Infrastructure Development Standards
PART 8.2:
SUBMERSIBLE WASTEWATER PUMPS
PART 1 - GENERAL
I
II
III
IV
SECTION INCLUDES
A.
Wastewater pumps
B.
Factory pump tests
C.
Control panel
D.
Spare parts
QUALITY ASSURANCE
A.
The proposed equipment shall comply with the latest issue of the National Electrical Code
and applicable NEMA standards.
B.
Equipment shall be manufacturer's standard, suitable for industrial and municipal service in
a municipal wastewater environment.
SUBMITTALS
A.
Furnish certified shop drawings and product data as required in Section 01330. Provide
operations and maintenance data.
B.
The shop drawings shall include, as a minimum, the following:
1.
Pump outlines and dimensions
2.
Pump weight
3.
Anchor bolt location for the base discharge elbow and the guide rails
4.
Electrical schematics and interconnecting wiring diagrams showing extent of factory
prewiring
5.
Power and control terminal connections
6.
Assembly details
7.
Certified pump curves showing pump performance characteristics of supplied pump
with pump and system operating point plotted
8.
Operation, maintenance, and installation instruction books
9.
Recommended spare parts list
WARRANTY
A.
The manufacturer shall warrant the pump to be supplied to the owner for a period of five
(5) years under normal use. This warranty shall not be in preprinted form.
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Infrastructure Development Standards
PART 2 - PRODUCTS
I
II
ACCEPTABLE MANUFACTURERS
A.
Hydromatic
B.
Barnes
WASTEWATER PUMP
A.
The pump shall be a centrifugal, non-clog, solids handling, submersible, and wastewater
type. The pump volute, motor and seal housing shall be high quality gray cast iron,
ASTM A-48, Class 30. The pump discharge shall be fitted with a standard ASA 125 lb.
flange, faced and drilled. All external mating parts shall be machined and Buna N Rubber
O-ring sealed on a beveled edge. Gaskets shall not be acceptable. All fasteners exposed
to the pumped liquids shall be 300 series stainless steel.
B.
Impeller shall be of the two-vane, enclosed non-clogging design and have pump-out
vanes on the front and backside of the impeller to prevent grit and other materials from
collecting in the seal area. Single vane design impellers which cannot be easily trimmed
and which do not maintain balance with wear causing shaft deflections and reducing seal
and bearing life are not acceptable. Impeller shall not require coating. Because most
impeller coatings do not remain beyond the very early life of the impeller, efficiency and
other performance data submitted shall be based on performance with an uncoated
impeller. Attempts to improve efficiency by coating impeller shall not be acceptable.
Impellers shall be dynamically balanced. The tolerance values shall be listed below
according to the International Standard Organization grade 6.3 for rotors in rigid frames.
The tolerance is to be split equally between the two balance planes which are the two
impeller shrouds. Tolerance should be 0.02 in.–oz./lb. of impeller weight for 1750 RPM.
The impeller shall be threaded shaft or tapered shaft and key driven. A 300 series
stainless steel washer and impeller bolt shall be utilized to secure the impeller to the
shaft for both threaded and tapered shafts. Straight end shafts for attachment of the
impeller shall not be acceptable. A volute case wear ring shall be provided to minimize
impeller wear. Wear ring shall be bronze ASTM B-584-932 alloy 315.
C.
Motor Specifications
1.
The stator, rotor and bearings shall be mounted in sealed submersible type
housing. The stator windings shall have Class F insulation (155˚C or 311˚C), and
a dielectric oil filled motor, NEMA B design. Further protection shall be provided
by on winding thermal sensors. Because air-filled motors do not dissipate heat
as efficiently as oil-filled motors, air-filled designs shall not be acceptable. The
pump and motor shall be specifically designed so that they may be operated
partially or completely submerged in the liquid being pumped. The pump shall
not require cooling water jackets. Dependence upon, or use of, water jackets for
supplemental cooling shall not be acceptable. Stators shall be securely held in
place with a removable end ring and threaded fasteners so they may be easily
removed in the field without the use of heat or a press. Stators held by a heat
shrink fit shall not be acceptable. Stators must be capable of being repaired or
rewound by local motor service station. Units which require service only by the
factory shall not be acceptable. No special tools shall be required for pump and
motor disassembly. Pump shall be equipped with heat sensors. The heat sensor
shall be a low resistance, bi-metal disc that is temperature sensitive. It shall be
mounted director on the stator windings and sized to open at 120˚C and
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Infrastructure Development Standards
2.
3.
4.
5.
automatically reset at 30-35˚C differential. The sensors shall be connected in
series with motor starter coil so that the starter shall be equipped with 3 leg
overload heaters so all normal overloads are protected by the starter.
An upper radial bearing and a lower thrust bearing shall be required. These shall
be heavy-duty single row ball bearings which are permanently lubricated by the
dielectric oil which fills the motor housing. Double row, sealed grease packed
bearings shall not be acceptable. Bearings which require lubrication according to
a prescribed schedule shall not be acceptable. The shaft shall be machined from
a solid 303 stainless steel forging and be a design which is of large diameter with
minimum overhang to reduce shaft deflection and prolong bearing life.
The pump shall have two mechanical seals, mounted in tandem, with an oil
chamber between the seals. John Crane Type 21, BF1C1, seals shall be used
with the rotating seal faces being carbon and the stationary seal faces to be
ceramic. The lower seal shall be replaceable without disassembly of the seal
chamber and without the use of special tools. Pump-out vanes shall be present
on the backside of the impeller to keep contaminates out of the seal area. Units
which require the use of tungsten-carbide seals or foreign manufactured seals
shall not be acceptable. Seals shall be locally available. The pump shall be
equipped with a seal leak detection probe and warning system. This shall be
designed to alert maintenance personnel of lower seal failure without having to
take the unit out of service for inspection or requiring access for checking seal
chamber oil level and consistency. There shall be an electric probe or seal failure
sensor installed in the seal chamber between the two tandem mechanical seals.
If the lower seal fails, contaminants which enter the seal chamber shall be
detected by the sensor and send a signal to operate the specified warning
device. Units equipped with opposed mechanical seals shall not be acceptable.
Electrical power cord shall be STW-A, water resistant 600V, 60˚ C, UL and CSA
approved and applied dependent on amp draw for size. The pump shall be triple
protected with a compression fitting and two epoxy potted areas at the power
cord entry to the pump. A separation between the junction box area of the
pump and the motor by a stator lead sealing gland or terminal board shall not be
acceptable. The power cable entry into the cord cap assembly shall first be
made with a compression fitting. Each individual lead shall be stripped down to
bare wire at staggered intervals, and each strand shall be individually separated.
This area of the cord cap shall then be filled with an epoxy compound potting
which will prevent water contamination to gain entry in the event of wicking or
capillary attraction. The power cord leads shall then be connected to the motor
leads with extra heavy connectors having brass inserts with a screwed wire to
wire connection, rather than a terminal board that allows for possible leaks. The
connection box wiring shall be separated from the motor housing wiring by
stripping each lead down to bare wire, at staggered intervals, and separating
each strand. This area shall be filled with an epoxy compound potting.
Fiberglass terminal boards which are subject to heat fatigue and cracking, and
which may lead to possible leaks shall not be acceptable. The cord cap assembly
where bolted to the connection box assembly and the connection box assembly
where bolted to the motor housing shall each be sealed with a Buna N Rubber Oring on a beveled edge to assure proper sealing.
The pump shall be non-overloading throughout the entire range of operation
without employing service factor. The pump shall reserve a minimum service
factor of 1.20. The performance curve submitted for approval shall state in
addition to head and capacity performance, the pump efficiency, solid handling
capacity, and reflect motor service factor.
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Infrastructure Development Standards
III
E.
Pump Lifting Systems
Each pump shall be provided with a type 316 stainless steel lifting chain. The device
attaches to the pump handle and will be used in emergency situations only. Chain
attachments to pump lifting bale shall be stainless steel.
F.
Pump Guide Rails
Furnish a quantity of two 304 stainless steel schedule 40 guide rails for each pump to
permit raising and lowering. The guide rails shall reach from the top of the discharge elbow
to the upper guide rail holder on the access frame or on the vertical face of the concrete
opening. Lifting bales shall be made of stainless steel material sufficient for the weight of
the pump.
FACTORY PUMP TESTING
A.
IV
Commercial testing shall be required and include the following:
1.
The pump shall be visually inspected to confirm that it is built in accordance with
the specification as to HP, voltage, phase and hertz.
2.
The motor seal and housing chambers shall be meggered for infinity to test for
moisture content or insulation defects.
3.
Pump shall be allowed to run dry to check for proper rotation.
4.
Discharge piping shall be attached; the pump submerged in water and amp
readings shall be taken in each leg to check for an imbalanced stator winding. If
there is a significant difference in readings, the stator windings shall be checked
with a bridge to determine if an unbalanced resistance exists. If so, the stator
shall be replaced.
5.
The pump shall be removed from the water, meggered again, dried and the
motor housing filled with dielectric oil.
CONTROL PANEL
A.
General
1.
The sewage pump control panels shall be self contained complete duplex pump
control units containing the features described herein to be installed at the site as
indicated on the Drawings. The Electrical Service for the control panel be grounded
with an Ohmic Value of 15 Ohms or less.
2.
There shall be permanently affixed to the inside of the exterior enclosure door a
data plate indicating the voltage, phase, horsepower, full load amps, order
reference number, condition of service, date manufactured, and the control panel
manufacturer's name, address, and telephone. A laminated wiring diagram and bill
of material must be updated to reflect the actual construction and shall be labeled
“As Built” and permanently affixed to the inside of the exterior enclosure door.
3.
All power wire shall be stranded copper and sized as required for load and
application according the NEC. All control and signal wire shall be stranded copper,
a minimum of #14 AWG, 90 degree insulated, and color coded. All wiring on the
rear of the interior door shall be neatly bundled using tie wraps or other means. All
internal wiring on the back plate shall be neatly routed in grey Panduit wire duct
with removable covers. All wiring shall be continuous point to point (no splices)
and be totally accessible with permanent number marking on each end to match
the control schematic drawings. Extra spare wires shall be pulled from junction box
to the control panel for motor leads (three (3) wires) and controls (six (6) wires)
before pouring seal-off with Chico sealant.
4.
All conduit entrances shall be made in a NEC approved manner. The conduits to
the wet well shall have approved seal off fittings installed and properly sealed to
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Infrastructure Development Standards
5.
6.
7.
protect the control panel from adverse damage from the wet well. Seal offs shall
be installed between the junction box and the control panel, with spare wires pulled
into control panel. Seal offs are to be sealed with Chico Sealing Compound,
properly installed per manufacturer’s specifications.
All components shall be securely mounted to the back plate with stainless steel
machine screws. The screws shall be of adequate size for the device being
secured. Mounting holes on the back plate for component mounting shall be
machine drilled and tapped; self tapping screws shall not be acceptable.
Permanent marking to identify each component, as shown on the “As Built”
schematics, shall be provided on the back plate.
The panel shall be manufactured using quality workmanship and components.
Upon completion of the panel it shall be completely factory tested. All control and
alarm operations shall be performed with external signals simulated to insure
proper operations.
Enclosure Construction and Materials
The pump control and power equipment shall be housed in a NEMA 3R/12,
stainless steel enclosure. Material used shall be 14 gauge, Type 304 stainless steel
with a 2B brushed finish. Construction shall provide rounded edges and solid seam
welded. The completed enclosure shall have all welded seams ground smooth to a
radius and buffed. The enclosure shall be mounted as shown, sized to house all
the required components, and have adequate space for testing and maintenance as
necessary. The enclosure shall have back plate mounting studs, 3-point door latch
and door lock and continuous hinge, all of stainless steel. The door gasket shall be
of a molded continuous rubber composition to provide a positive weatherproof door
seal. Provide permanent lettering, 4-inch high, on outside of door showing lift
station identification. Panel shall be mounted on concrete post 6” x 6” x 8’, with 1
½” x 1 ½” aluminum strut.
The panel shall have a hinged inner door (dead front) of brushed aluminum with
latches, as required, to protect all live internal wiring from operator personnel. The
inner door shall be able to be opened to a minimum of 90 degrees to allow for safe
access to the interior components. Cutouts for circuit breaker handles shall be
provided to allow the operation of all circuit breakers through the inner door. All
control switches, indicator pilot lights, elapsed time meters, and motor starter
overload reset pushbuttons, amp meters, and alarm auto dialer shall be mounted
on the inner door.
The inner door shall be designed so that the mounting will not in any way
penetrate the exterior of the control panel enclosure and deteriorate the NEMA
rating. It shall also be designed to allow and provide full access to the sides, top,
and bottom of the control panel for power and control conduit entrance.
Power Distribution
a.
The panel power distribution shall include all components as indicated
below and be completely wired with stranded conductors having a
minimum of 90 degree insulation rating and an ampacity rating a minimum
of 125% of the motor full load ampere rating. All power wiring shall be
neatly routed and totally accessible. All conductor terminations shall be as
recommended by the device manufacturer and be secure to provide
adequate electrical conductivity.
b.
The panel shall have a normal and emergency main circuit breaker to allow
manual positive switching from the utility normal power source to a remote
connected auxiliary standby power source when the normal power has
failed. The voltage rating shall match that of the incoming service. They
shall be mounted side by side with a permanently attached positive
mechanical interlock mechanism made of aluminum. The interlock must
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Infrastructure Development Standards
8.
provide that only one breaker shall be in the "ON" position at any given
time. The interlock must be easily switched between the two breakers
only when both breakers are in the "OFF" position.
The line side of the normal breaker shall have adequately sized lugs
attached to provide connection of the incoming normal power source
conductors. The line side of the emergency breaker shall be wired to an
exterior mounted standby generator power receptacle or permanent
mounted stand-by generator, if required. The load side of the normal and
emergency circuit breakers shall feed a power distribution block so branch
breakers can be single feed.
Normal and emergency circuit breakers shall be manufactured by Square
D.
c.
The external power receptacle for the connection of a standby generator
shall match the system type. The receptacle shall be of reverse service
design, 600 volt, 100 amp. It shall be securely mounted on the external
right side of the control panel and shall be fully accessible. The receptacle
shall be totally weatherproof with a cover over the plug access opening.
Receptacle shall be Crouse Hinds, 100 amp, 4 wire, 600 volt, model
AR1041 with a 45 degree angle adapter.
Generator receptacle is not required if standby generator is required.
d.
The pump motor breakers shall be thermal magnetic trip devices and shall
provide for individual motor disconnect and overload/short circuit
protection as required by the NEC. The breakers shall be three (3) pole
and shall have a trip rating as indicated on the drawings, but shall not
exceed the NEC rating for motor branch circuit protection. The voltage
rating shall match that of the panel incoming service. The breaker handles
shall be totally accessible through the inner door. Pump circuit breakers
shall be manufactured by Square D.
e.
For all pumps less than 15 HP, the motor starters shall be NEMA rated
three (3) pole devices. They shall provide the electrical start/stop control
and overload protection for each pump and have 120 volt operation coils.
Starters shall have electronic overloads rated per the specific name plate
ampere rating of the pump motor and must be checked upon final
inspection, prior to start up.
Motor starters shall be manufactured by Square-D or Allen Bradley.
f.
For all pumps, 15 HP or larger, the motor starters shall be smart motor
controller softstarters, model SMC-3 as manufactured by Allen Bradley.
Control Panel Accessories
a.
The panel power accessories shall include all components as indicated
below and must be completely wired with stranded copper conductors. All
wiring shall be neatly routed and sized as required per NEC with a
minimum wire size #12 AWG.
b.
The control panel shall have lightning arrestor protection. The arrestor
shall be mounted on the load side of the main disconnect switch to protect
the motors and control equipment from lightning induced line surges. It
shall be 600 volt rated and be a three phase unit with connection to
ground and/or neutral. The lightning arrestor shall be mounted on the
incoming power source and shall be properly wired to all three phases and
ground.
The lightning arrestor shall be model Protector P+ model PTX080.3D101
for 230 Vac, 3 ph service, and model PTX008.NN400 for 480 Vac, 3 ph
phase service as manufactured by Innovative Technology.
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Infrastructure Development Standards
c.
d.
e.
f.
g.
B.
A three-phase monitor relay shall be installed to protect the motors. It
shall be a three-phase voltage sensing device that is adjustable for the
system nominal voltage. It shall protect the control panel from loss of a
single phase, even with a three-phase motor running on line, low voltage
on all three phases simultaneously, and phase sequence reversal.
An output contact shall be wired in the pump motor starter control circuit.
Should the phase monitor trip, the phase monitor shall shut down the
pumps, and shall automatically reset when the nominal voltage is restored
to allow the pumps to restart.
Phase monitor shall be model PWRA 240, 8-pin for 230 volt systems and
PWRA 460, 8-pin for 460 volt systems, as manufactured by Syclex, or City
approved equal.
The phase monitor shall be protected by a one-half amp circuit breaker.
A Ground Fault Interrupting, duplex receptacle shall be mounted on the
inner door to provide a 120 Vac, 20-amp service. A 20 ampere rated, one
(1) pole shall be provided for receptacle. The circuit breaker handle shall
project through the inner door. The 120 Vac control circuit breaker shall
be manufactured by Square D.
The 120Vac common control circuit shall be protected by an auxiliary one
(1) pole circuit breaker. The circuit breaker handle shall project through
the inner door. The 120Vac control circuit breaker shall be manufactured
by Square D.
The control panel shall have surge arrestor protection included within the
unit to protect the unit from damaging transient voltage surges. Surge
arrestor shall be mounted between load side of power distribution block
and line side of main circuit breaker and shall be properly wired to all three
phases and ground. Surge arrestor shall be Ditek model DTK240-3CM for
230 Vac, 3 ph service or DTK480-3CM for 480 Vac, 3 ph service.
Power and control wiring for pumps control from control panel to wet well
shall be installed in 2-inch schedule 40 PVC conduits, two 2-inch conduits
for pumps and one 2-inch conduit for a transducer or floats, if used. Trim
excess float wire as required. For underground runs, use PVC, and for
above-ground runs, use aluminum rigid conduit. All nipples, locknuts, and
conduit fittings shall be aluminum. All Kindorf strut shall be aluminum or
stainless steel.
Duplex Pump Controls
The control circuit shall provide for the automatic and manual control and alternation of the
pumps to maintain a pumped down condition of the wet well. The control system shall be
intrinsically safe and shall sense the wet well level through floats or a birdcage pressure
transducer with a controller and alternator, that shall include all pumps off level, lead pump
on level, lag pump on level, and high alarm level to control the pumps operation and
provide alarms. The set point elevations shall be as indicated on the drawings. If birdcage
pressure transducer is used, then a back up float shall be installed.
Each pump shall have indication and/or shutdown for motor thermal protection, motor
overload alarm, pump failed alarms, and seal failure alarm.
The controls shall include the following features:
1.
A three (3) position selector switch mounted on the inner door shall provide the
HAND, OFF, or AUTOMATIC operating mode selection for each pump. The
switches shall be oil tight with 10 ampere rated contacts as required. An engraved
name plate shall be provided for each switch for position indication and identity. In
HAND position the pumps shall run continuously without regard to the level sensing
devices. In AUTOMATIC position the pumps shall respond to the floats or level
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Infrastructure Development Standards
2.
3.
4.
5.
6.
7.
8.
C.
transducer in the wet well and start and stop based on the level sensing devices.
In the OFF position, the pumps shall be locked out and shall not be allowed to
operate.
Three (3) position selector switches shall be 9001-SKS (3) position selector switches
shall be 9001-SKS series as manufactured by manufactured by Square D.
A run pilot light shall be mounted on the inner door for each pump to indicate when
the motor starter is energized and the pump is running. The pilot lights shall be
120 Vac, oil tight, with a green lens.
If floats are used, liquid level indicating pilot lights shall be used. The indicator
lights shall indicate the position of each float in the wet well. The pilot lights shall
be 120 Vac, oil tight. The OFF level indicator pilot light shall have a clear or white
lens; the lead level indicator pilot light shall have a green lens; the lag level
indicator light shall have a yellow or amber lens; and the high level indicator pilot
light shall have a red lens. Indicator pilot lights shall be E22HV series as
manufactured by Cutler Hammer or equal.
If floats are used, a momentary toggle switch for each float shall be used to test
the float sequence.
An elapsed time meter shall be mounted on the inner door for each pump to record
the accumulated running time of the pump motor. It shall run when the pump is
operated in HAND or AUTOMATIC mode of operation. It shall be 120 Vac, nonresettable, and time recorded in hours (6 digits) and tenths of hours. Elapsed time
meters shall be model 711-0190 as manufactured by Redington, Inc.
An alternator relay shall be provided to automatically provide alternation of the lead
pump upon completion of each pumping cycle. It shall be 120 Vac, solid state plug
in type device with DPDT (double pole, double throw) form C, 10 ampere rated
contacts and two LED position indicators to show the alternator position.
It shall also allow the lag pump to operate as backup on demand. The alternating
relay shall be a PJRXS-110A, as manufactured by Syrelec, Inc.
An alternator test switch shall be provided on the inner door to allow testing of the
alternating relay function. It shall be a toggle type and shall have two positions,
ALT for normal automatic alternator operation and TEST for testing of alternation.
Switch shall have only a momentary contact for the TEST position. The test cycle
operation, when repeated, shall clock the alternator and assure proper alternator
operation.
A lag pump delay timer shall be provided to delay the state of the lag pump after
an interruption in utility power to the control panel and the demand for both pumps
to run exists. During normal automatic operation, the timer shall allow the lag
pump to start immediately when called for. The timer should be adjustable and set
for 10 to 15 seconds.
A single channel intrinsically safe isolation relay shall be used for each float
connection. Spacing on the back panel for intrinsically safe circuits must be
adhered to.
Isolation relays shall be ISO-120-AFA as manufactured by
ATC/Diversified Electronics.
Control relays, when used shall be 8501-KP12 series as manufactured by Square D.
Alarm Systems and Monitoring
Each of the following alarm functions shall be included in the control panel to continually
monitor the specific condition for which it is intended and provide the indication and
response described.
1.
The exterior mounted alarm light shall be a weather proof, shatter proof, strobe
light fixture. The alarm light shall be 12 Vdc with a red lens. The alarm light shall
be pole mounted one (1) foot above the top of the control panel. The general
alarm light shall be turned on by any alarm function. The light shall be turned off
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Infrastructure Development Standards
2.
3.
4.
5.
6.
7.
8.
when the alarm condition is corrected or if the alarm circuit is manually reset, if
required. An indicator pilot light on the inner door shall show which of the alarm
conditions has caused the exterior general light to be turned on. Alarm light shall
be model 490-S-1280 as manufactured by Tomar, Inc.
Audible Alarm Horn
The exterior mounted audible alarm horn shall be a weather proof, 80 decibels
(min.), 12 Vdc device to provide an audible signal to indicate alarm conditions exist.
The exterior mounted audible alarm horn shall be turned on by any alarm function
that also turns on the alarm light. An exterior alarm silence pushbutton shall be
used to silence the audible alarm horn. The alarm silence circuitry shall
automatically reset when the alarm condition has been corrected or manually reset.
The exterior alarm horn shall be a model 450-12-30 with a WB weather proof back
box as manufactured by Federal Signal Corp.
The exterior mounted alarm light and audible alarm horn shall be backed up with a
12 Vdc, 7AH standby power supply (battery) with a 120 Vac battery charger. The
standby power source is used to power the alarm system when normal power has
been interrupted. The backup power system shall be a model BB12-7AH as
manufactured by Ingram Products, Inc., or equal.
The high alarm level shall close on a high wet well level condition and turn on the
general alarm light and audible alarm horn. The high level float indicator light shall
indicate that the high level alarm is the condition that caused the general alarm
light and audible alarm horn to be turned on. The general alarm, high level
indicating pilot light, and the audible alarm horn shall be turned off when the high
wet well level condition has cleared.
The pumps shall be provided with a seal failure alarm relay and an oil tight, 120
Vac indicator pilot light, located on the inner door, with a red lens to indicate a
pump seal failure condition has occurred. The relay shall be a liquid sensing
induction type relay and shall have a secondary circuit wired to terminals for each
pump that shall be connected to the moisture sensing probe in each pump’s seal
chamber. If probe senses moisture, the seal failure relay shall turn on the seal
failure alarm pilot light to indicate the alarm condition. The pump shall be taken
out of service by the seal failure alarm. The seal failure alarm pilot light shall
remain on until it is manually reset.
The pumps shall be provided with a thermal alarm relay and an oil tight, 120 Vac
indicator pilot light, located on the inner door, with a red lens to indicate the
condition. Terminal blocks shall be provided for connecting the normally closed
thermal sensing contact located in each motor windings for motor thermal
protection. An abnormal rise in motor winding temperature shall cause the thermal
alarm relay to shut down the pump motor and turn on the high temperature red
alarm pilot light. The pump shall be taken out of service by the thermal alarm.
The thermal alarm pilot light shall remain on until it is manually reset.
A Sensaphone Auto-Dialer unit shall be provided for a remote interface signal
through the telephone line installed at the lift station site. Each contact to the auto
dialer shall be a dry contact that is open during normal operation and that closes
when alarm condition exists. The contacts shall open again once the alarm
condition is corrected or the alarm is reset. The alarm conditions monitored shall
include control panel temperature, phase failure, and high wet well level. The
Sensaphone auto dialer shall be a FGD-0400 as manufactured by Phonetics, Inc.
(Sensaphone.)
Each pump shall have an amp meter push button mounted on the inner door and a
current transformer mounted on the back plate to measure the motor amperes
during a run cycle. Ammeter current transformers shall be wired as to indicate the
“A” phase of the motor wire. The ammeter face plate should be scaled so the full
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Infrastructure Development Standards
load amperes (FLA) of the motor shall be in the midrange of the operational value
of the ammeter face plate. The current transformer should be a 0-5 ampere scale
with a xx:5 ratio. The ammeter shall display the amperage of the motor when the
ammeter pushbutton is pressed. The ammeters shall be a model YE-250-340
series as manufactured by Yokogawa. The current transformers shall be a model
2SFT series as manufactured by Instruments Transformer, Inc. (ITI) The ammeter
pushbuttons shall be 9001-SKR series as manufactured by Square D.
V
D.
Drawings and Markings
1.
Panel Marking
a.
All component parts in the control panel shall be permanently marked and
identified as they are indicated on the control drawings. Marking shall be
on the back plate adjacent to the component.
b.
All control panel conductors shall be permanently number marked with
wire markers at each end as close as practical to the termination of the
conductor.
2.
Nameplates
a.
The panel shall include engraved nameplates on the inner door for all
components to indicate the device function. The nameplates shall be
permanently affixed with plated machine screws or a bonding adhesive
suitable for the application. The material shall be white with a black core.
3.
Final Drawings
a.
Upon completion of the panel a complete set of As Built drawings and Bill
of Materials shall be supplied to the owner. The drawings shall include a
power and control schematic and a terminal block diagram showing each
remote connection to the panel. An adhesive mylar copy of the schematic
drawings and terminal diagram must be permanently affixed to the inside
of the control panel door.
E.
Float switches shall be "Roto-float" as manufactured by Anchor Scientific or approved equal.
F.
Installation shall include NEMA 4X, 304 Stainless Steel electrical junction box, minimum size
14” x 12” x 6”, with padlock hasp. Items mounted on the backplate shall include pump
power blocks, control terminal strip, and ground bar.
SPARE PARTS
A.
The spare parts for each control panel shall include one spare alternator, one complete
spare relay with base and spring retaining clip, and one spare phase monitor relay with
base.
PART 3 - EXECUTION
I
INSTALLATION
A.
Install pumps on bases as shown in strict accordance with manufacturer's requirements.
B.
Provide discharge piping as shown on the Contract Drawings.
elbows.
C.
Provide services of manufacturer's representative to verify proper installation and operation,
perform final alignment, and instruct owner's personnel. Representative shall be an
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Provide supports under
Infrastructure Development Standards
authorized service representative and not a sales representative. Allow a minimum of one
man-day for these tasks.
D.
II
Contractor shall be responsible for labor, materials, and fees required to provide electrical
service to the proposed control panel.
PUMP SCHEDULE
Number
Service
Manufacturer/Model
Operating Point 1
Motor HP (min.)
Motor Speed (maximum)
Electrical Characteristics
__
Each
Raw Sewage
__________ / ______
____
gpm @ __ TDH
__
______
RPM
____V/_
Ø 60Hz
END OF SECTION
11