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Idiomas disponibles
Idiomas disponibles
C1N 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 • 215-1820 Rev. D
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