Quietside QSCU-361 Installation & Service Manual - Unit Installation (Cont)
Step 3
Refrigerant Line Set Piping
Use only refrigerant grade copper tubing, ensure line set sizing follows the published table.
Interconnecting line set between the Outdoor unit and the Indoor unit, must have the Suction refrigerant line
insulated with a minimum of 3/8" thick armaflex or similar insulation.
INSTALL A LIQUID LINE SIGHT GLASS & R410A FILTER DRIER IN THE SYSTEM
Run the line set to the Indoor unit, avoid tight bends and kinking the lines.
Quietside does not recommend the use of "Street Elbows" to make bends, this is due the pressure drop
incurred with these.
Always use long radius elbows or use a tube bender to ensure refrigerant flow in the system.
Unit
Max Line Set Run
Suction
Liquid
QSCU-361
5/8"
3/8"
QSCU-481
3/4"
3/8"
QSCU-601
7/8"
1/2"
Line Set sizing must be as shown in the table, maximum line length cannot be increased by altering line sizes.
When placing Outdoor unit below the Indoor unit
a trap is required every 20ft to ensure correct oil
return to the condensing unit.
Unit Installation (Cont)
Max Vertical Lift
Installation and Maintenance Manual
100 Feet
50 Feet
ONLY MATCH WITH INDOOR UNITS USING TXV’S AS THE EXPANSION DEVICE
100 Feet
50 Feet
100 Feet
50 Feet
Page 5