Specifications

Instruction 3015-4256 7
Tubing Considerations
Use ¼ in. outside diameter (0.040 in. wall) flex tubing for all air lines (P/N 304-2742 or equivalent). The tubing
should be clean and free of moisture or other contaminants. The tubing should be cut cleanly with a sharp knife
and care should be taken not to distort the tubing end.
IMPORTANT! Due to the reactive nature of refrigerant gas, it is important to use materials that will not absorb
the gas as it passes through the sampling system. The use of unauthorized tubing or any other materials in the
gas-sampling stream may lead to erroneously low readings.
All tubing bends should have a radius of no less than 5" to insure proper airflow. If kinks or obstructions occur in
the line the monitor may not function properly.
Connecting the Gas-Sample Line
Please refer to Section Suggested Location of Sampling Point (Page 4) to learn more about where to take a gas
sample.
The gas-sample line can be up to 500 ft (152.4 m) in length. The combined length of the sample line and
exhaust line (if one is used) should not exceed 500ft.. The end of this line should be placed near the potential
leak source and positioned to reduce the possibility of mists, aerosols, oil, water, dust, or other contaminates from
being drawn into the monitor. For added protection, a termination filter (P/N 3015-3420) supplied with the monitor
must be attached to the end of this line.
CAUTION: The introduction of contaminants through the gas-sample line can
result in serious and permanent damage to the monitor.
Connecting the Exhaust Line
The exhaust line functions to carry the exhausted gas sample away from the monitor and is required if the
monitor is located in a confined, poorly ventilated area. Note that if the monitor is exposed to an unusually high
level of refrigerant gas for prolonged periods of time, its charcoal filter will quickly become saturated and no
longer able to clean the purge-air of refrigerant gas.
The exhaust line can be up to 100 ft (30.52 m) in length. Ideally, this line should terminate outdoors in a location
that is not exposed to the elements. Connect the exhaust line to the monitor by firmly pushing the tubing onto
the Exhaust Port’s barbed fitting. If the exhaust line terminates outside the building, position the tubing so that
no water or moisture can enter the line. Note that this line does not require a termination filter.
Termination Filter (P/N 3015-3420)