Carrier 38BYG048 SERIES300, 38BYG060 SERIES300, 38BYG042 SERIES300, 38BYG036 SERIES300, 38BYG030 SERIES300 Owner’s Manual

HEATUNG & COOUNG

%isitx__ _.¢arrier.com

Installation and Start-Up Instructions

NOTE: Read the entire instruction manual before starting the
installation.

This symhoi --> indicates a change since the last issue.

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteratiom service, maintenance,
or use can cause explosion, fire, electrical shock, or other
conditions which may cause death, personal injury, or property
damage. Consult a qualified installer_ service agency, or your
distributor or branch for infornmdon or assistance. The qualified

installer or agency must use _hctory=authorized kits or accessories
when modi_}-ing this product. Refer to the individual instructions
packaged with the kits or accessories when installing.

Follow all safety codes. Wear safety glasses, protective clothing,

and work gloves. Use quenching cloth t:br brazing operations.

Have fire extinguisher available. Read these instructions thor-

oughly and _\_llow all warnings or cautions included in literature

and attached to the unit. Consnh local building codes and National

Electrical (?ode (NEC) [br special requirements.

Recognize safety informatiom This is the safety-alert symbolz_ .

When you see this symhol on the unit and in instructions or

manuals, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING, and CAU=

TION. These words are used with the saf_b_-alert symbol. DAN-

GER identifies the most serious hazards which will result in severe
personal injury or death. WARNING signifies hazards which

could result in personal injury or death. (AUTION is used to

identify unsafe practices which would result in minor personal

injuw or product and property damage. NOTE is used to highlight

suggestions which will result in enhanced installation, reliability,

or operation.

Be%re installing, modif}'ing, or servicing system, main elec-
trical disconnect switch must be in the OFF position. There
may be more than 1 disconnect switch. Lock out and tag
switch with a suitable warning tahet. Electrical shock can
cause personal injury or death.

iNSTALLATiON RECOMMENDATBONS

NOTE: In some cases noise in the living area has been traced to

gas pulsations fiom improper installation of equipment

h Locate unit away fiom window< patios, decks, and so forth

where unit operation sounds may disturb customer

2. Ensure that vapor- and liquid-robe diameters are appropriate to
capacity of unit

3. Rm_ refrigerant tubes as directly as possible by avoiding

unnecessary rams and bends.

38BYC, 38BYG

12 SEER SpMit System

Heat Pump

A98525

Fig. 1--Mode{ 38BYG

4 Leave some slack between structure and unit to absorb

vibration

5 When passing refi'igerant robes through the wall, seal opening

with RTV or other pliable silicon based caulk. (See Fig. 2.)

6. Avoid direct robing contact with water pipes, duct work, floor
joists, wall studs, floors, and walls.

7. Do not suspend refiigerant tubing fi'om joists and studs with a

rigid wire or strap that comes in direct contact with robing.
(See Fig. 20

8. Ensure that robing insulation is pliable and completely sur-

rounds vapor tube.

9. When necessary, use hanger straps which are 1 in. wide and

con_bm_ to shape of robing insulation. (See Fig. 20

10. Isolate hanger straps from insulation by using metal sleeves
bent to confbrm to shape of insulation.

When outdoor unit is connected to ihctory-approved indoor unit,
outdoor unit contains system refrigerant charge fbr operation with

indoor unit of the same size when connected by 15 fi of
field-supplied or factoo'-accesso<v robing. For proper unit opera-
tion, check refi'igerant charge using charging information located

on control box cover.

IMPORTANT: Maximun_ liquid line size is 3/8-im O.D. fc_r all
residential applications including long line.

INPORTANT: Always install a liquid line filter drier on any
system using existing field service line sets and or existing indoor
coil or fan coil units. Always use a filter direr on burnout unit
replacements.

Manufacturer reserves the right to dissontinue, or change at any time, specifications or designs without notise and without insurring obligations,

PC 101 Catalog No. 533-80078 Printed in USA Form 38BYC-3SI Pg 1 11-02 Replaces: 38BYC-2SI

NOTE: Avoid contact between tubing and structure

_-- OUTDOOR WALL--_ INDOOR WALL_"

-_. CAULK

I

1

C

lq/N 7/_ vAPOR TUBE

SULATi

THROUGH THEWALL

HANGERSTRAP*_ l_lr'f--JOIST

(AROUNDVAPOR_

TUBEONLY) _,,\ /_ INSULATION

.............................()

i __.-VAPOR TUBE

r'MtN.--I I_ L LIQUIDTUBE

SUSPENSION

A94028

Fig. 2--Connecting Tubing Installation

_NSTALLATION

Step l--Check Equipment and Job Site

L NPA(K UNIT
Move to final location, Remove carton, taking care not to damage

uniL

]:NSPECT EQUIPMENT

File claim with shipping company prior to installation if shipment

is damaged or incomplete. Locate unit rating plate on unit service

panel. It contains int'ornaation needed to properly install unit.

Check rating plate to be sure unit matches job specifications.

Step 2--Bnstall On A Solid, Level Mounting Pad

[f conditions or local codes require the unit be attached to pad,

tiedown bolts should be used and fastened through knockouts
provided in unit base pan. Refer to unit mounting pattern in Fig. 3
to detem_ine base pan size and knockout hole location.

On rooftop applications, mount on level platform or _?ame. Place

unit above a load bearing wall and isolate unit and robing set fi'om

strocture. Arrange supporting members to adequately support unit
and minimize transmission of vibration to building. Consult local
codes governing rooftop applications.

Roof mounted units exposed to winds above 5 mph may require
wind baft'les to achieve adequate defrost. Consult Low Ambient

Guideline for wind baffle construction.

NOTE: Unit must be level to within ÷ 2° (÷ 3/8 inJft) per
compressor manufacturer specifications.

Step 3--Clearance Requirements
When installing, allow sufficient space for airflow cleaIance,

wiring, refrigerant piping, and service Allow 30-in clearance to

service end of unit and 48 in above uniL For proper airflow, a 6=in
clearance or* 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 Pall
directly on unit

1

I 3/8"D (953) TIEDOWN

KNOCKOUTS (2) PLACES

B .I

Dimensions On.)

UNIT
SRZE

018-024
030°060

On rooftop applications, locate unit at least 6 in. above roof
surface.

Step 4-==Operating Ambient

The minimum outdoor operating ambient in cooling mode is 55°F,
and the maximum outdoor operating ambient in cooling mode is

125°F The maximum outdoor operating ambient in heating mode

is 66°F,

Step 5--Elevate Unit

Accumulation of water and ice in base pan may cause
equipment damage.

In areas where prolonged freezing temperatures are encountered,
elevate unit per local climate and code requirements to provide

clearance above estimated snowfidl level and ensure adequate
drainage of unit

Step 6--Remove Indoor AccuRater® Piston and Install
TXV

For proper unit operation and reliability, units must be
installed with field supplied hard shutoff TXV Do not install
with evaporator coils having capiltaQ" robe metering devices
or pistons.

For TXV kit part number and charging instructions, refer to TXV
label in outdoor unit If indoor unit (fire coil) comes f_cto_
equipped with a bi-flow hard shutoff TXV, no TXV change is
required,

NINIMUM TIEDOWN KNOCKOUT LOCATIONS

MOUNTING-PAD

DIMENSIONS A B C

22-112 X 22-1/2 3-11116 18-1/8 14-3/8

30 X 30 6-1/2 23-1/2 20

Fig. 3--Mounting Unit to Pad

I

A94199

If TXV installation is required, remove existing AccuRater_ t'rom
indoor coil Re_r to Figs 4 and 5 and install TXV kit as _bllows:

1_ Install suction robe adapter_

2. Install liquid flareoto-sweat adapter.

3. Connect external equalizer robe to fitting on suction robe
adapter.

4. Position sensing bulb on horizontal portion of suction robe
adapter. Secure using supplied hardware.

5. Insulate bulb aRer installation. (See Fig. 5.)

d. Leak check all connections.

feeder tubes, there is a 3/%in. O.D. stub robe approximately 2 in.
tong. (See Fig. 60 The defrost thermostat should be located on stub

mbe_ Note that there is only 1 stub robe used with liquid header,
and on most units it is the bottom circuit_

f STUB TUBE

DEFROST
THERMOSTAT

BULB

UALIZER

TUBE

EXPANSION

VALVE

A88382

Fig. 4--Typical TXV Insta!lation

O'CLOCK

2

SENSING

L-_'S UCTIO N

8 O'CLOCK 4 O'CLOCK

7_ IN. OD & SMALLER LARGER THAN 7_ IN. OD

A81032

Fig. 5--PositioNng of Sensing Bulb

Step 7--Check Outdoor AccuRater® Piston
(beck outdoor unit piston Remove retainer on liquid service valve

and check piston size with n_atching nm'uber listed on outdoor unit

rating plate.

Step 8--Check Defrost Thermostat
(heck defiost thermostat to ensure it is properly located and

securely attached There is a liquid header with a brass distributor
and feeder robe going into outdoor coil At the end of 1 of the

A97517

Fig. 6--Defrost Thermostat Location

Step 9--Make Piping Connections

Relieve pressure and recover all refi'igerant before system
repair or final unit disposal to avoid personal ir_.iuI?' or death.

Use all service ports and open all flow control devices,

including solenoid valves.

If ANY refrigerant robing is buried, provide a 6 in. vertical
rise at service valve, Ret'rigerant robing lengths up to 36 in,
may be buried without further special consideration. For
lengths longer than 36 in., refer to Application Guideline and

Service Manual Residential Split System Air ( onditioners

and Heat Pumps,

To prevent damage to unit or service valves obsela'e the
fbllowing:
*Use a brazing shield
*Wrap service valves with wet cloth or use a heatosink

material

Outdoor units may be connected to indoor section using accesso_
robing package or field-supplied refrigerant grade robing of coll'ect

size and condition For robing requirements beyond 50 it, substan-
tial capacity and per_brmance losses can occur Following the

recommendations in the Residential Split System Long-Line
Application Guideline will redtlce these losses. Ret'cr to Table 1
for field tubing equivalent line length Refer to Table 2 _br
accessory requirements

For buried line applications greater than 36 in., refer to Table 2 and
Residential Split System Buried Line Application Guideline.

Buried line applications may not exceed 100 t't.
If refrigerant tubes or indoor coil are exposed to atmosphere, they

must be evacuated to 500 microns to eliminate contamination and
moisture in the system