Installing The Remote Alarm Connector; Intended Use - Thermo Scientific TSX Series Installation And Operation Manual

Pressure Equalization Port
When an upright ultra-low temperature freezer door is
opened, room temperature air rushes into the storage
compartment. When the door is closed, the fixed volume of
air is cooled rapidly. Pressure drops below atmospheric
pressure, resulting in a substantial vacuum. Re-entry into the
cabinet is impossible until internal pressures are returned to
atmospheric pressure. Without a pressure equalization
mechanism, it can take, in extreme cases, several hours
before the door can easily be reopened.
All upright models feature a port that provides vacuum relief
after door openings. The pressure equalization port is located
in the door behind the eye-level panel on the front of the
freezer. Although the port is designed to self-defrost,
excessive frost accumulation on the inner door could
eventually restrict air flow. Therefore, you should periodically
inspect the inner door and brush away any loose frost using a
stiff nylon brush.
Installing the Remote
Alarm Connector
The remote alarm contacts are located behind the freezer
above and to the left of the power switch. After installing the
wiring from the remote alarm to the connector, install the
connector to the freezer micro-board.
The pin configuration is shown in Figure 2:
Figure 2. Remote Alarm Pin Configuration
The contacts will trip in the event of a power outage, high
temperature alarm, low temperature alarm or door ajar alarm.
Ultra Low Temperature Freezers

Intended Use

The –86°C freezers (refer Models for the specific model
series) described in this manual are high performance units for
professional use. These products are intended for use as cold
storage in research use and as a general purpose laboratory
freezer, storing samples or inventory at operating
temperatures between –50°C and –86°C.
It is not considered a medical device and has therefore not
been registered with a medical device regulatory body 
(e.g. FDA): that is, it has not been evaluated for the storage of
samples for diagnostic use or for samples to be reintroduced
to the body.
This unit is not intended for use in classified hazardous
locations nor to be used for the storage of flammable
inventory.
Installation | 9