Pentair AURORA 382 Operating instructions

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NOTE! To the installer: Please make sure you provide this manual to the owner of the equipment or to the responsible
party who maintains the system.
INSTRUCTION AND REPAIR MANUAL
VERTICAL INLINE
CENTRIFUGAL PUMP
ENGLISH: PAGES 2-8
Instruction and Repair Manual
NOTE! To the installer: Please make sure you provide
this manual to the owner of the equipment or to the
responsible party who maintains the system.
AU1054 | © 2018 Pentair plc. | 07/11/18
Models
382
AURORA

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APPLICATIONS:
The 382 model is a superior commercial in-line
pump which has been manufactured and field tested
under the severest demands of high temperature
condensate service and boiler feed applications for
many years. Pumping applications include hot or
chilled water circulation, pressure booster systems,
and cooling towers for office buildings, hotels,
hopitals, universities and warehouses.
OPERATIONAL LIMITS:
Maximum Operating Pressure: 175 psi
Maximum Operating Temperature: 225°F (107°C)
ATTENTION: SAFETY WARNINGS:
Read and understand all warnings before installation
or servicing pump.
CALIFORNIA PROPOSITION 65 WARNING:
This product and related accessories
contain chemicals known to the State of California
to cause cancer, birth defects or other reproductive
harm.
ELECTRICAL SAFETY:
Electrical Shock Hazard
All electrical connections are to be made by a
qualified electrician in accordance with all codes
and ordinances. Failure to follow these instructions
could result in serious personal injury, death or
propertydamage.
Electrical Overload Hazard
Ensure all motors have properly sized overload
protection. Failure to follow these instructions
could result in serious personal injury, death or
property damage.
Sudden Start-Up Hazard
Disconnect and lock out power source before
servicing. Failure to follow these instructions could
result in serious personal injury, death or property
damage.
HIGH TEMPERATURE SAFETY:
Hot Surface Hazard
If pumping hot water, ensure guards or proper
insulation is installed to protect against skin contact
to hot piping or pump components. Failure to follow
these instructions could result in serious personal
injury, death or property damage.
Spraying Water Hazard
When servicing pump replace all gaskets and seals.
Do not reuse old gaskets or seals. Failure to follow
these instructions could result in serious personal
injury, death or property damage.
HIGH PRESSURE SAFETY:
High Pressure Hazard
The pump is rated at a maximum of 175 psi (155 psi).
Do not exceed this pressure. Install properly sized
pressure relief valves in system. Failure to follow
these instructions could result in serious personal
injury, death or property damage.
Expansion Hazard
Water expands when heated. Install properly sized
thermal expansion tanks and relief valves. Failure
to follow these instructions could result in serious
personal injury, death or property damage.

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LOCATION:
The pump should be installed in a clean, heated
and well ventilated area that allows access for
inspection, cleaning and proper maintenance.
Sufficient space should be provided for installation
and removal.
INSTALLATION:
The 1590 and 1590SC pumps must be installed
vertically. Install isolating valves on each side of
pump so pump maintenance can be performed
with out draining the system. Special mounting
requirements may be required if the pump is to be
mounted near a noise or vibration sensitive area.
A minimum length of straight pipe is required on
the suction side of the pump. Five times the pipe
diameter is sufficient to allow a smooth entry of
water into the pump.
Suction and discharge piping must be in line. Do
not use pump casing to force the alignment of the
piping. Properly support the piping to provide a rigid
support for the pump. Tighten pump flanges evenly
to prevent flange cocking and liquid leakage. Do not
reuse old gaskets.
ELECTRICAL CONNECTIONS:
Electrical Shock Hazard
All electrical connections are to be made by a
qualified electrician in accordance with all codes
and ordinances. Failure to follow these instructions
could result in serious personal injury, death or
propertydamage.
Electrical Overload Hazard
Ensure all motors have properly sized overload
protection. Failure to follow these instructions
could result in serious personal injury, death or
property damage.
Sudden Start-Up Hazard
Disconnect and lockout power source before
servicing. Failure to follow these instructions could
result in serious personal injury, death or property
damage.
START-UP:
The pump must be filled with water before start-up
or the mechanical seal will not be lubricated and
will fail. Loosen vent plug on pump casing to ensure
all air is vented from casing and the casing is filled
with water.
Hot Surface Hazard
If pumping hot water, ensure guards or proper
insulation is installed to protect against skin contact
to hot piping or pump components. Failure to follow
these instructions could result in serious personal
injury, death or property damage.
Spraying Water Hazard
When servicing pump, replace all gaskets and seals.
Do not reuse old gaskets or seals. Failure to follow
these instructions could result in serious personal
injury, death or property damage.
Avoid all situations where pipe stain may be
transferred to the pump casing. Expansion fittings
and pipe hangers located close to the pump may be
required. Do not force the piping to match the pump
suction and discharge flanges. Recut the piping to
avoing this situation.
All electrical connections are to be completed by a
qualified electrician. Ensure properly sized overload
protection isinstalled.
1. Check that the current supply agrees with
the voltage and frequency of the motor
nameplate.
2. Check that the motor is wired for correct
voltage.
3. Check that thermal overload relays are correct
size and set for operation.
OPERATING:
Ensure the system is filled with water and vented
prior to pump start up. The pump rotation is
clockwise when viewed from the back of the motor.
Do not run the pump dry or the mechincal seal will
be destroyed.

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TROUBLESHOOTING:
IF MOTOR FAILS TO START:
1. Wrong voltage, wiring hookup incorrect.
Switches not set.
2. Rotating element may be bound due to clog in
impeller pipe strain.
3. Tripped thermal overload relay or blown fuses.
4. Starter contacts may be shorted or corroded.
Terminal connections may be broken at some
point in the circuit.
LOST PRIME:
1. Suction pressure too low.
2. Leaks in suction piping connections.
3. High level of air entrainment.
LOW OR NO WATER FLOW:
1. Speed may be low; check for low voltage.
2. The impeller may be clogged or damaged or
suction and discharge lines partially clogged.
3. Valves may not be fully open.
4. Pump not primed.
5. Suction pressure may be low.
6. Required discharge pressure may be greater
than originally anticipated.
NOISE OR VIBRATION:
1. Partially clogged impeller resulting in
imbalance.
2. Cavitation, net positive suction head available
is too low.
3. Pump fully primed.
4. Foundation improperly secured or not strong
enough.
5. Piping not anchored securely.
6. Rotating element binding due to damaged
shaft, worn bearings or pipe strain.
MAINTENANCE AND SERVICE TO THE PUMP:
The 382 pumps require no regular service other
than periodic inspection and occasional cleaning.
A periodic inspection must be performed looking
for seal leaks indicating the mechanical seal is
worn out and any unusual noise or vibration that will
Fig. B. Casing, Gasket and Wearing
Ring Removed.
Fig. A. Assembled Unit.

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indicate other pump components require service/
repair. The motor may require lubrication; the
motor manufacturer’s recommendation should be
followed.
SERVICE:
Your 382 Aurora pump requires no maintenance
other than periodic inspection and occasional
cleaning.
The intent of inspection is to prevent breakdown,
thus obtaining optimum service life. The pump is
lubricated by the liquid being pumped and therefore
does not require periodic lubrication. The motor,
however, may require lubrication, in which case,
the motor manufacturer’s recommendation should
be followed.
REPAIRS
Refer to the exploded pump diagrams for item
numbers.
The pump may be disassembled using the
illustrations and text provided. Although complete
disassembly is covered, it will seldom be necessary
to completely disassemble your Aurora pump.
The illustrations accompanying the disassembly
instructions show the pump at various stages of
disassembly. The illustrations are intended to aid in
the correct identification of the parts mentioned in
the text.
Inspect removed parts at disassembly to determine
their reusability. Cracked castings should never be
reused. Gaskets should be replaced at reassembly
simply as a matter of economy; they are much
less expensive to replace routinely than to replace
as the need occurs. In general it is economical to
return to the manufacturer for repair only to the
motor and motor controller.
DISASSEMBLY:
Disassemble only what is needed to make repairs or
to accomplish inspection. Proceed to disassemble
the pump as follows:
1. Break electrical connections to prevent
any possibility of pump starting during
disassembly.
2. Remove plugs (4) from casing (6) to drain
pump.
3. Remove all relief, cooling, flushing, or drain
lines from the pump, including compression
connections (1 and 2) and tubing (3). Break
suction and discharge connections only if it
is desired to remove casing (6).
4. Remove capscrews (5) and lift pump assembly
from casing (6). Remove gasket (8).
5. Unscrew impeller screw (9) and remove
washer (9A) taking care not to damage gasket
(9B).
6. Slide impeller (11) and impeller key (12) from
shaft, again taking care not to damage gasket
(10) located behind the impeller. Remove
gasket (10).
7. Wearing ring(s) (7 & 16) are pressed into their
housings with an interference fit, and must
be removed with a puller. New ring(s) should
be used for reassembly, since it is likely that
during removal this fit will be lost.
8. Impeller wear rings (optional – 14 and 15) are
pressed on and must be cut off if replacement
is necessary. If they are turned off on a lathe,
take care not to cut into the impeller.
Fig. C. Impeller, O-Ring Removal.

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9. Slide sleeve (25) with rotating parts of
mechanical seal (27) from the shaft. The
sleeve should be carefully cleaned to remove
any residue that may be remaining in the seal
area. The rubber in the seal (27) may have
become partially adhered to the sleeve. The
sleeve must also be checked for abrasion or
corrosion that can occur when fluid residue
penetrates between the seal (27) and the
sleeve (25). The sleeve under the seal may
be polished lightly to a 32RMS finish before
reassembly. Do not reuse a pitted sleeve. Pin
(61) may be removed if necessary.
CAUTION:
The mechanical seal (see Figure 1) is a precision
product and must be treated as such. During
removal, great care must be taken to avoid
dropping any part of the seal. Take particular care
not to scratch the lapped faces on the washer
or the sealing seat. Do not put a seal back into
service until the sealing faces of the washer and
seat have been lapped or replaced.
10.Unscrew capscrews (32) and remove bracket
(35) from the motor.
11. The seal flexible cup and stationary seat
should be pressed out of the bracket and the
cavity cleaned of all residue. Make sure that
the 1/32 inch radius in the seal seat cavity
is not damaged during disassembly since a
sharp edge can easily cut the flexible cup
during reassembly.
12. Remove nameplate (34) and screws (33) only if
replacement is needed.
REASSEMBLY:
Reassembly will generally be in reverse order of
disassembly. If disassembly was not complete, use
only those steps related to your particular repair
program.
1. The mechanical seal (27) (see Figure 1) cannot
be installed as an assembly. It is necessary to
have the seal seat properly in place before the
balance of parts can be added. Thoroughly
Fig. 1 Mechanical Seal.
Fig. E. Bracket, Seal Flexible Cup and Stationary Seal Removed.
Fig. D. Mechanical Seal Removed.

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inspect the seal cavity in the bracket for
burrs or nicks which could damage the seat
of the seal. Apply a film of soap paste or flax
soap (do not use oil or grease) to the seal seat
and install, taking care to seat it evenly and
squarely.
NOTE: If it is not possible to insert seat with fingers,
place cardboard protecting ring furnished with seal
over lapped face of seat and press into place with a
piece of tubing having end cut square. The tubing
should be slightly larger than the diameter of the
shaft. Remove cardboard after seat is firmly in
place.
2. Position bracket (35) on the motor and secure
with capscrews (32). Tighten screws evenly to
assure properalignment.
3. If nameplate (34) was removed, install and
attach with screws (33).
4. Wipe the sealing faces of the seat and seal
washer clean. Oil these surfaces with a clean
light oil. Lightly oil the shaft sleeve (25).
Slide the entire rotating assembly onto the
sleeve. The shaft sleeve with the seal rotating
assembly on it may now be replaced on the
motor shaft. Spring tension will probably
prevent the sleeve from remaining in position
axially until the impeller is locked against it.
5. Press wearing ring(s) (7 & 16) in casing (6) and
bracket (35). Rings should not be hammered
into place. Use a press, or clamp the parts in
a bench vise, using wooden blocks to protect
the rings. It may be necessary to pin or dowel
the rings after assembly if the insert or casing
has had rings replaced before, since each
reassembly can stretch or tear metal and
thereby loosen the fits. If the facilities are
available, it is good practice to take a very
light finish cut or to ream the inside diameter
of the casing rings after pressing to restore
roundness. When rings are pressed, they may
get squeezed out of shape.
6. Place impeller wearing rings (optional – 14 and
15) on impeller (11), using the same care as for
the case wearing rings. If the rings are to be
trued on a lathe, do not clamp the impeller so
tightly that it is permanentlydistorted.
7. Carefully place gasket (10) on motor end of
impeller. Assembly key (12) and impeller (11) to
motor shaft. Secure impeller with gasket (9B),
washer (9A), and impeller screw (9).
8. Install the four pipe plugs (4) in the pump
casing. Position the gasket (8) and casing (6)
against the motor bracket and secure with
screws (5).
9. Replace all relief, cooling, flushings, or drain
lines from the pump including compression
connections (1 and 2) and tubing (3). Connect
discharge piping and suction piping if
required, making sure to install gaskets on
the flanged connections. Connect electricity
to motor.
10.Read starting instructions before attempting
to start pump.
STARTING PUMP AFTER REASSEMBLY
Do not start pump until all air and vapor has been
bled and until making sure that there is liquid in
the pump to provide the necessary lubrication.
Without the fluid around it, the seal may be ruined
in a few seconds of operation. It is possible that
the mechanical seal may drip during the first few
minutes to one hour of operation.

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NOTES:
1. Bronze fitted construction will be furnished as standard unless specified.
2. Refer to factory for special alloys.
3. Fairbanks Nijhuis reserves the right to substitute materials without notice.
4. Piece numbers 14 and 15 are not furnished as standard. When furnished, impeller must be modified.
WHEN ORDERING SPARE PARTS ALWAYS INCLUDE THE PUMP TYPE, SIZE, SERIAL NUMBER, AND THE PIECE NUMBER FROM THE
EXPLODED VIEW IN THIS MANUAL.
ORDER ALL PARTS FROM YOUR LOCAL AUTHORIZED DISTRIBUTOR, FACTORY BRANCH SALES OFFICE OR THE FACTORY AT NORTH
AURORA, ILLINOIS.
Fig. 2 Model 382 Exploded View. Boldface numbers indicate recommended spare parts.
Model 382 List of Parts
1. Elbow
2. Connector
3. Tubing
4. Plug, Pipe
5. Capscrew
6. Casing
7. Wear Ring
8. Gasket
9. Impeller Screw
9A. Washer
9B. Gasket
9C. Capscrew Seal
10. Gasket
11. Impeller
12. Impeller Key
14. Wear Ring
15. Wear Ring
16. Wear Ring
25. Sleeve
27. Seal
32. Capscrew
33. Screw
34. Nameplate
35. Bracket
61. Pin
27
9
9A
9C
9B
14
11
15
12
10
61
25
16 5
32
35
34
3
3
4
6
1
8
74
4
2
33