Lennox LCH060H4E

Page 44
TABLE 9
LG/LC 048S/H NORMAL OPERATING PRESSURES
Outdoor Coil
Entering Air Temp
Discharge
+
10 psig
Suction + 5
psig
655 F 258 126
755 F 299 135
855 F 343 143
955 F 389 147
1055 F 440 154
1155 F 495 157
TABLE 10
LG/LC 048S/H REHEAT NORMAL
OPERATING PRESSURES
Outdoor Coil
Entering Air Temp
Discharge
+
10 psig
Suction + 5
psig
655 F 260 139
755 F 299 142
855 F 341 145
955 F 389 148
1055 F 440 151
1155 F 496 154
TABLE 11
LG/LC 060S/H NORMAL OPERATING PRESSURES
Outdoor Coil
Entering Air Temp
Discharge
+
10 psig
Suction + 5
psig
655 F 253 135
755 F 291 138
855 F 333 141
955 F 379 145
1055 F 428 148
1155 F 481 151
TABLE 12
LG/LC 060S/H REHEAT NORMAL
OPERATING PRESSURES
Outdoor Coil
Entering Air Temp
Discharge
+
10 psig
Suction + 5
psig
655 F 263 139
755 F 300 142
855 F 339 143
955 F 383 146
1055 F 431 148
1155 F 483 151
TABLE 13
LGH072H NORMAL OPERATING PRESSURES
Outdoor Coil
Entering Air Temp
Discharge
+
10 psig
Suction + 5
psig
655 F 271 136
755 F 312 139
855 F 357 141
955 F 405 144
1055 F 458 147
1155 F 515 151
TABLE 14
LG072H REHEAT NORMAL OPERATING PRESSURES
Outdoor Coil
Entering Air Temp
Discharge
+
10 psig
Suction + 5
psig
655 F 272 137
755 F 312 139
855 F 356 140
955 F 403 142
1055 F 453 145
1155 F 507 148
TABLE 15
LG/LC 074H STD. & REHEAT NORMAL OPERATING
PRESSURES
Outdoor Coil
Entering Air Temp
Discharge
+
10 psig
Suction + 5
psig
655 F 287 139
755 F 325 141
855 F 366 143
955 F 411 146
1055 F 460 149
1155 F 513 152
B-Charge Verification - Approach Method - AHRI Testing
1- Using the same thermometer, compare liquid tempera
ture to outdoor ambient temperature.
Approach Temperature = Liquid temperature (at con
denser outlet) minus ambient temperature.
2- Approach temperature should match values in table
16. An approach temperature greater than value
shown indicates an undercharge. An approach tem
perature less than value shown indicates an over
charge.
3- The approach method is not valid for grossly over or
undercharged systems. Use tables 7 through 15 as a
guide for typical operating pressures.
TABLE 16
APPROACH TEMPERATURE
LGH/LCH Unit
Liquid Temp. Minus
Ambient Temp.
036S & H Std.; 036S & H Reheat;
048S & H Std.;
072H Std.; 074H Std.
6°F + 1 (3.3°C + 0.5)
048S & H Reheat;
072H Reheat; 074H Reheat
7°F + 1 (3.9°C + 0.5)
060S & H Std.; 060S/H Reheat 8°F + 1 (4.4°C + 0.5)
C-Refrigerant Charge and Check - All-Aluminum Coil
WARNING-Do not exceed nameplate charge under any
condition.
This unit is factory charged and should require no further
adjustment. If the system requires additional refrigerant, re
claim the charge, evacuate the system, and add required
nameplate charge.
NOTE - System charging is not recommended below 60_F
(15_C). In temperatures below 60_F (15_C), the charge
must be weighed into the system.