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Document No. U028837 • 01-26-2022
Page 3 of 8
The Model ZN-RES Residential Flush Pendent Sprinklers must only be installed and utilized in accordance with the
following described criteria, which are provided by the manufacturer.
D E S I G N C R I T E R I A
Figure 2:
Operation Process (For illustrative purposes only)
Normal Condition Sprinkler Operation Water Discharge
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 specifications which are more stringent and which take
precedence over those specified in NFPA 13, NFPA 13D, NFPA 13R, or by the authority having jurisdiction.
The spray from the sprinkler is distributed radially outward and downward from the sprinkler deflector. 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 defined 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 ZN-RES. The sprinkler must be secured in position by firmly 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 ZN-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 ZN-RES, due to the exposure of a heat source other than an actual fire.
