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SECTION 6 ITEM 3310
DATED JUNE 1, 2007
INSTRUCTION, INSTALLATION,
MAINTENANCE AND REPAIR MANUAL
MODEL 3310
IMPORTANT NOTE TO INSTALLER:
This manual contains important information about the installation, operation and safe use of this product. This information
should be given to the owner/operator of this equipment.
APPLICATIONS:
The 3310 Series pumps are frame mounted or close coupled.
They feature high efficiency, rugged construction, foot mounted
volutes with back pullout power frames, center drop out spacer
coupling (optional) and re-greaseable ball bearings. The pump’s
bronze fitted construction is suitable for unheated domestic and
fresh water, condensate, boiler feed water, pressure boosting
and hydronic coding and/or heating.
ATTENTION: SAFETY WARNINGS:
Read and understand all warnings before installation or servicing pump.
OPERATIONAL LIMITS: *
Maximum Operating Pressure:
290 psi at Temperatures
to 300 F (148°C)
O
* See ASTM A126/ANSI B16.1 for pressure/temperature ratings of flanges.
ELECTRICAL SAFETY:
Warning: 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.
Warning: Electrical Overload Hazard
Insure all motors have properly sized overload protection.
Failure to follow these instructions could result in serious
personal injury, death or property damage.
Warning: 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.
6
HIGH TEMPERATURE SAFTEY:
Warning: Hot Surface Hazard
If pumping hot water, insure guards or proper insulation is
installed to protect against skin contact with hot piping or
pump components. Failure to follow these instructions could
result in serious personal injury, death or property damage.
Warning: Spraying Water Hazard
When servicing pump replace all gaskets and seals. Do not
re-use old gaskets or seals. Failure to follow these instructions could result in serious personal injury, death or property damage.
HIGH PRESSURE SAFTEY:
Warning: High Pressure Hazard
The pump is rated at a maximum of 290 psi at 300°F. 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.
Warning: 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.
INSTALLATION:
Read and understand all safety warnings at the beginning of
the manual before beginning installation or any repair
work.
PUMP LOCATION. You have probably spent considerable time
planning where your pump will be located. However, you may
have overlooked some factor that may affect pump operation or
efficiency.
The pump should be located as close to the liquid source as possible so that the suction line can be short and direct. It should be
located in a clean, open area, where it is easily accessible for
inspection, disassembly, and repair. Pumps installed in dark, dirty
areas or in cramped locations are often neglected which can
result in premature failure of both the pump and the driver.
MODEL 3310
3310 series pumps may be mounted horizontally or vertically.
Install isolating valves on each side of pump so pump maintenance can be performed without draining the system. Special
mounting requirements may be required if the pump is to be
mounted near a noise or vibration sensitive area.
The installation must be evaluated to ensure that the net positive
suction head available (NPSHA) meets or exceeds the net positive suction head required (NPSHR), as stated by the pump performance curve.
FOUNDATION. The foundation for your pump must be sufficiently rigid to absorb any vibration and stress encountered during pump operation. It must also be sufficient to withstand any
pipe load transmitted through the volute. A raised foundation of
concrete is preferable for most floor-mounted pumps. The
raised foundation assures a satisfactory base, protects against
flooding, simplifies moisture drainage, and facilitates keeping
the area clean.
Your pump should be firmly bolted to the foundation, whether it
is a raised concrete base, steelwork wall, or structural member.
The mounting bolts or lag screws should be accurately located
per the applicable Aurora dimension sheet. Refer Fig. 1.
LEVELING THE PUMP. Leveling the pump will require
enough shims to support the base plate near the foundation
bolts, and at any points of the base plate carrying a substantial
weight load. The shims should be large enough to allow a gap
of 3/4" to 1-1/2"' between the base plate and foundation for
grouting.
IMPORTANT: The pump base must be set level to avoid any
mechanical difficulties with the pump or motor. The 3310 pump
was properly aligned, if supplied with a motor, at the factory.
However, since the pump base is flexible, it may spring and
twist during shipment. Do not make any piping connection to
the pump until it is realigned. Realign the pump after piping is
completed and after the base is grouted in and bolted down.
NOTE: It may be necessary to readjust the alignment from time
to time while the unit and foundation are new. Realignment will
prevent premature bearing failure, excessive vibration, or shaft
failure.
Ensure that proper hydronic accessories such as pressure relief
valves, thermal expansion tanks, and flow/pressure control
devices are installed in the system. Consult the responsible
party for your system to ensure these devices are installed and
of the proper size.
GROUTING THE INSTALLATION. The area below the
Figure 1. Foundation for Frame Mounted Pumps.
SOUPY GROUT
FOUNDATION BOLTS
ROLLED STEEL BASE
TWISTED TENSION WIRE
SHIMS TO LEVEL BASEPLATE
WOODEN DAM
ON BOTH SIDES
Figure 2. Grouting the Base for Frame Mounted Pumps.
volute feet must be grouted prior to operation. Grouting the
base plate prevents lateral movement of the base plate and
improves the vibration absorbing characteristics of the foundation by increasing its mass. A wooden dam should be constructed around the base plate to contain the grout while it is being
poured. The dam can be built tight against the base plate, or
slightly removed from it as desired. Refer Fig. 2.
The entire base plate should be completely filled with nonshrinkable type grout. The grout should be puddled frequently
to remove any air bubbles from the grout.
Warning: 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.
STRAIGHT EDGE
WEDGE OR
THICKNESS GAUGE
PARALLEL
MISALIGNMENT
2
ANGULAR
MISALIGNMENT
Figure 3. Flexible Coupling Alignment.
PERFECT
ALIGNMENT
MODEL 3310
ROTATION: Pump rotation is clockwise when viewed from
the motor end.
Discharge Piping
Gate Valve
INITIAL ALIGNMENT OF THE FLEXIBLE COUPLING.
The pump and driver were accurately aligned at the factory.
However, it is impossible to maintain this alignment during
shipping and handling. Therefore it will be necessary for you to
realign the pump and driver. Flexible couplings are not universal joints. They should not be used to compensate for misalignment of the pump and motor shafts. Their function is to transmit
power from the driver to the pump while compensating for thermal expansion and shaft end movement. The coupling faces
should be far enough apart so that they do not make contact
when the motor shaft is forced to the limit of the bearing clearance toward the pump shaft.
In order to properly align the coupling, you will need a taper
gauge, or set of feeler gauges, and a straight edge.
There are two types of misalignment encountered with flexible
couplings: angular misalignment, in which the shafts are not
parallel, and parallel misalignment where the shafts are parallel
but not on the same axis.
To check angular alignment, insert a feeler gauge or taper gage
at any four places 90° apart around the coupling halves. Insert
shims under the driver feet until the same reading is obtained at
all four checkpoints. The pump and driver will then be in angular alignment.
To check parallel alignment, a straight edge should be held
against the edges of the coupling halves at any four places 90°
apart around the coupling. The straight edge should be parallel
to the pump and driver shafts at all times. Insert shims until the
straight edge lies flat against both coupling halves at all four
checkpoints. The pump and driver will then be in proper parallel alignment. Refer Fig. 3.
For fine alignment, 3500 RPM operation, for all other coupler types.
A dial indicator should be used when greater alignment accuracy is required. Use the following alignment tolerances unless
specified otherwise by the coupling manufacturer. On sleeve
type couplings make sure there is at least 1/8” end clearance
between the sleeve and the two coupling halves.
CORRECT
ECCENTRIC
TAPERED
REDUCER
POTENTIAL FOR
AIR POCKET
INCORRECT
Figure 4. Installation of Tapered Reducers.
Suction Piping
Gate Valve
Check Valve
Figure 5. Gate Valve and Check Valve.
To check angular misalignments, mount the dial indicator base
to the coupling half and position the dial indicator button on the
front or rear face of the opposite coupling half. Set the dial to
zero, rotate both coupling halves together, making sure the indicator button always indicates off the same spot. Misalignment
within 0.004 inches TIR per inch of coupler radius is permissible.
To check parallel misalignment, mount the dial indicator base to
one coupling half, or shaft, and position the dial indicator button
on the outside diameter of the opposite coupling half. Set the
dial to zero. Rotate both coupling halves together making sure
the indicator button always indicates off the same spot.
Misalignment within 0.004 inches TIR is permissible.
PIPING:
SUCTION PIPING. The suction piping should be short and
direct with as few elbows and fittings as possible to keep head
loss from friction to a minimum. A horizontal suction line
should have a gradual rise to the pump, and pass under any
interfering piping. The suction pipe diameter should be at least
the same diameter as the suction nozzle on the pump, and
preferably larger. Use of a smaller diameter pipe will result in
loss of head due to friction. All joints must be tight to maintain
prime on the pump.
REDUCERS. For vertically mounted configuration installations, eccentric reducers should be installed directly at the suction nozzle with the taper at the bottom to prevent air pockets
from forming. Straight taper reducers should never be used in a
vertically mounted installation suction line because of the air
pocket that is formed at the leg of the reducer and the pipe.
Either eccentric or concentric reducers may be used for horizontally mounted installations. Refer Fig. 4.
DISCHARGE PIPING. Discharge piping should also be short
and direct as possible, with few elbows and fittings, to reduce
head loss from friction.
PIPE. The discharge pipe diameter should be the same as, or
larger than, the discharge nozzle diameter.
DISCHARGE VALVES. The discharge piping should include
a check valve and a gate valve. The check valve should be
located between the gate valve and the pump. If an increaser is
used in the discharge piping, the increaser should be installed
between the pump nozzle and the check valve. The check valve
protects against a reverse flow of the liquid if the driver fails.
Refer Fig. 5.
3
MODEL 3310
The gate valve is used in the priming operation, as a throttling
valve to control pump volume, and to shut down the pump for
inspection and maintenance.
Warning: High Pressure Hazard
In dry locations, each bearing will need lubrication at least after
every 4,000 hours of running time or 6 to 12 months - whichever is more frequent. In wet locations (exposed to dripping water,
to the weather or to heavy condensation found in unheated or
poorly ventilated underground locations) every 2,000 hours or
every 3 to 6 months - whichever is more frequent.
Warning: Spraying Water Hazard
LUBRICATION:
Use Chevron SRI, NLGI2.
Lubricate motor per motor manufacturer’s instructions.
GENERAL INSTRUCTIONS:
1. Keep this pump and motor properly lubricated.
2. When there is a danger of freezing, drain the pump.
3. Inspect the pump regularly for leaky seals, gaskets and loose
or damaged components. Replace or repair as required.
ELECTRICAL WIRING. Normally, your pump will be supplied with an attached drive motor. The motor should be wired
in accordance with the wiring diagram found on the motor
nameplate. Be sure the voltage, frequency, and phase of your
power supply corresponds with the nameplate data. It is advisable to provide a separate switch and overload protection for
your pump motor to protect against power failure in some other
area. Conversely, if the pump motor develops electrical problems, it will be isolated from other equipment.
PRESTARTING INSTRUCTION. The coupling halves
should be connected. Prior to connection, however, the drive
motor should be started to make sure of proper pump rotation.
Do not start pump until all air and vapor has been bled. This
ensures 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 normal for the mechanical
seal to drip during the first few minutes to one hour of operation.
Warning: 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.
PUMP DISASSEMBLY: For frame mounted pumps, model
3314.
Read and understand all safety warnings at the beginning of the
manual before beginning installation or any repair work.
Warning: Hot Surface Hazard
If pumping hot water, insure guards or proper insulation is
installed to protect against skin contact with hot piping or
pump components. Failure to follow these instructions could
result in serious personal injury, death or property damage.
1. Ensure the electrical power is locked out, the system pressure has been lowered to 0 psi and temperature of the unit is
at a safe level before beginning any disassembly of the
pump.
4
The pump is rated at a maximum of 290 psi at 300°F. 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.
When servicing pump replace all gaskets and seals. Do not
re-use old gaskets or seals. Failure to follow these instructions could result in serious personal injury, death or property damage.
2. Isolate the pump from the system by closing the valves that
should be located on both the suction and discharge of the
pump. Loosen the drain plugs (4) at the bottom of the casing
and drain the pump. Remove all relief, cooling, flushing, or
drain lines from the pump.
Inspect removed parts at disassembly to determine if they can
be reused. Ball bearings that turn roughly or show wear should
be replaced. Cracked castings should never be reused. Scored or
worn pump shafts should be replaced. Gaskets should be
replaced at reassembly simply as a matter of economy. They are
much less expensive to replace routinely than to replace singly
as the need arises.
Warning: High Pressure Hazard
Make certain that the internal pressure of the pump is relieved
before continuing. Failure to follow the instructions could
result in serious person injury, death, or property damage.
3. Remove the coupling guard.
4. Loosen the sets crews in both coupling halves and slide each
half back, as far as possible on its shaft. Then, remove the
coupling sleeve.
5. Loosen, but do not remove, the volute capscrews (5). Use
capscrews in the jackscrew holes to loosen the pump rotating assembly from the volute (6).
6. Now remove the volute capscrews (5) and remove the
power frame and rotating assembly from the volute (6).
7. Optional case wearing ring (7) is pressed into volute with an
interference fit, and must be removed with a puller. New
rings should be used for reassembly since it is likely that
during removal this fit will be lost.
8. Remove the impeller capscrew (9), impeller washer (9A)
and impeller washer gasket (9B), and bolt gasket (9C).
Remove impeller (11).
9. Remove impeller key (12).
10. Remove the shaft sleeve (25), shaft sleeve gasket (10), and
rotating portion of the mechanical seal (head).
MODEL 3310
CAPSCREW TORQUE FOR COMMON BOLT DIAMETERS
CAPSCREW
TYPE
SAE Grade 5
HEAD
MARKING
IN-POUNDS
1/4”
5/16”
85
180
UNITS
DIN CLASS 8.8
(SAE Grade 5)
KILOGRAM
METERS
FT-LBS
7/16”
43
M4
M6
M8
M10
M12
M14
M16
.57
1
2.5
5
8
13
20
7
18
32
58
94
144
4
Table 1. Torque Chart
CAUTION
11. Remove the seal stationary seat and flexible cup.
12. Unscrew capscrews (32) and remove power frame (57) from
the seal plate (35).
13. Thoroughly clean the shaft sleeve (25) and seal plate seal
cavity. Replace the shaft sleeve (25) or seal plate (35) if
there is evidence of surface damage like pitting, corrosion,
nicks, or scratches.
14. Lubricate the shaft sleeve (25) and seal plate (35) with soap
and water or P-80 rubber emulsion. Do not use petroleum
lubricant. Install a new stationary seat and flexible cup
down into the seal plate. Ensure that the stationary seat and
flexible cup are fully inserted into the seal plate cavity.
15. Attach seal plate (35) to power frame (57) with capscrews
(32).
16. Slide shaft sleeve (25) on to the short end and a new rotating seal assembly (27) on to the shaft sleeve (25) until the
head is tight against the stationary seat.
The mechanical seal (27) (see Figure 6) is a precision product and must be treated as such. During installation, great
care must be taken to avoid dropping any part of the seal.
Take particular care not to scratch the lapped faces on the
head or stationary seat.
17. Install a new sleeve gasket (10).
18. Install a new impeller key (12).
19. Install impeller (11), impeller washer (9A), new impeller
washer gasket (9B), bolt gasket (9C), and capscrew (9).
Tighten capscrew per torque chart (see Table 1).
20. Press wearing ring (7) into volute (6) if equipped. Ring
should not be hammered into place. Use a press, or clamp
the parts into a bench vise, using wooden blocks to protect
the ring. It may be necessary to pin or dowel the ring after
assembly if the insert or volute has had rings replaced
Warning: Sudden Start-Up Hazard
3/8”
27
FOOT-POUNDS
1/2” 5/8”
3/4”
65
130
230
Disconnect and lockout power source before servicing.
Failure to follow these instructions could result in serious
personal injury, death or property damage.
before, since each reassembly can stretch or tear metal and
thereby loosen the fit. If the facilities are available, it is
good practice to take a very light finish cut or to ream the
inside diameter of the ring after pressing to restore roundness. When rings are pressed, they may get squeezed out of
shape.
21. Install new casing gasket (8). Then install the rotating
assembly into the volute (6).
22. Tighten volute capscrews (5) per torque chart (see Table 1).
23. Install and align coupling.
24. Install drain plugs (4).
25. Reinstall the coupling guard.
26. Open isolation valves and inspect pump for leaks.
27. Return pump to service.
PUMP DISASSEMBLY FOR CLOSED COUPLED
PUMPS, MODELS 3311 & 3312:
Read and understand all safety warnings at the beginning of
the manual before beginning installation or any repair
work.
1. Ensure the electrical power is locked out, the system pressure has been lowered to 0 psi and temperature of the unit is
at a safe level before beginning any disassembly of the pump.
2. Isolate the pump from the system by closing the valves that
should be located on both the suction and discharge of the
pump. Loosen the drain plug (4) at the bottom of the casing
and drain the pump. Remove all relief, cooling, flushing, or
drain lines from the pump.
Warning: Hot Surface Hazard
If pumping hot water, insure 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.
Warning: High Pressure Hazard
Make certain that the internal pressure of the pump is
relieved before continuing. Failure to follow the instructions
could result in serious person injury, death, or property damage.
5
MODEL 3310
Inspect removed parts at disassembly to determine if they can
be reused. Ball bearings that turn roughly or show wear should
be replaced. Cracked volutes (6) should never be used. Scored
or worn pump shafts should be replaced. Gaskets should be
replaced at reassembly simply as a matter of economy. They are
much less expensive to replace routinely than to replace singly
as the need arises.
3. Remove motor foot capscrews. Loosen the volute capscrews
(5), but do not remove them. Using the capscrews in the
jackscrew holes, start to remove the rotating assembly from
the volute (6).
4. Remove the volute capscrews (5) and remove the rotating
assembly.
5. Remove the impeller capscrew (9), impeller washer (9A),
impeller washer gasket (9B), and bolt gasket (9C).
6. Remove the impeller (11).
7. Remove impeller key (12).
8. Remove the shaft sleeve (25), shaft sleeve gasket (10), and
rotating portion of the mechanical seal (head).
9. Remove the seal stationary seat and flexible cup.
10. Unscrew capscrews (48) and remove bracket (36) from the
motor.
11. Thoroughly clean the shaft sleeve (25) and the seal
plate or motor bracket, seal cavity. Replace the shaft sleeve,
seal plate (35), or motor if there is evidence of surface damage like pitting, corrosion, nicks or scratches.
Head
6
12. Lubricate the shaft sleeve (25) and seal plate (36) of motor
bracket with with soap and water or P-80 rubber emulsion.
Do not use petroleum lubricant. Install a new stationary seat
and flexible cup down into the seal plate or the motor bracket. Ensure that the stationary seat and flexible cup are fully
inserted into the seal plate cavity or motor bracket.
13. Slide a new rotating seal assembly (27) onto the shaft sleeve
(25) until the head is tight against the stationary seat.
The mechanical seal (27) (see Figure 6) is a precision product
and must be treated as such. During installation, great care must
be taken to avoid dropping any part of the seal. Take particular
care not to scratch the lapped faces on the head or stationary
seat.
14. Install a new sleeve gasket (10).
15. Install new impeller key (12).
16. Install impeller (11) new impeller washer gasket (9B),
impeller washer (9A), bolt gasket (9C), and capscrew (9).
17. Install a new casing gasket (8). Then install the rotating
assembly into volute (6).
18. Tighten volute capscrews (5) per torque chart (see Table 1).
19. Install drain plug (4).
20. Open isolation valves and inspect pump for leaks.
21. Return pump to service.
Stationary
Seat
Figure 6. Mechanical Seal.
Flexible
Cup
MODEL 3311/33112 LIST OF PARTS
4.
5.
6.
7.
8.
9.
9A.
9B.
9C.
10.
11.
12.
25.
27.
32.
35.
36.
48.
Pipe Plug
Bolts
Casing
Casing Wear Ring
Gasket
Capscrew
Impeller Washer
Impeller Gasket
Bolt Gasket
Sleeve Gasket
Impeller
Key
Sleeve
Mechanical Seal
Bolts
Seal Plate
Motor Bracket
Bolts
MODEL 3314 LIST OF PARTS
4.
5.
6.
7.
8.
9.
9A.
9B.
9C.
10.
11.
12.
25.
27.
32.
35.
48.
57.
Pipe Plug
Bolts
Casing
Casing Wear Ring
Gasket
Capscrew
Impeller Washer
Impeller Gasket
Bolt Gasket
Sleeve Gakset
Impeller
Key
Sleeve
Mechanical Seal
Bolts
Seal Plate
Bolts
Power Frame
NOTES:
1. BRONZE FITTED CONSTRUCTION WILL BE FURNISHED
2. AURORA PUMP RESERVES THE RIGHT TO SUBSTITUTE MATERIALS WITHOUT
NOTICE
NOTE
WHEN ORDERING SPARE PARTS ALWAYS INCLUDE THE PUMP
TYPE, SIZE, SERIAL NUMBER, THE PIECE NUMBER FROM THE
EXPLODED VIEW IN THIS MANUAL AND THE PART NUMBER.
ORDER ALL PARTS FROM YOUR LOCAL AUTHORIZED
DISTRIBUTOR, OR THE FACTORY AT NORTH AURORA, ILLINOIS.
7
MODEL 3311/3312
NOTE: Recommended spare parts shown in bold face type.
8
Figure 7. Model 3311/3312 Exploded View.
MODELS 3314
NOTE: Recommended spare parts shown in bold face type.
Figure 8. Model 3314 Exploded View.
9
NOTES
10
NOTES
11
AP-Sect. 6 - Item 3310 07.05
NOTE:
Aurora Pump reserves the right to make revisions to its products and
their specifications, this bulletin and related information without notice
12
Aurora Pump
800 Airport Road
North Aurora, IL 60542
phone: 630-859-7000
fax: 630-859-7060

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