Greenheck Fire Ready Hood - GRRS - Manual (Page 23)

23 Fire Ready Hood
After an Actuation
The fire suppression system must be recharged and
restored to service immediately after any discharge for
continued fire suppression protection.
Clean-Up Procedures
Due to the alkaline nature of the fire suppressing agent,
kitchen surfaces must be cleaned immediately after
system discharge. The wet chemical agent discharged
produces a foamy by-product that can be wiped up with
a cloth or sponge.
Clean-up procedures are as follows:
1. Before clean-up ensure that all fuel or electrical
sources to the equipment to be cleaned have been
shut off. Unplug exhaust hood and all appliance
electrical controls to avoid any chance of electrical
shock resulting from the cleaning process or from
an electrically conductive liquid agent.
2. Discard food and cooking oil that has contacted the
extinguishing agent since it is no longer suitable for
consumption.
3. Wipe up as much of the agent as possible with
paper towel or disposable rags.
4. Use hot, soapy water to clean away all residue and
any surfaces that the agent has come in contact
with.
5. Completely dry all areas before continuing the
service procedure.
Inspect the Unit for Damage
Be sure no components of the hood were damaged
from fire/heat.
Determine Cause of Discharge
Determining the reason for the system discharge before
recharging the fire suppression system and resetting the
unit is critical to ensure either the system performed as
designed, or was caused by a component malfunction.
Great care has been taken to simplify field installations,
so system malfunctions should be extremely rare.
• A fire may have caused the fusible links to melt,
causing the system to discharge. In case of fire,
inspect the electrical system and all wiring for heat
damage.
• The remote pull station (optional) may have been
pulled.
• If fusible links have not been changed within the past
12 months, they may have stretched and released the
actuation cable.
WARNING
• Safety glasses and gloves must be worn for all the
following operations. Flush thoroughly with clean
water if agent comes in contact with skin or eyes.
• Allow time for cooling before attempting any
cleaning. Using water to clean any appliance that
contains hot grease or cooking oils, may result in
violent steaming or splattering.
How to Reset the Suppression System
Resetting and testing release mechanisms, remote
pull, and fusible links.
Reset detection system by completing the following
steps:
1. Remove extinguisher tank
2. Make sure tension arm cable is in the released slack
position.
3. Remove the 3 fusible links from the cable assembly
and replace links with 2 new properly rated links
and one test link at terminal end.
4. Return tension arm and cable mechanism to a
cocked position.
5. Using wire snips, cut the test link at the terminal end
to simulate an actuation.
6. If system actuates successfully, go to Step 8.
7. If the release mechanism does not actuate, check
the following components and remedy any disorder
as follows:
a. Check the detector links for correct positioning
through pulleys in system and for possible twists
or knots in the cable
b. Ensure that actuator arm is in place and is
cocked.
c. Retest the system after installing a new test link
on the terminal end.
d. Verify that safety pin is removed from suppression
tank. If problems persist call the factory at 1-800-
371-6858.
8. Upon successful actuation of the system, complete
the following steps:
a. Release cable from actuation lever and install a
properly rated fusible link in the terminal location.
b. Replace extinguisher tank and reattach cable to
actuation lever to place it into its “ready” position.
Recharge Tank
1. Placing the hood into the service position allows for
removal of tank and examination of components.
2. Disconnect the tank pressure switch and the hose
discharge assembly connection and remove the
tank from the hood. It is recommended to replace
the pin back into the tank in case of left over
suppression media.
3. Remove the tank valve assembly and inspect the
valve and O-rings for damage. Thoroughly flush the
valve and O-ring with water.
4. Once flushing is complete, refill the tank with
the measured amount in the recharge and refill
kit, screw on valve assembly, and recharge with
nitrogen to a pressure of 100-105 psi (green zone on
pressure gauge).
5. Reinstall tank and ensure all systems have been
thoroughly checked and retested with new links.
The system can now be put into service.
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