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Remote Alarm
All units have factory-installed remote alarm contacts that can
be used for remote alarm systems. The maximum distance
between a unit and a remote alarm depends on the wire
gauge used. Refer to Table 4 below:
The Remote alarm contacts are located on the right side of
the header panel. The three terminals are: COMMON, OPEN
ON FAIL (Normally Closed) and CLOSE ON FAIL (Normally
Open).
Table 4. Wire Gauge and Distance to Remote
Alarm
Wire
Total Wire
Gauge
Length (feet)
20
530
18
840
16
1330
14
2120
12
3370
To install the remote alarm, make the following connections:
1. Connect the COMMON terminal on the cabinet switch to
the COMMON wire on the alarm.
2. To get an alarm when the switch contacts open, connect
the OPEN ON FAIL terminal on the cabinet to the OPEN
ON FAIL wire on the alarm.
3. To get an alarm when the switch contacts close, connect
the CLOSE ON FAIL terminal on the cabinet to the
CLOSE ON FAIL wire on the alarm. The COMMON and
CLOSE ON FAIL wires must be tied together in this
application.
4. Plug the alarm system service cord into an electrical
outlet.
5. The contacts will trip in the event of high temperature
alarm or low temperature alarm.
Final Checks
Before start up, be sure to complete the following steps:
1. Make sure that the unit is free of all wood or cardboard
shipping materials, both inside and outside.
2. Ensure that the shelves are positioned in the desired
location.
3. Verify that the unit is connected to a dedicated circuit.
14 |
Installation
Distance to Alarm 1/2
Wire Length (feet)
265
420
665
1060
1685
General Purpose and Chromatography Refrigerators
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