User's Manual

Design

P/N 81-CO2MAN-001 3-53 September 2013

3-8 MULTIPLE HAZARD SYSTEMS

When two or more hazards are reasonably close together, it may be desirable to use one

central supply of carbon dioxide and to utilize directional valves to route the agent to the

required area. In such an arrangement, the amount of agent shall be at least sufficient for the

largest single hazard or group of hazards being protected simultaneously.

Directional valves are normally set in the closed position. When a fire is detected, the

directional valve leading to the fire location is opened to allow agent to flow to that area.

It is strongly recommended to provide a reserve agent supply. Reference Paragraph 3-11.2 for

additional information.

Since the directional valves will remain open until reset, the system is capable of protecting

only one hazard at a time, regardless of whether a reserve agent supply is provided. Therefore,

it is vitally important to accurately determine which hazard areas are completely separate,

such that fire will not spread from one area to another. Where the spread of fire from one

hazard to another is possible, both areas must be protected simultaneously.

All closed sections of pipe (i.e., upstream of any directional valves) shall be fitted with a Safety

Outlet (Part No. 81-803242-000).

From Paragraph 3-6.1.3:

= 30

= 0.5 min.

= 1.4 x

= 1.4 x 0.5

= 0.7 min.

= 

= 300  0.7

= 428.6 lb./min.

liq

min