Lennox LCH036 Installation Instructions Manual page 79

TABLE 14
LGH/LCH120H Fin/Tube - TXV
CIRCUIT 1
Outdoor
Dis­
Coil
Suction
charge
Entering
+10 psig +5 psig
Air Temp
655 F 259
755 F 297
855 F 338
955 F 382
1055 F 431
1155 F 486
TABLE 15
LGH/LCH120H Fin/Tube Hot Gas Reheat - TXV
CIRCUIT 1
Outdoor
Dis­
Coil
charge Suction
Entering
+5 psig
+10 psig
Air Temp
655 F 266
755 F 303
855 F 344
955 F 391
1055 F 443
1155 F 499
TABLE 16
LGH/LCH150S Fin/Tube Hot Gas Reheat - TXV
CIRCUIT 1
Outdoor
Dis­
Coil
Suction
charge
Entering
+10 psig +5 psig
Air Temp
655 F 280
755 F 319
855 F 360
955 F 407
1055 F 455
1155 F 510
CIRCUIT 2
Dis­
Suction
charge
+10 psig +5 psig
137 283 139
140 321 142
143 360 144
146 406 146
149 453 148
151 505 151
CIRCUIT 2
Dis­
charge Suction
+5 psig
+10 psig
134 281 139
137 310 141
140 358 143
143 403 145
146 450 146
149 497 148
CIRCUIT 2
Dis­
Suction
charge
+10 psig +5 psig
136 296 136
141 335 141
142 376 143
144 420 144
147 466 147
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.
APPROACH TEMPERATURE - Fin/Tube - TXV
Unit
092 6°F + 1 (3.3°C + 0.5)
102 6°F + 1 (3.3°C + 0.5)
120 6°F + 1 (3.3°C + 0.5)
092 Reheat
120 Reheat 6°F + 1 (3.3°C + 0.5)
150 Reheat
102 Reheat 6°F + 1 (3.3°C + 0.5)
Page 29
TABLE 17
Liquid Temp. Minus Ambient Temp.
1st Stage 2nd Stage
7°F + 1 (3.9°C + 0.5)
9°F + 1 (5.0°C + 0.5)
10°F + 1 (5.6°C + 0.5)
8°F + 1 (4.4°C + 0.5)
9°F + 1 (5.0°C + 0.5)