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 left side and it’s in Fahrenheit or Celsius. On the right side we have the 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.indoor wall mount ac unit black number is the PSI scale and the inner number is the refrigerantwall air conditioner units canada temperature of R-502, R-22 and R-12. central air conditioner repair prices 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 refrigerationHow to Hook Up & Read HVAC Gauges When you are working as a heating, ventilation and air conditioning service technician, also known as an HVAC technician, your set of gauges is one of your biggest assets. Gauges are used to read the pressure of various liquids and gases in a cooling system, as well as vacuum pressure when you are pressure testing or charging the device. There are a number of different ports on the HVAC gauge set, also known as a manifold, and the main difference in the types of manifolds is the number of ports that you have available to attach accessories to, as well as the pressure that the gauge set can withstand, which is important when working with different refrigerants.

Connect the high pressure side of the cooling line to the red port on the gauge. The red port and red gauge are always the high pressure gauges. You will want to attach a code-approved red hose, which is made to withstand high pressure, using the flare fittings that are included with it, to the high pressure port on the cooling unit. The high pressure port is typically of a different size and thread pitch than the low pressure side in order to avoid the potential for accidental incorrect hookups. Connect the low pressure side to the blue port on the gauge. The low pressure side will be connected with a blue low pressure hose to the blue pressure gauge and the low pressure side of the cooling unit. This will allow for the proper flow of vacuum pressure or a micron meter in order to determine the vacuum pressure in the system already. Attach a waste hose or vent hose to the center of the manifold set up. If you are going to discharge a unit, or if you are going to vent freon by attaching the unit, you will need to attach the larger black low pressure hose to the center port of the manifold.

By doing so, you will be able to attach a refrigerant recovery bottle to the manifold set to avoid violating federal law regarding the release of refrigerant into the atmosphere. Attach micron meters or other gauges to the additional ports. The additional ports on the manifold can be used to attach micron (vacuum pressure) gauges, or even a vacuum pump, in order to perform the proper services to the cooling system as required for the repair that you are making. Air Conditioning and Refrigerant: Service How to Hook Up & Read HVAC Gauges. When you are working as a heating, ventilation and air conditioning service technician, also... Hooking a Gauge Set Up to a Refrigerant Canister. Part of the series: How to Recharge an Auto A/C System. How to Hook Up & Read HVAC Gauges; How to Read an R-134A Manifold Gauge Set; These gauges give you a reading in pounds per ... Connect the blue gauge on the C-manifold to the low side service... This is done by hooking the refrigerant gauges up to the high and low side and starting the vacuum pump.