Stancor AHS Series User manual

Installation,
Operation
and Maintenance
Manual
Stancor™
AHS Series
Pumps

2
Table of Contents
Safety Guidelines 3
Caution 4
Wiring 4
Maintenance 4
Nameplate format 4
Prior to Operation 5
Installation 5
Electrical Wiring 6
Wiring 6
Cable 6
Grounding 6
Wiring Diagrams 6
Operation 7
Maintenance 7
Exploded View 9
List of Parts 10
Troubleshooting 11
Disassembly and Assembly 12
Appendices: 13
Technical Data: 13
Specifications: 13
Notes 14

3
READ THESE INSTRUCTIONS CAREFULLY BEFORE ATTEMPTING TO INSTALL, OPERATE, OR SERVICE YOUR
PRODUCT.
KNOW THE PRODUCT’S APPLICATION, LIMITATIONS, AND POTENTIAL HAZARDS. PROTECT YOUR-SELF AND
OTHERS BY OBSERVING ALL SAFETY INFORMATION. FAILURE TO COMPLY WITH THESE INSTRUCTIONS COULD
RESULT IN PERSONAL INJURY AND/OR PROPERTY DAMAGE!
WARNING: RISK OF ELECTRIC SHOCK.
Safety Guidelines
This instruction manual provides you with the information required to safely own and operate your product.
Retain these instructions for future reference.
The product you have purchased is of the highest quality workmanship and material and has been engineered to give you
long and reliable service.
This product has been carefully tested, inspected, and packaged to ensure safe delivery and operation. Please examine your
item(s) carefully to ensure that no damage occurred during shipment.
If damage has occurred, please contact the place of purchase. They will assist you in replacement or repair, if required.
To reduce the risk of electric shock, be certain that it is connected only to a properly grounded, grounding type
receptacle.
When a pump is in a basin, etc., do not touch motor, pipes or water until unit is unplugged or shut off. If your installation
has water or moisture present, do not touch wet area until all power has been turned off. If shut-off box is not accessible,
call the electric company to shut off service to the location, or call your local fire department for instructions. Failure to follow
this warning can result in fatal electrical shock.
The flexible jacketed cord assembly mounted to the pump must not be modified in any way, except for shortening the cord
to fit into a control panel. Any splice between the pump and the control panel must be made within a junction box and
mounted outside of the basin, and comply with the National Electrical Code. Do not use the power cord for lifting the pump.
The pump motor is equipped with an automatic resetting thermal protector and may restart unexpectedly. Protector
tripping is an indication of motor overloading because of operating the pump at low heads (low discharge restriction),
excessively high or low voltage, inadequate wiring, incorrect motor connections, or a defective motor or pump.
For a submersible well pump:
Reduced risk of electric shock during operation of this pump requires the provision of acceptable grounding:
When the means of connection to the supply-connection box is other than grounded metal conduit, ground the pump
back to the service by connecting a copper conductor, at least the size of the circuit conductors supplying the pump,
to the grounding screw provided within the wiring compartment.
This pump is provided with a means for grounding. To reduce the risk of electric shock from contact with adjacent
metal parts, bond supply box to the pump-motor-grounding means and to all metal parts accessible at the well head,
including metal discharge pipes, metal well casing, and similar parts, by means of:
An equipment-grounding conductor at least the size of the well-cable conductors, or the equivalent, that runs down
the well with the well cable and
A clamp, a weld, or both when required, secured to the equipment-grounding lead, the equipment-grounding terminal, or
the grounding conductor on the pump housing.
The equipment-grounding lead, when one is provided, is the conductor that has an outer surface of insulation that is
green with or without one or more yellow stripes.
For a cord and plug-connected pump:
Risk of electric shock - This pump is supplied with a grounding conductor and grounding-type attachment plug. To
reduce the risk of electric shock, be certain that it is connected only to a proper grounded, grounding type receptacle.
When use as a fountain pump, to reduce the risk of electric shock, use only on portable self-contained fountains no
larger than 5 feet in any dimension. Read all instructions and Safety Guidelines thoroughly. Failure to follow the
guidelines and instructions could result in serious bodily injury and/or property damage.

4
During normal operation, this pump is immersed in water. Also, during rainstorms, water may be present in the surrounding
area of the pump. Caution must be used to prevent bodily injury when working near the pump. Electrical power should be
disconnected prior to touching, servicing, or repairing the pump.
Do not run the pump in a dry basin. If the pump is run in a dry basin, the surface temperature of the pump
will rise to a high level. This high temperature could cause skin burns if the pump is touched and will
cause serious damage to your pump. Do not install in locations classified as hazardous in accordance
with the National Electrical Code, ANSI/NFPA 70. Do not remove cord and strain relief. Do no connect
conduit to pump.
Caution
For best performance of check valves, when handling solids install in a horizontal position or at an angle of no more than
45°. Do not install check valve in a vertical position as solids may settle in valve and prevent opening on start-up. A gate
valve should follow the check valve to allow periodic cleaning of the check valve or removal of the pump. The remainder
of the discharge line should be as short as possible with a minimum of turns to minimize friction head loss. Sewage and
effluent applications will require a separate sump vent. A connection is provided on top of the sump or cover which must
be piped to the existing building vent or extended outside with its own standpipe.
When working on pump or switch, always unplug pump power cord in addition to removing or shutting off circuit
breaker before working on pump.
Wiring
Check local electrical and building codes before installation. The installation must be in accordance with their
regulations as well as the most recent National Electrical Code (NEC).
Pump should be connected or wired to its own circuit with no other outlets or equipment in the circuit line. Fuses and
circuit breaker should be of ample capacity in the electrical circuit.
Maintenance
If the pump does not operate properly or trouble shooting doesn’t work, consult your pump dealer or take pump to a
Stancor authorized service center.
Nameplate format
DO NOT USE TO PUMP FLAMMABLE OR EXPLOSIVE FLUIDS SUCH AS GASOLINE, FUEL OIL, KEROSENE, ETC.
FAILURE TO FOLLOW THIS WARNING CAN RESULT IN PERSONAL INJURY, DEATH AND/OR PROPERTY DAMAGE.

5
Prior to Operation
Check the following points upon receipting of your pump:
Is the pump exactly what you ordered? Check nameplate. It is especially important that you check whether the pump is to
be used with 50 or 60 Hz.
Has any damage occurred during shipment? Are any bolts or nuts loose?
Have all necessary accessories been supplied?
We recommend that you keep a spare pump on hand in case of emergencies. Keep this instruction manual in a place
for future reference.
Check the nameplate for your pump’s head(HEAD), volume(CAPACITY), speed(SPEED), motor voltage and current.
Installation
1. Check the following before beginning installation.
Insulation resistance measurement:
With the motor and cable (excluding the power supply cable) immersed in water, use a Megger to measure the
insulation resistance between ground and each phase of the motor, and again between each phase of the motor. The
Megger should indicate an insulation resistance of not less than 20mega ohms. While making the measurement, keep
the power supply cable off the ground.
We recommend that an auxiliary pump be kept on hand in case of emergency.
2. Installation
For automatic operation, pump must be plugged or wired into a remote float switch or liquid level controller.
Installation instructions are included with all our switches and controllers and should be referred to for installation.
Installation and servicing shall be conducted by qualified person I people. Pump will run continuously if plugged
directly into an electrical outlet. Care should be taken to prevent pump running in a dry sump. Pump must be installed
with local plumbing codes. Pump must be placed on a hard level surface. Never place pump directly on clay, earth,
or gravel surfaces. Pump can be installed with ABS, PVC, polyethylene, or galvanized steel pipe. Proper adapters
are required to connect plastic pipe to pump. Always install a union in the discharge line, just above the sump pit, to
allow for easy removal of the pump for cleaning or repair. A check valve must be used in the discharge line to
prevent backflow of liquid into the basin. The check valve should be a free-flow valve that will easily pass solids.
Under no circumstances should cable be pulled while the pump is being transported or installed.
Attach a chain or rope to the grip and install the pump.
This pump must not be installed on its side or operated a dry condition. Ensure that it is installed upright on a secure
base.
Install the pump at a location in the tank where there is the least turbulence.
If there is a flow of liquid inside the tank, support the piping where appropriate. Install piping so that air will not be
entrapped. If piping must be installed in such a way that air pockets are unavoidable, install an air release valve wherever
such air pockets are most likely to develop.
Do not permit end of discharge piping to be submerged, as backflow will result when the pump is shut down.
Non-automatic pumps (models AHS), have an automatic operating system pump operating water level near the minimum
operating level as the automatic cut-off switch incorporated inside the motor will be activated. To avoid dry operation,
install an automatic operating system, as shown in Fig-1 and maintain a safe operating water level (C.W.L.: Continuous
Water Level).
For automatic pumps (models AHS-A), install the floats as shown in Fig-2. The pump may not start if a floats switch
touches the wall of the water tank or the piping. Install the floats so that this will not happen.

6
Fig-1 Fig-2
Electrical Wiring
Wiring
A) Wire as indicated for the appropriate start system as shown in Fig-3 for single phase version and Fig-4 for
three phases.
B) Loose connections will stop the pump. Make sure all electrical connections secure.
Cable
WARNING: Never let the end of the cable contact water.
C) If the cable is extended, do not immerse the splice in water.
D) Fasten the cable to the handle
E) Install the cable so that it will not overheat. Overheating can be caused by coiling the cable and exposing it to
direct sun- light.
Grounding
As shown in Fig-3 & Fig-4 ground the green wire. Under no circumstances should the green wire be connected to
the power supply directly.
Wiring Diagrams

7
Operation
1. Before starting the pump
1. After completing installation, measure the insulation resistance again as described in Installation.
2. Check water level.
If the pump is operated continuously for an extended period in a dry condition or at the lowest water level,
the motor protector will be shut off the power. Constant operating in above condition will shorten pump
lifetime. Do not start the pump again in such a situation before the motor has completely cooled.
2. Test operation….
(1) Turn the operating switch on and off a couple of times to check switch function.
For the AHS-A
Floating switch must be raised for the pump to start.
(2) Next, check direction of rotation. If discharge volume is low or unusual sounds are heard when the pump is
operating, rotation direction is reversed. When this happens, reverse two of the wires.
Maintenance
Check pressure, output, voltage, current and other specifications. Unusual readings may indicate. Refer to
Troubleshooting and correct as soon as possible.
1. Daily inspections
Check current and ammeter fluctuation daily. If ammeter fluctuation is great, even though within the limits of pump
rating, foreign matter may be clogged the pump. If the volume of liquid discharged falls suddenly, foreign matter
may be blocked the suction inlet.
2. Regular inspections
Monthly inspections
Measure the insulation resistance. The value should be more than 1M ohm. If resistance starts to fall rapidly
even with an initial indication of over 1M ohm, this may be an indication of trouble and repair work is required.
Annual inspections
To prolong the service life of the mechanical seal by replacing the oil in the mechanical seal chamber once a
year. Water mixed the oil or cloudy textures are indications of a defective mechanical seal requiring
replacement. When replacing the oil, lay the pump on its side with filler plug on top. Fill suitable amount turbine
oil No.32 (ISO VG-32).
Inspections at 3-5year intervals
Conduct an overhaul of the pump. These intervals will help to avoid possible failure in future.

8
3. Parts need to be replaced
Replace the appropriate part when the following conditions appear.
Replaceable part Mechanical seal Oil filler plug gasket Lubricating oil O-ring
Condition Oil in mechanical
seal chamber
Inspect or replace
the oil
Oil is clouded or
dirty
Overhaul the pump
Frequency Annual Half a year Half a year Annual
Note: Above replacement schedule is based on normal operating conditions.

9
Exploded View

10
List of Parts
NO Name Material Photo NO Name Material Photo
1 Handle Nylon 6
"'
10 Impeller Hytrel
2
Motor Cov-
er
ACD12 11 Packing NBR
0
3 Packing NBR
0
12 Pump Casing
FC-200
4
End Brack-
et
SECC 13 Agitator
SMF5030
5 Shaft SUS410 14 Flange
FC-15
6
Motor
Housing
ADC12 15 Packing NBR
7 Seal Casing
FC-15
16 Strainer PVC
8 O-ring NBR 0 17 Cable H07
9
Mechanical
Sea I
Upper:CA/CE
Lower:SiC/SiC
18
Capacitor
(Single Phase
Only)

Troubleshooting
Trouble
Cause
Remedy
Does not start.
Starts, but
immedi ately stops.
(1) Power failure
(1)-(3) Contact electric power company
and devise countermeasures
(2) Large discrepancy between power source and volt-
age
(3) Significant drop in voltage
(4) Motor phase malfunction
(4) Inspect electric circuit
(5) Electric circuit connection faulty
(5) Correct wiring
(6) Faulty connection of control circuit
(6) Inspect connections and magnetic coil
(7) Fuses is blown
(7) Check circuit then replace fuse
(8) Faulty magnetic switch
(8) Replace with correct one
(9) Water is not at level indicated by Float
(9) Raise water level
(10) Float is not in appropriate level
(10) Adjust the position of float
(11) Float is not effective
(11) Repair or replace
(12) Short circuit breaker is functioning
(12) Repair location of short circuit
(13) Foreign matter clogging pump
(13) Remove foreign matter
(14) Motor burned out
(14) Repair or replace
(15) Motor bearing broken
(15) Repair or replace
Operates, but stops
after a while.
(1) Prolonged dry operation has activated motor protec-
tor and caused pump to stop
(1) Raise water level to C.W.L
(2) High liquid temperature has activated motor protec-
tor and caused pump to stop
(2) Lower liquid temperature
(3) Reverse rotation
(3) Correct rotation
Does not pump. In-
adequate volume.
(1) Reverse rotation
(1) Correct rotation (see Operation)
(2) Significant drop in voltage
(2) Contact electric power company
(3) Operating a 60Hz pump with 50Hz
(3) Check nameplate
(4) Discharge head is high
(4) Recalculate and adjust
(5) Lame oioinq loss
(5) Recalculate and adjust
(6) Low operating water level causes air suction
(6) Raise water level or lower pump
(7) Leaking from discharge piping
(7) Inspect, repair
(8) Clogging of discharge piping
(8) Remove foreign matter
(9) Foreign matter in suction inlet
(9) Remove foreign matter
(10) Foreign matter clogging pump
(10) Remove foreign matter
(11) Worn impeller
(11) Replace impeller
Over current
(1) Unbalanced current and voltage
(1) Contact electric power company
(2) Significant voltage drop
(2) Contact electric power company and
devise countermeasure
(3) Motor phase malfunction
(3) Inspect connections and magnetic
switch
(4) Operating 50Hz pump on 60Hz
(4} Check nameplate
(5) Reverse rotation
(5} Correct rotation (see Operation2)
(6) Low head. Excessive volume of water
(6) Replace pump with high head pump
(7) Foreign matter clogging pump
(7) Remove foreign matter
(8) Motor bearing is worn out or damaged
(8} Replace bearing
Pump vibrates;
excessive
operating
noise.
(1) Reverse rotation
(1) Correct rotation
(2) Pump clogged with foreign matter (2) Disassemble and remove foreign
matter
(3) Piping resonates
(3) Improve piping
(4) Strainer is closed too far
(4) Open strainer
11

Disassembly and Assembly
1. Disassembly-
When disassembling pump, have a piece
of cardboard or wooden board ready to place
the different parts on as you work. Do not pile
parts on top of each other. They should be laid
out neatly in rows. The “O” ring and
gasket
cannot be used again once they are removed.
Have replacement parts ready. Disassemble in
the following order, referring to the sectional
view.
Be sure to cut off
power source
before
disassembly.
(1) Remove pump casing bolts, raise the motor
section, and remove pump casing.
(2) Remove shaft head bolt and impeller.
(3) Remove oil filler plug and drain lubricating
oil.
(4) Remove intermediate casing bolts and oil
chamber.
(Remember that any lubricating oil
remaining in the mechanical seal
chamber will flow out.)
(5) Carefully remove mechanical seal,
beware of not to scratch sliding
surface of motor shaft.
2. Assembly-
Re-assemble in reverse order of
disassembly.
Be careful of the following points.
(1) During re-assembly, rotate the impeller by
hand and check for smooth rotation. If
rotation is not smooth,
perform steps-(3) through -(5) again.
(2) Upon completion of re-assembly step -
(1) rotate the impeller by hand from the
suction inlet and
check that it rotates smoothly without
touching the suction cover before
operating the pump.
Please order “O” rings, packing, shaft seals
and other parts from, your dealer.
12

13
Appendices:
Technical Data:
AHS-05
DS-A05-005
AHS-10
DS-A05-009
AHS-10HH
DS-A05-001
AHS-25HH
DS-A05-013
Specifications:
AHS-05
DS-A05-006
AHS-10
DS-A05-010
AHS-10HH
DS-A05-002
AHS-25HH
DS-A05-014

14
Notes
Industrial Flow Solutions Operating, LLC • 104 John W Murphy Drive, New Haven, CT 06513, USA • 860-399-5937 • www.flowsolutions.com
Stancor™ is a trademark of Industrial Flow Solutions Operating, LLC. All rights reserved.