SECTION 15540

HVAC PUMPS

PART 1 GENERAL

WORK INCLUDED

In-line circulators.

Vertical in-line pumps.

Close coupled pumps.

Base mounted pumps.

Dual drive pumping system.

Side-stream filters.

RELATED WORK

Section 15170 - Motors.

Section 15242 - Vibration Isolation.

Section 15260 - Piping Insulation.

Section 15280 - Equipment Insulation.

Section 15510 - Hydronic Piping.

Section 15515 - Hydronic Specialties.

REFERENCES

ANSI/UL 778 - Motor Operated Water Pumps.

QUALITY ASSURANCE

Manufacturer: Company specializing in manufacture, assembly, and field performance of pumps with minimum [three] [_____] years experience.

Alignment: Base mounted pumps shall be aligned by qualified millwright and alignment certified.

SUBMITTALS

Submit [shop drawings and] product data under provisions of Section [01300.] [01340.]

Submit certified pump curves showing performance characteristics with pump and system operating point plotted. Include NPSH curve when applicable.

Submit manufacturer's installation instructions under provisions of Section [01300.] [01340.]

OPERATION AND MAINTENANCE DATA

Submit operation and maintenance data under provisions of Section [01700.] [01730.]

Include installation instructions, assembly views, lubrication instructions, and replacement parts list.

DELIVERY, STORAGE, AND HANDLING

Deliver products to site under provisions of Section [01600.] [01610.]

Store and protect products under provisions of Section [01600.] [01620.]

EXTRA PARTS

Provide one extra set of mechanical seals for pumps under provisions of Section [01700.] [01750.]

PART 2 PRODUCTS

ACCEPTABLE MANUFACTURERS

[___________________________________________.]

[___________________________________________.]

[___________________________________________.]

Substitutions: Under provisions of section [01600.] [01630.]

GENERAL CONSTRUCTION REQUIREMENTS

Balance: Rotating parts, statically and dynamically.

Construction: To permit servicing without breaking piping or motor connections.

Pump Motors: Operate at 1750 rpm unless specified otherwise. Refer to Section 15170.

Pump Connections: Flanged.

IN-LINE CIRCULATORS

Type: Horizontal shaft, single stage, direct connected, with resiliently mounted motor for in-line mounting, oil lubricated, for [125 psig (860 kPa)] [175 psig (1 200 kPa)] maximum working pressure.

Casing: Cast iron.

Impeller: [Cadmium plated steel,] [Brass or bronze,] keyed to shaft.

Bearings: Two, oil lubricated bronze sleeves.

Shaft: [Alloy] [Stainless] steel with [copper] [stainless steel] sleeve, integral thrust collar.

Seal: Carbon rotating against a stationary ceramic seat[,][.] [viton fitted,] [225 degrees F (107 degrees C)] [275 degrees F (135 degrees C)] maximum continuous operating temperature.

Drive: Flexible coupling.

Performance: [_____] gal/min ([_____] L/sec) flow capacity, [_____] feet ([_____] kPa) head, [_____] hp motor; Model [__________] manufactured by [_______________.]

VERTICAL IN-LINE PUMPS

Type: Vertical, single stage, close coupled, radially [or horizontally] split casing, for in-line mounting, for [175 psig (1 200 kPa)] [250 psig (1 720 kPa)] [300 psig (2 060 kPa)] working pressure.

Casing: [Cast iron,] [Cast steel,] with suction and discharge gage port, casing wear ring, seal flush connection, drain plug, flanged suction and discharge.

Impeller: Bronze, fully enclosed, keyed directly to motor shaft or extension.

Shaft: [Stainless steel.] [Carbon steel with bronze sleeve.]

Seal: Carbon rotating against a stationary ceramic seat[,][.] [viton fitted,] [225 degrees F (107 degrees C)] [275 degrees F (135 degrees C)] maximum continuous operating temperature.

****** [OR] ******

Seal: Packing gland with minimum four rings graphite impregnated packing and bronze lantern rings, 230 degrees F (110 degrees C) maximum continuous operating temperature.

Performance: [_____] gal/min ([_____] L/sec) flow capacity, [_____] feet ([_____] kPa) head, [_____] hp motor; Model [________] manufactured by [________________________.]

CLOSE COUPLED PUMPS

Type: Horizontal shaft, single stage, close coupled, radially split casing, for [125 psig (860 kPa)] [175 psig (1 200 kPa)] [250 psig (1 720 kPa)] maximum working pressure.

Casing: Cast iron, with suction and discharge gage ports, renewable bronze casing wearing rings, seal flush connection, drain plug, flanged suction and discharge.

Impeller: Bronze, fully enclosed, keyed to motor shaft extension.

Shaft: Stainless steel.

Seal: Carbon rotating against a stationary ceramic seat[,][.] [viton fitted,] [225 degrees F (107 degrees C)] [275 degrees F (135 degrees C)] maximum continuous operating temperature.

****** [OR] ******

Seal: Packing gland with minimum four rings graphite impregnated packing and bronze lantern rings, 230 degrees F (110 degrees C) maximum continuous operating temperature.

Performance: [_____] gal/min ([_____] L/sec) flow capacity, [_____] feet ([_____] kPa) head, [_____] hp motor; Model [______________] manufactured by [________________.]

BASE MOUNTED PUMPS

Type: Horizontal shaft, single stage, direct connected, radially [or horizontally] split casing, for [125 psig (860 kPa)] [175 psig (1 200 kPa)] [250 psig (1 720 kPa)] maximum working pressure.

Casing: Cast iron, with suction and discharge gage ports, renewable bronze casing wearing rings, seal flush connection, drain plug, flanged suction and discharge.

Impeller: Bronze, fully enclosed, keyed to shaft.

Bearings: [Oil] [Grease] [Permanently] lubricated roller or ball bearings.

Shaft: Alloy steel with copper, bronze, or stainless steel shaft sleeve.

Seal: Carbon rotating against a stationary ceramic seat[,][.] [viton fitted,] [225 degrees F (107 degrees C)] [275 degrees F (135 degrees C)] maximum continuous operating temperature.

****** [OR] ******

Seal: Packing gland with minimum four rings graphite impregnated packing and bronze lantern rings, 230 degrees F (110 degrees C) maximum continuous operating temperature.

Drive: Flexible coupling with coupling guard.

Baseplate: Cast iron or fabricated steel with integral drain rim.

Performance: [_____] gal/min ([_____] L/sec) flow capacity, [_____] feet ([_____] kPa) head, [_____] hp motor; Model [________] manufactured by [______________.]

DUAL DRIVE PUMPING SYSTEM

Pumping System: Horizontal split case, base mounted pump with two motors, operating at 1750 rpm and 1150 rpm, assembled on integral base with control cabinet.

Control Cabinet: NEMA 1, UL approved enclosure with individual circuit breakers, magnetic starters with overload protection, running lights, separate 115V fused control circuit, hand-off-automatic switches, [motor failure alarm with manual reset,] pre-wired.

SIDE-STREAM FILTRATION SYSTEM

System: Flow indicator, filter housing with cartridge filter, shut-off valves, and flow control valve.

Design Flow: 4 gal/min (0.25 L/sec) with maximum pressure drop of 3 psig (20.7 kPa).

Hot Water [and Glycol] Filter Housing: Glass reinforced nylon plastic suitable for 220 degrees F (105 degrees C) and 200 psig (1 380 kPa) operating conditions.

Chilled Water Filter Housing: Reinforced polypropylene plastic housing suitable for 125 degrees F (52 degrees C) and 125 psig (860 kPa) operating conditions.

Cartridge: 30 micron (0.03 mm) for initial cleaning and 5 micron (0.005 mm) for final system cleaning.

PART 3 EXECUTION

INSTALLATION

Install pumps in accordance with manufacturer's instructions.

Provide access space around pumps for service. Provide no less than minimum as recommended by manufacturer.

Ensure pumps operate at specified system fluid temperatures without vapor binding and cavitation, are non-overloading in parallel or individual operation, and operate within 25 percent of midpoint of published maximum efficiency curve.

Decrease from line size with long radius reducing elbows or reducers. Support piping adjacent to pump such that no weight is carried on pump casings. For close coupled or base mounted pumps, provide supports under elbows on pump suction and discharge line sizes 4 inches (102 mm) and over. [Refer to Section 15242.]

Provide line sized shut-off valve and [strainer] [_______] on pump suction, and line sized [soft seat check valve and balancing valve] [combination pump discharge valve] on pump discharge.

Provide air cock and drain connection on horizontal pump casings.

Provide drains for bases and seals, piped to and discharging into floor drains.

Lubricate pumps before start-up.

Install [close coupled and] base mounted pumps on concrete base, with anchor bolts, set and level, and grout in place.

Qualified millwright shall check, align, and certify base mounted pumps prior to start-up.

Provide side-stream filtration system for [heating water][,] [chilled water][,] [glycol][,] [brine] systems. Install across pump with flow from pump discharge to pump suction from pump tappings.

PUMP SCHEDULE

Drawing_Code	P-1	P-2	P-3	P-4

Manufacturer

Model No.

Location

Service

Capacity

Head

Minimum Efficiency

Motor Size

Seal Type

END OF SECTION