HVAC engineers

 Here are the common types of heating systems: 1. Forced Air Systems:   Use ducts to distribute warm air throughout the building. 2. Radiant Floor Systems:   Warm floors and spaces through radiant heat transfer. 3. Baseboard Systems:  Use electric or hydronic heating elements installed along baseboards. 4. Space Heaters:   Portable or fixed heaters for localized warmth. 5. Heat Pump Systems:  Reverse refrigeration cycles for both heating and cooling. 6. Boiler Systems:   Use hot water or steam for space heating and domestic hot water. 7. Furnace Systems:   Use combustion or electric resistance to warm air. 8. Infrared Systems:   Use infrared radiation for direct heat transfer. 9. Geothermal Systems:   Harness earth's heat for efficient and sustainable heating. 10. Solar Space Heating :  Utilize solar energy for space heating. 11. Steam Heating Systems:   Use steam for space heating and domestic hot water. 12. Hydronic Systems:...

 Part 1 - Refrigerant Flood Back  Foaming can be clearly seen in the compressor oil sight glass, this is a clear indication of the prescence of liquid refrigerant in the oil. Refrigerant flood back occurs during the running cycle of the machine. This is where large volumes of liquid refrigerant are returned to the running compressor down through the Suction pipe work, in an uncontrolled manner. Depending on the degree of liquid returning to the compressor, determines as to what damage will occur. This can often be seen as foaming in the compressors’ oil level sight glass. Here we have evidence of a seizure of the bearing If liquid is drawn into the cylinder bores, the lubrication to  the cylinders and pistons will be washed away causing scoring and overheating in the cylinder, which in turn will lead to small metallic particles contaminating the inside of the machine. This liquid will also dilute the lubricat...