Warner Electric ER-1225 - Manual (Page 4)

4 Warner Electric • 800-825-9050 819-0466
Installation Instructions for ER-825 &
ER-1225 BRAKES With Pin drive
Important: Please read the following cautionary
notes before starting installation . The permanent
magnets used in this brake which determine
its unique features and operation also demand
special consideration when installing and
operating it . Read the following carefully:
The brake consists of an
armature and magnet. The magnet includes
permanent magnets which will strongly
attract any magnetic material toward it.
Keep the magnet at least 1/2 inch away from
any magnetic material, including a steel
workbench. If the magnet must come closer
than 1/2 inch to any magnetic material, keep
all body parts clear of the possible contact
area to avoid injury. Magnetic attraction can
be overcome by applying approximately 90
volts DC to the size 1225 magnet.
To prevent accidents, follow
the proper KONE Inc. instructions to lock
the escalator in place when installing or
replacing a brake.
Each brake is preburnished
at the factory & shipped with its mated
components. Do not exchange armature or
magnet with any other brake as the non-
mated components may produce less than
rated torque and may cause the escalator to
fail. When either component is replaced, the
complete brake must be replaced.
If the magnet mounting surface
is magnetic material, the magnet must be
isolated approximately 1/4 inch from that
surface with a plate or spacers of non-
magnetic material. This helps to reduce stray
magnetic force (flux) which may impair the
brake’s operation.
In order to minimize stray flux, the brake should
be as exposed as possible or, if enclosed, it
must be placed in a housing of non-magnetic
material such as 302-304 stainless steel or
aluminum .
The mounting pilot diameter must be
concentric to the shaft within .010” T .I .R The
magnet mounting surface must be square with
the shaft within .006” T .I .R ., measured at the
bolt circle . The spacer or mounting adapter used
in installation of the brake must be machined to
tolerances specified above .
New armatures shipped from
the factory are flat to within 0.005 inches
and must stay flat within this tolerance to
maintain full torque. Any attempt to pry the
armature loose from the magnet will distort
the armature. When adjusting the armature
position, apply any required force only to the
hub, not to the outer edge of the armature.
Moreover, be careful not to drop the
armature for this may also cause distortion.
For proper operation of the
brake, apply only DC voltages. If AC power
is ever applied to the brake, the magnets will
set partially demagnetized and the brake will
have to be replaced.
The positive & negative of the power lead must
be connected to positive & negative lead wires or
terminals of the brake, respectively .
Heat: Excessive heat and high operating
temperatures are causes of rapid wear . Air should
circulate around the unit as freely as possible,
especially if the application requires fast, repetitive
cycling .
If a choice of armature shaft material exists,
it should be non-magnetic . Materials such as
type 302-304 stainless have been used very
successfully .
Please follow these
instructions carefully to ensure proper
operation. Failure to comply with these
instructions can result in damage to property
and injury or even death to personnel.