York YLUA Series Operation Manual page 12

Selection Data - continued
TABLE 4 – REFRIGERANT LINE CONNECTIONS
Model
Tons
Number
0248YE 81.3
0278YE 84.3
0298YE 91.1
0308YE 98.5
0338YE 111.5
0408YE 131.5
0468YE 145.3
158.3
0498YE
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 compres-
sor 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 Johnson Controls DX Piping Guide (Form 050.40-ES2) or the ASHRAE Refrigertion Handbook.
12
Refrigerant Line
Connection
System
Number
Suction
1 2.7
2 2.7
1 2.7
2 2.7
1 2.7
2 2.7
1 2.7
2 2.7
1 2.7
2 2.7
1 2.7
2 2.7
1 3.1
2 2.7
1 3.1
2 2.7
Suction Line
Velocity @
Copper
Type L
Capacity in
inches OD
Liquid
1.1 2-5/8
1.1 2-5/8
1.1 2-5/8
1.1 2-5/8
1.1 2-5/8
1.1 2-5/8
1.1 2-5/8
1.1 2-5/8
1.1 2-5/8
1.1 2-5/8
1.1 2-5/8
1.1 2-5/8
1.4 3-1/8
1.1 2-5/8
1.4 3-1/8
1.1 2-5/8
FORM 150.63-EG4 (1012)
Liquid Line
Nominal
Nominal
Tons
Unloaded
FPM
1656 13.5
1656 3.5
1818 14.9
1572 13.2
1812 14.9
1896 14.9
1896 14.9
1896 14.9
1812 14.9
2598 33.6
2658 32.8
2658 32.8
2790 31.3
1926 14.9
2658 30.7
2556 33.1
JOHNSON CONTROLS
Copper
Type L
inches OD
1-1/8
1-1/8
1-1/8
1-1/8
1-1/8
1-1/8
1-1/8
1-1/8
1-1/8
1-1/8
1-1/8
1-1/8
1-3/8
1-1/8
1-3/8
1-1/8