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   Varnishes

 

  Hydrochloric acid

 

  Cements and glues

 

  Antistatic fabric softeners for clothes dryers

 

  Masonry acid washing materials

• 

Seal off a 

non-direct vent

 furnace if it is installed 

near  an  area  frequently  contaminated  by  any  of 

the  above  substances.    This  protects  the 

non-

direct vent

 furnace from airborne contaminants.  To 

ensure  that  the  enclosed 

non-direct

 

vent

 furnace 

has  an  adequate  supply  of  combustion  air,  vent 

from  a  nearby  uncontaminated  room  or  from 

outdoors.  Refer to the 

Combustion and Ventilation 

Air Requirements

 for details.

• 

If the furnace is used in connection with a cooling coil 

unit, install the furnace upstream or in parallel with the 

cooling coil unit.  Premature heat exchanger failure will 

result if the cooling unit is placed ahead of the furnace.

 

For  vertical  (upflow)  applications,  the  minimum 

cooling  coil  width  shall  not  be  less  than  furnace 

width minus 1”.  Additionally, a coil installed above 

an upflow furnace may be the same width as the 

furnace or may be one size larger than the furnace.  

Example: a “C” width coil may be installed with a “B” 

width furnace.

 

For  upflow  applications,  the  front  of  the  coil  and 

furnace must face the same direction.

• 

If  the  furnace  is  installed  in  a  residential  garage, 

position the furnace so that the burners and ignition 

source  are  located  not  less  than  18”  above  the 

floor.  Protect the furnace from physical damage by 

vehicles.

• 

If  the  furnace  is  installed  horizontally,  ensure  the 

access  doors  are  not  on  the  “up/top”  or  “down/

bottom” side of the furnace.

• 

Do not connect this furnace to a chimney flue that 

serves a separate appliance designed to burn solid 

fuel.

Clearances and Accessibility

Clearance in accordance with local installation codes, the 

requirements of the gas supplier and the manufacturer’s 

installation instructions.

Dégaugement conforme aux dodes d’installation locaux, 

aux exigences du fournisseur de gaz et aux instructions 

d’installation du fabricant.

NOTES:

• 

For servicing or cleaning, a 24” front clearance is 

required.

• 

Unit connections (electrical, flue and drain) may 

necessitate greater clearances than the minimum 

clearances listed above.

• 

In all cases, accessibility clearance must take 

precedence over clearances from the enclosure 

where accessibility clearances are greater.

P

OSSIBLE

 

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

 

MAINTENANCE

 

OF

 

THIS

 

PRODUCT

.

WARNING

•  Centrally locate the furnace with respect to the 

proposed or existing air distribution system.

• 

Ensure the temperature of the return air entering the 

furnace is between 55°F and 100°F when the furnace 

is heating.

• 

Provide provisions for venting combustion products 

outdoors through a proper venting system.  Special 

consideration should be given to vent/flue pipe routing 

and  combustion  air  intake  pipe  when  applicable.  

Refer to 

Vent/Flue  Pipe  and  Combustion Air  Pipe 

-Termination Locations 

for appropriate termination 

locations and to determine if the piping system from 

furnace to termination can be accomplished within 

the guidelines given.  

NOTE:

  The length of flue and/

or combustion air piping can be a limiting factor in 

the location of the furnace. 

• 

Locate the furnace so condensate flows downwards 

to  the  drain.    Do  not  locate  the  furnace  or  its 

condensate drainage system in any area subject to 

below freezing temperatures without proper freeze 

protection.  Refer  to

  Condensate  Drain  Lines  and 

Trap

 for further details.

• 

Ensure adequate combustion air is available for the 

furnace.    Improper  or  insufficient  combustion  air 

can expose building occupants to gas combustion 

products that could include carbon monoxide.  Refer 

to 

 Combustion and Ventilation Air Requirements.

• 

Set the furnace on a level floor to enable proper 

condensate drainage.  If the floor becomes wet or 

damp at times, place the furnace above the floor on 

a concrete base sized approximately 1-1/2” larger 

than the base of the furnace.  Refer to the 

Horizontal 

Applications  and  Considerations

 for leveling of 

horizontal furnaces.

• 

Ensure upflow or horizontal furnaces are not installed 

directly on carpeting, or any other combustible material.  

The only combustible material allowed is wood.

• 

Exposure to contaminated combustion air will result 

in  safety  and  performance-related  problems.  Do 

not install the furnace where the combustion air is 

exposed to the following substances:  

 

 

  Permanent wave solutions

 

  Chlorinated waxes or cleaners chlorine-based

 

  Carbon tetrachloride

 

  Water softening chemicals

 

  Swimming pool chemicals

 

  Deicing salts or chemicals

 

  Halogen type refrigerants

 

  Printing inks

 

  Cleaning solutions (such as perchloroethylene)

 

  Paint removers

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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