Carrier 38AD028, 38AD044 User Manual

Carrier	Instaitation, Start-Up
	at|d Service Instructions

024thru084

Air-Cooled Condensing Units

Table 1 — Dimensions

38AD

38AD

38AD

38AD

ЗВАВ

38АВ

38АВ

024

028

034

044

054

064

084

DIMENSIONS (ft-in

.)

13-0

12 -10%

24-4

24-4

Length

A

Width

В

3~ 11У4

4-ЮУ4

6 - ОУ4

3-11У

4- 1ОУ4

6- ОУ4

Height w/o Legs

C

2-

4Ve

3- 1У

3 - 2

2- 4У

3-

Г/в

3- 1Ув

Leg Height

D

1-0 or 2-0

1 —6 or 2—2

1 - 8

Ì —4 ог 2—0

1-6 ОГ 2—2

1 _8 ог 2-4

Mtg Holes

0- 1У2

0- 1Уб

0-

r/i6

0- ly

Corner Legs

0- 1У2

0- ly

2 -У

li

3- 8V4

3- 8У4

4- 7У4

5 - 7У

3- 8У

4- 7У

5- 9У4

Middle Legs

( J

0- OVe

0- 0%

0- оу

2 -У

0- ОУв

0-

ОУв

0- ОУв

IK

3-10

3-10

4- 8У

5 - 7У

3-10

4-

8У

5-10У

L

3-3Ve

3 - 7Уб

9 -4У

M

9-4Уа

8 -юу

5 -ЗУ4

N

-

-

9 -5У

CONNECTIONS (in

)

1-Ув

2-У

2 -Ve*

Suction (ODM)

Liquid (ODM)

%

V

1

OPENINGS (in.)

(2)5

2-У

4

5

Suction

E

Liquid

F

1- %

1- У

1- У4

2

2-У4

3

Control (4 holes)

G

Ув

1-У

1

%

Power

H

З-Ув

5

З-У4

(2) ЗУ

*Unit 38AB084 has two suction connections

REMOVABLE

HINGED CONTROL

TOP COVER g|4, BOX DOOR

\0NLY)	REQUIRED OVERHEAD
A I R F L O W # \^'; / /
_ _____ _ |H o"U
GUSSET

	AIR FLOW	BOTTOM PANEL	REMOVABLE REAR
		OPENING	PANEL
	GUSSET '‘t
		E F	REQUIRED
			OVERHEAD
			AIR SPACE
			8'-0"

\^^si|^4-0"(B0TH SIDES)

38AD024 028, 034

4-0-Ny/ REMOVABLE

(BOTH SIDES)^ END PANELS

CONTROL \,
BOX COVERS	\

HINGED ACCESS DOOR-		REQUIRED OVERHEAD
	CONTROL BOXi	AIR SPACE
AIR FLOW		8-0"	38AB054,
GUSSET		HINGED POWER
		BOX DOOR	064,084	4'-0"
			(BOTH SIDES)	(BOTH SIDES)
		?	• AIR FLOW THRU	m SPACE FOR SERVICE
		4'-0"(B0TH SIDES)	CONDENSER	AND AIR FLOW
38AD044	A..'- - ’ l l —
------------	^REMOVABLE
(BOTH SIDES)		END PANELS	Certified dimension drawings are available on request

Fig. 1 — Dimensions

©Carrier Corporation 1972

Form 38AD-6SI

Lift unit at points G,H, J, and K (Fig. 2). Use eyebolts and washers supplied in parts package. Do not sling unshielded unit Skidded unit may be slung, provided sling does not contact unit sides. Do not roll unskidded unit on pipes or wooden pilings.

	COIL		COM PR
	SECTION		SECTION
			4-
r A -			4 ^
COIL		COMPR	COIL 1
SECTION		SECTION :	Ml SECTION 1
“! . p		^ -	f j

Fig. 2 — Weight Distribution and Lifting Points

Table 2 — Weight Distribution

			WEIGHT (lb)
UNIT	Total			Leg Location
		A	B	C		D	E	F
38AD024	1750	175	175	575		575	125	125
38AD028	1900	178	178	521		565	207	251
38AD034	2300	263	263	767		767	120	120
38AD044	3200	359	359	770		810	441	461
38AB054	3145	180	605	607		181	-	-
38AB064	3830	245	712	714		244		-
38AB084	4960	327	913	913		327		-

SKID REMOVAL

Remove the four bolts (each section) holding top frame in place and lift frame from unit (38AD024 thru 044 and 38AB054,064 units).

Compressor (with coil) Section — Raise and block up one side of unit 8 inches. Remove the three exposed hold-down bolts from base skid. Lower unit and repeat on opposite side.

Coil (only) Section (38AB054,064 and 084) —

Raise and block up one end of unit 8 inches. Remove the two exposed hold-down bolts from base skid. Lower unit and repeat on opposite end.

ERECTING AND INTEGRATING ONE UNIT

Position Units 38AD028,044 and 38AB054, 064,084 so air flow is unrestricted on all sides and on top (Fig. 1).

38AD024,034: any side except compressor end may be installed against a wall if high leg setting is used and other three sides are unrestricted.

Erect UnifeusMf^legs and gussets attached to unit base skid(s) or frame. Adjust all corner legs to desired height before attaching to unit.

38AD024,028,034 AND 044 UNITS - Block up or suspend unit. With field-supplied bolts, bolt corner leg and angle gusset to each corner of unit. Bolt two center legs to bottom of unit where compressor and coil sections meet. Lower unit.

38AB054,064 AND 084 UNIT - Block up or suspend compressor (with coil) section. Bolt corner leg and angle gusset to each corner at coil end. Bolt two center legs to compressor end. Allow one set of holes to project out past compressor section. Bolt two center legs to bottom of unit where compressor and coil sections meet. Lower unit.

Block up or suspend coil (only) section. Bolt two corner legs and angle gussets to coil return bend end. Butt coil (only) section against com­ pressor compartment, allowing cod to rest on leg projections. Remove top cover on compressor compartment and bolt sections together at legs and sides.

Table 3 — Legs and Gussets Provided

				QUANTITY
	38AB	38AD	Corner	Center	Angie	Parts
			Leg	Leg	Gusset	Pkg*
	-	024,028	4	2	4	1
		034
	-	044	4	2	-	1
	054,064	-	-	4	-	1
	084	-	4	-	4	1

‘Parts packages in units contain all mounting fasteners required for attaching legs and gussets

CORNER LEG

CENTER LEG

							ANGLE
							GUSSET
	38AD	38AD	38AD	38AD	38AB	38AB	38AB
	024	028	034	044	054	064	084
A(in.)	16	16	18 0		16	18	20
B(in.)	24	24	26	20	24	26	28

‘Only 044 units use one-piece legs

Place 38AB and 38AD units on high leg setting if
accessory damper is used.	Fig. 3 — Legs and Gussets

Compressor Mounting

38AD024,028,034 UNITS - As shipped, com­ pressor is held down by special self-locking bolts and plain lockwashers. After unit is installed, remove the self-locking bolts one at a time and reassemble with flanged washers and neoprene snubbers as shown in Fig. 4. Special flanged wash­ ers and neoprene snubbers are shipped in a cloth bag tied to one of the compressor feet. Tighten all four bolts. Then, loosen each until the flanged washer can be moved sidewise.

38AD044, 38AB054,064 AND 084 UNITS (com­ pressors are mounted on a common support channel) — Remove the four shipping bolts from mounting channels prior to start-up.

Fig. 4 — Compressor Mounting

(38AD024,028 and 034)

Fan Thermostat — Route the thermostat control bulb and capillary (located in compressor section) thru grommeted hole in compressor section base pan. Do not kink capillary. Position bulb in inlet air stream and secure to inlet air flange adjacent to compressor section. Use clamp and screw provided in parts package.

If accessory head pressure control damper section is used, secure bulb to air inlet side of damper. Use hole in damper frame.

Integrate Unit (38AB054,064 and 084 only) —

Connect refrigerant piping between the two sec­ tions, using materials furnished with unit. Arrange discharge and liquid lines as shown in Fig. 5 and braze as indicated.

Electrically connect unit control box and junc­ tion box on coil (only) section by using flexible fan conduit furnished in the unit. Use the mating, quick-connect, polarized plugs furnished in the two sections to make the wire connections.

Motormaster® (32 Series) Head Pressure Controller

— Refer to MOTORMASTER Instructions shipped with this accessory, plus the following information.

Control box and sensor location is shown in Fig. 6.

Electrical connections are shown in Fig. 7. Refer to unit label diagram as required. On 200-,

208and 230-volt units, outdoor fan motor no. 1 (OFMj), located nearest the compressor, may be used with MOTORMASTER without modification. For 460and 575-volt units, refer to Tabled for field-supplied components needed with MOTORMASTER.

Fig. 5 — Refrigerant Connections

Fig. 6 - MOTORMASTER Control Box

and Sensor Location

*Use 230-vo)t controller with 200-,208- or 230-volt motors

Fig. 7 — Motormaster® Electrical Connections

Table 4 — Components Required for

MOTORMASTER Use

	UNIT	MODEL	RUN	TRANS­	MOTOR
			CAPACITOR	FORMER
	38AD024	600	HC96LH020	HT01AH951	HC46VL220or
		100		HT01AH959	HC46VL221
	38AD028
	38AD034	600		HT01AH952
	38AD044		HC96LH030		HC52TE230
	38AB054	100		HT01AH954
	38AB064
	38AB084

REFRIGERANT PIPING

Refrigerant Line Sizes will depend on length of piping required between condensing unit and evap­ orator. Consideration must be given to liquid lift and to compressor oil return. Refer to Part 3 of Carrier System Design Manual for line sizing information and Fig. 8 for recommended piping details.

Single Pumpout Control — All units are factory wired to operate on single pumpout control and require a field-supplied liquid line solenoid valve, sized for minimum pressure drop, to be installed immediately ahead of each expansion valve. If unit is to be used with a chiller, wiring modifications may be necessary. Refer to 38AB Application Data, Chilled Water Applications.

Refrigerant Drier and Moisture Indicator — A filter-drier(s) and a liquid-moisture indicator are shipped with unit for field installation. Refer to Fig. 9 for typical recommended piping arrange­ ments and to Table 5 for physical data on driers.

Receiver — No receiver is provided with unit. It is recommended that one not be used.

Piping Procedure — Do not remove plastic dust plugs from suction and liquid line stubs in com­ pressor compartment until piping connections are ready to be made. Pass nitrogen or other inert gas thru piping while brazing, to prevent formation of copper oxide.

NOTES	2 D as used in 8D etc, indicates the pipe diameter size as a measure of length
1 Lower split first on, last off	3 TXVE indicates Thermostatic Expansion Valve Equalizer Connection
	Fig. 8 — Typical Piping Connections for Face Split Coils

T7T