scope:

DESCRIPTION

A. Field refrigerant piping for direct expansion HVAC systems. // Field refrigerant piping and associated drain and condenser water piping for walk-in coolers and freezers, including required pipe insulation. // Field refrigerant piping and associated drain and condenser water piping for laboratory refrigerators, including required pipe insulation. // Field refrigerant piping and associated drain and condenser water piping for mortuary refrigerators, including required pipe insulation. //

B. Refrigerant piping shall be sized, selected, and designed either by the equipment manufacturer or in strict accordance with the manufacturer's published instructions. The schematic piping diagram shall show all accessories such as, stop valves, level indicators, liquid receivers, oil separator, gauges, thermostatic expansion valves, solenoid valves, moisture separators and driers to make a complete installation.

C. Definitions:

1. Refrigerating system: Combination of interconnected refrigerant-containing parts constituting one closed refrigeration circuit in which a refrigerant is circulated for the purpose of extracting heat.

a. Low side means the parts of a refrigerating system subjected to evaporator pressure.

b. High side means the parts of a refrigerating system subjected to condenser pressure.

2. Brazed joint: A gas-tight joint obtained by the joining of metal parts with alloys which melt at temperatures higher than 449 degrees C (840 degrees F) but less than the melting temperatures of the joined parts.