Grease Extraction/Smoke Removal - GAYLORD CG3-UVi-SPC Series Technical Manual

Chapter 2 - Principle of Operation, Page 2-2__________________________________________________

Grease Extraction/Smoke Removal

Overview
The Gaylord "CG3-UVi-SPC" Series Ventilator extracts up to 95% of the grease, dust and lint particles
from the airstream passing through it, when operated and maintained in accordance with design
specifications. This high rate of grease extraction is accomplished by the use of grease extraction
baffles, Particulate Separators and UV lamps and ESP Cells. The following describes the function of each.
Grease Extraction Baffles
When the exhaust fan is started the hot, grease-laden air rising from the cooking surface merges with
the higher velocity air that wipes the front of the cooking equipment and extends, like an air blanket, from
the front edge of the cooking equipment to the air inlet slot of the Ventilator. As the air moves
through the V entilator's extraction chamber at a high speed, it is forced to make a series of turns
around three baffles. As this high velocity air turns around each baffle, the larger particles of grease are
thrown out of the airstream by centrifugal force and collected on the baffles. The extracted grease,
dust and lint are collected in the interior of the ventilator, remaining out of the airstream until
removed daily by the Wash Cycle.
Baffle #1
Important Note: The following description of Baffle #1 is for the standard CG3-UVi-SPC series
Ventilator. For operation of Baffle #1 for series FDL, FDT, FDD, and ND refer to TableT-2-15-1).
This baffle, located at the air entrance of the ventilator, is a three position damper. Position #1
is the Exhaust Mode as shown in Figure 2-3 -1 , position # 2 is the Wash Cycle M ode as shown
in Figure 2-9-1, and position # 3 is the F ire M ode as shown in Figure 2-15-1. When the START
FAN button is pushed on the Command Center, the damper opens to the exhaust mode position
#1 to become the preliminary grease extraction baffle.
collecting gutter on the back side of the damper which drains off liquefied grease to one end of the
Ventilator, preventing it from re-entraining into the airstream.
Baffle #2
This baffle is located on the interior back wall of the ventilator and is a stainless steel pipe,
equipped with brass spray nozzles on 8" to 10" centers (Refer to Figure 2-3-1). During the wash
cycle, hot detergent water is released through the nozzles.
Baffle #3
This baffle is located on the back of the inspection doors (Refer to Figure 2-3-1). This baffle is also a
grease collecting gutter, collecting the grease extracted by the ventilator preventing the contaminants
from dropping back into the high velocity airstream.
Optional Custom Air Baffles
Some Ventilators may be equipped with optional Custom Air baffles, shown dotted, which reduces
the exhaust volume where the baffles occur (Refer to Figure 2-3-1).
Particulate Separator
Once the larger particles of grease have been captured through inertial impaction by the baffles, the
smaller particles will be arrested in the Particulate Separator using the principles of diffusion and inertial
impaction (Refer to Figure 2-3-1). These collected particles will be washed away each day by the Wash
Cycle.
There is a small sloped grease