Maintenance - Emerson Fisher VS100 Series Instruction Manual

VS100 Series

Maintenance

!
Only a qualified person shall perform
maintenance procedures. if necessary,
contact your local Sales Office.
Failure to test the slam-shut device for
proper shutoff can result in a hazardous
condition. Test the slam-shut device for
operation per applicable federal, state and
local codes, rules and regulations and
emerson instructions.
Due to normal wear or damage that
may occur from external sources,
the slam-shut device should be
inspected and maintained periodically.
The frequency of inspection and
replacement depends on the severity
of service conditions, test results
found during the annual test and on
applicable codes and regulations. In
accordance with applicable national
or industry codes, standards and
regulations/ recommendations, all
hazards covered by specific tests after
final assembling before applying the
CE marking, shall also be covered
after every subsequent reassembly at
installation site, in order to ensure that
the equipment will be safe throughout
its intended life.
Periodic inspection must be performed
on the VS100 Series. The slam-shut
device should be tested for both under
and overpressure shutoff activation
and pressure tight shutoff annually with
test intervals not to exceed 15 months
but at least once each calendar year.
if the slam-shut device does not close
at the desired pressures or leaks gas
after closure, repair and/or replace the
slam- shut device.
Servicing Check
• Recommended frequency:
- Annually but not to exceed 15 months
• Verification:
- Tripping and tripping value
- Slam-shut device valve plug tightness
12
Warning
• Beginning valve positions refer to Figure 7:
- Inlet valve (V1)
g Open
- Outlet valve (V2)
g Open
- Slam-shut device valve plug
g Open
- Regulator
g In operation
Inlet and outlet sides of the regulator under pressure.
• Tripping verification:
- Inlet valve (V1)
g Closed
- Outlet valve (V2)
g Closed
- Regulator
g Increase setpoint to reach tripping without
exceeding outlet limits
Disassembly
!
Only parts manufactured by emerson
should be used for repairing the
VS100 Series Slam-shut Device.
• Recommended frequency:
- Every 3 years minimum
• Verification:
- Condition of O-rings, diaphragm, disk, orifice
and lubrication
• Replace parts
- Refer to Figure 15 in the VSX4 and VSX8 Series
Instruction Manual. O-rings (keys 33 and 46),
diaphragm (key 6) and safety valve plug
(key 47). Refer to disassembly section of the
VSX4 and VSX8 Series Instruction Manual
- Refer to Figure 9 in VS100 Series Instruction
Manual. Orifices (keys 60 and 63) and O-rings
(keys 61 and 73). Refer to disassembly section of
the VS100 Series Instruction Manual
- Or replace the VSX4 and VSX8 Series controller
Disassembly of the VSX4 and
VSX8 Series Controller
Refer to VSX4 and VSX8 Series Instruction Manual.
Warning