Piping Design Guidelines - Honeywell Xtralis FAAST FLEX FLX-010 Product Manual

FAAST FLEX
9

Piping Design Guidelines

Proper operation of the FAAST FLEX is highly dependent on proper design and installation of the inlet piping.
For the detector to perform at maximum efficiency the inlet piping must collect ambient air from the protected
space and deliver it to the detector with unobstructed airflow. The factors that impact this process include the
following:
Length and diameter of inlet piping
l
Angle and location of bends in inlet piping
l
Length of exhaust piping
l
Location, diameter and spacing of air collection holes
l
Aspirator speed
l
Alarm Levels
l
Presence/absence of filter
l
The tables in this section are created to give installers an idea on the maximum level of flexibility for a generic
application, thus balance and sensitivity can be affected by the type of installation and the quality of the drilled
holes. The end hole has a greater diameter than all other holes to accelerate the flow and meet the transport
time requirements needed to generate the tables.
The following figures illustrate the various parameters used in the calculations provided in the Piping Tables in
the following pages, taking into consideration the transport time for classes A, B and C is as below:
Note: For installations not covered in the pre-engineered tables use ASPIRE software to achieve an
optimum design of pipe networks.
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Classes Transport Time
Class A 50 seconds
Class B 70 seconds
Class C 90 seconds
FAAST FLEX Product Guide
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