Norlake KOLD LOCKER Manual De Instalación página 20

W -I M
ALK N AINTENANCE
WALK-IN MAINTENANCE
SWEEP GASKET
The sweep gasket was factory installed and tested for proper
operation before shipment. It features a unique cross-section
designed to not only seal the gap between the bottom of the
walk-in door and the threshold or building floor, but its off-set
configuration closes an opening that is normally created at both
ends of a conventional sweep gasket. It is attached to the lower
edge of a walk-in door assembly with 3/4" pan head sheet metal
screws and flat washers.
The sweep gasket extrusion consists of three distinct durometers
(hardness) of vinyl extruded in a one-piece profile. The rigid area
forms the attachment section. The flexible portion forms the
sweep projection and provides the end seal and an extremely
flexible lip that contacts the threshold or building floor, depending
upon the installation.
OPERATION
As soon as the door opening sequence begins, the cam-lift
hinges begin raising the door and the sweep gasket releases
its contact with the threshold or building floor. At approximately
90º from the face of the walk-in, the door will reach the "hold
open" position and will no longer rise by cam action. The sweep
gasket will be lifted about 3/8" above the threshold or building
floor. When in the closed position, the extremely flexible lip of
the sweep gasket should merely brush the threshold or building
floor along its entire length.
ADJUSTING THE SWEEP GASKET
(Initial Installation)
With the door COMPLETELY CLOSED, the proper distance between the bottom of the rigid attachment area of the
sweep gasket and the threshold or building floor MUST BE 1/2".
If this dimension is less than 1/2", the sweep gasket will wear prematurely and will produce excess friction for the
door closer to act against during the door closing sequence.
If this dimension is greater than 1/2", the lower lip will not contact the threshold or building floor and the seal will
be compromised, permitting air infiltration to occur in this area. Measure both ends of the sweep gasket with the
door closed and adjust until exactly 1/2" is attained.
ADJUSTING THE SWEEP GASKET (Normal Wear)
After considerable usage, if examination reveals that the lower lip of the sweep gasket has worn to a point where
noticeable air infiltration is occurring, merely loosen the attachment screws and the lower the gasket only enough
to permit the lower lip to brush the threshold or building floor while the DOOR IS IN THE CLOSED POSITION. Do
not lower the gasket more than is necessary! Tighten the attachment screws and check the operation.
© 2008 Nor-Lake 4/08 PN 121428
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