Carrier 38BYC030 SERIES310, 38YCC018 SERIES300, 38YKC030 SERIES320, 38YRA036 SERIES300, 38YRA042 SERIES300 Owner’s Manual

NOTE TO INSTALLER: THIS MANUAL SHOULD BE LEFT WITH THE EQUIPMENT USER.

WELCOME TO EFFICIENT
YEAR-ROUND COMFORT

Congratulations on your excellent choice and sound invest-
ment in year-round home comfort!

Your new heat pump represents both the latest in engineering
development and the culmination of many years of experience
from one of the most reputable manufacturers of comt\_rt

systems.
Your new unit is among the most energy-efficient and reliable

heat pump products available today. To assure its dependabil-
ity, spend just a few minutes with this booklet now. Learn about
the operation of your heat pump, and the small amount of
maintenance it takes to keep it operating at its peak efficiency.

With minimal care, your new heat pump will provide you and
your family with year-round home comt\)rt--both now aud

for years to come.

I

SAFETY CONSIDERATIONS

Recognize safety int\_rmation. This is the safety-alert symbol

z_. When you see this symbol on the unit and in instructions

or manuals, be alert to the potential t\_r personal injury.
Understand the signal words DANGER, WARNING, and

CAUTION. These words are used with the safety-alert symbol.
DANGER 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. CAUTION is
used to identity unsafe practices which would result in minor
personal injury or product and property damage. NOTE is used
to highlight suggestions that will result inenhanced installation, reli-
ability, or operation.

Improper installation, adjustment, alteration, ser-
vice, maintenance, or use can cause explosion,

fire, electrical shock, or other conditions which

may cause personal injury or property damage.
Consult a qualified installer, service agency, or
your distributor or branch for information or as-
sistance. The qualified installer or service agency
must use factory-authorized kits or accessories
when modifying this product.

To prevent personal injury, death, or property
damage, read and follow all instructions and warn-
ings, including labels shipped with or attached to
unit before operating your new heat pump.

YOUR COMFORT SYSTEM

Identifying Your System

Take the time to familiarize yourself with the type of system
you have. This knowledge will be of use in understanding the
basic operation of your new heat pump.

Fig.l--Typical Split-System Installation

The type of heat pump you have purchased is a split system.
The split-system type has an indoor and an outdoor unit, each
of which contains a coil. These units are interconnected by
refrigerant tubes. (See Fig. 1.)

Each unit has a rating plate affixed to it which provides neces-
sary int\)rmation t\_r specific identification of a unit. You should
familiarize yourself with the product, model, and serial num-

bers listed on each rating plate. Record them t_r future refer-

ence on the last page of this booklet.

IMPORTANT FACTS

To better protect your investment and to eliminate unnecessary
service calls, familiarize yourself with the t\_llowing facts:

• Your heat pump system should never be operated without a
clean air filter properly installed. Plan to inspect the filter peri-
odically. A clogged air filter will increase operating costs and

shorten the life of the unit.

• Supply-air and return-air registers should not be blocked.
Drapes, furniture, and toys are some of the items commonly
t\_und obstructing registers. Restricted airflow lessens the
unit's efficiency and life span.

• The outdoor unit must have unrestricted airflow. Do not cov-
erthe unit, lean anything against it, or stand on it. Do not allow

grass clippings, leaves, or other debris to accumulate around
or on top of the unit. Maintain a 12-in. minimum clearance

between the outdoor unit and tall grass, vines, shrubs, etc.

• Your multipurpose indoor thermostat is the control center
for your heat pump system. You should familiarize yourself
with its proper operation. Attempting to control the system by
other means--f_)r instance, switching the electrical supply
power ON and OFF--may cause damage to the unit. (See Fig.
2 and 3.)

• During heating, increasing the thermostat setting more than
2 degrees may cause the supplemental heaters to be turned on
to satisfy the thermostat. Needless use of the supplementary
heat reduces potential energy savings.

• You may find that you can maintain greater personal com-
t\_lt by running the fan continuously. "Air pockets" can t\)rm
due to the structure of the house, placement of registers, etc.

LCD READOUT DISPLAYS-,., A

CURRENT ROOM TEMPERATURE, \

DESIRED ROOM TEMPERATURE, \

.............. AiD FAN MODE SETTING _

RESET FILTER BUTTON --

RESTARTS THE TIMER

THE NEXT AIR FILTER

CHANGE OR CLEANING

UNIT MODE SETTING,_

THAT CALCULATES

f _- MODE BUTTON SELECTS

BETWEEN OFF HEAT,
COOL, AUTO AND EMERGENCY

HEAT OPERATION

FAN BUTTON CHOOSES
BETWEEN ON OR AUTO
FAN OPERATION

Fig. 2wTypical Carrier Non-Programmable Thermostat

iii;U REi I,f'-",,_ ] SEqq-,NGS

These air pockets may be too cool or warm for your liking.
Continuous fan operation minimizes any temperature differ-
ences. Also, systems equipped with electronic or mechanical

air cleaners and/or humidifiers offer the added benefits of hav-
ing the air continuously cleaned year-round and humidified

during the winter season.

• A system equipped with a heat or energy recovery ventilator
offers the advantage of exhausting stale air from the home and
allowing fresh air in from the outdoors while minimizing heat

loss.

• Your system may also be equipped with a zoning system
which allows individual control over the temperatures of sep-
arate areas of your home.

• Your heat pump will remove humidity from your home dur-

PROGRAM BUTTONS --'-. \ COOL, AUTO, AND ' / DESIRED ROOM TEMPERATURE
FOR PROGRAMMING \ \ EMERGENCY HEAT / ONRI?UTDOOsRTEMPERATURE,

HEATING/COOLING \ \ OPERATION / FAN MODE SETTING'

CYCLES _ _ _ AND TIME OF DAY

IIi _-_-_J.... _ ;,,_i : __ UPCNoDND°N_N EASE

[11 IF_I OR DECREASE THE
I_1 Art UU _ DESIRED TEMPERATURE

MEOTDwEEBLNT;ONSELECTS F LCDRENATD?UTDISPLAYSRATURE

........... ..... ',_ 1 SETTINGS

ing the cooling season. After a few minutes of operation, you
should be able to see water trickle from the condensate drain

of the indoor cooling coil. Check this occasionally to be sure
the drain system is not clogged. Of course, don't expect to see
much drainage if you live in a very dry environment.

• During the heating cycle, air from your registers may seem
cooler than you might first expect. This is because your heat

pump delivers a constant flow of air at around 90°F to 105°F
instead of in sudden bursts of hot air as with a conventional

furnace. This air may feel cool because it is slightly less than
your skin temperature. Howevel: it is sufficiently warm to
keep you comt\_rtaMe.

• Ice or fiost will tend toform on the outdoor coil during the winter
heating operation. Your heat pump is designed to automatically

_T TI_M'_E__l _ _ ...........................................] ..................................' FANBUTToNLI _CHOOSES

BUTTON _ BETWEEN ON OR AUTO

RESET FILTER BUTTON THE CURRENT TEMPERATURE

RESTARTS THE TIMER AND OVERRIDES PROGRAMMED

THAT CALCULATES TEMPERATURE CHANGES

THE NEXT AIR FILTER UNTIL RESET

CHANGE OR CLEANING

..__j_ HOLD BUTTON MAINTAINS

FAN OPERATION

Fig. 3--Typical Carrier Programmable Thermostat