Carrier 38AD 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 38AD Specifications

General

Brand	Carrier
Model	38AD
Category	Air Conditioner
Language	English

Summary

RIGGING Procedures

Skid Removal Steps

Process for removing skid from unit sections.

Unit Erection and Integration

Steps for positioning and assembling unit components.

Compressor Mounting Instructions

38AD 024-034 Compressor Mount

Procedure for mounting compressor using self-locking bolts.

38AD 044 & 38AB 054-084 Compressor Mount

Procedure for mounting compressors on a common support channel.

Fan Thermostat Installation

Integrate 38AB 054-084 Unit Sections

Motormaster Head Pressure Control

Refrigerant Piping Guidelines

Refrigerant Line Sizing

Factors affecting refrigerant line sizing for optimal performance.

Single Pumpout Control Setup

Requirements for installing single pumpout control system.

Refrigerant Drier & Moisture Indicator

Instructions for installing filter-drier and moisture indicator.

Refrigerant Piping Procedure

Steps for safe and effective piping connections and brazing.

Thermostatic Expansion Valve Installation

Suction Piping and TXV Bulb Location

Unit Safety Relief System

Wiring and Electrical Data Overview

Power Supply Requirements

Ensure power supply matches unit nameplate rating for safe operation.

Power Wiring Installation

Guidelines for installing branch circuit disconnect and power wiring.

Electrical Data Specifications

Control Circuit Wiring Guide

Remote Control Wiring Options

Line Voltage Remote Control Setup

Wiring for line voltage thermostat and liquid line solenoid.

Low-Voltage Remote Control Setup

Wiring for low-voltage accessories and solenoids.

Unit Start-Up Procedures

Preliminary Start-Up Checks

Essential checks before powering up the unit.

Refrigerant System Leak Test

Procedure for leak testing the refrigerant system for integrity.

System Evacuation and Dehydration

Methods for evacuating and dehydrating the refrigerant system.

System Charging Process

Initial Refrigerant Charge

Adding the preliminary refrigerant charge to the system.

Branch Circuit Energization

Steps for energizing the unit's branch circuit.

Unit Start-Up Sequence

Procedures for initiating unit and compressor operation.

Unit Service Adjustments

Capacity Control Adjustment

Explanation and adjustment of capacity control unloaders.

Unit Physical Data Summary

Time Guard Circuit Functions

Control Circuit Reset Procedure

Compressor Motor Protection Details

Unit Safety Relief Mechanism

Winter Start Control Requirements

Liquid Line Pressurestat Installation

Defrost Thermostat Installation

Fan Adjustment Procedure

Compressor Lubrication Guide

Add or Remove Compressor Oil

Detailed steps for managing compressor oil levels.