13
7.7 Door Operation
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.
7.8 Remote Alarm (Optional)
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
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).
Figure 8. Remote Alarm Diagram
Wire
Gauge
Total Wire Length
(feet)
Distance to Alarm
1/2 Wire Length (feet)
20
530
265
18
840
420
16
1330
665
14
2120
1060
12
3370
1685
