Carrier GEMINI SELECT 38APS025 050 User Manual
GEMINI™ SELECT  
38APS025-050,38APD025-100 Air-Cooled Condensing Units  
with PURON® Refrigerant (R-410A)  
50/60 Hz  
Installation Instructions  
CONTENTS  
CAUTION  
Page  
SAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . . . 1  
Puron refrigerant (R-410A) systems operate at higher pres-  
sures than standard R-22 systems. Do not use R-22 service  
equipment or components on Puron refrigerant equipment.  
If service equipment is not rated for Puron refrigerant,  
equipment damage or personal injury may result.  
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-34  
Step 1 — Inspect Shipment . . . . . . . . . . . . . . . . . . . . . . 1  
Step 2 — Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . 1  
• DOMESTIC UNITS  
• EXPORT UNITS  
• PLACING UNITS  
Step 3 — Make Refrigerant Piping  
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17  
• SIZE REFRIGERANT LINES  
• LIQUID LINE SOLENOID VALVE  
• THERMOSTATIC EXPANSION VALVES  
• LIQUID LINE FILTER DRIER  
INSTALLATION  
Step 1 — Inspect Shipment — Inspect unit for dam-  
age upon arrival. If damage is found, immediately file a claim  
with the shipping company. Verify proper unit delivery by  
checking unit nameplate data and the model number nomen-  
clature shown in Fig. 1. See Tables 1-4 for unit physical data.  
• LONG LINE APPLICATIONS  
• HOT GAS BYPASS  
Step 2 — Rig and Place Unit — All units are de-  
signed for overhead rigging, and it is important that this meth-  
od be used. Lifting holes are provided in the frame base rails. It  
is recommended to use shackles in the lifting holes (see rigging  
label on the unit and Table 5, and Fig. 2 and 3 for rigging  
weights and center of gravity). All panels must be in place  
when rigging.  
• FINAL CONNECTION AND LEAK TEST  
• EVACUATION AND DEHYDRATION  
Step 4 — Make Electrical Connections . . . . . . . . . . 26  
• POWER SUPPLY  
• POWER WIRING  
• CONTROL POWER  
• FIELD CONTROL WIRING  
IMPORTANT: To maintain unit stability while lifting,  
use 4 cables, chains or straps of equal length. Attach one  
end of each cable to shackle attachment point and the  
other end of each cable to the overhead rigging point.  
Step 5 — Install Accessories . . . . . . . . . . . . . . . . . . . . 34  
• LOW-AMBIENT OPERATION  
• MISCELLANEOUS ACCESSORIES  
SAFETY CONSIDERATIONS  
Use spreader bars or frame to keep the cables, chains, and  
straps clear of the unit sides. Leave standard coil protection  
packaging in place during rigging to provide protection to  
coils. Remove and discard all coil protection after rigging ca-  
bles are detached.  
Installing, starting up, and servicing this equipment can be  
hazardous due to system pressures, electrical components, and  
equipment location (roofs, elevated structures, etc.).  
Only trained, qualified installers and service mechanics  
should install, start up, and service this equipment.  
CAUTION  
Untrained personnel can perform basic maintenance func-  
tions, such as cleaning coils. All other operations should be  
performed by trained service personnel.  
When working on the equipment, observe precautions in the  
literature, and on tags, stickers, and labels attached to the  
equipment and any other safety precautions that may apply.  
All panels must be in place when rigging. Failure to com-  
ply could result in equipment damage.  
CAUTION  
•
•
•
Follow all safety codes.  
For unit sizes 025 to 060 when handling with a forklift,  
handle only through fork pocket holes. Failure to follow  
this caution could result in equipment damage or personal  
injury.  
Wear safety glasses and work gloves.  
Use care in handling, rigging, and setting bulky  
equipment.  
WARNING  
CAUTION  
Open all remote disconnects before servicing this equip-  
ment. Failure to do so could result in personal injury from  
electric shock.  
For unit sizes 070 to 100, do not forklift the unit unless unit  
is attached to a skid designed for forklifting. Failure to fol-  
low this caution could result in equipment damage or per-  
sonal injury.  
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.  
Catalog No. 04-53380002-01 Printed in U.S.A. Form 38AP-1SI Pg 1 8-09 Replaces: New  
Table 1 — 38AP025-050 Unit Physical Data — English  
38AP UNIT SIZE  
NOMINAL CAPACITY, 50/60Hz (tons)  
CIRCUIT  
025  
21/25  
027  
23/27  
030  
25/30  
040  
33/40  
050  
42/50  
Dual  
Single  
Dual  
Single  
Dual  
Single  
Dual  
Single  
Dual  
Single  
OPERATING WEIGHTS (lb)  
Standard  
With Low Sound Option  
1095  
1131  
1077  
1113  
1258  
1294  
1240  
1276  
1264  
1300  
1246  
1282  
2094  
2148  
1968  
2022  
2120  
2174  
1977  
2031  
APPROXIMATE REFRIGERANT CHARGE,  
TYPICAL (lb)*  
28  
24  
30  
26  
30  
26  
52  
40  
52  
40  
NITROGEN SHIPPING CHARGE  
15 psig  
COMPRESSOR  
hp (Qty) (CKT A/CKT B)  
11 (2)  
11 (2)  
13 (2)  
13 (2)  
15 (2)  
15 (2)  
10 (2)/  
8.5 (2)  
13 (3)  
11 (2)/  
13 (2)  
15 (3)  
CAPACITY STEPS  
Standard  
Digital Option  
2
22  
2
22  
2
22  
2
22  
2
22  
2
22  
4
44  
3
33  
4
44  
3
33  
CRANKCASE HEATER (W) (each compressor)  
90  
CONDENSER FANS  
Standard  
Propeller Type - Direct Drive  
Quantity  
2
2
2
2
2
2
3
3
3
3
RPM  
1140 (60 Hz), 950 (50 Hz)  
30  
Diameter (in.)  
Total Watts (60 Hz)  
Total Watts (50 Hz)  
Low Noise  
3300  
2750  
3300  
2750  
3300  
2750  
3300  
2750  
3300  
2750  
3300  
2750  
4200  
3500  
4200  
3500  
4200  
3500  
4200  
3500  
Shrouded Axial Fan - Direct Drive  
Quantity  
2
2
2
2
2
2
3
3
3
3
RPM  
850 (60 Hz), 700 (50 Hz)  
30  
Diameter (in.)  
Total Watts (60 Hz)  
Total Watts (50 Hz)  
2750  
2300  
2750  
2300  
2750  
2300  
2750  
2300  
2750  
2300  
2750  
2300  
3500  
2900  
3500  
2900  
3500  
2900  
3500  
2900  
CONDENSER COIL  
No. Coils per Circuit  
sq ft  
MCHX Type  
1
1
27.1  
27.1  
33.9  
33.9  
33.9  
33.9  
67.8  
67.8  
67.8  
67.8  
TEMPERATURE RELIEF  
Fusible Plug on Liquid Lines of Each Circuit - 210 F  
CONNECTIONS (in.) ODF (CKT A/CKT B)  
Suction Line  
13/8 / 13/8  
15/8  
13/8 / 13/8  
15/8  
13/8 / 13/8  
15/8  
15/8 / 15/8  
21/8  
15/8 / 15/8  
5/8 / 5/8  
21/8  
5/8 / 5  
75  
/
8
/
5/8 / 5  
75  
/
8
/
/
5
5
5
5
7
7
7
Liquid Line  
/
8 / 5/8  
75  
/
/
8 / 5/8  
75  
/
8
8
8
8
8
MAXIMUM HEIGHT FOR 3° F SUBCOOLING  
(ft)†  
75  
75  
75  
75  
75  
75  
CAPACITY PER CIRCUIT (%) (CKT A/CKT B)  
MINIMUM UNIT CAPACITY (%)  
50/50  
50  
100  
50  
50/50  
50  
100  
50  
50/50  
50  
100  
50  
54/46  
23  
100  
33  
48/52  
23  
100  
33  
LEGEND  
MCHX  
ODF  
—
—
Microchannel Heat Exchanger  
Outside Diameter, Female  
*Typical operating charge with 25 ft of interconnecting piping. Operating  
charge is approximate for maximum system capacity. Unit is factory supplied  
with nitrogen holding charge. Refrigerant charge for dual circuit units is the  
total for both circuits.  
†Maximum vertical separation between evaporator coil and condensing unit if  
condensing unit is below the evaporator.  
3
Table 2 — 38AP060-100 Unit Physical Data — English  
38AP UNIT SIZE  
NOMINAL CAPACITY, 50/60Hz (tons)  
CIRCUIT  
060  
50/60  
Dual  
070  
58/70  
Dual  
080  
67/80  
Dual  
090  
75/90  
Dual  
100  
83/100  
Dual  
OPERATING WEIGHTS (lb)  
Standard  
With Low Sound Option  
2227  
2299  
2450  
2522  
2610  
2700  
2835  
2943  
2844  
2952  
APPROXIMATE REFRIGERANT CHARGE,  
TYPICAL (lb)*  
60  
70  
78  
96  
100  
NITROGEN SHIPPING CHARGE  
15 psig  
COMPRESSOR  
hp (Qty) (CKT A/CKT B)  
13 (2)/15 (2)  
15 (2)/11 (3)  
15 (2)/15 (3)  
13 (3)/15 (3)  
15 (3)/15 (3)  
CAPACITY STEPS  
Standard  
Digital Option  
4
44  
5
55  
5
55  
6
66  
6
66  
CRANKCASE HEATER (W) (each compressor)  
90  
CONDENSER FANS  
Standard  
Propeller Type - Direct Drive  
Quantity  
4
4
5
6
6
RPM  
1140 (60 Hz), 950 (50 Hz)  
Diameter (in.)  
Total Watts (60 Hz)  
Total Watts (50 Hz)  
30  
7500  
6250  
6200  
5150  
6000  
5000  
9000  
7500  
9000  
7500  
Low Noise  
Quantity  
Shrouded Axial Fan - Direct Drive  
5
4
4
6
6
RPM  
850 (60 Hz), 700 (50 Hz)  
Diameter (in.)  
Total Watts (60 Hz)  
Total Watts (50 Hz)  
30  
5200  
4300  
5000  
4150  
6250  
5200  
7500  
6250  
7500  
6250  
CONDENSER COIL  
No. Coils per Circuit  
sq ft  
MCHX Type  
2 to 3  
124.5  
1
67.8  
2
99.6  
3
3
149.4  
149.4  
TEMPERATURE RELIEF  
Fusible Plug on Liquid Lines of Each Circuit - 210 F  
CONNECTIONS (in.) ODF (CKT A/CKT B)  
Suction Line  
15/8 / 15/8  
5/8 / 7/8  
15/8 / 21/8  
15/8 / 21/8  
7/8 / 7/8  
21/8 / 21/8  
7/8 / 7/8  
21/8 / 25/8  
7/8 / 7/8  
Liquid Line  
7/8 / 7  
75  
/
8
MAXIMUM HEIGHT FOR 3° F SUBCOOLING  
(ft)†  
75  
75  
75  
75  
CAPACITY PER CIRCUIT (%) (CKT A/CKT B)  
MINIMUM UNIT CAPACITY (%)  
46/54  
23  
47/53  
24  
40/60  
20  
46/54  
15  
50/50  
17  
LEGEND  
MCHX  
ODF  
—
—
Microchannel Heat Exchanger  
Outside Diameter, Female  
*Typical operating charge with 25 ft of interconnecting piping. Operating  
charge is approximate for maximum system capacity. Unit is factory supplied  
with nitrogen holding charge. Refrigerant charge for dual circuit units is the  
total for both circuits.  
†Maximum vertical separation between evaporator coil and condensing unit if  
condensing unit is below the evaporator.  
4
Table 3 — 38AP025-050 Unit Physical Data — SI  
38AP UNIT SIZES  
NOMINAL CAPACITY 50/60 Hz (kW)  
CIRCUIT  
025  
74/88  
027  
81/95  
030  
88/106  
040  
116/141  
050  
148/176  
Dual  
Single  
Dual  
Single  
Dual  
Single  
Dual  
Single  
Dual  
Single  
OPERATING WEIGHTS (kg)  
Standard  
With Low Sound Option  
497  
513  
489  
505  
571  
587  
562  
579  
573  
590  
565  
582  
950  
974  
893  
917  
961  
986  
897  
921  
APPROXIMATE REFRIGERANT CHARGE,  
TYPICAL (kg)*  
12.7  
10.9  
13.6  
11.8  
13.6  
11.8  
23.6  
18.1  
23.6  
18.1  
NITROGEN SHIPPING CHARGE  
1.03 bar  
COMPRESSOR  
kW (Qty) (CKT A/CKT B)  
8.2 (2)  
8.2 (2)  
9.7 (2)  
9.7 (2)  
11.2 (2)  
11.2 (2)  
7.5 (2)/  
6.3 (2)  
9.7 (3)  
8.2 (2)/  
9.7 (2)  
11.2 (3)  
CAPACITY STEPS  
Standard  
Digital Option  
2
22  
2
22  
2
22  
2
22  
2
22  
2
22  
4
44  
3
33  
4
44  
3
33  
CRANKCASE HEATER (W) (each compressor)  
90  
CONDENSER FANS  
Standard  
Propeller Type - Direct Drive  
Quantity  
2
2
2
2
2
2
3
3
3
3
r/s  
19 (60 Hz), 16 (50 Hz)  
762  
Diameter (mm)  
Total Watts (60 Hz)  
Total Watts (50 Hz)  
3300  
2750  
3300  
2750  
3300  
2750  
3300  
2750  
3300  
2750  
3300  
2750  
4200  
3500  
4200  
3500  
4200  
3500  
4200  
3500  
Low Noise  
Quantity  
Shrouded Axial Fan - Direct Drive  
2
2
2
2
2
2
3
3
3
3
r/s  
14 (60 Hz), 12 (50 Hz)  
762  
Diameter (mm)  
Total Watts (60 Hz)  
Total Watts (50 Hz)  
2750  
2300  
2750  
2300  
2750  
2300  
2750  
2300  
2750  
2300  
2750  
2300  
3500  
2900  
3500  
2900  
3500  
2900  
3500  
2900  
CONDENSER COIL  
No. Coils per Circuit  
sq m  
MCHX Type  
1
1
2.5  
2.5  
3.2  
3.2  
3.2  
3.2  
6.3  
6.3  
6.3  
6.3  
TEMPERATURE RELIEF  
Fusible Plug on Liquid Lines of Each Circuit - 99 C  
CONNECTIONS (in.) ODF (CKT A/CKT B)  
Suction Line  
13/8 / 13/8  
5/8 / 5/8  
15/8  
8
13/8 / 13/8  
15/8  
8
13/8 / 13/8  
5/8 / 5/8  
15/8  
8
15/8 / 15/8  
21/8  
8
15/8 / 15/8  
21/8  
8
5
5
7
7
7
Liquid Line  
/
5/8 / 5  
23  
/
/
/
5/8 / 5  
23  
/
/
5/8 / 5  
23  
/
/
8
8
8
MAXIMUM HEIGHT FOR 1.7° C  
SUBCOOLING (m)†  
23  
23  
23  
23  
23  
23  
23  
CAPACITY PER CIRCUIT (%) (CKT A/CKT B)  
MINIMUM UNIT CAPACITY (%)  
50/50  
50  
100  
50  
50/50  
50  
100  
50  
50/50  
50  
100  
50  
54/46  
23  
100  
33  
48/52  
23  
100  
33  
LEGEND  
MCHX  
ODF  
—
—
Microchannel Heat Exchanger  
Outside Diameter, Female  
*Typical operating charge with 7.62 m of interconnecting piping. Operating  
charge is approximate for maximum system capacity. Unit is factory supplied  
with nitrogen holding charge. Refrigerant charge for dual circuit units is the  
total for both circuits.  
†Maximum vertical separation between evaporator coil and condensing unit if  
condensing unit is below the evaporator.  
5
Table 4 — 38AP060-100 Unit Physical Data — SI  
38AP UNIT SIZES  
NOMINAL CAPACITY 50/60 Hz (kW)  
CIRCUIT  
060  
176/211  
Dual  
070  
204/246  
Dual  
080  
236/281  
Dual  
090  
264/317  
Dual  
100  
292/352  
Dual  
OPERATING WEIGHTS (kg)  
Standard  
With Low Sound Option  
1010  
1043  
1111  
1144  
1184  
1225  
1286  
1335  
1290  
1339  
APPROXIMATE REFRIGERANT CHARGE,  
TYPICAL (kg)*  
27.2  
31.8  
35.4  
43.5  
45.4  
NITROGEN SHIPPING CHARGE  
1.03 bar  
COMPRESSOR  
kW (Qty) (CKT A/CKT B)  
9.7 (2)/11.2 (2)  
11.2 (2)/8.2 (3)  
11.2 (2)/11.2 (3)  
9.7 (3)/11.2 (3)  
11.2 (3)/11.2 (3)  
CAPACITY STEPS  
Standard  
Digital Option  
4
44  
5
55  
5
55  
6
66  
6
66  
CRANKCASE HEATER (W) (each compressor)  
90  
CONDENSER FANS  
Standard  
Propeller Type - Direct Drive  
Quantity  
4
4
5
6
6
r/s  
19 (60 Hz), 16 (50 Hz)  
Diameter (mm)  
Total Watts (60 Hz)  
Total Watts (50 Hz)  
762  
7500  
6250  
6200  
5150  
6000  
5000  
9000  
7500  
9000  
7500  
Low Noise  
Quantity  
Shrouded Axial Fan - Direct Drive  
5
4
4
6
6
r/s  
14 (60 Hz), 12 (50 Hz)  
Diameter (mm)  
Total Watts (60 Hz)  
Total Watts (50 Hz)  
762  
6250  
5200  
5200  
4300  
5000  
4150  
7500  
6250  
7500  
6250  
CONDENSER COIL  
No. Coils per Circuit  
sq m  
MCHX Type  
2 - 3  
1
6.3  
2
9.3  
3 - 3  
13.9  
3 - 3  
13.9  
11.6  
TEMPERATURE RELIEF  
Fusible Plug on Liquid Lines of Each Circuit - 99 C  
CONNECTIONS (in.) ODF (CKT A/CKT B)  
Suction Line  
15/8 / 15/8  
5/8 / 7/8  
15/8 / 21/8  
15/8 / 21/8  
7/8 / 7/8  
21/8 / 21/8  
21/8 / 25/8  
7/8 / 7/8  
23  
7/8 / 7  
23  
/
/
8 / 7/8  
23  
7
Liquid Line  
8
MAXIMUM HEIGHT FOR 1.7° C  
SUBCOOLING (m)†  
23  
23  
CAPACITY PER CIRCUIT (%) (CKT A/CKT B)  
MINIMUM UNIT CAPACITY (%)  
46/54  
23  
47/53  
24  
40/60  
20  
46/54  
15  
50/50  
17  
LEGEND  
MCHX  
ODF  
—
—
Microchannel Heat Exchanger  
Outside Diameter, Female  
*Typical operating charge with 7.62 m of interconnecting piping. Operating  
charge is approximate for maximum system capacity. Unit is factory supplied  
with nitrogen holding charge. Refrigerant charge for dual circuit units is the  
total for both circuits.  
†Maximum vertical separation between evaporator coil and condensing unit if  
condensing unit is below the evaporator.  
6
Table 5 — Operational Corner Weights with Refrigerant Charge (Approximate)  
38APS Unit (lb)  
38APS Unit (kg)  
38APS  
UNIT  
SIZE  
OPERATIONAL CORNER WEIGHT  
38APS  
UNIT  
SIZE  
OPERATIONAL CORNER WEIGHT  
TOTAL  
WEIGHT  
TOTAL  
WEIGHT  
A
B
C
D
A
B
C
D
025  
027  
030  
040  
050  
1089  
1255  
1261  
1998  
2007  
356  
396  
399  
619  
623  
253  
291  
293  
616  
620  
200  
240  
241  
380  
381  
281  
327  
328  
382  
383  
025  
027  
030  
040  
050  
494  
569  
572  
906  
910  
161  
180  
181  
281  
282  
115  
132  
133  
280  
281  
91  
109  
109  
173  
173  
127  
148  
149  
173  
174  
38APD Unit (lb)  
38APD Unit (kg)  
38APD  
UNIT  
SIZE  
OPERATIONAL CORNER WEIGHT  
38APD  
UNIT  
SIZE  
OPERATIONAL CORNER WEIGHT  
TOTAL  
WEIGHT  
TOTAL  
WEIGHT  
A
B
C
D
A
B
C
D
025  
027  
030  
040  
050  
060  
070  
080  
090  
100  
1107  
1273  
1279  
2124  
2150  
2257  
2494  
2665  
2901  
2910  
360  
401  
404  
672  
683  
706  
723  
791  
759  
759  
258  
296  
297  
671  
684  
705  
620  
679  
750  
750  
204  
245  
245  
390  
392  
422  
532  
552  
692  
696  
285  
331  
333  
390  
391  
423  
620  
643  
700  
705  
025  
027  
030  
040  
050  
060  
070  
080  
090  
100  
502  
577  
580  
963  
975  
1024  
1131  
1209  
1316  
1320  
163  
182  
183  
305  
310  
320  
328  
359  
344  
344  
117  
134  
135  
305  
310  
320  
281  
308  
340  
340  
93  
111  
111  
177  
178  
192  
241  
250  
314  
316  
129  
150  
151  
177  
178  
192  
281  
292  
318  
320  
B
C
B
C
B
C
a38-7114  
A
D
A
D
A
D
TOP VIEW,  
SIZES 025 TO 030  
TOP VIEW, SIZES 040 TO 060  
TOP VIEW, SIZES 070 TO 100  
Fig. 2 — Corner Weights  
7
a38-7115  
a38-7116  
SIZES 025 TO 060  
SIZES 070 TO 100  
Fig. 3 — Rigging Labels  
a38-7130  
LEGEND  
4 x 24 in.  
ASTM “C”  
CHANNEL  
ASTM — American Society for  
Testing and Materials  
Fig. 4 — Perimeter Support Channel  
8
a38-7101  
9
a38-7102  
10  
a38-7103  
11  
a38-7104  
12  
OUTDOOR FAN LAYOUT (Single and Dual Circuit)  
OFM1  
OFM1  
OFM1  
OFM2  
OFM3  
OFM3  
OFM2  
OFM2  
OFM4  
TOP VIEW  
SIZES 025-030  
TOP VIEW  
SIZES 040-050  
TOP VIEW  
SIZES 060-070  
OFM1  
OFM2  
OFM3  
OFM5  
OFM6  
OFM1  
OFM2  
OFM5  
OFM3  
OFM6  
OFM4  
TOP VIEW  
SIZE 080  
TOP VIEW  
SIZES 090-100  
COMPRESSOR LAYOUT DUAL CIRCUIT  
A1  
B1  
B2  
B3  
A2  
B1  
A2  
A1  
B1  
A1  
B2  
TOP VIEW  
SIZES 070-080  
TOP VIEW  
SIZES 040-060  
TOP VIEW  
SIZES 025-030  
A3  
A2  
A1  
B1  
B2  
B3  
a38-7131  
TOP VIEW  
SIZES 090-100  
LEGEND  
A
B
— Circuit 1 Compressor  
— Circuit 2 Compressor  
OFM — Outdoor Fan  
COMPRESSOR LAYOUT SINGLE CIRCUIT  
A1  
A2  
A1  
A2  
A3  
TOP VIEW  
SIZES 040-050  
TOP VIEW  
SIZES 025-030  
Fig. 9 — Outdoor Fan and Compressor Layout  
13  
40RU  
a38-7098_gs  
LEGEND  
NOTES:  
1. All piping must follow standard refrigerant piping techniques. Refer to Carrier System  
Design Manual for details.  
LLSV — Liquid Line Solenoid Valve  
NEC — National Electrical Code  
TXV — Thermostatic Expansion Valve  
Piping  
2. All wiring must comply with the applicable local and national codes.  
3. Wiring and piping shown are general points-of-connection guides only and are not  
intended for, or to include all details for, a specific installation.  
4. Install field-supplied disconnect switch in accordance with all local and national electrical  
codes.  
Double Riser Piping (if required)  
*Field supplied.  
5. Liquid line solenoid valves (solenoid drop control) are not required but are recommended  
to prevent refrigerant migration to the compressor.  
†If double suction riser is required for piping  
system, size short riser (3 ft maximum)  
according to Fig. 12.  
6. Factory-supplied accumulator not shown.  
7. Dual-circuit piping shown. Single-circuit piping is similar but would only have one suction  
line and one liquid line.  
**Field supplied. See Table 6 for refrigerant spe-  
cialties part numbers.  
8. A field-supplied, 5% bleed port TXV is required for every application.  
9. Sight glass, LLSV, and filter drier are field supplied.  
10. Long line length check valves are required for liquid line installation on all linear line  
length applications of more than 100 ft (30.5 m). For any 025-030 size dual-circuit unit  
application where evaporator is located higher than the condensing unit, check valves  
are required for linear line length above 55 ft (16.8 m).  
Fig. 10 — 38AP Unit Rooftop Installation  
14  
a38-7099_gs  
NOTES:  
LEGEND  
1. All piping must follow standard refrigerant piping techniques. Refer to Carrier System  
Design Manual for details.  
2. All wiring must comply with the applicable local and national codes.  
3. Wiring and piping shown are general points-of-connection guides only and are not  
intended for, or to include all details for, a specific installation.  
4. Install field-supplied disconnect switch in accordance with all local and national electri-  
cal codes.  
5. Liquid line solenoid valves (solenoid drop control) are not required but are recom-  
mended to prevent refrigerant migration to the compressor.  
6. Factory-supplied accumulator not shown.  
7. Dual-circuit piping shown. Single-circuit piping is similar but would only have one suc-  
tion line and one liquid line.  
8. A field-supplied, 5% bleed port TXV is required for every application.  
9. Sight glass, LLSV, and filter drier are field supplied.  
LLSV — Liquid Line Solenoid Valve  
NEC — National Electrical Code  
TXV — Thermostatic Expansion Valve  
Piping  
*Field supplied.  
†Field supplied. See Table 6 for refrigerant spe-  
cialties part numbers.  
10. Long line length check valves are required for liquid line installation on all linear line  
length applications of more than 100 ft (30.5 m). For any 025-030 size dual-circuit unit  
application where evaporator is located higher than the condensing unit, check valves  
are required for linear line length above 55 ft (16.8 m).  
Fig. 11 — 38AP Unit Ground Level Installation  
15  
Table 6 — Refrigerant Specialties Part Numbers  
CIRCUIT A  
LLSV Coil  
38APS UNIT SIZE  
Tons  
24.0  
26.7  
LL Size (in.)  
LLSV  
Sight Glass  
Filter Drier  
24-v, 50/60 Hz  
5
/
EF680028  
EF680029  
EF680032  
EF680032  
KM680005  
KM680006  
KH680002  
KH680003  
8
025  
027  
7
/
8
5
/
EF680028  
EF680029  
EF680032  
EF680032  
KM680005  
KM680006  
KH680002  
KH680003  
8
7
/
8
5
/
EF680028  
EF680029  
EF680030  
EF680032  
EF680032  
EF680032  
KM680005  
KM680006  
KM680007  
KH680002  
KH680003  
KH680004  
8
7
030  
31.1  
/
8
11/8  
5
/
EF680028  
EF680029  
EF680030  
EF680032  
EF680032  
EF680032  
KM680005  
KM680006  
KM680007  
KH680003*  
KH680003  
KH680004  
8
7
040  
050  
39.8  
48.1  
/
8
11/8  
7
/
EF680029  
EF680030  
EF680032  
EF680032  
KM680006  
KM680007  
KH680003  
KH680004  
8
11/8  
CIRCUIT A  
LLSV Coil  
24-v, 50/60 Hz  
EF680032  
EF680032  
CIRCUIT B  
LLSV Coil  
24-v, 50/60 Hz  
EF680032  
EF680032  
38APD  
UNIT  
SIZE  
LL Size  
(in.)  
Sight  
Glass  
KM680004  
KM680005  
Filter  
Drier  
KH680001  
KH680002  
LL Size  
Sight  
Glass  
Filter  
Drier  
Tons  
12.0  
13.3  
LLSV  
Tons  
12.0  
13.3  
LLSV  
(in.)  
1
1
/
EF680031  
EF680028  
/
EF680031  
EF680028  
KM680004  
KM680005  
KH680001  
KH680002  
2
2
025  
027  
5
5
/
/
8
8
1
1
/
EF680031  
EF680028  
EF680032  
EF680032  
KM680004  
KM680005  
KH680001  
KH680002  
/
EF680031  
EF680028  
EF680032  
EF680032  
KM680004  
KM680005  
KH680001  
KH680002  
2
2
5
5
/
/
8
8
1
1
/
EF680031  
EF680028  
EF680029  
EF680032  
EF680032  
EF680032  
KM680004  
KM680005  
KM680006  
KH680001  
KH680002  
KH680003  
/
EF680031  
EF680028  
EF680029  
EF680032  
EF680032  
EF680032  
KM680004  
KM680005  
KM680006  
KH680001  
KH680002  
KH680003  
2
2
5
5
030  
15.6  
/
15.6  
/
8
8
7
7
/
/
8
8
1
—
—
—
—
—
/
EF680028  
EF680029  
EF680029  
EF680032  
EF680032  
EF680032  
KM680004  
KM680005  
KM680006  
KH680001  
KH680002  
KH680003  
2
5
5
040  
050  
060  
21.0  
23.8  
26.8  
/
EF680028  
EF680029  
EF680032  
EF680032  
KM680005  
KM680006  
KH680002  
KH680003  
18.2  
26.3  
31.5  
/
8
8
7
7
/
/
8
8
5
5
/
EF680028  
EF680029  
EF680032  
EF680032  
KM680005  
KM680006  
KH680002  
KH680003  
/
EF680028  
EF680029  
EF680032  
EF680032  
KM680005  
KM680006  
KH680002  
KH680003  
8
8
7
7
/
/
8
8
5
5
/
EF680028  
EF680029  
—
EF680032  
EF680032  
—
KM680005  
KM680006  
—
KH680002  
KH680003  
—
/
EF680028  
EF680029  
EF680030  
EF680032  
EF680032  
EF680032  
KM680005  
KM680006  
KM680007  
KH680002  
KH680003  
KH680004  
8
8
7
7
/
/
8
8
—
11/8  
5
5
/
EF680028  
EF680029  
EF680030  
EF680032  
EF680032  
EF680032  
KM680005  
KM680006  
KM680007  
KH680002  
KH680003  
KH680004  
/
EF680028  
EF680029  
EF680030  
EF680032  
EF680032  
EF680032  
KM680005  
KM680006  
KM680007  
KH680002  
KH680003  
KH680004  
8
8
7
7
070  
080  
31.8  
31.3  
/
35.5  
46.7  
/
8
8
11/8  
11/8  
5
5
/
EF680028  
EF680029  
EF680030  
EF680032  
EF680032  
EF680032  
KM680005  
KM680006  
KM680007  
KH680002  
KH680003  
KH680004  
/
EF680028  
EF680029  
EF680030  
EF680032  
EF680032  
EF680032  
KM680005  
KM680006  
KM680007  
KH680003*  
KH680003  
KH680004  
8
8
7
7
/
/
8
8
11/8  
11/8  
5
/
EF680028  
EF680029  
EF680030  
EF680032  
EF680032  
EF680032  
KM680005  
KM680006  
KM680007  
KH680003*  
KH680003  
KH680004  
—
—
—
—
—
8
7
7
090  
100  
40.3  
48.0  
47.1  
48.0  
/
/
EF680029  
EF680030  
EF680032  
EF680032  
KM680006  
KM680007  
KH680003  
KH680004  
8
8
11/8  
11/8  
7
7
/
EF680029  
EF680030  
EF680032  
EF680032  
KM680006  
KM680007  
KH680003  
KH680004  
/
EF680029  
EF680030  
EF680032  
EF680032  
KM680006  
KM680007  
KH680003  
KH680004  
8
8
11/8  
11/8  
LEGEND  
Liquid Line  
LL  
—
LLSV — Liquid Line Solenoid Valve  
*Bushing required to fit 5/8 in. line.  
NOTE:  
1. Filter driers have been sized based upon 1 to 2 psig pressure drop clean  
in accordance with ARI Standard 710.  
2. All pipe sizes are OD inches. Equivalent sizes in millimeters follow:  
in.  
mm  
12.7  
15.9  
22.2  
28.6  
1
/
2
5
/
8
7
/
8
11/8  
16  
SIZE REFRIGERANT LINES — Consider the length of pip-  
ing required between the condensing unit and indoor unit  
(evaporator), the amount of liquid lift, and compressor oil re-  
turn. Suction and liquid lines should be sized in accordance  
with Table 7. Double suction risers may be required if con-  
densing unit is located above the evaporator to assure proper  
oil return at minimum load operating conditions. See Table 7  
and Fig. 12. Note the indoor unit installtion instructions for ad-  
ditional information.  
Step 3 — Make Refrigerant Piping  
Connections  
CAUTION  
Do NOT bury refrigerant piping underground. Failure to  
comply could result in equipment damage.  
The units have large suction lines to minimize friction loss-  
es. The units also have the ability to operate at low capacity.  
Because of these capabilities, use special care with suction pip-  
ing and suction risers to ensure proper compressor oil return  
under all operating conditions. If the evaporator is above the  
condensing unit, the maximum allowable vertical separation  
between the condensing unit and the evaporator is 75 ft  
(22.9 m) for all units. Size suction lines in accordance with  
Table 7 and Fig. 12.  
CAUTION  
The field-supplied liquid line solenoid valve must be  
installed at the evaporator to avoid possible compressor  
damage during unit operation if the maximum allowable  
evaporator size is exceeded per Table 8. See Fig. 13 (for  
38APD025-100 dual-circuit units), or Fig. 14 (for  
38APS025-050 single-circuit units).  
a38-7132  
LEGEND  
D PIPE DIAMETER  
38AP  
A
B
C
D
— Pipe A, Suction Riser, without Trap  
— Pipe B, Suction Riser with Trap  
— Suction Line to Condensing Unit  
— Pipe D, Suction Riser Short Lift  
Dual Circuit  
UNIT  
SIZE  
Single Circuit  
Circuit A  
in. mm  
Circuit B  
in. mm  
in.  
mm  
RED. — Reducer  
STR — Street  
025  
027  
030  
040  
050  
060  
070  
080  
090  
100  
11/8  
11/8  
11/8  
13/8  
13/8  
13/8  
15/8  
15/8  
15/8  
15/8  
29  
29  
29  
35  
35  
35  
41  
41  
41  
41  
11/8  
11/8  
11/8  
11/8  
13/8  
15/8  
15/8  
15/8  
15/8  
15/8  
29  
29  
29  
29  
35  
41  
41  
41  
41  
41  
13/8  
13/8  
13/8  
15/8  
15/8  
—
35  
35  
35  
41  
41  
—
—
—
—
—
NOTES:  
1. Short riser, pipe D, is used when routing suction line to  
condensing unit connection. See table at right.  
2. See Table 7 for values of A, B, and C.  
—
—
—
—
Fig. 12 — Double Suction Riser Construction  
17  
Table 7 — Refrigerant Piping Requirements  
38APS025-050 Single-Circuit Units (60 Hz)  
TOTAL LINEAR LENGTH OF INTERCONNECTING PIPE, ft (m)  
38APS  
UNIT  
0-25  
(0-7.6)  
25-50  
(7.6-15.2)  
50-75  
75-100  
100-125  
125-150  
150-175  
175-200  
(15.2-22.9)  
(22.9-30.5)  
(30.5-38.1)  
(38.1-45.7)  
(45.7-53.3)  
(53.3-61.0)  
SIZE  
L
S
L
S
L
S
L
S
L
S
L
S
L
S
L
S
5
5
7
7
7
7
7
7
025  
027  
030  
040  
050  
/
/
/
/
/
13/8  
13/8  
13/8  
15/8  
15/8  
/
/
/
/
/
15/8  
15/8  
15/8  
21/8  
21/8  
/
/
/
/
/
15/8  
15/8  
21/8  
21/8  
21/8  
/
/
/
/
15/8  
21/8  
21/8  
21/8  
21/8  
/
/
/
/
21/8  
21/8  
21/8  
21/8  
25/8  
/
/
/
21/8  
21/8  
21/8  
21/8  
25/8  
/
/
/
21/8  
21/8  
21/8  
25/8  
25/8  
/
/
21/8  
21/8  
21/8  
25/8  
25/8  
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
5
5
5
7
5
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
8
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
38APD025-100 Dual-Circuit Units (60 Hz)  
TOTAL LINEAR LENGTH OF INTERCONNECTING PIPE, ft (m)  
0-25  
(0-7.6)  
25-50  
(7.6-15.2)  
50-75  
(15.2-22.9)  
75-100  
(22.9-30.5)  
100-125  
(30.5-38.1)  
125-150  
(38.1-45.7)  
150-175  
(45.7-53.3)  
175-200  
(53.3-61.0)  
38APD UNIT  
SIZE  
L
S
L
S
L
S
L
S
L
S
L
S
L
S
L
S
1
1
5
5
5
5
5
5
Ckt A  
025  
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
13/8  
11/8  
13/8  
13/8  
13/8  
13/8  
15/8  
15/8  
13/8  
15/8  
15/8  
15/8  
15/8  
15/8  
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
11/8  
11/8  
11/8  
11/8  
13/8  
13/8  
13/8  
13/8  
15/8  
15/8  
15/8  
15/8  
15/8  
21/8  
15/8  
21/8  
21/8  
21/8  
21/8  
21/8  
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
13/8  
13/8  
13/8  
13/8  
13/8  
13/8  
15/8  
15/8  
15/8  
15/8  
15/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
13/8  
13/8  
13/8  
13/8  
13/8  
13/8  
15/8  
15/8  
15/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
13/8  
13/8  
13/8  
13/8  
15/8  
15/8  
15/8  
15/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
25/8  
21/8  
25/8  
25/8  
25/8  
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
13/8  
13/8  
13/8  
13/8  
15/8  
15/8  
21/8  
15/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
25/8  
21/8  
25/8  
25/8  
25/8  
/
/
/
/
/
/
/
/
/
/
/
13/8  
13/8  
15/8  
15/8  
15/8  
15/8  
21/8  
15/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
25/8  
25/8  
25/8  
25/8  
25/8  
/
/
/
/
/
/
/
/
/
/
/
15/8  
15/8  
15/8  
15/8  
15/8  
15/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
25/8  
21/8  
25/8  
25/8  
25/8  
25/8  
25/8  
2
2
2
2
2
2
8
2
8
8
8
8
8
8
8
8
8
8
8
8
2
2
2
2
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
1
1
1
1
1
5
1
5
5
5
5
5
5
5
7
5
7
7
7
1
1
1
5
5
5
5
5
5
5
7
7
7
7
7
7
7
7
7
5
5
5
5
5
5
5
7
7
7
7
7
7
7
7
7
7
7
7
5
5
5
5
5
7
5
7
7
7
7
7
7
7
7
7
5
5
5
5
5
7
7
7
7
7
7
7
7
7
5
5
5
5
5
7
7
7
7
7
7
7
7
7
5
5
5
7
7
7
7
7
7
7
5
5
5
7
7
7
7
7
7
7
Ckt B  
Ckt A  
Ckt B  
027  
Ckt A  
Ckt B  
030  
Ckt A  
Ckt B  
040  
Ckt A  
Ckt B  
050  
Ckt A  
Ckt B  
060  
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
Ckt A  
Ckt B  
070  
Ckt A  
Ckt B  
080  
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
7
Ckt A  
Ckt B  
/
8
090  
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
Ckt A  
Ckt B  
100  
LEGEND  
L — Liquid Line  
S — Suction Line  
3. Suction and liquid line sizing is based on pressure drop equiva-  
lent to 2 F (1.1 C) at nominal rating conditions.  
4. All pipe sizes are OD inches. Equivalent sizes in millimeters  
follow:  
NOTES:  
1. Shading indicates double suction riser required on units if con-  
densing unit is located higher than evaporator.  
in.  
mm  
12.7  
15.9  
22.2  
28.6  
34.9  
41.3  
54.0  
66.7  
1
/
/
2
2. Pipe sizes are based on an equivalent length equal to the max-  
imum length of interconnecting piping, shown for each column,  
plus 50% for fittings. Example: Equivalent length = Maximum  
linear length x 1.5.  
5
8
7
/
8
11/8  
13/8  
15/8  
21/8  
25/8  
18  
Table 7 — Refrigerant Piping Requirements (cont)  
38APS025-050 Single-Circuit Units (50 Hz)  
TOTAL LINEAR LENGTH OF INTERCONNECTING PIPE, ft (m)  
38APS  
UNIT  
0-25  
(0-7.6)  
25-50  
(7.6-15.2)  
50-75  
75-100  
100-125  
125-150  
150-175  
175-200  
(15.2-22.9)  
(22.9-30.5)  
(30.5-38.1)  
(38.1-45.7)  
(45.7-53.3)  
(53.3-61.0)  
SIZE  
L
S
L
S
L
S
L
S
L
S
L
S
L
S
L
S
5
5
5
5
7
7
7
7
025  
027  
030  
040  
050  
/
/
/
/
/
11/8  
13/8  
13/8  
13/8  
15/8  
/
/
/
/
/
13/8  
13/8  
15/8  
15/8  
21/8  
/
/
/
/
/
15/8  
15/8  
15/8  
21/8  
21/8  
/
/
/
/
/
15/8  
15/8  
15/8  
21/8  
21/8  
/
/
/
/
/
15/8  
15/8  
21/8  
21/8  
21/8  
/
/
/
/
21/8  
21/8  
21/8  
21/8  
21/8  
/
/
/
/
21/8  
21/8  
21/8  
21/8  
25/8  
/
/
/
/
21/8  
21/8  
21/8  
21/8  
25/8  
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
5
5
5
5
5
5
7
7
5
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
11/8  
11/8  
11/8  
38APD025-100 Dual-Circuit Units (50 Hz)  
TOTAL LINEAR LENGTH OF INTERCONNECTING PIPE, ft (m)  
0-25  
(0-7.6)  
25-50  
(7.6-15.2)  
50-75  
(15.2-22.9)  
75-100  
(22.9-30.5)  
100-125  
(30.5-38.1)  
125-150  
(38.1-45.7)  
150-175  
(45.7-53.3)  
175-200  
(53.3-61.0)  
38APD UNIT  
SIZE  
L
S
L
S
L
S
L
S
L
S
L
S
L
S
L
S
1
1
1
5
5
5
5
5
Ckt A  
025  
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
13/8  
13/8  
13/8  
13/8  
13/8  
13/8  
13/8  
15/8  
13/8  
15/8  
15/8  
15/8  
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
13/8  
13/8  
13/8  
13/8  
13/8  
15/8  
15/8  
15/8  
15/8  
21/8  
15/8  
21/8  
21/8  
21/8  
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
11/8  
11/8  
11/8  
11/8  
13/8  
13/8  
13/8  
13/8  
15/8  
15/8  
15/8  
15/8  
15/8  
21/8  
15/8  
21/8  
21/8  
21/8  
21/8  
21/8  
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
13/8  
13/8  
13/8  
13/8  
13/8  
13/8  
15/8  
13/8  
15/8  
15/8  
15/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
13/8  
13/8  
13/8  
13/8  
13/8  
13/8  
15/8  
15/8  
15/8  
15/8  
15/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
13/8  
13/8  
13/8  
13/8  
13/8  
13/8  
15/8  
15/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
13/8  
13/8  
13/8  
13/8  
15/8  
15/8  
15/8  
15/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
25/8  
21/8  
25/8  
25/8  
25/8  
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
13/8  
13/8  
13/8  
13/8  
15/8  
15/8  
21/8  
15/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
21/8  
25/8  
21/8  
25/8  
25/8  
25/8  
2
2
2
2
2
2
2
2
8
8
8
8
8
8
8
8
8
8
8
8
2
2
2
2
2
2
8
8
8
8
8
8
8
8
8
8
8
8
8
8
2
2
2
2
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
1
1
1
1
1
1
1
5
5
5
5
5
5
5
5
5
5
5
5
1
1
1
1
1
5
5
5
5
5
5
5
7
5
7
7
7
7
7
1
1
1
5
5
5
5
5
5
5
7
7
7
7
7
7
7
7
7
5
5
5
5
5
5
5
5
7
7
7
7
7
7
7
7
7
7
7
5
5
5
5
5
5
5
7
7
7
7
7
7
7
7
7
7
7
7
5
5
5
5
5
5
5
7
7
7
7
7
7
7
5
5
5
5
5
7
7
7
7
7
7
7
7
7
5
5
5
5
5
7
7
7
7
7
7
7
7
7
Ckt B  
Ckt A  
Ckt B  
027  
Ckt A  
Ckt B  
030  
Ckt A  
Ckt B  
040  
Ckt A  
Ckt B  
050  
Ckt A  
Ckt B  
060  
Ckt A  
Ckt B  
070  
Ckt A  
Ckt B  
080  
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
11/8  
7
Ckt A  
Ckt B  
/
8
090  
11/8  
11/8  
11/8  
Ckt A  
Ckt B  
100  
LEGEND  
L — Liquid Line  
S — Suction Line  
3. Suction and liquid line sizing is based on pressure drop equiva-  
lent to 2 F (1.1 C) at nominal rating conditions.  
4. All pipe sizes are OD inches. Equivalent sizes in millimeters  
follow:  
NOTES:  
1. Shading indicates double suction riser required on units if con-  
densing unit is located higher than evaporator.  
in.  
mm  
12.7  
15.9  
22.2  
28.6  
34.9  
41.3  
54.0  
66.7  
1
/
/
2
2. Pipe sizes are based on an equivalent length equal to the max-  
imum length of interconnecting piping, shown for each column,  
plus 50% for fittings. Example: Equivalent length = Maximum  
linear length x 1.5.  
5
8
7
/
8
11/8  
13/8  
15/8  
21/8  
25/8  
19  
Table 7 — Refrigerant Piping Requirements (cont)  
38APS025-50 Single-Circuit Units Double Suction Riser (60 Hz)  
TOTAL LINEAR LENGTH OF INTERCONNECTING PIPE, ft (m)  
38APS  
UNIT  
SIZE  
0-25  
(0-7.6)  
B
25-50  
(7.6-15.2)  
50-75  
75-100  
100-125  
(30.5-38.1)  
B
125-150  
(38.1-45.7)  
B
150-175  
(45.7-53.3)  
B
175-200  
(53.3-61.0)  
B
(15.2-22.9)  
(22.9-30.5)  
A
C
A
B
C
A
B
C
A
B
C
A
C
A
C
A
C
A
C
025  
027  
030  
040  
050  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8  
—
—
—
—
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8  
—
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8  
—
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 15/8 21/8 25/8 15/8 21/8 25/8  
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 15/8 21/8 25/8 15/8 21/8 25/8 15/8 21/8 25/8 15/8 21/8 25/8  
—
38APD025-100 Dual-Circuit Units Double Suction Riser (60 Hz)  
TOTAL LINEAR LENGTH OF INTERCONNECTING PIPE, ft (m)  
0-25  
(0-7.6)  
B
25-50  
(7.6-15.2)  
50-75  
(15.2-22.9)  
B
75-100  
(22.9-30.5)  
B
100-125  
(30.5-38.1)  
B
125-150  
(38.1-45.7)  
B
150-175  
(45.7-53.3)  
B
175-200  
(53.3-61.0)  
B
38APD UNIT  
SIZE  
A
C
A
B
C
A
C
A
C
A
C
A
C
A
C
A
C
Ckt A  
025  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Ckt B  
—
Ckt A  
027  
—
Ckt B  
—
Ckt A  
030  
—
Ckt B  
—
Ckt A  
040  
—
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8  
13/8 15/8 21/8  
Ckt B  
—
—
—
—
—
—
—
Ckt A  
050  
—
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8  
Ckt B  
—
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8  
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8  
Ckt A  
060  
—
Ckt B  
—
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8  
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8  
Ckt A  
070  
—
Ckt B  
—
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 15/8 21/8 25/8  
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8  
Ckt A  
080  
—
—
—
—
Ckt B  
—
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 15/8 21/8 25/8 15/8 21/8 25/8 15/8 21/8 25/8 15/8 21/8 25/8  
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 15/8 21/8 25/8 15/8 21/8 25/8  
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 15/8 21/8 25/8 15/8 21/8 25/8 15/8 21/8 25/8 15/8 21/8 25/8  
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 15/8 21/8 25/8 15/8 21/8 25/8 15/8 21/8 25/8 15/8 21/8 25/8  
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 15/8 21/8 25/8 15/8 21/8 25/8 15/8 21/8 25/8 15/8 21/8 25/8  
Ckt A  
090  
—
Ckt B  
—
Ckt A  
100  
—
Ckt B  
—
LEGEND  
Not Required  
Pipe A — Suction Riser without Trap  
Pipe B — Suction Riser with Trap  
Pipe C — Suction Line Condensing Unit  
—
—
a38-4149tf  
1. Refer to the figure located to the right for suction line piping locations.  
2. Pipe sizes are based on an equivalent length equal to the maximum  
length of interconnecting piping, shown for each column, plus 50% for  
fittings.  
3. Suction and liquid line sizing is based on pressure drop equivalent to 2 F  
(1.1 C) at nominal rating conditions.  
4. All pipe sizes are OD inches. Equivalent sizes in millimeters follow:  
LEGEND  
Suction Riser  
—
—
—
—
without Trap  
in.  
mm  
12.7  
15.9  
22.2  
28.6  
34.9  
41.3  
54.0  
66.7  
Suction Riser  
with Trap  
Suction Line to  
Condensing Unit  
Pipe Diameter to be  
as Listed in Fig. 12.  
1
/
2
5
/
8
7
/
8
11/8  
13/8  
15/8  
21/8  
25/8  
SUCTION LINE PIPING  
20  
Table 7 — Refrigerant Piping Requirements (cont)  
38APS025-50 Single-Circuit Units Double Suction Riser (50 Hz)  
TOTAL LINEAR LENGTH OF INTERCONNECTING PIPE, ft (m)  
38APS  
UNIT  
SIZE  
0-25  
(0-7.6)  
B
25-50  
(7.6-15.2)  
50-75  
75-100  
100-125  
125-150  
(38.1-45.7)  
B
150-175  
(45.7-53.3)  
B
175-200  
(53.3-61.0)  
B
(15.2-22.9)  
(22.9-30.5)  
(30.5-38.1)  
A
C
A
B
C
A
B
C
A
B
C
A
B
C
A
C
A
C
A
C
025  
027  
030  
040  
050  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8  
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8  
—
—
—
—
—
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8  
—
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8  
—
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 15/8 21/8 25/8 15/8 21/8 25/8  
38APD025-100 Dual-Circuit Units Double Suction Riser (50 Hz)  
TOTAL LINEAR LENGTH OF INTERCONNECTING PIPE, ft (m)  
0-25  
(0-7.6)  
B
25-50  
(7.6-15.2)  
50-75  
(15.2-22.9)  
B
75-100  
(22.9-30.5)  
B
100-125  
(30.5-38.1)  
B
125-150  
(38.1-45.7)  
B
150-175  
(45.7-53.3)  
B
175-200  
(53.3-61.0)  
B
38APD UNIT  
SIZE  
A
C
A
B
C
A
C
A
C
A
C
A
C
A
C
A
C
Ckt A  
025  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Ckt B  
—
Ckt A  
027  
—
Ckt B  
—
Ckt A  
030  
—
Ckt B  
—
Ckt A  
040  
—
13/8 15/8 21/8  
Ckt B  
—
—
—
—
Ckt A  
050  
—
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8  
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8  
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8  
Ckt B  
—
Ckt A  
060  
—
Ckt B  
—
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8  
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8  
Ckt A  
070  
—
Ckt B  
—
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8  
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8  
Ckt A  
080  
—
—
—
—
Ckt B  
—
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 15/8 21/8 25/8 15/8 21/8 25/8  
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8  
Ckt A  
090  
—
—
—
—
Ckt B  
—
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 15/8 21/8 25/8 15/8 21/8 25/8  
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 15/8 21/8 25/8 15/8 21/8 25/8  
13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 13/8 15/8 21/8 15/8 21/8 25/8 15/8 21/8 25/8  
Ckt A  
100  
—
Ckt B  
—
LEGEND  
Not Required  
Pipe A — Suction Riser without Trap  
Pipe B — Suction Riser with Trap  
Pipe C — Suction Line Condensing Unit  
—
—
a38-4149tf  
1. Refer to the figure located to the right for suction line piping locations.  
2. Pipe sizes are based on an equivalent length equal to the maximum  
length of interconnecting piping, shown for each column, plus 50% for  
fittings.  
3. Suction and liquid line sizing is based on pressure drop equivalent to 2 F  
(1.1 C) at nominal rating conditions.  
4. All pipe sizes are OD inches. Equivalent sizes in millimeters follow:  
LEGEND  
Suction Riser  
—
—
—
—
without Trap  
in.  
mm  
12.7  
15.9  
22.2  
28.6  
34.9  
41.3  
54.0  
66.7  
Suction Riser  
with Trap  
Suction Line to  
Condensing Unit  
Pipe Diameter to be  
as Listed in Fig. 12.  
1
/
2
5
/
8
7
/
8
11/8  
13/8  
15/8  
21/8  
25/8  
SUCTION LINE PIPING  
21  
LIQUID LINE SOLENOID VALVE — Field-supplied  
liquid line solenoid valve(s) must be installed at the evaporator  
if coil surface area is exceeded per Table 8. Install liquid line  
solenoid valve just ahead of the TXVs (thermostatic expansion  
valves) which will be mounted at the evaporator. See Fig. 13  
(for 38APD025-100 dual-circuit units), or Fig. 14 (for  
38APS025-050 single-circuit units). Refer to Table 6.  
HOT GAS BYPASS — Hot gas bypass is not recommended.  
If hot gas bypass is used, it should be introduced before the  
evaporator.  
FINAL CONNECTION AND LEAK TEST  
CAUTION  
THERMOSTATIC EXPANSION VALVES — All 38AP  
units must be installed with 5% bleed TXVs to ensure proper  
unit operation.  
To achieve good mixing of the refrigerant leaving the evap-  
orator suction header for proper sensing by the TXV bulb:  
1. Install a minimum of two 90-degree elbows upstream  
of the TXV bulb location. See Fig. 15 for dual-circuit  
units and Fig. 16 for single-circuit units.  
2. Locate the TXV bulb on a vertical riser, where possi-  
ble. If a horizontal location is necessary, secure the  
bulb at approximately the 4 o’clock position.  
If an oil return connection is located at the bottom of the  
evaporator suction header, tee-in this connection ahead of first  
mixing elbow. See Fig. 15 (for dual-circuit units) or Fig. 16  
(for single-circuit units). When the compressor is below the  
evaporator, the riser at the evaporator should extend to the top  
of the evaporator section. After the riser is installed, the suction  
line can elbow down immediately. Refer to the evaporator  
product data for sizing information.  
LIQUID LINE FILTER DRIER — Installation of a field-  
supplied filter drier and sight glasses in each refrigerant circuit  
is required. Select the filter drier for maximum unit capacity  
and minimum pressure drop. Figure 13 (for dual-circuit units)  
or Fig. 14 (for single-circuit units) shows required location of  
solenoid valves and recommended locations for the filter driers  
and sight glasses. Complete the refrigerant piping from the  
evaporator to the condenser before opening the liquid and suc-  
tion lines at the condenser. Refer to Table 6.  
The 38AP unit is shipped with a nitrogen holding charge.  
Use caution when relieving unit pressure to avoid possible  
equipment damage or personal injury.  
Relieve the pressure caused by the nitrogen holding charge.  
Connect liquid line and suction line to field piping. Refer to  
Fig. 5-8 for circuit orientation.  
IMPORTANT: Protect the liquid and suction service  
valves from the heat of brazing. Schrader valve cores  
must be removed from the liquid and suction service  
valves before brazing in field connection piping to avoid  
damage. Reinsert cores after brazing is completed.  
The refrigerant system must not be opened and exposed to  
atmosphere for longer than 15 minutes. Connection and pump-  
down should be made as soon as possible to avoid acids  
forming in the compressor POE (polyolester) oils, which could  
damage the compressors.  
Leak test the entire system by using soap bubbles and nitro-  
gen or R-410A and an electronic leak detector.  
Purge nitrogen or recover R-410A from system after com-  
pletion of leak-checking procedure. Repair leak if one is found.  
When finished, evacuate and dehydrate system using the fol-  
lowing method.  
EVACUATION AND DEHYDRATION — Because the  
38AP systems use polyolester oil, which can absorb moisture,  
it is important to minimize the amount of time that the system  
interior is left exposed to the atmosphere. Minimizing the  
exposure time of the oil to the atmosphere will minimize the  
amount of moisture that needs to be removed during  
evacuation.  
Once all of the piping connections are complete, leak test  
the unit and then pull a deep dehydration vacuum. Connect the  
vacuum pump to the charging valve in the suction line and to  
the liquid line service valve. For best results, it is recommended  
that a vacuum of at least 500 microns (0.5 mm Hg) be ob-  
tained. Afterwards, to ensure that no moisture is present in the  
system, perform a standing vacuum-rise test.  
With the unit in deep vacuum (500 microns or less), isolate  
the vacuum pump from the system. Observe the rate-of-rise of  
the vacuum in the system. If the vacuum rises by more than  
50 microns in a 30-minute time period, then continue the dehy-  
dration process. Maintain a vacuum on the system until the  
standing vacuum requirement is met. This will ensure a dry  
system.  
CAUTION  
For all units with liquid lines of 100 ft (30.5 m) or more or  
any 025-030 size dual circuit unit application where evapo-  
rator is located higher than the condensing unit and liquid  
lines exceed 55 feet (16.8 m), a long line option kit must be  
installed to prevent compressor failure. The long line  
option kit must be mounted in the liquid line near the con-  
densing unit. See Fig. 17.  
LONG LINE APPLICATIONS — A long line option kit  
must be installed for:  
1. Any 025-030 size dual circuit unit where the evapora-  
tor is located higher than the condensing unit and the  
linear line length exceeds 55 ft (16.8 m).  
2. Any size dual or single circuit unit with linear line  
length of 100 ft (30.5 m) or more.  
By following these evacuation and dehydration procedures,  
the amount of moisture present in the system will be mini-  
mized. It is required that liquid line filter driers be installed be-  
tween the condenser(s) and the expansion devices to capture  
any foreign debris and provide additional moisture removal ca-  
pacity. Be sure to consider the pressure drop of the filter drier  
when determining piping requirements.  
The kit consists of a liquid line check valve and a bypass  
check valve to prevent charge migration to compressor. The  
long line option kit must be mounted in the liquid line near the  
condensing unit. The kit may be mounted in any orientation,  
horizontally or vertically. See Fig. 17 for orientation and  
Fig. 11 for location.  
22  
a38-7117  
†
†
LEGEND  
LLS — Liquid Line Solenoid  
TXV — Thermostatic Expansion Valve  
*Field-supplied.  
†Field-supplied when required. See Table 8.  
Fig. 13 — Required Location of Solenoid Valves and Recommended Filter Drier and  
Sight Glass Locations for 38APD025-100 Dual-Circuit Units  
a38-7118  
SECTION 1  
LIQUID  
LINE  
SECTION 2  
SOLENOID VALVE†  
SECTION 1  
LIQUID  
LINE  
SECTION 2  
SOLENOID VALVE†  
*Field-supplied.  
†Field-supplied when required. See Table 8.  
Fig. 14 — Required Location of Solenoid Valves and Recommended Filter Drier and  
Sight Glass Locations for 38APS025-050 Single-Circuit Units  
23  
a38-7120  
SECTION  
SECTION  
SECTION  
SECTION  
LEGEND  
TXV — Thermostatic Expansion Valve  
TYP — Typical  
NOTE: For units with single condensate pan, lower coil section is first on, last off.  
Fig. 15 — Typical Piping Connections for Face Split Coils for 38APD025-100 Dual-Circuit  
SECTION  
SECTION  
SECTION  
SECTION  
a38-7121  
LEGEND  
TXV — Thermostatic Expansion Valve  
TYP — Typical  
NOTE: For units with single condensate pan, lower coil section is first on, last off.  
Fig. 16 — Typical Piping Connections for Face Split Coils for 38APS025-050 Single-Circuit Units  
24  
Table 8 — Requirements for Installation of Liquid Line Solenoid Valve  
MAXIMUM ALLOWABLE EVAPORATOR SURFACE AREA  
38AP UNIT  
SIZE  
WITHOUT LIQUID LINE SOLENOID VALVE (sq ft)  
CIRCUIT  
4-Row, 1/2 in. Tube 6-Row, 1/2 in. Tube 8-Row, 1/2 in. Tube 3-Row, 3/8 in. Tube 4-Row, 3/8 in. Tube  
Circuit A  
Circuit B  
Single Circuit  
Circuit A  
Circuit B  
Single Circuit  
Circuit A  
Circuit B  
Single Circuit  
Circuit A  
Circuit B  
Single Circuit  
Circuit A  
Circuit B  
Single Circuit  
Circuit A  
Circuit B  
Circuit A  
Circuit B  
Circuit A  
Circuit B  
Circuit A  
18.9  
18.9  
37.9  
21.7  
25.6  
47.3  
21.7  
25.6  
47.3  
47.3  
47.3  
94.7  
47.3  
47.3  
94.7  
47.3  
47.3  
69.7  
69.7  
69.7  
104.6  
104.6  
104.6  
104.6  
104.6  
12.7  
12.7  
25.3  
14.5  
17.1  
31.6  
14.5  
17.1  
31.6  
31.6  
31.6  
63.3  
31.6  
31.6  
63.3  
31.6  
31.6  
46.6  
46.6  
46.6  
69.9  
69.9  
69.9  
69.9  
69.9  
9.5  
9.5  
36.1  
36.1  
72.3  
41.4  
48.9  
90.3  
41.4  
48.9  
90.3  
—
—
—
—
—
—
—
—
—
28.1  
28.1  
56.3  
32.3  
38.1  
70.4  
32.3  
38.1  
70.4  
—
—
—
—
—
—
—
—
—
025  
027  
030  
040  
050  
18.9  
10.9  
12.8  
23.7  
10.9  
12.8  
23.7  
23.7  
23.7  
47.3  
23.7  
23.7  
47.3  
23.7  
23.7  
34.9  
34.9  
34.9  
52.3  
52.3  
52.3  
52.3  
52.3  
060  
070  
080  
090  
100  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Circuit B  
Circuit A  
Circuit B  
a38-7119  
NOTE: Locate long line kit as close to the  
condensing unit as possible.  
Fig. 17 — Long Line Option Kit Installation  
25  
CONTROL POWER — Control power is obtained from the  
main power supply and does NOT require a separate source. A  
toggle switch (marked Emergency On-Off on the unit label  
diagram and by the switch) allows the control circuit to be  
manually disconnected when necessary. Crankcase heaters are  
in an operable state when this switch is in the Off position. All  
field control wiring must comply with applicable local and  
national codes.  
Step 4 — Make Electrical Connections  
WARNING  
Before performing service or maintenance operations on  
unit, turn off main power switch to unit. Electrical shock  
could cause personal injury.  
IMPORTANT: When starting up this equipment for  
operation, be sure to check tightness of all electrical ter-  
minal connections, clamps, screws, etc., as they may  
have become loose during shipment. It is also advisable  
to re-tighten all electrical connections after equipment  
has been in operation and components have reacted to  
operating temperature.  
IMPORTANT: For 208-v systems, the connection tap  
for all transformers must be changed. The factory  
default setting is for 230-v. Failure to connect to the  
proper tap may result in unreliable operation.  
FIELD CONTROL WIRING — The standard unit control is  
microprocessor based which supports multiple control  
configurations. See Fig. 19 for EAT (evaporator air tempera-  
ture sensor) and SAT (supply air temperature sensor) layout.  
Figures 20-24 show specific field wiring, depending on unit  
configuration and desired control requirements.  
POWER SUPPLY — The electrical characteristics of the  
available power supply must agree with the unit nameplate  
rating. Supply voltage must be within the limits shown in  
Tables 9-12. See Table 13 for incoming power options.  
Constat Volume Application Control Options  
IMPORTANT: Operating unit on improper supply  
voltage or with excessive phase imbalance constitutes  
abuse and may adversely affect Carrier warranty.  
1. Two-Stage Thermostat (Part No. 33CS2PP2S-01) —  
Refer to Fig. 20.  
2. Two-Stage Thermostat (Part No. 33CS2PP2S-01) with  
Multi-Step Control — Refer to Fig. 21. This thermo-  
stat also requires installation of supply-air temperature  
sensor and return-air temperature sensor (Part No.  
33ZCSENSAT).  
3. Space Sensor Control — Refer to Fig. 22. This control  
also requires installation of supply-air temperature  
sensor and return-air temperature sensor (Part No.  
33ZCSENSAT).  
CAUTION  
Proper rotation of condenser fan(s) MUST be verified  
before compressors are started. Consult the Controls, Start-  
Up and Operation guide provided with the 38AP units for  
correct procedure. Failure to comply could result in possi-  
ble equipment damage.  
a. Space Temperature Sensor with Occupancy Over-  
ride Button (Part No. 33ZCT55SPT)  
b. Space Temperature Sensor with Occupancy Over-  
ride Button and Set Point Adjustment Slidebar  
(Part No. 33ZCT56SPT)  
c. Space Temperature Sensor with Occupancy Over-  
ride Button, Set Point Adjustment Slidebar, and  
LCD (liquid crystal display) Display (Part No.  
33ZCT59SPT)  
POWER WIRING — All power wiring must comply with  
applicable local and national codes. Install field-supplied  
branch circuit fused disconnect per NEC (National Electrical  
Code, U.S.A) of a type that can be locked OFF or OPEN. Dis-  
connect must be within sight and readily accessible from the  
unit in compliance with NEC Article 440-14.  
General Wiring Notes:  
1. The control circuit does NOT require a separate power  
source. Control circuit power is obtained by a step-down  
transformer from the main three-phase power supply. Be  
sure that the appropriate connection tap is connected on  
all transformers for the supply voltage.  
2. A low-voltage terminal strip (LVT) is provided for  
field-wired control devices.  
NOTE: The field-supplied disconnect should never be off  
except when unit is being serviced or is to be down for a pro-  
longed period.  
Variable Air Volume Application Control Options  
1. Discharge-air temperature control requires installation  
of supply-air temperature sensor and return-air  
temperature sensor (Part No. 33ZCSENSAT). Refer to  
Fig. 23.  
2. Interface with building automation system may require  
EMM (energy management module) or translator  
accessory. Refer to Fig. 23.  
Energy Management Module (EMM) Option — The EMM  
is available for factory or field installation. See Fig. 24 for  
EMM field wiring.  
3. Power entry is at one end only.  
4. All field power enters the unit through a hole located in  
the corner post of the unit or the bottom of the control box  
shelf. Refer to Fig. 18 for field power wiring details. Re-  
fer to Fig. 5-8 for exact location of field power entry.  
5. Terminals for field power supply are suitable only for  
copper conductors. Insulation must be rated 75 C  
minimum.  
6. Units with high short circuit ratings and terminal block  
option require that specific fuses be applied to achieve  
this rating. Refer to Table 13.  
26  
a38-7122  
LEGEND  
b. Incoming wire size range for terminal block with MCA from 175.1 amps to  
420 amps is 2 AWG to 600 kcmil.  
EQUIP GND  
NEC  
—
—
Equipment Ground  
National Electrical Code  
c. Incoming wire size range for non-fused disconnect with MCA up to  
100 amps is 14 AWG to 1/0.  
d. Incoming wire size range for non-fused disconnect with MCA from  
100.1 amp to 200 amps is 6 AWG to 350 kcmil.  
NOTES:  
1. Factory wiring is in accordance with UL 1995 standards. Field modifications  
or additions must be in compliance with all applicable codes.  
2. All units or modules have single point primary power connection. Main  
power must be supplied from a field or factory-supplied disconnect.  
3. Wiring for main field supply must be rated 75 C. Use copper conductors only.  
a. Incoming wire size range for terminal block with MCA (minimum circuit  
amps) up to 175 amps is 14 AWG (American Wire Gage) to 2/0.  
e. Incoming wire size range for non-fused disconnect with MCA from  
200.1 amp to 450 amps is 3/0 to 500 kcmil.  
4. Refer to certified dimensional drawings for exact locations of the main power  
and control power entrance locations.  
Fig. 18 — Field Power Wiring  
a38-7133  
RETURN  
AIR  
EAT  
SAT  
FS1*  
DUCT  
SUPPLY  
OUTSIDE  
AIR  
FAN  
LEGEND  
EAT — Evaporator Air Temperature Sensor  
FS1 — Fan Status Switch (24-v)  
SAT — Supply Air Temperature Sensor  
EVAPORATOR  
COIL  
*FS1 can be pressure differential switch (shown), motor current detection, or sail switch.  
Fig. 19 — EAT and SAT Sensor Layout  
27  
LVT  
TERMINAL  
STRIP  
*Not required for single circuit units.  
Fig. 20 — Constant Volume Application Wiring Diagram 2-Stage Thermostat Control, Sizes 025-030 —  
without Digital Scroll Option  
LVT  
TERMINAL  
STRIP  
*
a38-7126  
*
*See Fig. 19 for EAT and SAT location.  
†Not required for single circuit units.  
Fig. 21 — Constant Volume Application Wiring Diagram 2-Stage Thermostat Control — with Digital Scroll  
Option, Sizes 025-30 or without Digital Scroll Option, Sizes 040-100  
28  
LVT  
TERMINAL  
STRIP  
a38-7127  
*
*See Fig. 19 for EAT and SAT location.  
†Not required for single circuit units.  
Fig. 22 — Constant Volume Application Wiring Diagram Space Temperature Sensor Control,  
Sizes 025-100  
LVT  
TERMINAL  
STRIP  
a38-7128  
*
*See Fig. 19 for EAT and SAT location.  
†Not required for single circuit units.  
Fig. 23 — Variable Air Volume Application Wiring Diagram, Sizes 025-100  
29  
LVT  
TERMINAL  
STRIP  
a38-7129  
Fig. 24 — Optional Energy Management Module Wiring  
Legend and Notes for Fig. 20-24  
LEGEND  
3. Wiring for main field supply must be rated 75 C. Use copper  
conductors only.  
ALM R  
COM  
— Alarm Relay (24-v), 5-va Maximum  
— Communication  
a. Incoming wire size range for terminal block with MCA (mini-  
mum circuit amps) up to 175 amps is 14 AWG (American  
Wire Gage) to 2/0.  
b. Incoming wire size range for terminal block with MCA from  
175.1 amps to 420 amps is 2 AWG to 600 kcmil.  
c. Incoming wire size range for non-fused disconnect with MCA  
up to 100 amps is 14 AWG to 1/0.  
d. Incoming wire size range for non-fused disconnect with MCA  
from 100.1 amp to 200 amps is 6 AWG to 350 kcmil.  
e. Incoming wire size range for non-fused disconnect with MCA  
from 200.1 amp to 450 amps is 3/0 to 500 kcmil.  
COOL1  
COOL2  
EAT  
— Thermostat Stage 1 (24-v)  
— Thermostat Stage 2 (24-v)  
— Evaporator Air Temperature Sensor  
— Energy Management Module  
EMM  
EQUIP GND — Equipment Ground  
FS1  
LLSV  
LVT  
NEC  
SA  
SAT  
SPT  
— Fan Status Switch (24-v)  
— Liquid Line Solenoid Valve  
— Low Voltage Terminal  
— National Electrical Code  
— Set Point Adjustment (T-56, T-59)  
— Supply Air Temperature Sensor  
— Space Temperature Sensor (T-55, T-56, T-59)  
Field Power Supply  
4. Terminals 1 and 2 of the LVT are for the alarm relay. The maxi-  
mum load allowed for the alarm relay is 5-va sealed and 10-va  
inrush at 24-v. Field power supply is not required.  
5. Refer to certified dimensional drawings for exact locations of  
the main power and control power entrance locations.  
6. Terminals 24, 25, and 2 of the LVT are for the control of the  
field-supplied LLSV. The maximum load allowed for the LLSV is  
15-va sealed and 30-va inrush at 24-v. Field power supply is not  
required.  
7. LLSV (24-v) should be 15-va maximum per valve as required.  
8. Not used on single circuit unit.  
9. Installation of fan status switch (FS1) is recommended.  
10. The contacts for remote ON/OFF, fan status, and demand limit  
options must be rated for dry circuit application capable of han-  
dling a 24-vac load up to 50 mA.  
Field Control Wiring  
NOTES:  
1. Factory wiring is in accordance with UL 1995 standards. Field  
modifications or additions must be in compliance with all appli-  
cable codes.  
2. All units or modules have single point primary power connec-  
tion. Main power must be supplied from a field or factory-  
supplied disconnect.  
30  
Table 9 — 38APS Standard Condenser Fan Electrical Data  
SUPPLY  
COMPRESSOR  
RLA  
CONDENSER FAN  
38APS UNIT  
SIZE  
REC  
FUSE  
VOLTAGE  
V-Ph-Hz  
MCA  
MOCP  
ICF  
Min  
Max  
Qty  
LRA  
Total Qty  
FLA  
208/230-3-60  
380-3-60  
187  
342  
414  
518  
342  
254  
418  
506  
632  
440  
48.1  
23.7  
18.6  
14.7  
18.6  
245  
145  
125  
100  
118  
6.6  
3.9  
3.3  
2.6  
3.3  
121.4  
61.1  
48.5  
38.3  
48.5  
150  
80  
150  
70  
60  
45  
60  
306.3  
176.5  
150.2  
119.9  
143.2  
025  
027  
030  
040  
050  
460-3-60  
2
2
2
2
3
3
60  
575-3-60  
380/415-3-50  
50  
60  
208/230-3-60  
380-3-60  
187  
342  
414  
518  
342  
254  
418  
506  
632  
440  
51.3  
26.9  
23.1  
19.9  
23.1  
300  
139  
150  
109  
140  
6.6  
3.9  
3.3  
2.6  
3.3  
128.6  
68.3  
58.6  
50.0  
58.6  
175  
90  
150  
80  
70  
60  
70  
364.5  
173.7  
179.7  
134.1  
169.7  
460-3-60  
2
2
3
3
80  
575-3-60  
60  
380/415-3-50  
80  
208/230-3-60  
380-3-60  
187  
342  
414  
518  
342  
254  
418  
506  
632  
440  
55.8  
34.0  
26.9  
23.7  
26.9  
340  
196  
179  
132  
174  
6.6  
3.9  
3.3  
2.6  
3.3  
138.8  
84.3  
67.1  
58.5  
67.1  
175  
110  
90  
80  
90  
175  
100  
80  
70  
80  
409.0  
237.8  
212.5  
160.9  
207.5  
460-3-60  
575-3-60  
380/415-3-50  
208/230-3-60  
380-3-60  
187  
342  
414  
518  
342  
254  
418  
506  
632  
440  
51.3  
26.9  
23.1  
19.9  
23.1  
300  
139  
150  
109  
140  
6.6  
3.9  
3.3  
2.6  
3.3  
186.5  
99.1  
85.0  
72.5  
85.0  
225  
125  
100  
90  
200  
110  
100  
80  
422.4  
204.5  
206.1  
156.6  
196.1  
460-3-60  
575-3-60  
380/415-3-50  
100  
100  
208/230-3-60  
380-3-60  
187  
342  
414  
518  
342  
254  
418  
506  
632  
440  
55.8  
34.0  
26.9  
23.7  
26.9  
340  
196  
179  
132  
174  
6.6  
3.9  
3.3  
2.6  
3.3  
201.2  
122.2  
97.3  
84.8  
97.3  
250  
150  
110  
100  
110  
225  
150  
110  
100  
110  
471.4  
275.7  
242.7  
187.2  
237.7  
460-3-60  
575-3-60  
380/415-3-50  
Table 10 — 38APS Low Sound Condenser Fan Electrical Data  
SUPPLY  
COMPRESSOR  
RLA  
CONDENSER FAN  
38APS UNIT  
SIZE  
REC  
FUSE  
VOLTAGE  
V-Ph-Hz  
MCA  
MOCP  
ICF  
Min  
Max  
Qty  
LRA  
Total Qty  
FLA  
208/230-3-60  
380-3-60  
187  
342  
414  
518  
342  
254  
418  
506  
632  
440  
48.1  
23.7  
18.6  
14.7  
18.6  
245  
145  
125  
100  
118  
6.0  
3.9  
2.9  
2.4  
2.9  
120.2  
61.1  
47.7  
37.9  
47.7  
150  
80  
150  
70  
305.1  
176.5  
149.4  
119.5  
142.4  
025  
027  
030  
040  
050  
460-3-60  
2
2
2
2
3
3
60  
60  
575-3-60  
380/415-3-50  
50  
60  
45  
60  
208/230-3-60  
380-3-60  
187  
342  
414  
518  
342  
254  
418  
506  
632  
440  
51.3  
26.9  
23.1  
19.9  
23.1  
300  
139  
150  
109  
140  
6.0  
3.9  
2.9  
2.4  
2.9  
127.4  
68.3  
57.8  
49.6  
57.8  
175  
90  
150  
80  
363.3  
173.7  
178.9  
133.7  
168.9  
460-3-60  
2
2
3
3
80  
70  
575-3-60  
60  
60  
380/415-3-50  
80  
70  
208/230-3-60  
380-3-60  
187  
342  
414  
518  
342  
254  
418  
506  
632  
440  
55.8  
34.0  
26.9  
23.7  
26.9  
340  
196  
179  
132  
174  
6.0  
3.9  
2.9  
2.4  
2.9  
137.6  
84.3  
66.3  
58.1  
66.3  
175  
110  
90  
80  
90  
175  
100  
80  
70  
80  
407.8  
237.8  
211.7  
160.5  
206.7  
460-3-60  
575-3-60  
380/415-3-50  
208/230-3-60  
380-3-60  
187  
342  
414  
518  
342  
254  
418  
506  
632  
440  
51.3  
26.9  
23.1  
19.9  
23.1  
300  
139  
150  
109  
140  
6.0  
3.9  
2.9  
2.4  
2.9  
184.7  
99.1  
83.8  
71.9  
83.8  
225  
125  
100  
90  
200  
110  
100  
80  
420.6  
204.5  
204.9  
156.0  
194.9  
460-3-60  
575-3-60  
380/415-3-50  
100  
100  
208/230-3-60  
380-3-60  
187  
342  
414  
518  
342  
254  
418  
506  
632  
440  
55.8  
34.0  
26.9  
23.7  
26.9  
340  
196  
179  
132  
174  
6.0  
3.9  
2.9  
2.4  
2.9  
199.4  
122.2  
96.1  
84.2  
96.1  
250  
150  
110  
100  
110  
225  
150  
110  
100  
110  
469.6  
275.7  
241.5  
186.6  
236.5  
460-3-60  
575-3-60  
380/415-3-50  
LEGEND  
4. Wiring for main field supply must be rated 75 C. Use copper conductors  
only.  
FLA  
ICF  
—
—
—
—
Full Load Amps  
a. Incoming wire size range for terminal block with MCA up to 175 amps is  
14 AWG (American Wire Gage) to 2/0.  
b. Incoming wire size range for terminal block with MCA from 175.1 amps  
to 420 amps is 2 AWG to 600 kcmil.  
c. Incoming wire size range for non-fused disconnect with MCA up to  
100 amps is 14 AWG to 1/0.  
d. Incoming wire size range for non-fused disconnect with MCA from  
100.1 amp to 200 amps is 6 AWG to 350 kcmil.  
e. Incoming wire size range for non-fused disconnect with MCA from  
200.1 amp to 450 amps is 3/0 to 500 kcmil.  
Maximum Instantaneous Current Flow  
Locked Rotor Amps  
LRA  
MCA  
Minimum Circuit Amps  
MOCP — Maximum Overcurrent Protection  
RLA  
—
Rated Load Amps  
NOTES:  
1. Units are suitable for use on electrical systems where voltage supplied to  
the unit terminals is not below or above the listed minimum and maximum  
limits. Maximum allowable phase imbalance is: voltage 2%; amps 10%.  
2. All units or modules have single point primary power connection. Main  
power must be supplied from a field-supplied disconnect.  
3. For MCA that is less than or equal to 380 amps, 3 conductors are  
required.  
For MCA between 381 and 760 amps, 6 conductors are required.  
Calculation of conductors required is based on 75 C copper wire.  
31  
Table 11 — 38APD Standard Condenser Fan Electrical Data  
COMPRESSOR  
CIRCUIT A CIRCUIT B  
Qty RLA LRA Qty RLA LRA  
CONDENSER FAN  
Total  
FLA  
Qty  
SUPPLY  
38APD  
UNIT  
SIZE  
REC  
FUSE  
VOLTAGE  
V-Ph-Hz  
MCA  
MOCP  
ICF  
Min Max  
208/230-3-60 187  
254  
418  
506  
632  
440  
254  
418  
506  
632  
440  
254  
418  
506  
632  
440  
254  
418  
506  
632  
440  
254  
418  
506  
632  
440  
254  
418  
506  
632  
440  
254  
418  
506  
632  
440  
254  
418  
506  
632  
440  
48.1  
23.7  
18.6  
14.7  
18.6  
51.3  
26.9  
23.1  
19.9  
23.1  
55.8  
34.0  
26.9  
23.7  
26.9  
35.8  
23.7  
17.9  
14.3  
17.9  
51.3  
26.9  
23.1  
19.9  
23.1  
51.3  
26.9  
23.1  
19.9  
23.1  
55.8  
34.0  
26.9  
23.7  
26.9  
55.8  
34.0  
26.9  
23.7  
26.9  
245  
145  
125  
100  
118  
300  
139  
150  
109  
140  
340  
196  
179  
132  
174  
48.1  
23.7  
18.6  
14.7  
18.6  
51.3  
26.9  
23.1  
19.9  
23.1  
55.8  
34.0  
26.9  
23.7  
26.9  
33.4  
19.2  
16.7  
13.4  
16.7  
51.3  
26.9  
23.1  
19.9  
23.1  
55.8  
34.0  
26.9  
23.7  
26.9  
46.1  
23.7  
18.6  
14.7  
18.6  
55.8  
34.0  
26.9  
23.7  
26.9  
245  
145  
125  
100  
118  
300  
139  
150  
109  
140  
340  
196  
179  
132  
174  
6.6  
3.9  
3.3  
2.6  
3.3  
6.6  
3.9  
3.3  
2.6  
3.3  
6.6  
3.9  
3.3  
2.6  
3.3  
6.6  
3.9  
3.3  
2.6  
3.3  
6.6  
3.9  
3.3  
2.6  
3.3  
6.6  
3.9  
3.3  
2.6  
3.3  
6.6  
3.9  
3.3  
2.6  
3.3  
6.6  
3.9  
3.3  
2.6  
3.3  
6.6  
3.9  
3.3  
2.6  
3.3  
6.6  
3.9  
3.3  
2.6  
3.3  
121.4  
61.1  
48.5  
38.3  
48.5  
128.6  
68.3  
58.6  
50.0  
58.6  
138.8  
84.3  
67.1  
58.5  
67.1  
167.2  
103.5  
83.6  
66.7  
83.6  
231.4  
119.6  
99.1  
82.0  
99.1  
254.6  
145.9  
119.9  
103.5  
119.9  
296.3  
163.2  
129.5  
107.8  
129.5  
326.0  
198.0  
157.7  
137.4  
157.7  
374.9  
214.6  
176.5  
152.3  
176.5  
150  
80  
150  
70  
306.3  
176.5  
150.2  
119.9  
143.2  
364.5  
173.7  
179.7  
134.1  
169.7  
409.0  
237.8  
212.5  
160.9  
207.5  
361.4  
218.9  
186.2  
128.8  
179.2  
467.3  
225.0  
220.2  
166.1  
210.2  
524.8  
299.4  
265.3  
205.9  
260.3  
566.5  
316.7  
274.9  
210.2  
269.9  
596.2  
351.5  
303.1  
239.8  
298.1  
380-3-60  
460-3-60  
575-3-60  
342  
414  
518  
025  
027  
030  
040  
050  
060  
070  
080  
090  
100  
1
1
1
2
2
2
2
2
3
3
1
1
1
2
2
2
3
3
3
3
2
2
2
3
3
4
4
5
6
6
60  
60  
50  
60  
45  
60  
380/415-3-50 342  
208/230-3-60 187  
175  
90  
150  
80  
380-3-60  
460-3-60  
575-3-60  
342  
414  
518  
80  
70  
60  
60  
380/415-3-50 342  
208/230-3-60 187  
80  
70  
175  
110  
90  
80  
90  
175  
100  
80  
70  
80  
175  
110  
90  
70  
90  
380-3-60  
460-3-60  
575-3-60  
342  
414  
518  
380/415-3-50 342  
208/230-3-60 187  
239  
145  
125  
80  
225  
140  
114  
80  
200  
125  
100  
80  
380-3-60  
460-3-60  
575-3-60  
342  
414  
518  
380/415-3-50 342  
208/230-3-60 187  
118  
111  
100  
300  
139  
150  
109  
140  
300  
139  
150  
109  
140  
340  
196  
179  
132  
174  
340  
196  
179  
132  
174  
300  
139  
150  
109  
140  
340  
196  
179  
132  
174  
300  
139  
150  
109  
140  
340  
196  
179  
132  
174  
245  
145  
125  
100  
118  
340  
196  
179  
132  
174  
340  
196  
179  
132  
174  
340  
196  
179  
132  
174  
250  
125  
110  
100  
110  
300  
175  
125  
125  
125  
300  
175  
150  
125  
150  
350  
225  
175  
150  
175  
400  
225  
200  
175  
200  
400  
250  
200  
175  
200  
250  
125  
110  
90  
380-3-60  
460-3-60  
575-3-60  
342  
414  
518  
380/415-3-50 342  
208/230-3-60 187  
110  
300  
175  
125  
110  
125  
300  
175  
150  
125  
150  
350  
225  
175  
150  
175  
400  
225  
200  
150  
200  
380-3-60  
460-3-60  
575-3-60  
342  
414  
518  
380/415-3-50 342  
208/230-3-60 187  
380-3-60  
460-3-60  
575-3-60  
342  
414  
518  
380/415-3-50 342  
208/230-3-60 187  
380-3-60  
460-3-60  
575-3-60  
342  
414  
518  
380/415-3-50 342  
208/230-3-60 187  
254  
418  
506  
632  
440  
254  
418  
506  
632  
440  
51.3  
26.9  
23.1  
19.9  
23.1  
55.8  
34.0  
26.9  
23.7  
26.9  
55.8  
34.0  
26.9  
23.7  
26.9  
55.8  
34.0  
26.9  
23.7  
26.9  
645.1  
368.1  
321.9  
254.7  
311.9  
658.6  
389.4  
333.3  
266.1  
328.3  
380-3-60  
460-3-60  
575-3-60  
342  
414  
518  
380/415-3-50 342  
208/230-3-60 187  
388.4  
235.9  
187.9  
163.7  
187.9  
400  
250  
200  
175  
200  
380-3-60  
460-3-60  
575-3-60  
342  
414  
518  
380/415-3-50 342  
LEGEND  
4. Wiring for main field supply must be rated 75 C. Use copper  
conductors only.  
FLA — Full Load Amps  
a. Incoming wire size range for terminal block with MCA up to  
175 amps is 14 AWG (American Wire Gage) to 2/0.  
b. Incoming wire size range for terminal block with MCA from  
175.1 amps to 420 amps is 2 AWG to 600 kcmil.  
c. Incoming wire size range for non-fused disconnect with MCA  
up to 100 amps is 14 AWG to 1/0.  
d. Incoming wire size range for non-fused disconnect with MCA  
from 100.1 amp to 200 amps is 6 AWG to 350 kcmil.  
e. Incoming wire size range for non-fused disconnect with MCA  
from 200.1 amp to 450 amps is 3/0 to 500 kcmil.  
ICF — Maximum Instantaneous Current Flow  
LRA — Locked Rotor Amps  
MCA — Minimum Circuit Amps  
MOCP— Maximum Overcurrent Protection  
RLA — Rated Load Amps  
NOTES:  
1. Units are suitable for use on electrical systems where voltage  
supplied to the unit terminals is not below or above the listed  
minimum and maximum limits. Maximum allowable phase  
imbalance is: voltage 2%; amps 10%.  
2. All units or modules have single point primary power connec-  
tion. Main power must be supplied from a field-supplied  
disconnect.  
3. For MCA that is less than or equal to 380 amps, 3 conductors  
are required.  
For MCA between 381 and 760 amps, 6 conductors are  
required.  
Calculation of conductors required is based on 75 C copper  
wire.  
32  
Table 12 — 38APD Low Sound Condenser Fan Electrical Data  
COMPRESSOR  
CIRCUIT A CIRCUIT B  
Qty RLA LRA Qty RLA LRA  
CONDENSER FAN  
Total  
FLA  
Qty  
SUPPLY  
38APD  
UNIT  
SIZE  
REC  
FUSE  
VOLTAGE  
V-Ph-Hz  
MCA  
MOCP  
ICF  
Min Max  
208/230-3-60 187  
254  
418  
506  
632  
440  
254  
418  
506  
632  
440  
254  
418  
506  
632  
440  
254  
418  
506  
632  
440  
254  
418  
506  
632  
440  
254  
418  
506  
632  
440  
254  
418  
506  
632  
440  
254  
418  
506  
632  
440  
48.1  
23.7  
18.6  
14.7  
18.6  
51.3  
26.9  
23.1  
19.9  
23.1  
55.8  
34.0  
26.9  
23.7  
26.9  
35.8  
23.7  
17.9  
14.3  
17.9  
48.1  
23.7  
18.6  
14.7  
18.6  
51.3  
26.9  
23.1  
19.9  
23.1  
55.8  
34.0  
26.9  
23.7  
26.9  
55.8  
34.0  
26.9  
23.7  
26.9  
245  
145  
125  
100  
118  
300  
139  
150  
109  
140  
340  
196  
179  
132  
174  
48.1  
23.7  
18.6  
14.7  
18.6  
51.3  
26.9  
23.1  
19.9  
23.1  
55.8  
34.0  
26.9  
23.7  
26.9  
33.4  
19.2  
16.7  
13.4  
16.7  
51.3  
26.9  
23.1  
19.9  
23.1  
55.8  
34.0  
26.9  
23.7  
26.9  
46.1  
23.7  
18.6  
14.7  
18.6  
55.8  
34.0  
26.9  
23.7  
26.9  
245  
145  
125  
100  
118  
300  
139  
150  
109  
140  
340  
196  
179  
132  
174  
6.0  
3.9  
2.9  
2.4  
2.9  
6.0  
3.9  
2.9  
2.4  
2.9  
6.0  
3.9  
2.9  
2.4  
2.9  
6.0  
3.9  
2.9  
2.4  
2.9  
6.0  
3.9  
2.9  
2.4  
2.9  
6.0  
3.9  
2.9  
2.4  
2.9  
6.0  
3.9  
2.9  
2.4  
2.9  
6.0  
3.9  
2.9  
2.4  
2.9  
6.0  
3.9  
2.9  
2.4  
2.9  
6.0  
3.9  
2.9  
2.4  
2.9  
120.2  
61.1  
47.7  
37.9  
47.7  
127.4  
68.3  
57.8  
49.6  
57.8  
137.6  
84.3  
66.3  
58.1  
66.3  
165.4  
103.5  
82.4  
66.1  
82.4  
229.6  
119.6  
97.9  
81.4  
97.9  
252.2  
145.9  
118.3  
102.7  
118.3  
293.9  
163.2  
127.9  
107.0  
127.9  
323.0  
198.0  
155.7  
136.4  
155.7  
371.3  
214.6  
174.1  
151.1  
174.1  
150  
80  
150  
70  
305.1  
176.5  
149.4  
119.5  
142.4  
363.3  
173.7  
178.9  
133.7  
168.9  
407.8  
237.8  
211.7  
160.5  
206.7  
359.6  
218.9  
185.0  
128.2  
178.0  
465.5  
225.0  
219.0  
165.5  
212.0  
522.4  
299.4  
263.7  
205.1  
253.7  
564.1  
316.7  
273.3  
209.4  
268.3  
587.2  
347.6  
298.2  
236.4  
293.2  
380-3-60  
460-3-60  
575-3-60  
342  
414  
518  
025  
027  
030  
040  
050  
060  
070  
080  
090  
100  
1
1
1
2
2
2
2
2
3
3
1
1
1
2
2
2
3
3
3
3
2
2
2
3
3
4
4
5
6
6
60  
60  
50  
60  
45  
60  
380/415-3-50 342  
208/230-3-60 187  
175  
90  
150  
80  
380-3-60  
460-3-60  
575-3-60  
342  
414  
518  
80  
70  
60  
60  
380/415-3-50 342  
208/230-3-60 187  
80  
70  
175  
110  
90  
80  
90  
175  
100  
80  
70  
80  
175  
110  
90  
70  
90  
380-3-60  
460-3-60  
575-3-60  
342  
414  
518  
380/415-3-50 342  
208/230-3-60 187  
239  
145  
125  
80  
225  
140  
114  
80  
200  
125  
100  
80  
380-3-60  
460-3-60  
575-3-60  
342  
414  
518  
380/415-3-50 342  
208/230-3-60 187  
118  
111  
100  
245  
145  
125  
100  
118  
300  
139  
150  
109  
140  
340  
196  
179  
132  
174  
340  
196  
179  
132  
174  
300  
139  
150  
109  
140  
340  
196  
179  
132  
174  
300  
139  
150  
109  
140  
340  
196  
179  
132  
174  
245  
145  
125  
100  
118  
340  
196  
179  
132  
174  
340  
196  
179  
132  
174  
340  
196  
179  
132  
174  
250  
125  
110  
100  
110  
300  
175  
125  
125  
125  
300  
175  
150  
125  
150  
350  
225  
175  
150  
175  
400  
225  
200  
175  
200  
400  
250  
200  
175  
200  
250  
125  
110  
90  
380-3-60  
460-3-60  
575-3-60  
342  
414  
518  
380/415-3-50 342  
208/230-3-60 187  
110  
300  
175  
125  
110  
125  
300  
175  
150  
125  
150  
350  
225  
175  
150  
175  
400  
225  
200  
150  
200  
380-3-60  
460-3-60  
575-3-60  
342  
414  
518  
380/415-3-50 342  
208/230-3-60 187  
380-3-60  
460-3-60  
575-3-60  
342  
414  
518  
380/415-3-50 342  
208/230-3-60 187  
380-3-60  
460-3-60  
575-3-60  
342  
414  
518  
380/415-3-50 342  
208/230-3-60 187  
254  
418  
506  
632  
440  
254  
418  
506  
632  
440  
51.3  
26.9  
23.1  
19.9  
23.1  
55.8  
34.0  
26.9  
23.7  
26.9  
55.8  
34.0  
26.9  
23.7  
26.9  
55.8  
34.0  
26.9  
23.7  
26.9  
641.5  
368.1  
319.5  
253.5  
309.5  
655.0  
389.4  
330.9  
264.9  
325.9  
380-3-60  
460-3-60  
575-3-60  
342  
414  
518  
380/415-3-50 342  
208/230-3-60 187  
384.8  
235.9  
185.5  
162.5  
185.5  
400  
250  
200  
175  
200  
380-3-60  
460-3-60  
575-3-60  
342  
414  
518  
380/415-3-50 342  
LEGEND  
4. Wiring for main field supply must be rated 75 C. Use copper  
conductors only.  
FLA — Full Load Amps  
a. Incoming wire size range for terminal block with MCA up to  
175 amps is 14 AWG (American Wire Gage) to 2/0.  
b. Incoming wire size range for terminal block with MCA from  
175.1 amps to 420 amps is 2 AWG to 600 kcmil.  
c. Incoming wire size range for non-fused disconnect with MCA  
up to 100 amps is 14 AWG to 1/0.  
d. Incoming wire size range for non-fused disconnect with MCA  
from 100.1 amp to 200 amps is 6 AWG to 350 kcmil.  
e. Incoming wire size range for non-fused disconnect with MCA  
from 200.1 amp to 450 amps is 3/0 to 500 kcmil.  
ICF — Maximum Instantaneous Current Flow  
LRA — Locked Rotor Amps  
MCA — Minimum Circuit Amps  
MOCP— Maximum Overcurrent Protection  
RLA — Rated Load Amps  
NOTES:  
1. Units are suitable for use on electrical systems where voltage  
supplied to the unit terminals is not below or above the listed  
minimum and maximum limits. Maximum allowable phase  
imbalance is: voltage 2%; amps 10%.  
2. All units or modules have single point primary power connec-  
tion. Main power must be supplied from a field-supplied  
disconnect.  
3. For MCA that is less than or equal to 380 amps, 3 conductors  
are required.  
For MCA between 381 and 760 amps, 6 conductors are  
required.  
Calculation of conductors required is based on 75 C copper  
wire.  
33  
Table 13 — Unit Incoming Power Options  
UNIT INCOMING POWER OPTION  
Standard Terminal  
Block Option  
Standard and High SCCR  
Disconnect Option  
High SCCR Terminal Block Option  
MOCP VALUE  
100 A or less  
Greater than  
100 A and Less than  
or Equal to 200 A  
Max  
Wire Size  
Min  
Wire Size  
Max  
Wire Size  
Min  
Wire Size  
High SCCR  
Fuse Type  
Min  
Wire Size  
Max Wire Size  
2/0  
#14 AWG  
#14 AWG  
2/0  
#6 AWG  
#6 AWG  
J, RK1, or RK5  
1/0  
#14 AWG  
2/0  
2/0  
J or RK1  
J or RK1  
350 kcmil  
#6 AWG  
500 kcmil (1)  
500 kcmil (2)  
Greater than 200  
600 kcmil  
#2  
600 kcmil  
3/0  
3/0  
LEGEND  
AWG — American Wire Gage  
kcmil — Thousand Circular Mills  
MOCP — Maximum Overcurrent Protection  
SCCR — Short Circuit Current Rating  
NOTES:  
1. Terminal block high SCCR option units must use approved  
fuses to meet high SCCR rating.  
2. High SCCR disconnect option units can use either approved  
fuse or circuit breaker for incoming power protection.  
3. Time delay fuse type required.  
MISCELLANEOUS ACCESSORIES — Energy manage-  
ment module, Navigator™ display, remote enhanced display,  
Touch Pilot™ display, BACnet™ translator control, LON (lo-  
cal operating network) translator control, and long line acces-  
sory kit are available for special applications.  
Step 5 — Install Accessories  
LOW-AMBIENT OPERATION — If operating temperatures  
below those found in Table 14 are expected, Motormaster® V  
fan motor control is recommended.  
Table 14 — 38AP Unit Low Ambient Limitations  
Single Circuit  
MINIMUM LOW  
AMBIENT  
(Standard Unit)  
MINIMUM LOW AMBIENT  
MOTORMASTER® CONTROL  
(Factory-Installed Option)  
38APS  
UNIT SIZE  
025-050  
45 F (7.2 C)  
–20 F (–28.9 C)  
Dual Circuit  
MINIMUM LOW  
AMBIENT  
(Standard Unit)  
MINIMUM LOW AMBIENT  
MOTORMASTER CONTROL  
(Factory-Installed Option)  
38APD  
UNIT SIZE  
025-040  
050-060  
070-100  
32 F (0 C)  
25 F (–3.9 C)  
32 F (0 C)  
–20 F (–28.9 C)  
–20 F (–28.9 C)  
–20 F(–28.9 C)  
34  
Copyright 2009 Carrier Corporation  
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.  
Catalog No. 04-53380002-01  
Printed in U.S.A.  
Form 38AP-1SI  
Pg 36  
8-09  
Replaces: New  

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