6
Section 2: INSTALLATION
2.10 Environmental
Conditions
The Pump is rated for indoor use only. Maximum altitude 2000 meters. Operating temperature
range 10
o
C to 40
o
C. Maximum relative humidity of 80% for temperatures up to 31
o
C decreasing
to 50% at 40
o
C. Rated for +/-10% of supply voltage. Pollution Degree 2, Installation Category
II.
2.11 Introduction
This manual has been compiled not only for the care and maintenance of the Welch Dryfast
Vacuum pump now in your possession, but as a helpful reference and guide to prevent many
problems which can occur if used improperly.
2.12 Unpacking
Carefully remove the Dryfast Vacuum pump from the shipping case. 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 pump to the factory without obtaining returned goods
authorization. *See “Service & Support” on www.welchvacuum.com.
2.13 Pump
Mounting
Rubber feet are attached to the pump casing.
2.14 Pump
Location
WARNING
Don’t operate this pump in an atmosphere containing fl ammable or
explosive gas
WARNING
The motor is thermally protected and will automatically restart
unexpectedly when the overload device resets
The Dryfast Vacuum pump should be located preferably in a clean, dry and well ventilated
area. Please be sure not to block the ventilation ports located on the motor housing. The pump
should be placed where the surrounding temperature remains between 10
o
C and 40
o
C (50
o
F
and 104
o
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 in order to utilize it most
effi ciently.
