Single Zone Gas Monitor
10
P/N: 3015-4256 Rev 13
2.3.4. Connecting the Exhaust Line
The exhaust line carries the exhausted gas sample away from the monitor and is required if the monitor is
located in a confined, poorly ventilated area. If no purge line is used (ammonia monitor) you must vent the
exhausted gas sample away from the monitor to prevent erroneous readings due to improper zeroing of
the detector. Note that if the monitor is exposed to an unusually high level of gas for prolonged periods of
time, its charcoal filter (Halogen Gas Monitor Only) 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 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.
Figure 2-4. Termination Filter (P/N 3015-3420)
2.3.5. Connecting the Purge Line
The purge is an intake line that draws fresh air
into
the instrument. It should not exceed 100 feet
(30.48 m) in length. 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
gas. If this is not possible, an optional charcoal filter assembly (P/N 3015-3125) can be used with the
monitor to filter refrigerant from the purge line. It may be mounted adjacent to the monitor. (Use upgrade
kit 3015-5716 to convert an SZ with an internally mounted filter to an SZ with an externally mounted filter.)
A line-end filter (P/N 3015-3420) should be attached to the end of the purge line when the charcoal filter
is not used.
2.3.6. Installing Optional Splitter Kit
Splitter Kits are made available which allow the SZ unit to take gas sample readings from several sample
points. These kits are designed for use ONLY in confined/defined spaces with high potential for leaks,
such as food cases, cold rooms, refrigeration rack rooms, etc. Bacharach’s SZ 2-way (P/N 3015-5404)
and 3-way (P/N 3015-5405) splitter kits are available as an optional accessory. Refer to instruction 3015-
5415 (supplied with kit) for detailed installation instruction.
2.3.7. Connecting the Water Trap
The water trap (P/N 0007-1655) is an optional accessory for applications that result in water or
condensation frequently entering the intake lines. Install the trap close to the unit for the most effective
results. The intake line may be cut where the user finds appropriate (preferably close to monitor). Each
side of the intake line should be inserted into the receivers on either side of the water trap. Secure tightly.
A replacement filter (P/N 0007-1656) for the water trap is available and is replaced by unscrewing the
clear plastic cup of the water trap, pulling the filter directly out (do not unscrew), and inserting the new
filter into place. Replace the cup of the water trap. If desired, an optional mounting bracket (0007-1657)
may be used to secure the water trap in place.
NOTE:
The termination filter (P/N 3015-3420) or end-of-line water stop filter (P/N 3015-
5512) should be used, regardless of the presence of a water trap.
WARNING:
Extreme temperatures and/or humid conditions may cause water to condense
in the tubes. A water trap is highly recommended for use in these scenarios.
