CHANGEOVER SYSTEMS
PCSA, CRSA, HPCA, LCSA, LPRA Series
Automatic Changeover Alarm Systems
 Advanced Changeover
Systems are available pre-wired with pressure switch gauges and quick-connect automatic alarms for convenient wall-mount installation. Visual and audible
alarms alert the user of cylinder changeover and the need to replenish gas supply. The stand-alone annunciator can be located next to the changeover or
mounted remotely.
Electrical connection between the changeover and annunciator is made with quick contact, miniature connectors. When purchased for local annunciator
installation, a 3' interconnecting cable with mating connectors is supplied with each system. Optional cable lengths are available. If remote connection
is required, two (3') interconnecting cables with mating connector and flying leads ends are provided, making it convenient to install electrical wiring.
Mechanical specifications for each changeover series can be found by the specific changeover . The changeover
alarm systems are assembled using Reed Switch Pressure Gauges, Models SG6520 or SG6521 and Annunciator Alarms, Models
SG6551A or SG6552. Additional product information can found in the referenced section. The following part number keys are to be used for ordering changeover
alarm systems pre-wired with pressure switch gauges and quick-connect automatic alarms.
Warning: Do not use these systems for flammable gases. We strongly recommend the use of our Explosion-Proof Type Pressure Switch Model
SG6541 for all flammable applications.
Note: When ordering, specify local or remote annunciator installation.
PCSA Series – Part Number Key for Primary Changeover Alarm Systems
Primary Changeover Alarm System assembled with Model PCS.
CRSA Series – Part Number Key for Automatic Changeover Alarm Systems
Automatic Changeover Alarm System assembled with Model CRS.
HPCA Series – Part Number Key for High Flow Primary Changeover Alarm Systems
High Flow Primary Changeover Alarm System assembled with Model HPC.
LCSA Series – Part Number Key for Cryogenic Liquid Container Changeover Alarm Systems
Cryogenic Liquid Container Changeover Alarm System assembled with Model LCS.
LPRA Series – Part Number Key for Laser Gas Process Rack Changeover Alarm Systems
Laser Gas Process Rack Changeover Alarm System assembled with Models PCS or CRS.
Note: Annunciator Alarm Model SG6554 is used with this system assembly.
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