Mounting; Hazardous Locations - TECHTOP NEMA Serie Instructions

ENGLISH FRANÇAIS

6. MOUNTING

Foot mounted motors should be mounted to a rigid
FOOT MOUNTED:
foundation to prevent excessive vibration. Shims may be used if the
location is uneven. Improper alignment may void the motor's warranty.
Flange mounted motors should be properly seated and
FLANGE MOUNTED:
aligned. Note: If improper rotation direction is detrimental to the load, check the
rotation or 'bump' the motor prior to coupling the load to the motor shaft.
Mount the sheave pulley close to the motor housing.
V-BELT DRIVE:
Allow clearance for end to end movement of the motor shaft. Do not over
tighten belts as this may cause premature bearing failure or shaft breakage.
Direct coupled motors should be carefully aligned
DIRECT COUPLED:
and the shaft should rotate freely without binding or drag.
Note:
Techtop Motors with frame 254T and larger are shipped with an
opposite drive end bearing lock. If front end bearing locks are desired,
please contact Techtop for assistance.

7. HAZARDOUS LOCATIONS

CLASS I (Gases, Vapors)
Group A: Acetylene
Group B: Butadiene, ethylene oxide, hydrogen, propylene oxide
Group C: Acetaldehyde, cyclopropane, diethel ether, ethylene, isoprene
Group D: Acetone, acrylonitrite, ammonia, benzene, butane, ethylene dichloride,
gasoline, hexane, methane, methanol, naphtha, propane, propylene, styrene,
toluene, vinyl acetate, vinyl chloride, xylem
CLASS II (Combustible Dusts)
Group E: Aluminum, magnesium and other metal dusts with similar characteristics.
Group F: Carbon black, coke or coal dust
Group G: Flour, starch or grain dust
Division 1:
In which ignitable concentrations of hazards exists, under normal
operating conditions and/or where hazard is caused by frequent maintenance or
repair work or frequent equipment failure.
Division 2:
In which ignitable concentrations of hazards are handled, processed or
used, but are normally in closed containers or closed systems from which they can
only escape through accidental rupture or breakdown of such containers.
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