System Sensor Pipe Installation - Manual (Page 4)

User Guide: Aspirating Smoke Detector Pipe Installation
4
Pipe Overview
Pipe Network Components
The FAAST detector uses standard aspiration fire detection pipe
network components, such as pipes, elbows and couplings.
The components listed in this section are not an all inclusive list,
however they represent the most commonly used items.
Pipes
The pipes used in the pipe network can be made of various
materials including copper, PVC, ABS, UPVC and CPVC. The
internal pipe diameter used with the FAAST system can range
from 0.591" to 0.827" (15 to 21 mm). Ideal dimensions vary
depending on system design requirements as well as local
codes and regulations. The FAAST detector has a built in tiered
insertion point for the pipes which allows for an outside tube
diameter of either 1.050" or 25 mm to accommodate U.S.
Customary System and Metric System Sized Pipes.
Frequently Asked Question – Can we use metal pipe instead
of plastic with FAAST?
Yes. It is acceptable to use either steel or copper pipe under the
following conditions:
• The pipe size used must be capable of fitting to a plastic
pipe upon interfacing with the FAAST device. The inner
diameter must be within the approved range of
.591" - .827" ( 15.00 - 21.00 mm ).
• The material must be approved by the local authority
having jurisdiction and must also be approved by the
insurance underwriter
Pipe Temperature
Pipe selection may be contingent on the temperature of the
room in which the pipe will be mounted. Table 1 shows
temperature ranges for various types of pipe.
Pipe Material Service Temperature
ABS -40 – 80°C (-40 to 176°F)
PE-80 -50 to 60°C (-58 to 140°F)
PE-100 -50 to 60°C (-58 to 140°F)
CPVC -26 to 93°C (-15 to 200°F )
PVC -26 to 49°C (-15 to 120°F)
Copper -150 to 110°C (-238 to 230°F)
Table 1: Temperature ranges for various types of pipe.
* For specific design considerations in cold temperature
applications, download the Cold Storage White Paper from
systemsensor.com/faast
Fittings
Fittings are used to connect sections of pipe together on longer
network runs and are made from the same material as the pipe.
There are several types of fittings to allow for various bends,
straight runs, branches and connections. Common fittings are
described in the following sections.
Couplings and Unions
Couplings and unions are used to connect two sections of pipe
in a straight line. A coupling is used when the section is not
intended to be taken apart.
A union offers the ability to screw the two pipe sections together
for future access, such as areas of the pipe network that have
to be periodically disassembled for maintenance and cleaning.
Unions can also be used to orient sample ports correctly in
a specific section of the pipe network, such as over return
air grilles (for more information on high air flow and duct
applications, see the white paper at systemsensor.com/faast).
Figure 1 shows a typical union and coupling.
ASP-76
ASP-75
Figure 1: Couplings and unions.
Elbows
Elbows are used to change the direction of the pipe network.
Both 45 degree and 90 degree elbows may be used. Both
elbow fittings are shown in figure 2.
45°
ASP-77 ASP-78
90°
Figure 2: Elbows.
Tees
Tees are also used for branching into multiple pipes from a
single pipe network. A specialized tee can be used to attach a
capillary tube and a sampling port. A tee is shown in figure 3.
ASP-80
Figure 3: Tees