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SECTION 15453

PLUMBING PUMPS

PART 1 GENERAL

1.1 Related Documents

A. Drawings and general provisions of Contract, including General and Special

Conditions and Division-1 Specification sections, apply to work of this section.

B. The requirements specified in this section apply to all related sections in this
Division, the requirements of all related sections, elsewhere in this division also
apply to this section unless specified to the contrary.

1.2 Description of Work

A. Work includes providing all labor, supervision, materials, equipment,

accessories, services and tests necessary to complete, make ready and set to
work for acceptance by the Owner, all pumps for the plumbing systems in
accordance with Drawings and Specifications.

B. Provide factory start-up for domestic water booster system, sewage ejectors
and sump pumps.

1.3 Quality Assurance

A. Acceptable manufacturers: Firms regularly engaged in manufacture of products

of types and capacities required, whose products have been in satisfactory use
in similar service for not less than 5 years. Provide products produced by a
manufacturer listed as an Acceptable Manufacturer in this section as approved
by the Architect/Engineer.

1.4 Submittals

A. Product Data: Submit manufacturer's data including printed technical literature,

installation instructions, and catalogue cuts for materials, parts, devices, finish,
dimensions, detail of valving and piping arrangements, wiring diagrams of
prewired controllers, required control wiring and power wiring diagrams. Written
description of sequence of operation, pump curves indicating service
conditions, written operating instructions including start-up and shut-down.
Maintenance data including written instructions on items requiring periodic
maintenance and parts list and certification that pumps have been hydraulically
tested for pressure and flow.

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PART 2 PRODUCTS
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2.1 Domestic Water Booster Pumping Systems

A. Furnish and install factory packaged pumps constant pressure variable speed
booster system with all controls, motors, valves, etc., mounted on a common
concrete base. The system shall be capable of automatically providing a
constant system pressure with a flow rate range as indicated on the plans.
System shall require only bolting in place to housekeeping pad and installation
of the shaft columns. The system will include space and blind tee on both
suction and discharge manifolds for future addition of a pump. Pump
construction shall be of the bronze fitted type with cast-iron casing.

Ship system premounted onto positioning top, rails connected to the base
flange and companion flange, all with required lifting lugs to aid in installation.

B. Pump Description: variable speed vertical multi stage diffuser.

1. Motor: Ball Bearing squirrel cage induction type

2. Casing: Cast Iron
3. Casing wear rings: Bronze
4. Impeller: Bronze end suction Type
5. Shaft: Stainless steel 416SS
6. Seal: Mechanical, Ni-resist and carbon faces
7. Bearings: Grease lubricated cartridge type

C. Each pump to have vibration-isolating mounts and be fitted with a separate

prewired temperature probe and approved electrical purge valve installed
immediately upstream of each pressure reducing valve.

D. Each pump shall be equipped with thermal safety valve which will open and
discharge water to drain when temperature exceeds 38°C. Contractor shall run
lines to drain. Sequence of Operation:

1. The lead pump will operate continuously for flows from 0 to 50% of system
capacity.
2. As system flow increases, the pump designated lag pump will start, and
operate with the lead pump.
3. As system flow decreases, the sequence of pump operation will automatically
reverse.
4. Manual or automatic alternation shall make it possible to switch lead/lag and
standby between pumps.
5. A low cistern water level switch will automatically cut out all pumps.

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E. Provide a spring loaded, non-slam silent check valve combination on each

pump discharge line with feed line piping and isolation valves. Suction and
discharge headers shall be same material as connecting piping. Provide
dielectric couplings between dissimilar materials.

F. Power and Control Panel Furnish a single enclosure power and control panel
NEMA 1. Enclosure shall be steel and furnished with an industrial grade
enamel. It shall house all control components including:

- Circuit breaker disconnect switches through door with door interlock.

- Magnetic across-the-line starter with 3 phase overload protection
- Pump running lights
- H-O-A selector switches
- 220-volt control transformer
- Alarm indicating lights
- Audible alarm with silencing button, and remote trouble alarm
contacts
- Set of necessary control relays and other accessory devices required
to permit the system to operate in conformance with specification
- Mercoid adjustable deadband pressure switches
- Low suction level cut-out circuit to interface with suction tank controls
- Variable speed converter.

All of the above to be factory internally prewired and tested in accordance with
the provisions of the National Electrical Code.

All control wires shall be individually numbered and each component shall be
labeled accordingly. All internal wiring shall be copper stranded, A.W.G. with a
minimum insulation of 90 degrees C. The complete assembly shall have a UL
listing mark for industrial control panels.

2.3 Transfer Domestic Pumping Systems & Water Tank Circulating Pumping
System

A. Furnish and install factory packaged end suction transfer – pump set constant
pressure variable speed with all controls, motors, valves, etc., mounted on a
common concrete base. The system shall be capable of automatically providing
a flow rate range as indicated on the plans. System shall require only bolting in
place to housekeeping pad and installation of the shaft columns. The system
will include space and blind tee on both suction and discharge manifolds for
future addition of another pump. Pump construction shall be of the bronze fitted
type with cast-iron casing.

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B. Pump Description: centerifugal end suction pump

1. Motor: Ball Bearing squirrel cage end suction type

2. Casing: Cast Iron
3. Casing wear rings: Bronze
4. Impeller: Bronze end suction Type
5. Shaft: Stainless steel 416SS
6. Seal: Mechanical, Ni-resist and carbon faces
7. Bearings: Grease lubricated cartridge type

C. Each pump to have vibration-isolating mounts and be fitted with a separate

prewired temperature probe and approved electrical purge valve installed
immediately upstream of each pressure reducing valve.

D. Each pump shall be equipped with thermal safety valve which will open and
discharge water to drain when temperature exceeds 38°C. Contractor shall run
lines to drain. Sequence of Operation:

1. Manual or automatic alternation shall make it possible to switch working and

standby between pumps.
2. A low & height potable water cistern water level switch will automatically start
& stop pumps.
3. A low & height domestic water central water level suction will automatically
cut out the pumps.
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E. Power and Control Panel Furnish a single enclosure power and control panel
NEMA 1. Enclosure shall be steel and furnished with an industrial grade
enamel. It shall house all control components including:

- Circuit breaker disconnect switches through door with door interlock.

- Magnetic across-the-line starter with 3 phase overload protection
- Pump running lights
- H-O-A selector switches
- Automatic pump alternator with manual override selector switch,
reading adaptable to pumps alternation
- 220-volt control transformer
- Alarm indicating lights
- Audible alarm with silencing button, and remote trouble alarm
contacts
- Set of necessary control relays and other accessory devices required
to permit the system to operate in conformance with specification
- Mercoid adjustable deadband pressure switches
- Low suction level cut-out circuit to interface with suction tank controls

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All of the above to be factory internally prewired and tested in accordance with
the provisions of the National Electrical Code.

All control wires shall be individually numbered and each component shall be
labeled accordingly. All internal wiring shall be copper stranded, A.W.G. with a
minimum insulation of 90 degrees C. The complete assembly shall have a UL
listing mark for industrial control panels.

2.4 Sewage Ejectors (Submersible)

A. Duplex submersible wet.

1. Pump and motor to be easily removable from pit by means of an automatic

metal to metal faced discharge connection with sliding guide bracket and
guide bars. Provide sewage pumps designed for operation in water.
Provide two non-clog ball check valve capable of functioning in vertical or
horizontal position. Furnish and install a mix-flush valve mounted on the
pump liquid end to eliminate sludge and grease cake build up and
sedimentation in the pit.

2. Materials

a. Casing: Cast Iron Class 30

b. Impeller: Neva Clog, single vane, epoxy coated.
c. Shaft: Stainless Steel 316SS
d. Wearing Rings: Slotted type grit resistant

3. Motor

a. Air filled, dry type capable of running dry continuously.

b. Class F insulation to 155oC.
c. Minimum of sustaining ten starts per hour
d. Junction chamber with terminal board to be separated and leakproof.

4. Mechanical Seals: Tandum, double seal with tungsten carbide faces

running on an independent oil chamber.

5. Cable: Hypalon jacketed type SPC

B. Control Panel

1. Duplex control panel in NEMA I cabinet to include the following:

a. Circuit breaker type starters

b. HOA selector switches

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c. Running lights
d. Manual alternator
e. Alarm bell and reset with silencing button
f. Dry contacts for remote annunciation

C. Level Controls

1. Five Flygt type ENH-10 PVC mercury displacement level regulators with
cable.

D. Cover and Frame-Steel

1. Size as indicated on drawings

2. Steel type 13mm thick reinforced checkered plate designed for wheel traffic.
Can be pedestrian traffic if located in ex-store.

2.5 Sump Pumps

A. Submersible portable sump pump units shall be provided for surface waste
water sump pits.

B. Materials

1. Motor Housing: Cast iron.

2. Pump: Thermoplastic-fitted construction.
3. Impeller: Bronze.
4. Shaft: Stainless steel.

C. Accessories:

1. Pump: Close coupled design.

2. Power Cord: 6 meter fully sealed waterproof.
3. Float Switch: Submersible, integral with motor housing.

2.6 Hot Water Circulating Pumps

A. Furnish and install single suction centrifugal close-coupled in-line type for
mounting in hot water return lines to electric heater.

B. Materials

1. Motor Housing: Cast iron

2. Casing: Bronze, vertically split
3. Volute: Bronze
4. Impeller: Bronze, fully enclosed, key to shaft.

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5. Shaft: Stainless steel, type 316, ground smooth.

6. Seal: Mechanical, ceramic and carbon sealing faces.

C. Unit Features:

1. Noise: Dampening Coupler

2. Oil Lubrication System
3. Centrifugal Impeller

D. Starter: Combination fused magnetic starter with disconnect switch.

1. Thermostat - Electric control to have an adjustable range of 25°C. to 82°C.)

similar to Mercoid control No. 437: M&H Honeywell L400LA or other
approved equal.
2. Pump to be in-line type centrifugal, bronze body, Bell & Gossett or approved
equal.
3. Provide thermal overload circuit breaker mounted on motors, aqua stat and
disconnect switch.

2.7 Instrumentation and Controls:

1. On and Off delays factory set to system operating characteristics to prevent

short cycling of pumps.
2. Low suction pressure shutdown.
3. Alarm light, horn and reset button.
4. Automatic restart after alarm condition has returned to normal, with alarm
indicating light remaining lit until manually reset.
5. High system pressure indication and shutdown logic.
6. Low system pressure indication.
7. ASA Grade A pressure gauges 110mm for indication of system, suction and
each pump's discharge pressure

2.8 Factory Test and Certification

The factory shall certify in writing that the water pressure pump system and its
component parts have undergone a complete electric and hydraulic test prior to
shipment. The test shall include a system operating flow test from zero to 100%
design flow rate under the specified suction and net system pressure conditions
using each pump as lead and lag. The certification shall include copies of the
test data as recorded by X-Y Plotter. The system test may be witnessed by the
owner, architect, or Project Manager by reporting intent to do so to the factory.
System to be tested to 1380 kpa WWP.

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Certification shall include copies of the test data as recorded by MProcessor

Base System certifying the following:

1. Flow rate of each pump

2. Dynamic head
3. Starting torque
4. Revolutions per minute
5. KW
6. Pump efficiency
7. Main pump alternation by 24-hour time clock

2.9 Guarantee

The water pressure booster system shall be guaranteed in writing by the

manufacturer for a period of one year from date of issuance of certificate of
practical completion against defects in design, materials, or construction.

2.10 Start-Up Service

The service of a factory trained representative shall be made available on the job
site to check installation and start-up and instruct operating personnel.

2.11 Alarm Annunciation

A. Provide remote contacts for alarm connections to alarm panels provided by

another
trade.
B. All wiring to panel to be provided by Electrical Contractor.
C. Alarms shall be provided for the following:

1. Domestic booster system trouble.

2. Submersible Sewage and Waste Water Sump Pumps High Water Alarm &
Power Failure.

2.12 Shop Coatings

A. Steel and Iron Surfaces: Prime and paint.

B. Machined, Polished and Nonferrous Surfaces: Coat with rust preventive

compound.

PART 3 EXECUTION

3.1 Inspection

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Verify that structures, piping and equipment are compatible.

3.2 Adjustments

A. Pump Operation

B. Control Operation

C. Alarm Operation

D. Alignment

3.3 Installation

A. Completely align and level pumps, motors and bases. Where pumps and
motors are shipped as a unit, realign them in the field.

B. Grout base plates completed to provided to rigid non-deflecting support.

C. Secure pumps to bases with proper size anchor bolts

D. Install and align mechanical seals in accordance with the manufacturer's

recommendations.

E. Construct all apparatus of materials and pressure ratings suitable for the
conditions encountered during continuous operation.

F. Provide casing connections for vent, drain, suction and discharge pressure
gauges.

G. Balance impellers and all other moving components statically and dynamically.

H. Match centrifugal pump impellers and casings so that at specified operating

conditions, the impeller diameter is not more then 90% of the maximum
diameter impeller which can satisfactorily operate in the casing.

END OF SECTION 15454

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