How Important Is the Installation Environment of Refrigeration Units? Just Do These 4 Points!

2025-03-18

The refrigeration equipment (compressor unit) is installed in the machine room, and the surrounding environment should be maintained as follows:

In the height direction of the refrigeration compressor, there should be a clear space of not less than 1.5m. In the front and back, there should be a clear space of not less than 0.6 - 1.5m. On the side close to the wall in the left - right direction, there should be a clear space of not less than 0.6m, and on the other side, there should be a clear space of not less than 0.
9 - 1.2m.
The ambient temperature should not be lower than 10℃.
When the unit is installed outdoors, there must be facilities to prevent wind, rain, and sun, as well as measures to prevent corrosion and ensure electrical insulation. It should be isolated from high - temperature heat sources, flammable and explosive items, or explosive containers.
The machine should be shock - proof and sound - proof.

Requirements for the construction of refrigeration equipment:

The foundation of the refrigeration equipment (compressor unit) should have sufficient strength, and the concrete foundation should be buried below the ground level. Usually, the weight of the foundation is about 2 - 5 times that of the compressor unit. For small and medium - sized units, the refrigeration compressor and the motor can be first installed on a common chassis and then installed on the foundation.
The refrigeration equipment (compressor unit) should be installed horizontally. A level with an accuracy of not less than 0.
02 - 0.05mm/m and wedge - shaped shims can be used for leveling and adjustment. To reduce vibration and noise, shock - absorbing devices such as rubber shock - absorbing pads and springs should be installed between the machine base and the foundation.
The belt of the refrigeration compressor should be aligned and parallel to the pulley groove of the motor, and the tightness of the belt should be appropriate. The inspection method is to press the middle position of the belt span by hand. For a belt with a length of 100mm, a deflection of about 1mm is appropriate.
The condenser should undergo a pneumatic test at 176.4N/cm² during installation. The liquid outlet pipe of the condenser should be inclined towards the liquid receiver with a slope of 1/1000. Before the installation of the evaporator, a pneumatic test at 156.
8N/cm² should be carried out first. A 50 - 100mm - thick insulating hardwood pad should be added between the base of the evaporator or cooling coil and the foundation surface, and it should be coated with asphalt for anti - corrosion. For small - tonnage cold storages, a liquid regulating station may not be set, and the liquid is directly supplied from the liquid receiver. For large - tonnage cold storages, if the warehouse is composed of several cold rooms, and each cold room is equipped with an evaporator or cooling coil, a liquid regulating station must be set. The liquid is supplied from the liquid receiver to the regulating station, and then from the regulating station through the throttle valve to each evaporator or cooling coil.
The connection methods of pipelines generally include welding, threaded connection, and flange connection. Except for places where threaded connection or flange connection is necessary for installation and maintenance, welding should be used as much as possible. When using threaded connection, lead oil or polytetrafluoroethylene sealing tape should be applied to the threads. When using flange connection, the flange joint surface should be made with a male - female stop, and a 1 - 3mm - thick medium - pressure asbestos rubber sheet gasket coated with lead oil on both sides should be added inside the stop.
Pipe installation slopes: The horizontal pipe section of the oil separator in the exhaust pipeline of the refrigeration compressor should be inclined towards the oil separator at a slope of 0.3% - 0.5%; the pipe section from the oil separator to the condenser should be inclined towards the condenser at a slope of 0.3% - 0.5%; the horizontal section of the liquid outlet pipe from the condenser to the high - pressure liquid receiver should be inclined towards the high - pressure liquid receiver at a slope of 0.5% - 1.0%; the horizontal pipe section from the liquid regulating station to the cooling coil should be inclined towards the cooling coil at a slope of 0.1% - 0.3%; the horizontal pipe section from the cooling coil to the gas regulating station should be inclined towards the cooling coil at a slope of 0.1% - 0.3%; the horizontal pipe section of the Freon suction pipe should be inclined towards the refrigeration compressor at a slope of 0.1% - 0.3%.
For pipe bending, when the pipe diameter is below Ф57, the bending radius should be not less than 3 times the outer diameter of the pipe; when it is above Ф57, the bending radius should be not less than 3.5 times the outer diameter of the pipe. The connection of pipes should consider the thermal expansion and contraction of the pipes. Therefore, when the low - pressure pipe exceeds 100m and the high - pressure pipe exceeds 50m, expansion bends should be added at appropriate positions in the pipeline.
The support base of the wall pipe should be added with insulating hardwood, the wall pipe should be more than 150mm away from the wall, and the ceiling pipe should be more than 300mm away from the ceiling.