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Commercial refrigeration electrical system components disassembly, diagnosis and maintenance
author: supermarket refrigerated showcase category: walk-in display coolers Views: 515Time: 2016-08-22
commercial refrigeration electrical system components disassembly, diagnosis and maintenance
The disassembly and diagnosis of electrical system components must be carried out with the commercial refrigeration power supply unplugged.
A thermostat with good performance in disassembly, diagnosis and maintenance can sense the temperature of the evaporator through the temperature sensing tube, disconnect or connect the compressor circuit, thereby achieving the purpose of controlling the temperature of commercial refrigeration. Both ordinary commercial refrigeration and intercooling commercial refrigeration thermostats are fixed in the refrigerator compartment, and the temperature sensor is fixed on the surface of the evaporator. Dual-temperature dual-control commercial refrigeration thermostats are mostly fixed outside the commercial refrigeration, but the temperature sensing heads are respectively fixed in the freezer compartment of the refrigerator. Therefore, ordinary commercial refrigeration, dual-temperature dual-control commercial refrigeration, and indirect commercial refrigeration thermostats have different turn-on and turn-off temperatures, as well as differences in disassembly and assembly methods and judgments.
Identification methods of various thermostats: the one with one adjusting screw is commercial refrigeration or dual-temperature dual-control commercial refrigeration refrigeration thermostat; the one with more than two adjusting screws is the refrigeration thermostat, and the intermediate cooler thermostat The temperature sensing tube is short, dual temperature and dual control commercial refrigeration The temperature sensing tube of the refrigeration thermostat is long and the top is spiral.
Ordinary commercial refrigeration thermostat disassembly, diagnosis and maintenance
(l) Ordinary commercial refrigeration thermostat disassembly method Ordinary commercial refrigeration The fixed position of the thermostat. The main body is generally installed in an electrical box (also called a thermostat box), and the temperature sensor is fixed on the back of the refrigerator (surface of the evaporator). Steps for disassembling the thermostat, open the lamp shade box to expose the fixing screws of the electrical box inside it. Pull out the adjusting button. Remove all the fixing screws of the electrical box. Remove the electrical box. After plugging in the position, unplug one by one, remove the fixing screws of the thermostat, remove the fixing cover of the temperature sensor head of the temperature controller, remember the winding length of the temperature sensor, and then remove the temperature sensor. The installation of the thermostat is actuallyThe reverse process of disassembly.
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