Hydromatic HPGFHX, Инструкция по установке и обслуживанию, Страница: 4 / 12

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parts because of wear or to inspect
for clogging:
1. Close gate valve at
pump discharge.
2. Turn off circuit breaker.
3. Remove pump from sump.
4. Unscrew cap screws and remove
cutter ring retainer.
5. Unscrew hex head cap screws
and remove volute case.
6. Radial cutter and axial cutter are
now exposed. If checking for
clogging, these parts can now be
cleaned without removing them
from the shaft.
7. If necessary to replace cutters,
remove serrated head cap screw
washer, radial cutter and impeller
from shaft while tapping with
a plastic hammer to loosen.
Disassemble radial cutter and
axial cutter from the impeller by
removing socket head cap screw.
8. Clean all parts thoroughly before
proceeding with assembly. Replace
impeller, axial cutter, and radial
cutter and secure together with
socket head cap screws. Make
sure impeller key is in place
between shaft and impeller.
Replace volute case, replace
grinder ring.
9. Plug pump into power and
operate for a few seconds only to
ensure parts are not rubbing.
Replacing Lower Seal:
Lower seal may be replaced by
an authorized Hydromatic service
facility without compromising
the hazardous location rating to
the pump.
NOTE: Anytime the seal is
disturbed, it must be replaced.
NOTE: When applying power, be
sure the pump is restrained from
turning by holding the pump at the
motor housing, or by clamping it in
a holding fixture.
CAUTION: Always keep hands
away from the pump cutter
area after the circuit breaker
is reconnected.
indicator light doesn’t come on. To
ensure continuity of the seal sensor
leads, a test light is provided on
intrinsically safe Hydromatic panels
as standard equipment.
Pump should be checked every three
months for corrosion and wear.
Field Service on Hydromatic
Hazardous Location Pumps:
If a Hydromatic hazardous location
pump is used in a hazardous
location, or if the pump is still in
warranty, the pump must be returned
to the factory for service or repaired
in an authorized Hydromatic service
shop. This will ensure the integrity
of the hazardous location rating
of the pump and comply with our
warranty requirements.
Disconnecting Pump Cords:
If a Hydromatic hazardous location
pump is to be removed from its
location, the pump cords may be
disconnected at control panel (on
sump mounted control panels) and
cord assembly taken with pump.
CAUTION: If cord openings from
sump to control panel are open,
gases from sump could enter panel
and an explosive condition could
exist. Seal the openings!
CAUTION: Do not reconnect power
to a cord and cap assembly while
removed from pump.
Replacing Cords:
The power cord and heat sensor/
seal failure cord are potted into the
connection box cap, forming the
cord and cap assembly.
If cords require replacement due to
damage or cords being too short,
cord and cap assembly must be
replaced as a complete assembly
available from factory.
Check pump for proper rotation
before returning to normal service.
Cutter Adjustment:
There is no cutter adjustment
necessary as all adjustments have
been factory set.
Replacing Grinder Parts:
If necessary to replace grinder
Pump
Troubleshooting
Below is a list of troubles and their
probable causes.
No liquid delivered.
1. Pump air bound
2. Discharge head too high
3. Pump or piping plugged
4. Wrong rotation
5. Speed too low
Insufficient liquid delivered.
1. Discharge head too high
2. Impeller or cutters partially
plugged or damaged
3. Wrong rotation
4. Incorrect diameter impeller
5. Speed too low
Insufficient discharge pressure.
1. Wrong rotation
2. Air or gases in liquid
3. Impeller damaged
4. Incorrect impeller diameter
5. Speed too low
Pump overloads motor.
1. Wrong rotation
2. Specific gravity or viscosity of
liquid too high
3. Speed too high
4. Head lower than rating, pumping
too much liquid
5. Pump clogged
6. Defective bearings
7. Defective impeller
Pump is noisy.
1. Defective bearings
2. No axial clearance between
impeller and volute
3. No axial clearance between
radial cutter and cutter ring
If the cause of the trouble cannot
be determined and corrected as
outlined above, contact your nearest
factory representative.