13-60 INSTALLATION OF SPRINKLER SYSTEMS
8.4.4.3 Each section shall have a 1 Y. in. (32 mm) drain on the tion device, and the conditions of 8.6.3.5 are not met, piping
system side of each check valve supplemented by a dry pipe and valves shall be installed as illustrated in Figure 8.6.3.1.
system auxiliary drain. 8.6.3.2* Where the connection between the antifreeze system
8.4.4.4 Section drain lines and dry pipe system auxiliary drains and the supply piping incorporates a backflow prevention
shall be located in heated areas or inside heated cabinets to device, and the conditions of 8.6.3.5 are not met, piping and
enclose drain valves and auxiliary drains for each section. valves shall be installed as illustrated in Figure 8.6.3.3 or Figure
8.4.5 Time Limitation.
8.6.3.4.
8.6.3.2.1 A means shall be provided to perform a full forward
8.4.5.1 The sprinkler system shall be so constructed and the flow test in accordance with 16.14.5.
number of sprinklers controlled shall be so limited that water
shall reach the farthest sprinkler within a period of time not 8.6.3.3* Where the connection between the antifreeze system
exceeding 1 minute for each 400 ft (120 m) of common feed and supply pipe incorporates a backflow prevention device,
main from the time the heat-responsive system operates. and the conditions of 8.6.3.5 are not met, a listed expansion
8.4.5.2 The maximum time permitted shall not exceed
chamber shall be provided to compensate for thermal expan
3 minutes. sion of the antifreeze solution as illustrated in Figure 8.6.3.3.
8.4.6 System Test Connection. The end section shall have a
system test connection as required for dry pipe systems. Filling cup
8.5 Multi-Cycle Systems.
8.5.1 All multi-cycle systems shall be specifically tested and
listed as systems.
8.5.2 All multi-cycle systems shall be installed in compliance
with the manufacturer's installation instructions.
8.6* Antifreeze Systems.
8.6. 1 * General.
8.6. 1 . 1 The use of antifreeze solutions shall be in conformity
with state and local health regulations.
8.6. 1.2 Antifreeze shall not be used in ESFR systems unless the
ESFR sprinkler is listed for use with the antifreeze solution.
8.6. 1 .3* Where pendent sprinklers are utilized, the water shall
be drained from the entire system after hydrostatic testing with Drain valve
water. Notes:
8.6. 1.3.1 The requirements of 8.6.1.3 shall not apply where 1 . Check valves are permitted to be omitted where sprinklers are
the system is hydrostatically tested with a listed antifreeze solu below the level of valve A.
tion. 2. The %2 in. (0.8 mm) hole in the check valve clapper is needed to
allow for expansion of the solution during a temperature rise, thus
8.6. 1.4 Where antifreeze systems are remote from the system preventing damage to sprinklers.
riser, a placard shall be mounted on the system riser that indi FIGURE 8.6.3.1 Arrangement of Supply Piping and Valves.
cates the number and location of all remote antifreeze systems
supplied by that riser.
8.6. 1.5 A placard shall be placed on the antifreeze system Expansion
main valve that indicates the manufacture type and brand of chamber
the antifreeze solution, the minimum use temperature of the Backflow preventer
antifreeze solution used, and the volume of the antifreeze solu with control valves
l
tion used in the system.
8.6.2* Antifreeze Solutions.
8.6.2.1 * Except as permitted in 8.6.2.2, antifreeze solutions Means for conducting -
shall be listed for use in sprinkler systems. forward flow test of Only close control
8.6.2.2 Premixed antifreeze solutions of propylene glycol shall backflow preventer valve when
conducting forward Drain
be permitted to be used with ESFR sprinklers where the ESFR flow test of valve
sprinklers are listed for such use in a specific application. backflow preventer
8.6.3 Arrangement of Supply Piping and Valves. Heated area
8.6.3.1 Where the connection between the antifreeze system � FIGURE 8.6.3.3 Arrangement of Supply Piping with
and the supply piping does not incorporate a backflow preven- Backflow Device.
2022 Edition Shaded text = Revisions. Ll = Text deletions and figure/table revisions. • = Section deletions. N = New material.
