switches] [rollover floor treadle] [as indicated]. Electric power
operators shall be complete with an electric motor, brackets, controls,
limit switches, magnetic reversing starter, and other accessories
necessary. The operator shall be designed so that the motor may be removed
without disturbing the limit switch timing and without affecting the
emergency operator. The power operator shall be provided with a slipping
clutch coupling to prevent stalling of the motor. Operators shall have
provisions for immediate emergency manual operation of the door in case of
electrical failure. Where control voltages differ from motor voltage, a
control voltage transformer shall be provided inside as part of the
starter. Control voltage shall be 120 volts or less.
a.
Motors. Drive motors shall conform to NEMA MG 1, shall be
high-starting torque reversible type, and shall be of sufficient
output to move the door in either direction from any position at
the required speed without exceeding the rated capacity. Motors
shall be suitable for operation on [[120] [208] [277] [480] volts,
60 Hz] [[220] [240] [380] volts, 50 Hz], [single] [three] phase,
and shall be suitable for across-the-line starting. Motors shall
be designed to operate at full capacity over a supply voltage
variation of plus or minus 10 percent of the motor voltage rating.
b.
Controls. Each door motor shall have an enclosed reversing
across-the-line type magnetic starter with thermal overload
protection, limit switches, and remote control switches. The
control equipment shall conform to NEMA ICS 2; enclosures shall
conform to NEMA ICS 6, and shall be Type 12 (industrial use), Type
7 or 9 in hazardous locations, or as otherwise indicated. Each
wall control station shall be of the three-button type, with the
controls marked and color coded: OPEN - white; CLOSE - green; and
STOP - red. When the door is in motion and the stop control is
pressed, the door shall stop instantly and remain in the stop
position. From the stop position, the door shall be operable in
either direction by the open or close controls. Controls shall be
of the full-guarded type to prevent accidental operation.
2.5.6.3
Leading Edge Safety Shutdown
Leading edges of the door with operators shall have a safety shutdown
switch strip the entire length of the leading edge. The safety strip shall
be press-at-any-point ribbon switches. Activation of the strip shall shut
down the operator and release the door with reset required to continue door
operation.
2.5.7
EM Shielded Door Factory Test
**************************************************************************
NOTE: When specifying nonlatching doors, delete
door static load and sag tests and cycle test for
door latches. Retain cycle test for door hinges.
**************************************************************************
Test data shall be provided on at least one shielded door of each type
provided for the facility to verify that the EM shielded doors of the
design supplied have been factory tested for compliance with this
specification. Test doors shall not be furnished on the project. Test
data reports shall be submitted in accordance with paragraph SUBMITTALS.
SECTION 13095A
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