10-2014 gForce User Manual ● 17
mm) for every ten (10) feet (3 m) of line length. Discharge lines do not require
insulation but due to the high temperatures of the refrigerant inside the line, the pipes
may be insulated to protect against burns to individuals near or around the lines.
2.7.3 Liquid Lines
Liquid line size is determined by pressure drop and velocity. The liquid line pressure
drop should not exceed 9 PSI (62 kPa) for R-410A. The recommended gas velocity
should be between 200 and 300 FPM (1 to 1.5 m/sec). To avoid excessive liquid line
pressure drop, the air cooled condenser should be located above or at the same level as
the evaporator. Condenser installation more than ten (10) feet (3.1 m) below the
evaporator is not recommended. Insulation of liquid lines is not required but can be
useful in preventing condensation from forming and to avoid flashing on long pipe runs.
2.7.4 Connection Sizes, Air Cooled Units
* D=Downflow U=Upflow
Note:
Field connections at the indoor evaporator and remote condenser
or condensing unit will not necessarily be the same as the field pipe size
required. In some cases these will vary significantly.
To Next Page
Loading...
