APPLICATION METHOD (Continued)
Total Flooding (Continued)
STEP NO. 26 – Revise the Design Worksheet (Optional)
This step is to be completed only if the designer is complet-
ing the INERGEN Design Worksheet manually; the
INERGEN Designer program automatically revises the
Design Worksheet after a flow calculation is completed.
Rework the design worksheet for each area starting with
the entry for “Actual INERGEN Agent Supplied Per Area,
Step No. 10,” and ending with “System Discharge Time,
Step No. 15.” Replace the “actual INERGEN agent supplied
per area” with the agent quantities determined in the
“Nozzle Performance” section of the flow calculation pro-
gram.
STEP NO. 27 – Verify Actual System Performance
Once a flow calculation has been completed and the
Design Worksheet has been revised (optional), it is impor-
tant that the designer review all results to verify system per-
formance. The INERGEN Designer program will flag most
errors and prevent a completed flow calculation until they
have been corrected. However, this does not guarantee that
the systems performance will match what the designer
expects. Careful review is an important step in the design of
any Fire Protection system, which must be completed
before final approval of the system.
Review the revised worksheet to verify that:
1. The agent concentration at maximum temperature is
within acceptable limits (34.2% to 52% for occupied
spaces).
2. The agent quantity is above the amount required in the
Initial INERGEN Quantity box (see Step No. 7).
3. The discharge time from the flow calculation is equal to
or less than that listed for all areas on the Design
Worksheet.
STEP NO. 28 – Determine the Pilot Cylinder
Requirements
After all flow calculations have been completed, refer to the
following table, “Pilot Cylinder Requirements Table”, to
determine if additional pilot cylinders are required in the
system.
Proper backpressure actuation of the INERGEN cylinder
valves requires that the manifold reach a prescribed mini-
mum pressure. If this minimum pressure is not achieved in
the manifold, only the cylinder operated by the electric actu-
ator will open. This will result in a system discharge which
will not allow enough agent to the hazard enclosure, which
may prevent achievement of the proper minimum design
concentration and result in the failure to suppress a fire.
The pilot cylinder requirements identified on the “Pilot
Cylinder Requirements Table” allows pressure from the
electric actuator to operate as many pilot cylinders as nec-
essary to assure that the manifold reaches a pressure high
enough to open all cylinders attached to that manifold.
Example
(Estimated Pilot Cylinder Requirement)
System Flow Rate = 736 CFM
(1) Pilot Cylinder Required
SECTION V
UL EX-4510 12-1-01 Page 5-10
Design
