Refrigerant Pipe Connections
Pipe Installation
Run the suction and liquid lines in appropriately sized refrigeration copper tubing as detailed on page 10 of this installation manual.
When calculating the effective run take into account any bends or oil traps.
Note: 90 deg elbow equivalent length = 25 x pipe O.D.
Note: Oil trap equivalent length = 50 x pipe O.D
Where the vertical separation exceeds 3 metres, oil traps must be fitted at half the vertical distance as shown above. Ensure the
refrigerant lines are adequately supported using refrigerant pipe clips.
Unit Connections
The indoor and outdoor unit connections are terminated in male flare connections as detailed on page 10 of this manual. Place flare
nuts onto the copper tube before preparing the tube with a flaring tool (above right). When connecting to the male flares ensure both
surfaces are clean and coat the flared surface with refrigerant oil to help ensure a leak free joint. When tightening the joint use two
spanners to prevent twisting of the connections as detailed (above left). Please note that the indoor unit is factory charged with 50psi
of dry air or nitrogen which can be safely released to atmosphere.
Insulation
Suction lines must be insulated to a minimum thickness of 3/8”. Hot areas should be avoided when routing liquid lines and
consideration should be given to separate insulation of liquid lines to prevent heat absorption.
SPECIAL NOTES :
SLEEVE, SEAL AND WATERPROOF ANY BUILDER WORKS HOLES.
Eaton-Williams
Low Temperature DX Cassette
Page 12
QLC/ICU
Document 0412124
Issue 2.1 05/06
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