Operation
18 Installation and Operation Manual
Thermo Scientific Cryogenic Storage Freezers
•
The Backup System Empty Indicator lights when the standby LN
2
bottle is empty.
Figure 3.
Location of LN
2
Connection Site
24.75"
2.375"
LN
2
Inlet Conn.
Copper Tubing
Factory Supplied
0.625" O.D.
MACHINE COMPARTMENT
REAR VIEW
Table 1-1.
Backup System Flow Rates – Cryogenic Freezers
Lbs/hr @ 75×F Ambient Temperature (Flow Rate)
Center Air Temperature
-150×C
-140×C
-130×C
-120×C
Liquid LN
2
Chest Freezers
7 ft
3
Empty
1/2 Full
Full
11.3
9.7
7.8
10.0
8.6
6.8
9.0
7.6
6.0
8.0
6.8
5.2
10 ft
3
Empty
1/2 Full
Full
15.2
12.0
8.9
13.5
10.4
7.8
11.9
9.4
7.0
10.3
8.3
6.1
