Instruction Manual

Installation
September 2013
2-19
WARNING
When using natural gas as the supply
medium, or for explosion proof
applications, the following warnings
also apply:
 Remove electrical power before
removing the housing cap. Personal
injury or property damage from fire or
explosion may result if power is not
disconnected before removing the
cap.
 Remove electrical power before
disconnecting any of the pneumatic
connections.
 When disconnecting any of the
pneumatic connections or any
pressure retaining part, natural gas
will seep from the unit and any
connected equipment into the
surrounding atmosphere. Personal
injury or property damage may result
from fire or explosion if natural gas is
used as the supply medium and
appropriate preventive measures are
not taken. Preventive measures may
include, but are not limited to, one or
more of the following: Remote
venting of the unit, re-evaluating the
hazardous area classification,
ensuring adequate ventilation, and
the removal of any ignition sources.
For information on remote venting of
this controller, refer to page 2-22.
 Ensure that all caps and covers
are correctly installed before putting
this unit back into service. Failure to
do so could result in personal injury
or property damage from fire or
explosion.
The DVC6000 SIS can be used with air or natural gas
as the supply medium. If using natural gas as the
pneumatic supply medium, natural gas will be used in
the pneumatic output connections of the DVC6000
SIS to any connected equipment. In normal operation
the unit will vent the supply medium into the
surrounding atmosphere unless it is remotely vented.
Gas Certified, Single Seal instruments can be
identified by the natural gas approval label shown in
figure 2-17. The Natural Gas Certified, Single Seal
device option simplifies conduit sealing requirements.
Read and follow all local, regional, and federal wiring
requirements for natural gas installations. Contact your
Emerson Process Management sales office for
information on obtaining a Natural Gas Certified,
Single Seal DVC6000 SIS digital valve controller.
LABEL LOCATED ON
TOP OF TERMINAL
BOX
Figure 2-17. Gas Certified Label
Supply pressure must be clean, dry air that meets the
requirements of ISA Standard 7.0.01.
Alternatively, natural gas must be clean, dry, oil-free,
and noncorrosive. H
2
S content should not exceed 20
ppm.
Filtration down to 5 micrometer particle size is
recommended. Lubricant content is not to exceed 1
ppm weight (w/w) or volume (v/v) basis. Condensation
in the air supply should be minimized.
For additional information on air quality refer to the
appropriate safety manual:
 Safety Manual for FIELDVUE DVC6000 SIS
Digital Valve Controllers for Safety Instrumented
System (SIS) Solutions 0−20 mA or 0−24 VDC
(D103035X012) or
 Safety Manual for FIELDVUE DVC6000 SIS
Digital Valve Controllers for Safety Instrumented
System (SIS) Solutions 4−20 mA (D103294X012)
A 67CFR filter regulator with standard 5 micrometer
filter, or equivalent, may be used to filter and regulate
supply air. A filter regulator can be integrally mounted
onto the side of the digital valve controller, casing
mounted separate from the digital valve controller, or
2