Carrier 38AH044-084 User Manual
Air-Cooled Condensing Units
Installation, Start-Up and
Service Instructions
38AH044-134
50/60 Hz
CONTENTS
SAFETY CONSIDERATIONS ................ 1
INSTALLATION ............................ 1-37
Step 1 — Rig and Place Unit ............... 1
• DOMESTIC UNITS
• EXPORT UNITS
• PLACING UNITS
Step 2 — Check Compressor Mounting ..... 3
• UNITS 38AH044-084
• UNITS 38AH094-134
Step 3 — Make Refrigerant Piping
Connections .............................. 14
• UNITS 38AH044-084
• UNITS 38AH094-134
Step 4 — Make Electrical Connections ...... 23
• POWER SUPPLY
• FIELD POWER CONNECTIONS
• MAIN POWER
• CONTROL CIRCUIT WIRING
Step 5 — Install Accessories ............... 37
• LOW-AMBIENT OPERATION
• MISCELLANEOUS ACCESSORIES
PRE-START-UP .......................... 37,38
START-UP ................................38-45
SERVICE ..................................46-49
CONTROL ................................49-52
TROUBLESHOOTING ......................53,54
START-UP CHECKLIST ...............CL-1, CL-2
Page
SAFETY CONSIDERATIONS
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.
Untrained personnel can perform basic maintenancefunctions, 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.
• Follow all safety codes.
• Wear safety glasses and work gloves.
• Use care in handling, rigging, and setting bulky
equipment.
ELECTRIC SHOCK HAZARD.
Open all remote disconnects before servicing
this equipment.
INSTALLATION
Step 1 — Rig and Place Unit —
designed for overhead rigging, and it is important that this
method be used. Lifting holes are provided in the frame base
rails, which are marked for rigging (see rigging label on the
unit and Tables 1, 2A, and 2B for rigging weights and center
of gravity). It is recommended that field-supplied pipes, of
sufficient length to extend at least 12-in. (305 mm) beyond
the frame, be passed through the holes.
To maintain unit stability while lifting, use 4 cables,
chains, or straps of equal length. Attach one end of
each cable to one pipe end and the other end of each
cable to the overhead rigging point.
Use spreader bars or frame to keep the cables, chains,
and straps clear of the unit sides. Leave standard coil pro-
tection packaging in place during rigging to provide protection to coils. Remove and discard all coil protection after
rigging cables are detached.
DOMESTIC UNITS — For units 38AH044-084, 124, and
134; standard unit packaging consists of coilprotection only.
There is no standard packaging provided for units 38AH094
and 104. Skids are not provided. If overhead rigging is not
available at the jobsite,place the unit on a skid or pad before
dragging or rolling. When rolling, use a minimum of
3 rollers. When dragging, pull the pad or skid. Do not apply
force to the unit. When in final position, raise from above to
lift unit off the pad or skid.
EXPORT UNITS — All export units are mounted on skids
with vertical coil protection. Leave the unit on the skid until
it is in final position. Whileon the skid, the unit can be rolled
or skidded. Apply force to the skid, not to the unit. Use a
minimum of 3 rollers when rolling. When in final position,
raise from above to remove the skid.
PLACING UNITS
Units 38AH044-084 — RefertoFig.1and 2 for airflow clear-
ances. Recommended minimum clearances are 6 ft (1829 mm)
for unrestricted airflow and service on sides of unit, 5 ft
(1524 mm) on ends, and unrestricted clear air space above
the unit. Provide ample space to connect liquid and suction
lines to indoor unit. For multiple units, allow 8 ft(2440 mm)
separation between units for airflow and service.
Do not forklift these units unless the unit is attached to
a skid designed for forklifting.
All units are
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1
Tab 3a
PC 111 Catalog No. 563-704 Printed in U.S.A. Form 38AH-15SI Pg 1 10-98 Replaces: 38AH-14SI
The placement area must be level and strong enough to
support the operating weight of the unit (see Table 3A or
3B). When unit is in proper location, use of mounting holes
in base rails is recommended for securing unit to supporting
structure. For mounting unit on vibration isolators, a perimeter support channel between the unit and the isolators is
recommended. Fasteners for mounting unit are field supplied. Be sure to mount unit level to ensure proper oil return
to compressors.
Units 38AH094-134 — Refer to Fig. 3-6 for airflow
clearances. Recommended minimum clearances are 6 ft
(1829 mm) for unrestricted airflow and service on sides of
unit, 5 ft (1524 mm) on ends, and unrestricted clear air space
above unit. Provide ample space to connect liquid and suction lines to indoor unit. For multiple units, allow
8 ft (2440 mm) separation between units for airflow and
service.
Do not forklift these units unless the unit is attached to
a skid designed for forklifting.
The placement area must be level and strong enough to
support the operating weight of the unit. See Table 4A
or 4B. Refer to the following paragraphs for theproperplacement of the unit.
Units 38AH094,104 — For mounting units on vibration isolators, a perimeter support channel is required between the
unit and the support isolators. The perimeter support channel must be sizedto support the fully assembled unit. Do not
support units on individual isolationsupports. Support channel, hardware, and fasteners are field supplied. When unit is
in proper location, level unit and bolt intoposition with fieldsupplied bolts.
Units 38AH124,134 — For ease of shipment and handling,
unit 38AH124 is shipped as 2 modules (124A and 124B)
and unit 38AH134 is shipped as 2 modules (134Aand 134B).
The modules must be connected at the final installation site
with thefactory-shippedpipingandsheet metal trim kit mounted
on Module 124A or 134A. See Fig. 7.
Do not move assembled 38AH124 or 134 units as a single
assembly. Always move modules individually during installation or at any other time.
Mark installation site for placement of Modules 124A and
124B or Modules 134A and 134B. See Table 4A or 4B for
final assembled dimensions. A service space of 24 in.
(610 mm) is required between the 2 modules for piping and
sheet metal trim installation.
Place Module 124Aor 134Ain position, ensuring that the
control box is at the end opposite the service space. See
Fig. 8.
Remove sheet metal and tubing from Module 124Aor 134A
sheet metal trim kit (Fig. 7). Remove sheet metal cover panels from return-bend end of unit facing the service space.
See Fig. 8. These panels may be discarded or saved for
reinstallation if module is moved from site. See Fig. 9.
Table 1 — Rigging Center of Gravity — in. (mm)
UNIT
38AH
Dimension X 49 (1232) 48 (1224) 50 (1260) 57 (1443) 57 (1448) 66 (1676) 63 (1600) 50 (1260) — 50 (1260) —
Dimension Y 39 (984) 39 (978) 38 (968) 39 (993) 39 (991) 31 (787) 34 (851) 38 (968) — 38 (968) —
Dimension X-C 49 (1234) 48 (1229) 50 (1261) 56 (1425) 56 (1422) 66 (1676) 63 (1600) 50 (1260) — 50 (1260) —
Dimension Y-C 39 (993) 39 (991) 39 (986) 40 (1006) 40 (1008) 31 (787) 34 (851) 39 (986) — 39 (986) —
Dimension K ————————50(1260) — 57 (1443)
Dimension L ————————38(968) — 39 (993)
Dimension K-C ————————50(1260) — 56 (1425)
Dimension L-C ————————39(986) — 40 (1006)
LEGEND
——Not Applicable
C—Copper Fin Coils
044 054 064 074 084 094 104
TOP VIEW, TYPICAL
MODULE
124A
124, 134 ONLY
MODULE
124B
MODULE
134A
MODULE
134B
2
Remove sheet metal cover panels fromreturn-bend end of
Module 124B or 134B. Place Module 124B or 134B in
position. The exposed return-bend ends of each module are
now opposite each other and facing the service space. The
compressors of each module are on opposite sidesofthe unit.
IMPORTANT: Modules must be placed 24 in.
(610 mm) apart and square relative to each other.
The modules are now in position for piping installation and final assembly. See Fig. 8. For mounting units on
vibration isolators, a perimeter support channel is required
between the assembled unit and the support isolators. The
perimeter support channel must be sized to support the fully
assembled unit. Do not support modules on individual isolation supports. Support channel, hardware, and fastenersare
field supplied.
When unit is in proper location, level unit and bolt into
position with field-supplied bolts.
Step 2 — Check Compressor Mounting
UNITS 38AH044-084 — Compressors are mountedon pans
and are held down by 4 bolts during shipment. After unit is
installed, loosen each of these bolts until the snubber washer
can be moved with finger pressure. See Fig. 10.
UNITS 38AH094-134 — Units 38AH094 and104 compressors are mounted on rails and held down by rail bolts during
shipment. After unit is installed, loosen the rail bolts to allow the rails and compressors to float freely on the springs
located under the rails. See Fig. 10.
Units 38AH124 and 134 compressors are mounted on pans
and are held down by 4 bolts during shipment. After unit is
installed, loosen each of these bolts untilsnubber washer can
be moved with finger pressure. See Fig. 10.
Table 2A — Operational Corner Weights with
Refrigerant Charge (Approximate) — Lb
UNIT
38AH
044 3259 939 893 695 732
044C 3547 1013 967 765 802
054 3309 964 905 697 742
054C 3597 1034 978 771 814
064 3565 1018 1011 765 771
064C 3998 1125 1117 874 879
074 3812 1146 986 777 903
074C 4229 1272 1059 862 1035
084 4057 1220 1049 827 961
084C 4735 1425 1186 965 1159
094 5088 1114 2192 1182 601
094C 5813 1273 2504 1350 686
104 5435 1240 2138 1302 755
104C 6160 1405 2423 1476 856
MODULE
38AH
124A 3630 1037 1030 779 785
124A-C 4063 1144 1137 889 894
124B 3630 1037 1030 779 785
124B-C 4063 1144 1137 889 894
134A 3630 1037 1030 779 785
134A-C 4063 1144 1137 889 894
134B 3877 1167 997 789 924
134B-C 4294 1293 1080 874 1047
C—Copper Fin Coils
NOTE:Totalweight may differ fromsummationof corner weights due
to rounding of numerals.
TOTAL
WEIGHT
LEGEND
OPERATIONAL CORNER WEIGHT
ABCD
Table 2B — Operational Corner Weights with
Refrigerant Charge (Approximate) — Kg
UNIT
38AH
044 1478 426 405 316 332
044C 1609 460 438 347 364
054 1501 437 411 316 337
054C 1632 469 444 350 369
064 1617 462 459 347 350
064C 1813 510 508 397 399
074 1729 520 447 352 410
074C 1918 577 481 391 470
084 1840 553 476 375 436
084C 2148 646 538 438 526
094 2308 505 994 536 272
094C 2637 577 1136 612 311
104 2465 562 970 591 342
104C 2794 637 1099 670 388
MODULE
38AH
124A 1647 470 467 353 356
124A-C 1843 519 516 403 405
124B 1647 470 467 353 356
124B-C 1843 519 516 403 405
134A 1647 470 467 353 356
134A-C 1843 519 516 403 405
134B 1759 529 452 358 419
134B-C 1948 587 490 396 475
C—Copper Fin Coils
NOTE:Totalweight may differ fromsummationof corner weights due
to rounding of numerals.
TOTAL
WEIGHT
LEGEND
OPERATIONAL CORNER WEIGHT
ABCD
TOP VIEW, TYPICAL
3
SUCTION
CONNECTION(S)
LIQUID
CONNECTION(S)
21⁄89 Dia [54 mm] 25⁄89 Dia [67 mm]
7
SUCTION C 28-
LIQUID D 18-10
SUCTION (Ckt A) 18-7
SUCTION (Ckt B) 28-
LIQUID (Ckt A) 28-5
LIQUID (Ckt B) 28-10
DUAL CKT SINGLE CKT
⁄89 Dia [22 mm] 11⁄89 Dia [29 mm]
11
⁄169 [627mm] 18-105⁄169 [567mm]
1
⁄169 [561mm] 18-105⁄169 [567mm]
13
⁄169 [503mm] 28-5⁄89 [626mm]
5
⁄89 [626mm] —
3
⁄49 [756mm] 28-105⁄89 [879mm]
5
⁄89 [879mm] —
Chart 1, Field Power Supply Connections
UNIT VOLTAGE Hz DIAMETER — in. [mm] QTY
044 230 50 3
044, 054
208/230 60 3
346, 380/415 50 2
044, 054, 064 460,575,380 60 2
064
C—Copper Fin Coils
MTG — Mounting
SAE — Society of Automotive Engineers
NOTES:
1. The approximate operating weight of the unit is:
38AH-044--- 3259 lb [1478 kg]
38AH-044--C 3547 lb [1609 kg]
38AH-054--- 3309 lb [1501 kg]
38AH-054--C 3597 lb [1632 kg]
38AH-064--- 3565 lb [1617 kg]
38AH-064--C 3998 lb [1813 kg]
2. Unit must have clearances for airflow as follows:
Top — Do not restrict in any way.
Ends—5ft[1524 mm]
Sides—6ft[1829 mm]
3. Mounting holes may be used to mountunit to concrete pad. They are not recommended for mounting
unit to spring isolators. If spring isolators are used, a perimeter support channel between the unit and
the isolators is recommended.
4. One 3
5. See Table1 forrigging center ofgravity (DimensionsX,Y). SeeTable2Aand 2B for A-Dcorner weights.
6. Circled numerals in Top View refer to condenser fans by position.
208/230 60 2
346, 380/415 50 3
LEGEND
5
⁄89 (92mm) diameter holeis recommendedfor single-entry poweron size 064(208/230-v) units.
5
⁄8[92] 1
5
⁄8[92] 1
1
⁄2[63] 1
1
⁄2[63] 1
1
⁄2[63] 2
5
⁄8[92] 1
Fig. 1 — Dimensions — Units 38AH044,054,064
4
SUCTION
CONNECTION(S)
LIQUID
CONNECTION(S)
21⁄89 Dia [54 mm] 25⁄89 Dia [67 mm]
7
SUCTION C 28-
LIQUID D 18-10
SUCTION (Ckt A) 18-7
SUCTION (Ckt B) 28-
LIQUID (Ckt A) 28-5
LIQUID (Ckt B) 28-10
DUAL CKT SINGLE CKT
⁄89 Dia [22 mm] 11⁄89 Dia [29 mm]
11
⁄169 [627mm] 18-105⁄169 [567mm]
1
⁄169 [561mm] 18-105⁄169 [567mm]
13
⁄169 [503mm] 28-5⁄89 [626mm]
5
⁄89 [626mm] —
3
⁄49 [756mm] 28-105⁄89 [879mm]
5
⁄89 [879mm] —
Chart 1, Field Power Supply Connections
UNIT VOLTAGE Hz DIAMETER — in. [mm] QTY
074
208/230 60 2
460 60 2
346, 380/415 50 3
074, 084
380 60 3
575 60 2
084
208/230 60 3
460 60 3
1
⁄2[63] 2
1
⁄2[63] 1
5
⁄8[92] 1
5
⁄8[92] 1
1
⁄2[63] 1
5
⁄8[92] 2
5
⁄8[92] 1
LEGEND
C—Copper Fin Coils
MTG — Mounting
SAE — Society of Automotive Engineers
NOTES:
1. The approximate operating weight of the unit is:
38AH-074--- 3812 lb (1729 kg)
38AH-074--C 4229 lb (1918 kg)
38AH-084--- 4057 lb (1840 kg)
38AH-084--C 4735 lb (2148 kg)
2. Unit must have clearances for airflow as follows:
Top — Do not restrict in any way.
Ends—5ft[1524 mm]
Sides—6ft[1829 mm]
3. Mounting holes maybe used to mountunit to concrete pad. They are notrecommended for mounting unit
to spring isolators. If spring isolators are used, a perimeter support channel between the unit and the isolators is recommended.
4. See Table 1 for rigging center of gravity (Dimensions X,Y). See Table 2A and 2B for A-D corner weights.
5. Circled numerals in Top View refer to condenser fans by position.
Fig. 2 — Dimensions — Units 38AH074,084
5
Chart 1, Field Power Supply Connections
UNIT
38AH
VOLTAGE Hz DIAMETER — in. (mm) QUANTITY
208/230 60 3
460, 575,
094
380
346, 380/415 50 3
60 3
5
5
5
⁄8(92) 2
⁄8(92) 1
⁄8(92) 1
Fig. 3 — Dimensions — Unit 38AH094
LEGEND
C—Copper Fin Coils
MTG — Mounting
SAE — Society of Automotive Engineers
NOTES:
1. The approximate operating weight of the unit is:
38AH-094--- 5088 lb (2308 kg)
38AH-094--C 5813 lb (2637 kg)
2. Unit must have clearances for airflow as follows:
Top — Do not restrict in any way.
Ends—5ft[1524 mm]
Sides—6ft[1829 mm]
3. Mounting holes may be used to mount unit to concrete pad. They are not
recommended for mounting unit to spring isolators.
5
4. Two 3
5. Circled numerals in Top View refer to condenser fans by position.
6. If spring isolators are used, a perimeter support channel between the unit
7. See Table 1 for rigging center of gravity (Dimensions X,Y). See Table 2A
⁄89 (92-mm) dia holes are recommended for parallel conductors on
208/230 v units.
and the isolators is recommended.
and 2B for A-D corner weights.
6
Chart 1, Field Power Supply Connections
UNIT
38AH
VOLTAGE Hz DIAMETER — in. (mm) QUANTITY
208/230 60 3
104
460, 575,
380
60 3
346, 380/415 50 3
5
⁄8(92) 2
5
⁄8(92) 1
5
⁄8(92) 1
Fig. 4 — Dimensions — Unit 38AH104
LEGEND
C—Copper Fin Coils
MTG — Mounting
SAE — Society of Automotive Engineers
NOTES:
1. The approximate operating weight of the unit is:
38AH-104--- 5435 lb (2465 kg)
38AH-104--C 6160 lb (2794 kg)
2. Unit must have clearances for airflow as follows:
Top — Do not restrict in any way.
Ends—5ft[1524 mm]
Sides—6ft[1829 mm]
3. Mounting holes may be used to mount unit to concrete pad. They are not
recommended for mounting unit to spring isolators.
5
4. Two 3
5. Circled numerals in Top View refer to condenser fans by position.
6. If spring isolators are used, a perimeter support channel between the unit
7. See Table 1 for rigging center of gravity (Dimensions X,Y). See Table 2A
⁄89 (92-mm) dia holes are recommended for parallel conductors on
208/230 v units.
and the isolators is recommended.
and 2B for A-D corner weights.
7
Chart 1, Field Power Supply Connections
UNIT
38AH
VOLTAGE Hz
208/230 60 3
124A
124B
460, 575,
380
346, 380/415 50 3
LEGEND
C—Copper Fin Coils
MTG — Mounting
SAE — Society of Automotive Engineers
DIAMETER
60 2
(in.)
5
⁄8(92) 1
1
⁄2(63) 1
5
⁄8(92) 1
NOTES:
1. The approximate operating weight of the unit is:
QUANTITY
38AH-124--- 7260 lb (3293 kg)
38AH-124--C 8126 lb (3686 kg)
2. Unit must have clearances for airflow as follows:
Top — Do not restrict in any way.
Ends—5ft[1524 mm]
Sides—6ft[1829 mm]
3. Mounting holes may be usedto mount unit to concrete pad. They are notrecommended for mounting unit to spring isolators.
5
4. One 3
5. Circled numerals in Top View refer to condenser fans by position.
6. If spring isolatorsare used, a perimeter support channelbetween the unit and
7. Each module ofthe unit must berigged into position separately.The unit must
8. Suction and liquid connections can exit on either side of the unit.
9. Field power supply connections are required for each module.
10. See Table 1 for rigging center of gravity (Dimensions K,L,X,Y). See Table 2A
⁄89 (92-mm) dia hole is recommended for single-entry power into each
module (124A and 124B) of the 208/230-v units.
the isolators is recommended. Do not support each module separately.
not be rigged after modules have been connected.
and 2B for A-D corner weights.
Fig. 5 — Dimensions — Unit 38AH124
8
Chart 1, Field Power Supply Connections
UNIT
38AH
134A
134B
C—Copper Fin Coils
MTG — Mounting
SAE — Society of Automotive Engineers
VOLTAGE Hz
208/230 60 3
460, 575, 380 60 2
346, 380/415 50 3
208/230 60 2
460, 575 60 2
380 60 3
346, 380/415 50 3
LEGEND
DIAMETER —
in. (mm)
5
⁄8(92) 1
1
⁄2(63) 1
5
⁄8(92) 1
1
⁄2(63) 2
1
⁄2(63) 1
5
⁄8(92) 1
5
⁄8(92) 1
Fig. 6 — Dimensions — Unit 38AH134
QUANTITY
NOTES:
1. The approximate operating weight of the unit is:
38AH-134--- 7507 lb (3405 kg)
38AH-134--C 8357 lb (3791 kg)
2. Unit must have clearances for airflow as follows:
Top — Do not restrict in any way.
Ends—5ft[1524 mm]
Sides—6ft[1829 mm]
3. Mounting holes may be used to mount unit to concrete pad. They are not
recommended for mounting unit to spring isolators.
5
4. One 3
5. Circled numerals in Top View refer to condenser fans by position.
6. If spring isolators are used, a perimeter support channel between the as-
7. Each module of the unit must be rigged into position separately. The unit
8. Suction and liquid connections can exit on either side of the unit.
9. Field power supply connections are required for each module.
10. See Table1A or1B for rigging centerof gravity (DimensionsK,L,X,Y). See
⁄89 (92-mm) dia hole is recommended for single-entry power into
Module 134Aand 208/230-vunits.Single entry powerinto Module 134Bis
not recommended.
sembled unitand theisolators isrecommended.Do notsupport eachmodule separately.
must not be rigged after modules have been connected.
Table 2A and 2B for A-D corner weights.
9
Table 3A — Units 38AH044-084 Physical Data — 50/60 Hz (English)
38AH 044 054 064 074 084
OPERATING WEIGHT WITH Cu-Al 3259 3309 3565 3812 4057
REFRIGERANT (Approx) — Lb Cu-Cu 3547 3597 3998 4229 4735
SHIP WEIGHT WITH COIL PROTECTION ONLY
(Approx) — Lb Cu-Al 3250 3290 3530 3780 4000
TYPICAL OPERATING REFRIGERANT R-22
Charge (Approx) — Lb 62 72 88 104 130
Qty of Circuits Std 22222
COMPRESSOR Type...Rpm Reciprocating Semi-Hermetic...1750 @ 60 Hz; 1458 @ 50 Hz
(Qty Cylinder) Compressor* Std (4) A1 (4) B1 (4) A1 (6) B1 (6) A1 (6) B1 (6) A1 (6) B1 (6) A1 (6) B1
Model No. 06E Std 250 250 250 265 265 275 275 299 299 299
(Qty Cylinder) Compressor* Opt (4) A1 (4) A2 (6) A1 (4) A2 (6) A1 (6) A2 (6) A1 (6) A2 (6) A1 (6) A2
Model No. 06E Opt 250 250 265 250 275 265 299 275 299 299
Oil Charge (Pt) Std 17 17 17 21 21 21 21 19 19 19
Capacity Control Steps† 4
CONDENSER FANS (6 Blade) — 60 Hz
Qty...Dia (in.) 4...30 6...30
Airflow (Cfm) 35,000 52,000 51,000
Speed (Rpm) 1140 1140
Total Power (kW) 6.2 9.3
CONDENSER FANS (6 Blade) — 50 Hz
Qty...Dia (in.) 4...30 6...30
Airflow (Cfm) 35,000 52,000 51,000
Speed (Rpm) 950 950
Total Power (kW) 6.2 9.3
CONDENSER COIL Enhanced Copper Tubes, Aluminum Lanced Fin
Rows...Fins per in. 2...17 2...17 3...17 2...19 3...17
Face Area (sq ft) 80.5 80.5 80.5 116.7 116.7
Storage Capacity (Lb per Circuit) at 120 F 35 35 55 55 80
CONNECTIONS
Suction, ODF (in.)** 2
Liquid, ODF (in.)**
Hot Gas Bypass, ODF (in.)
Cu-Cu 3538 3578 3963 4197 4678
Opt 11111
Opt 17 17 21 17 21 21 19 21 19 19
1
⁄
8
7
⁄
8
5
⁄
8
Table 3B — Units 38AH044-084 Physical Data — 50/60 Hz (SI)
38AH 044 054 064 074 084
OPERATING WEIGHT WITH Cu-Al 1478 1501 1617 1729 1840
REFRIGERANT (Approx) — Kg Cu-Cu 1609 1632 1813 1918 2148
SHIP WEIGHT WITH COIL PROTECTION ONLY
(Approx) — Kg Cu-Al 1474 1492 1601 1715 1814
TYPICAL OPERATING REFRIGERANT R-22
CHARGE (Approx) — Kg 28.1 32.7 39.9 47.2 58.9
Qty of Circuits Std 22222
COMPRESSOR Type...R/s Reciprocating Semi-Hermetic...29.2 @ 60 Hz; 24.3 @ 50 Hz
(Qty Cylinder) Compressor* Std (4) A1 (4) B1 (4) A1 (6) B1 (6) A1 (6) B1 (6) A1 (6) B1 (6) A1 (6) B1
Model No. 06E Std 250 250 250 265 265 275 275 299 299 299
(Qty) Cylinder) Compressor* Opt (4) A1 (4) A2 (6) A1 (4) A2 (6) A1 (6) A2 (6) A1 (6) A2 (6) A1 (6) A2
Model No. 06E Opt 250 250 265 250 275 265 299 275 299 299
Oil Charge (L) Std 8.0 8.0 8.0 9.9 9.9 9.9 9.9 9.0 9.0 9.0
Capacity Control Steps† 4
CONDENSER FANS (6 Blade) — 50 Hz
Qty...Dia (mm) 4...762 6...762
Airflow (L/s) 16,500 24,500 24,100
Speed (R/s) 15.8 15.8
Total Power (kW) 6.2 9.3
CONDENSER FANS (6 Blade) — 60 Hz
Qty...Dia (mm) 4...762 6...762
Airflow (L/s) 16,500 24,500 24,100
Speed (R/s) 19.0 19.0
Total Power (kW) 6.2 9.3
CONDENSER COIL Enhanced Copper Tubes, Aluminum Lanced Fin
Rows...Fins per m 2...669 2...669 3...669 2...782 3...669
Face Area (sq m) 7.48 7.48 7.48 10.84 10.84
Storage Capacity (Kg per Circuit) at 48.9 C 16 16 25 25 36
CONNECTIONS
Suction, ODF (in.)** 2
Liquid, ODF (in.)**
Hot Gas Bypass, ODF (in.)
LEGEND
Cu-Al — Copper tubes with aluminum fins
Cu-Cu — Copper tubes with copper fins
ODF — Outside Diameter, Female
Opt — Optional Single-Circuit Units
Std — Standard Dual-Circuit Units
*Compressor A1 is lead on standard and optional single-circuit units.
†Capacity control steps listed are for constant-volume units with no accesso-
ries. Refer to Table 19A or 19B, page 48, for additional system capacity
information.
Cu-Cu 1605 1623 1798 1904 2122
Opt 11111
Opt 8.0 8.0 9.9 8.0 9.9 9.9 9.0 9.9 9.0 9.0
1
⁄
8
7
⁄
8
5
⁄
8
**For single-circuit units, suction ODF is 2
11⁄8in. (28.6 mm). Single circuits have a factory-installed manifold; no
field modification is required.
NOTES:
1. Certified dimensional drawings available on request.
2. Equivalent connection values in mm are as follows:
5
⁄8in. (66.7 mm) and liquid ODF is
in. mm
5
⁄
8
15.9
7
⁄
8
22.2
1
⁄
8
54.0
2
10
Table 4A — Units 38AH094-134 Physical Data — 50/60 Hz (English)
38AH 094 104
OPERATING WEIGHT WITH Cu-Al 5088 5435 3630* 3630* 3630* 3877*
REFRIGERANT (Approx) — Lb Cu-Cu 5813 6160 4063* 4063* 4063* 4294*
SHIP WEIGHT WITH Cu-Al 5630 5990 3907* 3907* 3907* 4080*
COIL PROTECTION AND SKID Cu-Cu 6355 6715 4340* 4340* 4340* 4497*
(Approx) — Lb
TYPICAL OPERATING
REFRIGERANT CHARGE
(Approx) — Lb 148 135 88 88 88 104
Qty of Circuits 2 2 1111
COMPRESSOR Type...Rpm Reciprocating Semi-Hermetic...1750 @ 60 Hz; 1460 @ 50 Hz
(Qty Cylinder) Compressor† (6)A1 (4)A2 (6)B1 (6)A1 (4)A2 (6)B1 (6)B2 (6)A1 (6)A2 (6)A1 (6)A2 (6)A1 (6)A2 (6)A1 (6)A2
Model No. 06E −275 −250 −299 −265 −250 −265 −265 −275 −265 −275 −265 −275 −265 −299 −275
Oil Charge (Pt) 21 17 19 21 17 21 21 21 21 21 21 21 21 19 21
Capacity Control Steps** 5 6 3333
CONDENSER FANS (6 Blade) — 60 Hz
Qty...Dia (in.) 6...30 6...30 4...30 4...30 4...30 6...30
Airflow (Cfm) 52,000 52,000 35,000 35,000 35,000 52,000
Speed (Rpm) 1140 1140 1140 1140 1140 1140
Total Power (kW) 9.4 9.5 6.4 6.4 6.4 9.2
CONDENSER FANS (6 Blade) — 50 Hz
Qty...Dia (in.) 6...30 6...30 4...30 4...30 4...30 6...30
Airflow (Cfm) 52,000 52,000 35,000 35,000 35,000 52,000
Speed (Rpm) 950 950 950 950 950 950
Total Power (kW) 9.4 9.5 6.4 6.4 6.4 9.2
CONDENSER COIL Enhanced Copper Tubes, Aluminum Lanced Fin
Rows...Fins per in. 3...17 3...17 3...17 3...17 3...17 2...19
Face Area (sq ft) 128.3 128.3 80.5 80.5 80.5 116.7
Storage Capacity
(Lb per circuit) at 120 F
CONNECTIONS
Suction, ODF (in.) 2
Liquid, ODF (in.)
Hot Gas Bypass, ODF (in.)
178 178 110 110 110 110
1
⁄
8
7
⁄
8
5
⁄
8
21⁄
8
7
⁄
8
5
⁄
8
R-22
124 134
124A 124B 134A 134B
25⁄
8
11⁄
8
5
⁄
8
25⁄
8
11⁄
8
5
⁄
8
25⁄
8
11⁄
8
5
⁄
8
25⁄
11⁄
5
⁄
8
8
8
Table 4B — Units 38AH094-134 Physical Data — 50/60 Hz (SI)
38AH 094 104
OPERATING WEIGHT WITH Cu-Al 2308 2465 1647* 1647* 1647* 1759*
REFRIGERANT (Approx) — Kg Cu-Cu 2637 2794 1843* 1843* 1843* 1948*
SHIP WEIGHT WITH Cu-Al 2554 2717 1860* 1860* 1860* 1851*
COIL PROTECTION AND SKID Cu-Cu 2883 3046 1968* 1968* 1968* 1968*
(Approx) — Kg
TYPICAL OPERATING
REFRIGERANT CHARGE
(Approx) — Kg 67.1 61.2 39.9 39.9 39.9 47.2
Qty of Circuits 2 2 1111
COMPRESSOR Type...R/s Reciprocating Semi-Hermetic...29.2 @ 60 Hz; 24.3 @ 50 Hz
(Qty Cyliner) Compressor† (6)A1 (4)A2 (6)B1 (6)A1 (4)A2 (6)B1 (6)B2 (6)A1 (6)A2 (6)A1 (6)A2 (6)A1 (6)A2 (6)A1 (6)A2
Model No. 06E −275 −250 −299 −265 −250 −265 −265 −275 −265 −275 −265 −275 −265 −299 −275
Oil Charge (L) 10 8 9 10 8 1010101010101010 9 10
Capacity Control Steps** 5 6 3333
CONDENSER FANS (6 Blade) — 60 Hz
Qty...Dia (mm) 6...762 6...762 4...762 4...762 4...762 6...762
Airflow (L/s) 24,544 24,544 16,520 16,520 16,520 24,544
Speed (R/s) 19 19 19 19 19 19
Total Power (kW) 9.4 9.5 6.4 6.4 6.4 9.2
CONDENSER FANS (6 Blade) — 50 Hz
Qty...Dia (mm) 6...762 6...762 4...762 4...762 4...762 6...762
Airflow (L/s) 24,544 24,544 16,520 16,520 16,520 24,544
Speed (R/s) 15.8 15.8 15.8 15.8 15.8 15.8
Total Power (kW) 9.4 9.5 6.4 6.4 6.4 9.2
CONDENSER COIL Enhanced Copper Tubes, Aluminum Lanced Fin
Rows...Fins per m 3...669.3 3...669.3 3...669.3 3...669.3 3...669.3 2...781.6
Face Area (sq m) 11.9 11.9 7.5 7.5 7.5 10.8
Storage Capacity
(Kg per circuit) at 49 C
CONNECTIONS
Suction, ODF (in.) 2
Liquid, ODF (in.)
Hot Gas Bypass, ODF (in.)
LEGEND
Cu-Al — Copper Tubes with Aluminum Fins
Cu-Cu — Copper Tubes with Copper Fins
ODF — Outside Diameter, Female
*Includes piping and trim kit.
†Compressors are shipped with minimum oil charge.
**Capacity control steps listed are for constant volume units with no accesso-
ries. Refer to Table 20, page 48, for additional system capacity information.
81 81 50 50 50 50
1
⁄
8
7
⁄
8
5
⁄
8
21⁄
8
7
⁄
8
5
⁄
8
NOTES:
1. Unit 38AH124 consists of one 124A module and one 124B module. Unit
38AH134 consists of one 134A module and one 134B module.
2. Certified dimensional drawings available on request.
3. Equivalent connection values in mm are as follows:
R-22
in. mm
5
⁄
8
7
⁄
8
11⁄
8
1
⁄
8
2
25⁄
8
124 134
124A 124B 134A 134B
25⁄
11⁄
5
15.9
22.2
28.6
54.0
66.7
8
8
⁄
8
25⁄
8
11⁄
8
5
⁄
8
25⁄
8
11⁄
8
5
⁄
8
25⁄
11⁄
5
⁄
8
8
8
11
CONTROL
BOX
Fig. 7 — Modules 38AH124A or 134A — Shipping Locations of Piping
and Sheet Metal Trim Kit
SHEET METAL COVER
PANEL (REMOVED)
RIG
HERE
RIG
HERE
RIG
HERE
RIG
HERE
Fig. 8 — Correct Placement of Modules Without Piping
and Sheet Metal Trim (Unit 38AH134 Shown)
12
24-in. (610-mm)
SERVICE SPACE
FACTORYINSTALLED
SUCTION
LINE LOOP
Fig. 9B — Field-Installed Suction Line Loop
Fig. 9A — Typical Module with Cover
Panels Removed
SHIPMENT BOLTS
38AH044-084,124,134
MOUNTING SPRINGS
38AH094,104
SHIPMENT BOLTS
MOUNTING
BOLTS
RAIL BOLT (3) (2 SHOWN)
MOUNTING
BOLTS RAIL BOLT (3) (2 SHOWN)
Fig. 10 — Outer View, Compressor Mounting
13
Step 3 — Make Refrigerant Piping
Connections
The field-supplied liquid line solenoid valve must be
installed at the evaporator to avoid possible compressor
damage during unit operation. See Fig. 11 (for 38AH044084 dual-circuit and 38AH094-134 units), or Fig. 12 (for
38AH044-084 optional single-circuit units).
The units have largesuctionlinestominimizefriction losses.
The units also have the ability to operate at low capacity.
Because of these capabilities, use special care with suction
piping and suction risers to ensure proper compressor oil
return under all operating conditions. Maximum allowable
vertical separation between the condensing unit and the evaporator is shown in Table 5. Size suction lines in accordance
with Tables 6A or 6B through 9A or 9B and Fig. 13. Mount
liquid line solenoid valve just ahead of the TXVs (thermostatic expansion valves) which will be mounted at the
evaporator. See Fig. 11 (for 38AH044-084 dual-circuit and
38AH094-134 units) or Fig. 12 (for 38AH044-084 optional
single-circuit units).
T oachievegood mixing of the refrigerant leaving the evaporator 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. 14 (for 38AH044-084
dual-circuit and 38AH094-134 units) or Fig. 15 (for
38AH044-084 optional single-circuit units).
2. Locate the TXV bulb on a vertical riser, where possible.
If a horizontal location is necessary, secure the bulb at
approximately the 4 o’clock position.
3. Size the suction line from the evaporator to the common
suction line to achieve high refrigerant velocity. See
Tables 6A or 6B through 9A or 9B and Fig. 13.
If an oil return connection at the bottom of the suction
header is supplied with an evaporator, tee-in this connection
ahead of first mixing elbow. See Fig. 14 (for 38AH044-084
dual-circuit and 38AH094-134 units) or Fig. 15(for38AH044084 optional 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.
Install a field-supplied filter drier and sight glasses in each
refrigerant system. Select the filter drier for maximum unit
capacity and minimum pressuredrop.Figure1 1(for 38AH044084 dual-circuit and 38AH094-134 units) or Fig. 12 (for
38AH044-084 optional 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 suction lines at the condenser.
Table 5 — Liquid Lift
UNIT
38AH
044 69 21.0 57.5 17.5
054 75 23.0 75.0 23.0
064 75 23.0 65.0 19.8
074 45 13.7 37.5 11.4
084 75 23.0 75.0 23.0
094 55 16.7 46.0 14.0
104 50 15.2 42.0 12.8
124 75 23.0 65.0 19.8
134 45 13.7 37.5 11.4
FtMFtM
MAXIMUM LIQUID LIFT
60 Hz 50 Hz
UNITS 38AH044-084 — Relieve the pressurecaused by the
holding charge into a refrigerant recovery system. Uncap
the suction line and cut the run-around tube at the liquid line
as close to the loop elbow as possible. This will leave
approximately 2 in. (50 mm) of straight tube for liquid line
connection.
IMPORTANT: Protect the liquid valves from the heat
of brazing.
Leak test the entire system by using soap bubbles and
nitrogen or R-22 with an electronic leak detector.
Purge nitrogen or reclaim R-22 from system after completion of leak-checking procedure. Repair leak if one is
found. When finished, evacuate and dehydrate system using
the methods described in CarrierGTAC II (General Training
Air Conditioning II), Module 4, System Dehydration.
UNITS 38AH094-134 — Relieve the R-22 holding charge
of each circuit into a refrigerant recovery system. Remove
the liquid line to factory-installed suction line loop by cutting the loop at the liquid valve. (See Fig. 9A and 9B.) Cut
as close to the 90-degree bend in the loop as possible. The
remaining tube piece in the valve will be used for brazing
the liquid line. Unbraze and remove the cap from the liquid
line. For 38AH094 and 104 units, sweat-connect the liquid
and suction lines from the evaporator. For 38AH124 and 134
units, see Piping Kit Connections on page 21.
LEGEND
LLS — Liquid Line Solenoid
TXV — Thermostatic Expansion Valve
*Field-Supplied.
Fig. 11 — Required Location of Solenoid Valves and Recommended Filter Drier and
Sight Glass Locations for 38AH044-084 Dual-Circuit and 38AH094-134 Units
14
*Field-Supplied.
Fig. 12 — Required Location of Solenoid Valves and Recommended Filter Drier and
Sight Glass Locations for 38AH044-084 Optional Single-Circuit Units
LEGEND
A—Pipe A, Suction Riser, without Trap
B—Pipe B, Suction Riser with Trap
C—Suction Line to Condensing Unit
D—Pipe D, Suction Riser Short Lift
RED. — Reducer
STR — Street
NOTES:
1. Short riser, pipe D, is used when routing suction line to condensing unit connection. See table at right.
2. See Tables 6A-9B for values of A, B, and C.
Fig. 13 — Double Suction Riser Construction
PIPE D DIAMETER
UNIT
38AH
Dual Circuit*
AB
Single Circuit*
in. mm in. mm in. mm
5
044 1
054 15⁄841 15⁄
064 1
074 21⁄854 21⁄
084 21⁄854 21⁄
094, 104 2
124, 134 25⁄867 25⁄
*Maximum length of riser is 3 ft (914 mm).
†Double suction riser required if accessory unloader is field
installed.
⁄841 15⁄
5
⁄841 21⁄
1
⁄854 21⁄
8
41 21⁄
8
41 21⁄
8
54 21⁄
8
54 21⁄
8
54 25⁄8† 67†
8
54 — —
8
67 — —
8
8
8
8
15
54
54
54
54
Table 6A — Refrigerant Piping Requirements — 38AH044-104 Dual-Circuit Units — 60 Hz
TOTAL LINEAR LENGTH OF INTERCONNECTING PIPE — FT (M)
UNIT
38AH
044
054
064
074
084
094
104
Ckt A
Ckt B
Ckt A
Ckt B
Ckt A
Ckt B
Ckt A
Ckt B
Ckt A
Ckt B
Ckt A
Ckt B
Ckt A
Ckt B
LEGEND
L—Liquid Line
S—Suction Line
*Double suction riser required on units with field installed unloader
on circuit B compressor if condensing unit is elevated above
evaporator.
†Double suction riser required on units with field installed unloader
on circuit B compressor if condensing unit is elevated above
evaporator.
**Double suction riser required on all unit configurations if condens-
ing unit is elevated above evaporator.
NOTES:
1. Addition of 2 unloaders to circuit B compressor is not
recommended.
2. 38AH094 and 38AH104 piping sizes apply only to factory supplied unit configurations. They do NOT take into account any field
installed unloaders.
3. Piping sizes are based on unit operation above 40F(4.4C)saturated suction temperature (SST). When operating below 40 F
(4.4 C),referto Carrier System Design Manual,E20-IIT pipingdesign program, or ASHRAE Handbook to select proper line sizes.
4. Pipe sizes are based on the total linear length shown for each
column, plus a 50% allowance for fittings.
15-25
(4.6-7.6)
25-50
(7.6-15.2)
(15.2-22.9)
LSLSL S L S L S L S
5
⁄
8
5
5
7
7
7
7
7
7
7
7
7
7
7
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⁄
7
8
8
8
8
8
8
8
8
8
8
8
8
8
8
11⁄
11⁄
11⁄
11⁄
11⁄
11⁄
⁄
8
7
7
7
7
7
7
7
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⁄
7
8
8
8
8
8
8
8
8
8
8
8
8
8
8
11⁄
11⁄
11⁄
11⁄
11⁄
11⁄
11⁄
⁄
8
7
⁄
8
7
⁄
8
7
⁄
8
7
⁄
8
7
⁄
8
7
⁄
8
8
8
8
8
8
8
8
50-75
21⁄
8
21⁄
8
21⁄
8
21⁄
8
21⁄
8
21⁄
8
21⁄
8
21⁄
8
21⁄
8
21⁄
8
25⁄8†11⁄825⁄8†13⁄825⁄8†13⁄831⁄8**
21⁄
8
25⁄8†11⁄825⁄8†13⁄825⁄8†13⁄831⁄8**
25⁄
8
5. Suction and liquid linesizingis based onpressuredrop equivalent
6. Double suction risers may be required if condensing unit is
7. Refer to Carrier System Design Manual or to E20-II design
8. All pipe sizes are OD inches. Equivalent sizes in millimeters
75-100
(22.9-30.5)
7
⁄
8
7
⁄
8
7
⁄
8
11⁄
7
⁄
8
11⁄
11⁄
11⁄
11⁄
11⁄
11⁄
11⁄
to 2 F (1.1 C) at nominal rating conditions. Higher pressure drop
design criteria may allow selection of smaller pipe sizes, but at a
penalty of decreased system capacity and efficiency.
elevated above the evaporator.Seefootnotes and double suction
riser table below.
programs for further information on selecting pipe sizes for split
systems.
21⁄
8
21⁄
8
21⁄
8
8
8
8
8
8
8
8
8
21⁄
8
21⁄
8
21⁄
8
21⁄
8
25⁄
8
25⁄8†13⁄825⁄8†13⁄825⁄8†
25⁄
8
25⁄
8
25⁄
8
100-150
(30.5-45.7)
7
⁄
8
7
⁄
8
7
⁄
8
11⁄
8
11⁄
8
11⁄
8
11⁄
8
13⁄
8
13⁄
8
11⁄
8
13⁄
8
11⁄
11⁄
11⁄
13⁄
13⁄
13⁄
7
⁄
8
7
⁄
8
7
⁄
8
21⁄
8
21⁄
8
21⁄
8
21⁄
8
21⁄
8
25⁄
8
25⁄8†11⁄825⁄8†
25⁄
8
25⁄
8
25⁄
8
31⁄8** 13⁄
follow:
in. mm
5
⁄
11⁄
1
15⁄
2
25⁄
31⁄
8
7
⁄
8
8
3
⁄
8
8
1
⁄
8
8
8
15.9
22.2
28.6
34.9
41.3
54.0
66.7
79.4
150-200
(45.7-61.0)
21⁄
21⁄
21⁄
8
25⁄8*
8
25⁄8†
8
25⁄
8
25⁄
8
25⁄
8
25⁄
8
31⁄8**
8
8
8
8
8
8
8
Table 6B — Refrigerant Piping Requirements for Double Suction Risers,
38AH054-104 Dual-Circuit Units — 60 Hz
TOTAL LINEAR LENGTH OF INTERCONNECTING PIPE — FT (M)
UNIT
38AH
054
064
074
084
094
104
Ckt A ————————————
Ckt B —————————1
Ckt A —————————1
Ckt B ————————————
Ckt A ——————1
Ckt B ————————————
Ckt A ———1
Ckt B ————————————
Ckt A 1
Ckt B ————————————
Ckt A 1
Ckt B ——————1
LEGEND
——Not Required
Pipe A — Suction Riser Without Trap
Pipe B — Suction Riser With Trap
Pipe C — Suction Line to Condensing Unit
NOTES:
1. See Refrigerant Piping Requirements table at top of page to
determine need for double suction risers.
2. Pipe sizes are based on the total linear length, shown for each
column, plus a 50% allowance for fittings.
50-75
(15.2-22.9)
75-100
(22.9-30.5)
ABCABCABCABC
5
⁄82
5
⁄
8
21⁄
8
25⁄
8
15⁄
8
3
⁄
8
21⁄
8
25⁄
8
13⁄
8
1
⁄82
21⁄
8
21⁄
8
5
⁄81
25⁄
8
25⁄
8
3. Suction and liquid linesizingis based onpressuredrop equivalent
4. Refer to Carrier System Design Manual or to E20-II design
5. All pipe sizes are OD inches. See Table 6A notes for metric
6. Refer to Fig. 13 for double suction riser construction.
100-150
(30.5-45.7)
5
⁄82
5
⁄82
15⁄
8
13⁄
8
3
⁄82
to 2F(1.1 C) at nominalratingconditions. Higher design pressure
drop criteriamay allow selection ofsmallerpipe sizes butata penalty of decreased system capacity and efficiency.
programs for further information on selecting pipe sizes for split
systems.
1
⁄82
1
⁄82
21⁄
8
21⁄
8
5
⁄83
5
⁄81
5
⁄81
25⁄
8
25⁄
8
1
⁄81
150-200
(45.7-61.0)
5
⁄82
5
⁄82
5
⁄82
5
⁄82
15⁄
8
15⁄
8
5
⁄82
1
⁄82
1
⁄82
1
⁄82
1
⁄82
25⁄
8
25⁄
8
5
⁄83
5
⁄
8
5
⁄
8
5
⁄
8
5
⁄
8
31⁄
8
31⁄
8
1
⁄
8
equivalents.
16
Table 7A — Refrigerant Piping Requirements, 38AH044-104 Dual-Circuit Units — 50 Hz
TOTAL LINEAR LENGTH OF INTERCONNECTING PIPE — FT (M)
UNIT
38AH
044
054
064
074
084
094
104
Ckt A
Ckt B
Ckt A
Ckt B
Ckt A
Ckt B
Ckt A
Ckt B
Ckt A
Ckt B
Ckt A
Ckt B
Ckt A
Ckt B
LEGEND
L—Liquid Line
S—Suction Line
*Double suction riser required on units with field installed unloader
on circuit B compressor if condensing unit is elevated above
evaporator.
†Double suction riser required on units with field installed unloader
on circuit B compressor if condensing unit is elevated above
evaporator.
**Double suction riser required on all unit configurations if condens-
ing unit is elevated above evaporator.
NOTES:
1. Addition of 2 unloaders to circuit B compressor is not
recommended.
2. 38AH094 and 38AH104 piping sizes apply only to factory supplied unit configurations. They do NOT take into account any field
installed unloaders.
3. Piping sizes are based on unit operation above 40F(4.4C)saturated suction temperature (SST). When operating below 40 F
(4.4 C),referto Carrier System Design Manual,E20-IIT pipingdesign program, or ASHRAE Handbook to select proper line sizes.
4. Pipe sizes are based on the total linear length shown for each
column, plus a 50% allowance for fittings.
15-25
(4.6-7.6)
25-50
(7.6-15.2)
(15.2-22.9)
LSLSLSLSLSLS
5
⁄
8
13⁄
5
⁄
8
13⁄
5
⁄
8
13⁄
7
⁄
8
15⁄
7
⁄
8
15⁄
7
⁄
8
15⁄
7
⁄
8
15⁄
7
⁄
8
21⁄
7
⁄
8
21⁄
7
⁄
8
21⁄
7
⁄
8
21⁄
7
⁄
8
21⁄
7
⁄
8
21⁄
7
⁄
8
21⁄
7
8
8
8
8
8
8
8
8
8
8
8
8
8
8
11⁄
11⁄
⁄
8
7
7
7
7
7
7
7
7
7
7
7
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⁄
7
8
⁄
8
7
8
⁄
8
7
8
⁄
8
7
8
⁄
8
7
8
⁄
8
7
8
⁄
8
7
8
⁄
11⁄
11⁄
11⁄
11⁄
11⁄
11⁄
11⁄
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
50-75
75-100
(22.9-30.5)
15⁄
8
15⁄
8
15⁄
8
21⁄
8
21⁄8†
21⁄
8
21⁄
8
21⁄
8
21⁄
8
21⁄
8
25⁄8** 11⁄
21⁄
8
21⁄
8
25⁄
8
7
⁄
8
7
⁄
8
7
⁄
8
7
⁄
8
7
⁄
8
7
⁄
8
7
⁄
8
11⁄
11⁄
11⁄
11⁄
11⁄
11⁄
5. Suction and liquid linesizingis based onpressuredrop equivalent
to 2 F (1.1 C) at nominal rating conditions. Higher pressure drop
design criteria may allow selection of smaller pipe sizes, but at a
penalty of decreased system capacity and efficiency.
6. Double suction risers may be required if condensing unit is
elevated above the evaporator.Seefootnotes and double suction
riser table below.
7. Refer to Carrier System Design Manual or to E20-II design
programs for further information on selecting pipe sizes for split
systems.
8. All pipe sizes are OD inches. Equivalent sizes in millimeters
follow:
21⁄
8
21⁄
8
21⁄
8
21⁄
8
21⁄8†11⁄821⁄8†11⁄825⁄8**
21⁄
8
21⁄
8
8
8
8
8
8
8
8
25⁄
8
25⁄8†11⁄825⁄8†11⁄825⁄8†
25⁄
8
25⁄8** 11⁄
25⁄8*† 11⁄
25⁄8** 11⁄
25⁄
8
100-150
(30.5-45.7)
7
⁄
8
7
⁄
8
7
⁄
8
11⁄
8
11⁄
8
11⁄
8
11⁄
8
11⁄
8
8
8
8
13⁄
8
150-200
(45.7-61.0)
11⁄
7
⁄
8
7
⁄
8
7
⁄
8
8
21⁄
21⁄
21⁄
21⁄
8
8
8
8
25⁄8*11⁄82
25⁄8†11⁄825⁄8†
25⁄
8
25⁄
8
25⁄8** 13⁄
25⁄8*† 11⁄
25⁄8** 13⁄
25⁄
8
11⁄
11⁄
13⁄
8
8
8
8
8
8
in. mm
5
⁄
11⁄
1
15⁄
2
25⁄
31⁄
8
7
⁄
8
8
3
⁄
8
8
1
⁄
8
8
8
15.9
22.2
28.6
34.9
41.3
54.0
66.7
79.4
21⁄
8
21⁄
8
21⁄
8
25⁄8*†
5
⁄
8
25⁄
8
25⁄
8
31⁄8**
25⁄8*†
31⁄8**
31⁄8**
*
Table 7B— Refrigerant Piping Requirements for Double Suction Risers,
38AH054-104 Dual-Circuit Units — 50 Hz
TOTAL LINEAR LENGTH OF INTERCONNECTING PIPE — FT (M)
UNIT
38AH
054
064
074
084
094
104
Ckt A ————————————
Ckt B —————————1
Ckt A 13⁄
Ckt B ——————1
Ckt A ——————1
Ckt B ————————————
Ckt A ———1
Ckt B ————————————
Ckt A 1
Ckt B ———1
Ckt A ———1
Ckt B —————————1
LEGEND
——Not Required
Pipe A — Suction Riser Without Trap
Pipe B — Suction Riser With Trap
Pipe C — Suction Line to Condensing Unit
NOTES:
1. See Refrigerant Piping Requirements table at top of page to
determine need for double suction risers.
2. Pipe sizes are based on the total linear length, shown for each
column, plus a 50% allowance for fittings.
50-75
(15.2-22.9)
75-100
(22.9-30.5)
ABCABCABCABC
8
15⁄
8
21⁄
8
13⁄
8
5
⁄82
3
⁄
8
21⁄
8
25⁄
8
13⁄
8
3
⁄82
3
⁄82
15⁄
8
21⁄
8
1
⁄82
21⁄
8
1
⁄82
1
⁄82
5
⁄81
25⁄
8
5
⁄81
5
⁄81
3. Suction and liquid linesizingis based onpressuredrop equivalent
4. Refer to Carrier System Design Manual or to E20-II design
5. All pipe sizes are OD inches. See Table 7A notes for metric
6. Refer to Fig. 13 for double suction riser construction.
100-150
(30.5-45.7)
15⁄
8
15⁄
8
21⁄
5
⁄82
5
⁄82
5
⁄82
15⁄
8
5
⁄82
5
⁄82
to 2F(1.1 C) at nominalratingconditions. Higher design pressure
drop criteriamay allow selection ofsmallerpipe sizes butata penalty of decreased system capacity and efficiency.
programs for further information on selecting pipe sizes for split
systems.
1
⁄82
1
⁄82
1
⁄82
21⁄
8
1
⁄82
1
⁄82
8
5
⁄81
5
⁄81
5
⁄81
25⁄
8
5
⁄81
5
⁄81
150-200
(45.7-61.0)
5
⁄82
15⁄
8
5
⁄82
5
⁄82
5
⁄82
15⁄
8
5
⁄82
5
⁄82
5
⁄82
1
⁄82
21⁄
8
1
⁄82
1
⁄82
1
⁄82
25⁄
8
1
⁄82
5
⁄83
5
⁄83
5
⁄
8
25⁄
8
5
⁄
8
5
⁄
8
5
⁄
8
31⁄
8
5
⁄
8
1
⁄
8
1
⁄
8
equivalents.
17
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