York H3CE180 - Lock Out Reset and Second Stage Cooling; Lock Out Reset Procedures; Second Stage of Cooling

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.
1Charges are based on 40
°
F suction temperature and a 105
°
F liquid temperature.
2Type “L” copper tubing.
Model
Designation
Nominal
Capacity
(Tons)
Refrigerant
Flow Rate
1
(Lbs./Min.)
Type L
Copper Tubing
(Inches O.D.)
Pressure Drop
3
Friction
2
(PSI/100 Ft.)
Ver tical
Rise
(PSI/Ft.)
180 Mbh 15 45
3/4
7/8
4.7
2.2
0.5
240 Mbh 20 60
3/4
7/8
8.0
3.5
0.5
1Based on Refrigerant-22 at the nominal capacity of the condensing unit, a liquid temperature of 105
°
F and a suction temperature of 40
°
F.
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. If the pressure drop exceeds 40 PSI, 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 5
- LIQUID LINES
Liquid Line
2
Inches, O.D.
5/8 0.113 lb./ft.
7/8 0.237 lb./ft.
Suction Line
2
Inches, O.D.
1-5/8 0.018 lb./ft.
2-1/8 0.031 lb./ft.
2-5/8 0.047 lb./ft.
TABLE 6
-
REFRIGERANT-22 LINE CHARGE
1
Compressor Suction Ambient Temperature Enterin
g
Condenser Coil
(
°F
)
Model 65758595105115
Pressure
(
psi
g)
Saturated
Temp
(
°F
)
MBH
1
kW
2
MBH kW MBH kW MBH kW MBH kW MBH kW
54.9 30 165 12.3 157 13.4 150 14.8 142 16.3 134 18.1 126 19.9
61.6 35 181 12.5 172 13.6 164 15.0 156 16.5 147 18.3 138 20.2
180 68.5 40 196 12.7 188 13.9 179 15.3 170 16.7 160 18.6 151 20.4
76.0 45 212 12.9 204 14.1 194 15.5 184 17.0 174 18.9 164 20.8
84.0 50 231 13.2 220 14.3 210 15.8 199 17.3 188 19.1 177 21.0
54.9 30 228 17.3 217 19.2 206 21.1 195 23.4 183 25.9 172 28.5
61.6 35 248 17.7 237 19.6 225 21.5 213 23.8 200 26.4 188 29.0
240 68.5 40 269 18.1 257 20 244 21.9 231 24.3 218 26.9 204 29.6
76.0 45 291 18.5 277 20.5 264 22.4 250 24.8 236 27.5 222 30.3
84.0 50 313 19.0 299 21 284 23.0 269 25.3 254 28.1 239 30.9
1. Capacities are
g
ross ratin
g
s.
2. Pow er is for the condensin
g
unit onl
y
.
TABLE 7
- CONDENSING UNIT COOLING CAPACITIES
AND POWER REQUIREMENTS
550.23-N6Y
8 Unitary Products Group