manufacturers color coded the exteriors of the HVAC gauge (compound gauge and high pressure gauge) to distinguish between high pressure and low pressure pressure gauge or compound gauge is color coded blue and the high pressure gauges are color coded red. Don’t confuse this with the manifold gaugesIt’s not color coded. The AC gauge hoses are color coded in blue, yellow, and red. gauge hoses port are not color coded, but the hose is color coded. hoses are used to connect the manifold to the low pressure side (central air color coded red mark the high pressure gauges and it’s connected to the air conditioner unit discharge valve or liquid line valves. color code the hand valves. manifold gauge uses flexible hoses with connector on both sides. are label with maximum pressure in PSI or bar. This mean that if someone used the wrong hoses with the wrong pressure it will burst. located in the left hand of HVAC gaugesThe compound gauge is mounted on the left side of the air conditioning gauges.

The compound gauges allow the HVAC technician to measure both pressure. atmospheric pressure and vacuum pressure (blow atmospheric pressure). what compound gauge looks like: gauge is a R-22 gauge (There is a R410A, 134A compound gauge).In this gauge we could . pressure scales are in black and in red number. The black numbers are above atmospheric pressure, which range from zero to 150 pounds per square inch gaugeHowever, I couldn’t label all of it, so we only see zero to 100 psi in pressure below atmospheric pressure is in red number and it’s read in inches ofThe below atmospheric pressure is measure from zero to 30 in. the actual compound gauge: conditioner gauges are a pressure and temperature charts in a gauges. read it the same way we read a pressure and temperature chart. every HVAC technician looks at gauges, he or she either looking for pressure orLet say we have R -22 refrigerants and the temperature is 33°F, but we don’t know the pressure.

used the pressure temperature chart or the manifold gauges to find out what is the pressure of R-22 refrigerant. That pressure would be 58.8 psi for R-22 sample of temperature and pressure chart in HVAC gauges: temperature and pressure charts above, the Temperature scales are on the leftlg room air conditioner defrost mode side and it’s in Fahrenheit or Celsius. air handling unit for auditoriumOn the right side we have thesmall ductless ac units difference types of AC refrigerant pressure.Ex. HCFC-22 refrigerant has a pressure of 62.9 psi, what is the temperature of R-22The temperature would be 36 °F or 2.2 °C. valuable information about the manifold gauge set is it could read a pressure

and temperature of refrigerant in a close system. All HVAC gauges set read theExcept the pressure and temperature scales are different for R-134, How to use HVAC manifold gauges videos Make sure to press the Play button in the player controls to watch it. Air conditioner gauges training Videos made by DrZarkloff pressure gauge is mounted on the right side of the manifold set. This air conditioning gauges set measure pressure above theIt reads from 0 to 500 psi and it scales is usually in 2-lb. or 5-lb. increments. pressure gauge is label the same way as the compound (low pressure gauge), except we couldn’t read inches of mercury in high pressure gauge. black number is the PSI scale and the inner number is the refrigerant temperature of R-502, R-22 and R-12. the actual high pressure gauges: field, we don’t have single set of HVAC gauges that work on every refrigerant. It saves us money and time if we have it. reason we don’t have single HVAC manifold gauge is because of the refrigerant

Each air conditioner Freon has a difference pressure, chemical compound, and boil points. However, that isn’t the main factor. refrigerant pressure and it temperatures scales. conditioning manifold gauge we carry:This means that we can’t use R - 22 gauges manifold to read an R - 410A refrigerant. It would damage the R- 22 gauge set due to high pressure of R 410 Return to central air conditioner and refrigeration R-410A, sold under the trademarked names Suva 410A, Forane 410A, Puron, EcoFluor R410, Genetron R410A, and AZ-20, is a zeotropic, but near-azeotropic mixture of difluoromethane (CH2F2, called R-32) and pentafluoroethane (CHF2CF3, called R-125), which is used as a refrigerant in air conditioning applications. R-410A cylinders are colored pink. Unlike alkyl halide refrigerants that contain bromine or chlorine, R-410A (which contains only fluorine) does not contribute to ozone depletion, and is therefore becoming more widely used, as ozone-depleting refrigerants like R-22 are phased out.

However, it has a high global warming potential (1725 times the effect of carbon dioxide), similar to that of R-22. [2] Since R-410A allows for higher SEER ratings than an R-22 system, by reducing power consumption, the overall impact on global warming of R-410A systems will be substantially lower than that of R-22 systems due to reduced greenhouse gas emissions from power plants. R-410A was invented and patented by Allied Signal (now Honeywell) in 1991. [4] Other producers around the world have been licensed to manufacture and sell R-410A, but Honeywell continues to be the leader in capacity and sales.[5] R-410A was successfully commercialized in the air conditioning segment by a combined effort of Carrier Corporation, Emerson Climate Technologies, Inc., Copeland Scroll Compressors (a division of Emerson Electric Company), and Allied Signal. Carrier Corporation was the first company to introduce an R-410A based residential air conditioning unit onto the marketplace in 1996 and holds the trademark "Puron".

R-410A has replaced R-22 as the preferred refrigerant for use in residential and commercial air conditioners in Japan, Europe and the United States. Parts designed specifically for R-410A must be used as R-410A operates at higher pressures[9] than other refrigerants. Thus R-410A systems require service personnel to use different tools, equipment, safety standards and techniques. Equipment manufacturers are aware of these changes and require the certification of professionals installing R-410A systems. In addition the AC&R Safety Coalition has been created to help educate professionals about R-410-A system. In accordance with terms and agreement reached in the Montreal Protocol (The Montreal Protocol on Substances that Deplete the Ozone Layer) the United States Environmental Protection Agency has mandated that production or import of R-22 along with other hydrochlorofluorocarbons (HCFCs) be phased-out in the United States. In the EU and the USA, virgin R22 cannot be used for manufacture of new air conditioning or similar units from 1 January 2010.