Suction Lines; Liquid Lines; Refrigerant Line Charge - York SUNLINE 2000 H4CE120 Installation Manual

TABLE 4 - SUCTION LINES
Unit Size
(MBH)
(lbs. / kg. per min.)
090
120
1
All horizontal suction lines should be pitched at least 1 inch (25mm) every 20 feet (6m) in the direction of the refrigerant flow to aid the return of oil to the compressor.
2
Every vertical suction riser greater than 3 feet (1m) in height should have a "P" trap at the bottom to facilitate the return of oil to the compressor. Use short radius fittings for these traps.
3
Based on Refrigerant-22 at the nominal capacity of the condensing unit, a suction temperature of 40°F (5°C) and a liquid temperature of 105°F (40°C).
4
Although suction lines should be sized for a friction loss equivalent to a 2°F (1.1°C) change in saturation temperature (or approximately 3 psi [21 kPa]), sizing the lines for the proper return
of oil is more important.
5
These friction losses do not include any allowances for valves or fittings.
TABLE 5 - LIQUID LINES
Refrigerant
Unit Size
Flow Rate
(MBH)
(lbs. / kg. per min.)
090 22.5 / 10.2
120 30.0 / 13.6
1
Based on Refrigerant-22 at the nominal capacity of the condensing unit, a liquid temperature of 105°F (40°C) and a suction temperature of 40°F (5°C).
2
These friction losses do not include any allowances for a strainer, filter-drier, solenoid valve, isolation valve or fittings.
3
The total pressure drop of the liquid line for both friction and vertical rise must not exceed 40 PSI (278 kPa). If the pressure drop exceeds 40 PSI (278 kPa), the liquid refrigerant could flash
before it reaches the expansion valve. This flashing will not only cause erratic valve operation and poor system performance, but could also damage the expansion valve.
TABLE 6 - REFRIGERANT-22 LINE CHARGE
Refrigerant Outside Diameter
Circuit (in. / mm.)
1/2 / 13
2
Liquid Line 5/8 / 16
3/4 / 19
1-1/8 / 29
2
Suction Line 1-3/8 / 35
1-5/8 / 41
8
1,2
Refrigerant Type L
3
Flow Rate Copper Tubing
(in. / mm O.D.)
1-1/8 / 28.5
22.5 / 10.2 1-3/8 / 35.0
1-5/8 / 41.3
1-1/8 / 28.5
30.0 / 13.6 1-3/8 / 35.0
1-5/8 / 41.3
Type L
1
Copper Tubing
(in. / mm O.D.)
1/2 / 12.7
5/8 / 15.8
5/8 / 15.8
3/4 / 19.0
1
Line Charge
(lbs. / ft. - kg / m)
.070 / .032
.113 / .051
.167 / .076
.009 - .004
.013 - .006
.019 - .007
Refrigerant Gas
Velocity
(ft. / m per min.)
2450 / 745
1680 / 511
1140 / 346
3500 / 1064
2280 / 693
1560 / 474
Refrigerant Gas
Velocity
(ft. / m per min.)
(PSI/100 Ft.) (kPa / 30.5m)
300 / 91 11.0
190 / 58 3.5
250 / 76 5.8
170 / 52 2.3
NOTE: Add the operating charge of the condensing unit, the evaporator coil and
the refrigerant lines to determine the total refrigerant charge of the system.
1
Charges are based on 40°F (5°C) suction temperature and a 105°F (40°C) liquid temperature.
2
Type "L" copper tubing.
035-15406-002-A-0504
4,5
Friction Loss
(PSI/100 Ft.) (kPa / 30.5m)
4.3
1.6
0.7
8.0
2.8
1.2
3
Pressure Drop
2
Friction Vertical Rise
(PSI/Ft.)
77
0.5
24
40
0.5
16
Unitary Products Group
30
11
5
56
20
8
kPa / .3m)
3.5
3.5