Lincoln Electric Prism 4, Operator'S Manual

Page: 37 / 80

C-2
ACCESSORIES
PRISM® L SERIES THERMAL SUPPRESSION
SYSTEM OVERVIEW
The Prism indirect low pressure
thermal suppression system uses an
extinguishing agent commonly known
as ABC Dry Chem. It is a finely divided
powder that has been treated to be
water repellent and capable of being
fluidized and free flowing so that it can
be discharged through hoses and piping
under the influence of expellant gas.
The unit utilizes a UL recognized
component (per UL standard 521), a
Linear Heat Detector known as Firetrace
Automatic Fire Detection Tubing, which
when pressurized with Dry Nitrogen, will
allow the fire suppression valve to
remain in the closed position. This
tubing acts as a continuous linear
thermal detector that ruptures upon
direct flame impingement or at
temperatures above 212°F when
pressurized to 195 psi. Once the
detection tubing is ruptured, the valve
automatically opens, allowing the ABC
dry chem agent to flow through the
discharge piping, distributing the extin-
guishing agent through the nozzles into
the protected volume.
When the system’s smoke detector is
activated or the detection tubing is
ruptured, the integrated controls quickly
shut down the fan and close the two
dampers to create a protected volume.
A LED strobe light provides visual
notification of any system discharge.
The stack light also gives visual
feedback on any system malfunction as
detailed in the Operations and
Diagnostics section.
The thermal suppression system
components are identified on page C-2.
Detection Tubing Upper Suppressant
Discharge Nozzle
Smoke detector (mounted indoors or
outdoors on exhaust/return air duct).
Dual fan units supplied with two
detectors - one for each fan exhaust.
Discharge
Switch Control
Warning/Diagnostic Light
(mounted indoors)
Main Control Panel
(mounted indoors)
Bypass Control
(mounted indoors)
Lincoln Smart Connect Modules
(mounted indoors)
Detection Tubing pressure
gauge/charge port
Lincoln Smart
Connect Module
Suppressant
Tank
Suppressant
Discharge
Hoses
Supply Air/Inlet
Damper
Lincoln Smart
Connect Module
L17587-12, L17587-13, L17587-14, L17587-15, L17587-16,
L17587-17, L17587-18, L17587-24, L17587-25, L17587-26,
L17587-27, L17587-28, L17587-35, L17587-37
PRISM ®
®