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3

Never test for gas leaks with an open flame. Use a com

-

mercially available soap solution made specifically for the 

detection of leaks to check all connections, as specified in 

GAS SUPPLY AND PIPING

 section of this manual.

Always install a furnace to operate within the furnace’s 

intended temperature-rise range with a duct system which 

has external static pressure within the allowable range, as 

specified on the furnace rating plate and 

OPERATIONAL 

CHECKS

 

section

 of these instructions.

When a furnace is installed so that supply ducts carry air cir

-

culated by the furnace to areas outside the space containing 

the furnace, the return air shall also be handled by duct(s) 

sealed  to  the  furnace  casing  and  terminating  outside  the 

space containing the furnace.
A gas-fired furnace for installation in a residential garage must 

be installed as specified in the 

LOCATION REQUIREMENTS 

AND CONSIDERATIONS

 

section

 of this manual.

This  furnace  cannot  be  used  as  a  construction  site 

heater.

FROZEN AND BURST WATER PIPE HAZARD

F

AILURE

 

TO

 

PROTECT

 

AGAINST

 

THE

 

RISK

 

OF

 

FREEZING

 

MAY

 

RESULT

 

IN

 

PROPERTY

 

DAMAGE

.

S

PECIAL

 

PRECAUTIONS

 MUST 

BE

 

MADE

 

IF

 

INSTALLING

 

FURNACE

 

IN

 

AN

 

AREA

 

WHICH

  

MAY

 

DROP

 

BELOW

 

FREEZING

. T

HIS

 

CAN

 

CAUSE

 

IMPROPER

 

OPERATION

 

OR

 

DAMAGE

 

TO

 

EQUIPMENT

.  I

F

 

THE

 

FURNACE

 

ENVIRONMENT

 

HAS

 

THE

 

POTENTIAL

 

OF

 

FREEZING

THE

 

DRAIN

 

TRAP

 

AND

 

DRAIN

 

LINE

 

MUST

 

BE

 

PROTECTED

. T

HE

 

USE

 

OF

 

ACCESSORY

 

DRAIN

 

TRAP

 

HEATERS

ELECTRIC

 

HEAT

 

TAPE

 

AND

/

OR

 RV 

ANTIFREEZE

 

IS

 

RECOMMENDED

 

FOR

 

THESE

 

INSTALLATIONS

.

CAUTION

T

O

 

PREVENT

 

PERSONAL

 

INJURY

 

OR

 

DEATH

 

DUE

 

TO

 

IMPROPER

 

INSTALLATION

ADJUSTMENT

ALTERATION

SERVICE

 

OR

 

MAINTENANCE

REFER

 

TO

 

THIS

 

MANUAL

. F

OR

 

ADDITIONAL

 

ASSISTANCE

 

OR

 

INFORMATION

CONSULT

 

A

 

QUALIFIED

 

INSTALLER

SERVICER

 

AGENCY

 

OR

 

THE

 

GAS

 

SUPPLIER

.

WARNING

T

HIS

 

PRODUCT

 

CONTAINS

 

OR

 

PRODUCES

 

A

 

CHEMICAL

 

OR

 

CHEMICALS

 

WHICH

 

MAY

 

CAUSE

 

SERIOUS

 

ILLNESS

 

OR

 

DEATH

 

AND

 

WHICH

 

ARE

 

KNOWN

 

TO

 

THE

 S

TATE

 

OF

 C

ALIFORNIA

 

TO

 

CAUSE

 

CANCER

BIRTH

 

DEFECTS

 

OR

 

OTHER

 

REPRODUCTIVE

 

HARM

.

WARNING

T

O

 

PREVENT

 

POSSIBLE

 

PROPERTY

 

DAMAGE

PERSONAL

 

INJURY

 

OR

 

DEATH

 

DUE

 

TO

 

ELECTRICAL

 

SHOCK

THE

 

FURNACE

 

MUST

 

BE

 

LOCATED

 

TO

 

PROTECT

 

THE

 

ELECTRICAL

 

COMPONENTS

 

FROM

 

WATER

.

WARNING

Drain trap must be primed at time of installation.  Trap is 

internally partitioned; add water to both inlet ports until water 

appears at both sides of the outlet opening. Failure to prime 

trap  at  time  of  installation  may  have  a  negative  effect  on 

combustion quality and pressure switch action.

WARNING

FIRE OR EXPLOSION HAZARD

Failue to follow safety warnings exactly could re

-

sult in serious injury, death or property damage.

—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:

•Evacuate all persons from the vehicle.

•Shut off the gas supply at the gas container or source.

•Do not touch any electrical switch, or use any phone or radio in  

the vehicle.

•Do not start the vehicle’s engine or electric generator.

•Contact the nearest gas supplier or qualified service technician 

for repairs.

•If you cannot reach a gas supplier or qualified service techni

-

cian, contact the nearest fire department.

•Do not turn on the gas supply until the gas leak(s) has been 

repaired.

—Installation and service must be performed by a qualified 

installer, service agency or the gas supplier.

AVERTISSEMENT

RISQUE D’INCENDIE OU D’EXPLOSION

Si les consignes de sécurité ne sont pas suivies à la 

lettre,cela peut entraîner la mort, de graves blessures ou 

des dommages matériels.

— Ne pas entreposer ni utiliser d’essence ni autres vapeurs

ou liquides inflammables à proximité de cet appareil ou

de tout autre appareil.

— QUE FAIRE SI UNE ODEUR DE GAZ EST DÉTECTÉE

• Ne mettre en marche aucun appareil.

• Ne toucher aucun interrupteur électrique; ne pas utiliser

de téléphone dans le bâtiment.

• Quitter le bâtiment immédiatement.

• Appeler immédiatement le fournisseur de gaz en

utilisant le téléphone d’un voisin. Suivre les instructions

du fournisseur de gaz.

• Si le fournisseur de gaz n’est pas accessible, appeler le

service d’incendie.

— L’installation et l’entretien doivent être effectués par un

installateur ou une entreprise d’entretien qualifié, ou le

fournisseur de gaz.

H

EATING

 

UNIT

 

SHOULD

 

NOT

 

BE

 

UTILIZED

 

WITHOUT

 

REASONABLE

ROUTINE

INSPECTION

MAINTENANCE

 

AND

 

SUPERVISION

. I

F

 

THE

 

BUILDING

 

IN

 

WHICH

 

ANY

 

SUCH

 

DEVICE

 

IS

 

LOCATED

 

WILL

 

BE

 

VACANT

CARE

 

SHOULD

 

BE

 

TAKEN

 

THAT

 

SUCH

 

DEVICE

 

IS

 

ROUTINELY

 

INSPECTED

MAINTAINED

 

AND

 

MONITORED

IN

 

THE

 

EVENT

 

THAT

 

THE

 

BUILDING

 

MAYBE

 

EXPOSED

 

TO

 

FREEZING

 

TEMPERATURES

 

AND

 

WILL

 

BE

 

VACANT

ALL

 

WATER

-

BEARING

 

PIPES

 

SHOULD

 

BE

 

DRAINED

THE

 

BUILDING

 

SHOULD

 

BE

 

PROPERLY

 

WINTERIZED

AND

 

THE

 

WATER

 

SOURCE

 

CLOSED

IN

 

THE

 

EVENT

 

THAT

 

THE

 

BUILDING

 

MAY

 

BE

 

EXPOSED

 

TO

 

FREEZING

 

TEMPERATURES

 

AND

 

WILL

 

BE

 

VACANT

ANY

 

HYDRONIC

 

COIL

 

UNITS

 

SHOULD

 

BE

 

DRAINED

 

AS

 

WELL

 

AND

IN

 

SUCH

 

CASE

ALTERNATIVE

 

HEAT

 

SOURCES

 

SHOULD

 

BE

 

UTILIZED

.

WARNING

Summary of Contents for MES96 U Series

Page 1: ...R SERVICE PROCEDURES IF YOU SERVICE THIS UNIT YOU ASSUME RESPONSIBILITY FOR ANY INJURY OR PROPERTY DAMAGE WHICH MAY RESULT IN ADDITION IN JURISDICTIONS THAT REQUIRE ONE OR MORE LICENSES TO SERVICE THE...

Page 2: ...Air Opening Upflow Models 24 Filters Read This Section Before Installing The Return Air Duct work 24 Upright Installations 25 Horizontal Installations 25 Drain Trap Priming 25 Furnace Operation 25 Ga...

Page 3: ...me trap at time of installation may have a negative effect on combustion quality and pressure switch action WARNING FIRE OR EXPLOSION HAZARD Failue to follow safety warnings exactly could re sult in s...

Page 4: ...d other discounts or reductions Copy of the inspection report issued by carrier s representative at the time damage is reported to carrier Electrostatic Discharge ESD Precautions NOTE Discharge your b...

Page 5: ...n instructions provided and per local and national codes It must be installed indoors in a building constructed on site It must be part of a ducted system and not used in a free air delivery applicati...

Page 6: ...eater POSSIBLE PROPERTY DAMAGE PERSONAL INJURY OR DEATH DUE TO FIRE EXPLOSION SMOKE SOOT CONDENSATION ELECTRICAL SHOCK OR CARBON MONOXIDE MAY RESULT FROM IMPROPER INSTALLATION REPAIR OPERATION OR MAIN...

Page 7: ...Seal any unused openings in the venting system 2 Inspect the venting system for proper size and horizon tal pitch as required by the National Fuel Gas Code ANSI Z223 1 instructions Determine that ther...

Page 8: ...ization can cause back drafting or improper combustion of gas fired appliances thereby exposing building occupantstogascombustionproductsthatcouldincludecarbon monoxide If this furnace is to be instal...

Page 9: ...en marche alors que tous les autres appareils raccord s au syst me de ventila tion ne sont pas en marche 1 Sceller toutes les ouvertures inutilis es du syst me de ventilation 2 Inspecter le syst me d...

Page 10: ...onally the appropriate downward piping slope must be maintained from the drain trap to the drain location Refer to Condensate Drain Trap and Lines for further details If the drain trap and drain line...

Page 11: ...A masonry chimney may be used as a chase or passage way for approved venting materials providing the masonry chimney is not also being used to vent products of combustion Never common vent this appli...

Page 12: ...Lengths shown in table 3 apply to single pipe two pipe installations In a two pipe installation do not add intake and vent pipe lengths together Both pipes would normally be equal in length if differ...

Page 13: ...ng the horizontal alternate vent configuration you must use the RF000142 vent drain kit See Figures 10 11 follow steps below NOTE In the horizontal left installation position a means of condensate col...

Page 14: ...rect vent application must terminate at least 12 from any opening through which flue gases may enter a building door window or gravity air inlet The vent termination of vent pipe run vertically throug...

Page 15: ...HEIGHT DIFFERENCE 12 MIN TO ROOF OR HIGHEST ANTICIPATED SNOW LEVEL Figure 14 Vertical Termination STRAIGHT ELBOWS Figure 15 VENT FLUE TEE or 45 ELBOW TURNED DOWN or 90 ELBOW TURNED DOWN OPTIONAL 12 M...

Page 16: ...swiththeexhaustventandairintaketerminations of a single unit If more than one direct vent furnace is to be installed horizontally through a common side wall maintain the clearances as in the following...

Page 17: ...Drain Trap A condensing gas furnace achieves its high level of efficiency by extractingheatfromtheproductsofcombustiontothepointwhere condensation takes place The condensate must be collected in the f...

Page 18: ...barbed end goes in the cabinet through the hole in the left side of the cabinet and secure with two field supplied 8 self tapping screws see Figure 24 2 Locate the long drain hose 3 and cut at B line...

Page 19: ...rip leg port must be sealed to prevent flue gases from escaping Insert the rubber plug removed in step 6 into the unused elbow drain port Inserting a blunt tool such as a 3 16 Allen wrench into the ce...

Page 20: ...ctrical circuit containing prop erly sized wire and fuse or circuit breaker The fuse or circuit breaker must be sized in accordance with the maximum overcurrent protection specified on the unit rating...

Page 21: ...ERSONAL INJURY OR DEATH MAY OCCUR IF THE CORRECT CONVERSION KITS ARE NOT INSTALLED THE APPROPRIATE KITS MUST BE APPLIED TO ENSURE SAFE AND PROPER FURNACE OPERATION ALL CONVERSIONS MUST BE PERFORMED BY...

Page 22: ...rning The orientation of the gas valve on the manifold must be maintained as shipped from the factory Maximum torque for the gas valve connection is 375 in lbs excessive over tightening may damage the...

Page 23: ...ressures in excess of psig 3 48 kPa Isolate this unit from the gas supply piping system by closing its external manual gas shutoff valve before pressure testing supply piping system with test pressure...

Page 24: ...e cor ners of the opening cut the sheet metal along the scribe lines to free the duct flanges Using the scribe line along the duct flange as a guide unfold the duct flanges around the perimeter of the...

Page 25: ...MUST BE AS SPECIFIED ON THE UNIT RATING PLATE WITH ALL OTHER HOUSEHOLD GAS FIRED APPLIANCES OPERATING Furnace Startup 1 Closethemanualgasshutoffvalveexternaltothefurnace 2 Turn off the electrical powe...

Page 26: ...ure regulator gas piping size etc and or consult with local gas utility 5 Turn OFF gas to furnace at the manual shutoff valve and disconnect manometer Reinstall plug and tighten as needed before turni...

Page 27: ...essure cannot vary by more than 0 2 w c for Natural gas from the specified setting Consult your local gas supplier if additional input rate adjustment is required 4 Turn ON gas to and relight all othe...

Page 28: ...ule performs internal checks LED will flash once at power up then remain on Integrated control module monitors safety circuits continuously Furnace awaits call from thermostat Heating Mode The normal...

Page 29: ...osed electrically auto reset sensor This switch guards against the burner flames not being properly drawn into the heat exchanger Pressure Switches The pressure switches are normally open closed durin...

Page 30: ...ol will return to lockout Refer to the Troubleshooting Chart for aid in determining the cause Field Test Mode Function When the SW1 button is pressed and held until the LED is blinking in AMBER more t...

Page 31: ...ly Annually inspect the drain tubes drain trap and field sup plied drain line for proper condensate drainage Check drain system for hose connection tightness blockage and leaks Clean or repair as nece...

Page 32: ...Open RED When an open limit is detected the control energizes the blower at cooling speed and the inducer at the RUN setting no CFH required Once the limit closes and the CFH is present the furnace r...

Page 33: ...Press and hold the SW1 button for more than 5 seconds results in the display of this mode Releasing the Button during this indication will cause the Error History to be cleared The button must be rel...

Page 34: ...CFM Rise CFM CFM CFM Red High Cool 3 1350 NA 1310 NA 1273 NA 1234 NA 1198 NA 1156 1117 1078 Blue Med Hi Heat 2 5 1247 29 1212 30 1167 31 1129 32 1087 33 1043 997 952 Brown Med Low 2 1151 31 1107 32 1...

Page 35: ...ore servicing or installing this unit Multiple power sources may be present Failure to do so may cause property damage personal injury or death Wiring is subject to change Always refer to the wiring d...

Page 36: ...a relatively short process and entitles you to additional warranty protection except that failure by California and Quebec residents to register their product does not diminsh their warranty rights Fo...

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