Trane YSC036E, YSC060E, YHC036E, YHC072E, YSC072F Owner's Manual

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May 2013 © 2013Trane RT-SVU03H-EN

All rights reserved

Model Number: YSC036E - YSC060E YHC036E - YHC072E

YSC072F - YSC120F YHC120E
YHC048F - YHC060F YHC072F - YHC102F

SAFETYWARNING

Only qualified personnel should installand service the equipment.The
installation, starting up, andservicing of heating, ventilating, and air­conditioning equipment can be hazardousand requires specific
knowledge and training. Improperly installed,adjusted or altered
equipmentby anunqualified person couldresult indeath orserious injury.

When workingon the equipment,observe all precautionsin the literature

and on the tags, stickers, and labels that are attached to the equipment.

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Owner Manual

Packaged Rooftop Air Conditioners

Precedent™- Gas/Electric
3-10Tons-60Hz

Cautions, Warnings and Notices

Important: Environmental Concerns! Scientific research hasshown
that certainman-made chemicals can affectthe earth's naturallyoccurring
stratospheric ozone layer whenreleased to the atmosphere. In particular,
several of the identified chemicals that may affectthe ozone layer are
refrigerants that contain Chlorine, Fluorineand Carbon (CFCs) and those
containing Hydrogen, Chlorine, Fluorine andCarbon (HCFCs). Not all
refrigerants containing these compoundshave the same potential impact
to the environment.Trane advocatesthe responsible handling of all
refrigerants-including industry replacements forCFCs such as HCFCs and
HFCs.

Important: Responsible Refrigerant Practices!Trane believes that
responsible refrigerant practices are importantto the environment, our
customers, and the air conditioningindustry. All technicians who handle
refrigerants must be certified.The Federal CleanAir Act (Section 608) sets
forththe requirementsfor handling,reclaiming, recoveringand recyclingof
certain refrigerants and theequipment that is used in these service
procedures. Inaddition, some statesor municipalities mayhave additional
requirements thatmust also beadhered to forresponsible managementof
refrigerants. Know the applicable lawsand follow them.

WARNING

Indicates a potentially hazardous situationwhich, if not avoided, could
result in death or seriousinjury

CAUTION

Indicates a potentially hazardous situationwhich, if not avoided, could
result in minor or moderateinjury. It may also be used toalert against
unsafe practices.

NOTICE

Indicates a situation that couldresult in equipment or property-damage
only accidents.

General Information

Important: Remember the following instructions atall times.

WARNING

Hazard of Explosion orFire!

Do notstore or usegasoline or otherflammable vapors and liquidsin the
vicinity of this or anyother appliance.

IFYOU SMELL GAS, follow instructions below:

• Do not try to light any appliance.

• Do not touch any electrical switch.

• Do not use any phone in your building.

• Open windows and doors.

• Alert others and evacuate building immediately.

• From a phone outside of the building, immediatelycall your gas
supplier. Follow the gas supplier's instructions. If you can not reach
your gas supplier,call the fire department.

Failure to follow recommendationslisted above could result in death or
serious injury and equipment orproperty damage.

WARNING

Safety Hazards!

• Do not use thisfurnace if any portionhas been under wateras it may
have rendered the unit hazardousto operate. Immediately call a
qualified service technicianto inspect the furnace andto replace any
part orthe control system and anygas control whichhas been under
water.

• Should overheating occur, or theunit gas valve fail to shut off, close
the gas valve tothe furnace before shutting off the electrical supply.

Failure to follow recommendationscould result in death, serious injury
and equipment or propertydamage.

Yourunit is of complex design.Toensure that it performs safelyand gives

long lastingservices, someof themaintenance work mustbe performedby
a qualified service person.

When aservice person isreferred toin this manualit is describinga service

technicianwho has hadspecial training ora number ofyear sexperience in
servicingthis type ofequipment. Itis yourresponsibility toselect aqualified
service company that canprovide a service person of this caliber.

WARNING

Safety Hazards!

• Never perform anymaintenance proceduresuntil theelectrical power
to the unit is turnedoff.

• Never perform anymaintenance procedures untilthe gas valveis the
gas supply line isturned off.

• Never remove any panels from the unit whileit is operating.

• Never remove panels or partsfrom the unit that arenot discussed in
this manual.

• Never cover the unit since it is designedto operate year round.

Failure tofollow recommendations couldresult in deathor serious injury.

Thermostat

Room thermostats are delicatetemperature sensing controls. Theirmain
function is to energizeand de-energize the heating or cooling circuit to
maintain the temperature settingyou select.

Manythermostats containa roomthermometer toindicate theapproximate
room temperature and atemperature scale at the adjustment indicator to
select the desired indoor airtemperature. In addition, most thermostats
have a selector mode switch with Heat, Offand Cool positions and a fan
switch with Onand Off positions.

When theswitch is positioned atOff your unitwill not operate ineither the

heat or cool modes. Ifthe selector switch is set at Heatthe unit will
automatically cycleon and offto maintain thedesired temperature setting.

The unit will also operateautomatically when the selector switch is

positioned at Cool.

The fanselector switch canbe used to operatethe indoor fancontinuously

by positioning it at On.When set to Autothe fan will only operate when
required during the heating orcooling cycles.

Toensure that the thermostat operates properly, it mustbe level and

positioned to avoid theinfluence of such external heat sources as lamps,
televisions or other heat producingappliances.

Air Filters

Filters are tobe used with this unit. Unitsship from the factory withfilters
installed.

It isvery important tok eepthe central ductsystem air filters clean.Be sure
to inspect them at leastonce each month when the system isin constant
operation. (Innew homes,check thefilters every weekfor thefirst 4 weeks.)
See Table 1for the required filter size(s).
If youhave disposabletype filters,replace themwith newfilters of thesame
type and size. Donot attempt to clean disposable filters.

Permanent type filters canbe cleaned by washing them with a mild
detergent and water.Ensure that the filters are thoroughly dry before
reinstalling them in the unit(or duct system).

It maybe necessaryto replace permanentfilters annuallyif washing failsto
clean the filter,be sure to use the same type and sizeas was originally

Figure 1. Gas unit overview

RETURN AIR

SUPPLY AIR

PRESSURE SWITCH

GAS VALVE

COMPRESSOR

installed.

Table1. Recommended standard filters

Unit Model Number Filter Size

Inches Millimeters

YH/SC036E*, YHC037E* (2) 20x30x2 (2) 508x762x50

YSC048E* (2) 20x30x2 (2) 508x762x50

YSC060E* (2) 20x30x2 (2) 508x762x50

YHC047E*, YHC048* (4) 16x25x2 (4) 406x635x50

YHC060*, YHC067E* (4) 16x25x2 (4) 406x635x50

YSC072F* (4) 16x25x2 (4) 406x635x50

YSC090F* (4) 16x25x2 (4) 406x635x50

YHC072F* (4) 20x25x2 (4) 508x635x50

YSC092F* (4) 20x25x2 (4) 508x635x50

YSC102F* (4) 20x25x2 (4) 508x635x50

YSC120F* (4) 20x25x2 (4) 508x635x50

YHC092F* (4) 20x25x2 (4) 508x635x50

YHC102F* (4) 20x25x2 (4) 508x635x50

YHC120E* (2) 20x30x2 (2) 508x762x50

(3) 20x25x2 (3) 508x635x50

Heating System

Heating Cycle Operation

Yourunit's heating system hasa solid-state electronic ignitioncontrol that

lights thefurnace burnerseach timethe thermostatcalls forheat. Atthe end
of each heatingcycle the furnace burners are extinguished.This type of
system is called Direct SparkIgnition (DSI).

A normal heating cyclebegins when the air temperature drops below the

thermostat setting.The thermostat then energizes theheating electrical
circuit thatstarts andcontrols thefurnace burners.Shortly afterthe burners
ignite theindoor fanstarts and circulateswarm airthrough the conditioned
space.

When theair temperature risesto the thermostatsetting thethermostat de-

energizes the heating electricalcircuit, which in turn extinguishes the
burners.The indoor fan continues to circulate warm airuntil most of the
heat is removed fromthe unit's combustion chamber.

Safety Controls

• Your unit is equipped with anautomatic reset safety limit control to
prevent overheating.When this control opens, it shuts down the
heating electrical circuit until theunit cools down sufficiently.
Inadequate airflow (i.e., caused bydirty filters or defective fan motor)
maycause theunit tocycle onand offas thelimit tripsand automatically
resets. If you suspect thatthe unit is cycling on its limit control,
immediately contact a service personfor instructions.

• If flames from the burner are not properly drawninto the heat
exchanger, aFlame Rollout Protection Control will open causing the
furnace to shut off.The cause mustbe investigated by a qualified
service person.

• If installed, the condensate overflow switch willshut down the unit
before a drain pan overflowoccurs.