Instruction Manual

Page 2
BEFORE USING THE RHS780
Check for any shipping damage. Place a claim with carrier if damage is discovered. DO NOT USE A DAMAGED UNIT.
Complete and return the Warranty Card to activate technical support service and warranty coverage.
These general instructions describe normal operation and maintenance situations encountered with the RHS780.
Failure to read and comply with these instructions or any one of the limitations noted herein can result in serious injury
and/or property damage.
A few minutes spent reading these instructions can make an operator aware of dangerous practices to avoid and
precautions to take for his own safety and the safety of others. The instructions should not be interpreted to anticipate
every possible contingency.
The RHS780 should not be operated or serviced by any person who has not read all the contents of this manual.
It is the responsibility of the owner/user to operate the RHS780 in accordance with all specifications and laws which
may apply.
A regular schedule of inspection of the RHS780 should be established and records maintained with special attention
given to Hoses, Vacuum Pump Oil Level, and Filters.
SAFETY PRECAUTIONS
Recover, Recycle, and Charge only the refrigerant for which the machine is configured.
Wear safety glasses and protective gloves. Refrigerant has a very low boiling point and can cause frostbite.
Follow the RHS780 operating procedures sequentially to avoid prematurely disconnecting hoses or opening valves
which may release refrigerant to the atmosphere.
Do not expose the RHS780 to moisture or operate in wet areas.
Use the RHS780 in locations with mechanical ventilation that provides at least four air changes per hour.
Hoses used with the RHS780 must have shutoff devices within 12 inches (30 centimeters) of the connection point to
the A/C System to minimize the introduction of Non-Condensable Gas (Air) into the RHS780 and the release of
refrigerant when being disconnected.
Disconnect power before performing any maintenance or service on the RHS780.
Connect the RHS780 to a properly grounded receptacle. Do not over load the circuit.
Avoid using an extension cord with the RHS780. If necessary use a good condition three wire, grounded, #14 AWG
(2.0 mm
2
) or larger extension cord of the shortest possible length.
Do not connect the RHS780 to the liquid side of any A/C System with a capacity greater than 4 lbs (1.8 Kg.)
Refrigerant in A/C Systems having larger capacities must be recovered from the vapor side only.
Never connect the Red or Blue Hose on the rear of the RHS780 to the Liquid Port of a Cylinder of Refrigerant to fill
the Charge Cylinder. Doing so may cause the Compressor to fail and void the warranty.
Avoid breathing refrigerant or lubricant vapor or mist. Exposure may irritate eyes, nose and throat. If accidental system
discharge occurs, ventilate work area before continuing.
Additional health and safety information may be obtained from refrigerant and lubricant manufacturers.
Special Considerations with R134a
R134a has been shown to be nonflammable at ambient temperature and atmospheric pressure. However, tests under
controlled conditions have indicated that at pressures above atmospheric and with air concentrations greater than 60
percent by volume, R134a can form combustible mixtures.
While it is recognized that an ignition source is also required for combustion to occur, the presence of combustible
mixtures is a potentially dangerous situation and should be avoided.
Under no circumstances should any equipment be pressure tested or leak tested with Air and R134a mixtures. Do not
use compressed air (shop air) for leak detection in R134a systems.