ASDI
Operations and Maintenance – TX Models – P/N: 54629
3-14
SAFETY RELIEF VALVE
If the vaporizer is to be installed within an enclosure or building,
vent th
e safety
relief valve outside the enclosure and re
direct the discharge
upwards
. A
pipe-away adapter must be used at the relief valve. Always install a rain-cap or
similar device to prevent water and other debris from entering the relief valve. If
water enters, it may freeze and prevent the relief valve from properly discharging,
creating a potentially hazardous situation.
ELECTRICAL SERVICE
The rating plate on the vaporizer and the data sheet provided with the manual
provides your specific vaporizer’s electrical power requirements and the drawing
numbers of the appropriate wiring diagrams and schematics. This unit is
constructed to meet ATEX/IECEx Zone I requirements (depending on model). All
wiring to the unit, including the ground connection, must meet the applicable
codes for the area in which it is being installed and with approved connectors.
Internally a ground connection is provided by the factory. Wire size and type
must comply with the applicable codes for the area in which it is being installed.
Tables
1
through
4
list the recommended wire size for the different models and
are to be used as guides only. Provide a fused disconnect or circuit breaker
outside of the classified area. If it is not within sight of the vaporizer, the fused
disconnect must have a locking device. Run wire within rigid conduit and install a
seal-off at the connection of the field conduit to the vaporizer. For Zone 1
locations, the unused entry size is 1” NPT with factory supplied M32x1.5 adapter.
Each vaporizer shall have a
separate disconnect.
If the installation is prone to surges it is recommended to protect the equipment
by installing a properly sized Semiconductor or “ultra-fast acting” fuse in each
phase upstream of the TORREXX
TM
that has a total clearing I
2
t rating of less than
18,000 A
2
sec.
GROUNDING
INTERNAL
Internal ground connection is required. Use the grounding connection in the
respective enclosure where the power is supplied. A factory provided #8 AWG
(3.26 mm diameter or 8.3 mm
2
cross sectional area) wire is permanently secured
to the enclosure. Use a dual rated (Al/Cu) and dual barrel lug connector to make
the connection between the factory and field ground wires. Reference lug
connector manufacturer’s recommendation for tightening moment. Alternatively,
crimp a dual rated (Al/Cu) ring connector to the factory provided ground wire and
make a connection at the provided junction box terminal. Reference ring
connector manufacturer’s recommendation for proper crimping tools and
technique. Reference junction box manufacturer’s recommendations for
tightening moment.
EXTERNAL
External ground connection is optional. At the back of the enclosure base an
external ground hole measuring 0.17 in (4.3 mm) in diameter is provided. Use a
5/32 in (0.156 mm) diameter blind aluminum rivet and a dual rated (Al/Cu) ring
connector to connect the external ground wire to the enclosure attachment.
Verify all
ground connections are secure.
Содержание TORREXX TX240
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