CCHA/ECHA – CCHBA/ECHBA
Installation, operation and maintenance instructions
21
NOTES :
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Refrigerant lines should be as short and straight as possible. Use recommended diameters
to reduce quantity of refrigerant in the system.
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Fasten the tubes to fixed elements by means of braces to avoid vibration.
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Carry out welding works in dry nitrogen atmosphere inside the line to be welded -USE A
BOTTLE WITH PRESSURE REGULATOR- to avoid the appearance of oxide and to expel rest of
polluting material or humidity. Use rods with a minimum 15% of silver alloy.
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Insulate suction line in order to avoid condensation. Liquid line will be insulated only when
exposed to high temperatures (solar radiation, etc.)
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Horizontal segment of suction line: 4% pitch towards the compressor.
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In addition to refrigerant, sometimes it’s necessary to add oil. For more than 25 meters,
add 30 grams.
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When height difference is more than 30 meters, it may be necessary to install an oil
separator on discharge line.
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If liquid line is descendant and there is a considerable height difference, you have to
compensate the excess pressure before the expansion.
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If liquid line is ascendant and there is a considerable height difference, the formation of gas
refrigerant before the expansion must be avoided.
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If you should not find the chosen pipe diameter, you can use the immediately lower
diameter. The system will function normally only with a slight reduction of performance.
