Unit installation

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Spring Air System Enviro Engineering Manual 01/035
5
Every KESF unit is equipped with a backward Inclined; AMCA rated, Class II, exhaust fan with
heavy-duty bearings, and two groove sheaves. The following options are also available:
The KESF fan unit is always internally isolated. The KESF fan unit has spring mounted isolators
inside the KESF fan unit and does not require any external flexible connection outside the unit.
The KESF fan unit has a Class II: The Class of the fan is dependent on the total static pressure
and CFM of the system. The Class II blower will handle up to 7.5” W.C. total static pressure.
Single Width, Single Inlet (SWSI) or Double Width, Double Inlet (DWDI): The standard unit
comes with a DWDI fan package. The DWDI is preferred when the exhaust discharge is straight
through the KESF Fan unit. The DWDI can also discharge up or down from the KESF fan unit
but not out the sides. DWDI exhaust fans up to 8,000 CFM are stocked at the Spring Air factory.
The SWSI fan is preferred if the exhaust discharge from the KESF Enviro fan unit is required to
be at right angles (Out the Side) to the exhaust discharge.
Odor Spray or Odor Pellets or NONE: Odor reduction is required if the exhaust discharge is to
be located in an area where the smell could be a nuisance. The choice of Pellets or Spray is a
personal preference. The Pellets are generally changed once a year while the Spray bottle is
changed every one to two months.
The Pellets are contained in 24” x
24” x 2” and 12” x 24” x 2”
perforated cells located in a
separate odor reduction section
normally located between the KES-
ISH filter box and the KESF fan
box. There are no moving parts
and the odor reduction is
continuous. All of the exhaust air is
drawn over the pellets whenever
the fan is operating. The cells are
removed through a side access
door on the odor section. The cells
split in two to remove the used
pellets and add new pellets.
Remote Pellet Odor Reducing Unit (Model OP40 Shown)
Figure 6
The Spray system contains a spray compressor, nozzle, associated piping, and odor spray
container. The timer control is located in the remote panel. The spray unit is located in the KESF
fan unit or in a separate remote unit. When the spray unit is located in the KESF fan unit the
wiring is completed by Spring Air. If a remote odor spray unit is used a 120V/1/60 interlock from
the KESF section is required. While the exhaust fan is operates the spray is cycled every 0 to 10
32.00
5.00
25.00
5.00 3.00
25.00
8.25
50.50 34.00 34.00
8.25
30" CLEARANCE REQUIRED
ON THIS SIDE
40.00
EXHAUST
OUTLET
OUTLET
EXHAUST EXHAUST
INLET
EXHAUST
INLET