CBS V1500AB - V Series Manual Fill Instructions

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The unique design of the new Isothermal Storage Unit is such that it is no longer
necessary to ll the storage chamber with liquid nitrogen. Instead, the inner walls of the storage
vessel are lled with liquid nitrogen and the storage chamber holds no liquid at all. Because of
this unique design, the manual lling of this equipment is very dierent from storage units of
the past. Use the following instructions to manually ll the Isothermal Storage unit in the event
of a power outage or if the auto-ll is not working properly.
For the correct manual lling of the Isothermal unit perform the following steps:
1. Turn o the liquid nitrogen supply valve at the supply tank.
2. Disconnect the supply line from the Isothermal Unit at the port on the back of the unit.
3. Remove the cap from the manual ll port, also on the back of the unit.
4. Place the cap on the auto-ll port where the supply line was connected, and tighten down.
5. Connect the liquid nitrogen supply line to the manual ll port, and tighten down.
IMPORTANT: It is not recommended to attempt to manually ll the Isothermal Storage
Unit by opening the lid and placing a ll line over the edge into the vessel. This is an incorrect
ll method and will cause liquid nitrogen to come in contact with the stored samples.
CAUTION: Before opening the supply valve to ll the Isothermal Unit, read the
following text to learn how to gauge the liquid level, so the Storage Unit does not
overll and create hazardous conditions.
V SERIES MANUAL FILL INSTRUCTIONS
AUTO-FILL
CONNECTION
MANUAL-FILL
CONNECTION
Without power there will be no digital display to give the liquid level, and the liquid
cannot be seen visually since it is contained inside the walls of the Isothermal Unit. Thus the lid
must remain open during the manual ll process. With this in mind, the best way to gauge the
ll level is when the tank is nearing maximum ll, liquid nitrogen will begin to “spray” from the
vents located near the top edge of the inner walls of the vessel. When this is seen, the supply
valve should be shut o immediately before excessive amounts of liquid nitrogen begin to spill
into the storage space.