Pumping System & other Hydronics (HVAC)

Pumping System & other Hydronics (HVAC)

The centrifugal pump has long been the workhorse of HVAC systems, supporting the operation of chillers, boilers, cooling towers, domestic water systems, and hydronic distribution systems. And while practically every other component in an HVAC system has been greatly modified to meet ever changing requirements for efficiency and reliability, centrifugal pumps have not changed very much.

That does not mean today’s centrifugal pumps are the same as those of 20 years ago. Manufacturers have made significant improvements in impeller designs, construction materials, bearing and seal designs, and couplings. But these changes have been more evolutionary than revolutionary.

As a result, many managers simply overlook the pump as an opportunity to improve the performance and reliability of HVAC systems. Building designers replicate designs used in the past in new building designs or renovation plans. System operating practices simply follow past tried and true practices. And when pumps fail, technicians replace them with new ones with the same characteristics.

The situation is changing today. Many advances that have affected other areas of building HVAC operation are being applied to pumps and their operation. As a result, engineering and maintenance managers can achieve levels of operating efficiency that were unheard of as recently as 10 years ago. And while improved operating efficiency is a primary benefits of today’s pump installations, it is not the only one. System performance has improved. Reliability has increased. Maintenance requirements have been reduced.

Improving Pump Efficiency

Enter the Intelligent Controller

Don’t Overlook Maintenance

The overall efficiency of any pump used in a building HVAC system is determined by a number of factors, including:
	The efficiency of the pump and motor
	The efficiency of the pump control
	How well technicians maintain the pump and its related components.

While VFDs can greatly improve the energy efficiency and control effectiveness of pumping systems, manufacturers have developed a new generation of controls that goes even further. This new generation of pump controls intelligent pump controllers offers improvements in pump reliability while further improving system performance

No matter how advanced the control system or how good the design, pump systems will operate effectively and efficiently only if managers schedule maintenance properly. Too often, though, they ignore maintenance until something goes wrong.

VSX Pumps

At Bell & Gossett, we have over 88 years of experience in designing pumps. New VSX Double-Suction Split-Case Pump has Maintenance-Free Bearings, new One-Piece Unitized Seal, Groutless Base Plate, Alignment-Friendly Coupling, reduced pump room footprint by up to 40% when compared to traditional split-case and vertical inline pumps.

Using CFD technology, we can deliver identical performance in any flange configuration. The result is that you can maximize your piping possibilities and meet a broad hydraulic range for chillers, towers, distributive and general pumping requirements.

Features and Benefits

	Hydraulic coverage to meet all your design requirements
	Volute & Cover Plates: Cast iron ASTM A159 (35,000 psi)*
	Impeller: Low Zinc Silicon Bronze ASTM 876
	Shaft: 416 Stainless Steel
	Sleeve: 304 Stainless Steel

Series 1510 Base mounted end suction pump

Base-mounted, end-suction Series 1510 pumps are available in 1-1/4” through 8” sizes, 1/2 HP to 150 HP at 1750 RPM and 2 HP through 150 HP at 3500 RPM. Bronze-fitted and all iron material configurations are available with flows to 4000 GPM, heads to 500 feet.

i-ALERT condition monitor measures vibration and temperature at the outboard bearing and automatically indicates when pre-set levels of vibration and temperature have been exceeded, so that changes can be made before failure occurs.

Integrally cast volute foot and center drop-out spacer coupling combine to offer true back pullout capability, providing low-cost ease of maintenance. An ANSI-OSHA-compliant coupling guard shields the flexible coupler. A welded steel base plate and internally flushed mechanical seal are standard features on this pump.

TECH 502 CONTROLLER

Variable Speed Pumping Systems – Technologic 502 Series (1-4 pump systems, up to 4 zones)The new Bell & Gossett Technologic® 502 pump controller and variable speed drive saves energy.

APPLICATIONS:

Commercial HVAC and pressure boosting applications.

	Local and Remote Selection
	Motor Overload Protection
	Diagnostic Display
	Manual & Automatic Pump Alternation
	Auto Start of Lag Pump upon Lead Pump Failure (for multi-pump systems)
	4 Discrete Analog Inputs for Zone Sensors, Flow Sensor, or Suction Sensor
	End of Curve Protection
	High System Cutout
	No Flow Shutdown
	Serial Communication Compliant
	100 kA Short Circuit Current Rating (SCCR)

Technologisc - 5500 Controller

The Technologic 5500 pump controller is designed to provide optimum performance, reliability and energy savings. Receiving sensor inputs, staging pumps, controlling AFD speed and monitoring the motor performance to meet system demands are the overall functions of the pump controller.

The Technologic 5500 Controller combines PID functions, setpoint modification, and system and component status into a single, central, user-friendly unit.

A data-logging feature provides historical information of key events with date and time stamps. Log information includes alarms, pump run timers and pump cycle counters. The signal log displays the minimum, maximum and current values of the process variable and flow. It is also capable of displaying kilowatt-hours.

The Technologic 5500’s flash memory permits customized settings to be loaded and saved. These field values are permanently retained even after corruption of data due to external disturbances.

The Technologic 5500’s modular design adds unlimited flexibility as it incorporates years of ITT Bell & Gossett engineering development and programming into a state of the art control system designed exclusively for pump applications.

APPLICATIONS:
Commercial HVAC and pressure boosting applications

Constant Speed Pumping System

Primary & Secondary Pumping System Variable Speed Variable Volume Secondary Pumping

Primary Secondary Tertiary Pumping System

SPECIALIZED AREAS

	Pumping System & other Hydronics (HVAC)
	Pumping System (Plumbing & Fire Fighting)
	Water & Waste Water Treatment
	Dynamic Balancing cum Control Valves
	Fans & Ventilation Products
	Thermal Energy Storage
	Grooved Pipe Joining systems
	Air Distribution System
	Air Purification System
	Cooling Tower

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