Possible Faults; Maintenance; Disposal; Warning - Grundfos Vaccuperm VGA-146 Instrucciones De Instalación Y Funcionamiento

6.4 Possible faults

Fault To be recognized by
Gas odour
Formation of mist at the connections
when checking the tightness
Gas escapes at the overpressure
Gas leakage
line while the plant is not running
Loss of pressure at the manometer
while the plant is not running and
the gas supply is closed
Vacuum present in the overpressure
Overpressure valve not
line while the plant is running (to be
tight
felt by putting on a finger)
Vibrations and booming of the
Disturbed regulation
device
Vacuum present in the overpressure
line while the plant is running (to be
felt by putting on a finger)
Desired dosing flow is
not
reached
Pressure gauge of the vacuum
regulator
Formation of ice on filter or pressure
line connection during start-up,
Re-liquefaction of the
damages of PVC enclosure parts
gas
(only visible when the device is
open)
External evaluation
Formation of ice on filter or pressure
device shows
line connection during start-up,
mistakenly too low
damages of PVC enclosure parts
admission pressure
(only visible when the device is
(only for the optional
open)
contact manometer

7. Maintenance

Rates for cleaning and maintenance
– at least every 12 months
– in case of malfunction

Warning

Do not open the device!
Cleaning, maintenance and repair only by authorized
personnel!
Warning
Switch off the whole plant before doing cleaning and
maintenance work!
Danger of gas break-out!
Warning
Check the tightness before restarting!
Danger of gas break-out!
18
Cause Correction
Connections not tight Check connections and retighten them
Inlet valve not tight Call the service
Inlet valve or connections
Call the service
not tight
Spring corroded or soiled Call the service
O-ring (19) defective Replace o-ring (19)
Diaphragm defective Call the service
Diaphragm distored or
Call the service
mounted incorrectly
Diaphragm damaged Call the service
Admission pressure too low
Call the service
(< 2 bar)
Gas container empty Replace gas containers by full ones
Shut-off valves in the
pressure lines closed or not Open the shut-off valves
perfectly open
Wrap a heater band around the filter and/
Temperature at the pressure
or the pressure line connection and warm
line connection lower than
them up. Close gas supply before the
the temperature of the other
filter, adjust the gas dosing system to
pressure gas lines
minimal dosing flow and start the plant
Heating of the liquid trap not
Call the service
connected or defective
Vacuum regulator without
liquid trap used with gas Use a vacuum regulator with a liquid trap
drum
Line between contact
manometer and evaluation Check line and repair it
device interrupted

8. Disposal

This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest Grundfos company
or service workshop.