Internal Fire Protection - GAYLORD CG Series Technical Manual

WASH CYCLE
The wash cycle is activated each time the exhaust fan is shut
off by pushing the "Start Wash" button on the Command
Center or, if equipped with optional time clock ("TC" Series), as
programmed on the clock. The "Wash On" light is illuminated
each time the wash cycle comes on, and hot, detergent
injected water is released into the interior of the ventilator for
the time set on the wash timer.
This hot detergent water washes the day's grease, dust and
lint accumulation from the interior of the ventilator flushing it
down to the main gutter which slopes to the pre-flushed drain
which leads to the building drain system. Spray nozzles are
located on 8" to 10" centers on the wash pipe mounted on the
interior back wall of the ventilator. (Refer to Figure 9) At the
end of the wash cycle, the water is automatically shut off, and
the interior of the ventilator is clean - ready for the next day's
operations.
There are three standard wash cycle times that are set
depending upon the type of cooking equipment being used.
The settings are 3 minutes for light-duty equipment, 5 minutes
for medium-duty equipment, and 9 minutes for heavy-duty
equipment. However, adequate cleaning is dependent upon
water pressure, water temperature, daily grease accumula-
tion, the length of the wash cycle, frequency of wash cycle and
the type of detergent being used. It may be necessary to
increase the wash time to the next higher setting to achieve
proper cleaning.
COMMAND CENTER
MODEL C-5000
SERIES
VENTILATOR CONTROL CABINET
MODEL GPC-5000 SERIES
INTERNAL FIRE MODE
The ventilator is equipped with a spring loaded fire damper
located at the duct collar. The internal fire protection system
is automatically activated whenever the fuse link or optional
electrical thermostat reaches 280°F (138°C). Upon activa-
tion the following occurs:
1. The fire damper closes — stopping the combustion-
supporting, natural draft through the ventilator. (Refer
to Figure 13)
2. The exhaust fan serving the ventilator is shut off,
stopping the combustion-supporting, mechanically in-
duced draft. The supply fan is also shut off.
3. Fire-smothering water spray is released into the interior
of the ventilator through the cleaning system.
4. The "Fire" light on the Command Center illuminates.
"RG" SERIES VENTILATOR PRINCIPLE OF OPERATION
FIG. 8
On fuse link activated ventilators, water will continue to run
until it is shut off by the hand valve located inside the
ventilator control cabinet. The fire damper must then be
reset by replacing the fuse links. IMPORTANT NOTE: All
replacement fuse links must be UL Listed and rated for 280°F
(138°C).
The hand valve may then be reopened and the exhaust fan
may then be re-started by pushing the "Start Fan" button on
the Command Center.
HOT DETERGENT
WATER SPRAY
SPRAY
NOZZLES
DRAIN LINE
AUTOMATIC WASH CYCLE
DAMPER CONTROL SWITCH
MODEL C-61-GXB-RG
USED WITH FUSE LINK
ACTIVATED SYSTEMS
7
FIRE DAMPER
HINGED INSPECTION
DOOR
FIG. 9
FIG. 10