Carrier 24ABR318A0030010 User Manual A/C UNIT Manuals And Guides L0610772

CARRIER Air conditioner/heat pump(outside unit) Manual L0610772 CARRIER Air conditioner/heat pump(outside unit) Owner's Manual, CARRIER Air conditioner/heat pump(outside unit) installation guides

User Manual: Carrier 24ABR318A0030010 24ABR318A0030010 CARRIER A/C UNIT - Manuals and Guides View the owners manual for your CARRIER A/C UNIT #24ABR318A0030010. Home:Heating & Cooling Parts:Carrier Parts:Carrier A/C UNIT Manual

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Installation

Instructions

TABLE

OF CONTENTS
PAGE

SAFETY

CONSIDERATIONS

INSTALLATION

.......................

INSTALLATION

Equipment

Check

Install on Solid Pad ......................

Step 3 -

Clearance

Requirements

Step 4 -

Operating

Ambient

Step 5 -

Install TXV

.........................

Step 6 -

Make Piping

Connections

Step 7 -

Make Electrical

Step 8 -

Compressor

Step 9-

Install

NOTE:
Read
installation.

the entire

dense

coil

instruction

guard

option

manual

before

starting

the

& Jobsite

...............

..................

......................

Crankcase

AND MAINTENANCE

..............
............

Heater

Accessories

...........................
Charge

3 - 4

Connections

Electrical

Step 12 - Final Checks

with

3 - 10

Step 2 -

CARE

*Shown

Step 1 -

Step 11 - Check

A05341

.............

..............................

Step 10 - Start-Up

Fig, 1 - 24ABR*

RECOMMENDATIONS

.........................
..........................
......................

.............
..............

4 - 7
7 - 8
8
8
8 - 9
10
10
10

SAFETY
CONSIDERATIONS
Improperinstallation,adjustment,
alteration,service,
maintenance,
orusecancause
explosion,
fire.electrical
shock,
or
otherconditions
whichmaycause
death,
personal
injury,or
property
damage.
Consult
aqualified
installer,
service
agency,
or
yourdistributor
or branch
forinformation
or assistance.
The
qualified
installer
oragency
mustusefactory-authorized
kitsor
accessories
when
modifying
thisproduct.
Refer
totheindividual
instructions
packaged
withthekitsoraccessories
when
installing.
Follow
allsafety
codes.
Wear
safety
glasses,
protective
clothing,
andworkgloves.
Usequenching
clothforbrazing
operations.
Havefire extinguisher
available.
Readtheseinstructions
thoroughly
andfollowallwarnings
or cautions
included
in
literature
andattached
totheunit.Consult
localbuilding
codes
andNational
Electrical
Code
(NEC)
forspecial
requirements.
Recognize
safety
information.
Thisisthesafety-alert
symbol
Z_S
When
youseethissymbol
ontheunitandin instructions
or
manuals,
bealerttothepotential
forpersonal
injury.Understand
these
signalwords;DANGER.
WARNING,
andCAUTION.
These
wordsareused
withthesafety-alert
symbol.
DANGER
identifies
themostserious
hazards
whichwillresultin severe
personal
injuryor death.
WARNING
signifies
hazards
which
couldresultinpersonal
injuryordeath.
CAUTION
is used
to
identify
unsafe
practices
whichwouldresult
in minorpersonal
injuryor product
andproperty
damage.
NOTEis usedto
highlight
suggestions
whichwillresult
inenhanced
installation,
reliability,
oroperation.

INSTALLATION
RECOMMENDATIONS
NOTE:Insome
cases
noise
inthelivingarea
hasbeen
traced
to
gaspulsations
fromimproper
installation
ofequipment.
1.Locate
unitaway
fromwindows,
patios,
decks,
etc.where
unitoperation
sound
maydisturb
customer.
2.Ensurethatvaporandliquidtubediameters
are
appropriate
forunitcapacity.
3.Runrefrigerant
tubes
asdirectly
aspossible
byavoiding
unnecessary
turns
andbends.
4.Leave
some
slackbetween
structure
andunittoabsorb
vibration.
5.Whenpassing
refrigerant
tubesthrough
thewall,seal
opening
withRTVorotherpliable
silicon-based
caulk.
(See
Fig.2.)
6.Avoiddirect
tubingcontact
withwater
pipes,
ductwork,
floorjoists,
wallstuds,
floors,
andwalls.
7.Donotsuspend
refrigerant
tubingfromjoistsandstuds
witha rigidwireor strap
whichcomes
indirect
contact
withtubing.(See
Fig.2.)
8.Ensure
thattubinginsulation
ispliableandcompletely
surrounds
vapor
tube.
9.When
necessary,
usehanger
straps
whichare1 in.wide
andconform
toshape
oftubing
insulation.
(See
Fig.2.)
10.Isolate
hanger
straps
frominsulation
by usingmetal
sleeves
benttoconform
toshape
ofinsulation.
NOTE: Avoid contact between tubing and structure

OUTDOORWALL-,NDOORWAL 7

ELECTRICAL
SHOCK
HAZARD
Failure
tofollowthiswarning
couldresult
inpersonal
injuryordeath.
Before
installing,
modifying,
orservicing
system,
main
electrical
disconnect
switchmustbe in theOFF
position.
There
maybemore
than1disconnect
switch.
Lockoutandtagswitch
withasuitable
warning
label.

SU LATION___

VAPOR TUBE

THROUGH THE WALL

_,..._JOIST

HANGER STRAP
(AROUND VAPOR
TUBE ONLY)

_,/_

---_1

1" MIN.

I_--

INSULATION

LIQUID TUBE

SUSPENSION

A94026

Fig, 2 Outdoor

unit

contains

Piping

system

Installation

refrigerant

charge

for operation

with ARI rated indoor
unit when connected
by 15 ft. of
field-supplied
or factory
accessory
tubing.
For proper
unit
operation,
check refrigerant
charge using charging
information
located on control
of this instruction.

box cover and/or

in the Check

Charge

section

IMPORTANT:
Maximum
liquid-line
size is 3/8-in.
residential applications
including long line.

OD for all

IMPORTANT:

liquid-line

filter drier.
Digest for

Always
If replacing
appropriate

install the factory-supplied

the filter drier, refer to Product
part number.
Obtain replacement

driers from your distributor

or branch.

Data
filter

INSTALLATION
STEP

1 --Check

UNPACK

Equipment

and Job

Site

The

4 --Operating
minimum

Ambient

outdoor

operating

55°F. and the maximum
mode is 125°F.

UNIT

Move to final location.
unit.
Inspect

STEP

Remove

carton

taking

care not to damage

STEP

5 --Install

NOTE:

Equipment

outdoor

ambient

in cooling

mode

operating

ambient

in cooling

TXV

Applies

to non-TXV

factory

installed

Check

rating plate to be sure unit matches

STEP

2 --Install

The thermostatic
expansion
valve is specifically
operate with R-22. Do not use a Puron®
TXV.

If conditions

on a Solid,

Level Mounting

or local codes require

Pad

the unit be attached

to pad. tie

down bolts should be used and fastened
through
knockouts
provided in unit base pan. Refer to unit mounting
pattern in Fig.
3 to determine

base pan size and knockout

For hurricane

tie downs,

PE (Professional
authorities.
On rooftop

contact

Engineer)

applications,

mount

Consult
Roof

local codes

mounted

local distributor

for details

if required

on level platform

units exposed

rooftop
to winds

local

or frame. Place

applications.
may require

baffles.

Guideline
and Service
Manual
Air Conditioners
and Heat Pumps for

NOTE:

level

compressor

must

manufacturer

UNIT

.+2° (-+3/8 in./ft.)

per

device with an R-22

TXV.
designed
to
An existing

be replaced with a factory-approved
TXV
for R-22.
Refer to Product Data Sheet for

TXV kit number.

OPERATION

HAZARD

All indoor
off R-22

coil units must be installed
TXV metering

mounted

factory

installed,

as close to the indoor

upright
Valve

If not

position.
is more

down.

in the liquid

Installing

the TXV

coil as possible

mounting

susceptible

is facing

installed

Avoid

with a hard shut

device.
should

the inlet tube vertically

to malfunction

down.

due to debris

A factory-approved

and in a vertical,

filter

drier

if inlet
must

line.

TXV in Place of Piston

Requirements
1. Pump system

When installing,
allow sufficient
space for airflow
clearance,
wiring, refrigerant piping, and service. Allow 30-in. clearance to
service end of unit and 48 in. above unit. For proper airflow, a
6-in. clearance on 1 side of unit and 12 in. on all remaining sides
must be maintained.
Maintain a distance of 24 in. between units.
Position so water, snow, or ice from roof or eaves cannot fall
directly on unit.
3/8-in.

the fixed orifice

Failure to follow this caution may result in equipment
damage or improper operation.

tube
to within

specifications.

STEP 3 --Clearance

the appropriate

IMPORTANT:
wind

Consult
the Application
Residential
Split System
wind baffle construction.
Unit

Puron®
TXV must
specifically
designed

and replace

and

wall and isolate unit and tubing set
supporting
members
to adequately
transmission
of vibration
to building.

governing

TXV expansion

units

coil without

hole location.

certification,

unit above a load-bearing
from structure.
Arrange
support unit and minimize

TXV. remove

indoor

File claim with shipping company prior to installation
if shipment
is damaged or incomplete.
Locate unit rating plate on unit corner
panel. It contains
information
needed to properly
install unit.

R-22

and approved

TXV

If installing

job specifications.

a rated

and Puron

only.

or Puron®

3. Remove
and discard
Teflon seal is in place.
4. Reinstall
NOTE:

Dia. Tiedown

down to 2 psig and recover

refrigerant.

2. Remove hex nut from piston body. Use backup
fan coils.

hex nut. Finger

If the piston

not function

factory-installed

tighten

is not removed

wrench

piston.

sure

TXV

will

nut plus 1/2 turn.
from the body,

properly.

EQUIPMENT

DAMAGE

HAZARD

Failure to follow this caution may result in equipment
damage or improper operation.
Use a brazing shield and wrap
use heat sink material.
5. Install

TXV

indoor

TXV with wet cloth or
coil

liquid

line.

Sweat

swivel

adapter to inlet of indoor coil and attach to TXV outlet.
Use backup wrench to avoid damage to tubing or valve.
Sweat inlet of TXV. marked "IN" to liquid
excessive heat which could damage valve.

View From Top

UNIT

BASE

PAN

TIEDOWN

DIMENSIONS
26 X 26
31

1/2 X 31

1/2

35 X 35

KNOCKOUT

LOCATIONS

6. Install

9 1/S

4 7/16

21 1/4

9 1/8

6 9/16

24 11/16

9 1/g

6 9/16

28 7/16

On rooftop
surface.

Tiedown

applications,

locate

Knockout
unit

7. Connect
on vapor
8. Attach

Locations

at least

6 in. above

elbow with equalizer

adapter

to suction

tube

of line set and suction connection
to indoor coil. Adapter
has a 1/4-in. male connector for attaching equalizer tube.

A05177

Fig, 3 -

vapor

line. Avoid

roof

using

equalizer
TXV

clamps

bulb

to horizontal

provided.

insulation
tape.
sensing bulb.
9. Proceed

tube of TXV to 1/4-in.

equalizer

fitting

line adapter.

See

with remainder

Insulate
Fig.

4 for

section
bulb

of suction

line

with field-supplied

correct

of unit installation.

positioning

_10

STEP

O'CLOCK

6 --Make

Piping

Connections

2 O'CLOCK 7
__

SENSING

BULB
PERSONAL
HAZARD

INJURY

AND ENVIRONMENTAL

TRAP
SUCTION

Failure to follow
injury or death.

TUBE
8 O'CLOCK

could

result in personal

Relieve
pressure
and recover all refrigerant
before
system repair or final unit disposal.
Use all service
ports and open all flow-control
devices, including
solenoid valves.

4 O'CLOCK

7/8 IN, OD & SMALLER

this warning

LARGER THAN 7/8 IN. OD
A81032

Fig, 4 -

Replacing

Position

TXV on Puron

1. Pump

system down

2. Remove
cabinet.

coil access

3. Remove

TXV

of Sensing

Indoor

Bulb

Coil

to 2 psig and recover
panel

support

and fitting

clamp

using

UNIT

refrigerant.

panel from

a 5/16-in.

front of

nut driver.

Save the clamp.
4. Remove
Puron TXV
connections
to prevent
5. Using wire cutters,
tube inside cabinet.
6. Remove

using a backup
wrench
damage to tubing.

cut equalizer

bulb from vapor

tube off flush

suction

Route

line connection

fitting panel around

tube of R-22

barrier

TXV through

in fitting panel prior to replacing

TXV

support

clamp (removed

bulb clamps (nylon or copper).
positioning
of sensing bulb.

(large
place.

equalizer
hole)

tube through

in fitting

panel

See Fig.

suction

in same
supplied

4 for correct

connection

and install

fitting

12. Sweat inlet of TXV, marked "IN" to liquid
excessive heat which could damage valve.

opening
panel

line. Avoid

13. Install vapor elbow with equalizer adapter to vapor line of
line set and vapor connection to indoor coil. Adapter has
a 1/4-in. male connector for attaching equalizer tube.
14. Connect equalizer tube of TXV to 1/4-in. equalizer fitting
on vapor line adapter.
Use backup
wrench to prevent
damage
15. Proceed

to equalizer

fitting.

with remainder

result

in equipment

UNIT

DAMAGE

Failure
damage

HAZARD

to follow this caution
or improper operation.
damage

• Use a brazing

to unit

may

result

or service

in equipnmnt

valves,

observe

the

shield

• Wrap service valves

with wet cloth or use a heat sink

material.

in item 3).

10. Attach TXV bulb to vapor tube inside cabinet,
location as original was when removed,
using

11. Route

may

If ANY refrigerant tubing is buried, provide a 6-in. vertical
rise at service valve. Refrigerant
tubing lengths up to 36-in.
may be buried without further special consideration.
Do not
bury lines more than 36-in.

To prevent
following:

tubing.

8. Install TXV with 3/S-in. copper tubing through small hole
in service panel. Use wrench and backup wrench, to avoid
damage to tubing or valve, to attach TXV to distributor.
9. Reinstall

to follow
this caution
or improper operation.

tube inside cabinet.

the equalizer
opening

Failure
damage

HAZARD

with vapor

7. Braze equalizer stub-tube dosed. Use protective
necessary to prevent damage to drain pan.
IMPORTANT:

flare

DAMAGE

of unit installation.

Outdoor
accessory
tubing
shown

units may be connected
to indoor
section
tubing
package
or field-supplied
refrigerant

using
grade

of correct size and condition.
Rated tubing diameters
in Table 1 are recommended
up to 80 ft.
See Product

Data for acceptable
alternate vapor
diameters
and associated
capacity
losses.
For tubing
requirements
beyond
80 ft.,
substantial capacity and performance
losses can occur. Following
the recommendations
in the Longline Guideline
will reduce these
losses. Refer to Table 1 for field tubing diameters. Refer to Table
2 for accessory
There

requirements.

are no buried-line

applications

greater

than 36-in.

allowed.

If refrigerant tubes or indoor coil are exposed to atmosphere,
must be evacuated to 500 microns to eliminate contamination
moisture

in the system.

Outdoor

Unit Connected

OuMoor

unit

contains

to Factolw
correct

operation
with factory approved
connected by 15 ft. of field-supplied
and factory supplied
filter drier.
maximum

service

system

Indoor

refrigerant

Unit

charge

for

ARI rated indoor unit when
or factory-accessory
tubing,
Check refrigerant
charge for

efficiency.

Refrigerant
Connect

Approved

they
and

Tubing
vapor

valves

Connection

and liquid

tubes

Outdoor
to fittings

(see Table 1.) Use refrigerant

on vapor

and liquid

grade tubing

Sweat

Connection

Use refrigeration

grade

tubing.

Service

valves

factory and ready for brazing. After wrapping
a wet cloth, braze sweat connections
using

are closed

from

service valve with
industry
accepted

methods
and
materials.
Consult
local
code
requirements.
Refrigerant tubing and indoor coil are now ready for leak testing.
UNIT

DAMAGE

HAZARD

This check should

include

all field and factory joints.

Failure to follow this caution may result in equipment
damage or improper operation.
Service
material

valves must be wrapped
in a heat-sinking
such as a wet cloth while brazing.

Table 1--Refrigerant

Connections and Recommended Liquid and Vapor Tube Diameters (In.)
R&TED VAPOR
LIQUID

(up to 80 ft.*)

UNIT SIZE
Connection
Diameter

Tube
Diameter

Connection
Diameter

Tube
Diameter

018, 024

3/8

5/8

030, 036

3/8

3/4

042, 048

3/8

7/8

060

3/8

7/8

1 1/8

Notes:
1. Tube diameters are for total equivalent lengths up to 80 ft..
2. Do not appty capillary tube or fixed orifice indoor coils to these units.
* For Tubing Set lengths between 80 and 200 ft. horizontal
Conditioners and Heat Pumps using R-22

or 20 ft. vertical differential

Table 2--Accessory
REQUIRED
Accessory
Crankcase
Evaporator

Heater

Freeze Thermostat

Winter

Start Control

Accumulator
Compressor

Start Assist
and Relay

Capacitor

Motor Master® Control
or
Low-ambient
Pressure Switch
Support

Feet

Liquid Line Solenoid
Ball Bearing

FOR LOW-AMBI-

ENT APPLICATIONS
(Below 55 °F)

Fan Motor

Length), refer to the Longline

Guideline-

Air

Usage
REQUIRED

FOR LONG LINE

APPLICATIONS*

(Over 80 Ft.)

REQUIRED

Yes

Yes t

Yes

FOR SEA

COAST APPLICATIONS
(Within 2 miles)

Yes

Recommended
Valve

(250 ft,Totat Equivalent

Recommended

See Long- Line Application
Guideline

Yesn:

For Tubing Set lengthsbetween 80 and 200 ft, horizontal or 20 ft. vertical differential 250 ft.Total Equivalent Length), refer to the Longline Guideline - Air Conditioners and Heat Pumps using R-22
SRequired for low-ambient controller (full modulation feature) and Motor Master, control only.
tOniy when low pressure switch is used.

Install Liquid-Line

UNIT
Failure
damage

DAMAGE

Filter

Drier Indoor

HAZARD

to follow this caution
or improper operation.

Installation

of filter

Evacuate

drier

Refrigerant

UNIT DAMAGE
may result

in liquid

in equipment

line is required.

tube to the indoor

4. Connect

5-in.
coil.

coil.

HAZARD
result

Never use the system

compressor

as a vacuum

indoor

should

tubes

and

coil

used if the procedure
outlined
below
break a vacuum with dry nitrogen.
liquid

and braze liquid refrigerant

Coil

in equipment

using the recommended
deep vacuum
microns.
The alternate
triple evacuation

2. Wrap filter drier with damp cloth.
3. Braze filter drier to above
must point towards indoor

and Indoor

Failure to follow this caution may
damage or improper operation.

Refrigerant
Refer to Fig. 5 and install filter drier as follows:
1. Braze 5-in. liquid

Tubing

tube.

Flow arrow

tube to the filter drier.

Deep Vacuum

pump.

evacuated

method
method

of 500
may be

is followed.

Always

Method

The deep
vacuum
method
requires
a vacuum
pump
capable of pulling a vacuum of 500 microns and a vacuum
gage capable of accurately
measuring
this vacuum depth.
The deep vacuum
method
is the most positive way of
assuring a system is free of air and liquid water. (See Fig. 6)

LEAK IN
SYSTEM

VACUUM TIGHT
TOO WET
TIGHT
DRY SYSTEM

A05178

Fig. 5 - Liquid

Line

Filter Drier
0

MINUTES
A95424

Fig. 6 UNIT DAMAGE

Triple

HAZARD

Failure to follow this caution may
damage
or improper operation.

result

in equipment

Filter drier must be wrapped
in a heat-sinking
such as a wet cloth while brazing.

Evacuation

The triple
vacuum
mercury

material

water.

Deep Vacuum

Method

evacuation

method

pump is only capable
vacuum and system

should

system

pump
to
minutes.
2. Close

continue

service

3. Connect

down

be used

operating

for

cylinder

and regulator

pressure

and

additional

and shut off vacuum

and open until system

when

as follows:

to 28 in. of mercury

valves

a nitrogen

only

of pumping
down to 28 in. of
does not contain any liquid

Refer to Fig. 7 and proceed

1. Pump

Graph

allow
15

pump.
to system

is 2 psig.

4. Close service valve and allow system to stand for 1 hr.
During this time, dry nitrogen will be able to diffuse
throughout
5. Repeat

the system

this procedure

absorbing

moisture.

as indicated

in Fig. 7. System

will then be free of any contaminants

and water vapor.

I EVACUATE

[BREAK VACUUM WITH DRY NITROGEN

ELECTRICAL

SHOCK

Failure to follow
injury or death.

IEVACUATE
I

IEVACUATE
I
TIGHT,

FOR

(IF

IT HOLDS

DRY

Connect

Ground

Connect

ground

safety. Connect

SYSTEM

could

result

in personal

and Power Wires
wire to ground
power wiring

connection

to contactor

in control

as shown

box for

in Fig. 8.

DISCONNECT_q
PER N.E.C. AND/OR_q
LOCAL CODES

VACUUM)

DEEP

warning

The unit cabinet must have an uninterrupted
or unbroken
ground to minimize
personal injury if an electrical fault
should occur. The ground may consist of electrical wire or
metal conduit when installed in accordance
with existing
electrical codes.

[BREAK VACUUM WITH DRY NITROGEN

CHECK

this

HAZARD

]

[ CHARGE SYSTEM

]

Fig.

Method

CONTACTOR

A95425

Final

Tubing

7 - THple

FIELD POWER
WIRING

Check

IMPORTANT:

Check

indoor

and outdoor

tubes

are not rubbing

attention

to be certain

7 --Make

factory

unit has not shifted during
against

to feeder

tubes are secure
STEP

Evacuation

tubing

on both

shipment.

Ensure

each other or any sheet metal. Pay

tubes,

making

sure wire ties on feeder

BLUE

3 PHASE ONLY
FIELD GROUND

WIRING

GROUNDD
LUG

and tight.
Electrical

Connections

A94025

Fig.

8 - Line Connections

CONTACTOR

ELECTRICAL

SHOCK

Failure to follow
injury or death.

Be sure field wiring

could

to unit with

complies

24VAC

COM

HAZARD

this warning

Do not supply power
box cover removed.

(.)

result

in personal

compressor

terminal

with local and national

fire, safety,

and electrical codes, and voltage to system is within limits shown
on unit rating plate. Contact local power company for correction
of improper
voltage.
See
circuit protection
device.

unit

rating

plate

for recommended
ON:OK

OFF;NO
FLASH;PHASE

24VAC
PROBLEM

NOTE:
Operation
of unit on improper line voltage constitutes
abuse and could affect unit reliability. See unit rating plate. Do
not install unit
below permissible
NOTE:
unit.

Install
to handle

sight from
of NEC.
Route
Remove

wire only

branch
unit

and readily

Ground

where voltage

may fluctuate

circuit

starting

between
disconnect

current.

accessible

disconnect

switch

of adequate

Locate

0 0

from unit, per Section

per

AO0010

Fig, 9 - 3-Phase Monitor Control
(Applies to 3-Phase Units Only)

within
440-14

Table 3--3-Phase

Monitor LED Indicators

LED
and Power Wiles

through

power

wiring

Extend

hole provided

and

size

disconnect

access panel to gain access to unit wiring.

from disconnect
unit control box.

above

limits.

Use copper

NOTE:
NEC

in system

L_2

wires

and into

OFF
FLASHING
ON

STATUS
No call for compressor
tion
Reversed
Normal

phase

opera-

STEP 10 --Start-Up

UNIT

DAMAGE

HAZARD
UNIT

Failure to follow this caution may result in equipment
damage or improper operation.
Ensure

compressor

rotation

3-phase scroll compressors
sensitive.

•

A flash LED on phase monitor
reverse rotation.

•

Disconnect

Route

Control
24-v

• Do not operate

to be energized.

rotation,

through

control

wiring

grommet

and

the control

voltage

wire to avoid excessive

wires,

All wiring must be NEC
incoming power leads.
Use

furnace

for control

NOTE:

Use

minimum

40va

power

Final

Wiring

coil

accessory

minimum.

24v

accessories

may

exceed

Determine

total

transfommr

the transformer

Check

capacity

factory

wiring

Crankcase

with a crankcase

of 24 hr before

only, set thermostat
outdoor unit.

to OFF

heater is required

Check

wire routing

Heater

electrical

if refrigerant

80 ft. Refer to the Application
Guideline
Longline Section-Residential
Split-System

tubing

to heater a

power

to heater

disconnect

is longer

9 --Install

Electrical

INJURY

to follow

accessories

the

individual

when installing.

• Front seating

Correct

by reversing

may result in personal

service valves

injury.

clothing,
and gloves
the following:

are equipped

when

with Schrader

valves.

HAZARD
this caution

packaged

with

kits

may

result

in environmental

Federal regulations
require that you do not vent
the atmosphere.
Recover
during system repair
disposal.
these steps to properl_

start

1. After system is evacuated,
service valves.

refrigerant to
or final unit

up s_stem:
fully

open

2. Unit is shipped with valve stem(s)
and caps installed.
Replace
stem

liquid

and vapor

front seated (closed)
caps after system
is

opened to refrigerant flow. Replace caps finger-tight
tighten with wrench an additional 1/12 turn.
3. Close

electrical

4. Set room

Accessories
instructions

draw.

HAZARD

this caution

disconnects

thermostat

5. Set room

thermostat

AUTO

mode,

Check

system

Turn on
energized.

power

indoor

and

system.

temperature.

Be sure set

temperature.

to COOL

refrigerant

of Operation
to

ambient

as desired.

Sequence

to energize

at desired

point is below indoor
Refer

noise levels, equalized

current

Wear safety glasses, protective
handling refrigerant and observe

than

and Service Manual
Air Conditioners
and

Heat Pumps.
STEP

PERSONAL

Follow
power

unit. To furnish

and close

will cause reverse

L1 and L2 on contactor.

Failure to follow
damage.

sheet metal, etc.

heater, furnish

starting

phasing

or split the load

and field wire connections

with tubing,

incorrect

in elevated

ENVIRONMENTAL

properly.

pressure.

the

as required.

are secured

8 --Compressor

When equipped

A crankcase

from

requirement.

transformer

terminations

minimum

transformer,

24v/40va

to ensure wires are not in contact
STEP

be separated

Check

IMPORTANT:
to ensure

power,

available

and increase

with an accessory

fan

or at negative

may be hot.

and reduced

power connection

Failure

1 and must

the

color-coded

drop.

Class

transformer,

transfomaer

use No. 16 AWG

voltage

observe

Instructions

Use No. 18 AWG color-coded,
insulated (35°C minimum) wire.
If thermostat is located more than 100 ft. from unit, as measured
along

injury,

personal

system with refrigerant.

resulting

pressures

connect leads to control wiring. Refer to Installation
packaged with thermostat (See Fig. 10)

HAZARD

or personal

unit in a vacuum

• In 3 phase applications,

leads on unit contactor.

wires

damage

• Dome temperatures

Wiring

control

compressor

• Do not overcharge

indicates

power to unit and interchange

fleld-wirin_

Connect

To prevent
following:

are rotation

(See Fig. 9 and Table 3)

This will not allow contractor

AND SAFETY

Failure to follow this caution may result in minor
injury, equipment damage or improper operation.

is correct.

•

OPERATION

and fan control

Operate

unit

for

to ON or
15 minutes.

charge.

and

outdoor

units.

Transformer

On a call for cooling, thermostat makes circuits R-Y and R-G.
Circuit R-Y energizes contactor, starting outdoor fan motor and
compressor
circuit. R-G energizes
indoor
unit blower
relay,
starting
When

indoor blower
thermostat

contactor

and blower

If indoor unit
indoor blower
system

motor on high speed.

is satisfied,

its contacts

relay. Compressor

open.

and motors

de-energizing
stop.

is equipped
with a time-delay
relay circuit, the
will run an additional
90 seconds
to increase

efficiency.

A/C

Typical

THERMOSTAT

FURNACE

24 MAC

HOT

E_--

24 MAC

COM

[_"--

A/C
THERMOSTAT

AIR

AIR
CONDITIONER

24 MAC HOT

"--_

24 VAO OOM
--

Typical
FAN COIL

CONDITIONER

" ----E_

HEATSTAGE1
r-_-qi i D
OOOLSTAGE1
Fq-- "---E]-,NOOOREAN
E}---"--D

10
v

HEAT

STAGE

COOL

STAGE

INDOOR

FAN

Eli--

a_D
A02326

LEGEND
24-V FACTORY WIRING
24-V FIELD WIRING
FIELD SPLICE CONNECTION

CONTACTOR

A97368

Fig.
(See Thermostat

10 - Generic

Installation

Wiring

Instructions

Diagrams

for specific

unit

combinations)

STEP

11 --Check

Factory

charge

Table 4--Required

Charge
and

charging

method

are

shown

unit

Liquid
Pressure
at Service
Valve

information
plate. To check charge, follow the procedure
below
and the subcooling
temperature
required
as shown on charging
table on unit.

Subcooling Temperature (°F)

Required Subcooling Temperature

(°F)

(PSIG)

134

141

148

156

163

171

179

To calculate additional charge required for a 25-ft. line set:
25 ft. - 15 ft. = 10 ft. X 0.6 oz/ft. = 6 oz. of additional charge.

187

196

Cooling

205

nmthod.

214

101

before

223

104

233

107

102

243

110

105

100

253

113

108

103

3. Measure liquid line temperature
by attaching an accurate
thermistor
type or electronic
thermometer
to liquid line
near outdoor coil.

264

116

111

106

101

274

119

114

109

104

285

122

117

112

107

4. Refer
to unit
temperature.

297

125

120

115

110

309

128

123

118

113

321

131

126

121

116

331

134

129

124

119

346

137

132

127

122

359

140

135

130

125

NOTE:

If subcooling

charging

conditions

charge must be weighed

in accordance

oz/ft,

line above

of 3/8-in.

Favorable

liquid

conditions

fall within

chart on the outdoor
NOTE:

with unit rating plate, -+0.6

or below

15 ft., respectively.

the ranges given

on the charging

unit plate.

In longline

special charging

are not favorable,

applications,

see Application

Guideline

for

requirements.

EXAMPLE:

On D Procedure

This system

requires

1. Operate
charge.

charging by the subcooling

unit

2. Measure

a minimum

liquid

accurate

of 10 minutes

service

valve

gage to service

pressure

attaching

port.

rating

plate

for

required

5. Refer to Table 3. Find the point where
temperature

checking

intersects

measured

subcooling

required

liquid

subcooling

service

valve

pressure.
6. To obtain

required

subcooling

temperature

at a specific

liquid
line
pressure,
add refrigerant
if liquid
line
temperature
is higher than indicated or reclaim refrigerant
if temperature
STEP

12 --Final

IMPORTANT:

is lower. Allow

that

edges

that all wiring

adding
covers.

panels

3. Tighten

is routed
prevent

and tubing

and covers.

service

valve

away

from

tubing

and

rub-through

wire

is secure

Securely

AND MAINTENANCE

For continuing
high performance
and to minimize
possible
equipment
failure, periodic maintenance
must be performed
on
this equipment.

job, be sure to do the following:

all wiring

sheet
metal
pinching.
2. Ensure

(;ARE

of-+3 °F.

Checks
Before leaving

1. Ensure

a tolerance

fasten

Frequency of maintenance
may vary depending upon geographic
areas, such as coastal applications.
See Owner's
Manual
for
information.

in unit before
all panels

stem caps to 1/12-turn

and

past finger

tight.

Manufacturer

2005

4. Leave
Owner's
Manual
with
owner.
Explain
operation and periodic maintenance
requirements
in manual.

system
outlined

5. Fill out
customer

place

Calder

Crop

rese_'es

the

tight

Dealer
file.

7310

Installation

Monis

to change,

St •

any

Checklist

Indianapolis,

time.

specifications

and

46231

and

Printed

designs

without

notice

and

without

obligations.

in USA

edition

date:

Catalo_ No: 24ABR-2SI
Replaces:

_4ABR

1SI

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Carrier 24ABR318A0030010 User Manual A/C UNIT Manuals And Guides L0610772

CARRIER Air conditioner/heat pump(outside unit) Manual L0610772 CARRIER Air conditioner/heat pump(outside unit) Owner's Manual, CARRIER Air conditioner/heat pump(outside unit) installation guides

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