ICUS CONDENSING UNIT INSTALLATION MANUAL
Jan 09:F\Qualitair Eng\Icu\Manuals\0412118S
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7. REFRIGERANT PIPE CONNECTIONS
Figure 7.1
– Refrigerant Pipe Connections
7.1
Expansion Device
ICUS Cooling Only Units DO NOT HAVE an expansion device as this is supplied with the indoor unit.
7.2
Pipe Installation
Run the suction and liquid lines in appropriately sized refrigeration copper tubing, using the detailed
tables on pages 11 & 12 of this manual as a guide. When calculating the effective run take into account
any bends or oil traps as described in table 7.1 on page 12.
A filter drier and site glass 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 7.1 above. Ensure the refrigerant lines are adequately supported using refrigerant pipe
clips
7.3
Unit Connections
The ICUS unit connections are terminated in male flare connections as detailed in the tables in Section 5,
page 7, of this manual. Place flare nuts onto the copper tube before preparing the tube with a flaring
tool (7.1C). 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 7.1B above.
7.4
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!
IT IS RECOMMENDED THAT A FILTER / DRIER IS FITTED IN THE REFRIGERATION CIRCUIT.
7.1B
7.1C
