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Idiomas disponibles
Idiomas disponibles
CLE Series Tankless Heater
Purge Gas Supply Notes
An alarm shall be provided to indicate failure of the protective gas supply to maintain the required pressure .
Piping for the protective gas shall be protected against mechanical damage .
Where the compressor intake line passes through a classified location, it shall be constructed of
noncombustible material, designed to prevent leakage of flammable gases, vapors, or dusts into the protective
gas, and protected against mechanical damage and corrosion .
The electrical power for the protective gas supply (blower, compressor, etc .) shall be supplied either from a
separate power source or from the protected enclosure power supply prior to any service disconnects of the
protected enclosure . Any protected enclosure that can be isolated from the protective gas supply shall be
equipped with an alarm . Where an alarm is used to indicate the loss of pressure in the cabinet:
• The alarm shall be located at a constantly attended location .
• The alarm actuator shall take its signal from the protected enclosure and shall not be installed between the
enclosure and the protective gas supply .
• The alarm actuator shall be mechanical, pneumatic, or electrical .
• Electrical alarms and electrical alarm actuators shall be approved for the location in which they are
installed .
• No valves shall be permitted between the alarm actuator and the enclosure .
Intrinsically Safe (IS) Installation
Hazardous Location
Class I , Division 2
Groups A, B, C, D
T5 Hazardous (classified) Areas
Simple apparatus
device
MiniPurge: Option Code/IS
Vmax = 30v
Imax = 350 mA
Ci = 0 Li = 0
1 . Electrical equipment connected to associated apparatus should not use or generate more than 250 volts .
2 . Installation shall be in accordance with the manufacturer's instructions and the National Electrical Code (NFPA
70) .
3 . For guidance on Installation see ANSI/ISA RP12 .6 (Installation of IS Instrument System in Class I
Hazardous Locations) .
4 . Voc or Vt of associated apparatus is less than Vmax
Isc or IT of associated apparatus is less than Imax
Ci plus capacitance of interconnecting cabling is less than Ca of the associated apparatus
Li plus inductance of interconnecting cabling is less than La fo the associated apparatus
5 . "Simple Apparatus" is a device that will not generate or store more than 1 .2V, 0,1A, 25 mW or 20 uJ
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1/10/2022
Non- Hazardous Location
(or suitably protected enclosure)
Intrinsically Safe
Interface Unit
Installation
Power Supply
Outputs to relays or
power contactors
Bradley • 215-1822 Rev. D
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