Robinair SPX 700 Recovery Recycling Unit Owners Manual - Enlarge page 1 
From inside (document excerpt):
TM Recovery / Recycling Unit Combines Simple Operation with Superior Accuracy The Cool-Tech 700 recovers, recycles, evacuates and recharges R-134a quickly and accurately. Built-in the new “sidewinder ” cabinet, it combines proven technology with the latest in time-saving features. Automatic operation means less attention is needed! Automatic Refrigerant Refill — With this latest advance, you never have to stop in the middle of a job to change refrigerant tanks.
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The unit maintains 12 to 15 pounds of refrigerant in an internal vessel, and signals when it’s time to change the supply tank so no monitoring is required. Automatic Air Purge — Eliminates damaging air without any monitoring of gauges or opening of valves. Automatic Oil Drain — The unit automatically drains system oil captured during recovery, and the display reminds you to empty the bottle. Calibrations on the container clearly show you how much oil needs to be replaced. Accuracy features eliminate guesswork! Electronic Scale — The scale is mounted internally for protection and has a dampening mechanism that protects against impact shocks such as movement over rough surfaces. The scale weighs recovered refrigerant and charges by weight for greatest accuracy. Internal Storage Vessel — Refrigerant is recovered into and charged out of this vessel, which is permanently mounted to the electronic scale for continuing reliability. Internal Manifold — A Robinair exclusive, this block manifold contains all the solenoids that control refrigerant flow, reducing the possibility of leaking connections. Model 34700-2K Recovery, Recycling, Evacuation and Recharging for R-134a Specifications Voltage 115V 60 Hz Refrigerant Container On-board 30 lb (14 kg) vessel (source tank not included) Operating Range 50° to 120°F (11° to 49°C) Recycling Filter-Drier 43 cu. in. spin-on type Pump Free Air Displacement 6 cfm (142 L/m) Dimensions 52 ” H x 33 ” W x 20 ” D (132 cm x 83.8 cm x 50.8 cm) Weight 180 lbs (81.65 kg)