Vent; 3582 Positioner - Emerson Fisher 3582 Instruction Manual

Instruction Manual
June 2010
12B8045-A
3582 VALVE POSITIONERS
A6077−1/IL

Vent

WARNING
Personal injury or property damage
could result from fire or explosion of
accumulated gas if a flammable gas is
used as the supply pressure medium
and the positioner/actuator is in an
enclosed area. The positioner/actuator
assembly does not form a gas-tight
seal, and when the assembly is
enclosed, a remote vent line, adequate
ventilation, and necessary safety
measures should be used. For leakage
rates, see the Maximum Steady-State
Air Consumption specification. A
remote vent pipe alone cannot be
relied upon to remove all hazardous
gas. Vent line piping should comply
with local and regional codes and
should be as short as possible with
adequate inside diameter and few
bends to reduce case pressure
buildup.
WARNING
3582i does not meet third party
approvals for use with natural gas as
3582 POSITIONERS
BODY
PROTECTOR
BODY
Figure 8. Diagnostic Connections
3582, 582i, and 3583
GAUGE
STEM PROVIDED
WHEN GAUGE IS
SPECIFIED
12B8046-C
A6078−2/IL
the supply medium. Use of natural gas
as the supply medium can result in
personal injury or property damage
from fire or explosion.
When installing a remote vent pipe,
take care not to overtighten the pipe in
the vent connection. Excessive torque
will damage the threads in the
connection.
The vent opening at the back of the case marked
VENT should be left open to prevent pressure
buildup inside the case and to provide a drain hole
for any moisture that might collect inside the case.
The perforated section of the nameplate normally
covers this opening to prevent blockage from debris
or insects. Also, ensure the exhaust holes in the
relay (key 32 in figure 20) are kept open.
If a remote vent is required, the vent line must be as
short as possible with a minimum number of bends
and elbows. The vent connection is 3/8 NPT internal.
Use 3/8-inch or larger tubing to provide a remote
vent. The 582i has a 1/4 NPT internal vent
connection. Use optional remote vent 83L relay for
remote vent applications.
3582i
BODY
PROTECTOR
BODY
3582i VALVE POSITIONER
CAUTION
17