ONICON System-10 BTU - Manual (Page 15)

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System-10 BTU Meter Manual 03/15 - 0651-16 / 18323 Page 15
3.3 ELECTRICAL INSTALLATION
3.3.1 Input Power
All user supplied conduit fittings, junction boxes, etc. are to be installed at this time as
required by legal codes. Note that input power can be 24 VAC, 120 VAC or 240 VAC.
(Not user selectable)
OPERATING FROM 120 or 240 VAC MAINS POWER
Utilize an electrically clean power line, free of electrical noise and protected from high
voltage spikes, power surges, and brownouts. The power source should be a separate line
with its own circuit breaker or circuit protection device. Refer to Section 1.3 of this
manual for the appropriate over current device ratings. Use a three-wire service in which
one wire is a protective earth ground.
!
WARNING
Conduit openings in the System-10 enclosure must be closed with UL listed fittings applicable to
NEMA 13 enclosures.
!
!
!
WARNING
The protective earth connection must be made as shown. Failure to do so will result in an
increased risk of injury.
WARNING
All mains voltage connections must be made through pre-drilled conduit/strain relief opening
located at the bottom of the enclosure. Failure to do so will result in an increased risk of injury.
CAUTION
This product must be connected to earth ground for proper operation. Failure to do so may result
in erratic operation.
i
IMPORTANT NOTE
This option is not field selectable. Contact ONICON if you need to change the input voltage rating.