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Section 2: INSTALLATION
2.10 Introduction
This manual has been compiled not only for the care and maintenance of the Welch Dry
Vacuum System now in your possession, but as a helpful reference and guide to prevent many
problems which can occur if used improperly.
2.11 Unpacking
Carefully remove the Dry Vacuum System from the shipping carton. Preserve all paperwork for
future reference. If damage has occurred from shipment a claim must be fi led with the carrier
immediately; preserve the shipping carton for inspection by the carrier. If you are required to
communicate with your dealer or Welch Vacuum be sure to include your order numbers for
quick identifi cation. Do not return the system to the factory without fi rst calling for a returned
goods number. Call (847) 676-8800.
2.12 System Mounting
Rubber feet are attached to the pump. Rubber feet are excellent for applications involving a
semi-fl exible surface such as a bench top; they help to isolate noise and eliminate creeping.
2.13 System Location and Environmental Condition
The Dry Vacuum System should be located in a clean, dry and well ventilated area. Do not to
block the ventilation ports located on the metal shell. The pump should be placed where the
surrounding temperature remains between 10°C and 40°C (50°F and 104°F). Always check
to insure the location chosen is protected from direct or indirect moisture contact. The pump
should be located as closely to its system as possible in order to utilize it most effi
ciently. The
pump is rated for indoor use only. Maximum altitude 2000 meters. Operating temperature
range 5°C to 40°C. Maximum relative humidity of 80% for temp up to 31°C decreasing to 50%
at 40°C. Rated for ±10% of supply voltage. Pollution Degree2, Installation Category II.
WARNING
Don’t operate this pump in an atmosphere containing fl ammable or
explosive gases or vapors
WARNING
The motor is thermally protected and will automatically restart
unexpectedly when the overload device resets
2.14 Inlet and Outlet Provisions
A inlet hose barb which accepts 3/8” I.D. hose makes it easy to connect the system to your
concentrator, rotary evaporator or gel dryer. Since the vacuum system operates in the viscous
fl ow regime, the small diameter of the hose will generate minimal conductance loss. For best
results, Welch recommends the length of the tubing between the pump and the apparatus be
kept as short as possible. Hose clamps should be used to hold the hose in place. The hose
barb in the outlet port of the pump accepts 3/8” ID hose. A vent line can be attached to the
outlet hose barb which allows gases and vapors pumped through the pump to be piped to a
fume hood. Be sure to call Welch technical service prior to start-up at (847) 676-8800 if you
have any questions.
WARNING
Never Block The Outer Port. If the outlet is blocked, pressure will
buildup in the pump which can lead to the pump head bursting creating
the potential of serious injury. Remove plug from outer port
Содержание WELCH 2567B-01
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