Manometer Analyzer 1 Way High Viewer 68Mm R410A R407C R32 R134A

* How to use a gas analyser:

When carrying out gas charging, we will need several measuring devices and some tools.

There are several methods for adjusting the refrigerant charge as well as the mechanism when charging equipment.

First and foremost, as the main component, we will need a pressure analyser. Normally a two-valve analyser is used, but we should note that four and five-valve models also exist on the market.
The analyser consists of two valves, one for low pressure and another for high pressure. Two pressure gauges, one blue in colour which will indicate the low pressure, its range is usually 0 to 10 bar and incorporates several pressure-temperature scales for the most characteristic gases (R 22, R 134a, R 407C), the other gauge will be red in colour, this will indicate the high pressure, its range is usually 0 to 30 bar, and as in the case of the low pressure gauge, it also incorporates several temperature scales for the aforementioned gases.

The analyser has three SAE ¼ threaded couplings for gases such as R 22, R134a, R 404 and R 407C, for R 410C gas you should use 5/16 threaded couplings as it operates at higher pressures. Hoses will be connected to these three threads which will connect on one side the low pressure part of the refrigeration equipment to the low pressure gauge (blue), on the other side the high pressure part of the refrigeration equipment to the high pressure gauge (red) and a hose connected to the central thread which will be used as a service hose which will be yellow in colour. The refrigerant gas bottle will be connected to this yellow hose. It also incorporates a sight glass where the passage of refrigerant fluid can be visualised.

First, a series of precautions will be followed. It will be checked that all couplings have no damaged threads, dirt, dust, oil or grease. It will be verified that the pressure gauge sight glasses have no dust, if so a clean cloth will be used. Under no circumstances should they be cleaned with aggressive detergents or disinfectants.

Secondly, the hoses will be purged. The yellow hose is connected to the refrigerant bottle which will be closed. The low pressure (blue) hose is connected to the refrigeration system. The bottle is opened. When the hoses are full of gas, the air is purged from them. We will carry out the same operation for the high pressure (red) hose.

The charge can be carried out by low or high pressure:

By low pressure (pure or azeotropic gases)

The yellow hose is connected to the refrigerant gas bottle, purged and the system is saturated with gas. Once the pressures equalise, the refrigeration equipment is started and the low pressure valve on the analyser is opened so that the system itself introduces the gas into the equipment. The bottle can be heated to increase the temperature and in turn the pressure, thus allowing us to introduce gas more quickly.
This method is the most commonly used as the superheat and subcooling offered by the refrigeration circuit can be measured and adjusted without needing to know the final weight of refrigerant. Another indicator that will help us to know if the charge is adequate will be the power consumption intensity of the compressor as well as the temperature differences that we can measure in the heat exchangers.