Charging In Cooling Above 55°F Od; Ambient - Trane 4YCZ5036F1070B Installation And Operation Manual

Charging in Cooling above 55°F
OD Ambient
If servicing the equipment requires system evacuation,
then re-charge the system to the weight specified on
the nameplate. Verify the system subcooling using the
Subcooling Charging Table and, if necessary, adjust
the charge using the procedure below.
1. For best results — the indoor temperature should
be kept between 70°F to 80°F. Add system heat if
needed.
2. Whenever charge is removed or added, the system
must be operated for a minimum of 20 minutes to
stabilize before accurate measurements can be
made.
3. Measure Liquid Line Temperature and Refrigerant
Pressure at service valved in the compressor
compartment.
4. Locate your liquid line temperature in the left
column of the table, and the intersecting liquid line
LIQUID
TEMP
6
(°F)
55 174
60 189
65 205
70 222
75 240
80 259
85 279
90 301
95 323
100 347
105 371
110 398
115 425
120 454
125 484
From Dwg. D154557P01
18-EB41D1-1C-EN
R-410A REFRIGERANT CHARGING CHART
Refer to Service Facts or Installer's Guide for charging method
8 9
179 182
195 198
211 215
229 232
247 251
267 271
287 291
309 313
331 336
355 360
381 386
407 413
435 441
464 470
495 501
I I n n t t r r o o d d u u c c t t i i o o n n , , U U n n i i t t I I n n s s p p e e c c t t i i o o n n a a n n d d S S p p e e c c i i f f i i c c a a t t i i o o n n
pressure under the subcool value column, Add
refrigerant to raise the pressure to match the table,
or remove refrigerant to lower the pressure. Again,
wait 20 minutes for the system conditions to
stabilize before adjusting charge again.
N N o o t t e e : : System charge shall never be more than 110% or
less than 90% of nameplate charge. If specified
subcooling cannot be achieved within those
charge bounds, contact your Field Service
Representative.
5. When system is correctly charged, you can refer to
System Pressure Curves to verify typical
performance.
C C H H A A R R G G I I N N G G B B E E L L O O W W 5 5 5 5 ° ° F F
Evacuate system and weigh in nameplate charge or
use factory charge. Correct subcooling may be verified
when the temperature is above 55°F.
DESIGN SUBCOOLING (°F)
10 11
LIQUID GAGE PRESSURE (PSI)
185 188
201 204
218 222
236 240
255 259
275 279
296 300
318 322
341 346
365 370
391 396
418 424
446 452
476 482
507 514
12 13
191 195
208 211
225 229
243 247
263 267
283 287
304 309
327 331
351 355
376 381
402 407
429 435
458 464
488 495
520 527
14 16
198 205
215 222
232 240
251 259
271 279
291 301
313 323
336 347
360 371
386 398
413 425
441 454
470 484
501 516
533 549
7