Snap-On Dual 3412, User Manual

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1-6
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Control Knob
Use to select Vacuum, Off, or Recycle.
Compressor Power Switch
Turns recovery compressor on and off. Must be on (I) for unit
operation.
Unit On Indicator
Lights when power cord is connected to A.C. power.
Compressor On Indicator
Lights when compressor is running.
High Pressure Indicator
Lights when recovery tank pressure is above 300 psi. Tank
pressure above 300 typically means non-condensable gas
should be vented from recovery tank. For additional information
refer to
Chapter 2–Purging Non-condensable Gas
.
Tank Full Indicator
Lights when recovery tank weight reaches 40 pounds.
Overload Indicator
Lights when compressor approaches a stall condition. End
procedure in process to prevent compressor damage when
overload indicator lights.
Temperature Display
Shows recovery tank temperature. Use this along with
pressure/temperature chart on front panel when purging non-
condensable gas. For additional information refer to
Chapter
2 – Purging Non-condensable Gas
.
Pressure Gauge
Shows recovery tank pressure. Use this along with
pressure/temperature chart on front panel when purging non-
condensable gas. For additional information refer to
Chapter
2 – Purging Non-condensable Gas
.
Purge Button
Use when purging non-condensable gas from recovery tank.
For additional information refer to
Chapter 2 – Purging Non-
condensable Gas
.
LCD Display
Shows charged, recovered amounts or gross weight of recovery
tank. Also Indicates software version, “Tank Full” and “Tank
Empty” conditions.
B — Moisture Indicator
Shows moisture level in recycled refrigerant. When moisture
indicator changes color, master filter maintenance is required.
For additional information refer to
Chapter 3–Master Filter.