NEW BRUNSWICK SCIENTIFIC LN2, Manual To Operations

ix 

M1288-0056 

Š

 LN

2

 Backup Units for Innova & Premium Freezers 

User’s Guide 

TABLE OF CONTENTS 

1

INTRODUCTION..............................................................................................................................................1

1.1

S

COPE OF 

M

ANUAL

.....................................................................................................................................1

1.2

D

ESCRIPTION OF 

E

QUIPMENT

......................................................................................................................1

1.3

P

RODUCT 

S

PECIFICATIONS

..........................................................................................................................2

1.3.1

Dimensions ............................................................................................................................................2

1.3.2

Weight....................................................................................................................................................2

1.3.3

Performance ..........................................................................................................................................2

1.3.4

Gas Consumption ..................................................................................................................................3

1.3.5

LN

2

 Supplies ..........................................................................................................................................4

1.3.6

Electrical Supply Requirements.............................................................................................................4

1.3.7

Fuses......................................................................................................................................................4

1.3.8

Operating Environment .........................................................................................................................4

2

INSTALLATION ...............................................................................................................................................5

2.1

I

NSPECTION

.................................................................................................................................................5

2.2

I

NSTALLING 

I

NDIVIDUAL 

P

ARTS

..................................................................................................................5

2.2.1

Installing the Temperature Sensor.........................................................................................................5

2.2.2

Installing the Insulated Transfer Hose ..................................................................................................7

2.2.3

Installing the LN

2

 Valve/Injector Assembly ...........................................................................................7

2.2.4

Installing the LN

2

 Supply .......................................................................................................................8

2.2.5

Testing for Gas Leaks ............................................................................................................................9

2.2.6

Installing the Magnetic Door Sensor.....................................................................................................9

2.2.7

Installing the Control Unit...................................................................................................................11

3

OPERATION ...................................................................................................................................................13

3.1

G

ETTING 

S

TARTED

....................................................................................................................................13

3.1.1

Testing Gas Flow & Door Switch Operation ......................................................................................13

3.1.2

Testing Injector Valve & LED Operation............................................................................................14

3.1.3

Testing Backup System Operation .......................................................................................................14

3.1.4

Battery Backup ....................................................................................................................................15

3.1.5

Optional Remote Control.....................................................................................................................15

3.1.6

Alarm System Monitoring Socket.........................................................................................................15

4

MAINTENANCE .............................................................................................................................................17

4.1

LN

2

S

UPPLIES

............................................................................................................................................17

4.2

T

RANSFER 

L

INES 

&

M

ANIFOLD

.................................................................................................................17

4.3

C

ONTROL 

U

NIT 

&

E

LECTRICAL 

C

ONNECTIONS

.........................................................................................18

4.4

C

LEANING

.................................................................................................................................................18

4.5

B

ATTERY

...................................................................................................................................................18

4.6

R

OUTINE 

P

ERFORMANCE 

C

HECK

...............................................................................................................18

4.7

R

ETURN 

A

UTHORIZATION 

P

OLICY

.............................................................................................................18

5

SPARE PARTS ................................................................................................................................................20

6

SCHEMATICS.................................................................................................................................................21

6.1

LN

2

C

IRCUIT 

D

IAGRAM

/S

CHEMATIC

.........................................................................................................21