General Construction Specifications
PART 1 - GENERAL
01 WORK INCLUDED
A. Extent of HVAC pumps required by this section is indicated on drawings and schedules, and by the requirements of this Section.
B. Types of pumps specified in this section include the following:
1. In-Line Circulator
2. Frame-Mounted End Suction
C. Pumps furnished as part of factory-fabricated equipment, are specified as part of the assembly in other Division-15 sections.
02 ACCEPTABLE MANUFACTURERS (STANDARDS)
A. Aurora Pump - A General Signal Co.
B. Peerless Pump
C. Bell & Gossett
D. Armstrong
E. Specifically named others under each respective type.
1.02 COMPATIBILITY OF COMPONENTS
A. The pump manufacturer shall furnish and be responsible for the selection, compatibility and performance of each assembly consisting of pump, motor, coupling and baseplate.
1.03 CODES AND STANDARDS
A. HI Compliance: Design, manufacture, and install HVAC pumps in accordance with HI "Hydraulic Institute Standards".
B. UL Compliance: Design, manufacture, and install HVAC pumps in accordance with UL 778 "Motor Operated Water Pumps".
C. UL and NEMA Compliance: Provide electric motors and components which are listed and labeled by Underwriters' Laboratories and comply with NEMA standards.
D. ANSI Compliance: Comply with applicable paragraphs of ANSI B58.1, except as specified herein.
E. Certification, Pump Performance: Provide pumps whose performances, under specified operating conditions, are certified by manufacturer.
1.04 SUBMITTALS
A. Product Data: Submit manufacturer's pump specifications, installation and start-up instructions, and current accurate pump characteristic performance curves with selection points clearly indicated.
1.05 PRODUCT DELIVERY, STORAGE AND HANDLING
A. Store HVAC pumps and components in clean dry place. Protect from weather, dirt, fumes, water, construction debris, and physical damage.
PART 2 - PRODUCTS
03 GENERAL REQUIREMENTS
A. Statically and dynamically balance rotating parts.
B. Construction to permit complete servicing without breaking piping connections.
C. Pumps to rotate at 1750 rpm unless specified otherwise.
D. Pump connections to be flanged or grooved joint/mechanical coupling.
E. Heating pumps to be suitable for handling water at 230 degrees F.
F. Pumps to be of bronze fitted construction with bronze impeller and carbon steel shafts. Shaft deflection not to exceed 0.002" at sealing faces at maximum load.
G. Hydrostatic test pump casings at one and one-half times the design working pressure.
H. Impeller diameter not to exceed 90% of the maximum diameter which the casing will hold.
I. Provide pump and motor with stainless steel nameplate securely fastened to casings. Nameplates to provide all data necessary for identification and replacement.
04 IN-LINE CIRCULATOR PUMPS
A. General: Provide in-line circulator pumps where indicated, and of capacities as scheduled.
B. Type: Horizontal mount, vertical split case, oil-lubricated, designed for 125 psi working pressure, and 225 degrees F continuous water temperature.
C. Body: Cast iron bronze-fitted, with suction and discharge gauge tappings.
D. Shaft: Hardened alloy steel.
E. Bearings: Oil-lubricated bronze journal bearings.
F. Seal: Mechanical, with carbon seal ring and ceramic seat.
G. Motor: Non-overloading at any point on pump curve, open, drip-proof, oil-lubricated journal bearings, resilient mounted construction, built-in thermal overload protection on single phase motors.
H. Coupling: Self-aligning, flexible coupling.
I. Impeller: Enclosed type, hydraulically and dynamically balanced, and keyed to shaft.
05 FRAME-MOUNTED END SUCTION PUMPS
A. General: Provide frame-mounted end suction pumps where indicated, and of capacities and having characteristics as scheduled.
B. Type: Horizontal mount, single stage, vertical split case, flexible coupling, base mounted, designed for 175 psi working pressure.
C. Casing: Cast iron bronze-fitted, 125 psi ANSI flanges, tappings for gauge and drain connections.
D. Shaft: Steel with replaceable shaft sleeve.
E. Bearings: Regreasable ball bearings.
F. Seal: Mechanical, with carbon seal ring and ceramic seat.
G. Motor: Open, drip-proof, regreasable ball bearings.
H. Impeller: Enclosed type, hydraulically and dynamically balanced, keyed to shaft and secured with locking screw.
I. Baseplate: Structural steel with welded cross members, and open grouting area.
J. Coupling: Flexible, capable of absorbing torsional vibration, equipped with coupling guard.
06 NAMEPLATES
A. Each pump, motor, and pump/motor assembly shall be provided with a stainless steel nameplate securely fastened to their casing. These nameplates shall provide all data necessary for equipment, identification and replacement.
PART 3 - EXECUTION
07 INSPECTION
A. General: Examine areas and conditions under which HVAC pumps are to be installed. Do not proceed with work until unsatisfactory conditions have been corrected in manner acceptable to Installer.
08 INSTALLATION OF PUMPS
A. General: Install HVAC pumps where indicated, in accordance with manufacturer's published installation instructions, complying with recognized industry practices to ensure that HVAC pumps comply with requirements and serve intended purposes.
B. Access: Provide access space around HVAC pumps for service as indicated, but in no case less than that recommended by manufacturer.
C. All end-suction (frame-mounted) and double-suction pumps shall be furnished and/or installed with soleplates, bedplates, or baseplates which shall be carefully leveled, grouted, and bolted in place. Grout shall be of the expanding type which contains catalyzed metallic aggregate. After grout has set, it shall be cut flush with the bedplate and sealed to prevent fraying deterioration at the edges.
D. Support: Install base-mounted pumps on minimum of 4" high concrete base equal or greater than 3 times total weight of pump and motor, with anchor bolts poured in place. Set and level pump, grout under pump base with non-shrink grout.
E. Support: Refer to Division-15 section "Vibration Control" for support and mounting requirements of HVAC pumps.
F. Install in-line pumps, supported from piping system. Provide pipe supports on each side of vertical in-line pumps to prevent undue strain on the piping system.
G. Electrical Wiring: Install electrical devices furnished by manufacturer but not specified to be factory-mounted. Furnish copy of manufacturer's wiring diagram submittal to Electrical Installer. Verify that electrical wiring installation is in accordance with manufacturer's submittal and installation requirements of Division-16 sections. Do not proceed with start-up until wiring installation is acceptable to installer. Ensure that pump motors are wired properly, with rotation in correct direction, and that pump and motor grounding has been provided.
H. Piping Connections: Refer to Division-15 HVAC piping sections. Provide piping, valves, accessories, gauges, supports, and flexible connections as indicated or described below. Provide gauge ports at suction and discharge connections to pumps. Provide air vent cock in high point of casing. Provide line sized butterfly valve and strainer on suction side piping, and triple duty valve (or equivalent butterfly, check and balance valve) on discharge piping for each pump unless otherwise indicated on drawings.
I. Alignment: A hot alignment check shall be made on all couplings between motors and end-suction frame mounted and double-suction pumps. All shall be operated until all components have reached operating temperature before the hot check is made. Any and all must be repositioned as required and hot alignment checks repeated until both parallel and angular alignments in both plan and elevation are within limits set by the manufacturer.
J. Start-Up: Lubricate pumps before start-up. Start-up in accordance with manufacturer's instructions.
K. Refer to Division-15 section "HVAC Test-Adjust-Balance" for pump system balancing; not work of this section.
L. Cleaning: Clean factory-finished surfaces. Repair any marred or scratched surfaces with manufacturer's touch-up paint.
END OF SECTION
