221123 - Domestic Water Pumps.pdf

09-01-15

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SECTION 22 11 23

DOMESTIC WATER PUMPS

PART 1 - GENERAL

1.1 DESCRIPTION

A. Hot water circulating pump, hot water recirculation pump and domestic water pressure booster system.

B. A complete listing of all acronyms and abbreviations are included in

Section 22 05 11, COMMON WORK RESULTS FOR PLUMBING.

1.2 RELATED WORK

A. Section 22 05 23, General Duty Valves for Plumbing Piping.

B. Section 22 35 00, Domestic Water Heat Exchangers.

1.3 APPLICABLE PUBLICATIONS

A. The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the text by the basic designation only.

B. American Society of Mechanical Engineers (ASME):

ASME Boiler and Pressure Code -

BPVC Section VIII-1-2015 Rules for Construction of Pressure

Vessels, Division 1

BPVC Section VIII-2-2015 Rules for Construction of Pressure

Vessels, Division 2-Alternative Rules

C. American Society for Testing and Materials (ASTM):

A48/A48M-2003 (R2012)...Standard Specification for Gray Iron Castings

B584-2014...............Standard Specification for Copper Alloy Sand

Castings for General Applications

D. International Code Council (ICC)

IPC-2012................International Plumbing Code

E. National Electrical Manufacturers Association (NEMA):

ICS 6-1993 (R2001, R2006) Industrial Control and Systems:

Enclosures

250-2014................Enclosures for Electrical Equipment (1000 Volts

Maximum)

F. NSF International (NSF)

61-2014a................Drinking Water System Components – Health

Effects

372-2011................Drinking Water System Components – Lead Content

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G. Underwriters' Laboratories, Inc. (UL):

508-1999 (R2013)........Standards for Industrial Control Equipment

778-2010 (R2014)........Standard for Motor-Operated Water Pumps

1.4 SUBMITTALS

A. Manufacturer's Literature and Data including: Full item description and optional features and accessories. Include dimensions, weights, materials, applications, standard compliance, model numbers, size, and capacity.

1. Pump:

a. Manufacturer and model.

b. Operating speed.

c. Capacity.

d. Characteristic performance curves.

2. Motor:

a. Manufacturer, frame and type.

b. Speed.

c. Current Characteristics.

d. Efficiency.

D. Complete operating and maintenance manuals including wiring diagrams, technical data sheets, information for ordering replacement parts, and troubleshooting guide:

1. Include complete list indicating all components of the systems.

2. Include complete diagrams of the internal wiring for each item of equipment.

3. Diagrams shall have their terminals identified to facilitate installation, operation and maintenance.

1.5 QUALITY ASSURANCE

A. General:

1. UL Compliance: Comply with UL 778 for motor-operated water pumps.

2. Design Criteria:

a. Pump sizes, capacities, pressures, operating characteristics and efficiency shall be as scheduled.

b. Head-capacity curves shall slope up to maximum head at shut-off.

Select pumps near the midrange of the curve, and near the point of maximum efficiency, without approaching the pump curve end point and possible cavitation and unstable operation.

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c. Pump Driver: Furnish with pump. Size shall be non-overloading at any point on the head-capacity curve, including in a parallel or series pumping installation with one pump in operation.

d. Provide all pumps with motors, impellers, drive assemblies, bearings, coupling guard and other accessories specified.

Statically and dynamically balance all rotating parts.

e. Furnish each pump and motor with a nameplate giving the manufacturers name, serial number of pump, capacity in GPM and head in feet at design condition, horsepower, voltage, frequency, speed and full load current and motor efficiency.

f. Test all pumps before shipment. The manufacturer shall certify all pump ratings.

g. After completion of balancing, provide replacement of impellers or trim impellers to provide specified flow at actual pumping head, as installed.

1.6 AS-BUILT DOCUMENTATION

A. Submit manufacturer’s literature and data.

PART 2 - PRODUCTS

2.1 MATERIALS

A. Material or equipment containing a weighted average of greater than

0.25 percent lead shall be prohibited in any potable water system intended for human consumption, and shall be certified in accordance with NSF 61 or NSF 372.

2.2 HOT WATER RECIRCULATING PUMP

A. General:

1. Centrifugal, single stage, pump. Driver shall be electric motor, close coupled or connected by flexible or magnetic coupling. Pump for hot water system shall be designed for quiet, trouble-free operation at a minimum of 180 degrees F water service and 150 psig.

2. Mounting shall be in-line, vertical or horizontal as indicated

//below// //on drawing schedules//.

3. Stamped or engraved stainless steel nameplate.

4. Motors: Maximum 40 degrees C (104 degrees F) ambient temperature rise, drip-proof, for operation with current, voltage, phase and cycle shown in schedule on Electrical drawings, conforming to NEMA

Type 4. Motors shall be equipped with thermal overload protection.

When motor has cooled down it shall re-start automatically if the

22 11 23 - 4 operating control has been left on and the system requires pump to start.

5. Pump shall operate continuously with on-off switch, or with an HOA switch for automatically controlled pumps, for manual shut down. In the inlet and outlet piping of the pump, shutoff valves shall be installed to permit service to the pump, strainer, and check valve without draining the system.

6. A check valve shall be installed in the pump discharge piping immediately downstream of the pump. A strainer with drain valve and removable strainer screen or basket shall be installed immediately upstream of the pump. Flexible pipe connectors shall be installed to prevent pump vibration from being transferred to adjacent piping and the building structure.

B. Horizontal, In-Line Pump:

1. Flexibly-coupled pump and motor with maximum 1,800 rpm rotational speed.

2. Bronze-fitted cast iron body construction with solid steel shaft, and flanged connections. Refer to schedule on drawing for performance and model number.

3. Bearings: Permanently oil lubricated and sealed, stainless steel ball bearings.

4. Impeller shall be high grade, cast brass or bronze, accurately machined and properly balanced.

5. Seal: Mechanical, with carbon-steel rotating ring, stainless steel spring, ceramic seat, and rubber bellows and gasket. Include water slinger on shaft between motor and seal.

2.3 HOT WATER CIRCULATING PUMP

A. Not used.

2.4 DOMESTIC WATER PRESSURE BOOSTER SYSTEM

A. Not used.

PART 3 - EXECUTION

3.1 STARTUP AND TESTING

A. Make tests as recommended by product manufacturer and listed standards and under actual or simulated operating conditions and prove full compliance with design and specified requirements. Tests of the various items of equipment shall be performed simultaneously with the system of which each item is an integral part.

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B. System Test: After installation is completed provide an operational test of the completed system including flow rates, pressure compliance, alarms and all control functions.

C. When any defects are detected, correct defects and repeat test at no additional cost or time to the Government.

3.2 COMMISSIONING

A. Not used.

3.3 DEMONSTRATION AND TRAINING

A. Not used.

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