Members of The NEWS’ trainer panel examined compressor valves and determined the best methods for maintaining valves, diagnosing faulty ones, and implementing proper troubleshooting techniques when they go bad.
The NEWS recently sat down with Mark Handzel, vice president, product regulatory affairs, and director, HVAC commercial buildings, Xylem, to discuss the state of the pump industry and what prospective employees should know before they enter the industry.
The Model 700 industrial vertical non-clog waste ejector pump is used for service in industrial wastes, sanitary wastes, process wastes, and rendering wastes. It is designed for long life in tough services with heads to 100 feet total dynamic head (TDH) and flows to 1,500 gallons per minute (gpm).
This recirculation pump incorporates with variable-speed control and built-in control algorithms that can adapt to continuously changing system requirements. Featuring on-demand mode, this pump includes a sensorless demand-based control that allows users to obtain instant hot water when needed.
The Taco 0015e3 is a three-setting, electronically commutated motor (ECM)-powered circulator. With three settings, the 0015e3 is ideal for hydronic systems zoned with circulators or zone valves and provides three maximum-feet-of-head pressure settings to match system requirements — low (5 feet), medium (10 feet), or high (18 feet) with a maximum flow of 16 gallons per minute (gpm).
The devil is in the details, and the wrong choice can cause issues now or in the future
May 1, 2017
When replacing a component, it is generally best practice to obtain its replacement by referencing its part number and installing a component with the same part number. Unfortunately, this is not always possible or practical. Due to the nature of the systems we service, many times we are forced to select a replacement component based on either a cross-reference or by matching its specifications to those of the original component.
In a perfect scenario, the oil in a refrigeration or air conditioning system would stay inside the compressor’s crankcase to lubricate the compressor’s moving parts. However, because of ever-changing heat loads on the system and varying system conditions there is no such thing as a perfect system in the real world.
TG Series units are oil-free, variable-speed, magnetic-bearing, and centrifugal compressors. The compressors provide full- and part-load energy efficiency and feature a small footprint, light weight, low vibration, low sound, intelligent controls, and soft-starting characteristics.
Several leading compressor manufacturers weighed in with insights and advice for contractors and technicians as they learn how to work safely with the equipment utilizing these so-called alternative refrigerants as they transition into primary refrigerant choices.