► Keep lines and cables away from hot surfaces (> 70 °C).
► Never fill or operate the unit with cleaning agents or cleaning agent residues.
► Do not carry out your own conversions or modifications on the unit.
► Observe the unit protection class prior to installation or operation in other environments.
► Provide suitable touch protection, if the surface temperature exceeds 70 °C.
2.4 Limits of use of the product
Parameter
Hena 201 R, Hena 251,
Hena 301 R
Installation location
● Indoors, protected against:
─ dust deposits
─ falling objects
─ fire-fighting water
● Outdoors, protected against:
─ falling objects
─ direct influence of weather such as rain, splash
water, strong drafts and sunlight
─ fire-fighting water
─ lightning strike
Installation altitude
max. 1000 m above sea level
At installation heights > 1000 m above sea level, the rated
power of the motor must be reduced or the ambient tem-
perature limited due to increased heating of the vacuum
pump.
Orientation
Horizontal
permissible angle of inclination
± 1 °
Ambient temperature with mineral-
based operating fluids (P3)
5+ °C to +35 °C
Ambient temperature with synthetic-
based operating fluids (D1)
+5
℃
to +40
℃
Relative air humidity
max. 85%
Pumped medium intake temperature,
max.
+80 °C
Permissible operating pressure range
during continuous operation
< 800 hPa
Exhaust pressure
Atmospheric pressure
Tbl. 3:
Limits of use of the product
2.5 Proper use
► Use the vacuum pump for vacuum generation only.
► When pumping media with an oxygen concentration level of ≥ 21 %, only use perfluorinated, syn-
thetic oils (F4, F5, A113) as operating fluid.
► Adhere to the installation, commissioning, operating, and maintenance instructions.
► Do not use any accessory parts other than those recommended by Pfeiffer Vacuum.
2.6 Foreseeable improper use
Improper use of the product invalidates all warranty and liability claims. Any use that is counter to the
purpose of the product, whether intentional or unintentional, is regarded as misuse, in particular:
● Pumping of corrosive media
● Pumping radioactive media
● Pumping of gases that introduce an ignition source to the suction chamber
● Pumping of gases that contain impurities such as particles, dust, or condensate
● Pumping of explosive media
● Pumping of media with a propensity to sublimation
● Pumping of fluids
● Use of the vacuum pump in potentially explosive atmospheres
Safety
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