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WELCOME TO EFFICIENT
HOME COOLING COMFORT
! WARNING
To prevent personal injury, death, or property
damage, read and follow all instructions and
warnings, including labels shipped with or attached to unit before operating your new comfort
system.
Congratulations on your excellent choice and sound investment in year-round home comfort!
Your new WeatherMaker GTX represents both the latest in
engineering development and the culmination of many
years of experience from one of the most reputable manufacturers of comfort systems.
Your new unit is among the most energy-efficient and
reliable systems available today. To assure its dependability,
spend just a few minutes with this booklet now. Learn about
the operation of your system, and the small amount of maintenance it takes to keep it operating at its peak efficiency.
With minimal care, your new WeatherMaker GTX will provide you and your family with year-round home comfort—
both now and for years to come.
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 water source comfort
system.
A typical WeatherMaker GTX system is illustrated in Fig. 1.
An optional duct heater for supplemental heat and an
optional domestic hot water kit (or desuperheater) are also
illustrated. The GT Flow Center is used to house the
circulating pumps and provide the means to connect the
WeatherMaker GTX to the earth loop.
Each unit has a rating plate affixed to it which provides
necessary information for specific identification of a unit.
You should familiarize yourself with the product, model, and
serial numbers listed on each rating plate.
! WARNING
Improper installation, adjustment, alteration, service, 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 assistance. The qualified installer or agency must
use factory-authorized kits or accessories when
modifying this product.
THERMOSTAT
HEAT
50 60 70 80
50 60 70 80
COOL
ROOM TEMPERATURE
SUPPLY
AIR
OPTIONAL PLENUM HEATER
RETURN
AIR
BREAKER
BOX
DRAIN
VALVE
ACCESSIBLE
FILTER/RACK
FUSE
BOXES
CONVENTIONAL
HOT WATER
TANK
WATER-SOURCE
HEAT PUMP UNIT
CONDESATE
DRAIN
P/T PLUGS
LOOP MANIFOLDS
BALL VALVE
GT FLOW CENTER
Fig. 1—Typical WeatherMaker GTX Installation
2
IMPORTANT FACTS
OPERATING YOUR WEATHERMAKER GTX
To better protect your investment and to eliminate unnecessary service calls, familiarize yourself with the following
facts:
• Your WeatherMaker GTX system should never be operated without a clean air filter properly installed. Plan to inspect the filter periodically. A clogged air filter will increase
operating costs and shorten the life of the system.
• Supply-air and return-air registers should not be blocked.
Drapes, furniture, and toys are some of the items commonly
found obstructing grilles. Restricted airflow lessens the
unit’s efficiency and life span.
• Your multipurpose indoor thermostat is the control center
for your heat pump system. You should familiarize yourself
with its proper operation. If you have any questions about its
operation, read the thermostat literature or ask your Dealer.
• During heating increasing the thermostat 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 comfort by running the fan continuously. Air pockets can form
due to the structure of the house, placement of registers, etc.
These air pockets may be too cool or warm for your liking.
Continuous fan operation minimizes any temperature differences. Also, systems equipped with electronic air cleaners
and/or humidifiers offer the added benefits of having the air
continuously cleaned year-round, and humidified during the
winter season.
• Your WeatherMaker GTX will remove humidity from your
home during the cooling season. After a few minutes of operation, you should be able to see water trickle from the condensate drain of the cooling coil. Check this occasionally to
be sure the drain system is not clogged. Do not expect to see
much drainage if you live in a dry environment.
• Your heating system supplies air at 95° to 105°F instead of
in sudden bursts of hot air as with a conventional furnace.
The operation of your system is controlled by the indoor
thermostat. You simply adjust the thermostat and it maintains the indoor temperature at the level you select. Most
thermostats for geothermal systems have 4 controls: the
temperature control selector, FAN switch, SYSTEM switch,
and EMERGENCY HEAT switch.
The temperature control selector can be a button or lever
that allows you to establish the degree of temperature that
you wish to maintain for your personal comfort. Some thermostats possess 2 temperature control selectors: 1 for setting the temperature desired during the cooling cycle, and
1 to set the heating operation temperature. Typical settings
are 76В°F for cooling and 70В°F for heating.
The FAN switch offers 2 options for controlling the blower:
AUTO and ON. When set to AUTO, the blower will run
during the time the system is operating. When the FAN
switch is set at the ON position, the blower will run
continuously.
Typically, the SYSTEM switch on your thermostat offers
the following selections: COOL, OFF, and HEAT. Your thermostat may also have a fourth selection, AUTO. The heat/
cool system will not operate when the SYSTEM switch is set
at the OFF position. With the SYSTEM switch set at COOL,
your system will operate in its cooling mode when the indoor temperature rises above the level that you wish to
maintain. With the SYSTEM switch set at the HEAT
position, your system will provide warmth whenever the
indoor temperature falls below the level that you have
selected.
The AUTO selection found on some thermostats provides
for automatic changeover between cooling and heating cycles. With the SYSTEM switch set in the AUTO position,
the cooling mode is activated when the indoor temperature
rises above the thermostat cooling temperature setting, or
the heating mode will be activated when the indoor temperature drops below the thermostat setting for the heating
cycle.
Depending on your typical winter heating needs, your home
comfort system may include a supplementary heating
source. The EMERGENCY HEAT switch provides for convenient selection between the 2 heating appliances. Your
WeatherMaker GT will operate when the switch is set at
NORMAL. With the switch set at the EMERGENCY HEAT
position, the geothermal system will turn off and the supplementary heat source will be activated.
In certain geographic areas and in certain applications, electric heat is not required. Any questions regarding your application should be directed to your dealer.
EMER PUMP
MALF
AUX
COOLING CYCLE
When operating in the cooling cycle, your system will run
until the indoor temperature is lowered to the level you have
selected. On extremely hot days, your system will run for
longer periods at a time and have shorter off periods than
on moderate days.
The following are typical conditions that add extra heat
and/or humidity to your home. Your cooling unit will work
longer to keep your home comfortable under these
conditions:
• Entrance doors are frequently opened and closed
Fig. 2—Night Setback
Thermostat
3
• Laundry appliances are being operated
• A shower is running
MAIN
• More than the usual number of people are present
in the home
ON
• More than the normal number of electric lights are
in use
• Drapes or blinds are open on the sunny side of
the home
OFF
HEATING CYCLE
With the SYSTEM switch of your indoor thermostat set
to the HEAT position, the heating section of your home
comfort system will operate until room temperature is
raised to the level you have selected. Of course, the heating
unit will have to operate for longer periods to maintain a
comfortable environment on cooler days and nights than on
moderate ones.
Fig. 3—Main Electrical Disconnect
CHECK THE AIR FILTER
A dirty air filter will cause excessive strain on the compressor and blower motor. This can cause the components to
overheat and automatically shut down. In the extreme, the
components will fail and need to be replaced. To avoid
inefficient or failed operation of your unit, CHECK THE
FILTER(S) EVERY 3 TO 4 WEEKS. Replace filter(s) when
necessary, or clean the filter(s) if you have the reusable
type.
Disposable filters should be replaced by similar, new filters
of the same dimensions.
The filter may be located in the unit where it connects with
the return-air duct or plenum. (See Fig. 4.) Remove the filter
by sliding it out. Reinstall filter, being certain to secure filter
in filter slot.
Sometimes filters are located behind the return air grille.
Access the filter by removing the return air grille.
EMERGENCY HEAT
The EMERGENCY HEAT setting on your thermostat refers to any supplementary heating appliance that may be
included in your home comfort system. Operation of the
EMERGENCY HEAT source may be required if heating demands exceed the capacity of the geothermal systems, or if
there is a malfunction.
The red light on your thermostat will illuminate if the
EMERGENCY HEAT switch is moved from NORMAL to
the EMERGENCY HEAT setting. This indicates that the
geothermal system is off and the supplemental heating
appliance is selected for operation.
Also, if your particular model includes a service alarm
circuit, the red light will glow if the compressor malfunctions. Call your dealer for immediate service if you suspect
trouble.
PERFORMING ROUTINE MAINTENANCE
With the proper maintenance and care, your WeatherMaker GTX unit will operate economically and dependably.
Maintenance can be accomplished easily by referring to
the following directions. However, before performing
maintenance, consider these important safety
precautions:
• DISCONNECT ALL ELECTRICAL POWER TO
THE SYSTEM BEFORE REMOVING ACCESS
PANELS TO PERFORM MAINTENANCE. THERE
MAY BE MORE THAN 1 ELECTRICAL DISCONNECT
SWITCH.
• ALTHOUGH SPECIAL CARE HAS BEEN TAKEN
TO MINIMIZE SHARP EDGES IN THE CONSTRUCTION OF YOUR UNIT, BE EXTREMELY CAREFUL
WHEN HANDLING PARTS OR REACHING INTO
THE UNIT.
Fig. 4—Removing Filter from Unit
4
AIR COIL
REGULAR DEALER MAINTENANCE
If the WeatherMaker GTX has only been operated with a
clean filter in place, the air coil may require minimal cleaning. You may use a vacuum cleaner and soft brush attachment to remove any accumulation of dust from the top and
underside of the finned coil surface. However, perform this
maintenance only when the coil is completely dry.
If you cannot get the coil clean by this method, call your
dealer for service. It may be necessary to clean the coil with
a detergent solution and rinse it with water. This could require the removal of the coil. You should not attempt this
yourself.
In addition to the routine
maintenance that you perform, your home comfort
system should be inspected
regularly by a properly
trained service technician.
The inspection (preferably
twice each year, but at least
once every year) should include the following:
• Routine inspection of air filter(s). Replacement or cleaning
as required.
• Inspection and cleaning of the blower wheel, housing, and
motor as required.
• Inspection and, if required, cleaning of coils.
• Inspection of the air coil drain pan, plus the primary and
secondary drain lines. If supplied, the auxiliary drain pan and
line should be inspected at this time. Service should include
cleaning if required.
• A check of all electrical wiring and connections.
• A check for secure physical connections of individual components within units.
• Operational check of the system to determine actual working condition. Necessary repair and/or adjustment should
be performed at this time.
Your servicing dealer may offer an economical service
contract that covers seasonal inspections. Ask for further
details.
BEFORE YOU REQUEST A SERVICE CALL
BEFORE YOU CALL FOR SERVICE, CHECK FOR
THESE EASILY SOLVED PROBLEMS:
• Check all disconnect switches. Verify that circuit breakers
are on and that fuses have not blown.
• Check for sufficient airflow. Check the air filter(s) for any
accumulations of dirt. Check for blocked return-air or supply-air grilles. Be sure grilles are open and unobstructed.
• Check the settings on your thermostat. If you desire cooling, see that the temperature control selector is set below
room temperature and the SYSTEM switch is on the COOL
or AUTO position. If you require warmth, be sure the temperature control selector is set above room temperature and
the SYSTEM switch is at HEAT or AUTO. The FAN switch
should be set at ON for continuous blower operation or
AUTO if you wish blower to function only while the unit is
operating.
If your comfort system still fails to operate, contact your servicing dealer for troubleshooting and repairs. Specify your
apparent problem, and state the model and serial numbers
of your equipment. With this information, your dealer may
be able to offer helpful suggestions over the phone or save
valuable time through knowledgeable preparation for the
service call.
FOR THE RECORD
Record the model, product, and serial numbers of your new
equipment in the spaces provided. This information, along
with the other ready-reference facts requested will be necessary should you ever require information or service.
5
INSTALLATION DATA
MODULAR INDOOR UNIT, if Applicable:
Date Installed
Loop Pump Module/Flow Center
Dealer Name
Model No.
Address
Serial No.
City
State
Zip
Heater
Telephone
Model No.
WEATHERMAKER GTX
Serial No.
Model No.
Serial No.
TO OBTAIN INFORMATION ON PARTS: Consult your installing dealer or classified section of your local telephone directory under the
“Heating Equipment’’ or “Air Conditioning Contractors & Systems’’ headings for dealer listing by brand name.
Have available the Model No., Series Letter & Serial No. of your equipment to insure correct replacement part.
Carrier Corporation
Syracuse, New York 13221
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations .
Copyright 1994 Carrier Corporation
Form: OM50YB-1
Printed in the U.S.A.
7-94
PC 101
Catalog No. 535-000
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