We did have high humidity as well as 90s temperature, so what I saw fits with what you said. It even cycled the compressor and high speed fan by means of the high pressure safety switch(new, also hoses, dryer, reduction valve new) After the hot spell passed, I got 83 psi at 73 degrees f ambient.before starting the system. The system should be recovered, vacuumed (min 20 minutes) and charged. If the high and low gauges read 0, the system is empty.Let’s get this straight from the get-go, gauges can tell you if the system pressures are in a normal range, over-pressurized, or under-pressurized, but they CANNOT tell you if the system has the correct charge. R-134a TEMPERATURE PRESSURE CHART FOR ORIFICE TUBE SYSTEM — ENGINE AND AC RUNNING. If the compressor ain't spinning, static pressure, doesn't tell you a thing about charge, can be either just 2 ounces or 50 ounces in the system, pressure would read the same. Engine on and a/c running on max cooling - High side 175, Low side 25 to 28 (the compressor is drawing down ok on low side when it cycles). Some low pressure ports are located on the accumulator, while others are located on the metal portion of the lines. This is an indication of a low chargeAmbient Temperature °F/°C Low-Pressure Gauge High-Pressure GaugeThere is a DIRECT relationship between ambient temperature at your location and the pressures you see on your gauges. )Jd���RwX�U,�~*�EJ��i?���Rx��j�nԧ�WRɓ�Z�,O��>��zuŔᵔk7�RaG[K'��e@m)�jKiT[J�Zi���V�Im%��V�I�a�-�Qm)�jK�V ԖҨ��F��tR+pY%�jKiT[J'�� �UҨ��F��4���U�Im%��V�I���*iT[J��R:�����F��4�-��Z)��*iT[J��R:�����F��4�-���� ��Ҩ��F��4����U�Im%��V�I�a�e�4�-�Qm)��*\VI��RՖ�I�P�e�4�-�Qm)��2
\VI��RՖҠ�9\VI'��tR[I'�v.��Qm)�jK�Vs�JՖҨ��Nj�.��Qm)�jK餖+�JՖҨ��NjG�\VJ��RՖҠ�.1���pRZ I have sourced this the best I could but there is always going to be conflicting data. R-134a System Pressure Chart. Used this to fill a new A-C system. Suction pressure was 50 plus psi running. The gauges readings will depend on the ambient temperature. Using the chart below, if the R-134a system has a static pressure of 88 psi at 80 degrees F., we can then assume the … Additionally, HVAC Systems such as chilled water systems in both commercial markets and industrial markets. TS�i�}�!k`�#��&�d�QN�q!Y�M#;�Fb � 3�F_#�-�\s� s��\k�%��!,
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` G��!X�ñT6�x��%? It can be used for recharging refrigerant, or to diagnose an a/c system based on pressure readings from your gauges. R-134a TEMPERATURE PRESSURE CHART (Tabla de Temperaturas y Lecturas) Ambient Temperature °F / °C (Temperatura Ambiental): Low-Pressure Gauge (Puerto de Servicio del Lado de Baja Presion): High-Pressure Gauge (Puerto de Servicio del Lado de Lado de Alta Presion): 65°F (18°C) 25-35 psi / 172-241 kPa: 135-155 psi / 931-1069 kPa If your static pressure shows more than that, the compressor clutch should engage. For a better experience, please enable JavaScript in your browser before proceeding. Does it seem to y'all that there is too much R134a in the system?
An R134a temperature‐pressure chart shows what the refrigerant temperature should be at a specific pressure. Understanding the pressure that your system is at as well as knowing what the saturation point is of R-134a will allow you to properly diagnose what is wrong with your system. Remember, that air conditioning is basically changing the pressure on the refrigerant until a state change is reached.
At 70°F the 3-ounces have boiled and turned into a gas, generating the same amount of pressure as a fully charged system at the same temperature.The ONLY thing a static pressure reading can tell you is if there is enough pressure in the system to satisfy the low pressure switch and allow the compressor clutch to engage. You’ll need manifold gauge set if you want to properly diagnose your car AC with gauges. If you don’t know which system you have, you can misinterpret the low side readings right off the bat and think your system is undercharged.
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