Compressor Rebuild | HVAC Heating and Cooling Refrigeration

Compressor Rebuild

The compressor in an HVAC refrigeration system

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. It is an essential component of the refrigeration system.

The compressor provides compression which is an integral part of the refrigeration process. The old compressor was condemned for electrical burnout. The windings in the old one burned up and caused the circuit breaker to trip. (more…)

Air Handler Water Coil Freeze Stat | Freezing Protection Control

Air Handler Water Coil Freeze Stat - Freezing Protection Control
Air Handler Water Coil Freeze Stat - The HVAC Air Handler Freeze Stat is a low-temperature limit control and it is used mainly in commercial systems in the ductwork on economizers or in air handlers just before any coil especially water coils. It is a safety and protection control to prevent extremely cold air from reaching the hot water or chilled water coils inside the air handler where the air enters from the economizer.

Under ideal control setup if the freeze stat trips the economizer dampers close and the blower fan stops. This prevents coils from freezing. A frozen coil can bust open and will need to be replaced if it freezes. This is the purpose of the freeze stat in HVAC air handler applications which utilize economizers for free cooling and other purposes.
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About Chilled Water Systems HVAC Hydronics

About Chilled Water Systems About Chilled Water Systems HVAC Hydronics - 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. Water is far less expensive than refrigerants. This makes them cost-effective, especially in commercial HVAC air conditioning applications. (more…)

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 building’s structure. The vibration isolators reduce or eliminate the vibrations that can be transmitted by the chillers. (more…)

Cooling Tower Fan | Commercial HVAC

Cooling Tower FanThis is an HVAC chilled water system cooling tower fan for a large chilled water system. Four large cooling towers for two chiller plants in a data center. Data center cooling systems generally are redundant not only for emergency situations but also for maintenance. The cooling tower fan typically has vibration switches installed in the fan assembly to shut the fan off in the event of too much vibration. (more…)

Belimo Actuators Automatic Valve Control

Belimo Actuators HVAC Automatic Valve ControlBelimo Actuators Automatic Valve Control - Many processes or actions in HVAC are made more efficient by having them automatically controlled by the control system. This enhancement of efficiency is possible by using Belimo actuator valve control. The Belimo automatic HVAC valve control is made possible with DDC and modulating electric Belimo actuators. (more…)

Large Condenser Pump for a Chilled Water System

Large Condenser Pump for a Chilled Water SystemLarge 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 cooling to reject the heat absorbed in the chillers evaporator barrel. The pump works to move the water from the chiller to the cooling and then back through the chiller again. The water is diluted with a glycol solution to prevent freezing in the wintertime when the chiller needs to run at low ambient temperatures. (more…)