Page 29
TABLE 14
LGH/LCH120H Fin/Tube - TXV
Outdoor
Coil
Entering
Air Temp
CIRCUIT 1 CIRCUIT 2
Dis
charge
+
10 psig
Suction
+
5 psig
Dis
charge
+
10 psig
Suction
+
5 psig
655 F 259 137 283 139
755 F 297 140 321 142
855 F 338 143 360 144
955 F 382 146 406 146
1055 F 431 149 453 148
1155 F 486 151 505 151
TABLE 15
LGH/LCH120H Fin/Tube Hot Gas Reheat - TXV
Outdoor
Coil
Entering
Air Temp
CIRCUIT 1 CIRCUIT 2
Dis
charge
+
10 psig
Suction
+
5 psig
Dis
charge
+
10 psig
Suction
+
5 psig
655 F 266 134 281 139
755 F 303 137 310 141
855 F 344 140 358 143
955 F 391 143 403 145
1055 F 443 146 450 146
1155 F 499 149 497 148
TABLE 16
LGH/LCH150S Fin/Tube Hot Gas Reheat - TXV
Outdoor
Coil
Entering
Air Temp
CIRCUIT 1 CIRCUIT 2
Dis
charge
+
10 psig
Suction
+
5 psig
Dis
charge
+
10 psig
Suction
+
5 psig
655 F 280 136 296 136
755 F 319 141 335 141
855 F 360 142 376 143
955 F 407 144 420 144
1055 F 455 147 466 147
1155 F 510 150 518 150
Charge Verification - Approach Method - AHRI Testing
(Fin/Tube Coil Continued)
1- Using the same thermometer, compare liquid
temperature to outdoor ambient temperature.
Approach Temperature = Liquid temperature (at
condenser outlet) minus ambient temperature.
2- Approach temperature should match values in table
17. 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 tables 10 through 16 as
a guide for typical operating pressures.
TABLE 17
APPROACH TEMPERATURE - Fin/Tube - TXV
Unit
Liquid Temp. Minus Ambient Temp.
1st Stage 2nd Stage
092 6°F + 1 (3.3°C + 0.5) 7°F + 1 (3.9°C + 0.5)
102 6°F + 1 (3.3°C + 0.5) 9°F + 1 (5.0°C + 0.5)
120 6°F + 1 (3.3°C + 0.5) 10°F + 1 (5.6°C + 0.5)
092 Reheat
120 Reheat
150 Reheat
6°F + 1 (3.3°C + 0.5) 8°F + 1 (4.4°C + 0.5)
102 Reheat 6°F + 1 (3.3°C + 0.5) 9°F + 1 (5.0°C + 0.5)
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