Types 749B and R130
7
counterclockwise to decrease the pressure. The
indicator should show red at about 3 psi / 0.21 bar
above the new reserve setting. The indicator should
show silver at about 6.5 psi / 0.45 bar above the new
reserve setting.
CAUTION
Set both manifold regulators to the
same reserve pressure setting. The
supply handwheel when installed, will
automatically provide the additional
adjustment to set the supply pressure.
Maintenance
!
WARNING
To avoid personal injury or equipment
damage, do not attempt any maintenance
or disassembly without first isolating
the regulator from system pressure and
relieving all internal pressure.
Regulators that have been disassembled
for repair must be tested for proper
operation before being returned to
service. Only parts manufactured by
Fisher
®
should be used for repairing
Fisher regulators. Relight pilot lights
according to normal startup procedures.
Due to normal wear or damage that
may occur from external sources,
these regulators must be inspected and
maintained periodically. The frequency
of inspection and replacement of the
regulators depends upon the severity of
service conditions or the requirements
of local, state, and federal regulations.
Even under ideal conditions, these
regulators should be replaced after
15 years from the date of manufacture or
sooner should inspection reveal the need.
Visually inspect the regulator each time a gas delivery is
made for:
1. Improper installation.
2. Plugged or frozen vent.
3. Wrong regulator or no regulator in the system.
4. Internal or external corrosion.
5. Age of the regulator.
6. Any other condition that could cause the
uncontrolled escape of gas.
Failure to do the above could result in personal injury or
property damage.
Make sure the regulator vent, vent assembly, or vent
tube does not become plugged by mud, insects, ice,
snow, paint, etc. The vent screen aids in keeping the
vent from becoming plugged, and the screen should be
clean and properly installed.
Replace any regulators that have had water in their
spring case or show evidence of external or internal
corrosion. Checking for internal corrosion may require
complete removal of the adjusting screw and shut down
of the gas system. Closely examine regulators directly
connected to the container valve by means of a solid
POL adaptor (horizontal mounting) for signs of corrosion.
Correct any improper installations.
Older regulators are more likely to catastrophically fail
because of worn or corroded parts. Replace regulators
over 15 years of age; other service or environmental
conditions may dictate replacement of the regulator
before it becomes 15 years old, refer to Fisher
Bulletin LP-32.
Regulator Repair
Regulators that have been disassembled for repair
must be tested for proper operation before being
returned to service. Only parts manufactured by Fisher
should be used to repair Fisher regulators. Be sure to
give the complete type number of the regulator when
corresponding with the factory.