7
FIGURE 3
Pipe Joining
installation
6.2 REFRIGERATION PIPING
Installation design must conform to all local and national codes,
laws and regulations applying to the site of installation. In addition,
safety codes for mechanical refrigeration, IIAR-2, ANSI/ASHRAE
Std. 15, and ASME B31.5, should be followed as a guide to safe
installation and operation practice.
Refrigerant line sizes, piping support, and piping techniques should
be obtained from published recognized refrigeration standards.
Under no circumstances should the refrigerant connection size
of the unit be used as the basis for sizing the lines.
For aluminum flange connections see Figure 4 for final assembly
drawing.
IMPORTANT
—The STC units have not been designed to carry
the weight of any external piping or valves. Improper support
of external piping and valves may result in unit breakage and
refrigerant leakage.
The horizontal suction line should slope away from the unit. Vertical
suction risers on halocarbon systems require a properly sized “P”
trap at the foot of the riser for proper oil return, and thermostatic
expansion valve operation.
