Installation, Operation,
and Maintenance Manual
Series A-C 1500
Table of Contents
Introduction and Safety..................................................................................................................3
Introduction..................................................................................................................................3
Safety.............................................................................................................................................3
Safety terminology and symbols........................................................................................... 3
Safety instruction decals......................................................................................................... 4
User safety................................................................................................................................ 5
Environmental safety...............................................................................................................6
Product warranty......................................................................................................................... 7
Transportation and Storage.......................................................................................................... 8
Inspect the delivery.....................................................................................................................8
Inspect the package................................................................................................................8
Inspect the unit........................................................................................................................ 8
Pump lifting.................................................................................................................................. 8
Long-term storage.......................................................................................................................9
Table of Contents
Product Description......................................................................................................................10
General description.................................................................................................................. 10
Operational specifications....................................................................................................... 10
Installation......................................................................................................................................12
Preinstallation............................................................................................................................ 12
Pump location guidelines.....................................................................................................12
Piping checklist......................................................................................................................13
Typical installation.....................................................................................................................14
Commissioning, Startup, Operation, and Shutdown...............................................................15
Preparation for startup............................................................................................................. 15
Check the rotation.................................................................................................................15
Prime the pump.........................................................................................................................16
Start the pump...........................................................................................................................16
Pump operation precautions...................................................................................................17
Shut down the pump................................................................................................................ 17
Note on the packed pump operation.....................................................................................17
Maintenance..................................................................................................................................19
Lubrication................................................................................................................................. 19
Disassembly............................................................................................................................... 19
Disassembly precautions......................................................................................................19
Drain the pump......................................................................................................................19
Remove the pump assembly............................................................................................... 19
Remove the impeller.............................................................................................................20
Remove the mechanical seal (AC-1500 and AC-1500-F).................................................20
Remove the seal or packing rings (AC-1500-S, AC-1500-D, and AC-1500-PF)............ 20
Remove the 2-inch single mechanical seal (AC-1500-S)..................................................20
Pre-assembly inspections.........................................................................................................20
Replacement guidelines.......................................................................................................21
Shaft and sleeve inspection................................................................................................. 21
Reassembly................................................................................................................................ 21
Assemble the standard mechanical seal (AC-1500 and AC-1500-F)............................. 21
Series A-C 1500 Installation, Operation, and Maintenance Manual 1
Table of Contents
Assemble the single mechanical seal (AC-1500-S)...........................................................22
Assemble the 2-inch single mechanical seal (AC-1500-S)...............................................23
Assemble the double mechanical seal (AC-1500-D)........................................................24
Assemble the packed stuffing box (AC-1500-PF)............................................................. 25
Install the impeller.................................................................................................................26
Reinstall the pump assembly............................................................................................... 26
Screw torque values..............................................................................................................26
Dealer servicing ....................................................................................................................26
2 Series A-C 1500 Installation, Operation, and Maintenance Manual
Introduction and Safety
Introduction
Purpose of this manual
The purpose of this manual is to provide necessary information for:
• Installation
• Operation
• Maintenance
CAUTION:
Read this manual carefully before installing and using the product. Improper use of the
product can cause personal injury and damage to property, and may void the warranty.
NOTICE:
Save this manual for future reference, and keep it readily available at the location of the
unit.
Introduction and Safety
Requesting other information
Special versions can be supplied with supplementary instruction leaflets. See the sales
contract for any modifications or special version characteristics. For instructions,
situations, or events that are not considered in this manual or in the sales documents,
please contact the nearest Xylem representative.
Always specify the exact product type and identification code when requesting technical
information or spare parts.
Safety
WARNING:
• The operator must be aware of safety precautions to prevent physical injury.
• Any pressure-containing device can explode, rupture, or discharge its contents if it is
over-pressurized. Take all necessary measures to avoid over-pressurization.
• Operating, installing, or maintaining the unit in any way that is not covered in this
manual could cause death, serious personal injury, or damage to the equipment. This
includes any modification to the equipment or use of parts not provided by Xylem. If
there is a question regarding the intended use of the equipment, please contact a
Xylem representative before proceeding.
• Do not change the service application without the approval of an authorized Xylem
representative.
CAUTION:
You must observe the instructions contained in this manual. Failure to do so could result
in physical injury, damage, or delays.
Safety terminology and symbols
About safety messages
It is extremely important that you read, understand, and follow the safety messages and
regulations carefully before handling the product. They are published to help prevent
these hazards:
Series A-C 1500 Installation, Operation, and Maintenance Manual 3
Introduction and Safety
Hazard levels
• Personal accidents and health problems
• Damage to the product
• Product malfunction
Hazard level Indication
DANGER:
A hazardous situation which, if not avoided, will result in
death or serious injury
Hazard categories
WARNING:
CAUTION:
NOTICE:
Hazard categories can either fall under hazard levels or let specific symbols replace the
ordinary hazard level symbols.
Electrical hazards are indicated by the following specific symbol:
Electrical Hazard:
These are examples of other categories that can occur. They fall under the ordinary
hazard levels and may use complementing symbols:
• Crush hazard
• Cutting hazard
• Arc flash hazard
A hazardous situation which, if not avoided, could result
in death or serious injury
A hazardous situation which, if not avoided, could result
in minor or moderate injury
• A potential situation which, if not avoided, could
result in undesirable conditions
• A practice not related to personal injury
Safety instruction decals
WARNING:
The maximum working pressure of the pump is listed on the nameplate. Do not exceed
this pressure. Failure to follow these instructions can result in serious personal injury,
death, and/or property damage.
Alert symbol
This safety alert symbol is used in manuals and on the safety instruction decals on the pump
to draw attention to safety-related instructions.
When used, the safety alert symbol means that failure to follow the instructions may result in
a safety hazard.
4 Series A-C 1500 Installation, Operation, and Maintenance Manual
Decals
P70643
P70644
P70642
Introduction and Safety
Make sure your pump has these safety instruction decals and that they are located as this
figure shows. If the decals are missing or illegible, contact your local sales and service
representative for a replacement.
Make sure that all safety instruction decals are always clearly visible and readable.
User safety
General safety rules
These safety rules apply:
• Always keep the work area clean.
• Pay attention to the risks presented by gas and vapors in the work area.
• Avoid all electrical dangers. Pay attention to the risks of electric shock or arc flash
hazards.
• Always bear in mind the risk of drowning, electrical accidents, and burn injuries.
Safety equipment
Use safety equipment according to the company regulations. Use this safety equipment
within the work area:
• Hard hat
• Safety goggles, preferably with side shields
• Protective shoes
• Protective gloves
• Gas mask
• Hearing protection
Series A-C 1500 Installation, Operation, and Maintenance Manual 5
Introduction and Safety
• First-aid kit
• Safety devices
Electrical connections
Electrical connections must be made by certified electricians in compliance with all
international, national, state, and local regulations. For more information about
requirements, see sections dealing specifically with electrical connections.
Precautions before work
Observe these safety precautions before you work with the product or are in connection
with the product:
• Provide a suitable barrier around the work area, for example, a guard rail.
• Make sure that all safety guards are in place and secure.
• Make sure that you have a clear path of retreat.
• Make sure that the product cannot roll or fall over and injure people or damage
• Make sure that the lifting equipment is in good condition.
• Use a lifting harness, a safety line, and a breathing device as required.
• Allow all system and pump components to cool before you handle them.
• Make sure that the product has been thoroughly cleaned.
• Disconnect and lock out power before you service the pump.
• Check the explosion risk before you weld or use electric hand tools.
NOTICE:
Never operate a unit unless safety devices are installed. Also see specific information
about safety devices in other chapters of this manual.
property.
Wash the skin and eyes
Follow these procedures for chemicals or hazardous fluids that have come into
contact with your eyes or your skin:
Condition Action
Chemicals or hazardous fluids in
eyes
Chemicals or hazardous fluids on
skin
Environmental safety
The work area
Always keep the station clean.
Waste and emissions regulations
Observe these safety regulations regarding waste and emissions:
• Appropriately dispose of all waste.
• Handle and dispose of the processed liquid in compliance with applicable
environmental regulations.
• Clean up all spills in accordance with safety and environmental procedures.
• Report all environmental emissions to the appropriate authorities.
1. Hold your eyelids apart forcibly with your fingers.
2. Rinse the eyes with eyewash or running water for at least 15 minutes.
3. Seek medical attention.
1. Remove contaminated clothing.
2. Wash the skin with soap and water for at least 1 minute.
3. Seek medical attention, if necessary.
WARNING:
Radiation Hazard. Do NOT send the product to Xylem if it has been exposed to any
nuclear radiation.
6 Series A-C 1500 Installation, Operation, and Maintenance Manual
Electrical installation
For electrical installation recycling requirements, consult your local electric utility.
Recycling guidelines
Always follow local laws and regulations regarding recycling.
Product warranty
Coverage
Xylem undertakes to remedy defects in products from Xylem under these conditions:
• The faults are due to defects in design, materials, or workmanship.
• The faults are reported to a local sales and service representative within the warranty
period.
• The product is used only under the conditions that are described in this manual.
• The monitoring equipment that is incorporated in the product is correctly connected
and in use.
• All service and repair work that is done by Xylem authorized personnel.
• Genuine Xylem parts are used.
• Only Ex-approved spare parts and accessories that are authorized by an Ex-approved
Xylem representative are used in Ex-approved products.
Limitations
The warranty does not cover defects that are caused by these situations:
Deficient maintenance
•
• Improper installation
• Modifications or changes to the product and installation that are made without
consulting a Xylem authorized representative
• Incorrectly executed repair work
• Normal wear and tear
Xylem assumes no liability for these situations:
• Bodily injuries
• Material damages
• Economic losses
Introduction and Safety
Warranty claim
Xylem products are high-quality products with expected reliable operation and long life.
However, should the need for a warranty claim arise, contact your local sales and service
representative.
Series A-C 1500 Installation, Operation, and Maintenance Manual 7
Transportation and Storage
Transportation and Storage
Inspect the delivery
Inspect the package
1. Inspect the package for damaged or missing items upon delivery.
2. Note any damaged or missing items on the receipt and freight bill.
3. File a claim with the shipping company if anything is out of order.
If the product has been picked up at a distributor, make a claim directly to the
distributor.
Inspect the unit
1. Remove packing materials from the product.
Dispose of all packing materials in accordance with local regulations.
2. Inspect the product to determine if any parts have been damaged or are missing.
3. If applicable, unfasten the product by removing any screws, bolts, or straps.
For your personal safety, be careful when you handle nails and straps.
4. Contact the local sales representative if there is any issue.
Pump lifting
WARNING:
• Assembled units and their components are heavy. Failure to properly lift and support
this equipment can result in serious physical injury and/or equipment damage. Lift
equipment only at the specifically identified lifting points. Lifting devices such as
eyebolts, slings, and spreaders must be rated, selected, and used for the entire load
being lifted.
• Crush hazard. The unit and the components can be heavy. Use proper lifting methods
and wear steel-toed shoes at all times.
In order to lift the entire pump, use slings placed around the unit as shown.
8 Series A-C 1500 Installation, Operation, and Maintenance Manual
Transportation and Storage
Figure 1: Proper lifting method
Long-term storage
If the unit is stored for more than 6 months, these requirements apply:
• Store in a covered and dry location.
• Store the unit free from heat, dirt, and vibrations.
• Rotate the shaft by hand several times at least every three months.
Treat bearing and machined surfaces so that they are well preserved. Refer to the drive
unit and coupling manufacturers for their long-term storage procedures.
For questions about possible long-term storage treatment services, please contact your
local sales and service representative.
Series A-C 1500 Installation, Operation, and Maintenance Manual 9
Product Description
Product Description
General description
The pump is a centrifugal, close-coupled pump. These features make the pump easy to
install, operate, and service:
• High efficiency
• Rugged bronze-fitted construction
• Horizontal or vertical in-line mounting
Intended applications
WARNING:
California Proposition 65 warning! This product contains chemicals known to the state of
California to cause cancer and birth defects or other reproductive harm.
NOTICE:
This product is not intended for potable water applications.
The pump is intended for use with these pumped fluids:
• Unheated domestic and fresh water
• Boiler feed water
• Condensate
• Hydronic cooling or heating
• Benign liquids
• Pressure boosting
• General liquid transfer
Rotation
Pump rotation is clockwise when viewed from the back of the motor. An arrow is also
located on the pump to show the direction of rotation.
Operational
Mechanical seal specifications
specifications
This table describes the specifications of each mechanical seal type.
Seal type Parameter Value
Standard seals, BUNA
Standard seals, EPT
Optional seals, EPR carbon/tungsten
carbide
Flushed single seals
Flushed double seals
5
5
1,3,4
1,3,4
pH range limits for BUNA pH 7–9
Liquid temperature range that
complies with the pH range limits for
BUNA
pH range limits for EPT pH 7–11
Liquid temperature range that
complies with the pH range limits for
EPT
pH range limits pH 7–9
Liquid temperature range 0˚F to 250˚F (-18˚C to 121˚C)
pH range limits pH 7–9
Liquid temperature range 0˚F to 250˚F (-18˚C to 121˚C)
-20˚F to 225˚F (-29˚C to 107˚C)
-20˚F to 250˚F (-29˚C to 121˚C)
10 Series A-C 1500 Installation, Operation, and Maintenance Manual
Product Description
Seal type Parameter Value
2
Packing
pH range pH 7–9
Liquid temperature range 0˚F to 200˚F (-18˚C to 93˚C)
Table notes
1. An external flush is required on low pressure systems that contain a high
concentration of abrasives.
2. Use packing on open or closed systems which require a large amount of makeup
water, as well as systems that are subjected to a wide variety of chemical conditions
and solids buildup.
3. For operating temperatures above 250°F, a cooled flush is required and is
recommended for temperatures above 225°F for optimum seal life. On closed
systems, cooling is accomplished by inserting a small heat exchanger in the flush line
to cool the seal flushing fluid.
4. Flush-line filters and sediment separators are available on request.
5. Use a standard seal on closed or open systems that are relatively free of dirt and/or
other abrasive particles.
Series A-C 1500 Installation, Operation, and Maintenance Manual 11
Installation
Installation
Preinstallation
Precautions
WARNING:
• When installing in a potentially explosive environment, make sure that the motor is
properly certified.
• You must earth (ground) all electrical equipment. This applies to the pump
equipment, the driver, and any monitoring equipment. Test the earth (ground) lead to
verify that it is connected correctly.
• Motors without built-in protection must be provided with contactors and thermal
overload protection for single-phase motors, or starters with heaters for three-phase
motors. (See the nameplate on the drive unit to select properly-sized overloads.)
NOTICE:
Supervision by an authorized Xylem representative is recommended to ensure proper
installation. Failure to do so may result in equipment damage or decreased performance.
Evaluate the installation in order to determine 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.
Pump location guidelines
WARNING:
Assembled units and their components are heavy. Failure to properly lift and support this
equipment can result in serious physical injury and/or equipment damage. Lift equipment
only at the specifically identified lifting points. Lifting devices such as eyebolts, slings, and
spreaders must be rated, selected, and used for the entire load being lifted.
Guideline Explanation/comment
Keep the pump as close to the liquid source as practically
possible.
If the pump is not on a closed system, locate the pump so
that the fewest number of bends or elbows in the suction
pipe are needed.
Make sure that the space around the pump is sufficient. This facilitates ventilation, inspection, maintenance,
If you require lifting equipment such as a hoist or tackle,
make sure that there is enough space above the pump.
Protect the unit from weather and water damage due to
rain, flooding, and freezing temperatures.
This minimizes the friction loss and keeps the suction
piping as short as possible.
and service.
This makes it easier to properly use the lifting
equipment and safely remove and relocate the
components to a safe location.
This is applicable if nothing else is specified.
12 Series A-C 1500 Installation, Operation, and Maintenance Manual
Piping checklist
Installation
Guideline Explanation/comment
Do not install and operate the equipment in closed
systems unless the system is constructed with properlysized safety devices and control devices.
Take into consideration the occurrence of unwanted noise
and vibration.
If the pump location is overhead, undertake special
precautions to reduce possible noise transmission.
WARNING:
• The heating of water and other fluids causes volumetric expansion. The associated
forces can cause the failure of system components and the release of hightemperature fluids. In order to prevent this, install properly sized and located
compression tanks and pressure-relief valves. Failure to follow these instructions can
result in serious personal injury or death, or property damage.
• Avoid serious personal injury and property damage. Make sure that the flange bolts
are adequately torqued.
• Never force piping to make a connection with a pump.
Acceptable devices:
• Pressure relief valves
• Compression tanks
• Pressure controls
• Temperature controls
• Flow controls
If the system does not include these devices, consult
the engineer or architect in charge before you operate
the pump.
The best pump location for noise and vibration
absorption is on a concrete floor with subsoil
underneath.
Consider a consultation with a noise specialist.
Check Explanation/comment Checked
Check that a section of straight pipe, with a length that
is five times its diameter, is installed between the
suction side of the pump and the first elbow, or that a
B&G Suction Diffuser is installed.
Check that the suction and discharge pipes are
supported independently by use of pipe hangers near
the pump .
Check that there is a strong, rigid support for the
suction and discharge lines.
For pumps with flanges, check that the bolt holes in
the pump flanges match the bolt holes in the pipe
flanges.
For pumps mounted in vertical piping with the motor
in the horizontal position, check that adequate
support is provided.
Check that the suction or discharge lines are not
forced into position.
Check that fittings for absorbing expansion are
installed in the system when considerable
temperature changes are expected.
This reduces suction turbulence by
straightening the flow of liquid before it enters
the pump.
This eliminates pipe strain on the pump .
As a rule, ordinary wire or band hangers are not
adequate to maintain proper alignment.
—
This prevents strain on the pump parts and
piping. Do not mount the pump with the motor
vertically downward. Do not use motor lift rings
to suspend the pump.
Coupling and bearing wear will result if suction
or discharge lines are forced into position.
The code for Pressure Piping (A.S.A.B. 31.1) lists
many types of supports available for various
applications.
This helps to avoid strain on the pump.
Series A-C 1500 Installation, Operation, and Maintenance Manual 13
1
2
3
4
5
6
7
8
9
10
11
Installation
Check Explanation/comment Checked
Check that you have a foot valve of equal or greater
area than the pump suction piping when you use in
an open system with a suction lift.
Check that flexible piping is used on both the suction
and discharge sides of the pump when you use an
isolation base.
Check that a triple duty valve is installed in the
discharge line.
Check that the pipeline has isolation valves around
the pump and has a drain valve in the suction pipe.
Use PTFE tape sealer or a high quality thread sealant
when you install the suction and discharge
connections to a threaded pump housing.
Typical installation
Prevent clogging by using a strainer at the
suction inlet next to the foot valve. Make sure
that the strainer has an area three times that of
the suction pipe with a mesh hole diameter of
no less than 0.25 in. (0.64 cm).
—
This valve serves as a check valve that protects
the pump from water hammer, and serves as an
isolation valve for servicing and for throttling.
—
—
1. Compression tank (located in the suction piping)
2. Air separator
3. System supply
4. Circuit setter
5. Triple duty valve
6. Pump
7. Suction diffuser
8. Isolation valve
9. Pipe from boiler, chiller, or converter
10. Cold water supply
11. Reducing valve
Check that the control and safety devices have these characteristics:
• Properly sized for their purpose
• Placed correctly in the system before putting the system into operation
14 Series A-C 1500 Installation, Operation, and Maintenance Manual
Commissioning, Startup, Operation, and Shutdown
Commissioning, Startup, Operation,
and Shutdown
Preparation for startup
WARNING:
• Failure to follow these precautions before you start the unit will lead to serious
personal injury and equipment failure.
• Do not operate the pump below the minimum rated flows or with the suction or
discharge valves closed. These conditions can create an explosive hazard due to
vaporization of pumped fluid and can quickly lead to pump failure and physical injury.
• If the pump, motor, or piping operate at extremely high or low temperatures, then
guarding or insulation is required. Failure to follow these instructions can result in
serious personal injury or death, and property damage.
• Always disconnect and lock out power to the driver before you perform any
installation or maintenance tasks. Failure to disconnect and lock out driver power will
result in serious physical injury.
• Operating the pump in reverse rotation can result in the contact of metal parts, heat
generation, and breach of containment.
NOTICE:
You must follow these precautions before you start the pump:
At initial startup, do not adjust the variable-speed drivers or check for speed governor or
over-speed trip settings while the variable-speed driver is coupled to the pump. If the
settings have not been verified, then uncouple the unit and refer to instructions supplied
by the driver manufacturer.
Check the rotation
WARNING:
• Verify the driver settings before you start any pump.
• Make sure that the warm-up rate does not exceed 2.5°F (1.4°C) per minute.
• Flush and clear the system thoroughly to remove dirt or debris in the pipe system in
order to prevent premature failure at initial startup.
• Bring variable-speed drivers to the rated speed as quickly as possible.
• Run a new or rebuilt pump at a speed that provides enough flow to flush and cool the
close-running surfaces of the stuffing-box bushing.
• If temperatures of the pumped fluid will exceed 200°F (93°C), then warm up the pump
prior to operation. Circulate a small amount of fluid through the pump until the casing
temperature is within 100°F (38°C) of the fluid temperature.
• Operating the pump in reverse rotation can result in the contact of metal parts, heat
generation, and breach of containment.
• Always disconnect and lock out power to the driver before you perform any
installation or maintenance tasks. Failure to disconnect and lock out driver power will
result in serious physical injury.
Series A-C 1500 Installation, Operation, and Maintenance Manual 15
Commissioning, Startup, Operation, and Shutdown
1. Unlock power to the driver.
2. Make sure that everyone is clear, and then jog the driver long enough to determine
that the direction of rotation corresponds to the arrow on the pump.
3. Lock out power to the driver.
Prime the pump
CAUTION:
Do not run the pump dry.
Make sure that the pump body is full of liquid before startup. If the system does not
automatically fill the pump body with liquid, then you must manually prime the pump.
1. Loosen the vent plugs on the pump body.
2. While venting the air from the pump body, rotate the pump shaft a few times by hand.
3. After all air has been purged from the pump, close the vent plugs.
Start the pump
CAUTION:
• Observe the pump for vibration levels, bearing temperature, and excessive noise. If
normal levels are exceeded, shut down the pump and resolve the issue.
Before you start the pump, you must perform these tasks:
• Open the suction valve.
• Open any recirculation or cooling lines.
1. Fully close or partially open the discharge valve, depending on system conditions.
2. Start the driver.
3. Slowly open the discharge valve until the pump reaches the desired flow.
4. Immediately check the pressure gauge to ensure that the pump quickly reaches the
correct discharge pressure.
5. If the pump fails to reach the correct pressure, perform these steps:
a) Stop the driver.
b) Prime the pump again.
c) Restart the driver.
6. Monitor the pump while it is operating:
a) Check the pump for bearing temperature, excessive vibration, and noise.
b) If the pump exceeds normal levels, then shut down the pump immediately and
correct the problem.
7. Repeat steps 5 and 6 until the pump runs properly.
16 Series A-C 1500 Installation, Operation, and Maintenance Manual
Pump operation precautions
General considerations
CAUTION:
• Vary the capacity with the regulating valve in the discharge line. Never throttle the
flow from the suction side since this can result in decreased performance, unexpected
heat generation, and equipment damage.
• Do not overload the driver. Driver overload can result in unexpected heat generation
and equipment damage. The driver can overload in these circumstances:
• The specific gravity of the pumped fluid is greater than expected.
• The pumped fluid exceeds the rated flow rate.
• Make sure to operate the pump at or near the rated conditions. Failure to do so can
result in pump damage from cavitation or recirculation.
Operation at reduced capacity
WARNING:
Never operate any pumping system with a blocked suction and discharge. Operation,
even for a brief period under these conditions, can cause confined pumped fluid to
overheat, which results in a violent explosion. You must take all necessary measures to
avoid this condition.
Commissioning, Startup, Operation, and Shutdown
CAUTION:
Avoid excessive vibration levels. Excessive vibration levels can damage the bearings,
stuffing box or seal chamber, and the mechanical seal, which can result in decreased
performance.
NOTICE:
• Avoid increased radial load. Failure to do so can cause stress on the shaft and
bearings.
• Avoid heat build-up. Failure to do so can cause rotating parts to score or seize.
• Avoid cavitation. Failure to do so can cause damage to the internal surfaces of the
pump.
Operation under freezing conditions
NOTICE:
Do not expose an idle pump to freezing conditions. Drain all liquid that is inside the pump
and the flush lines. Failure to do so can cause liquid to freeze and damage the pump.
Shut down the pump
1. Slowly close the discharge valve.
2. Shut down and lock the driver to prevent accidental rotation.
Note on the packed pump operation
Tighten the gland nuts
Before you start the pump, back off the packing gland nuts or screws until the gland is
loose.
Hand tighten until the gland is snug against the
freely run from the packing. This is normal and should be allowed to continue for a period
of time before you continue to tighten the gland. Tighten the gland nuts slowly and one
flat at a time.
Series A-C 1500 Installation, Operation, and Maintenance Manual 17
first packing ring. Initially, water might
Commissioning, Startup, Operation, and Shutdown
Leakage rate
An adequate leakage rate is not one single value for all pumps and installations, but is the
amount required to provide adequate cooling and lubrication. The required leakage is
influenced by operating pressure, fluid temperature, shaft speed, and so forth. For fluid
temperatures in the range of 32°F to 190°F (0°C to 88°C), average leakage rates of 60 to
80 drops per minute are recommended. However, each individual pump and installation
has unique operating conditions that result in widely-variable leakage rate requirements.
Maximum fluid temperature
At fluid operating temperatures near the upper limit of 190°F (88°C), the maximum
temperature rise of the leakage is important. Never operate a packed pump with steam
forming at the gland. This limits the temperature rise to a maximum of about 20°F (-7°C). If
the formation of steam persists at higher leakage rates, you must provide cooling water by
means of an external supply, or a heat exchanger used to cool the bypass flush.
18 Series A-C 1500 Installation, Operation, and Maintenance Manual
Maintenance
Lubrication
The pump motor has been lubricated at the factory. Keep the motor properly lubricated in
accordance with the motor manufacturer's instructions.
Disassembly
Disassembly precautions
This manual clearly identifies accepted methods for disassembling units. These methods
must be adhered to.
WARNING:
• Make sure that the pump is isolated from the system and that pressure is relieved
before you disassemble the pump, remove plugs, open vent or drain valves, or
disconnect the piping.
• Always disconnect and lock out power to the driver before you perform any
installation or maintenance tasks. Failure to disconnect and lock out driver power will
result in serious physical injury.
• Crush hazard. The unit and the components can be heavy. Use proper lifting methods
and wear steel-toed shoes at all times.
Maintenance
Drain the pump
NOTICE:
Make sure that all replacement parts are available before you disassemble the pump for
overhaul.
CAUTION:
• Allow all system and pump components to cool before you handle them to prevent
physical injury.
1. Close the isolation valves on the suction and discharge sides of the pump.
You must drain the system if no valves are installed.
2. Open the drain valve.
Do not proceed until liquid stops coming out of the drain valve. If liquid continues to
flow from the drain valve, the isolation valves are not sealing properly and you must
repair them before you proceed.
3. Leave the drain valve open and remove the drain plug located on the bottom of the
pump housing.
Do not reinstall the plug or close the drain valve until the reassembly is complete.
4. Drain the liquid from the piping and flush the pump if it is necessary.
5. Disconnect all auxiliary piping and tubing.
Remove the pump assembly
1. Loosen the volute capscrews but do not remove them.
2. Use the capscrews in the jackscrew holes in order to loosen the pump assembly from
the volute.
Series A-C 1500 Installation, Operation, and Maintenance Manual 19
Maintenance
3. Remove the seal flushing tube if it is used.
4. Remove the volute capscrews.
5. Remove the pump assembly from the volute.
Remove the impeller
WARNING:
Never apply heat to remove an impeller. The use of heat may cause an explosion due to
trapped liquid, resulting in severe physical injury and property damage.
CAUTION:
Wear heavy work gloves when you handle impellers. The sharp edges can cause physical
injury.
1. Remove the impeller capscrew.
2. Remove the lockwasher and the washer.
3. Remove the impeller.
WARNING:
Pressurized device. Make sure that the internal pressure is relieved
before you continue.
Remove the mechanical seal (AC-1500 and AC-1500-F)
1. Remove the rotating portion of the seal.
If necessary, use a screwdriver to loosen the rubber ring.
2. Remove the seal insert, the insert gasket, and the retainer if it is used.
Remove the seal or packing rings (AC-1500-S, AC-1500-D, and AC-1500-PF)
1. Remove the hex nuts from the seal cap bolts.
2. For the AC-1500-PF, remove the hex nuts that hold the packing gland to the
box.
3. Remove the coverplate screws.
4. Remove the coverplate from the bracket.
5. Remove the seal assembly or packing rings.
Remove the 2-inch single mechanical seal (AC-1500-S)
1. Remove the screws from the seal gland.
2. Remove the coverplate screws.
3. Remove the coverplate from the bracket.
4. Remove the seal assembly.
Pre-assembly inspections
Guidelines
Before you assemble the pump parts, make sure you follow these guidelines:
• Inspect the pump parts according to the information in these pre-assembly topics
before you reassemble your pump. Replace any part that does not meet the required
criteria.
• Make sure that the parts are clean. Clean the pump parts in solvent in order to remove
oil, grease, and dirt.
stuffing
20 Series A-C 1500 Installation, Operation, and Maintenance Manual
NOTICE:
Protect machined surfaces while you clean the parts. Failure to do so may result in
equipment damage.
Replacement guidelines
Impeller replacement
This table shows the criteria for replacing the impeller:
Impeller parts When to replace
Impeller vanes • When grooved deeper than 1/16 in. (1.6 mm), or
Vane edges When you see cracks, pitting, or corrosion damage
Gaskets, O-rings, and seatsreplacement
• Replace all gaskets and O-rings at each overhaul and disassembly.
• Inspect the seats. They must be smooth and free of physical defects.
• Replace parts if the seats are defective.
Shaft and sleeve inspection
Inspection criteria
Inspect the shaft and sleeve according to this criteria:
• Thoroughly clean the shaft and sleeve.
• Thoroughly clean the coverplate seal cavity.
• Inspect the surface for damage such as pitting, corrosion, nicks, and scratches.
Replace these parts if they are damaged.
Maintenance
• When worn evenly more than 1/32 in. (0.8 mm)
Reassembly
Assemble the standard mechanical seal (AC-1500 and AC-1500-F)
1. Lubricate the shaft sleeve and coverplate seal cavity with soapy water.
Do not use a petroleum lubricant.
2. Install a new insert gasket.
3. Install a new seal insert and make sure that the indentation is against the insert gasket.
4. Slide a new rotating seal assembly onto the shaft sleeve.
5. Push the top of the compression ring with a screwdriver until the seal is tight against
the seal insert.
6. Install the seal spring and point the narrow end toward the seal.
Series A-C 1500 Installation, Operation, and Maintenance Manual 21
1
2
3
4
5
6
7
8
9
10
11
12
13
Maintenance
1. Slinger
2. Bracket coverplate
3. Seal assembly
4. Impeller key
5. Volute capscrew
6. Impeller
7. Impeller lockwasher
8. Volute
9. Impeller capscrew
10. Volute gasket
11. Impeller washer
12. Shaft sleeve
13. Shaft
Figure 2: Standard mechanical seal
Assemble the single mechanical seal (AC-1500-S)
1. Lubricate the shaft sleeve and seal cap with soapy water.
Do not use a petroleum lubricant.
2. Insert a stationary seal with an O-ring into the seal cap and slide it onto the shaft.
3. Replace the seal cap gasket.
4. Slide the rotating portion of the seal assembly onto the shaft sleeve and lock it in
place.
ID seal size Distance between collar and impeller end of the shaft sleeve
1-1/4 in. (3.175 cm) 1-13/32 in. (3.571 cm)
1-5/8 in. (4.128 cm) 1-1/4 in. (3.175 cm)
5. Assemble the coverplate onto the bracket.
6. Tighten the capscrews according to the Capscrew torque table.
7. Attach the seal cap to the coverplate.
8. Tighten the hex nuts on the seal cap bolts according to the Capscrew torque table.
22 Series A-C 1500 Installation, Operation, and Maintenance Manual
2
3
4
5
6
7
9
1
8
1. O-ring
2
3
5
6
1
4
2. Coverplate
3. For 1-1/4 in. seal: 1-13/32 in. (3.571 cm)
4. For 1-5/8 in. seal: 1-1/4 in. (3.175 cm)
5. Seal locking collar
6. Seal cap bolt
7. Seal cap
8. O-ring
9. Motor end
Figure 3: Single mechanical seal (AC-1500–S)
Maintenance
Assemble the 2-inch single mechanical seal (AC-1500-S)
1. Lubricate the shaft sleeve with soapy water.
Do not use a petroleum lubricant.
2. Slide the stationary seal with an O-ring onto the shaft.
3. Slide the rotating portion of the seal assembly onto the shaft sleeve and lock it in
place a distance of 55/64 in. (2.813 cm) from the seal collar to the impeller end of the
shaft sleeve.
4. Assemble the coverplate onto the bracket.
5. Tighten the capscrews according to the Capscrew torque table.
6. Attach the seal gland to the coverplate.
7. Tighten the capscrews to the seal gland according to the Capscrew torque table.
Series A-C 1500 Installation, Operation, and Maintenance Manual 23
1
2
1
Maintenance
1. Seal gland
2. Coverplate
3. For 2 in. seal: 55/64 in. (2.813 cm)
4. Seal locking collar
5. O-ring
6. Seal gland capscrew
Figure 4: 2-inch single mechanical seal
Assemble the double mechanical seal (AC-1500-D)
1. Lubricate the shaft sleeve, seal cap, and coverplate cavity with soapy water.
Do not use a petroleum lubricant.
2. Insert a stationary seal and O-ring into the seal cap.
For the 1-1/4 in. ID seal, both parts are housed in the coverplate. A seal cap gasket is
not used.
1. O-rings
2. Motor end
Figure 5: Double mechanical seal
3. Insert another stationary seal and O-ring into the coverplate.
4. Slide the seal cap onto the shaft.
5. Replace the seal cap gasket.
6. Slide the rotating portion of the seal assembly onto the shaft sleeve.
7. Assemble the coverplate onto the bracket.
8. Tighten the capscrews according to the Capscrew torque values table.
9. Attach the seal cap to the coverplate.
10. Tighten the hex nuts on the seal cap bolts according to the Capscrew torque values
table.
24 Series A-C 1500 Installation, Operation, and Maintenance Manual
Assemble the packed stuffing box (AC-1500-PF)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Maintenance
1. Slinger
2. Shaft sleeve
3. Packing gland
4. Flush line
5. Coverplate capscrew
6. Impeller key
7. Volute capscrew
8. Impeller washer
9. Impeller
10. Impeller capscrew
11. Volute
12. Impeller lockwasher
13. Volute gasket
14. Coverplate
15. Drip drain
16. Lantern ring
17. Packing
18. Gland bolt
19. Bracket
20. Shaft
Figure 6: Packed stuffing box
1. Insert two packing rings into the
stuffing box.
2. Insert the lantern ring and the last two pieces of packing.
Make sure that the joints on the packing rings are staggered 90º.
3. Install, but do not tighten, the packing gland.
4. Install the coverplate over the pump shaft.
5. Tighten the capscrews according to the Capscrew torque table in the Maintenance
chapter.
6. Tighten the packing gland to compress the packing.
See the note on the packed pump operation in the Operations chapter for more
information.
Series A-C 1500 Installation, Operation, and Maintenance Manual 25
Maintenance
Install the impeller
1. Install the impeller, impeller washer, lockwasher, and capscrew.
2. Tighten the capscrew according to the Capscrew torque values table.
Reinstall the pump assembly
1. Install a new volute gasket.
2. Install the pump assembly into the volute.
3. Tighten the volute capscrews according to the Capscrew torque table.
4. Install a seal flushing tube if it is used.
5. Install the drain plug and close the drain valve.
6. Open the isolation valves and inspect the pump for leaks.
7. Return the pump to service if it is not leaking.
Screw torque values
Capscrew torque in ft-lb (Nm)
Capscrew
type
SAE grade
2
Brass and
stainless
steel
SAE grade
5
Head
marking
or
Dealer servicing
Capscrew diameter (in inches)
1/4 5/16 3/8 7/16 1/2 5/8 3/4 7/8 1
6 (8) 13 (18) 25 (34) 38 (52) 60 (81) 120 (163) 190 (258) 210 (285) 300 (407)
4 (5) 10 (14) 17 (23) 27 (37) 42 (57) 83 (113) 130 (176) 200 (271) 300 (407)
10 (14) 20 (27) 35 (47) 60 (81) 90 (122) 180 (244) 325 (440) 525 (712) 800 (1085)
If trouble occurs that cannot be rectified, contact your local sales and service
representative and be prepared to provide this information:
1. Complete nameplate data of pump and motor
2. Suction and discharge pipe pressure gauge readings
3. Ampere draw of the motor
4. A sketch of the pump hook-up and piping
26 Series A-C 1500 Installation, Operation, and Maintenance Manual
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www.gouldswatertechnology.com
AC5660_en-US_2013-07_IOM_SeriesA-C1500
Visit our Web site for the latest version of this document
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The original instruction is in English. All non-English
instructions are translations of the original instruction.
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