37
Figure
9.12 Tubing configurations
Notes:
• The above tubing configurations are guidelines to minimize tube stress.
• Follow similar guidelines for discharge tubing and oil return tubing if needed.
• In case of tube length of over 500 mm is required, intermediate clamps may be necessary.
• Do not hang weights on tubing (e.g. filter drier on suction tubing), allowed positions for weight hanging is
close to clamps or header.
• Tube runs of less than 200 mm is not recommended.
• Pipe connection to compressor should be made as short as possible (e.g. 50 mm or less) but still assuring a
proper braze joint.
The above tubing recommendations are base on the lowest possible amount of joints. The use of continuous
tubing is preferred.
Recommendations:
Use the copper tube special for refrigeration application, make sure there are no residual moisture, dust and
impurities inside the copper tube, keep clean and dry. Remove the plug until to use it. Use special tool - tube
cutter to cut the copper tube. Never cut the copper tube with a saw. Vacuum from both high pressure side and
low pressure side, make sure all valves (including liquid line solenoid valve) are “on”.
Vacuum standard: Suggest to vacuum the system to below 60Pa (500umHg). Use vacuum gage to measure
the vacuum degree. The gage should be put on the far end of the pump.
Never use scroll compressor to vacuum the system. During the brazing copper tube, charge the dry nitrogen
into the tube continuously to avoid forming the oxide skin inside the copper tube.
9.13 CONNECTIONS
Scroll compressor connectors (suction, discharge and injection) are made of copper plated steel. They are
more robust and less prone to leaks than copper tubes. Connectors are delivered with fitted rubber plugs.
Embraco offers 2 connection types: brazing and Rotolock, as per follow Table:
CLAMP
SOLENOID
(MUST BE SECURED)
WARNING
50 mm or less
CONTINUOS TUBING
(NO ELBOWS)
< 500 mm
