Carrier 38AD028 User Manual

Carrier
and Service Instructions
38AB.AD
024thro 084
Air-Cooled Condensing Units
Table 1 — Dimensions
UNIT
38AD 38AD
024 028
38AD
034
38AD
044
38AB
054
38AB
064
38AB
084
DIMENSIONS (Ft—in
i.)
Length
A
o
1
CO
12-10%
24- -4
24-4
Width
B
3-11%
4-10%
6- 0‘/ 4
3-11%
4-10%
6- 0%
Height w/o Legs
C
2- 4%
3- r/ 8
3- 2
2- 4%
3- r/ 8
3- 1%
Leg Height
D
1-0 or 2-0
1 —6 or 2—2
1- 8
1 -4 or 2-0
1-6 or 2-2
1 _8 or 2—
Mtg Holes
< J
O
1
sC
o
1
0- 1% 2—%
0- 1%«
0- 1%6
0- 1%
Corner Legs
Ik
3- 8% 3- 8%
4- 7%
5- 7%
00
1
CO
4- 7%
5- 9%
o
i
o
o
1
o
o
1
o
2-%
o
1
o
o
I
o
o
I
o
Middle Legs
Ik
3-10 1 3-10
00
1
xr
5- 7%
CO
1
o
CO
1
XT
5~ioy 2
L
3-3%
3- 7% 6
9-4%
M
9-4%
00
o
5-3%
N
|
1 -
-
9-5%
CONNECTIONS (in
.)
Suction (ODM)
l-%
2-%
2-V
Liquid (ODM)
%
7 /s
1 —%
OPENINGS (in.)
Suction
E
2-%
4
5
(2)5
Liquid
F
1- % I 1- %
1 i- %
2
2-%
3
7/
Control (4 holes)
G
%
1 — 5 4
1
k
Power
H
3-%
5
s-%
(2)3%
*Unit 38AB084 has two suction connections
AIR FLOW
GUSSET -pf
REMOVABLE , n o . HINGED CONTROL
TOP COVER BOX DOOR
\oNLY) 2 NI t Y) REQUIRED OVERHEAD
FL0W*\Ef/ F / E Al 5 ff ACE
38AD024
028, 034
A ^tt
w
i Ckii
mm
'4-0 (BOTH SIDES)
4-0 *.,
(BOTH SIDES)"
-REMOVABLE
END PANELS
HINGED ACCESS DOOR- REQUIRED OVERHEAD
CONTROL BOXi ~ AIR SPACE
AIR FLOW
GUSSET P"
A>
;_HINGED POWER
: BOX DOOR
‘ 4-0"(BOTH SIDES)
38AD044
4 1 - o"——
(BOTH SIDES)
REMOVABLE
END PANELS
AIR FLOW
BOTTOM PANELREMOVABLE REAR
OPENINGPANEL
f Px^Removable top requi
Ilf( COVER OVER!
FLOW AIR SI
HINGED AIR
control V
box covers
/^REMOVABLE TOP REQUIRED
/ COVER OVERHEAD
^^ • AIR FLOW AIR SPACE
38AB054,
064, 084
O' I? \i
4-0 X;
(BOTH SIDES)
'X 4 - 0 "
(BOTH SIDES)
AIR FLOW THRU
CONDENSER
11 SPACE FOR SERVICE
AND AIR FLOW
Certified dimension drawings are available on request
Fig. 1 — Dimensions
©Carrier Corporation 1972
Form 38AD-6SI

Carrier 38AD028 Specifications

General

Model	38AD028
Refrigerant	R-410A
Voltage	208/230
Phase	1
Compressor Type	Scroll
Maximum Operating Ambient Temperature (Cooling)	115°F
Cooling Capacity (BTU/h)	28000

Summary

Air-Cooled Condensing Units

Rigging and Lifting

Erecting and Unit Integration

Guidance on positioning and assembling unit components, including legs and gussets.

Compressor Mounting and Fan Thermostat

Motormaster Head Pressure Control

Details on installing and configuring the Motormaster head pressure controller.

Integrating 38AB Units

Refrigerant Piping and Driers

Wiring and Electrical Data

Power Wiring Installation

Suction Piping and TXV Bulb Location

Start-Up Procedures

Preliminary Checks

Charging and System Service

Capacity Control Adjustment

Details on adjusting set points and pressure differentials for capacity control.

Control Circuit Operations

Compressor Motor Protection

Explanation of temperature sensors, modules, and protection mechanisms for motors.

Winter Start Control