COOK Laboratory Exhaust - Manual (Page 4)

2.2 Long-Term Storage
Long-term storage is considered to be any period longer than six (6) months from date of shipment. If long-term
storage is anticipated, contact the Loren Cook sales office at time of order entry for the proper instruction for
long-term storage. It is mandatory that a detailed record be maintained during this long-term storage period,
including, but not limited to, proper sealing of the cabinet, rotation of the blowers and bearings and protection of
all motors from moisture. Note: Under certain conditions, it may be necessary to remove the motors from the
unit and/or add heat to the motor. This record must be available to Loren Cook should a failure occur during
the warranty period. There is a time limit of one year from date of shipment that any unit may be kept in long-
term storage. At the end of the one year period, the unit must be in operation.
Note: Failure to perform the long-term storage requirements and properly log these required
procedures will void the warranty.
3.0 Air Filters
Loren Cook utilizes the nominal 2 inch pleated 30 % efficiency filter as the primary filter. It is also used as a
pre- filter in conjunction with high efficiency filters. This filter is installed in two types of filter racks. Filter
quantities are selected to meet certain air flow and pressure drop requirements, which appear on the
submittal sheets under static pressure analysis.
3.1 Slide Type Filter Rack
This type filter rack, as the name implies, utilizes two horizontal channels in which the filters are captured
between. The racks could be provided in a V, W or flat configuration. The filters are loaded into the frame
through a removable side plate, or on the face, where a portion of the channel side has been removed.
Frequently, spacers are used to make up the difference between the length of the rack, which is governed by the
opening size and the length of standard size filters.
3.2 Type 8 Style Frames (Standard)
This individual sized frame surrounds each filter and is grouped
together to form the desired filter area. The frame is provided in 24
”
x 24 ” and 12” x 24” sizes. The type 8 frame accommodates a
variety of filters ranging from the standard 2 inch filter, to full size, or
header type high-efficiency filters and/or a combination of pre and
high-efficiency filters. In addition to the above, some high efficiency,
or special purpose filter frames may be incorporated into the
equipment. These filter frames may vary greatly in design and style
of loading. Loren Cook provides manufacturer
’s data sheets with
the equipment.