Carrier 38AH044-134 User Manual

38AH044-134 Air-Cooled Condensing Units 50/60 Hz

É,

COMMERCIAL UNITARY SYSTEMS

Installation, Start-Up and

Service Instructions

CONTENTS
	Page
SAFETY CONSIDERATIONS.....................	... 1
INSTALLATION.........................................	. 1-37
Step 1 — Rig and Place Unit....................	... 1
• DOMESTIC UNITS
• EXPORT UNITS
• PLACING UNITS
Step 2 — Check Compressor Mounting
• UNITS 38AH044-084
• UNITS 38AH094-I34
Step 3 — Make Refrigerant Piping
Connections .............................................	13
• UNITS 38AH044-084
• UNITS 38AH094-134
Step 4 — Make Electricai Connections	23
• POWER SUPPLY
• FIELD POWER CONNECTIONS
• MAIN POWER
• CONTROL CIRCUIT WIRING
Step 5 — Instali Accessories .................	37
• LOW-AMBIENT OPERATION
• MISCELLANEOUS ACCESSORIES
PRE-START-UP .......................................	............37
START-UP ................................................	........ 37-43
SERViCE....................................................	........44-47
CONTROL .................................................	........47-50
TROUBLESHOOTING ........................................	51,52
START-UP CHECKLIST ...................	CL-L CL-2

SAFETY CONSIDERATIONS

Installing, starting up, and servicing this equipment can be hazardous due to system pressures, electrical compo­ nents, 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 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.

•Follow all safety codes.

•Wear safety glasses and work gloves.

•Use care in handling, rigging, and setting bulky equipment.

S tillELECTRIC SHOCK HAZARD.
eg	Open all remote disconnects before servicing
	this equipment.

INSTALLATION

Step 1 — Rig and Place Unit — All units are de­ signed 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 suf­ ficient 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 protec­ tion 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 coil protection 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. While on 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 — Refer to Fig. 1 and 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.

A CAUTION

Do not forklift these units unless the unit is attached to a skid designed for forklifting.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obiigations.

Book 11

PC 111

Catalog No 533-812

Printed in U.S A.

Form 38AH-14SI

Pg 1

5-96

Replaces: 38AH-13SI

Tab 3a

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 perim­ eter support channel between the unit and the isolators is recommended. Fasteners for mounting unit are field sup­ plied. 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 suc­ tion lines to indoor unit. For multiple units, allow 8 ft (2440 mm) separation between units for airflow and service.

A CAUTION

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 the proper place­ ment of the unit.

Units 38AH094.104 — For mounting units on vibration iso­ lators, a perimeter support channel is required between the unit and the support isolators. The perimeter support chan­ nel must be sized to support the fully assembled unit. Do not

support units on individual isolation supports. Support chaiinel, hardware, and fasteners are field supplied. When unit is in proper location, level unit and bolt into position 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 (134A and 134B). The modules must be connected at the final installation site

with the factory-shipped piping and sheet metal trim kit mounted on Module 124A or 134A. See Fig. 7.

A WARNING

Do not move assembled 38AH124 or 134 units as a single assembly. Always move modules individually during in­ stallation or at any other time.

Mark installation site for placement of Modules 124 A 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 124A or 134A in position, ensuring that the control box is at the end opposite the service space. See Fig. 8.

Remove sheet metal and tubing from Module 124A or 134A sheet metal trim kit (Fig, 7). Remove sheet metal cover pan­ els 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	044	054		064	074	084	094	104	MODULE			MODULE	MODULE	MODULE
38AH									124A			124B	134A	134B
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								COMPR		COMPR
— — Not Applicable		Y
C — Copper Fin Coils		A	CONTROL
			BOX
			END
											CONTROL
											BOX
				COMPR	COMPR						END

r—"T I

TOP VIEW, TYPICAL

124, 134 ONLY

Remove sheet metal cover panels from return-bend end of Module 124B or 134B. Place Module 124B or 134B in po­ sition. The exposed retnrn-bend ends of each module are now opposite each other and facing the service space. The com­ pressors of each modnle are on opposite sides of the unit.

IMPORTANT; Modules must be placed 24 in. (610 mm) apart and sqnare relative to each other.

The modules are now in position for piping installation and final assembly. See Fig. 8. For mounting units on vi­ bration isolators, a perimeter support channel is required be­ tween the assembled unit and the support isolators. The pe­ rimeter support channel must be sized to support the fully assembled unit. Do not support modules on individual iso­ lation supports. Support channel, hardware, and fasteners are field supplied.

Table 2A — Operational Corner Weights with Refrigerant Charge (Approximate) — Lb

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 mounted on pans and are held down by 4 bolts dnring 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 and 104 compres­ sors are mounted on rails and held down by rail bolts during shipment. After unit is installed, loosen the rail bolts to al­ low 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 until snubber washer can be moved with finger pressure. See Fig. 10.

Table 2B — Operational Corner Weights with

Refrigerant Charge (Approximate) — Kg

UNIT	TOTAL	OPERATIONAL CORNER WEIGHT				UNIT	TOTAL	OPERATIONAL CORNER WEIGHT
38AH	WEIGHT	A	В	C	D	38AH	WEIGHT	A	В	C	D
044	3259	939	893	695	732	044	1478	426	405	316	332
044C	3547	1013	967	765	802	044C	1609	460	438	347	364
054	3309	964	905	697	742	054	1501	437	411	316	337
054C	3597	1034	978	771	814	054C	1632	469	444	350	369
064	3565	1018	1011	765	771	064	1617	462	459	347	350
064C	3998	1125	1117	874	879	064C	1813	510	508	397	399
074	3812	1146	986	777	903	074	1729	520	447	352	410
074C	4229	1272	1059	862	1035	074C	1918	577	481	391	470
084	4057	1220	1049	827	961	084	1840	553	476	375	436
084C	4735	1425	1186	965	1159	084C	2148	646	538	438	526
094	5088	1114	2192	1182	601	094	2308	505	994	536	272
094C	5813	1273	2504	1350	686	094C	2637	577	1136	612	311
104	5435	1240	2138	1302	755	104	2465	562	970	591	342
104C	6160	1405	2423	1476	856	104C	2794	637	1099	670	388
MODULE						MODULE
38AH						38AH
124A	3630	1037	1030	779	785	124A	1647	470	467	353	356
124A-C	4063	1144	1137	889	894	124A-C	1843	519	516	403	405
124B	3630	1037	1030	779	785	124B	1647	470	467	353	356
124B-C	4063	1144	1137	889	894	124B-C	1843	519	516	403	405
134A	3630	1037	1030	779	785	134A	1647	470	467	353	356
134A-C	4063	1144	1137	889	894	134A-C	1843	519	516	403	405
134B	3877	1167	997	789	924	134B	1759	529	452	358	419
134B-C	4294	1293	1080	874	1047	134B-C	1948	587	490	396	475

LEGEND

C — Copper Fin Coils

NOTE: Total weight may differ from summation of corner weights due to rounding of numerals

LEGEND

C — Copper Fin Coils

NOTE. Total weight may differ from summation of corner weights due to rounding of numerals

Г'

CONTROL

BOX

END

COMPR COMPR

Г'

TOP VIEW, TYPICAL

		DUAL CKT	SINGLE CKT
	SUCTION	2Ve" Dia [54 mm]	25/e" Dia [67 mm]
	CONNECTiON(S)
	LIQUID	Va" Dia [22 mm]	IVa" Dia [29 mm]
	CONNECTION(S)
	SUCTION C	2'-iVi6" [627mm]	r-10^/w" [567mm]
	LIQUID D	1'-10Vi6" [561mm]	1'-10yi6" [567mm]
	SUCTION {Ckt A)	V-713/16'' [503mm]	2'-%" [626mm]
	SUCTION (Ckt B)	2'-%" [626mm]	—	RELIEF VALVES LOCATED ON
	LIQUID (Ckt A)	2'-5%" [756mm]	2'-10%" [879mm]	THE C0HPRE55OR5 ARE EQUIPPED
				WITH A 3/8" 5AE FLARE FOR
	LIQUID (Ckt B)	2'-10%" [879mm]	—
				FIELD CONNECTION

SCALE 1<6

6 1/8'-

CISSMI]

OO	ooooooOOOOO
O O	O OOOO

TOP VIEW OF CONTROL BOX SHELF

WITH FIELD POWER SUPPLY CONNECTIONS.

Chart 1, Field Power Supply Connections

	UNIT	VOLTAGE	Hz	DIAMETER — in. [mm]	QTY
	044	230	50	3% [92]	1
	044, 054	208/230	60	3% [92]	1
		346, 380/415	50	2V2 [63]	1
	044, 054, 064	460,575,380	60	2Va [63]	1
	064	208/230	60	2Va [63]	2
		346, 380/415	50	3% [92]	1

LEGEND

C — Copper Fin Coils

MTG — Mounting

SAE — Society of Automotive Engineers

NOTES;

1The approximate operating weight of the unit is: 38AH--------------044—---------------------------------3259 lb1478 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

(SEE NOTE 4 ANO CHART I)

FIELD PONER SUPPLY

2Unit must have clearances for airflow as fo lows: Top — Do not restrict in any way

Ends — 5 ft [1524 mm] Sides — 6 ft [1829 mm]

3Mounting holes may be used to mount unit 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

4One 35/s" (92 mm) diameter hole is recommended for single-entry power on size 064 (208/230-v) units

5.See Table 1 for rigging center of gravity (Dimensions X,Y) See Table 2A and 2B for A-D corner weights

6 Circled numerals in Top View refer to condenser fans by position

Fig. 1 — Dimensions — Units 38AH044,054,064

		DUAL CKT	SINGLE CKT	I I
	SUCTION	2Vs'' Dia [54 mm]	2¥8" Dia [67 mm]
	CONNECTION(S)
f	LIQUID	%" Dia [22 mm]	IVs" Dia [29 mm]
	CONNECTION(S)
	SUCTION C	2'-iyi6" [627mm]	1'-10¥i6" [567mm]
	LIQUID D	r-IOVie" [561mm]	1'-10¥i6" [567mm]
	SUCTION (Ckt A)	1'-7i3/i6" [503mm]	2'-¥8" [626mm]	RELIEF VALVES LOCATED ON
	SUCTION (Ckt B)	2'-¥e" [626mm]	—	THE COMPRESSORS ARE EQUIPPED
				WITH A 3/B' SAE FLARE FOR
	LIQUID (Ckt A)	2'-5¥4" [756mm]	2'-10¥B" [879mm]	FIELD CONNECTION
	LIQUID (Ckt B)	2'-10¥e" [879mm]	—	SCALE 1,8

CONTROL BOX

END

06) MTG HOLES

17/32' DIA

nam]

				LEFT-END VIEW
	Chart 1, Field Power Supply Connections
UNIT		VOLTAGE	Hz	DIAMETER — in. [mm]		QTY
074		208/230	60	2V2 [63]		2
		460	60	2Vs [63]		1
		346, 380/415	50	3% [92]		1
074, 084		380	60	3¥s [92]		1
		575	60	2Va [63]		1
084		208/230	60	3¥e [92]		2
		460	60	3¥a [92]		1
LEGEND
C — Copper Fin Coils
MTG — Mounting
SAE — Society of Automotive Engineers
NOTES:
1 The approximate operating weight of the unit is:					(1729kg)
38AH-074—				3812 lb
38AH-074-C				4229 lb(1918kg)	(1840kg)
38AH-084—				4057 lb
38AH-084-C				4735 lb(2148kg)

2Unit must have clearances for airflow as follows: Top — Do not restrict in any way

Ends — 5 ft [1524 mm] Sides — 6 ft [1829 mm]

3Mounting holes may be used to mount unit to concrete pad They are not recommended for mount­ ing unit to spring isolators If spring isolators are used, a perimeter support channel between the unit and the isolators is recommended

4See Table 1 for rigging center of gravity (Dimensions X,Y) See Table 2A and 2B for A-D corner weights

5Circled numerals in Top View refer to condenser fans by position

TOP VIEW

10'-3 1/4

[313lM]

7'-1 1/2

(2)72«nl

RIG HOLES

-r-B 3/4'	r-8 3/4-
1528»] .	t528m]
HTG HOLES	HTG HOLES

— J0'-3'—

(3I25IM]

BASE OVERALL

SIDE VIEW

C4) RIO HOLES -2 5/8' DIA

(67»1

-r-6 3/4

1476»]

RIG HOLES

-r-3/4

(323»1

HTG HOLES

Fig. 2 — Dimensions — Units 38AH074,084

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VIEW 5-5

TOP VIEW OF CONTROL BOX SHELF WITH FIELD POWER SUPPLY CONNECTIONS

Chart 1, Field Power Supply Connections

	UNIT	VOLTAGE	Hz	DIAMETER — in. (mm)	QUANTITY
	38AH
		208/230	60	3% (92)	2
	094	460, 575,	60	3% (92)	1
		380
		346, 380/415	50	35/8 (92)	1

RELIEF VALVES LOCATED ON

COMPRESSORS A2 AND B1 ARE EQUIPPED

WITH A 3/8' SAE FLARE FOR

FIELD CONNECTION

SCALE 1:8

7'-11 9/16'

[2‘128mmD

(8) MTG HOLES	-7 -4 11/16'-
	[2252m(T)
7/32' DIA	HTG HOLES

-7'-7 11/16'-

C2326n<r[i}

BASE OVERALL

RIGHT-END VIEW

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)

2Unit must have clearances for airflow as follows: Top — Do not restrict in any way

Ends — 5 ft [1524 mm]

Sides — 6 ft [1829 mm]

3Mounting holes may be used to mount unit to concrete pad They are not recommended for mounting unit to spring isolators

4Two 3%" (92-mm) dia holes are recommended for parallel conductors on

208/230 V units.

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 and the isolators is recommended

7.See Table 1 for rigging center of gravity (Dimensions X,Y) See Table 2A and 2B for A-D corner weights

Fig. 3 — Dimensions — Unit 38AH094

4 5/8'

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ni7mml

oooo

VIEW 5-5

TOP VIEW OF CONTROL BOX SHELF

WITH FIELD POWER SUPPLY CONNECTIONS

CONTROL

BOX END

-3 7/16

C392mm]

MTG HOLES

Chart 1, Field Power Supply Connections

	UNIT	VOLTAGE	Hz	DIAMETER — in. (mm)	QUANTITY
	38AH
		208/230	60	3% (92)	2
	104	460, 575,	60	3% (92)	1
		380
		346, 380/415	50	3 5 /e (92)	1

RELIEF VALVES LOCATED ON

COMPRESSORS A2 AND B2 ARE EQUIPPED

WITH A 3/8' SAE FLARE FOR

FIELD CONNECTION

SCALE 1:8

(8) MTG HOLES 17/32' DIA

C13tnmJ

(4) RIG HOLES

2 5/8' DIA

[67mm]

2-3 11/16'

[703 mm]-

RIG HOLES

HINGED ACCESS	HINGED ACCESS
PANEL	PANEL
(CONTROL SIDE)	(POWER SIDE)

?'-ll 9/16'

(2428mm]

-7	-4 11/16 ---------	-1 1/2
	t2252mm)	[38mm]
	MTG HOLES	MTG HOLES
-7	-7 11/16'---------
	[2328mm]
	BASE OVERALL

LEFT-END VIEW

[764mm] CKT A

2 -10'-

[8S7mir] CKT B

RIGHT-END VIEW

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)

2Unit must have clearances for airflow as follows: Top — Do not restrict in any way

Ends — 5 ft [1524 mm] Sides —6 ft [1829 mm]

3Mounting holes may be used to mount unit to concrete pad They are not recommended for mounting unit to spring isolators

4Two 3%" (92-mm) dia holes are recommended for parallel conductors on

208/230 V units

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 and the isolators is recommended

7 See Table 1 for rigging center of gravity (Dimensions X,Y) See Table 2A and 2B for A-D corner weights

Fig. 4 — Dimensions — Unit 38AH104

ooooO о о о о

оооо

VIEW 5-S

TOP VIEW OF CONTROL BOX SHELF WITH FIELD POWER SUPPLY CONNECTIONS

SCALE UlO

-7 -4 11/16'-

[2253mra]

I HINGED ACCESS		HINGED ACCESS
I PANEL '		■ PANEL
(CONTROL SIDE)		(POWER SIDE)
TYPICAL		TYPICAL
BOTH ENDS		BOTH ENDS
' s|		is

(32) MTG HOLES 17/32' DIA.

[13mm]

RELIEF VALVES LOCATED ON THE COMPRESSORS ARE EQUIPPED WITH A 3/8' SAE FLARE FOR FIELD CONNECTION

SCALE 1:8

1 1/2-*

C38imn]

MTG HOLES

1'-4 7/8'—

C420n""l 1 r 1 /-)"

MTG HOLES' 1X4

MTG HOLES ' -4 3/4- i[425mir)

MTG HOLES

7'-4 1/2'-

f2247ti.ml BASE OVERALL

LEFT-END VIEW

r-3/4'

[323mm] *

MTG HOLES

- 18'-6 3/8'-

CSGSOmm]

SIDE VIEW BASE OVERALL

-1 -4 7/8

1 ' c- 1 /-)' (‘>28nim]

-1 -5 1/2 MTG HOLES

[444tntnD

MTG HOLES

1 1/2	T2 -3 11/16
	[703mmT

^[ЗВтт] RIG HOLES MTG HOLES

•- 1 '-3/4' C323mroJ

MTG HOLES

Chart 1, Field Power Supply Connections

	UNIT	VOLTAGE	Hz	DIAMETER	QUANTITY
	38AH			(in.)
		208/230	60	3% (92)	1
	124A	460, 575,	60	2V2 (63)	1
	124B	380
		346, 380/415	50	3% (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-124—	7260 lb (3293 kg)
38AH-124-C	8126 lb (3686 kg)

Unit must have clearances for airflow as follows: Top — Do not restrict in any way

Ends — 5 ft [1524 mm] Sides — 6 ft [1829 mm]

Mounting holes may be used to mount unit to concrete pad They are not rec­ ommended for mounting unit to spring isolators

One 3¥s" (92-mm) dia hole is recommended for single-entry power into each module (124A and 124B) of the 208/230-v units

Circled numerals in Top View refer to condenser fans by position

If spring isolators are used, a perimeter support channel between the unit and the isolators is recommended Do not support each module separately

Each module of the unit must be rigged into position separately The unit must not be rigged after modules have been connected.

8. Suction and liquid connections can exit on either side of the unit.

9. Field power supply connections are required for each module

10See Table 1 for rigging center of gravity (Dimensions K.L.X.Y) See Table 2A and 2B for A-D corner weights

Fig. 5 — Dimensions — Unit 38AH124

8

'Г

VIEW S-5

TOP VIEW OF CONTROL BOX SHELF

WITH FIELD POWER SUPPLY CONNECTIONS

SCALE 1:10

J HINGED ACCESS		HINGED ACCESS ,
\ PANEL '		> PANEL
(CONTROL SIDE)		(POWER SIDE)
, 1 TYPICAL		TYPICAL
•1 BOTH ENOS		BOTH ENDS
		■ Isl"

(32) MT6 HOLES 17/32' DIA.

[13mtn]

RELIEF VALVES LOCATED ON

THE COMPRESSORS ARE EQUIPPED

WITH A 3/8' 5AE FLARE FOR

FIELD CONNECTION

I -3/4'

СЭ23вя|] ИТ6 HOLES

-20'-6 1/8'- [6253inm]

BASE OVERALL

1 -1 -4 7/8' c- 1 /'i' (42ВямпЗ

I -b I/2 MTG HOLES

НТО HOLES

Chart 1, Field Power Supply Connections

	UNIT	VOLTAGE	Hz	DIAMETER —	QUANTITY
	38AH			in. (mm)
		208/230	60	ЗУ8 (92)	1
	134A	460, 575, 380	60	2Уг (63)	1
		346, 380/415	50	ЗУв (92)	1
		208/230	60	2Vi (63)	2
	134B	460, 575	60	2Уг (63)	1
		380	60	ЗУв (92)	1
		346, 380/415	50	ЗУв (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-134—	7507 ib (3405 kg)
38AH-134-C	8357 ib (3791 kg)

Unit must have ciearances for airfiow as foliows; Top — Do not restrict in any way

Ends — 5 ft [1524 mm] Sides — 6 ft [1829 mm]

Mounting hoies may be used to mount unit to concrete pad They are not recommended for mounting unit to spring isoiators.

One ЗУа" (92-mm) dia hoie is recommended for single-entry power into Module 134A and 208/230-v units Single entry power into Module 134B is not recommended

Circled numerals in Top View refer to condenser fans by position

If spring isolators are used, a perimeter support channel between the as­ sembled unit and the isolators is recommended Do not support each mod­ ule separately

Each module of the unit must be rigged into position separately. The unit must not be rigged after modules have been connected.

8Suction and liquid connections can exit on either side of the unit

9Field power supply connections are required for each module

10See Table 1A or 1В for rigging center of gravity (Dimensions K,L,X,Y). See Table 2A and 2B for A-D corner weights.

Fig. 6 — Dimensions — Unit 38AH134

Table ЗА — Units 38AH044-084 Physical Data — 50/60 Hz (English)

38AH				044		054		064		074		084
OPERATING WEIGHT WITH Cu-AI				3259		3309		3565		3812		4057
REFRIGERANT (Approx) — Lb Cu-Cu				3547		3597		3998		4229		4735
SHIP WEIGHT WITH COIL PROTECTION ONLY						3290
(Approx) — Lb Cu-AI	Cu-Cu			3250				3530		3780		4000
				3538		3578		3963		4197		4678
TYPICAL OPERATING REFRIGERANT								R-22
Charge (Approx) — Lb		Std		62		72		88		104		130
Qty of Circuits				2		2		2		2		2
		Opt		1		1		1		1		1
COMPRESSOR Type...Rpm		Std			Reciprocating Semi-Hermetic			1750 @ 60 Hz; 1458 @ 50 Hz				(6) B1
(Qty Cylinder) Compressor*			(4)A1	(4) B1	(4) A1	(6) B1	(6) A1	(6) B1	(6) A1	(6) B1	(6)A1
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
		Opt	17	17	21	17	21	21	19	21	19	19

Capacity Control Stepsf
CONDENSER FANS (6 Blade) — 60 Hz		4. .30
Qty...Dla (In.)					6 .30
Ainlow (Cfm)		35,000		52,000	I		51,000
Speed (Rpm)		1140			1140
Total Power (kW)		6.2			93
CONDENSER FANS (6 Blade) - ■50 Hz		4. ,30
Qty...Dia (in.)					6 .30
Airflow (Cfm)		35,000		52,000 I 51,000
Speed (Rpm)		950			950
Total Power (kW)		62			93
CONDENSER COIL		Enhanced Copper Tubes, Aluminum Lanced Fin					3 .17
Rows...Fins per in.	2...17	2...17	3...17	2...19
Face Area (sq ft)	80.5	80.5	80.5	116.7			1167
Storage Capacity (Lb per Circuit) at 120 F	35	35	55	55			80
CONNECTIONS
Suction, ODF (in.)**			2Va
Liquid, ODF (in.)**			%
Hot Gas Bypass, ODF (in.)			¥e

Table 3B — Units 38AH044-084 Physical Data — 50/60 Hz (SI)

38AH					044			054			064			074				084
OPERATING WEIGHT WITH			Cu-AI		1478			1501			1617			1729				1840
REFRIGERANT (Approx) — Kg			Cu-Cu		1609			1632			1813			1918				2148
SHIP WEIGHT WITH COIL PROTECTION ONLY			Cu-AI		1474			1492			1601			1715				1814
(Approx) — Kg
			Cu-Cu		1605			1623			1798			1904				2122
TYPICAL OPERATING REFRIGERANT											R-22			47 2				58 9
CHARGE (Approx) — Kg			Std		28 1			32 7			39 9
Qty of Circuits					2			2			2			2				2
			Opt					1			1			1				1
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		80	80		9 9	9 9		99	99		90		9.0		90
			Opt	80		80	99		80	9.9	Z	99	90		99		90		90
Capacity Control Stepsf												;
CONDENSER FANS (6 Blade) — 50 Hz							4.. 762							6		762
Qty...Dia (mm)
Airflow (L/s)								16 500					24 500			24 100
Speed (R/s)								15.8								15.8
Total Power (kW)								62								93
CONDENSER FANS (6 Blade) — 60 Hz							4.. 762							6. 762
Qty...Dia (mm)
Airflow (L/s)								16 500					24 500			24 100
Speed (R/s)								19.0								19.0
Total Power (kW)								62								93
CONDENSER COIL								Enhanced Copper Tubes, Aiuminum 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											2Va
Suction, ODF (in.)**
Liquid, ODF (in.)**											Ve
Hot Gas Bypass, ODF (in.)											%
	LEGEND						**For single-circuit units, suction ODF is 2% in. (66 7 mm) and liquid ODF is
Cu-AI								IVs in (28.6 mm) Single circuits have a factory-installed manifold; no
	— Copper tubes with aluminum fins							field modification is required.
Cu-Cu — Copper tubes with copper fins							NOTES:
ODF	— Outside Diameter, Female
Opt	—	Optional Single-Circuit Units					1 Certified dimensional drawings available on request
Std	—	Standard Dual-Circuit Units					2 Equivalent connection values in mm are as follows;

•Compressor A1 is lead on standard and optional single-circuit units	in.	mm
tCapacity control steps listed are for constant-volume units with no accesso­	%	15.9
ries Refer to Table 19A or 19B, page 46, for additional system capacity	%	22 2
information	2Ув	54 0

10

Table 4A — Units 38AH094-134 Physical Data — 50/60 Hz (English)

38AH				094				104							124													134
														124A					124B								134A				134B
OPERATING WEIGHT WITH	Cu-AI			5088				5435					3630*					3630*						3630*						3877*
REFRIGERANT (Approx) — Lb	Cu-Cu			5813				6160					4063*					4063*						4063*						4294*
SHIP WEIGHT WITH	Cu-AI			5630				5990					3907*					3907*						3907*						4080*
COIL PROTECTION AND SKID	Cu-Cu			6355				6715					4340*					4340*						4340*						4497*
(Approx) — Lb
TYPICAL OPERATING														R-22
REFRIGERANT CHARGE
(Approx) — Lb				148				135							88					88								88		104
Qty of Circuits				2					2						1					1								1				1
COMPRESSOR Type...Rpm							Reciprocating Semi-Hermetic. 1750 @ 60 Hz; 1460 @ 50 Hz																								(6)A1
(Qty Cylinder) Compressorf			(6)A1	(4)A2	(6)B1	(6)A1		M)A2		{6)B1		(6)B2		(6)A1			(6)A2		(6)A1			(6)A2				(6)A1			(6)A2			(6)A2
Model No. 06E			-275	-250	-299	-265		-250		-265							-265		-275			-265				-275			-265	-299		-275
														-275
												-265
Oil Charge (Pt)			21	17	19	21		17		21	21		21		21			21		21			21					21		19		21
Capacity Control Steps**
CONDENSER FANS (6 Blade) — 60 Hz																														6. .30
Qty...Dia (in.)				6. .30				6. .30					4, .30					4. .30					4. .30
Airfiow (Cfm)				52,000				52,000					35,000					35,000					35,000							52,000
Speed (Rpm)				1140				1140					1140					1140					1140							1140
Totai Power (kW)___________________				94					95						64					64								64				92
CONDENSER FANS (6 Biade) — 50 Hz																														6. .30
Qty...Dia (in.)				6. .30				6...30					4, .30					4. .30					4. .30
Airfiow (Cfm)				52,000				52,000					35,000					35,000					35,000							52,000
Speed (Rpm)				950				950					950					950					950							950
Totai Power (kW)				94					95						64					64								64				92
CONDENSER COIL				3...17				Enhanced Copper Tubes, Aluminum Lanced Fin																	3...17						2 .19
Rows...Fins per in.								3...17					'3...17					3...17
Face Area (sq ft)				128 3				128 3					80 5					80 5							80 5						1167
Storage Capacity				178				178					110					110							110						110
(Lb per circuit) at 120 F
CONNECTiONS															2%												2У8
Suction, ODF (in.)				2Ve					2Ve											2Ye												2Ye
Liquid, ODF (in.)				%					%					1Ув						V/a							1У8					1Ve
Hot Gas Bypass, ODF (in.)				Ys					Ya						Ye					Ya								Ye				Ye

Table 4B — Units 38AH094-134 Physical Data — 50/60 Hz (SI)

38AH			094			104				124				134
									124A		124B		134A			134B
OPERATING WEIGHT WITH	Cu-AI		2308			2465			1647*		1647*		1647*		1759*
REFRIGERANT (Approx) — Kg	Cu-Cu		2637			2794			1843*		1843*		1843*		1948*
SHIP WEIGHT WITH	Cu-AI		2554			2717			1860*		1860*		1860*		1851*
COIL PROTECTION AND SKID	Cu-Cu		2883			3046			1968*		1968*		1968*		1968*
(Approx) — Kg
TYPICAL OPERATING									R-22
REFRIGERANT CHARGE
			67 1			61 2			39.9		39 9		39 9		47 2
(Approx) — Kg
Qty of Circuits			2				2			1		1		1			1
COMPRESSOR Type...R/s		(6)A1	(4)A2	(6)B1	Reciprocating Semi-Hermetic.. 29 2 @ 60 Hz; 24 3 @ 50 Hz								(6)A1	(6)A2		(6)A1	(6)A2
(Qty Cyiiner) Compressorf					(6)A1	(4)A2	(6)B1	(6)B2	(6)A1	(6)A2	(6)A1	(6)A2
Modei No. 06E		-275	-250	-299	-265	-250	-265	-265	-275	-265	-275	-265	-275	-265	-299		-275
Oii Charge (L)		10	8	9	10	8	10	10	10	10	10	10	10	10	9		10
Capacity Controi Steps**			5
CONDENSER FANS (6 Blade) — 60 Hz			6.762			6.762			4.. 762		4.. 762		4.. 762		6.762
Qty...Dia (mm)
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)			94				95			64		64		64			92
CONDENSER FANS (6 Blade) — 50 Hz			6.762			6.762					4...762		4.. 762		6 ..762
Qty...Dia (mm)									4.. 762
Airflow (L/s)			24 544			24 544			16 520		16 520		16 520		24 544
Speed (R/s)			158			15.8			15 8		158		158		15.8
Total Power (kW)			94				95			64		64		64			92
CONDENSER COIL			3 .669 3			Enhanced Copper Tubes, Aluminum Lanced Ein							3 .669 3			2 .781 6
Rows...Fins per m						3. .669 3			3 669.3		3 669 3
Face Area (sq m)			11 9			11 9				75		75		75		10 8
Storage Capacity			81				81			50		50		50			50
(Kg per circuit) at 49 C
CONNECTIONS			2Ув			2Уа				2%						2%
Suction, ODF (in.)												2Ya		2Ya
Liquid, ODF (in.)			%				Va		1У8			V/a		V/a			1Ve
Hot Gas Bypass, ODF (in.)			%				Ya			Ya		%		Ya			Ye

LEGEND

Cu-AI — Copper Tubes with Aluminum Fins Cu-Cu — Copper Tubes with Copper Fins ODF — Outside Diameter, Female

'Includes piping and trim kit

fCompressors are shipped with minimum oil charge.

•'Capacity control steps listed are for constant volume units with no accesso­ ries Refer to Table 20, page 46, for additional system capacity information

NOTES:

1Unit 38AH124 consists of one 124A module and one 124B module Unit 38AH134 consists of one 134A module and one 134B module

2Certified dimensional drawings available on request

3Equivalent connection values in mm are as follows:

in. mm

Ya	15.9
Va	22 2
1У8	28 6
2Ув	54 0
2Ya	66 7

11

%

Fig. 7 — Modules 38AH124A or 134A — Shipping Locations of Piping and Sheet Metal Trim Kit

CONTROL

BOX

12

Step 3 — Make Refrigerant Piping

Connections

A CAUTION

The field-supplied liquid line solenoid valve must be in­ stalled 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 large suction lines to minimize friction 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 evapo­ rator 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 (thermo­ static 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).

Fig. 9 — Typical Module with Cover Panels

Removed

38AH044-084,124,134

SHIPMENT BOLTS

MOUNTING SPRINGS

SHIPMENT BOLTS

38AH094,104

13

To achieve good mixing of the refrigerant leaving the evapo­ rator 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 (for 38AH044084 optional single-circuit units). When the compressor is below the evaporator, the riser at the evaporator should ex­ tend 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 pressure drop. Figure 11 (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

			MAXIMUM LIQUID LIFT
UNIT 38AH	60 Hz			50 Hz
	Ft		M	Ft		M
044	69		21 0	57 5		175
054	75		23 0	75 0		23 0
064	75		23 0	65 0		19 8
074	45		137	37 5		11 4
084	75		23 0	75 0		23 0
094	55		167	46 0		140
104	50		152	42 0		128
124	75		23 0	65 0		19.8
134	45		137	37 5		11 4

LOCATION A

LEGEND

LLS — Liquid Line Solenoid

TXV — Thermostatic Expansion Valve

UNITS 38AH044-084 — Relieve the pressure caused by the holding charge into a refrigerant recovery system. Uneap the suction line and cut the run-around tube at the liquid line as close to the loop elbow as possible. This will leave ap­ proximately 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 eleetronic leak detector.

Purge nitrogen or reclaim R-22 from system after comple­ tion of leak-checking procedure. Repair leak if one is found. When finished, evacuate and dehydrate system using the meth­ ods described in Carrier GTACII (General Training Air Con­ ditioning II), Module 4, System Dehydration.

UNITS 38AH094-I34 — 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 cut­ ting the loop at the liquid valve. (See diagram below and Fig. 9.) 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.

	TOP VIEW
	FACTORY-INSTALLED
SUCTION	SUCTION LINE LOOP
LINE	LIQUID
	1---~-r . -I-
	r _ r LINE
	-CUT LINE

TXV

Fig. 11 — Required Location of Soienoid Valves and Recommended Filter Drier and Sight Glass Locations for

38AH044-084 Dual-Circuit and 38AH094-134 Units.

14

SIGHT GLASS	THERMOSTATIC
	EXPANSION VALVES

DRIER

OPTION B

DUAL FILTER

DRIER ARRANGEMENT

		SIGHT GLASS	THERMOSTATIC
	SIGHT GLASS		EXPANSION
		LOCATION B	VALVES
	LOCATION A

Fig. 12 — Required Location of Soienoid Vaives and Recommended Fiiter Drier and Sight Giass Locations for 38AH044-084 Optionai Single-Circuit Units

u

\

■ CONDENSING

------- 1—UNIT

3 FT MAX (914 mm)

LEGEND

A— Pipe A, Suction Riser, without Trap

B— Pipe B, Suction Riser with Trap

C	— Suction Lineto Condensing	Unit
D	— Pipe D, Suction Riser Short Lift
RED.	— Reducer
STR	— Street

NOTES-

1 Short riser, pipe D, is used when routing suction iine to condens­ ing unit connection See table at right

2. See Tables 7A, 7B, 9A, and 9B for values of A, B, and C.

\

				PIPE D DIAMETER
UNIT			Dual Circuit*				Singie Circuit*
38AH	A			B
	in.		mm	in.		mm	in.	mm
044	1%		41	1%		41	21/8	54
054	1%		41	1%		41	21/8	54
064	1%		41	21/8		54	21/a	54
074	21/0		54	21/8		54	21/8	54
084	21/8		54	21/8		54	2%t	67t
094, 104	21/8		54	21/8		54	—	—
124, 134	2%		67	2%		67	—	—
‘Maximum iength of riser is 3 ft (914 mm).							unioader is fieid
tDouble suction riser required if accessory
instaiied

Fig. 13 — Double Suction Riser Construction

15

Table 6A — Refrigerant Piping Requirements — 38AH044-104 Dual-Circuit Units — 60 Hz

TOTAL LINEAR LENGTH OF INTERCONNECTING PIPE — FT (M)

UNIT 38AH

15-25

25-50

50-75

75-100

100-150

150-200

(4.6-7.6)

(7.6-15.2)

(15.2-22.9)

(22.9-30.5)

(30.5-45.7)

(45.7-61.0)

L

s

L

S

L

S

L

S

L

S

L

s

044

Ckt A

%

1%

У8

1У8

Ув

2Ув

Уе

2Уе

Уе

2Ув

Va

2Ув

Ckt В

%

1%

У8

1%

Ув

2Ув

Ув

2Ув

Va

2Уе

Va

2Ув

054

Ckt A

%

1%

У8

1%

Ув

2Ув

Va

2Ув

Va

2Ув

Va

2Ув

Ckt В

У8

1%

У8

2У8

Ув

2Ув

1Ув

2Ув

1Ув

2Ув

1У8

2%*

064

Ckt A

%

1%

У8

2Ув

Ув

2Ув

Уе

2Ув

1Уе

2Ув

1Ув

2%t

Ckt В

%

2Ve

У8

2Ув

Ув

2Ув

1Ув

2Ув

1У8

2%

1У8

2%

074

Ckt A

%

2Ve

У8

2Уа

Ув

2Ув

1Ув

2Ув

1Ув

2%t

1У8

2%t

Ckt В

%

2V8

1У8

2У8

1У8

2Ув

1Ув

2%

1Ув

2%

1%

2%

084

Ckt A

%

2V8

1Ув

2Ув

1Уе

2Ув

1У8

2%t

1%

2%t

1Ув

2%t

Ckt В

V8

2Уа

1У8

2Ув

1Ув

2Ув

1Ув

2%

1У8

2%

1Ув

2%

094

Ckt A

%

2V8

1Уб

2Уа

1 Ve

2%t

1Ув

2%t

1%

2%t

1%

ЗУв“

Ckt В

%

2Ve

Ув

2У8

V/a

2Ув

1Ув

2%

1Уа

2%

1Ув

2%

104

Ckt A

%

2Ув

1У8

2Ув

1Ув

2%t

1Уз

2%t

1Ув

2%t

1У8

ЗУв“

Ckt В

%

2Ув

1Уб

2Ув

1Ув

2Уе

1Ув

2%

1%

ЗУв“

1У8

ЗУв“

		LEGEND
CV — Constant Volume
L — Liquid Line
S	— Suction Line
VAV — Variable Air Voiume
‘Double		suction	riser required	on units with		field installed		unloader
	on circuit В compressor if condensing unit is elevated above
	evaporator.
tDouble		suction	riser required	on units with		field installed		unloader
	on circuit В 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	В compressor		is		not
	recommended
2	38AH094 and 38AH104 piping sizes apply only to factory								sup­
	plied unit configurations They do NOT take into account any field
	installed unloaders
3	Piping sizes are based on unit operation above 40 F (4 4 C) satu­
	rated	suction	temperature	(SST)	When	operating	below		40	F
	(4 4 C), refer to Carrier System Design Manuai, E20-IÌ piping de­
	sign 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.

5 Suction and liquid line sizing is based on pressure drop 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 el­

evated above the evaporator See	footnotes	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

in. mm

%15.9

Уе	22.2
v/a	28.6
V/a	34 9
V/a	41 3
2Уа	54 0
2%	66 7
ЗУв	79 4
3%	92 1

Table 6B — Refrigerant Piping Requirements for Double Suction Risers,

38AH054-104 Duai-Circuit Units — 60 Hz

						TOTAL LINEAR LENGTH OF INTERCONNECTING PIPE — FT (M)
UNIT 38АН				50-75				75-100				100-150			150-200
				15.2-22.9)				(22.9-30.5				30.5-45.7			(45.7-61.0
			A	В		С	А		В	С	А	В	С	А		В	С
054		Ckt А	_	—		—	—		—	—			—
		Ckt В									___	___		V/a		2Ув	2%
064		Ckt A	_			—	—		—	—		—		V/a		2Va	2%
		Ckt В		___							___		___
074		Ckt A	_			—	—			—	1Ув	2Ув	2%	1Ув		2Уа	2%
		Ckt В		___					___
084		Ckt A	_	—		—	1Ув		2Уе	2%	1Уе	2Ув	2%	V/a		2Va	2%
		Ckt В
094		Ckt A	1У8	2Ув		2%	V/a		2Ув	2%	1%	2Ув	2%	V/a		2%	ЗУв
		Ckt В
104		Ckt A	1Ув	2Ув		2¥а	V/a		2Ув	2%	1Ув	2Ув	2%	V/a		2%	ЗУв
		Ckt В	—	—		—	—		—	—	1Ув	2%	ЗУв	V/a		2%	ЗУв

LEGEND

—— Not Required

Pipe A — Suction Riser Without Trap

Pipe B — Suction Riser With Trap

Pipe C — Suction Line to Condensing Unit

NOTES.

1See Refrigerant Piping Requirements table at top of page to de­ termine need for double suction risers.

2Pipe sizes are based on the total linear length, shown for each column, plus a 50% allowance for fittings.

Suction and liquid line sizing is based on pressure drop equivalent to 2 F (1 1C) at nominal rating conditions Higher design pressure drop criteria may allow selection of smaller pipe sizes but at a pen­ alty of decreased system capacity and efficiency.

Refer to Carrier System Design Manual or to E20-II design programs for further information on selecting pipe sizes for split systems

All pipe sizes are OD inches. See Table 6A notes for metric equivalents

Refer to Fig. 13 for double suction riser construction

16

Table 7A — Refrigerant Piping Requirements, 38AH044-104 Dual-Circuit Units — 50 Hz

TOTAL LINEAR LENGTH OF INTERCONNECTING PIPE — FT (M)

UNIT

15-25

25-50

50-75

75-100

100-150

150-200

38AH

(4.6-7.6)

(7.6-15.2)

(15.2-22.9)

(22.9-30.5)

(30.5-45.7)

(45.7-61.0)

L

S

L

S

L

s

L

s

L

s

L

s

044

Ckt A

%

1%

%

1%

%

1%

%

2У8

Va

2Уе

Va

2У8

Ckt В

%

1%

%

1%

Va

1%

Va

2У8

Va

2Va

Va

2У8

054

Ckt A

%

1%

Va

1%

Va

1%

Va

2Уб

Va

2Va

Va

2У8

Ckt В

%

Wa

Va

1%

Va

2У8

Va

2Уа

^Va

2Va

1У8

2%*t

064

Ckt A

%

Wa

Va

1%

Va

2yst

Va

2Va\

V/a

2Va\

1У8

2%”

Ckt В

%

1%

Va

2У8

Va

2Va

V/a

2%*

' 1У8

2%’

2Ув

Va

074

Ckt A

%

1%

Va

2Уа

Va

2Ув

Va

2Va

^Va

2%t

1У8

2%t

Ckt В

%

2Ув

Va

2Уб

1У8

2Ув

1У8

2%

V/a

2%

1У8

2%

084

Ckt A

%

2Va

Va

2Ув

1У8

2Ув

1У8

2%t

1У8

2Щ

1У8

2%t

Ckt В

%

2Va

Va

2Ув

1Ув

2У8

1Уа

2%

1У8

2%

1У8

2%

094

Ckt A

%

2Va

IVe

2Ув ^

1У8

2%”

1У8

2%”

1У8

2%”

1%

ЗУв”

Ckt В

%

2Va

%

2Уе

1У8

2У8

1У8

2¥8*t

1У8

2%*t

1У8

2%’t

104

Ckt A

%

2Va

Va

2Ув

1У8

2Уа

1У8

2%”

1У8

2У8**

1%

ЗУе”

Ckt В

%

2Va

1У8

2Ув

1У8

2%

1У8

2Va

1%

2%

1%

ЗУ8”

LEGEND

CV — Constant Volume

L — Liquid Line

S — Suction Line

VAV — Variable Air Volume

’Double

suction

riser

required

on units with

field installed

unloader

on circuit B compressor if condensing unit is elevated above

evaporator.

TDouble

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

sup­

plied unit configurations They do NOT take into account any field

installed unloaders

i.

3 Piping sizes are based on unit operation above 40 F (4 4 C) satu­

rated

suction

temperature

(SST)

When

operating

below

40

F

(4 4 C), refer to Carrier System Design Manual, E20-II piping de­ sign 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

5. Suction and liquid line sizing is based on pressure drop 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 el­

	evated above the evaporator See			footnotes	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
		in.		mm
		Va		159
		Va		22 2
		V/a		28 6
		V/a		34 9
		V/a		41 3
		2Va		54 0
		2Va		66.7
		ЗУ8		79 4
		ЗУ8		92 1

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

50-75

75-100

100-150

150-200

38AH

15.2-22.9)

(22.9-30.5)

30.5-45.7)

45.7-61.0

A

В

C

A

В

С

А

В

С

А

В

С

054

Ckt A

—

—

—

—

V/a

2Уа

25/8

Ckt В

___

___

___

___

___

064

Ckt A

1%

V/a

2У8

V/a

V/a

2Ув

15/8

15/8

2У8

V/a

2Уа

25/8

Ckt В

—

—

—

—

—

—

15/8

2Уа

25/8

V/a

2Уа

25/8

074

Ckt A

—

15/8

2Уа

25/8

V/a

2Уа

25/8

Ckt В

___

___

___

___

___

084

Ckt A

—

V/a

2У8

25/8

15/8

2Уа

25/8

V/a

2Уа

25/8

Ckt В

___

___

094

Ckt A

V/a

2Vs

2%

V/a

2Уз

25/8

15/s

2Уа

25/8

V/a

25/8

ЗУз

Ckt В

—

—

—

V/a

2Ув

25/8

15/8

2Уа

25/8

V/a

2У8

25/8

104

Ckt A

—

—

—

V/a

2Уе

25/8

15/8

2Уа

25/8

V/a

25/8

ЗУб

Ckt В

—

—

—

—

—

—

—

—

—

V/a

25/8

ЗУ8

LEGEND

—— Not Required

Pipe A — Suction Riser Without Trap

Pipe B — Suction Riser With Trap

Pipe C — Suction Line to Condensing Unit

NOTES:

1See Refrigerant Piping Requirements table at top of page to de­ termine need for double suction risers

2Pipe sizes are based on the total linear length, shown for each column, plus a 50% allowance for fittings.

3. Suction and liquid line sizing is based on pressure drop equivalent to 2 F (1 1C) at nominal rating conditions. Higher design pressure drop criteria may allow selection of smaller pipe sizes but at a pen­ alty of decreased system capacity and efficiency.

4. Refer to Carrier System Design	Manual or to E20-II design
programs for further information on	selecting pipe sizes for split

systems

All pipe sizes are OD inches. See Table 7A notes for metric equivalents

Refer to Fig. 13 for double suction riser construction

17