Lennox KGC Series Unit Information page 36

TABLE 16 581131-01
KGC/KCC120S Fin/Tube - W & W/O Reheat
Outdoor CIRCUIT 1
Coil
Discharge Suction +
Entering
+ 10 psig
Air Temp
65°F 263
75°F 301
85°F 341
95°F 386
105°F 440
115°F 492
TABLE 17 581132-01
KGC/KCC150S Fin/Tube - W & W/O Reheat
Outdoor CIRCUIT 1
Coil
Discharge Suction +
Entering
+ 10 psig
Air Temp
65°F 281
75°F 320
85°F 364
95°F 407
105°F 456
115 °F 508
CIRCUIT 2
Discharge Suction +
5 psig + 10 psig 5 psig
125 262 132
125 304 140
123 348 146
125 394 152
130 447 156
139 499 158
CIRCUIT 2
Discharge Suction +
5 psig + 10 psig 5 psig
121 283 137
125 325 141
129 370 143
132 415 145
135 464 148
139 517 151
Charge Verification - Approach Method - AHRI Testing
(Fin/Tube Coil Continued)
1 - Using the same thermometer, compare liquid tem-
perature to outdoor ambient temperature.
Approach Temperature = Liquid temperature (at
condenser outlet) minus ambient temperature.
2 - Approach temperature should match values in
TABLE 18. An approach temperature greater than
value shown indicates an undercharge. An approach
temperature less than value shown indicates an
overcharge.
3 - The approach method is not valid for grossly over
or undercharged systems. Use TABLE 14 to TABLE
17 as a guide for typical operating pressures.
APPROACH TEMPERATURE - Fin/Tube - TXV
Unit
092S 7°F + 1 (3.9°C + 0.5)
102S
5°F + 1 (2.8°C + 0.5)
120S 3°F + 1 (1.6°C + 0.5)
150S 1°F + 1 (0.6°C + 0.5)
Page 36
TABLE 18
Liquid Temp. Minus Ambient Temp.
1st Stage 2nd Stage
9°F + 1 (5.0°C + 0.5)
15°F + 1 (8.3°C + 0.5)
2.0°F + 1 (1.1°C + 0.5)
3°F + 1 (1.6°C + 0.5)