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SECTION IV

UL EX-4510 12-1-01 Page 4-1

Planning for design and installation for an INERGEN system
should start when the customer is first contacted in regards
to protecting his hazard with INERGEN. Most of the infor-
mation gathered for the design of a system is collected dur-
ing the first meeting with the customer. The information
gathered at this point will determine the ease or difficulty of
the rest of the project. One of the key elements for fire pro-
tection is to correctly define the hazard and conduct a com-
plete survey to determine if the system will properly protect
the hazard. Coordination with all parties involved in the pro-
ject will further improve the flow of the overall project.

A thorough hazard analysis is required to determine the
protection required. It is important to cover each element
and accurately record the information. This information will
be used to determine the size and location of the INERGEN
system required and also to determine at a later date if any
changes were made to the hazard after the system was
installed. Information necessary for design of an INERGEN
system is listed in the following paragraphs.

A Proposal Information Form, F-9355, is included in the
appendix of this manual to assist in a hazard analysis of the
protected areas.

Initial General Information:

• Are Specifications available? If so obtain a copy.

• Who is the “Authority Having Jurisdiction”? the owner?

• Will the system need to be approved by any other regula-

tory or insurance agencies?

• Will any special requirements apply to the system design

or installation?

Hazard Information:

• Secure the general arrangement drawings of the areas to

be protected.

• If the general arrangement drawings do not include the

following information then you must obtain it.

• Record all dimensions for the hazard areas such as

length, width, ceiling height, angles of corners if not 90
degrees, etc.

• Draw a sketch including plan and elevation views of the

hazard area if drawings are not available.

• Indicate the quantity and locations of all exits from the

hazard on the sketches.

• Record all dimensions for any structural objects such as

beams or columns, built in cabinets, ducts, etc. which
may allow a reduction of the hazard volume.

• Identify anything unique about the hazard that would

affect system design or installation.

• Identify the hazards normal, maximum, and minimum

ambient temperatures.

• Will the hazard area be normally occupied?

• Identify any openings, or potential openings in the hazard

enclosure that may cause loss of agent during or after
discharge.

• If possible, determine the maximum strength of the weak-

est wall, floor, or ceiling. This information will be used to
calculate venting requirements. If this information is not
available, a conservative number will be used to calculate
the required free venting area. This conservative number
will probably increase the size of venting required.

Planning

ANSUL