York MILLENNIUM YCUL0016SC, Сборка, установка, эксплуатация и обслуживание

Страница: 13 / 172

YORK INTERNATIONAL
FORM 150.63-NM1
13
1
suction riser should be used for listed pipe sizes to pro-
vide adequate oil return at reduced loads. The calculated
information was based on maintaining a minimum of
1000 fpm (5.08 m/s) refrigerant vapor velocity.
Condenser Below Evaporator
When the condensing unit is located below the evapo-
rator, the liquid line must be designed for both friction
loss and static head loss due the vertical rise. The value
of static head loss of 5 psi/ft.(3.4 kPa/30 cm) must be
added to the friction loss pressure drop in addition to
all pressure drops due to driers, valves, etc.
OIL TRAPS
All suction lines with a vertical rise exceeding 3 feet
(.91 meters) should have a “P” trap at the bottom and
top (inverted) of the riser. Suction lines with a vertical
rise exceeding 25 feet (7.6 meters) should be trapped
every 15 feet (4.6 meters).
REFRIGERANT CHARGE
The condensing unit is charged with 6 lbs. (2.7 kg) of
R-22 for a holding charge. The remaining operating
charge for the condensing unit, evaporator coil, and
refrigerant piping must be “weighed-in” after all refrig-
erant piping is installed, leak checked, and evacuated.
Final adjustment of refrigerant charge should be veri-
fied by subcooling values (refer to section on Pre-
Startup for checking subcooling). See Table 3 for Re-
frigerant Line Charges.
FILTER DRIERS
Liquid line filter driers and sight glass is factory sup-
plied for field installation on each refrigerant system.
REFRIGERANT PIPING REFERENCE
For more details, refer to ASHRAE Refrigeration Hand-
book, Chapter 2.
TABLE 1 – FITTING EQUIVALENT LENGTHS
*COPPER FITTING EQUIVALENT LENGTHS
LINE SIZE O.D. SHORT-RADIUS ELL LONG-RADIUS ELL
3/4" (19mm) 6.5 ft. (2m) 4.5 ft. (1.4m)
7/8" (22mm) 7.8 ft. (2.4m) 5.3 ft. (1.6m)
1-1/8" (29mm) 2.7 ft. (.8m) 1.9 ft. (.6m)
1-3/8" (35mm) 3.2 ft. (1m) 2.2 ft. (.7m)
1-5/8" (41mm) 3.8 ft. (1.2m) 2.6 ft. (8m)
2-1/8" (54mm) 5.2 ft. (1.6m) 3.4 ft. (1m)
2-5/8" (67mm) 6.5 ft. (20m) 4.2 ft. (1.3m)
* Pressure drops or equivalent length values are approximate. If
more precise value is desired, consult ASHRAE Refrigerant
Handbook.
TABLE 2 – MISCELLANEOUS LIQUID LINE
PRESSURE DROPS
*MISCELLANEOUS LIQUID LINE PRESSURE
SOLENOID VALVE 2 TO 3 PSI (13.8 TO 20.7 kPa)
FILTER/DRIER 2 TO 3 PSI (13.8 TO 20.7 kPa)
SIGHT GLASS 0.5 PSI (3.4 kPa)
TABLE 3 – REFRIGERANT PIPING CHARGES
REFRIGERANT LINE CHARGES
SUCTION LINES LIQUID LINES
1-3/8" (35mm) .2 oz./ft. (6 grams/30cm) 3/4" (19mm) 2.7 oz./ft. (76 grams/30cm)
1-5/8" (41mm) .3 oz./ft. (8 grams/30 cm) 7/8" (22mm) 3.7 oz./ft. (105 grams/30cm)
2-1/8" (54mm) .6 oz/ft. (17 grams/30cm) 1-1/8" (29mm) 6.2 oz./ft. (176 grams/30cm)
2-5/8" (67mm) .8 oz./ft. (23 grams/30cm) 1-3/8" (35mm) 8.6 oz./ft. (244 grams/30cm)
TABLE 4 – REFRIGERANT LINE CONNECTIONS
YCUL REFRIGERANT LINE CONNECTIONS
MODEL SUCTION
LIQUID
YCUL0016 1-3/8" (35mm) 7/8" (22mm)
YCUL0026 1-5/8" (41mm) 7/8" (22mm)
YCUL0030 2-1/8" (54mm) 7/8" (22mm)
YCUL0036 2-1/8" (54mm) 7/8" (22mm)
YCUL0040 2-1/8" (54mm) 7/8" (22mm)
YCUL0046 2-1/8" (54mm) 7/8" (22mm)
YCUL0056 2-1/8" (54mm) 7/8" (22mm)
YCUL0060 2-1/8" (54mm) 7/8" (22mm)
YCUL0066 2-1/8" (54mm) 7/8" (22mm)
YCUL0076 2-1/8" (54mm) 1-1/8" (29mm)
YCUL0080 2-1/8" (54mm) 1-1/8" (29mm)
YCUL0086 2-1/8" (54mm) 1-1/8" (29mm)
YCUL0090 2-5/8" (67mm) 1-1/8" (29mm)