Page 29
TABLE 14 580239-02
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
65
°
F
259
137
283
139
75
°
F
297
140
321
142
85
°
F
338
143
360
144
95
°
F
382
146
406
146
105
°
F
431
149
453
148
115
°
F
486
151
505
151
TABLE 15 580240-02
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
65
°
F
266
134
281
139
75
°
F
303
137
310
141
85
°
F
344
140
358
143
95
°
F
391
143
403
145
105
°
F
443
146
450
146
115
°
F
499
149
497
148
TABLE 16 580530-06
LGH/LCH150H W & W/O Hot Gas
Reheat-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
65°F
267
130
278
130
75°F
307
132
320
132
85°F
351
136
367
135
95°F
400
139
414
137
105°F
451
142
467
140
115°F
508
145
523
143
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)
150H Std. &
Reheat
4°F + 1 (2.2°C + 0.5)
5°F + 1 (2.8°C + 0.5)
092 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)
120 Reheat
6°F + 1 (3.3°C + 0.5)
8°F + 1 (4.4°C + 0.5)
