Trane 4TWB3048B User Manual

18-BC85D1-2 23
STEP 8 - Verify typical performance.
Refer to System Pressure Tables in the Service
Facts to verify typical performance.
20 MIN.
STEP 7 - Stabilize the system.
1. Wait 20 minutes for the system condi-
tion to stabilize between adjustments.
Note: When the Liquid Line Temperature and
Gage Pressure approximately match the chart,
the system is properly charged.
2. Remove gages.
3. Replace service port caps to prevent
leaks. Tighten finger tight plus an ad-
ditional 1/6 turn.
(Example only - see Service Facts)
Cooling
OD ** 18 24 30 36
42 3
48 60
AH****** A18S11 A24S21 A30S21 A36S31 B42S31 C48S41 C60S51
115 510 490 515 515 540
110 480 460 485 485 510
105 450 435 455 455 480
100 425 405 425 425 450
95 390 375 395 395 420
90 1
365 350
370 4
370 390
85 340 325 335 335 365
80 315 305 320 320 345
75 290 285 300 300 320
70 275 265 280 280 300
65 255 245 260 260 280
60 235 225 225 225 260
OD ** 18 24 30 36
42
3
48 60
AH****** A18S11 A24S21 A30S21 A36S31 B42S31 C48S41 C60S51
71 154 153 154 155 154
67 146 146 147 148 146
63 138 139 139 140 137
59 131 132 133 134 130
71 149 148 150 151 150
67 141 141 143 144 142
63 134 134 136 137 134
59 127 128 129 131 126
71 145 144 147 148 146
67 2
137 137
139 4
141 138
63 130 131 133 134 131
59 123 124 127 127 123
71 141 141 144 146 144
67 134 134 137 139 136
63 127 128 131 132 128
59 120 122 124 125 121
71 138 138 141 143 141
67 131 131 134 136 133
63 124 125 128 129 126
59 117 119 122 123 118
71 135 135 139 141 138
67 128 128 132 134 131
63 121 122 125 127 123
59 114 116 119 121 116
80
70
60
Outdoor Temperature (Degree F)
100
90 1
Outdoor Size & AH
Discharge Pressure (PSIG)
Outdoor Size & AH
Suction Pressure (PSIG)
110
Indoor Wet
Bulb
(Degree F)
Outdoor
Temp.
(Degree F)
Heating
OD ** 18 24 30 36 42 48 60
AH****** A18S11 A24S21 A30S21 A36S31 B42S31 C48S41 C60S51
80 480 485 435 445 445
70 440 445 395 405 405
60 400 405 355 365 365
80 455 460 410 420 415
70 415 420 370 385 380
60 375 380 335 345 345
80 430 435 390 395 395
70 390 390 350 360 355
60 350 355 315 325 320
80 415 420 375 380 380
70 370 375 335 345 340
60 335 335 295 305 305
80 390 390 355 365 355
70 350 350 315 325 320
60 310 310 280 285 285
80 370 370 335 345 335
70 330 330 295 305 300
60 290 290 265 270 265
80 350 350 320 325 320
70 310 310 275 285 280
60 270 270 245 255 245
80 335 335 300 315 305
70 290 290 265 275 265
60 255 255 225 235 230
OD ** 18 24 30 36 42 48 60
AH****** A18S11 A24S21 A30S21 A36S31 B42S31 C48S41 C60S51
65 142 150 138 142 134
55 120 127 116 120 114
45 100 105 96 98 94
35 83 89 82 83 81
25 69 74 67 68 66
15 56 60 53 55 53
5 44 49 42 44 42
-5 35 40 32 35 33
Outdoor Size & AH
Discharge Pressure (PSIG)
Outdoor Temperature (Degree F)
Indoor
Entering
(Deg.F)
65
55
45
Outdoor Size & AH
Suction Pressure (PSIG)
Outdoor Temperature
(Degree F)
35
25
15
5
-5
PRESSURE TABLES FOR 4TWB30**
*AM4A0****** Air Handler
OUTDOOR TEMPERATURE (Degree F)
COOLING PERFORMANCE CAN BE CHECKED WHEN THE OUTDOOR TEMP IS ABOVE 65 DEG F.
TO CHECK COOLING PERFORMANCE, SELECT THE PROPER INDOOR CFM, ALLOW PRESSURES TO STABILIZE. MEASURE INDOOR WET BULB
TEMPERATURE, OUTDOOR TEMPERATURE, DISCHARGE AND SUCTION PRESSURES. ON THE PLOTS LOCATE OUTDOOR TEMPERATURE (1);
LOCATE INDOOR WET BULB (2); LOCATE MODEL OUTDOOR (3); FIND INTERSECTION BETWEEN 1, 2, & 3 . (4) FIND TARGET PRESSURE.
EXAMPLE:
(1) OUTDOOR TEMP. 90 F.
(2) INDOOR WET BULB 67 F.
(3) OD 4TWB3042 ACTUAL:
(4) DISCHARGE PRESSURE IS 370 PSIG DISCHARGE PRESSURE SHOULD BE +/- 10 PSIG OF CHART
(5) SUCTION PRESSURE IS 139 PSIG SUCTION PRESSURE SHOULD BE +/- 3 PSIG OF CHART
INTERCONNECTING LINES
GAS - 3/4" O.D.
LIQUID - 3/8" O.D.
STEP 6 - Adjust refrigerant level to attain
proper gage pressure.
Add refrigerant if the Liquid Gage Pressure
is lower than the chart value.
1. Connect gages to refrigerant bottle
and unit as illustrated.
2. Purge all hoses.
3. Open bottle.
4. Stop adding refrigerant when liquid
line temperature and Liquid Gage
Pressure matches the charging chart
Final Subcooling value.
Recover refrigerant if the Liquid Gage Pres-
sure is higher than the chart value.

Trane 4TWB3048B Specifications

General

Brand	Trane
Model	4TWB3048B
Category	Heat Pump
Language	English