4
Installation
Installation
Operating Instructions – Explosion-Proof VARIMOT
®
Variable Speed Gear Units and Accessories
17
4.6
Installation
• The variable speed gearmotor may only be mounted or installed on a level
1)
, vibra-
tion-damping and torsionally rigid support structure. Do not tighten housing legs and
mounting flanges against each other.
• Carefully align the variable speed gear drives to avoid overloading the output shafts
(observe permitted overhung loads and axial forces).
• Do not hit or hammer the shaft end.
• Ensure an unobstructed cooling air supply and that air heated by other apparatus
cannot be drawn in and reused. The cooling air may not exceed a temperature of
40 °C (104 °F).
Installation in
damp locations
or outdoors
• VARIMOT
®
gear units are supplied in corrosion-resistant versions (version B) for use
in damp areas or outdoors. Any damage to the coating (e.g. on the breather valve)
must be repaired.
Cable entry,
cable gland
• All
cable entries
are provided with ATEX certified plugs.
• To establish the
correct cable entry
, the plugs are replaced by
ATEX certified
cable glands with strain relief
.
• Select the cable gland according to the outer diameter of the cable used.
• All
non-required cable entries must
be sealed
with an ATEX certified plug after
installation is completed.
• Coat the threads of cable glands and filler plugs with sealing compound and tighten
them well – then coat them again. Properly seal the cable entry.
• Properly clean the sealing surfaces of the terminal box and terminal box cover before
reassembly. Replace brittle gaskets.
Painting the
gear unit
If all or some of the surfaces of the drive are to be painted, make sure that you carefully
mask over the breather valve and the oil seals. Remove the strips of tape after com-
pleting the painting work.
1
Maximum permitted flatness error for flange mounting (approximate values with reference to DIN ISO 1101):
with
Æ
flange 120 ... 600 mm max. error 0.2 ... 0.5 mm
•
VARIMOT
®
version HS (handwheel with position indication) must be mounted
so that the adjusting spindle is horizontal; otherwise the position indication
will not function properly.
•
The breather valves must be easily accessible. The plastic plug of the conden-
sation drain hole at the lowest position must be removed before operation
(danger of corrosion).
