Gast ROA Series Laboratory - Manual (Page 3)

ƽ
WARNING The head surface(s) can be very hot
depending on pump duty and speed.
Do not touch these parts during
operation.
ƽ
CAUTION Do not operate these units above
25 in. Hg vacuum or 100 PSIG
pressure (45 PSIG intermittent). To
do so will damage the unit.
ƽ
WARNING Do not operate without the grille(s), if
provided, in place. Failure to do so
could result in severe personal injury.
Starting
ƽ CAUTION
Do not start against a vacuum or
pressure load.
If the pump is extremely cold, let it warm up to room
temperature before starting. If the pump does not operate
properly, see the troubleshooting guide.
NOTE: Some of these models may exceed
70 dB(A). When in close proximity to these models
hearing protection is required. Refer to the Techni
cal Data Sheet for your specific model.
MAINTENANCE AND INSPECTION
Intake filter and mufflers require periodic inspection and
replacement. Initial inspection is suggested at 500 hours,
then the user should determine the frequency thereafter.
Most problems can be prevented by keeping filters and
mufflers clean. Dirty filters and mufflers decrease pump
performance and can decrease pump life.
Filter Inspection and Replacement
The head surface(s) on some models can be very hot
during operation. Do not touch these parts until the
pump has been turned off and allowed to cool. Some
filter element(s) are held together by a snap fit. Remove
the cover to replace the felt, and reassemble.
SHUTDOWN PROCEDURES
Proper shutdown procedures must be followed to prevent
pump damage. Failure to do so may result in premature
pump failure. The Gast Manufacturing non-lubricated
vacuum pumps and compressors are constructed of
ferrous metals or aluminum which are subject to rust and
corrosion when pumping condensable vapors such as
water. Follow the steps below to assure correct storage
and shutdown between use:
Possible Reason
Low
Pressure
Low
Vacuum
Excessive
Noise
Over-
heating
Won't
Start
Dirty Filter X X
Dirty Muffler X X
Dirty Valves X X
Bent Valves X X
Damaged Cup X X
Low Voltage X X X X
Wrong voltage X X X
Pressure on Head X
Improper Cylinder
Shimming
X X
Relief Valve Set
Too High
X
Relief Valve Set
Too Low
X X
Leaky Hose X X
Leaky Check
Valve
X
Shutdown Procedure Conti.
1. NEVER oil this non-lubricated pump.
2. After using the pump, disconnect plumbing and allow
the pump to run "open" for at least 5 minutes before
shutdown.
3. Plug the open ports to prevent dirt or other
contaminents from entering the pump. It is now ready
for shutdown or storage.
TROUBLESHOOTING GUIDE
Service Kit(s) and repair instructions are available
upon request. Contact your local Represetative,
Distributor, or the factory for details.
NOTE: Gast will not guarantee the performance of
a field rebuilt pump. You can return the pump to an
Authorized Service Facility listed on the back page.