Heat Controller R-410A B. Typical Piping Recommendations, Refrigerant Piping

7.Insulate the liquid line whenever the heat pick-up or transfer can affect the sub-cool- ing.

8.Care should be taken to avoid transmission of noise or vibration to building structure.

FIGURE 6

SUCTION LINE SYSTEM CAPACITY LOSS IN PERCENT PER 100 FEET EQUIVALENT LENGTH (TYPE L COPPER TUBING)

NOTES:

1.The minimum velocity line (700 fpm) is recommended for cooling only units with verti- cal or horizontal run refrigerant lines.

2.For suction pressure drop (PSIG), multiply percent (%) loss by 1.18.

B. TYPICAL PIPING RECOMMENDATIONS

REFRIGERANT PIPING:

The following will be of help in accomplishing a successful installation.

1.Size liquid line for no more than 10°F loss which corresponds to approximately 50 PSIG pressure drop.

2.Size suction lines for no more than 2°F loss which corresponds to approximately 5 PSIG pressure drop.

3.Install sight glass, filter drier and solenoid valve in liquid line adjacent to evaporator. Filter drier should be between the condensing unit and sight glass.

4.Pitch all horizontal suction lines downward in the direction of flow. (1⁄2" to 10 ft. run)

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