8 • RLDS I&O Manual
026-1309 Rev 8
provided to ensure clean air is being drawn in through
the purge line. This filter should be mounted close to
the RLDS.
It is advisable to terminate the purge line outdoors,
provided the input is not exposed to rain, snow, ice,
exhaust fumes, or other airborne contaminates. If an
outdoor installation is impractical, the line should be
run to an area inside the facility that you are certain is
not contaminated with ambient refrigerant gas.
A line-end filter should be attached to the end of the
purge line. If this is not possible, an optional
charcoal filter assembly (
P/N 275-0275
) can be used
to filter refrigerant from the purge line, and may be
mounted adjacent to the monitor. A line-end filter
assembly (
P/N 275-0300
) should be attached to the
end of the purge line when the charcoal filter is not
used.
3.3.4. Connecting Exhaust Line
An exhaust line (¼” OD tubing) (6.35 mm) can be
used when it is required to vent gas samples away
from the instrument and should not exceed 300 feet
(91 meters). The exhaust line should terminate in
a location that is completely isolated from the purge
line termination point and other areas of the facility
that will be monitored. Ideally this line should
terminate outdoors in a location that is not exposed to
the elements. This line does not require a line-end
filter. If the exhaust line terminates outside the
building, position the tubing so that no water or
moisture can enter it.
3.3.5. Connecting Sample Intake
Lines
The RLDS is designed to accommodate up to 16
separate sample intake lines. The standard
configuration of the unit includes one manifold of
four intake connectors and one purge connector.
Additional manifolds can be easily installed to
increase monitoring capacity. Please contact
Technical Assistance (
770-425-2724
) for more
information.
Sample intake lines can be up to 1200 feet (365
meters) when no exhaust tubing is used. Otherwise,
the combined length of the sample line and the
exhaust line cannot exceed 1200 feet (365 meters).
All line terminations should be positioned to reduce
the possibility of mists, aerosols, oil, water, dust, or
other contaminates being drawn into the instrument.
A line-end filter (included) should be attached to the
end of each sample intake line. Line-end filters should
be placed 12” to 18” (30 to 45 cm) above the floor.
IMPORTANT:
DO NOT
block any of the zones.
Unused zones may be disabled by setting their length
parameter to zero feet in the
Zone Setup screen
).
Please refer to the earlier section
Section 2.5., Suggested Location of Sampling
) to learn more about where to locate the
monitoring points.
3.3.6. Considerations
For maximum protection, the RLDS may be shut
down when a System Fault occurs. This might be
desired, for example, when the RLDS is used in wet
locations such as meat preparation rooms. When
water is pulled into the system, a System Fault will
occur, closing the fault relay located at the bottom of
the main control board. To turn power off to the
RLDS when this occurs, wire the fault relay into a
spare 16AI input. Route the power supply to the
RLDS through an 8RO output using the normally
closed contacts. Program the E2/Einstein to alarm the
fault input on a contact closure and turn on the 8RO
output when this occurs. This can be done using a
Digital Sensor Control application in the E2/Einstein.
Refer to the E2 Installation and Operation manual
(
P/N 026-1614
) for details on setting up a Digital
Sensor Control application.
CAUTION: (CO
2
Only): Because CO
2
is
present in ambient air, the purge line MUST
BE run outside, away from any known sources
of CO
2
gas. An atmospheric CO
2
concentration value can be manually entered by the
user in the CAL screen. CO
2
is supported by RLDS-CO
2
units. See Section 8.9.4. CO2 Atmospheric Concentra-
CAUTION: The introduction of contaminants
through the air intake lines can result in
serious and permanent damage to the monitor.
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