IM_1GSW-02
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Excela™ Electronic Pressure and
Temperature Switches
Discrete Input Powered
U N I T E D E L E C T R I C
C O N T R O L S
Installation and Maintenance
Instructions
IM_1GSW-02
Please read all instructional literature carefully and thoroughly before starting. Refer to the final page for the listing of
Recommended Practices, Liabilities and Warranties.
GENERAL (MOUNTING and WIRING)
MISUSE OF THIS PRODUCT MAY CAUSE PERSONAL INJURY. THESE INSTRUCTIONS MUST BE THOROUGHLY
READ AND UNDERSTOOD BEFORE UNIT IS INSTALLED. SEE PRODUCT NAMEPLATE INFORMATION FOR SPE-
CIFIC AGENCY CERTIFICATIONS APPLICABLE TO YOUR PRODUCT.
CONTINUOUS OPERATION SHOULD NOT EXCEED THE DESIGNATED OVER RANGE PRESSURE OR WORKING
PRESSURE RANGE STATED WITHIN THE LITERATURE AND ON DEVICE NAMEPLATE.
INSTALLATION
Tools Required
1-1/16” wrench for sensor hex fitting
screwdriver for mounting bolts
2 mounting bolts (1/4” Max.)
MOUNTING
FOR PRESSURE AND LOCAL TEMPERATURE MODELS, ALWAYS HOLD A WRENCH ON THE SENSOR HEX WHEN
MOUNTING UNIT. DO NOT TIGHTEN BY TURNING ENCLOSURE. THIS WILL DAMAGE THE CONNECTION BETWEEN
THE SENSOR AND HOUSING.
INSTALL UNITS WHERE SHOCK, VIBRATION AND TEMPERATURE FLUCTUATIONS ARE MINIMAL. ORIENT UNIT
MAKING SURE THAT THE ELECTRICAL CONDUIT CONNECTION IS NOT FACING UP, TO PREVENT MOISTURE FROM
ENTERING ENCLOSURE. DO NOT MOUNT UNIT IN AMBIENT TEMPERATURES EXCEEDING PUBLISHED LIMITS.
FOR DIFFERENTIAL PRESSURE MODELS (ESPECIALLY LOW RANGE UNITS), MOUNT THE SENSOR LEVEL TO MINI-
MIZE ANY PRESSURE READING OFFSETS. THE OFFSET COMMAND MAY BE USED TO ZERO THE DISPLAY (SEE
PAGE 5 FOR ADDITIONAL INFORMATION).
Excela is rated for both indoor and outdoor operation, IP66 and Nema 4X, with a temperature rating of -40°C to 71°C
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Surface mount the unit using the two (2) 1/4” clearance holes in the mounting ears
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Pressure and Differential Pressure units can be mounted directly to process connections if they are able to sup-
port the product.
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To pipe mount: Thread the pressure connection onto the pressure port. Use a wrench on the hex pressure con-
nection to tighten. Test for leaks. On Differential Pressure models, the Low (L) side pressure must NOT exceed the
high (H) side pressure.
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Allow space in front of the unit to access the programming function of the product.
Over Range Pressure:
The maximum pressure to which a pressure sensor may be continuously subjected to without causing damage and maintaining setpoint repeatability.
Max Working Pressure:
The maximum that can be applied to both process ports simultaneously without affecting sensor performance. The low (L) side pressure must NOT
exceed the high (H) side pressure. Damage to the sensor may result.
WARNING: NEVER INSERT ANY OBJECT INTO THE PRESSURE SENSOR OPENING. DAMAGE TO THE SENSOR WILL
RESULT, AFFECTING ACCURACY.
