .................................................................................................... 17
2.4 Installing a Dura-Lo or Dura-Tech
Cylinder ......................................................................................................................... 18
2.5 Installing a Planer Pump and Dewar .......................................................................... 18
2.5.1 Attaching the delivery tube .................................................................................... 19
2.5.2 Putting liquid nitrogen into the dewar ................................................................... 19
2.5.3 Fitting the pump ..................................................................................................... 19
2.6 Freezer lifting instructions .......................................................................................... 20
3. Operating the Integra 750Plus 23
3.1 Maintaining a Planer dewar ....................................................................................... 24
3.1.1 Removing the pump ............................................................................................... 25
3.2 Freezing samples .......................................................................................................... 25
3.2.1 The procedure to follow ......................................................................................... 26
3.2.2 Stopping a run ........................................................................................................ 27
3.2.3 Shutting down the system ...................................................................................... 27
3.2.4 Power failures ........................................................................................................ 27
3.2.5 Dealing with a system lockup ................................................................................ 27
3.3 Alarms ........................................................................................................................... 28
3.4 Maintaining the equipment ........................................................................................ 28
3.4.1 Routine maintenance ............................................................................................. 29

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Table of Contents
3.4.2 Cleaning the Integra 750Plus freezer ..................................................................... 29
3.4.3 Calibrating the system ........................................................................................... 30
3.4.4 Changing fuses ....................................................................................................... 31
3.4.5 Disposal .................................................................................................................. 31
4. Troubleshooting 33
4.1 Integra 750Plus freezer ................................................................................................ 34
4.2 LNP4 liquid nitrogen pump ......................................................................................... 35
4.3 Dewar ............................................................................................................................ 36
5. Additional information 37
5.1 Integra 750Plus specifications ..................................................................................... 38
5.1.1 Integra 750Plus freezer .......................................................................................... 38
5.1.2 AUX connector ........................................................................................................ 39
5.1.3 EU Declaration of Conformity ................................................................................ 40
5.2 Spare parts ................................................................................................................... 40
5.2.1 Ordering spares ...................................................................................................... 40
5.2.2 Integra 750Plus fuses ............................................................................................. 41
43
Index

Introduction to the Integra 750Plus

6
Introduction to the Integra 750Plus
1 Introduction to the Integra 750Plus
This document contains important information concerning the safe use of the equipment.
Ensure that you have read and fully understand these instructions before attempting to
use this equipment.
1.1 Notices
Instructions for use: Integra 750Plus
Issue: 13.0.2651 2020-01-30
© 2020 Planer Limited
Original instructions
Planer Limited. 110 Windmill Rd., Sunbury-on-Thames, Middlesex,
TW16 7HD, UK. Tel: [phone]; email: [e-mail]
This equipment contains batteries and other components that have a limited life. To
ensure the long life of the equipment and help ensure trouble-free operation, we
recommend that you join one of our Maintenance and Support Schemes. Please contact
your supplier for details.
Good practice demands that in critical applications, reliance should not be placed on a
single source of data. Hard copies and backup copies should be routinely kept.
All equipment supplied by Planer Limited is subject to a Warranty Agreement and
Limited Liability. In addition, software products are not sold but are licensed for use and
are subject to a Licence Agreement.
You may freely copy and distribute this document for personal use in any form provided
that the document is reproduced in full and includes these notices. Individual pages and
forms may be freely copied for the purposes of implementing any instructions within the
documentation. You may not make modifications or create derivative works. Any
modification to these conditions requires the written permission of Planer Limited.
Product names and designations that are referred to in this document may be
trademarks or registered trademarks or both and are recognised as the property of their
respective owners.
This information is provided without warranty, express or implied, and including but not
limited to any implied warranties in respect of merchantability or fitness for any purpose,
except to the extent that such provisions are held to be void, in violation of applicable
law, or unenforceable in a specific jurisdiction.
Planer Limited reserves the right to alter products and their specifications without notice.
1.2 Symbols
1.2.1 Symbols used in this manual
Failure to follow these instructions could result in personal injury.
Failure to follow these instructions could result in damage to equipment or
samples.

7
Introduction to the Integra 750Plus
This indicates first-aid advice.
1.2.2 Symbols used on the freezer
Warning: consult the manual and the accompanying documentation.
Mains supply ON
Mains supply OFF
Alternating current
RUN key
STOP key
HEAT manual override
COOL manual override
Caution — hot surface
1.3 Safety precautions
IT IS IMPORTANT TO READ THESE SAFETY INSTRUCTIONS PRIOR
TO OPERATING ANY EQUIPMENT.
1.3.1 First aid
IF IN DOUBT, SEEK IMMEDIATE MEDICAL ATTENTION. If any quantity of
liquid nitrogen comes into contact with the skin or eyes, immediately flood
that area of the body with large quantities of unheated water, apply cold
compresses and seek medical attention. If the skin is blistered or there is
any possibility that eyes have been affected, the patient should be taken
immediately to a doctor or hospital for treatment.
1.3.2 Safety
Failure to comply with these instructions could result in personal injury

8
Introduction to the Integra 750Plus
· Operating the system in a manner not specified within this manual or under conditions
outside of the specifications, see Integra 750Plus specifications , may result in the
protection offered by the equipment being impaired.
· Never leave a freezer unattended when running a program.
· Avoid nitrogen build up: anywhere liquid nitrogen is used must be well ventilated to
reduce the risk of nitrogen build up. Small volumes of liquid nitrogen convert to very
large volumes of gas. This can result in drowsiness, or in extreme cases,
asphyxiation.
· When liquid nitrogen is used in confined spaces, oxygen-deficiency alarms must be
installed. Guidance on ventilation requirements are given in BCGA Code of Practice
CP30, The safe use of liquid nitrogen dewars up to 50 litres.
· When there is a risk of reduced or insufficient ventilation when a room is unoccupied,
then alarms to indicate oxygen deficiency must be installed and positioned outside of
the room so that operators are aware of the hazard before entering. The operational
status of such an alarm should also be visible from outside the room.
· If liquid nitrogen is used in an area that requires forced ventilation, an alarm to indicate
its failure should be fitted.
· When dispensing or potentially being exposed to liquid nitrogen, protect the face with
a shield and wear gloves, boots and a protective apron. Prevent spillage into shoes
and onto unprotected parts of the body.
· Handle vessels containing liquid nitrogen carefully. Liquid nitrogen boils at -196ºC and
both liquid and gas can cause rapid and severe frostbite. Delicate tissue, e.g. the
eyes, can be damaged by an exposure to the cold gas, which may be too brief to
affect the skin of the hands or face.
· Stand clear of boiling and splashing liquid nitrogen and its gas when filling a dewar at
normal room temperature or when inserting objects (such as a pump) into the liquid.
· Use tongs or wear cryogloves when handling cold or hot objects. Cryogloves are
available as an accessory from Planer. When running a program, the chamber and
contents may get cold enough to cause frostbite or hot enough to cause burns.
· If a dewar with a pump is being used, it must be depressurised before the pump can
be removed. This is achieved by opening the pressure-relief valve mounted on the side
of the pump, which seals an orifice in the pressure system by toggle action. Avoid
contact with cold nitrogen gas when depressurising the dewar.
· The dewars used with this equipment must never be used to store any liquid other
than liquid nitrogen.
· Only use vessels designed for working with liquid nitrogen.
· Secure the liquid nitrogen container to prevent toppling.
· Ensure that the delivery pipe connections are secure and leak-free before supplying
liquid nitrogen to the freezer.
· Liquid nitrogen pressure must not exceed 1.5 bar (22 psi).
· To maintain protection against electric shock, the mains lead must be properly fitted
to a 3-way mains connector plugged into an earthed mains outlet.
· Because of the potentially wet laboratory environment, the operator should be provided
with additional protection against electric shock by supplying mains power to the
freezer through a residual current circuit breaker (RCCB) operating at a differential of
38

9
Introduction to the Integra 750Plus
30 mA. Note that care must be taken to ensure that the freezer is not compromised
by faulty equipment sharing the same supply and causing nuisance trips.
· The 9-way plug on the Controller is only for connecting to the RS232 serial port of a
computer which complies with IEC950.
· The AUXsocket on the Controller is to be used only for calibration by qualified service
personnel. It must not be connected to any other equipment.
· The Sample PRT socket inside the chamber is only to be used with a Planer Sample
PRT.
· When heating under manual control, check the chamber temperature at intervals of 30
seconds or less to avoid overheating.
· User servicing is limited to cleaning. All other servicing must only be undertaken by
suitably qualified engineers.
· To avoid risk of fire, fuses must always be replaced with the same type and rating.
· The Kryo750Plus weighs approximately 40 kg and requires at least two people for safe
handling.
1.3.3 EMC precautions
The following precautions must be taken to ensure that the equipment is not damaged
by electrostatic discharge (ESD), and that its immunity to radio frequency interference
is not compromised.
· Ensure that the Controller is not running a program and that the mains power is
disconnected before connecting or disconnecting any cable.
· Fit the plastic covers and plugs provided to all unused connectors.
· Immediately before touching the sample PRT, touch an earthed part, such as the large
metal surface at the rear or underside of the freezer.
· Do not touch any uncovered connectors with your hands or tools, even when the
equipment is switched off.
· When connecting the system to a PC via the 9 way plug, always use a fully screened
cable no longer than 2m.
· Take care to avoid placing freezers in environments influenced by sources of
electromagnetic interference, such as cyclotrons, large transformers etc.
1.4 Indications for use
The Integra 750 Plus models are intended to be used for cooling biological samples,
following a defined temperature-time profile, as part of a cryopreservation process.

10
Introduction to the Integra 750Plus
1.5 About this Manual
Welcome to Integra 750Plus, a system that provides precision cooling and heating of
biological specimens.
This manual is aimed at Integra users; that is, people who are responsible for operating
or installing the Integra system.
The manual consists of a number of chapters and appendices:
· The remainder of this chapter, Chapter 1, gives a description of each of the major
components in the Integra system.
· Chapter 2: Installing the Integra 750Plus System is useful if you are installing
Integra for the first time.
· Chapter 3: Operating the Integra 750Plus System describes how to operate the
equipment.
· Chapter 4: Troubleshooting is useful if you experience difficulties with using or
setting up the equipment. If you have a problem, you should always refer to this
chapter before calling your supplier.
· Chapter 5: Addtional information
oIntegra 750Plus Specifications gives a full list of the Integra specifications,
including maximum temperature ranges, freezing rates, etc.
oSpare Parts gives a listing of Integra 750Plus parts, together with part numbers.
Refer to this section if you need to order new parts.
1.6 The Integra 750Plus components
The major components of the Integra 750Plus system are shown in the following
diagram.
16
24
34
38
38
40

11
Introduction to the Integra 750Plus
Figure 1.1 System components
1.6.1 The Integra 750Plus freezer
The Integra 750Plus freezer has many important design features:
Precision temperature control - Accurate linear cooling and heating is achieved by
the controlled injection of atomised liquid nitrogen into the chamber and the pulsing of a
heater. A fan and well-designed ducting ensure uniform circulation of nitrogen gas past
the specimens and a uniform temperature throughout the freezing chamber.
Precision temperature monitoring - The chamber temperature is measured by a
platinum resistance thermometer (PRT). Optionally, a second PRT can be used to
record the temperature of the samples. Both of these temperatures can be plotted on a
chart recorder and displayed as graphs within DeltaT.
Square freezing chamber - The large chamber makes the unit extremely versatile and
able to use many different types of chamber furniture in different orientations.
Top-loading or front-loading chamber - The chamber can be configured by a service
engineer to be accessible from either the top or front of the freezer. The front-
loading configuration, coupled with the large chamber, facilitates the freezing of blood
bags horizontally.
Stainless steel construction - The chamber and other parts are made from high-quality
stainless steel for durability and cleanliness.
Easy-to-clean chamber - The chamber can be easily removed for cleaning, and the
chamber temperature can be raised to +100 °C.

12
Introduction to the Integra 750Plus
Heated seals - To prevent icing, heated seals are provided between the chamber door
and body of the freezer.
Freezer furniture - A wide range of specimens can be frozen using a variety of
freezer furniture, including ampoule baskets and racks for straws or blood bags. The
freezer can hold up to four ampoule baskets, and each basket can hold up to 196
ampoules.
Internal programmable controller - The freezer's operation is controlled by an
internal microprocessor-based controller. The controller stores the program that
specifies start temperature, freezing rates, etc. in non-volatile memory. The program can
be retained in memory for several years, even if the freezer's power is disconnected.
You can load a new program by using the DeltaT software on a PC.
Stand-alone operation - The freezer can store a program from a PC and can run that
program independently of the PC.
Cool/heat switches - Push-button switches on the rear panel allow manual control of
the cooling and heating functions.
Safety features - The lid activates an interlock switch to switch off the heater, fan and
liquid-nitrogen solenoid valve when it is opened. Safety from overheating due to sensor
failure is provided by a thermal cutout. A relief valve set to 50psi (3.4bar) is fitted
on the input side of the solenoid valve.
1.6.2 Liquid nitrogen delivery system
It is normal to use a 22psi Dura-Lo or Dura-Tech cylinder to provide the supply of liquid
nitrogen to the freezer. The cylinder is filled by the supplier and, being self-pressurising,
does not require a pump to deliver the liquid nitrogen to the freezer.
Alternatively, a Planer 5psi dewar and pump can be used. The dewar contains the store
of liquid nitrogen, and the pump is inserted into the neck of the dewar. The pump
operates by energising a heater element immersed in the liquid nitrogen; this produces
gaseous nitrogen, which pressurises the dewar and forces liquid nitrogen along a
delivery tube to the freezer. The dewar needs to be filled manually.
It is preferable to use a 22psi cylinder rather than a 5 psi dewar, since it is physically
larger and therefore requires less-frequent filling. In addition, using a 5 psi dewar, the full
specified performance of the system may not be achieved and the rate of cooling during
a seeding pulse is reduced.
The principal components of the dewar and pump are shown in the following diagram.

13
Introduction to the Integra 750Plus
Figure 1.2 Dewar and pump
Although it is normal to use a Dura-Lo/Dura-Tech cylinder or Planer dewar, any liquid-
nitrogen supply that has a source pressure between 5 and 22psi may be connected
directly to the freezer.
Planer freezers must not be used with supply pressures in excess of 22psi.
1.6.3 Personal Computer (PC)
The optional DeltaT software on a PC enables you to create and store programs. You
can run one of these programs from the PC and view the recorded chamber and sample
temperatures graphically. All results from the run are stored on the PC for traceability
purposes.

14
Introduction to the Integra 750Plus
Any program you run from the PC can be stored in the freezer's memory (overwriting any
previously stored program) if the Make Permanent option is selected.. This enables you
to rerun the program directly from the freezer, without having the PC connected.
1.6.4 Printer
If you are using a PC, it is strongly recommended that you connect a printer. You can
use the printer for tasks such as printing programs and graphs.

Installing the Integra 750Plus

16
Installing the Integra 750Plus
2 Installing the Integra 750Plus
This chapter describes how to unpack and install the Integra 750Plus system.
If the door is configured for top opening, do not open it if you have turned the freezer so
that the door is to the side. The door has a powerful spring attached that allows it to be
opened easily when opened from the top, but when opened from the side, will cause it
to open VERY quickly and with a significant amount of force. Refer to Freezer lifting
instructions for further warnings
2.1 Preparation
The surface (e.g. a bench) on which the freezer is to be placed needs to be sturdy and
able to carry the weight of the freezer easily.
It is important to ensure that there is adequate airflow around the Integra for cooling
purposes. The underside of the freezer must be kept clear to ensure adequate airflow to
and from the motor and there must also be a gap of at least 40mm between the
Integra and any wall or other piece of equipment.
If you are using a bench, consider its location. If you are using a top-loading freezer, it is
important to pull the bench away from the wall, so that the freezer's rear panel can
overhang the bench to make it easier to replace fuses and access controls, etc.
If using a front-loading freezer, make sure that there will be sufficient room behind it for
you to access the rear panel.
Power sockets are required for the freezer, pump (if using a Planer dewar and pump),
chart recorder and PC (if using DeltaT). Ensure that sufficient power sockets are nearby.
2.2 Unpacking the equipment
The Integra is packed standing on its rubber feet in a cardboard tray, with its door
uppermost. A rectangular foam ring locates and protects the lower edges of the Integra
fibreglass casing, and the sides are protected by a cardboard sleeve. Foam strips
protect the upper corners of the Integra. Ground clearance is provided by two wooden
battens, which enable a small fork-lift truck to be used to transport the Integra, whilst in
its packing, to its intended place of use.
If the Integra is configured for front-loading it will be fitted with a metal foot labelled to
show that the system must not be operated in a top-loading position.
To remove the freezer from its packaging
1. Cut and remove the binding tape, then lift off the cardboard lid and remove the foam
corner protectors from the Integra casing. Lift the cardboard sleeve up and away from
the Integra.
2. Grasp the handle inset in the door of the Integra and turn it counter-clockwise until
the catch disengages. Lift the handle to open the door. This will require about 5kg of
force if the Integra is configured for use in the front-opening mode.
20

17
Installing the Integra 750Plus
3. Continue to lift the door until it is just beyond the vertical position, where it will
remain. Do not force or slam the door back on its hinge or allow the door to fall back
to the closed position, as personal injury or damage may occur.
4. Do not try to turn the door handle. An interlock in the door catch mechanism
prevents the handle from being returned to the closed position while the door is
open.
5. From inside the Integra chamber, remove the following items:
a. Operator's Manual
b. Liquid-nitrogen delivery hose
c. Mains supply cable Serial control cable Sample PRT
d. Exhaust-duct adapter
e. Inner chamber release key
f. Spare-fuse pack
g. Spare sealing-washer pack
6. Close the door and latch it by turning the handle clockwise.
7. Two persons, one at each end, are required to lift and position the Integra safely.
Slide the hands between the fibreglass casing and the lower protective foam to get a
grip on the base of the Integra, then lift it onto the bench or other place of use,
making sure that the door is facing upwards (even for front-loading freezers). The
door handle must not be used to lift the Integra.
8. Regardless of the intended operating configuration (front-loading or top-loading), it
should now be rotated to place its door to the front. This is to allow access to the
service panels for purpose of connecting electrical and liquid-nitrogen supplies. If the
Integra is configured for top-loading operation, a soft pad should first be placed on the
bench to prevent damage to the fibreglass casing.
Two persons, one at each end, are required to rotate the Integra safely. Grip a
rear foot and a top front corner of the Integra, then carefully lift and rotate the Integra
so that its door faces to the front of the bench. Place the rear edge of the freezer down
first, so that the hands at the front can be slid upwards to prevent them from being
trapped. Do not open the door of a top-loading freezer.
2.3 Installing the freezer
Remember: if the freezer has been configured for top loading, do not open its door until
the freezer is in the correct orientation.
If you wish to have the freezer modified for top or front loading, call the Service Engineer.
Do not attempt this operation yourself.
Connect the freezer
1. Check that the mains voltage rating shown on the back panel of the freezer correct
for local voltage value (115 or 230). If not correct, contact your supplier and do not
continue to install the freezer.

18
Installing the Integra 750Plus
2. Wrap the threads of the delivery tube (the tube that supplies liquid nitrogen to the
freezer) with PTFE sealing tape, then connect the tube to the 'T' connector on the
back of the freezer. Tighten the nut using a spanner. If required, the delivery tube can
enter the 'T' connector from the opposite direction; simply move the copper pipe
attached to the pressure-relief valve to the opposite side of the 'T' connector (ensuring
that the copper sealing washer is undamaged and in place) and tighten securely.
3. Connect the mains lead to the rear panel of the freezer, but DO NOT connect it to the
mains wall socket.
4. If the rear panel will become difficult to access in the freezer's final position, make
sure that the power switch on the rear panel is on (i.e. press '1'). Otherwise, switch
off the freezer, i.e. press '0'.
5. If appropriate, connect the serial cable (9F-9F one-to-one connections) between the
Serial Port on the rear panel to the PC's serial port, using a 9M-25w adaptor if
necessary. Retain the ESD cover for future use if the cable is subsequently
removed.
Rotate a top-loading freezer
7. If the freezer has been configured for top loading, it now needs to be lifted and rotated
into its correct orientation. Refer to Lifting Instructions at the end of this chapter.
Fit the sample PRT and exhaust elbow
8. Open the freezer's door and plug the sample PRT into the socket (hole) in the top
(front loading) or back (top loading) of the chamber.
9. Fit the plastic exhaust elbow adapter to the exhaust port on the right-hand side of the
freezer. Direct the exhaust gas to the rear of the freezer or connect the adapter to
your own exhaust ducting.
2.4 Installing a Dura-Lo or Dura-Tech
Cylinder
Use the following procedure if your system uses a Dura-Lo or Dura-Tech cylinder.
To install a Dura-Lo or Dura-Tech cylinder
1. Connect the delivery tube to the liquid-nitrogen tap by using an appropriate adapter,
and tighten securely, observing the manufacturer's instructions.
2. Wear gloves and goggles, then open the liquid-nitrogen tap slowly whilst checking for
leaks. Rectify as necessary.
2.5 Installing a Planer Pump and Dewar
Use the following procedures if your system uses a low-pressure Planer pump and
dewar. If required, refer to Figure 1.2 .
20
12

19
Installing the Integra 750Plus
Note If you use a different make of dewar, it may be necessary to fit an adapter ring
to its neck to actuate the microswitch. The lengths of the heater, feed tube and springs
may also need to be changed. If in doubt, consult your supplier.
2.5.1 Attaching the delivery tube
To attach the delivery tube:
1. Check that the freezer has its liquid-nitrogen delivery pipe securely fitted.
2. Support the pump carefully to avoid damage to the heating element near the end of
its inlet tube.
3. Fit the adaptor to the free end of the freezer's liquid-nitrogen delivery pipe and
connect it to the Planer pump, making sure that the fibre sealing washer is
undamaged and correctly positioned. Tighten the gland nut securely.
2.5.2 Putting liquid nitrogen into the dewar
To add the liquid nitrogen
1. Wear protective goggles, boots, gloves and an apron.
2. With the dewar on its platform, fully insert the tube from the storage container into
the dewar in order to reduce the risk of splashing.
3. Add the liquid nitrogen slowly to occupy between 50% and 85% of the total capacity
of the dewar. AVOID THE COLD GAS THAT ISSUES FROM THE DEWAR. Do not
overfill the dewar (above 85% of its capacity), otherwise spillage may occur when the
pump is inserted and there may be insufficient gas space to pressurise the dewar.
No material other than liquid nitrogen should be put into the dewar.
The use of a graduated dipstick is recommended to check the level of liquid nitrogen.
2.5.3 Fitting the pump
NEVER insert the pump into a dewar that contains liquid nitrogen, unless the delivery
tube is attached to the pump and freezer and the red pressure-release valve on the
pump is open.
1. Wear protective goggles, boots, gloves and an apron.
2. Ensure that the pump is disconnected from the mains wall socket.

20
Installing the Integra 750Plus
3. Open the red pressure-release valve on the pump.
4. Slowly insert the pump into the neck of the dewar, being careful to avoid the liquid
nitrogen splashing. It is normal for nitrogen gas to issue from the pressure-release
valve immediately.
If the pump is inserted too rapidly, the liquid nitrogen may bubble violently and may
spurt from the neck of the dewar. If this happens, withdraw the pump far enough to
stop the bubbling, then reinsert it more slowly.
5. While seating the pump, align it so that when fully inserted, it will be possible to clip
its springs onto the handles of the dewar.
6. Check that the microswitch plunger projecting from the underside of the pump
contacts the dewar neck or the collar fitted to it, and seat the rubber bung firmly and
evenly in the dewar.
7. Pressing firmly on the top of the pump to hold it level, clip all the springs onto the
dewar handles, alternating between handles to keep the side loading to a minimum.
8. Close the pressure-release valve.
9. If you are installing the integra system for the first time, connect the pump to the
power supply unit (PSU) under the platform.
10.Connect the PSU to a suitable mains wall socket using an appropriate cable. The
PSU end of the cable requires an IEC socket. The mains plug or socket must be
fitted with a fuse rated at 5A.
11.Press the switch on the PSU and the adjacent lamp will switch on. After about 5
minutes, the pressure-gauge reading will rise to 5psi and the lamp will switch off to
indicate that the PSU has switched off. Normally, the dewar will remain pressurised
until nearly empty.
12.Check for liquid and gas leaks, and rectify as necessary.
13.Position the dewar so that delivery pipe to the freezer runs as straight as possible
with no major high or low spots.
2.6 Freezer lifting instructions
Failure to follow these instructions could result in personal injury.
1. The freezer weighs approximately 40Kg. Lift using two people; one at either end.
If the freezer has a delivery tube or cables already attached, use a third person to
ensure that they do not become trapped, etc.
2. If the door is configured for top opening, do not open it if you have turned the freezer
so that the door is to the front. The door has a powerful spring attached that allows it
to be opened easily when opened from the top, but when opened from the front, will
cause it to open VERY quickly and with a significant amount of force.
3. If the door is configured for front opening, it is not spring- assisted and if you have
turned the freezer so that the door is to the top, it will appear very heavy. Take care
not to release the open door as it may cause injury or damage to the freezer as it
falls to the closed position.
4. Do not attempt to lift the freezer by using the door handle or exhaust port.