www.senjusprinkler.com Document No. U028705 • 01-26-2022
Page 3 of 7
The Model HF-RES Residential Flush Horizontal Sidewall Sprinklers must only be installed and utilized in accordance with
the following described criteria, which are provided by the manufacturer.
DESIGN CRITERIA
Notes
Residential Fire Sprinkler Systems should only be designed and installed by those component and completely familiar with
automatic sprinkler system design, installation procedures, and techniques. Several criteria may apply to the installation and
usage of each sprinkler. Consequently, it is recommended that the sprinkler system designer review and develop a working
understanding of the complete list of criteria prior to initiating the design of the sprinkler system.
Questions concerning sprinkler installation and usage criteria, which are not covered by the following instructions, should be
submitted to your contracted company. Include sketches and technical details, as appropriate.
In some instances, the requirements of this document may concern specications which are more stringent and which take
precedence over those specied in NFPA 13, NFPA 13D, NFPA 13R, or by the authority having jurisdiction.
The spray from the sprinkler is distributed outward and downward from the sprinkler deector in a semicircle. Consequently,
the sprinklers must be located such that there will not be any blind spaces shielded from spray by partitions, room dividers,
overhangs or other parts of the dwelling structure.
The number of sprinklers within each compartment (as dened by NFPA 13D, 13R, or 13) must be kept as few as possible while
observing all guidelines relating to obstructions and spacing.
Use only the escutcheon provided with the Model HF-RES. The sprinkler must be secured in position by rmly fastening the
sprinkler system piping to the structure. If the sprinkler is not properly secured in position, reaction forces resulting from
sprinkler operation could alter its orientation and its water distribution pattern.
The sprinkler escutcheon cannot be used to hold the sprinkler in position.
Obstruction to Water Distribution
Locations of sprinklers must follow the obstruction rules of NFPA 13, 13D and 13R for Residential Sprinklers.
General Service Conditions
The Model HF-RES must only be utilized in wet pipe sprinkler systems.
Heat Source Criteria
Refer to NFPA 13D, 13R or 13 for the requirements relating to the prevention of possible activation of the Heat Responsive
Element of Model HF-RES, due to the exposure of a heat source other than an actual re.
Precautionary Warnings for Corrosive Environments
The Model HF-RES sprinklers should not be installed where they may be subjected to a corrosive environment including
the following:
1. Chlorine ion and Chloride environment
Stress corrosion cracking may be caused by exposure to environments with Chlorine ion and Chloride. Exposure to
this environment may result in sprinklers operating under non-re conditions or not operating when exposed to an
actual re.
2. Sprinkler system piping with Copper
Sprinkler systems should be constructed in compliance with the applicable standards and the requirements for
copper piping when copper piping is used in the sprinkler system. (Reference standards NFPA 13, ASTM B813, ASTM
B828, and CDA (Copper Development Association) – Solder Joint)
All residual ux must be removed from the interior and exterior of the copper piping by thoroughly ushing before
installation of the Sprinkler Heads. Otherwise, residues of ux may cause corrosion and/or leakage in the sprinkler
system.
