Thermo Pride Air Handlers ECM Blower 13/14 SEER (AH2) - Manual (Page 19)

17
NOTE: Multiple suction line traps are recommended for longer or multiple suction lines. See Figure J.
An inverted trap should be installed on the horizontal suction line near the evaporator coil to prevent
liquid flood back to the compressor (See Figure K.) if the indoor evaporator coil is located 10’ or more
above the condensing unit.
Figure K.
A gradual loop in the tubing can be constructed to take up the excess tubing if you find that too much
tubing has been brought onto a job. Such a loop MUST be kept in a horizontal (flat) plane to avoid
trapping the oil.
Refrigerant lines should be inserted into a suitable conduit or raceway when the lines are to be buried
between the building and the outdoor condensing unit. The lines must be provided with sufficient
protection and support to prevent damage when installed above ground.
When making "on the job" tubing, a solder of 95% tin, 5% antimony or any of the silver solders such as
SilFos, Phos-Copper, Easy-Flo 35 or 45, should be used. No attempt will be made here to instruct proper
soldering or brazing technique but it is necessary that the installer be properly instructed in accordance
with good existing practices.
All joints and fittings must be properly leak tested as per EPA guidelines after “on the job” tubing has
been made up. The line set and the evaporator coil must be evacuated to 29.96” Hg (1000 microns) or
lower when all joints and fittings are leak free. The service valves on the condenser may then be opened to
release the refrigerant to the system. Verify proper system performance. See condensing unit manual for
additional performance data.