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MV & LV SERIES ENGINEERED DRY CHEMICAL FIRE EXTINGUISHING SYSTEM
OPERATION, DESIGN, & SERVICE MANUAL
REV C
Document # DOC324
Issued: April 26, 2018
Revised: March 22, 2022
UL FILE # EX27541
Section 4 System Installation
4 SYSTEM INSTALLATION
e installation of the Janus Fire Systems® Engineered Dry Chemical Fire Extinguishing System should
be undertaken by competent mechanical and electrical technicians familiar with NFPA 17 and with the
installation of dry chemical systems who have reviewed this manual and all hazard drawings and calculations.
No special tools are required to assemble the equipment.
A complete hazard analysis and system design, including a drawing of the system layout, must be completed
before the installation of any system and submitted to the authority having jurisdiction (AHJ). e design,
drawings, and material list should be compared with conditions found on site. Cylinder size and agent fill
must match design calculations. Temperature and humidity of the area must be within system limitations
and room integrity must be consistent with the initial design. All components should be inspected for
shipping damage.
Materials such as piping, pipe hangers, fittings, tubing, conduit, and mounting hardware are not typically
supplied by Janus Fire Systems. ese items are to be supplied by the installer and must meet the minimum
required material specifications found in this manual, NFPA 17 - Standard on Dry Chemical Fire
Extinguishing Systems, NFPA 72 - e National Electrical Code, as well as local building and fire codes
or local norms.
System equipment has been verified through testing to function in ambient temperatures ranging from
-40°F (-40°C) to 130°F (54°C). Flow calculations have been verified at ambient temperatures of 70°F ±10°
(21.1°C ±5.5°). Storage outside of the range of 70°F ±10° (21.1°C ±5.5°) may result in inaccurate flow
calculations and cause one or more nozzles to not discharge the designed quantity of dry chemical agent.
Discharge of an unsecured cylinder may result in injury, death, or damage to property from violent
cylinder movement or over-exposure to high concentrations of agent.Thecylinderisttedwithananti-
recoil safety plug or device to protect against violent cylinder movement during accidental discharge. Do not
remove the anti-recoil safety device from the discharge outlet until the cylinder is securely mounted in the
bracket and the cylinder is ready to be connected to the discharge piping system. Do not transport the cylinder
unless the anti-recoil safety device is in place. Handle the cylinder assembly with care even when the safety
device is in place.
Do not install the electric, manual, or pneumatic valve actuators until all cylinder straps, pipe, and nozzles are
securely installed. Failure to comply could result in accidental discharge of the cylinder. Remove the electric,
manual, and pneumatic valve actuators before transporting cylinder.
Do not apply excessive force to the low-pressure supervisory switch or pressure gauge or attempt to carry the
cylinder assembly or cylinder valve by the low-pressure switch or pressure gauge. If the low-pressure supervisory
switchorpressuregaugebreaksatthetting,agentwilldischargethroughtheportpotentiallycausingpersonal
injury or property damage.
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