Benchmark Platinum-Edge: Operation-Service Manual
SECTION 4 – INITIAL START-UP
OMM-0137_D • GF-211
•
7/16/2019
Technical Support
•
(800) 526-0288
•
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4.7 OVER-TEMPERATURE LIMIT SWITCHES
The unit contains two configurable over-temperature limit controls, positioned behind the unit’s
front panel, under the Edge Controller:
•
Automatic Reset
: If the unit’s operating temperature exceeds the limit set on the switch,
the unit goes into an alarm mode and shuts the unit down. When the temperature falls
10 degrees below the limit, the unit automatically resumes operation without operator
intervention. The limit range is manually adjustable from 32°F to 200°F (0°C to 93°C).
The default value is 190°F (88°C).
•
Manual Reset
: If the unit’s operating temperature exceeds the limit set on the switch,
the switch goes into an alarm mode and shuts the unit down. The unit
cannot be
restarted until the switch is reset
manually
. The limit is preset to 210°F (98.9°C) and
should not be changed
.
Note the following points:
•
Both switches display the temperature to which the switch is set (the temperature limit),
not
the actual temperature it is reading.
•
Both switches can display temperatures in Fahrenheit or Celsius.
•
The
Auto-Reset
switch is preset to 190ºF (88°C), but can be adjusted as needed to
suite local conditions, as described below.
Figure 4-11: Over-Temperature Limit Switches
4.7.1 Adjusting the Automatic Reset Limit Switch Temperature
Perform the following steps to adjust the Automatic Reset Limit Switch temperature setting.
Temperature Adjustment Instructions
1. Power the unit
ON
and remove the front panel to expose the Over-Temperature Limit
switches.
2. Press the Automatic Reset Limit Switch’s
SET
button:
SP
appears in the display.
3. Press the
SET
button again. The current setting stored in memory is displayed.
4. Press
the ▲ or ▼ arrow buttons to change the display to the desired temperature setting.
5. When the desired temperature is displayed, press the
SET
button
6. Press both the
SET
and ▼ arrow buttons together at the same time. This step stores the
setting in memory.
MANUAL RESET
SWITCH
AUTO-RESET
SWITCH
