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Installer's Guide
G. COMPreSSOr STArTUP
After all electrical wiring is complete, SET THE THER-
MOSTAT SYSTEM SWITCH IN THE OFF POSITION SO
COMPRESSOR WILL NOT RUN, and apply power by closing
the system main disconnect switch. This will activate the
compressor sump heat (where used). Do not change the Ther-
mostat System Switch until power has been applied for one (1)
hour. Following this procedure will prevent potential compres-
sor overload trip at the initial start-up.
h. OPerATIOnAl And
CheCkOUT PrOCedUreS
Final phases of this installation are the unit Operational and
Checkout Procedures which are found in this instruction (see
table below and pages 6 and 8). To obtain proper performance,
all units must be operated and charge adjustments made in
accordance with procedures found on page 6 and in the Service
Facts.
IMPORTANT:
Perform a final unit inspection to be sure that factory tubing has
not shifted during shipment. Adjust tubing if necessary so tubes
do not rub against each other when the unit runs. Also be sure
that wiring connections are tight and wire routing is secure.
I. SeACOAST ShIeld
If installed within one mile of salt water, including seacoasts
and inland waterways, models without factory supplied
SUBCOOlInG ChArGInG In COOlInG ABOve 55°F Od AMBIenT
Trane has always recommended installing Trane approved matched
indoor and outdoor systems.
All Trane split systems are AHRI rated with only TXV indoor sys-
tems.
The benefits of installing approved indoor and outdoor split systems
are maximum efficiency, optimum performance and the best overall
system reliability.
The following charging methods are therefore prescribed for systems
with indoor TXVs.
1. Subcooling (in the cooling mode) is the only recommended
method of charging above 55°F ambient temperatures.
2. For best results - the indoor temperature should be kept be-
tween 70°F to 80°F. Add system heat if needed.
3. At start-up, or whenever charge is removed or added, the
system must be operated for a minimum twenty (20) minutes to
stabilize before accurate measurements can be made.
4. Measure Liquid Line Temperature and Refrigerant Pressure at
service valves.
5. Determine total refrigerant line length, and height (lift) if
indoor section is above the condenser. Use the Subcool Charg-
ing Chart Corrections Table to calculate any additional subcooling required for your specific application.
6. Determine the Design Subcooling from the unit nameplate or Service Facts. Add any additional amount of subcooling calculated in
Step 5 to the Design Subcooling to arrive at the final subcooling value.
7. Locate this value in the appropriate column of the R-410-A Refrigerant Charging Chart. Locate your liquid line temperature in
the left column of the chart, and the intersecting liquid line pressure under your calculated subcooling value column. Add refrigerant
to raise the pressure to match the chart, or remove refrigerant to lower the pressure. Again, wait twenty (20) minutes for the system
conditions to stabilize before adjusting charge again.
8. When system is correctly charged, you can refer to System Pressure Curves (in Service Facts) to verify typical performance.
6
Seacoast Salt Shields require the addition of BAYSEAC001
(Seacoast Kit) at installation time. Please refer to Application
Guide SS-APB006-EN: Trane - Seacoast Applications and Sea-
coast Corrosion Protection Bulletin UN-SVB11A-EN.
IMPORTANT:
See Limited Warranty information in Use and Care Manual.
J. TrOUBleShOOTInG
TrOUBleShOOTInG ChArT — WhAT TO CheCk
SYSTEM FAULTS
REFRIGERANT CIRCUIT
Liquid Pressure Too High
Liquid Pressure Too Low
Suction Pressure Too High
Suction Pressure Too Low
Liquid Refrig. Floodback TXV System
I.D. Coil Frosting
Compressor Runs Inadequate or No Cooling
ELECTRICAL
P
P
Compressor & O.D. Fan Do Not Start
Compressor Will Not Start But O.D. Fan Runs
P
S
P
P
O.D. Fan Won't Start
P
P
Compressor Hums But Won't Start
P
P
P
Compressor Cycles on IOL
P
S
P
P
I.D. Blower Won't Start
P
S
P - Primary Causes
S - Secondary Causes
r410A reFrIGerAnT ChArGInG ChArT
DESIGN SUBCOOLING (
LIQUID
8
9
TEMP
(
°
F)
LIQUID GAGE PRESSURE (PSI)
55
179
182
60
195
198
65
211
215
70
229
232
75
247
251
80
267
271
85
287
291
90
309
313
95
331
336
100
355
360
105
381
386
110
407
413
115
435
441
120
464
470
125
495
501
Refer to Service Facts or
Installer's Guide for charging method.
P
P
S
P
S
S
P
S
S
P
P
S
S
S
P
S
P
P
S
S
P
P
P
P
S
P
S
S
P
S
P
S
P
S
S
S
S
P
P
°
F)
10
11
12
13
185
188
191
195
201
204
208
211
218
222
225
229
236
240
243
247
255
259
263
267
275
279
283
287
296
300
304
309
318
322
327
331
341
346
351
355
365
370
376
381
391
396
402
407
418
424
429
435
446
452
458
464
476
482
488
495
507
514
520
527
From Dwg. D154557P01 Rev. 3
18-BC76D1-2
S
S
S
S
S
P
S
P
S
S
P
S
S
P
S
S
S
14
198
215
232
251
271
291
313
336
360
386
413
441
470
501
533
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