York LEU360 Manuel d'utilisateur télécharger pdf (Page 9)

Model

Designation

Nominal

Capacity

(Tons)

Refrigerant

Flow Rate

(Lbs./Min.)

Type L

Copper Tubing

(Inches, O.D.)

Pressure Drop

Friction

(PSI/100 Ft.)

Vertical

Rise

(PSI/Ft.)

HCA300 25 75

7/8

1-1/8

5.2

1.5

0.50

HCA360 30 90

7/8

1-1/8

7.4

2.1

0.50

Based on Refrigerant-22 at the nominal capacity of the unit (or system), a liquid temperature of 105°F and a suction temperature of 40°F.

These friction losses do not include any allowances for a strainer, filter-drier, solenoid valve, isolation valve or fittings.

The total pressure drop of the unit (or system) for both friction and vertical rise must not exceed 40 PSI. If the pressure drop exceeds 40 PSI, the liquid refrigerant could flash before it reaches

the expansion valve. This flashing will not only cause erratic valve operation and poor system performance, but could also damage the expansion valve.

TABLE 6 - LIQUID LINES

TABLE 7 -

REFRIGERANT-22 LINE CHARGE

Liquid Line

Inches, O.D.

7/8 0.236 lb./ft.

1-1//8 0.403 lb./ft.

Suction Line

Inches, O.D.

1-5/8 0.019 lb./ft.

2-1/8 0.033 lb./ft.

2-5/8 0.050 lb./ft.

3-1/2 0.072 lb./ft.

NOTE: Add the operating charge of the HCA unit, the evaporator coil and the refrigerant lines to determine the total refrigerant charge of the system.

Charges are based on 40°F suction temperature and a 105°F liquid temperature.

Type “L” copper tubing.

550.13-N3Y

Unitary Products Group 9

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York LEU360 Manuel d'utilisateur Page 9

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