Carrier 38TRA018 SERIES300 User Manual CONDENSING UNIT Manuals And Guides L0411016

CARRIER Air conditioner/heat pump(outside unit) Manual L0411016 CARRIER Air conditioner/heat pump(outside unit) Owner's Manual, CARRIER Air conditioner/heat pump(outside unit) installation guides

User Manual: Carrier 38TRA018 SERIES300 38TRA018 SERIES300 CARRIER CONDENSING UNIT - Manuals and Guides View the owners manual for your CARRIER CONDENSING UNIT #38TRA018SERIES300. Home:Heating & Cooling Parts:Carrier Parts:Carrier CONDENSING UNIT Manual

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38TRA
Air Conditioning Unit

HEATING & COOUNG

Visit www.carrier.cmn

Installation and Start-Up Instructions
NOTE:
Read
installation.
This symbol

the

entire

instruction

=-> indicates

a change

SAFETY
Improper
or

installation,

use

can

conditions

which

may cause

Consult

a qnalified

for information

agency

must

service

this product.

the kits or accessories

all safety

quenching
available.
warning

codes.

Read

these

safety

you

manuals,

see

or your

distributor

installer

kits

accessories

when

instructions

pack-

installing.
and work gloves.
Have

fire

thoroughly

to the unit.

Electrical

other

damage.

qualified

when

instructions

or property

The

operations.

attached

maintenance,

shock,

to the individual

Code

and

Consult

(NEC)

Use

extinguisher
follow

all

local

building

for special

reqnireA98516

information.

This is the safety-alert

this symbol

on the unit

be alert to the potential

Understand

the

agency,

Wear safety glasses

for brazing

codes and National
lilents.

When

Refer

cloth

or cautions

Recognize

injury

factory-authorized

aged with

service,

electrical

or assistance.

modifying

alteration,
fire,

personal

installer,

use

starting

CONSIDERATIONS

explosion,

branch

before

since the last issue.

adjustment,

cause

manual

these

signal

and

for personal

words;

symbol

z_ •

in instructions

or
5. When

injury.

DANGER,

WARNING,

which

personal
could

to identify

injury

result

death.

in personal

unsafe

practices

WARNING

injury

which

injury or product and property
suggestions
which will result

signifies

or death.

would

in minor

is used

6. Avoid

rigid

installing,

8. Ensure

9. When

modifying,

or servicing

be in the OFF

be more

than

with

a suitable

switch

cause personal

must

1 disconnect
warning

injury

In some cases,

gas pulsations

the unit

2. Ensure

that vapor

the capacity
3. Run

4. Leave

and liquid

shock

When

can

robes

directly

are appropriate

1.)

the structure

avoiding

and the unit to absorb

reserves the right to discontinue,
PC 101

Catalog No

533-80090

robing

fi'om joists

comes

in direct

insulation

is pliable

use hanger

the hanger

straps

floor

and studs with a
contact

with

and completely

which

of the tubing

straps

from

bent to conlbrm

the

sur-

are 1 in. wide

insulation.

(See

the insulation

to the shape

unit is connected

unit contains

refrigerant
box cover.

charge

system

and

Fig. 3.)

by using

metal

of the insulation.

to _actory-approved

refrigerant

charge

using

charging

Maxinmm

Always
an

information

liquid-line

including

indoor

unit,

for operation

with

install

existing

size is 3/8-in.

a liquid

field

coil or fan coil. Also, always
compressor

Form

or designs

38TRA-6Sl

replacements.

without notice
Pg 1

line

service

on burnout

for appropriate
part number.
distributor
or branch.

located

on control

O.D.

for all

long line.

evaporator

or change at any time, specifications
Printed in USA.

using

applications

IMPORTANT:
system

vibration.

Manufacturer

ductwork,

line.

to the shape

outdoor

residential

tunas and bends.

some slack between

with water pipes,

which

tubing

IMPORTANT:

as possible

the
(See

factory-approved
indoor unit of the same size when connected by
15 ft of field-supplied
tubing. For proper unit operation,
check

of equipment.

line diameters

(See Table

seal

caulk.

out and tag

l}om windows.

of the unit.

the wall,

silicon-based

and walls.

rel}igerant

necessary,

sleeves

outdoor

installation

contact

or strap

that

10. Isolate

noise in the living area has been traced to

away

refrigerant

unnecessary

Lock

Electrical

elecThere

RECOMMENDATIONS

fi'om improper

i. Locate

switch.
label.

main

position.

or death.

INSTALLATION
NOTE:

system,

lineset

the vapor

conform

switch

through

(See Fig. 3.)

rounds

trical disconnect
may

wire

tubing.

¥.,_ "EY!3;_II_r3

robes

or other pliable

wall studs, floors,

7. Do not suspend

or operation.

Before

direct

joists,

personal

damage. NOTE is used to highlight
in enhanced
installation,
reliability,

refrigerant

with RTV

38TRA

Fig. 3.)

hazards

CAUTION

result

passing

opening

and

CAUTION.
These words are used with the safety-alert
symbol.
DANGER
identifies the most serious hazards which will result in
severe

Fig. 1--Model

Obtain

filter

lineset

drier

and/or

any

indoor

use liquid line filter driers

Refer to Product
filter

driers

Data Digest

fi'om your

local

and without incurring obligations.
02-03

Replaces:

38TRA-5Sl

Table 1--Refrigerant
UNIT SIZE

Connections and Recommended

LIQUID
Diameter
Tube Diameter

Connection

Liquid and Va _or Tube Diameters (In.)

VAPOR
Diameter
Tube Diameter

VAPOR (LONG LINE)
Connection Diameter
Tube Diameter

018, 024

3/8

5/8

030, 036

3/8

3/4

7/8

042, 048
060

3/8
3/8

7/8
7/8

7/8
!-1/8

7/8

1-1/8

7/8

1-1/8

Notes: 1 Tube diameters are for lengths up to 50 ft. For tube sets over 50 ft horizontal and/or 20 ft vertical differential
2. Do not apply capilIary tube indoor coils to these units.

INSTALLATION
Step

l--Check

UNPACK

Equipment

UNIT

Move

care not to damage
INSPECT

to installation

unit

rating
job

on unit

If" conditions
down

Remove

claim

install

with

is damaged

service
unit.

on a Solid,

or local codes

bolts

panel.

shipping

taking

company

or incomplete.
It contains

Check

rating

plate

Level

Mounting

should

require

be used

Locate

information
to be sure unit

applications,

mount

Pad

the unit be attached

and

fastened

through

provided in unit base pan. Refer to unit mounting
Fig. 2 to determine
base pan size and knockout
On rooftop

carton

specifications.

Step 2--Install

tie

File

if shipment

plate

to properly

matches

to final location.

unit.

EQUIPMENT

prior
needed

and Job Site

to a pad,

Long-Line Application

GuideIine.

1 side of unit and 12 in. on all remaining
Maintain
a distance
of 24 in. between

sides must be maintained.
units. Position
so water,

snow,

fall directly

or ice from roof

On rooftop
surface.

or eaves

applications,

Step 4_Operating

locate

cannot
unit

at least

on unit.

6 in.

above

roof

Ambient

The mininmm outdoor operating ambient in cooling mode is 55°F,
and the maxinmm outdoor operating ambient in cooling mode is
125°F.
Step 5--Replace

Indoor

AccuRater

Piston,

if Required

knockouts

pattern shown in
hole location.

on level platform

consult Residential

3/4

or frame.

Place

Check

indoor

shown

on unit rating plate. If it does not match,

piston

with piston

outdoor

coil piston

to see if it matches

shipped

unit is con'ect

the required
replace

with this unit. The piston

for any approved

indoor

piston

indoor coil
shipped

with

coil combination.

unit above a load-bearing
wall and isolate unit and tubing set fi'om
structure. Arrange supporting
members to adequately
support unit
and minimize

transmission

codes

goveruing

Roof
wind

mounted
baffles.

of vibration

rooftop

to building.

Consult

local

applications.

units exposed to winds above 5 mph may require
Consult
Low-Ambient
Guideline
for wind baffle

Remove indoor coil piston if unit is to be installed on system
with a thermostatic expansion valve (TXV) metering device.

construction.
NOTE:

Unit

facturer

specifications.

must be level

Step a--Clearance
When

installing,

erant piping,

to within

±2 ° per compressor

Requirements

allow

sufficient

and service.

space for airflow,

Allow

30 in. clearance

unit and 48 in. above unit. For proper
3/8-1N
KNOCKOUTS

DIA

TIEDOWN

airflow,

wiring,
to service

refrigend of

a 6 in. clearance

(2) PLACES

."......,/ V o

,,',_t.:((
c. _

____OOTOOO
,.OOO
WA
WAL>.
L-CAULK ' r

HANGER STRAP-- N
(AROUND VAPOR

'>_!/_ql

,£\ _ 2 ,/2

THROUGH THE WALL

",>.:_

FROM

TOP

/?:>

I _

_f"---JOIST

N, --

()

_i
VIEW

fz_ L,QU,D
TUBE

SULATI

NOTE: Avoid contact between tubing and structure

--_

IN BASEPAN

manu-

VAPOR TUBE

8 3/16"

1"MIN.--,-I
Dimensions (In.)
UNIT BASE
PAN DIMENSIONS
22.5 X 27.5

TIEDOWN
A
2-13/!6

30.0 X 35.0

Fig. 2--Clearance

KNOCKOUT

LIQUID TUBE
LOCATIONS
B

SUSPENSION

6-15/16
9-3/4

Requirements

A94028

Fig. 3--Piping

Installation

Table 2--Accessory

ACCESSORY
Crankcase
Evaporator

Usage

REQUIRED FOR
LOW=AMBIENT
APPLICATIONS

REQUIRED FOR
LONG-LINE
APPLICATIONS*

REQUIRED FOR
SEA COAST
APPLICATIONS

(BELOW SS°F)
Yes

(OVER S0 FT)
Yes

(WITHIN 2 MILES)
No

Heater

Yes

Winter Start Control
Accumulator

Freeze Thermostat

YeMNo

No
No

Compressor
Start Assist
Capacitor and Relay
MotorMaster TM Control
or
Low-Ambient
Pressure Switch

Yes

Wind Baffle

See Low-Ambient

Coastal

Filter

Support

Feet

Instructions

No
Recommended

Solenoid Valve
or
Hard Shutoff TXV

Tubing Connections

outdoor
refrigerant

may

be buried

lengths

tubing

valve.

above

is buried,

Refrigerant

without

36 in., consult

provide

service

Service

for brazing.
the tubing

silver

local

fittings

(See Table

1.) Use

tubing.

and ready

using either

tubing

valves.

bearing

After

set can be brazed
or non-silver

code requirements.

and factory

valves

closed

from

the selwice

are

valve

to the service

valve

wrapping
bearing

Refrigerant

for leak testing.

This check

brazing

material.

tubing

and indoor

should

include

all

joints.

a 6 in. vertical

lengths

special

your

grade

Connect

and liquid

coil are now ready

tubing

further

TUBING

with a wet cloth,

field
If ANY refrigerant

CONNECTION

factory

Con-sult

r:l [ "_.lliilI.]_
rise at service

No
Guideline

unit vapor

SWEAT

Recommended
No

REFRIGERANT

Relieve pressure and recover all refi'igerant before system
repair or final unit disposal to avoid personal injury or death.
Use all service ports and open all flow-control devices,
including solenoid valves.

Yes

See Long-Line
Application
GuideIine

YeMt

*For tubing line sets between 50 and 175 ft, refer to Residential Split System Long-Line Application
tOnty when low-pressure switch is used
*Required for low-ambient controlIer (full modulation feature) and MotorMaster Control only

Step 6--Making

No
No

Liquid-Line

Ball Bearing Fan Motor

up to 36 in.

consideration.

For

local distributor.

g.,l[_
To prevent damage to unit or service valves observe the
following:
•Use a brazing shield.
•Wrap service valves with wet cloth or use a heat sink
material.
Outdoor
tubing

units may be connected
package

and condition.
capacity

or field-supplied
For tubing

and performance

mendations

will reduce

equivalent

line

section

refrigerant

requirements
losses

in the Residential

Guideline

to indoor

tubing

beyond

can occur.

Split System

Refer

to Table

of correct

Following
Long-Line

2 lbr

size

50 ft, substantial

these losses. Refer to Table

length.

using accessory

the recomApplication

1 for field tubing
accessory

require-

Step 7--Make

Electrical

Connections

Be sure field wiring

complies

and electrical

and voltage

codes,

with local

and national

to system

is within

fire, safety,
limits

on unit rating plate. Contact

local power

company

improper

voltage.

rating

for recommended

protection

device.

NOTE:
abuse

See unit

Operation

of unit

and could affect

install

unit

above

NOTE:
unit.

Use

NOTE:

Install

where

or below
copper

on improper

unit reliability.

in system

fluctuate

plate

wire

only

line voltage

circuit

constitutes

See unit rating plate. Do not

voltage

permissible

shown

for con'ection

or phase

imbalance

may

limits.

between

disconnect

switch

and

lIlents.

For buried-line
distributor.

applications

greater

than 36 in., consult

your

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

INDOOR
charge

connected
Check

they
and

in the system.

OUTDOOR
ant

local

/_'IT
LEX'IT

CONNECTED
Outdoor

for operation

TO FACTORY-APPROVED

unit contains
with

indoor

by 15 ft of field-supplied

refrigerant

charge

for maximum

correct
unit

system

of same

or factory-accessory
efficiency.

unit

refriger-

size

when
tubing.

starting

readily

branch

current.

accessible

circuit
Locate

of adequate

size per NEC to handle

disconnect

within

fi'om unit per Section

440-14

sight
of NEC.

from

and

Step lO--Start-Up

Theunitcabinet
musthaveanuninterrupted
or unbroken
ground
to minimize
personal
injuryif anelectrical
fault
should
occur.
Theground
mayconsist
ofelectrical
wireor
metalconduit
wheninstalled
in accordance
withexisting
electrical
codes.
Failure
tofollowthiswarning
canresult
inan
electrical
shock,
fire,ordeath.
ROUTE
panel

GROUND

and control

AND

wires from disconnect
into unit control box.
CONNECT
wire

wiring

WIRES

to gain access

through

power

M [_,121
To prevent

AND POWER

connection
to contactor

as shown

damage

or personal

• Do not overcharge

system

unit in a vacuum

• Do not disable

low-pressure

access

In scroll compressor

applications:

Extend

• Dome

may be hot.

and

WIRES

Connect

box

for safety.

ground
Connect

observe

temperatures

• In 3 phase

application,

resulting

or at negative

pressure.

switch

Remove

hole provided

injury,

with refrigerant.

• Do not operate

to unit wiring.

wiring

in control

compressor

the following:

rotation,

GROUND

to ground

power

POWER

box cover

and Check Charge

incorrect

in elevated

phasing

noise

will cause

levels,

sures and reduced current &aw. Correct
connection
L1 and L2 on contactor.

reverse

equalized

by reversing

prespower

in Fig. 4.

F:! [_'171
DISCONNECT
PER N. E. C. AND/OR
LOCAL CODES

To prevent personal injury wear safety glasses, protective
clothing, and gloves when handling refrigerant and observe
the following:
• Back seating service valves are not equipped with Schrader
valves. Fully back seat (counter clockwise) valve stem before
removing gage port cap.
• Front seating service valves are equipped with Schrader
valves.

CONTACTOR
FIELD POWER

]

_@o

WIRING

FIELD GROUND
WIRING

F,'][,_.T,wid[,]]]

GROUND
LUG

A91056

Fig. 4_Line

Do not vent refrigerant to atmosphere. Recover during system
repair or final unit disposal.

Connections
Follow

CONNECT
through

CONTROL

control

wiring.

WIRING

wiring

Route

grommet

and

24-v

connect

control

leads

wires

to control

i. Fully

the control
to avoid

All

wiring

incoming

voltage

excessive

must

for control

NOTE:
nmm

Use
40va

accessory

Class

color-coded

be separated

transformer,

or accessory

24v accessories
Determine

the transformer

3. Close

fi'om

capacity

ensure

terminations

ensure

wires

factory

Step 8--Compressor

may exceed

the miniload-

or split the load with an

and wire

properly.

Check

starting
When

Heater

to the

individual

when installing.

Accessories,

instructions

If Any

packaged

with

the

kit

system

and tighten

with

system.

temperature.

Be sure set point

at COOL and fan control
unit

OF OPERATION
Transformer

circuit.

the indoor

at ON or AUTO

fbr 15 minutes.

Check

system

Turn

to indoor

the thermostat
contactor,

blower

the thermostat
and blower

If indoor

unit

motor

is satisfied,
relay.

is equipped

on power

and

is energized.

R-G energizes

contactor

indoor blower

and

is opened

temperature.

Operate

R-Y energizes

etc.

after

valves.

(closed)

charge.

On a call for cooling,

wire

routing

robe service

fi'ont seated

to energize

at desired

ambient

as desired.

units.

compressor

A crankcase heater is required if the refrigerant tubing is longer
than 50 ft. Refer to Residential Split System Long-Line Application Guideline.

accessory

outdoor

When equipped with a crankcase heater, furnish power to heater a
minimum of 24 hrs before starting unit. To furnish power to heater
only, set thermostat to OFF position and close electrical disconnect
to outdoor unit.

Refer

thermostat

SEQUENCE

connections

sheet metal,

stem caps

disconnects

indoor

refrigerant

total transformer

with tubing,

Crankcase

Electrical

mode,

Circuit

wiring

are secured

are not in contact

Step 9--Install

electrical

is below

trans-

as required.

Check

Replace

and vapor
stem(s)

refrigerant
flow. Replace caps finger-tight
wrench an additional
1/12 ram.

minimum.

requirement.

transformer

installed.

4. Set room

1 and must

24vi40va

of available

IMPORTANT:

16 AWG

liquid

with valve

5. Set room thermostat
fan-coil

power,

power

ing and increase

use No.
drop.

leads.

Use ff_rnaee transfbnner,
former

wires,
voltage

be NEC

power

back seat (open)

caps

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

steps to start up the system:

2. Unit is shipped

(See Fig. 5.)

wires

these

makes
starting

the indoor

with

R-Y and R-G.
_an motor

unit blower

and
relay,

on high speed.
its contacts

Compressor

will run an additional

circuits
outdoor

open, de-energizing

and motors

a time-delay
90 seconds

relay

stop.
circuit,

to increase

the

system

efficiency.
Step

11--Check

Charge

UNIT CHARGE
Factory
Adjust charge by following
located on unit.

charge is shown on unit rating plate.
procedure
shown on charging
tables

NOTE: If superheat or subcooling charging conditions are not
favorable, charge must be weighed in accordance with unit rating
plate ± 0.6 ozifi of 3/8-in. liquid line above or below 15 ft
respectively.

A/C
THERMOSTAT

#JC
THERMOSTAT

AIR
CONDITIONER

Typical
FURNACE

24VAOHOT
E]------O

24 VAC HOT

24VACCOM

24 VAC COM

HEATSTAGE1
....--E]

HEAT STAGE 1

COOLSTAGEI
Fq ....--12>

COOL STAGE 1

,NDOORFAN

INDOOR FAN

AIR
CONDITIONER

Typical
FAN COIL

[_
m
A02326

Fig. 5--Generic Wiring Diagrams
(See Thermostat Installation Instructions for specific unit combinations.)
LEGEND
24-V FACTORY WIRING
24-V FIELD WIRING
FIELD SPLICE CONNECTION
(_

CONTACTOR

A97368

EXAMPLE:

9. If unit

25 ft - 15 ft
COOLING
valid
i.

i0 ft X 0.6 ozift
ONLY

when indoor
Operate

6 oz of additional

PROCEDURE
airflow

unit

charge

The following

is within

a nlininmm

± 21 percent

procedure

of its rated CFM.

minutes

before

checking

charge.
2. Measure
suction

suction
valve

3. Measure
mistor
valve.

pressure

service

suction

temperature

type or electronic

attaching

an accurate

gage

Step

12--Final

thermometer

an accurate

to suction

ther-

line at service

outdoor

5. Measure

air &y-bulb

indoor

air (entering

rare with a sling
to Table

entering

temperature

Securely

indoor

coil)

3. Leave

with thermometer.
wet-bulb

3. Find

outdoor

temperature

temperature.

tempera-

fasten

User's

note

and suction

pressure.

temperature

At this intersection,

located
note

in item 6

suction

line

temperature.
8. If unit

has

temperature,
reached.

line

temperature

until

than

charted

temperature

job, be sure to do the following:
and covers.

valve stem caps to 1i12-tum
Manual

with

maintenance

owner.

Explain

past finger
system

requirements

outlined

Checklist

and place

Installation

tight.

operation

in mmmal.
in customer

CARE AND MAINTENANCE

superheat.
7. Refer to Table 4. Find superheat

leaving

all panels

service

4. Fill out Dealer
file.

and evaporator

At this intersection,

refrigerant

Before

and periodic

psychrometer.

air wet-bulb

suction

reclaim

Checks

IMPORTANT:
by attaching

a lower

10. If outdoor
air temperature
or pressure
at suction
valve
changes, charge to new suction line temperature
indicated on
chart.

2. Tighten

4. Measure

6. Refer

port.

has

temperature,
reached.

For continuing
ment

_ailure,

high performance
periodic

and to minimize

maintenance

must

possible

be perlbrmed

equipon

this

equipment.
a higher
add

suction

refrigerant

line temperature
until

charted

than

charted

temperature

Frequency
areas,
frequent

of maintenance

such

coastal

maintenance.

may

vary

applications,

depending
which

may

geographic

require

Table 3--Superheat
OUTDOOR
TEMP
(OF)
55

50
9

52
12

54
14

56
17

58
20

60
23

62
26

64
29

66
32

68
35

fl0

....

......

.......

100

........

105

........

110

.........

115

..........

--Where

EVAPORATOR

Charging

a dash appears,

NOTE: Superheat

ENTERING AIR TEMPERATURE

do not attempt to charge system under these conditions

or refrigerant

slugging may occur

(°FWB)

Charge must be weighed in

°F is at low-side service port

Table 4--Required
SUPERHEAT
TEMP
(°F)
0

SUCTION

Suction-Line Temperature
PRESSURE

AT SERVICE

PORT (PSIG)

6! .5
35

64.2
37

67.1
39

70.0
41

73.0
43

76.0
45

79.2
47

82.4
49

85.7
51

SERVICE TRAINING

Packaged Service Training programs are an excellent way to increase your
knowledge of the equipment discussed in this manual, including:
• Unit Familiarization • Maintenance
• Installation Overview • Operating Sequence
A large selection of product, theory, and skills programs is available, using popular
video-based formats and materials. All include video and/or slides, plus companion
book.
Classroom Service Training plus "hands-on" the products in our labs can mean
increased confidence that really pays dividends in faster troubleshooting, fewer
callbacks. Course descriptions and schedules are in our catalog.
CALL

FOR FREE CATALOG

1-800-644-5544

[ ] Packaged Service Training [ ] Classroom Service Training
A94328

2003 CARRIER

Manufacturer
Book_ 1_ 4
Tab 13al 2a

Corp. • 7310 W. Morris St • indianapolis,

reserves the right to discontinue,
PC 101

Catalog No

533-80090

IN 46231

38tra6si

or change at any time, specifications
Printed in U.S.A.

Form

or designs

38TRA-6SI

without

notice

and without

Pg 8

02-03

incurring

obligations.

Replaces:

38TRA-5SI

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Carrier 38TRA018 SERIES300 User Manual CONDENSING UNIT Manuals And Guides L0411016

CARRIER Air conditioner/heat pump(outside unit) Manual L0411016 CARRIER Air conditioner/heat pump(outside unit) Owner's Manual, CARRIER Air conditioner/heat pump(outside unit) installation guides

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