GAYLORD CG Series Technical Manual page 10

"RG" SERIES VENTILATOR PRINCIPLE OF OPERATION
INTERNAL FIRE MODE (CONTINUED)
On thermostatically activated systems, the water will run until
the thermostat cools below 280°F (138°C), and then continue
for a 5 minute cool down cycle. The water may be shut off prior
to the end of the 5 minute cool down cycle by pushing the
"Cancel" button located inside the electrical compartment of
the control cabinet. After the water has shut off, the dampers
can be reset by pulling the reset handle on the damper control
switch (Refer to Figure 11), and the exhaust fan(s) restarted by
pushing the "Start Fan" button on the Command Center.
FIG. 11
DAMPER CONTROL SWITCH
MODEL C-61-GXSH-RG
USED WITH THERMOSTATICALLY
ACTIVATED SYSTEMS
EXTERNAL FIRE MODE
A break glass type fire switch is optional and if provided, would
normally be located at the exit of the kitchen. Pulling the fire
switch shuts off supply fan and starts the exhaust fanif it was
off, releases fire smothering water spray into the interior of the
ventilator, and the "Fire" light on the Command Center
flashes. During this time, the fire damper remains open, and
the exhaust fan remains on to help remove smoke, heat, etc.
If the fire intensified and the fuse link or thermostat reach
280°F(138°C), the fire damper would then close and the
exhaust fan would shut off.
To resume normal operations, open the fire switch and flip the
toggle switch to the position marked "normal". (Refer to Figure
12) Replace the glass rod and close the cover.
FIG. 12
BREAK GLASS FIRE SWITCH
C-1357A SERIES
TESTING INTERNAL FIRE MODE
The internal fire protection system may be tested periodically
by pushing the "Fire Test Switch" which is located inside the
electrical compartment of the control cabinet. Pushing this
switch will cause the following:
Thermostatically Activated
1. Water turns on and
will run for 5 minutes.
2. Exhaust fan shuts off.
3. Damper closes.
4. Fire light illuminates.
CAUTION: Before pushing the "Fire Test Switch", check to
see if the internal fire protection system is tied to the building
alarm system.
TO RESUME NORMAL OPERATION
1. To discontinue the 5 minute cool down cycle at any point
during the cycle, push the "Cancel" button located inside
the electrical compartment.
2. Reset all damper control switches, if thermostatically
operated.
3. Push the "Start Fan" button on the Command Center.
SURFACE FIRE PROTECTION
The Gaylord Ventilator may be equipped with surface fire
protection either dry or wet chemical, or the Gaylord Quencher
System. In the event of a fire, the surface fire protection
system would normally be activated and discharged prior to
the ventilator's internal fire protection. These systems may be
intertied with the ventilator control cabinet to activate the
External Fire Mode. If the fire is unusually severe or the surface
fire protection system malfunctions, the ventilator's internal
fire protection system would activate, thus providing a second
level of defense.
FIRE
QUENCHING
WATER SPRAY
DRAIN LINE
8
Fuse Link Activated
1. Water turns on and
will run for 5 minutes.
2. Exhaust fan shuts off.
3. Fire light illuminates.
FIRE DAMPER IN CLOSED POSITION
MELTED 280°F FUSE LINK
HINGED INSPECTION
DOOR
(OPTIONAL) SURFACE
FIRE PROTECTION
NOZZLE
FIG. 13
FIRE CYCLE