[SUBMITTAL INFORMATION]

DESIGN A/E NOTE - GUIDE SPECIFICATION CONVENTIONS

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SECTION 232223

HVAC PUMPS

(Edited from DeCA June 2017 Design Criteria)

PART 1 - GENERAL

1.1  SUMMARY

  1. Section Includes:
  2. Vertical in-line pumps.

2.  Base-mounted pumps.

  1. Glycol makeup pump.
  2. Sidestream filters.
  3. Related Sections:
  4. Division 01 Section Mechanical, Refrigeration, Food Service Equipment and Electrical Coordination.
  5. Division 01 Section Quality Control.
  6. Division 01 Section Closeout Procedures.

4.  Division 03 Cast-in-Place Concrete.

  1. Division 23 Section Common Motor Requirements for HVAC.
  2. Division 23 Section HVAC Piping Insulation.
  3. Division 23 Section Hydronic Piping.
  4. Division 23 Section Hydronic Piping Specialties.

1.2  QUALITY CONTROL

  1. The following publications form a part of this Specification to the extent they are applicable:
  2. Division 01 Section Quality Control.
  3. UL 778 - Motor Operated Water Pumps.
  4. NFPA 70 - National Electrical Code.

1.3  PERFORMANCE REQUIREMENTS

  1. Ensure pumps operate pumping specified fluids 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.

1.4  SUBMITTALS

  1. Submit under provisions of Division 01 Section Administrative Requirements.
  2. Product Data: Provide pump curves showing performance characteristics with pump and system operating point plotted applicable. Include electrical characteristics and connection requirements.
  3. Manufacturer's Installation Instructions: Indicate hanging and support requirements and recommendations.
  4. Operation and Maintenance data.

1.5  OPERATION AND MAINTENANCE DATA

  1. Operation and Maintenance Data: Include installation instructions, assembly views, lubrication instructions, and replacement parts list.
  2. The Contractor shall submit all certifications and testing data as a supplement to previously submitted O & M manuals at contract closeout.

1.6  QUALIFICATIONS

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

1.7  REGULATORY REQUIREMENTS

  1. Listed and classified by UL as suitable for the purpose specified and indicated.

1.8  EXTRA MATERIALS

  1. Provide one set of mechanical seals for each type of pump furnished.
  2. Provide 2 sets of cartridges for each side-stream filter.

PART 2 - PRODUCTS

2.1  VERTICAL IN-LINE PUMPS

  1. Type: Vertical, single stage, close coupled, radially or horizontally split casing, for inline mounting, for 175 psig working pressure.
  2. Casing: Cast iron, with suction and discharge gage port, casing wear ring, seal flush connection, drain plug, flanged suction and discharge.
  3. Impeller: Bronze, fully enclosed, keyed directly to motor shaft or extension, trim impeller to match specified performance.
  4. Shaft: Carbon steel with stainless steel impeller cap screw or nut and bronze sleeve.
  5. Seal: Carbon rotating against a stationary ceramic seat, 250 deg F maximum continuous operating temperature.

2.2  BASE-MOUNTED PUMPS

A.  Type: Horizontal shaft, single stage, direct connected, radially or horizontally split casing, for 125 psi (860 kPa) maximum working pressure.

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

C.  Impeller: Bronze, fully enclosed, keyed to shaft.

D.  Bearings: oil lubricated roller or ball bearings.

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

F.  Seal: Mechanical seal, 225 degrees F (107 degrees C) maximum continuous operating temperature.

G.  Seal: Packing gland with minimum four rings graphite impregnated packing and bronze lantern rings, 250 degrees F (1221 degrees C) maximum continuous operating temperature.

H.  Drive: Flexible coupling with coupling guard.

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

J.  Electrical Characteristics:

1.  Motor: 1750 rpm unless specified otherwise.

2.  Wiring Terminations: Provide terminal lugs to match ranch circuit conductor quantities, sizes, and materials indicated. Enclose terminal lugs in terminal box sized to NFPA 70.

2.3  GLYCOL MAKEUP PUMP

  1. Anti-syphon combination fill and make-up pump package.
  2. Pump package shall be completely factory assembled, piped, wired and tested, including a close-coupled bronze-fitted 1750 or 3500 rpm centrifugal pump, tank and control panel factory assembled on a structural steel base.
  3. Each pump package shall be equipped with:
  4. Tank mounted control panel containing a TT switch or magnetic starter (overload relays on all 3 legs).
  5. "On-Off-Auto" switch.
  6. Momentary contact "test" button.
  7. Pressure gauge indicating pump discharge pressure.
  8. Gauge glass.
  9. 3/4 inch drain tapping.

2.4  SIDESTREAM FILTRATION SYSTEM

  1. System: Flow indicator, filter housing with cartridge filter, shut-off valves, and flow control valve.
  2. Performance: Design flow 4 gal/min with maximum pressure drop of 3 psig.
  3. Hot Water Filter Housing: Glass reinforced nylon plastic suitable for 220 deg F and 200 psig operating conditions.
  4. Cartridges: 30 micron for start-up and 5 micron for system operation.

PART 3 - EXECUTION

3.1  PREPARATION

  1. Verify that electric power is available and of the correct characteristics.

3.2  INSTALLATION

  1. Install in accordance with manufacturer's instructions.
  2. Provide access space around pumps for service. Provide no less than minimum as recommended by manufacturer.
  3. 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.
  4. Provide line sized shut-off valve and strainer on pump suction, and line sized soft seat check valve and balancing valve on pump discharge.
  5. Provide air cock and drain connection on horizontal pump casings and gauge tapping on suction and discharge flanges.
  6. Lubricate pumps before start-up.
  7. Provide side-stream filtration system for heating water system. Install across pump with flow from pump discharge to pump suction from pump gauge tappings.

H.  Install base-mounted pumps on concrete housekeeping base, with anchor bolts, set and level, and grout in place. Refer to Section 03 30 00 Cast-in-Place Concrete.

END OF SECTION

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HVAC PUMPS

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