15626-1
SECTION 15626
HVAC SYSTEM PUMPS (IN-LINE CIRCULATORS)
PART 1 - GENERAL
1.1 DESCRIPTION
A. Work Included: Provide and install horizontal inline centrifugal single stage pumps
with the capacities and characteristics as shown on the equipment schedules.
B. Related Work Specified Elsewhere: "HVAC - General" is specified in this Division.
12 QUALITY ASSURANCE
A. Verification of Unit Output: Equipment shall be supplied with manufacturer's
certificate and pump curve for rated performance, horsepower, etc.
B. Acceptable Manufacturers:
1. Grundfos
2. Taco
3. Aurora
4. __ Bell and Gossett Company
PART 2 - PRODUCTS
2.1 MATERIALS
A. All pump casings shall be centerline discharge of cast iron designed for line mounting.
All pumps are to be provided with companion flanges. Units shall have a maximum
operating pressure of 175psig at a maximum operating temperature of 300° F.
B. Pumps shall have a cast bronze impeller and shall be dynamically balanced. Suction
and discharge flanges shall be provided with drilled and tapped gauge ports.
Pump shall be canned-rotor type, the pump and motor form an integral unit without
shaft seal and with only two gaskets for sealing. The bearings are lubricated by the
pumped liquid.
Controller shall be integrated in the control box.
Pump shall contain built-in differential-pressure and temperature sensor.
Rotor can shall be made of carbon-fiber-reinforced composite.
Stainless-steel bearing plate and rotor cladding.
Aluminium alloy stator housing.
Air-cooled power electronics.
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PART 3 - EXECUTION
3.1 INSTALLATION
A. Install using manufacturer's recommendations and as shown on the Drawings.
B. Install so no vibration is transmitted to piping system. Provide independent support
and flexible connections as required to eliminate pipeline vibration.
C. Fully lubricate pump in accordance with manufacturer's recommendations prior to
start-up.
13089K
