Specifications

Instruction 3015-4256 5
2 Installation
Installation Considerations
Warnings & Cautions
WARNING: Explosion hazard! Do not mount the HGM-SZ in an area that may contain
flammable liquids, vapors or aerosols. Operation of any electrical equipment in such an
environment constitutes a safety hazard.
WARNING: Shock hazard! Always disconnect AC power before working inside
the monitor.
CAUTION: Drilling holes in the HGM-SZ enclosure may damage the unit and will void the
warranty. Please use knockouts provided for electrical connections.
CAUTION: The HGM-SZ contains sensitive electronic components that can be easily
damaged. Be careful not to touch or disturb any of these components.
Inspection
The HGM-SZ has been thoroughly inspected and tested prior to shipment from the factory. Nevertheless, it is
recommended that the monitor be re-checked prior to installation. Inspect the outside of the enclosure to make
sure there are no obvious signs of shipping damage. Open the enclosure and inspect the interior of the monitor
for loose components that may have become dislodged during shipment. If damage is discovered, please
contact the nearest Bacharach Service Center for assistance.
Location of the Monitor
Place the monitor in a location that will require no more than 500 ft (152.4 m) of tubing (total of sample line +
exhaust) to reach the sampling area. Since the monitor uses ambient air to zero its gas sensor, the monitor
should be located in an area that normally does not contain refrigerant gas. If an exhaust line is not used, then
locate the monitor in a well ventilated area so that the exhaust gas does not accumulate around the monitor’s
ventilation holes.
The HGM-SZ should be operated in an environment that is between 32 and 122°F (0 and 50°C); has a relative
humidity that is from 5 to 90% non-condensing; and is at an altitude of no more than 6,562 ft (2,000 m). The
area should also be relatively free of dirt, grease, and oils that could adversely affect the operation of the
monitor.
The location should allow the monitor to be easily accessible for visual monitoring and servicing.