York YLUA Series User Manual

12 JOHNSON CONTROLS
FORM 150.63-EG4 (1012)
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 specic 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 eld 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.
Tons
Suction Line Liquid Line
Suction Liquid
0248YE
81.3
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 2556 33.1 1-1/8
TABLE 4 – REFRIGERANT LINE CONNECTIONS
Model
Number
System
Number
Refrigerant Line
Connection
Copper
Type L
inches OD
Velocity @
Nominal
Capacity in
FPM
Nominal
Tons
Unloaded
Copper
Type L
inches OD
Selection Data - continued
Refrigerant Piping Notes

York YLUA Series Specifications

General

Brand	York
Model	YLUA Series
Category	Chiller
Language	English