York YLUA0248 Series, Installation Operation & Maintenance

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JOHNSON CONTROLS
39
SECTION 4 – INSTALLATION
FORM 150.73-NM2
ISSUE DATE: 09/07/2020
4
TABLE 4 - REFRIGERANT LINE CONNECTIONS
MODEL
NUMBER TONS
SYSTEM
NUMBER
REFRIGERANT
LINE CONNECTION
SUCTION LINE LIQUID LINE
SUCTION LIQUID
COPPER
TYPE L
INCHES OD
VELOCITY
@ NOMINAL
CAPACITY
IN FPM
NOMINAL
TONS UN-
LOADED
COPPER
TYPE L
INCHES OD
0248YE 81.2
1 2.7 1.1 2-5/8 1656 13.5 1-1/8
2 2.7 1.1 2-5/8 1656 3.5 1-1/8
0278YE 84.3
1 2.7 1.1 2-5/8 1818 14.9 1-1/8
2 2.7 1.1 2-5/8 1572 13.2 1-1/8
0298YE 91.1
1 2.7 1.1 2-5/8 1812 14.9 1-1/8
2 2.7 1.1 2-5/8 1896 14.9 1-1/8
0308YE 98.5
1 2.7 1.1 2-5/8 1896 14.9 1-1/8
2 2.7 1.1 2-5/8 1896 14.9 1-1/8
0338YE 111.5
1 2.7 1.1 2-5/8 1812 14.9 1-1/8
2 2.7 1.1 2-5/8 2598 33.6 1-1/8
0408YE 131.5
1 2.7 1.1 2-5/8 2658 32.8 1-1/8
2 2.7 1.1 2-5/8 2658 32.8 1-1/8
0468YE 145.3
1 3.1 1.4 3-1/8 2790 31.3 1-3/8
2 2.7 1.1 2-5/8 1926 14.9 1-1/8
0498YE 158.3
1 3.1 1.4 3-1/8 2658 30.7 1-3/8
2 2.7 1.1 2-5/8 2656 33.1 1-1/8
Refrigerant Piping Notes
1. Based on R-410A at the nominal capacity of the unit or system, an ambient temperature of 95°F (35°C) and a suction temperature of 45°F
(7.2°C).
2. Suction line sizes were calculated based on a nominal maximum pressure drop to 3 PSI/100 ft. (20.7 kPa/30.5 m). When calculating suction
line pressure drop for a specific application, it should be noted that system capacity decreases as suction line pressure drop increases.
4. Nominal Tons (KW) Unloaded is based on one compressor (per system) operating at design conditions.
5. Based on minimum compressor staging for the given pipe size, a double suction riser should be used to ensure proper oil return to the com-
pressor on all vertical suction risers. Oil returning up the riser moves up the inner surface of the pipe and depends on the mass velocity of
the refrigerant vapor at the wall surface to move the oil up the vertical rise.
6. Hot gas bypass lines are typically 7/8” for lines up to 40 feet and 1-1/8” for lines over 40 feet in length (12 meters). The field connections sizes
are 7/8” for the optional factory mounted hot gas bypass valve. Note: Hot gas bypass is only available for refrigerant system number 1.
7. For more information, please refer to either the York DX Piping Guide (Form 050.40-ES2) or the ASHRAE Refrigertion Handbook.