End gun booster
Installation and operating instructions
GRUNDFOS INSTRUCTIONS
2
English (US) Installation and operating instructions
CONTENTS
1. Limited warranty
2. Installation - mechanical
2.1 Pump identification
2.2 Receiving
2.3 Temporary storage
2.4 Location
2.5 Vertical mounting instructions
2.6 Mechanical seals
3. Installation-electrical
3.1 Motors general
3.2 Installation wiring
4. Operation
4.1 Priming
4.2 Pre-start checklist
4.3 Motor rotation
4.4 Starting the pump
4.5 Voltage regulation
4.6 Pump shutdown
4.7 Short duration shutdown
4.8 Extended period shutdown
5. Maintenance
5.1 Motor lubrication
5.2 Cross section and parts list for EB 20503-2
5.3 Cross section and parts list for EB 20501-5
5.4 Disassembly of pumps
5.4.1 Disassembly of liquid end
5.5 Reassembly of pumps
5.6 Ordering parts
5.7 Parts kit
Warnin g
Prior to installation, read these installation and
operating instructions. Installation and operation
must comply with local regulations and accepted
codes of good practice.
Warnin g
The use of this product requires experience with
and knowledge of the product. Persons with
reduced physical, sensory or mental
capabilities must not use this product, unless
they are under supervision or have been
instructed in the use of the product by a person
responsible for their safety. Children must not
use or play with this product.
Page
1. Limited warranty
Products manufactured by GRUNDFOS PUMPS CORPORATION
(Grundfos) are warranted to the original user only to be free of
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defects in material and workmanship for a period of 24 months
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from date of installation, but not more than 30 months from date
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of manufacture. Grundfos' liability under this warranty shall be
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limited to repairing or replacing at Grundfos' option, without
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charge, F.O.B. Grundfos' factory or authorized service station,
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any product of Grundfos' manufacture. Grundfos will not be liable
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for any costs of removal, installation, transportation, or any other
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charges which may arise in connection with a warranty claim.
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Products which are sold but not manufactured by Grundfos are
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subject to the warranty provided by the manufacturer of said
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products and not by Grundfos' warranty. Grundfos will not be
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liable for damage or wear to products caused by abnormal
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operating conditions, accident, abuse, misuse, unauthorized
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alteration or repair, or if the product was not installed in
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accordance with Grundfos' printed installation and operating
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instructions. To obtain service under this warranty, the defective
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product must be returned to the distributor or dealer of Grundfos'
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products from which it was purchased together with proof of
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purchase and installation date, failure date, and supporting
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installation data. Unless otherwise provided, the distributor or
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dealer will contact Grundfos or an authorized service station for
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instructions. Any defective product to be returned to Grundfos or
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a service station must be sent freight prepaid; documentation
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supporting the warranty claim and/or a Return Material
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Authorization must be included if so instructed. GRUNDFOS
WILL NOT BE LIABLE FOR ANY INCIDENTAL OR
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CONSEQUENTIAL DAMAGES, LOSSES, OR EXPENSES
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ARISING FROM INSTALLATION, USE, OR ANY OTHER
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CAUSES. THERE ARE NO EXPRESS OR IMPLIED
WARRANTIES, INCLUDING MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE, WHICH EXTEND BEYOND
THOSE WARRANTIES DESCRIBED OR REFERRED TO
ABOVE. Some jurisdictions do not allow the exclusion or
limitation of incidental or consequential damages and some
jurisdictions do not allow limit actions on how long implied
warranties may last. Therefore, the above limitations or
exclusions may not apply to you. This warranty gives you specific
legal rights and you may also have other rights which vary from
jurisdiction to jurisdiction.
English (US)
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English (US)
2. Installation - mechanical
All installations should be performed by personnel experienced
with the placement, connection, and alignment of pumping
equipment. The following instructions are general in nature, and
may not deal with the specifics of your installation. Read these
instructions thoroughly before installing and operating your
Grundfos type EB centrifugal pump. Keep these instructions
handy for future use.
2.1 Pump identification
All Grundfos Pumps are identified by Catalog and Serial
Numbers. These are stamped on the pump nameplate Fig. 1
affixed to each pump casing and should be referred to in all
correspondence with the Company.
Fig. 1 Nameplate
2.2 Receiving
Check pumping unit for shortages and damages immediately
upon arrival. Pump accessories, when required, are packaged in
a separate container and shipped with the unit. If equipment is
damaged in transit, immediately report the damage to the truck
line’s agent. Make a complete report on the freight bill to speed
satisfactory adjustment by the carrier. Unload and handle the
equipment with a sling or tow motor.
2.3 Temporary stora ge
If pump is not to be installed and operated soon after arrival, store
it in a clean, dry area of moderate ambient temperature. Rotate
the shaft by hand periodically to coat bearing with lubricant to
retard oxidation and corrosion. Follow motor manufacturer’s
storage recommendations where applicable.
2.4 Location
Locate the pump as close to the suction supply as possible. Use
the shortest and most direct suction piping practical. Locate the
pump below system level wherever possible. This will facilitate
priming, assure a steady liquid flow, and provide a positive
suction head. Make sure sufficient NPSH (Net Positive Suction
Head) is provided at the suction end by considering the pump’s
location in relation to the entire system. Available NPSH must
always equal or exceed required NPSH specified on the pump
performance curve. Always allow sufficient accessibility for
maintenance and inspection. Provide a clear space with ample
head room for use of a hoist strong enough to lift the unit. Make
sure a suitable power source is available for the pump motor.
Electrical characteristics should match those specified on the
motor data plate, within the limits covered in Sections 3 and 4.
Avoid pump exposure to sub-zero temperatures to prevent pump
liquid from freezing. If freezing conditions exist during shutdown
periods, see Sections 4.5 and 4.6 for specific recommendations.
2.5 Vertical mounting instructions
The Endgun booster is designed to be mounted vertically on a
2 ½ ” NPT nipple. It may also be mounted with a nipple and
companion flange on both the pump and t he pivot. The majority of
installations are threaded straight onto the nipple where the
suction must be the same size (no decrease in pipe size at
suction allowed). Discharge pipe size will be the same at the
pump or may be one or two sizes larger depending on the length.
Our pump unit is equipped of a wash down duty motor and may
be used in a variety of outdoor applications.
2.6 Mechanical seals
All Grundfos Type EB pumps that are equipped with mechanical
seals are matched to the conditions for which the pump was sold .
Observe the following precautions to avoid seal damage and
obtain maximum seal life. Do not exceed temperature or pressure
limitations for the mechanical seal used. Do not run the pump dry
or against a closed valve! Dry operation will cause seal failure
within minutes. Purge all air from the seal chambers and
recirculation lines prior to operating the pump. Clean and purge
suction piping in new installations before installing and operating
pump. Pipe scale, welding slag and other abrasives can cause
rapid seal failure.
TM 05 5591 3712
3. Installation-electrical
3.1 Motors general
The motor control circuit must have the following components in
order to comply with the National Electrical Code.
• Motor Disconnecting Device: A motor disconnecting device
must be installed that is capable of disconnecting both the
controller (motor starter) and the motor from their source of
power.
• The disconnecting device must be located so that the
controller (motor starter) can be seen from the disconnecting
means. In all cases, the distance from the disconnecting
device to the controller must be less than 50'.
• In most installations the disconnecting device will be a circuit
breaker or fusible disconnect switch.
• Motor short circuit and ground fault protection: Short circuit
and ground fault protection are usually provided by mean s of a
circuit breaker or fusible disconnect switch. The selection of
the size of the circuit breaker or fuse must be in accordance
with Section 430-52 and Table 430-152 of the National
Electrical Code.
• Motor controller with running over current protection (magnet ic
starter): These components must be installed in accordance
with applicable local and state electrical codes in addition to
the National Electrical Code.
Warnin g
Whenever powered equipment is being used in
explosive surroundings, the rules and
regulations generally or specifically imposed by
the relevant responsible authorities or trade
organizations must be observed.
3.2 Installation wiring
Mount the control panel or motor starter(s) in close proximity to
the pump to provide convenient control and ease of installation.
Wire panel or starter(s) to motor(s) and pilot device(s): Wires to
each motor must be sized for at least 125% of the motor
nameplate full load amps. AWG #16 Type THW stranded wire is
recommended for wiring of pilot devices (float switches). Check
incoming power source to ensure that it is the same as the
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voltage and phase of the motors. Verify that the starters are
Caution
suitable to operate the pump motors on voltage and phase that is
available.
4. Operation
4.1 Priming
The Grundfos Type EB pump is not self-priming, and must be
completely primed (filled with liquid) before starting. If the pump
will operate with a positive suction head, prime by opening the
suction valve and allowing liquid to enter the pump casing. Open
the air vent at this time and make sure all air is forced from the
pump by liquid before closing. If the pump ha s suct ion lif t, priming
must be accomplished by other methods. The use of foot valves,
ejectors or vacuum pumps, or by manual filling of the pump
casing and suction line with liquid are possible methods
suggested for this purpose.
Never run the pump dry in the hope that it will
prime itself! Serious damage to the shaft seals,
pump wear rings and shaft sleeves will result.
4.2 Pre-start checklist
Warnin g
In the interest of operator safety, the unit must
not be operated above the nameplate conditions.
Such operation could result in unit failure
causing injury to operating personnel. Consult
instruction book for proper operation and
maintenance of the pump and its supporting
components.
Make the following inspections before starting your Grundfos EB
pump:
1. Make sure all wiring connections to the motor (and starting
device) match the wiring diagram and produce clockwise
rotation as viewed from the back of the motor.
2. Double check rotation. Rotation must be clockwise. Operating
in reverse will destroy the impeller and shaft.
3. If the motor has been in storage for an extended length of
time, either before or after installation, refer to motor
instructions before starting.
4. Check the voltage, phase, and line circuit frequency with the
motor nameplate.
5. Tighten plugs in gauge and drain taps. If the pump is fitted
with pressure gauges, keep gauge clocks closed when not in
use.
6. Check suction and discharge piping for leaks, and make sure
all flange bolts are securely tightened.
4.3 Motor rotation
After the unit has been wired and checked to insure that all
components in the system (disconnect device, magnetic starters,
pilot devices and motors) are properly connected, check motor
rotation as follows: For 3 phase units only—momentarily energize
the motors to ensure that the rotation is correct as indicated by
the arrow cast into the pump volute. If rotation is incorrect,
interchange two wires at the motor starter terminals T1 and T2.
IMPORTANT: The pumps must not be operated while dry. Use
extreme caution that motors are energized only momentarily to
determine proper rotation.
4.4 Starting the pump
1. Fully open gate valve (if any) in suction line, and close gate
valve in discharge line.
2. Fill suction line with liquid and completely prime pump.
3. Start the motor (pump).
4. Immediately make a visual check of pump and suction piping
for pressure leaks.
5. Immediately after pump reaches full operating speed, slowly
open the discharge gate valve until complete system flow is
achieved.
6. Check discharge piping for pressure leaks.
7. If pump is fitted with pressure gauges, open gauge cocks and
record pressure reading for future reference. Verify that the
pump is performing in accordance with parameters specified
on performance curve.
8. Check and record voltage, amperage per phase, and
kilowatts, if a wattmeter is available.
4.5 Voltage regulation
The motor will operate satisfactorily under the following
conditions for voltage and frequency variation, but not necessarily
in accordance with the standards established for operation under
rated conditions: The voltage variation may not exceed 10%
above or below rating specified on the motor data plate. The
frequency variation may not exceed 5% above or below motor
rating. The sum of the voltage and frequency variations may not
exceed 10% above or below motor rating, provided the frequency
variation does not exceed 5%.
4.6 Pump shutdown
The following shutdown procedures will apply in most normal
shutdowns for the Grundfos Type EB pumps. If the pump will be
inoperative for an extended length of time, follow storage
procedures in Extended Period Shutdown. Always close the
discharge valve before stopping the pump. Close the valve slowly
to prevent hydraulic shock. Cut and lock off power to the motor.
4.7 Short duration shutdown
For overnight or temporary shutdown periods under non-freezing
conditions, the pump may remain filled with liquid. Make sure the
pump is fully primed before restarting.
For short or frequent shutdown periods under fre ezing condit ions,
keep fluid moving within the pump casing and insulate or heat the
pump exterior to prevent freezing.
4.8 Extended period shutdown
For long shutdown periods, or to isolate the pump for
maintenance, close suction gate va lve. If no suction valve is used
and the pump has positive suction head, drain all liquid from
suction line to terminate liquid flow into pump suction nozzle.
Remove plugs in pump drain and vent taps, as required, and
drain all liquid from the pump volute casing. If freezing conditions
will exist during long shutdown periods, completely drain the
pump and blow out all liquid passages and pockets with
compressed air. Freezing of pump liquid can also be prevented
by filling the pump with antifreeze solution.
5. Maintenance
Before attempting any inspection or repair on the pump, the driver
controls must be in the "OFF" position, locked and tagged to
prevent injury to personnel performing service on the pump.
5.1 Motor lubrication
To lubricate the motor while running or at rest, remove grease
drain plug (if any) and filler plug on grease fitting. Grease with
clean lubricant until grease appears at drain hole or along motor
shaft.
One-half to one cubic inch of grease is sufficient for motors 5 HP
and under, with proportionately more grease for greater HP
motors.
English (US)
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English (US)
Always follow motor manufacturer’s lubrication instructions if
available, and periodically check grease fittings and drain plugs
for leaks.
If lubricating instructions do not accompany the motor, refer to the
following table for recommended lubrication periods.
Motor Lubrication
Motor RPM Motor HP Operating conditions
3500 All hp
Standard Sever Extreme
6 mo 3 mo 3 mo
Standard conditions:
8 Hours per day operation, normal or light loading, clean air,
100ºF, maximum ambient temperature.
Severe conditions:
Continuous 24-hour operation, shock loading or vibration, poor
ventilation, 100-150ºF, ambient temperature.
Extreme conditions:
Continuous operation, heavy shock or vibration, dirt or dust in
air, extreme ambient temperature.
5.3 Cross section and parts list for EB 20501-5
The following table lists the recommended types of grease for
motor lubrication. These types have all been thoroughly tested
and should be used whenever possible.
Manufacturer
Lubricant
Shell Dolium R
Exxon Polyrex
Chevron
SRi grease NLGI 2
Blackpearl - NLGI 2
Phillips Polytac
Texaco Polystar RB
5.2 Cross section and parts list for EB 20503-2
Position
Number
Part Name
Position
Number
Part Name
1 Casing 8 Pipe. Plug
2 Impeller 9 Wear Ring
3 Shaft Sleeve 10 Adapter
4 Cap Screw Impeller 11 Tubing
5 Key, Impeller 12 Push Type Fitting
6 Washer, Impeller 13 Seal Assy
7 Gasket, Casing 14 Bracket
TM05 5593 3712
Position
Number
Part Name
Position
Number
1 Casing 6 Seal Assy
2 Impeller 7 Gasket casing
3 Bracket 8 Wear ring
4 Pipe Plug 9 Push Type Fitting
5 Tubing
6
TM05 5595 3712
Part Name
5.4 Disassembly of pumps
Caution
Warnin g
Depending on the product being pumped, the
pump should be washed down before any work is
done on it.
Warnin g
Observe extreme caution when venting and/or
draining hazardous liquids. Wear protective
clothing in the presence of caustic, corrosive,
volatile, flammable, or hot liquids. DO NOT
breathe toxic vapors. DO NOT allow sparking,
flames, or hot surfaces in vicinity of the
equipment.
Complete disassembly instructions are outlined below. Proceed
only as far as required to perform the maintenance work needed.
1. Turn of power.
2. Drain System. Flush, if necessary.
3. Remove motor hold down bolts.
5.4.1 Disassembly of liquid end
1. Remove casing bolts that attaches the volute to the bracket.
Set volute aside.
Do not insert screwdriver between impeller vanes
to prevent rotation. It may be necessary to use a
strap wrench around the impeller or shaft to
prevent rotation.
5.6 Ordering parts
Grundfos Pumps has over 90 years of experience in the design,
manufacture, and application of centrifugal pumps and pumping
systems. Grundfos's commitment to state-of-the-art pump design
and quality manufacturing assures maximum user benefits with
optimum equipment life at lower cost. Grundfos’s commitment to
their customers continues through an extensive service
organization. Highly trained technicians can assist customers
with initial startup, troubleshooting, repair, and system analysis.
To ensure that the proper replacement parts are ordered for your
particular pump model, see the Parts kit section 5.7.
5.7 Parts kit
Pump Model Seal Kit Impeller/Wear ring Kit
EB 20503-2 91909684 98351890
EB 20501-5 91910839 98351903
English (US)
For EB 20503-2:
1. Inspect impeller for anti-reversing set screws.
2.Impeller and set screws will need to be evenly heated to
approximately 350 ºF to loosen locktite.
3. To hold rotating element steady, remove the drip canopy and
fan cover exposing the opposite end of the shaft.
4. Use the proper hand tool required to hold the shaft steady for
impeller removal.
5. Once proper heat has been applied and the shaft can be held
secure, remove impeller.
6. Remove capscrews that fasten the bracket to the motor.
7. Place bracket on flat surface and press out seal seat.
For EB 20501-5:
1. Loosen and remove the impeller capscrew along with impeller
washer.
2. Use approximate size gear puller aligned behind impeller
vanes to remove impeller from shaft.
3. Remove impeller key.
4. Remove capscrews that fasten the bracket to the motor.
5. Place bracket on flat surface and press out seal seat.
6. If shaft sleeves requires replacement, it must be evenly
heated to approximately 350 ºF to loosen locktite.
7. Twist sleeve off shaft.
5.5 Reassembly of pumps
1. All parts should be cleaned before reassembly.
2. Refer to parts list to identify required replacement items
Specify pump serial or catalog number when ordering parts.
3. Reassembly is the reverse of disassembly.
4. Observe the following when reassembling the liquid end:
– All mechanical seal components must be in good condition
or leakage may result. Replacement of complete seal
assembly is recommended.
– New shaft sleeves are installed by bonding to shaft with
hydraulic setting locktite.
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U.S.A.
Grundfos CBS, Inc.
902 Koomey Road
Brookshire, TX 77423 USA
Phone: 281-994-2700
Toll Free: 1-800-955-5847
Fax: 1-800-945-4777
Grundfos companies
Being responsible is our foundation
Thinking ahead makes it possible
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