ICC / ICU SYSTEM INSTALLATION MANUAL
January2005: E\Manuals\Others\Qualitair\ICC\0412115B
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10. REFRIGERANT PIPE CONNECTIONS
9.1C
9.1B
Figure 9.1 – Refrigerant Pipe Connections
10.1 Pipe Installation
Run the suction and liquid lines in appropriately sized refrigeration copper tubing as per the detailed
tables in Section 11.2 of this installation manual. When calculating the effective run take into account
any bends or oil traps as described in table.
A filter drier should be fitted in the liquid line.
Where the vertical separation exceeds 3 metres, oil traps must be fitted at half the vertical distance
as shown on Figure 9.1 above. Ensure the refrigerant lines are adequately supported using
refrigerant pipe clips.
10.2 Unit Connections
The outdoor unit connections are terminated in male flare connections as detailed in tables 7.3 and
7.4 of this manual; indoor connections are plain copper tails. Place flare nuts onto the copper tube
before preparing the tube with a flaring tool (9.1C). 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 in figure
9.1B above. Please note that the indoor unit is factory charged with 50psi of dry air or nitrogen which
can be safely released to atmosphere.
10.3 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, where
required, to prevent heat absorption.
SPECIAL NOTE
SLEEVE, SEAL AND WATERPROOF ANY BUILDER WORKS HOLES !
