Bacharach HGM-SZ Installation & Operation Manual

Also see for AGM-SZ: Product catalog Installation & operating instructions

Bacharach HGM-SZ Installation & Operation Manual Manual pdf 14 page image

Single Zone Gas Monitor10 P/N: 3015-4256 Rev 132.3.4. Connecting the Exhaust LineThe exhaust line carries the exhausted gas sample away from the monitor and is required if the monitor islocated in a confined, poorly ventilated area. If no purge line is used (ammonia monitor) you must vent theexhausted gas sample away from the monitor to prevent erroneous readings due to improper zeroing ofthe detector. Note that if the monitor is exposed to an unusually high level of gas for prolonged periods oftime, its charcoal filter (Halogen Gas Monitor Only) will quickly become saturated and no longer able toclean the purge-air of refrigerant gas.The exhaust line can be up to 100 ft (30.52 m) inlength. Ideally, this line should terminate outdoorsin a location that is not exposed to the elements.Connect the exhaust line to the monitor by firmlypushing the tubing onto the barbed fitting. If theexhaust line terminates outside the building,position the tubing so that no water or moisturecan enter the line. Note that this line does notrequire a termination filter. Figure 2-4. Termination Filter (P/N 3015-3420)2.3.5. Connecting the Purge LineThe 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 exposedto 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 ambientgas. If this is not possible, an optional charcoal filter assembly (P/N 3015-3125) can be used with themonitor to filter refrigerant from the purge line. It may be mounted adjacent to the monitor. (Use upgradekit 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 filteris not used.2.3.6. Installing Optional Splitter KitSplitter Kits are made available which allow the SZ unit to take gas sample readings from several samplepoints. 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 TrapThe water trap (P/N 0007-1655) is an optional accessory for applications that result in water orcondensation frequently entering the intake lines. Install the trap close to the unit for the most effectiveresults. The intake line may be cut where the user finds appropriate (preferably close to monitor). Eachside 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 theclear plastic cup of the water trap, pulling the filter directly out (do not unscrew), and inserting the newfilter 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 condensein the tubes. A water trap is highly recommended for use in these scenarios.