Fluidized-Bed Heat Exchangers. In a fluidized-bed heat exchanger, one side of a two-fluid exchanger is immersed in a bed of finely divi...

Physical Properties of Refrigerants R-417A Environmental Classification HFC Molecular Weight 106.8 Bubble Point (1 atm, ºC) -39.1 Critic...

Daikin ENVi Thermostat Installation ManualStep . Position and Wire the DPCA The Daikin Power and Communication Adapter (DPCA) provides a...

PRE-FILTER FUNCTIONS Pre-filters are a nice feature to have in your air purifier. It also expands the lifetime of HEPA and activated car...

Screw compressor By Imran How does a screw compressor work? Here we will look a bit closer at the screw air compressor technology. Wha...

SCROLL COMPRESSOR A scroll compressor is a specially designed compressor that works in a circular motion, as opposed to up-and-down piston a...

CALCULATING RELATIVE HUMIDITY By Mohammad Imran Calculating the RH requires the correct equation(s). The RH is the amount of moistu...

Symptoms of brain fever: 1. Pain in the heart 2. Feeling weak in the muscles 3. Haemiparesis - Feeling weakness in all outer organs...

thermostatic expansion valve or TXV — can cause a number of symptoms in a system. Here are the ways a TXV can become restricted: Wax bui...

Troubleshooting an Overheating Compressor Here are a few tips you can try to find the issue before contacting a professional: High head...

A scroll compressor is a specially designed compressor that works in a circular motion, as opposed to up-and-down piston action. ...

Difference Between Star and Delta Connection are as The terminals of the three branches are connected to a common point. The n...

Chemical fluid leakage How To Recognise Five of the Most Common PCB FailuresThe presence of any chemical fluid that has leaked from a compo...

The most common signs and symptoms of heat exhaustion include: Confusion Dark-colored urine (a sign of dehydration) Dizziness Fainting Fat...

For an air conditioner to cool a room or building its output must be greater than the heat gain. It is important before purchasing an air ...

1.Question 1. What Is Local Comfort Cooling System? Answer : They may be integrated, with heating, ventilation and air conditioning provide...

Some items are hazardous by nature, while others only become hazardous if used inappropriately or carelessly. Often, accidents don’t just ...

The oil return in refrigeration systems is of key importance for the service life of the compressor and thus for a secure constant supply of...

OIL FAILURE SWITCH An oil failure switch is provided with high-speed compressors. This differential pressure switch is designed to preven...

HIGH-PRESSURE CUTOUT SWITCH A high-pressure cutout switch is connected to the compressor discharge line to protect the high-pressure side...

LOW-PRESSURE CUTOUT SWITCH The low-pressure cutout switch is also known as a suction pressure control switch. It is the control that causes ...

load or heat gain A building or room gains heat from many sources. Inside occupants, computers, copiers, machinery, and lighting all produce...

A building management system can add significant operating costs savings to your company, while providing security to your property, resourc...

If your AC stays on longer than it should, you may have a dirty filter. Clean or replace your filter to see if that remedies the situation....

VAV Air Handlers The air handler blower fan needs to modulate to vary the air flow depending on demand. Typical Variable Air Volume boxes h...

Direct Expansion Air Conditioning What It Is A direct expansion air conditioning (DX) system uses a refrigerant vapour expansion/compressi...

Chiller Descaler Why descale your chiller? Chillers, condensers and even cooling towers require maintenance due to the harsh mineral deposi...

Electrical Safety Lock Out Tag Out (LOTO) What is LOTO? Answer --) Electrical Lock Out Tag Out the physical restraint of all hazardous en...

bearings A mechanical bearing is a component used between two parts that allows rotational or liner movement, reducing friction and enhanci...

Heat load or heat gain A building or room gains heat from many sources. Inside occupants, computers, copiers, machinery, and lighting all pr...

VRV or VRF ? What’s the difference between VRV and VRF? Many people who ask this question, mistakenly interpret it as 2 different HVAC te...

A Variable Frequency Drive (VFD) is a type of motor controller that drives an electric motor by varying the frequency and voltage supplied t...

The overload relay is a protection device used in the compressor circuit on your refrigerator. Power is applied to the compressor motor win...

In a centrifugal compressor, 'surge' is a name given to a dangerously unstable gas condition in the compressor and condenser. Put s...

The flow separation will eventually cause a decrease in the discharge pressure, and flow from suction to discharge will resume. Surging can ...

Community Water Treatment Drinking water supplies in the United States are among the safest in the world. However, even in the U.S., drinki...

A vacuum is maintained in the condenser so that steam can easily flow and more work can be extracted from the steam in the turbine. How does...

Filter Driers Filter driers are devices used in a HVAC system that are a combination of filter and dryer (or drier). A filter is used ...