Door Operation; Remote Alarm (Optional) - Thermo Scientific TSX Series Installation And Operation Manual

7.7 Door Operation

7.8 Remote Alarm
(Optional)
Thermo Scientific
The doors on all units are designed to stay open if opened 90 degrees or more.
The door spring tension cannot be adjusted.
If the self-closing door does not work properly, make sure the unit is level.
Door seal integrity is critical for unit's performance. Never route anything
through the door seal. A loose fitting gasket allows moist air to be drawn into the
cabinet, resulting in quicker frost buildup on the evaporator coil, longer running
time, poor temperature maintenance, and increased operation cost.
CAUTION: Keep hands and body parts clear of closing doors. The moving
parts create a potential pinch point.
WARNING: Risk of Fire. There are port holes in the walls of the cabinet to
help facilitate routing of tubing, independent temperature sensors, and
other non-electrical items. The ports are not intended to supply power to
devices inside the device. Be sure to seal the holes after routing items to
prevent undesired air exchange.
All units have factory-installed local alarm contacts that can be used for remote
alarm systems.
The maximum distance between a freezer and a remote alarm depends on the
wire gauge used. Refer to Table 4 below:
Table 4. Wire Gauges and Distance to Remote Alarm
Total Wire Length
Wire Gauge
(feet)
20 530
18 840
16 1330
14 2120
12 3370
Remote alarm terminals are located at the rear of the machine compartment. The
three terminals are: COMMON, OPEN ON FAIL (Normally Closed), and
CLOSE ON FAIL (Normally Open).
TSX -20°C Flammable Materials Storage Laboratory Freezers
Distance to Alarm 1/2
Wire Length (feet)
265
420
665
1060
1685
Installation
17