Jet R750 User manual

Lubrication
Use transformer oil, Shell Tellus Turbo
T or equal. The ball bearings are of the
closed design and permanently greased.
Inspecting the Hydraulic Parts
The pump housing (volute) and the
impeller should be visually inspected
every time an oil and stator inspection is
made. Change parts if excessive wear
has occurred or if performance of pump
has been impaired.
Note: If impeller is worn and in need of
replacing, always install new oil lip seals
and, on models with a shaft sleeve a new
shaft sleeve at the same time.
Inspecting Motor Cable
Carefully inspect the outer shield and the
wire endings. If the outer shield has been
damaged, water can enter the pump
through the core. The cable should
never be stretched by force and the
pump never lifted by the motor cable.
This could severely damage the cable
and the cable glands in the cable holder.
Perform continuity test on each lead.
Detailed Overhaul
A complete overhaul should be made
if water has been detected in the stator
housing, or if the pump has been in
daily use for a year. The intervals can
be increased if the pump has been
permanently installed as a sump pump
with automatic controls. Dismantle the
pump completely, replace damaged
or worn parts with new, original parts.
Clean all surfaces and check for cracks
or damage. If water is present in stator
housing and/or in oil chamber, replace
mechanical seals, O-rings, oil seal and
bearings.
SUBMERSIBLE PUMP
OPERATOR’S MANUAL
CONTENTS PAGE
Start-up Description.........................2
Electrical Connection.......................2
Handling...........................................2
Rotation of Impeller..........................2
Placing Pump...................................2
Liquid Temperature ..........................2
Submersion Depth...........................2
Cold Weather ...................................2
Troubleshooting ...............................3
- 1. Not starting...........................3
- 2. Low capacity or low head....3
- 3. Water in stator housing........3
- 4. Water in oil housing .............3
Overhaul ..........................................3
- General.....................................3
- Mechanical seal inspection......3
- Lubrication ...............................4
- Inspecting the hydraulic parts 4
- Inspecting the motor cable......4
Detailed Overhaul ............................4
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4

Start-up Description
Check that the voltage of the power
supply is the same as that marked on
the pump. When permanently installing
the pump, in a sump for example,
make sure that the holding capacity
of the sump is commensurate with the
capacity of the pump. If the sump is too
small the pump will stop and start too
often resulting in damage to the pump.
Recommended maximum start-ups per
hour is 6. If used with hose, check that
no kinks or restrictions are present.
Electrical Connection
Check that the power is off and the line
is disconnected before working on any
pump.
WARNING
Always disconnect power before
undertaking any work on a pump, cable,
control box or accessories.
Handling
Never lift a pump by its power cord.
Always lift by its handle or attach a rope
or wire cable to the handle or lifting
rings. Lifting by the power cord can
cause dangerous electrical shorts or
pump failure.
Rotation
Make sure that the impeller rotates in
the correct direction by tilting the pump
slightly to one side and starting up the
pump for a short moment. The pump
should twist in the opposite direction of
the attached arrow. The arrow shows the
running direction of the impeller.
Placing the Pump
Never place the pump on a loose or soft
bottom. It could sink in and fill the pump
housing with material, blocking water
flow to the impeller. Install the pump on
a solid bottom or hang the pump by a
wire. If the pump is being hung by wire,
it will have to be restricted from twisting
during start-up. This can be done by
securing the pump to one side of the
sump. Side discharge pumps should
always be kept submerged by 1/3 of the
pump for cooling effect. Stop and starts
not to exceed 6 times per hour, make
sure to size the pump according the
sump size and water inflow.
Liquid Temperature
The temperature of the water must not
exceed 120 degrees Fahrenheit.
Submersion Depth
The maximum depth is 33 ft. (10m)
or the length of the factory installed
electrical cable, whichever is less. If the
initial start depth in water is less than 3
inches, the pump must be primed.
Caution
Always mount control panels in a vertical
position and in a dry area above ground
near the pump. If outdoor installation
is unavoidable, make sure a suitable
control panel enclosure is used.
Cold Weather
The pump can not freeze as long as
it is submerged and in operation. If it
is removed from the liquid, empty the
pump, clean it and dry it. Then store
it in a place where the temperature is
not below 32 degrees Fahrenheit (0
Celsius). If the pump has been exposed
the freezing temperatures, let it thaw
slowly before it is started again. Never
thaw using flame or similar methods
as O-rings and other materials may be
damaged.
TROUBLE SHOOTING
General
1. Not Starting:
The cause could be the wrong voltage,
no power, a damaged cable, a bad fuse
or the thermal contactor has opened
due to an overheated motor caused by
locked rotor or wrong connections.
2. Low Capacity or Low Head:
The cause can be clogged passages, for
example the strainer, a damaged or worn
impeller or pump housing, broken pipes,
damaged or kinked hoses or discharge
pipe or too long or too narrow a hose.
This problem can also be caused by the
wrong rotation (3 phase only) due to
miswiring.
3. Water in the Stator Housing:
If water is found in the stator housing
the pump must be dismantled for a
complete overhaul and the stator dried
out. Probable causes: damaged, worn
shaft seals or bad O-rings. (Check
oil housing for water contamination.)
Change seals. Damaged cable entrance
(change).
4. Water in the Oil Housing:
Problem can be: Worn or damaged oil
lipseal and mechanical seals. Change
if needed. Leaking inspection plug or
oilhouse cover. Change elastomers.
If The Pump Does Not Start:
1. Check the power supply, testing
both voltage and amps.
2. Check any fuses and switches.
3. Check the cable, contactor and all
connections. Test for continuity.
Also test the stator for turn fault and
insulation to ground.
4. Make sure that the impeller is clean
and rotating freely.
IMPORTANT!
When troubleshooting always
follow local, provincial and federal
regulations regarding procedures and
safety. If the pump still does not start,
please contact the closest available
recommended repair shop.
OVERHAUL
General
If the pump, or the mechanical seals
are new, the oil should be checked after
15 hours of running. A second check
after 100 hours of use. After the initial
check ups, a periodic maintenance
check every 1,000 hours of running
will suffice if pump is used in relatively
clean water. If the liquid is very dirty or
laden with abrasive material, the pump
should be checked every 10, 50 and
100 hours. When inspecting the oil in
the oil housing, make sure that no water
is present. Change the O-ring under
the inspection plug each inspection.
Additional instructions can be found
under “Mechanical Seal Inspection.”
Mechanical Seal Inspection
Remove the oil inspection plug located
above the impeller. Tilt the pump so that
some oil is drained from the oil chamber.
If the oil is free from water and particles
the lower mechanical seal and the
oilseal ring are okay. Check that the oil
housing contains the correct quantity of
oil. If the oil is contaminated, (“milkish”
in appearance) remove and inspect the
seals. Change oil. Check oil again after
15 hours. Repeat the above steps. Use
oil as specified under “lubrication”:, on
page 4. When installing mechanical
seals, make sure a sleeve is used and
that the shaft is well lubricated with the
same oil as used in the oil housing.
2 3

R750 & R1500
D MODEL
R400 & R400D

SV400