Carrier 38AD028, 38AD044 User Manual

Carrier

Instaitation, Start-Up

at|d Service Instructions

Air-Cooled Condensing Units

Table 1 — Dimensions

024 thru 084

38AD

024 028

DIMENSIONS (ft-in

Length Width

Height w/o Legs Leg Height Mtg Holes

Corner Legs

Middle Legs

CONNECTIONS (in

Suction (ODM)

Liquid (ODM) %

OPENINGS (in.)

Suction

Liquid

Control (4 holes)

Power

*Unit 38AB084 has two suction connections

A В

C D 1-0 or 2-0 1 —6 or 2—2

0- 1У2

( J

3- 8V4

0- OVe

3-10

L M

- -

)

E F

1- %

38AD

11У4

4Ve

0- 1У2

3- 8У4

0- 0%

3-10

1- У

13-0

3-3Ve 9-4Уа

1-Ув

2-У

Ув

З-Ув

38AD

044

-10%

- 2

1 - 8

-У

- 7У

-У

- 7У

- 7Уб

-юу

2-У

38AD

034

4-ЮУ4 6 - ОУ4

3- 1У 3

0- ly

4- 7У4

0- оу

4- 8У 5

4 5

1- У4

1-У

ЗВАВ

054

24-4

3-11У

2- 4У

Ì —4 ог 2—0 1-6

0- 1Уб

3- 8У

0- ОУв

3-10

2-У4

З-У4

38АВ

064 084

4-1ОУ4 3-

Г/в

ОГ 2—2

7У ОУв

r/i6

1 _8 ог 2-4

4- 8У

-4У

-ЗУ4

-5У

-Ve*

38АВ

24-4

6- ОУ4

3- 1Ув

0- ly

5- 9У4

0- ОУв

5-10У

(2)5

(2) ЗУ

REMOVABLE HINGED CONTROL TOP COVER g|4, BOX DOOR

\0NLY) REQUIRED OVERHEAD

AIRFLOW# \^'; / /

_ _____

_ |H o"U

GUSSET

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

38AD024 028, 034

4-0-Ny/ REMOVABLE

(BOTH SIDES)^ END PANELS

HINGED ACCESS DOOR-

CONTROL BOXi

AIR FLOW

GUSSET

38AD044

A..'- -’ll —

------------

(BOTH SIDES) end panels

REQUIRED OVERHEAD

AIR SPACE

8-0"

HINGED POWER BOX DOOR

4'-0"(B0TH SIDES)

^removable

GUSSET '‘t

CONTROL \,

BOX COVERS \

38AB054,

064,084

• AIR FLOW THRU

Fig. 1 — Dimensions

AIR FLOW

CONDENSER

BOTTOM PANEL

OPENING

E F

(BOTH SIDES)

Certified dimension drawings are available on request

REMOVABLE REAR

m SPACE FOR SERVICE

PANEL

4'-0"

(BOTH SIDES)

AND AIR FLOW

REQUIRED OVERHEAD

AIR SPACE

8'-0"

©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.

COM PR

SECTION

4 ^

COIL 1

Ml SECTION 1

f j

r A -

“! . p

COIL

SECTION

COIL

SECTION

COMPR

SECTION :

^ -

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

Fig. 2 — Weight Distribution and Lifting Points

Table 2 — Weight Distribution

WEIGHT (lb)

UNIT

38AD024 38AD028 38AD034 38AD044 38AB054 38AB064 38AB084

Total

1750 175

1900 2300 3200 3145 180 3830 245 4960 327

178 178 521 263 263 767 359

A B C D E

Leg Location

175 575

359 770 605 607 712 714

913 327

913

125

575 565 767 120 120 810 441

181

244

125

207 251

461

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.

Place 38AB and 38AD units on high leg setting if

accessory damper is used.

QUANTITY

38AB 38AD

024,028

054,064

084

‘Parts packages in units contain all mounting fasteners required

for attaching legs and gussets

CENTER LEG

A(in.) B(in.)

‘Only 044 units use one-piece legs

034 044

38AD

024

24 24

Corner

Leg

- - 4 -

38AD

38AD 38AD

028 034 044

16 18 0

Center

Leg

CORNER LEG

26 20

Angie Gusset

38AB

054 064

Fig. 3 — Legs and Gussets

Parts Pkg*

- 1

4 1

ANGLE

GUSSET

38AB 38AB

084

26 28

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.

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

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-,

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

38AD024

38AD028 38AD034 38AD044 38AB054 38AB064 38AB084

600

100

600

100

RUN

CAPACITOR

HC96LH020

HC96LH030

TRANS

FORMER

HT01AH951 HT01AH959

HT01AH952 HT01AH954

MOTOR

HC46VL220or HC46VL221

HC52TE230

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 1 Lower split first on, last off

T7T

2 D as used in 8D etc, indicates the pipe diameter size as a measure of length 3 TXVE indicates Thermostatic Expansion Valve Equalizer Connection

Fig. 8 — Typical Piping Connections for Face Split Coils

+ 8 hidden pages