Charging The Unit - Trane 4TTL6018A1000A Installation And Operation Manual

Charging the Unit

Table 26. Stabilize the system
1. Wait 20 minutes for the system condition to stabilize between
adjustments.
Note: When the Liquid Line Temperature and Gage Pressure
approximately match the chart, the system is properly
charged.
2. Remove gauges.
3. Replace service port caps to prevent leaks. Tighten finger tight
plus an additional 1/4 turn.
Table 27. Proper Gage Pressure
Measure the liquid line temperature and pressure at the outdoor unit's
service valve.
Measure Liquid Line Temp =
Liquid Gage Pressure = ________________________ PSI
Final Subcooling Value = ________________________ °F
Table 28. Verify Performance
4. Refer to System Pressure Curves at the end of the document to
verify typical performance.
18-BC98D1-1G-EN
________________________°F
20 MIN.
PRESSURE CURVE SAMPLE
Cooling @ 1450 SCFM Heating @ 1350 SCFM
550 500
INDOOR ENTERING INDOOR ENTERING
WET BULB CURVES (2) DRY BULB CURVES
500 TOP TO BOTTOM TOP TO BOTTOM
450
71, 67, 63 AND 59 DEG F. 80, 70, AND 60 DEG F.
450
400
400
350
350
(4) (3)
300
300
250
250
(1)
200 200
40 60 80 100 120 -5 5 15 25
OUTDOOR TEMPERATURE (Degree F)
170
INDOOR ENTERING 140
INDOOR ENTERING
165 WET BULB CURVES
DRY BULB CURVES
130
TOP TO BOTTOM
160 TOP TO BOTTOM
71, 67, 63 AND 59 DEG F.
120
80, 70, AND 60 DEG F.
(2)
155
110
150
100
145
(5)
(3)
90
140
80
135
70
130
125 60
120 50
115
40
(1)
110
30
40 60 80 100 120
-5 5 15 25
107 °F
35 45 55 65
35 45 55 65
23