Table 4 - Refrigerant Line Connections - York YLUA0248 Series Installation Operation & Maintenance

FORM 150.73-NM2
ISSUE DATE: 09/07/2020

TABLE 4 - REFRIGERANT LINE CONNECTIONS

MODEL SYSTEM
TONS
NUMBER NUMBER
1
0248YE
81.2
2
1
0278YE
84.3
2
1
0298YE 91.1
2
1
0308YE 98.5
2
1
0338YE 111.5
2
1
0408YE 131.5
2
1
0468YE
145.3
2
1
0498YE 158.3
2
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.
JOHNSON CONTROLS
REFRIGERANT
LINE CONNECTION
COPPER
TYPE L
SUCTION LIQUID
INCHES OD
2.7 1.1
2.7 1.1
2.7 1.1
2.7 1.1
2.7 1.1
2.7 1.1
2.7 1.1
2.7 1.1
2.7 1.1
2.7 1.1
2.7 1.1
2.7 1.1
3.1 1.4
2.7 1.1
3.1 1.4
2.7 1.1
SUCTION LINE
VELOCITY
@ NOMINAL
CAPACITY
IN FPM
2-5/8 1656
2-5/8 1656
2-5/8 1818
2-5/8 1572
2-5/8 1812
2-5/8 1896
2-5/8 1896
2-5/8 1896
2-5/8 1812
2-5/8 2598
2-5/8 2658
2-5/8 2658
3-1/8 2790
2-5/8 1926
3-1/8 2658
2-5/8 2656
SECTION 4 – INSTALLATION
LIQUID LINE
NOMINAL COPPER
TONS UN- TYPE L
LOADED INCHES OD
13.5 1-1/8
3.5 1-1/8
14.9 1-1/8
13.2 1-1/8
14.9 1-1/8
14.9 1-1/8
14.9 1-1/8
14.9 1-1/8
14.9 1-1/8
33.6 1-1/8
32.8 1-1/8
32.8 1-1/8
31.3 1-3/8
14.9 1-1/8
30.7 1-3/8
33.1 1-1/8
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