chillers

Compressor Rebuild | HVAC Heating and Cooling Refrigeration

Compressor Rebuild – This freshly rebuilt reciprocating compressor is destined for a large commercial chiller. Chillers chill water for air conditioning. Compressors compress refrigerant vapor and pump the compressed refrigerant to the condenser to be condensed into a liquid. The compressor provides compression which is an integral part of the refrigeration process. The old compressor was […]

HVAC Centrifugal Compressors | HVAC Refrigeration

HVAC Centrifugal Compressors – Centrifugal compressors are used in many applications including pipeline transport of natural gas along with many other related applications including vapor compression refrigeration. These compressors have different operating limitations than the reciprocating compressor, the scroll compressor, and the rotary compressor. They an operating range where it operates efficiently however outside of this […]

Actuators for Chilled Water Valve | DDC Commercial Systems

Actuators for Chilled Water Valve – These chilled water actuators control the flow rate for a chilled water system in a data center. There are various sequence of operations for chilled water systems and the sequence of operation is usually always different from one chiller plant to another chiller plant. It depends on the components in […]

About Chilled Water Systems | HVAC Hydronics

About Chilled Water Systems | HVAC Hydronics About Chilled Water Systems – Chilled water systems are mainly used in large commercial HVAC air conditioning systems and industrial cooling applications although there are some residential and light commercial HVAC chilled water systems in use. Chilled water systems are popular because they use water as a refrigerant. […]

Chilled Water Pipe Vibration Isolators | HVAC Piping

Chilled Water Pipe Vibration Isolators Chilled Water Pipe Vibration Isolators – Vibration isolators protect the chilled water piping from receiving vibrations transmitted through the piping when the chillers are running. The vibrations can create problems not only for the chilled water piping but also for the buildings structure. The vibration isolators reduce or eliminate the […]

Crankcase Heaters and Compressors | HVAC Refrigeration

Crankcase Heaters and Compressors Hello, I have a question about crankcase heaters, I am aware that they are for the purpose of keeping the refrigerant from being saturated in the compressor when not running, but if the refrigerant is R-22, and it becomes saturated at approx. 40 degrees, & the a/c unit is only operating […]

DDC Controlled Chilled Water Actuator | HVAC Automation

DDC Controlled Chilled Water Actuator | HVAC Automation This chilled water actuator is attached to a valve which supplies chilled water to the air handling unit chilled water coil. The actuator modulates the valve based on a set point inside the DDC program. If the program has trim and respond capabilities the set point will […]

HVAC 3R NEMA Rated Control Panels | DDC Installation

HVAC 3R NEMA Rated Control Panels HVAC 3R NEMA Rated Control Panels – These control panels offer resistance to inclement weather. They house the DDC controllers for two small chillers and two air handlers. The chillers provide chilled water for air conditioning to the air handlers. The controllers offer energy management for the air conditioning […]

Large Condenser Pump for a Chilled Water System

Large Condenser Pump for a Chilled Water System This large HVAC condenser pump serves a new chiller located in a data center. This pump pumps condenser water through the condenser chiller barrel and to a cooling to reject the heat absorbed in the chillers evaporator barrel. The pump works to move the water from the […]

Old McQuay Chiller Control Panel | Electro-Mechanical Controls

Old McQuay Chiller Control Panel This panel is part of the controls for an older McQuay chiller. New chillers whether they be McQuay, Trane, York, or Carrier chillers still require these types of controls in them to make them work. This part of this electro-mechanical control panel consists of contactors and switches (both manual and […]

Chilled Water System Basics | HVAC Cooling

Chilled Water System Basics Chilled Water System Basics – Chilled water systems work much the same way as direct expansion systems work except they used chilled water in the coil rather than refrigerant (Technically speaking, water can be classified as a refrigerant). Chilled Water systems can be rather complex and many chilled water systems are […]

Alerton BTI DDC Controller Building Automation

This is the main DDC controller for Alerton. It communicates with all the other controllers in the field serving the building automation system and connects those system with a computer or modem. This controller is being installed in a building with over 200 VAV boxes, several VAV air handlers, a steam to hot water system […]

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