Trane YC-UC-6 User's Information Manual
User’s Information Guide
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Combination Cooling/Gas Heating Packaged Unit
IMPORTANT: Read this entire manual before proceeding and keep for future reference.
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WARNING
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SAFETY HAZARD!
This information is for use by individuals having adequate
backgrounds of electrical and mechanical experience.
Any attempt to repair a central air conditioning product
may result in personal injury and/or property damage. The
manufacturer or seller cannot be responsible for the interpretation of this information, nor can it assume any liability
in connection with its use.
Contents
General Information 1
To Start the Heating System 3
YC-UC-6
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WARNING
If the information in this manual is not followed exactly,
a fire or explosion may result causing property
damage, personal injury or loss of life.
— Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch;
do not use any phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
• If you cannot reach your gas supplier,
call the fire department.
— DO NOT RELY ON SMELL ALONE TO DETECT
LEAKS. DUE TO VARIOUS FACTORS, YOU MAY
NOT BE ABLE TO SMELL FUEL GASES.
• U.L. recognized fuel gas and CO detectors are
recommended in all applications, and their
installation should be in accordance with the
manufacturer's recommendations and/or local
laws, rules, regulations, or customs.
— Installation and service must be performed by a
qualified installer, service agency or the gas
supplier.
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WARNING
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EXPLOSION HAZARD!
Propane gas is heavier than air and may collect in any low
areas or confined spaces. In addition, odorant fade may
make the gas undetectable except with a warning device.
If the gas furnace is installed in a basement, an excavated
areas or a confined space, it is strongly recommended to
contact a gas supplier to install a gas detecting warning
device in case of leak. The manufacturer of your furnace
does not test any detectors and makes no representations
regarding any brand or type of detector.
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WARNING
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FIRE OR EXPLOSION HAZARD. The furnace area must be
kept clear and free of combustible materials, gasoline and
other flammable vapors and liquids.
Proper Filter Maintenance 4
Regular Owner Maintenance 4
Regular Dealer Maintenance 5
Limited Warranty 6
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WARNING
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FIRE OR EXPLOSION HAZARD. Do not use this furnace if
any part has been under water. A flood-damaged furnace
is extremely dangerous. Attempts to use the furnace can
result in fire or explosion. A qualified service agency
should be contacted to inspect the furnace and to replace
all gas controls, control system parts, and electrical parts
that have been wet if deemed necessary.
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WARNING
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FIRE OR EXPLOSION HAZARD. Should overheating
occur, or the gas supply fail to shut off, shut off the
manual gas valve to the furnace before shutting off the
electrical supply.
In the event that electrical, fuel or mechanical failures
occur, the owner should immediately turn off the gas
supply at the manual gas valve located in the burner
compartment and electrical power to the furnace and
contact service technician.
User’s Information
General Information
Understand the signal words DANGER, WARNING, and
CAUTION. These words are safety alert words. DANGER
indicates the most serious hazards which
will result in
severe personal injury or death. WARNING indicates
hazards which
could result in personal injury or death.
CAUTION is used to indicate unsafe practices which could
result in minor injury or property damage.
Overview
Your combination gas heating/electric cooling unit is designed to provide comfort all year long with safe, efficient,
trouble-free operation. It is important that you understand
how to operate and maintain your unit to keep it operating
safely and efficiently. This guide will acquaint you with
these important procedures. Familiarize yourself with this
manual and store it in a convenient location for future
reference.
Any additions, changes, or conversions required in order for
the unit to satisfactorily meet the application needs, should
be made by a qualified product distributor or local dealer,
using factory specified and approved parts. See Figure 1 for
component layout.
Remember these instructions at all times:
◆ Never perform any maintenance procedures until the
electrical power to the unit is turned off.
◆ Never perform any maintenance procedures until the gas
valve in the gas supply line is turned off.
◆ Never remove any panel from the unit while it is operating.
◆ Never remove panels or parts from the unit that are not
discussed in this guide.
◆ Never cover the unit since it is designed to operate year
round.
◆ Never store anything flammable or combustible around or
near the unit.
Your unit is of complex design. To ensure that it performs
safely and gives long-lasting service, some of the maintenance work must be performed by a qualified service
technician.
When a service technician is referred to in this manual, it is
describing a service technician that has had special
training or a number of years experience in servicing
this type of equipment. It is your responsibility to select a
qualified service company that can provide a service technician of this caliber.
Thermostat
Room thermostats are delicate temperature-sensing controls.
Their main function is to energize and de-energize the heating
or cooling circuit to maintain the temperature setting you
select.
Many thermostats contain a room thermometer to indicate the
approximate room temperature, and a temperature scale to
select the desired indoor air temperature. In addition, most
thermostats have modes of HEAT, OFF and COOL, and fan
modes of ON and AUTO.
When OFF is selected your unit will not operate in either heat
or cool modes. If HEAT or COOL is selected, the unit will
automatically cycle on and off to maintain the desired temperature settings.
When AUTO is selected, the fan will only operate as required
during the heating or cooling cycles. The fan mode can be used
to operate the indoor fan continuously by selecting ON. Con-
tinuous fan mode during cooling operation may not be appropriate in humid climates. If the indoor air exceeds 60% relative
humidity or simply feels uncomfortably humid, it is recommended that the fan only be used in the AUTO mode.
To ensure that the thermostat operates properly, it must be
level and positioned to avoid the influence of such external heat
sources as lamps, televisions or other heat-producing appliances.
Two Stage Cooling Models --For units with the feature of
two staged cooling, the thermostat will determine whether
to run the system at the full capacity or a lower capacity.
This depends on the daily cooling load of the conditioned
space. The system is more efficient when running at low
capacity (1
will be sufficent to maintain indoor comfort.
With the thermostat set to COOL, the system will
automatically cycle on and off as well as from low (1st stage)
to high (2
point for indoor comfort. During 1
compressor, as well as the indoor fan, will run at a reduced
speed. This produces a reduced capacity which is more
efficient than the high capacity 2
(1st stage) is not sufficient to maintain the thermostat
setting, the system will switch to high speed (2
the thermostat temperature setting is reached, the system
will cycle to low speed then off.
st
stage). At lower outdoor temperatures 1st stage
nd
stage) as needed to maintain the thermostat set
st
stage operation the
nd
stage. If the low capacity
nd
stage). As
Compressor
Indoor
Blower
Motor
Note: Depending on furnace size,
your unit may have 1, 2, or 3
burners.
2
Heat Exchangers
Gas Valve
Burners
Figure 1. Component Layout
User’s Information
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To Start the Heating System
Heating Cycle Operation
Your unit's heating system has a solid-state electronic
ignition control that lights the furnace burners each time the
thermostat calls for heat. At the end of each heating cycle, the
furnace burners are extinguished. This type of system is
called Direct Spark Ignition (DSI).
A normal heating cycle begins when the air temperature in
your home drops below the thermostat setting. The thermostat then energizes the heating electrical circuit that starts
and controls the furnace burners. Shortly after the burners
ignite, the indoor fan starts and circulates warm air through
your home.
When the air temperature rises above the thermostat setting,
the thermostat de-energizes the heating electrical circuit,
which in turn, extinguishes the furnace burners. The indoor
fan continues to circulate warm air until the remaining heat
is removed from the unit's heat exchanger.
Safety Controls
Your unit is equipped with an automatic reset safety limit
control to prevent overheating. When this control opens, it
shuts down the heating electrical circuit until the unit cools
down sufficiently. Inadequate airflow may cause the unit to
cycle on and off as the limit control trips and automatically
resets. If you suspect that the unit is cycling on its limit
control, immediately contact a service technician for instructions.
If the unit is unable to exhaust combustion by-products
properly, due to a blocked flue hood or other blockage, a
pressure switch safety device will prohibit the unit from
operating. The cause must be investigated by a qualified
service technician.
If flames from the burner are not properly drawn into the heat
exchanger, a Flame Rollout Protection Control will open
causing the furnace to shut off. The cause must be investigated by a qualified service technician.
Heating System Start Up
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CAUTION
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Never attempt to manually light the burner. This unit is
equipped with an ignition device which automatically lights
the burners.
3. Remove the access panel that is identified as CONTROL/
HEAT.
4. Turn gas control off by moving the toggle switch to OFF.
See Figure 2 on page 5.
5. Wait five (5) minutes to clear any gas. If you then smell
gas, STOP!, for your safety follow the “What To Do If You
Smell Gas” instructions on the front page. If you do not
smell gas, go to next step.
6. Turn gas on by moving the toggle switch to ON.
7. Replace the panel that you removed in Step 3 and make
sure all other unit panels are securely in place.
8. Turn on all electrical power to the unit.
9. Set thermostat to desired temperature and the fan to ON.
The unit will now operate automatically.
10.If the unit will not operate, perform the steps in the
following section, "To Turn Off Gas To Unit" (under
Heating System Shutdown) and call your service technician or gas supplier.
NOTE: The unit is to be adjusted to obtain a temp air rise that is
specified on the nameplate.
Heating System Shutdown
To shut down the heating system for brief periods of time,
simply adjust the thermostat selector switch to the OFF
position.
If you need to turn the gas off to the unit, follow the steps
below:
To Turn Off Gas To Unit
1. Set the thermostat to lowest setting.
2. Turn off all electric power to the unit if service is to be
performed.
3. Remove the access panel that is identified as CONTROL/
HEAT.
4. Turn gas control off by moving the toggle switch to OFF.
See Figure 2 on page 5.
5. Replace the panel you removed in Step 3.
Your unit has an automatic ignition system. This feature
makes it easy to start the heating cycle at the beginning of
the heating season.
In order for this unit to operate properly and safely, the
furnace needs air for both combustion and ventilation.
Accordingly, observe the area in which the furnace is installed.
Check to make sure that all the air openings are unobstructed. Likewise, insure that the spacing around the furnace
itself is not blocked or obstructed.
1. Set the thermostat to lowest setting.
2. Turn off all electric power to the unit if service is to be
performed.
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CAUTION
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If you shutdown your heating system during the cold
weather months, precautions must be taken to prevent
freeze-up of all water pipes and water receptacles. When-
ever your home or building is to be vacant, arrange to have
someone inspect your structure for proper temperature. This is
very important in below freezing weather. If for any reason
your furnace should fail to operate, damage such as frozen
water pipes could result.
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