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3.4
PROTECTION AGAINST MOISTURE DAMAGE
It is important to take proper precautions during
installation to ensure that moisture will not come
in contact with the electrical connections of the
system. The integrity of the system regarding
moisture protection must be maintained for
proper operation and is the responsibility of the
installer.
If conduit is used, the use of proper conduit
installation techniques, breathers, glands, and
seals is required to prevent water ingress and/or
maintain the explosion-proof rating.
Conduit drains must be installed at water
collection points to automatically drain
accumulated moisture. Conduit breathers
should be installed at upper locations to
provide ventilation and allow water vapor to
escape. At least one breather should be used
with each drain.
Conduit raceways should be inclined so that
water will flow to low points for drainage and
will not collect inside enclosures or on conduit
seals. If this is not possible, install conduit drains
above the seals to prevent the collection of water
or install a drain loop below the detector with a
conduit drain at the lowest point of the loop.
POWER SUPPLY REQUIREMENTS
Calculate the total detection system power
consumption rate in watts from cold start-up.
Select a power supply with adequate capability
for the calculated load. Ensure that the selected
power supply provides sufficient regulated and
filtered output power for the entire system. If a
back-up power system is required, a float-type
battery charging system is recommended. If an
existing source of power is being used, verify
that system requirements are met.
TRANSPORT COVER
The Transport Cover (see Figure 4) keeps dust
and particles out of the smoke chamber that may
enter during transport, handling, or installation. It
should remain fastened on the detector through
the installation process.
IMPORTANT
Remove the cover
only
after installation
is complete and prior to powering the
detector for the first time.
MOUNTING LOCATION OPTIONS
Ceiling Mount
The U5015 is intended for surface mounting. It is
normally mounted on the ceiling no less than six
inches from a side wall (See Figure 5). The exact
location of the detector must be determined by an
evaluation based on engineering judgement, or if
possible, by field tests.
Wall Mount
The U5015 can also be mounted on a side wall
(See Figure 6). The exact location of the detector
must be determined by an evaluation based
on supplemented engineering judgement, or if
possible, by field tests.
IMPORTANT
Whenever possible, select a mounting
orientation where the LED is visible to
personnel within the area.
Figure 4—U5015 Transport Cover
TRANSPORT
COVER
Figure 5—U5015 Ceiling Mount
6” Minimum
CEILING
LED
NOTE: MAKE CERTAIN THAT THE LED
IS POSITIONED WHERE VISIBLE.
SIDE
WALL
A2681
