Section 2: INSTALLATION
2.10 INTRODUCTION
2.11 This manual has been compiled not only for the care and maintenance of the Welch Dry
Vacuum Pump now in your possession, but as a helpful reference and guide to prevent many
problems which occur if used improperly
2.20 UNPACKING
2.21 Carefully remove the Vacuum Pump from the shipping case and unfasten and remove the
wooden skid. 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
Technology, be sure to include your order numbers for quick identifi cation. Do not return the
pump to the factory without fi rst calling for a return goods number.
2.30 PUMP
MOUNTING
2.31 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.
All Vacuum Pumps should be mounted on a horizontal plane.
2.40 PUMP LOCATION / ENVIRONMENTAL CONDITIONS
2.41 Pump
Location:
The Vacuum Pump should be located preferably in a clean, dry, and well ventilated area.
Please be sure not to block the ventilation holes located on the motor housing. 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. Welch recommends that the pump be installed at the highest point within the
system to prevent possible water condensate from entering the pump. The pump should be
located as closely to its system in order to utilize it most effi ciently.
2.42 Pump Environmental Conditions:
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 temperatures up to 31°C decreasing
to 50% at 40°C. Rated for +/-10% of supply voltage. Pollution Degree 2, Installation Category
II.
WARNING
Don’t pump fl ammable or explosive gases or vapors or operate this
pump in an atmosphere containing fl ammable or explosive gases or
vapors.
2.50 INTAKE AND DISCHARGE PROVISIONS
2.51 The
intake
fi tting is a NW25-fl ange / 1/4”NPT. A muffl er is supplied for the exhaust.
WARNING
Bursting Hazard- use on exhaust port the silencer or air handling
parts suitable for pressures not less than 100 PSIG
Be sure to call Welch technical service prior to start-up at (847) 676-8800 if you have any questions.
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