Fireye 45UV5 - Page 5

5
®
Under normal temperature conditions, with clean burning fuels and moderate ambient temperature
conditions, purge air flow of approximately 4 SCFM (113 L/min) is generally adequate. A 0.1 psig
positive pressure difference between the atmosphere and boiler pressure measured at right angle to the
purge air flow, should result in a purge air flow of 4 SCFM. Up to 15 SCFM (425 L/min) may be
required for fuels that may produce high levels of smoke of soot or for hot environments to maintain
scanner internal temperature within specifications.
NOTE: The maximum v iewing field of the lens is one inch per foot. Do not use more than one foot of
one inch s ight pipe. Increase sight pipe diameter one inch for every additional foot
of sight pipe
length used, to avoid restricting the scanner’s field of view. Temperature in the scanner housing
should not exceed those temperature limits listed in the specifications. Excessive temperatures will
shorten scanner life.
FIGURE 5.
7'%22)6;-6-2+
All FIREYE controls are protected against short-circuited scanner input terminals. Following recom-
mendations apply for scanner-control wiring: The following recommendations apply for scanner con-
trol wiring:
d Keep scanner wiring as short as possible.
d Use wires rated for scanner voltage and its ambient conditions (temperature, humidity, oil resis-
tant, flame retardant, etc.)
d Do not run scanner wires in the same conduit as other electrical wires.
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Distributed By: M&M Control Service, INC. 800-876-0036 Sales@mmcontrol.com