Figure i – Thermo Pride Air Handlers ECM Blower 13/14 SEER (AH2) User Manual
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TUBING INSTALLATION
The compressor oil is constantly pumped through the refrigerant lines in normal operation of an air
conditioning system. To ensure proper lubrication of the compressor by avoiding oil accumulation at
undesirable points in the system, follow the guidelines listed below:
1. No traps in the suction line are necessary if the outdoor condensing unit is level with the indoor
evaporator coil or the indoor evaporator coil is 4 feet or less lower then the outdoor condensing unit.
Any horizontal runs of suction line should have minimum 1/2" pitch for every 10 feet of line towards
the outdoor condensing unit. See Figure I.
Figure I.
2. A trap is necessary in the suction line at the indoor evaporator coil if the indoor evaporator coil is
more than 4 feet below the outdoor condensing unit.
Figure J.