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9

Figure 3

WARNING

CARBON MONOXIDE POISONING HAZARD

Failure to follow the steps outlined below for each appliance 

connected to the venting system being placed into operation 

could result in carbon monoxide poisoning or death.

The following steps shall be followed with each appliance 

connected to the venting system placed in operation, while any 

other appliances connected to the venting system are not in 

operation:

1.  Seal any unused openings in the venting system.

2. Inspect the venting system for proper size and horizontal 

pitch, as required by the National Fuel Gas Code, ANSI Z223.1 or 

the Natural Gas and Propane Installation Code,  

CSA B149.1-15 and these instructions. Determine that there is no 

blockage or restriction, leakage, corrosion and other deficien

-

cies which could cause an unsafe condition.

3. As far as practical, close all building doors and windows and 

all doors between the space in which the appliance(s) connect

-

ed to the venting system are located and other spaces of the 

building.

4.  Close fireplace dampers.

5. Turn on clothes dryers and any appliance not connected to 

the venting system. Turn on any exhaust fans, such as range 

hoods and bathroom exhausts, so they shall operate at maxi

-

mum speed. Do not operate a summer exhaust fan.

6.  Follow the lighting instructions. Place the appliance being 

inspected in operation. Adjust thermostat so appliance shall 

operate continuously.

7.  Test for spillage from draft hood appliances at the draft hood 

relief opening after 5 minutes of main burner operation. Use the 

flame of a match or candle.

8.  If improper venting is observed during any of the above tests, 

the venting system must be corrected in accordance with the 

National Fuel Gas Code ANSI Z223.1/NFPA 54 and/or National 

Gas and Propane Installation Code CSA B149.1-15.

9.  After it has been determined that each appliance connected 

to the venting system properly vents when tested as outlined 

above, return doors, windows, exhaust fans, fireplace dampers 

and any other gas burning appliance to their previous  

conditions of use.

AVERTISSEMENT

RISQUE D’INTOXICATION AU MONOXYDE DE  

CARBONE

Si les étapes décrites ci-dessous ne sont pas suivies pour 

chacun des appareils raccordés au système de ventilation au 

moment de sa mise en marche, cela peut entraîner une intoxica

-

tion au monoxyde de carbone ou la mort. Les étapes suivantes 

doivent être suivies pour chacun des appareils raccordés au 

système de ventilation au moment de sa mise en marche, alors 

que tous les autres appareils raccordés au système de ventila

-

tion ne sont pas en marche :

1) Sceller toutes les ouvertures inutilisées du système de  

ventilation.

2) Inspecter le système de ventilation afin de vérifier si la taille 

et l’inclinaison par rapport à l’horizontale sont conformes aux 

exigences du National Fuel Gas Code, ANSI Z223.1/NFPA 54 ou 

du Code d’installation du gaz naturel et du propane, CSA B149.1 

et à ces instructions. Vérifier qu’il n’y a pas d’obstruction ou 

de restriction, de fuite, de corrosion et d’autres problèmes qui 

pourraient entraîner une situation dangereuse.

3) Si possible, fermer toutes les portes et fenêtres du bâtiment 

ainsi que toutes les portes séparant l’endroit où se trouvent 

les appareils raccordés au système de ventilation et les autres 

zones du bâtiment.

4) Fermer le registre des foyers.

5) Mettre les sécheuses en marche ainsi que tous les autres 

appareils qui ne sont pas raccordés au système de ventilation. 

Mettre en marche tous les ventilateurs de tirage, comme celui 

des hottes de cuisine et des salles de bains, et les régler à la 

puissance maximale. Ne pas mettre en marche les ventilateurs 

d’été.

6) Suivre les instructions d’allumage. Mettre en marche l’appa

-

reil soumis à l’inspection. Régler le thermostat de manière à ce 

que l’appareil fonctionne en continu.

7) Vérifier la présence de fuite au niveau de l’ouverture du 

coupe-tirage des appareils qui en sont dotés après 5 minutes 

de fonctionnement du brûleur principal. Utiliser la flamme d’une 

allumette ou d’une bougie.

8) Si un problème de ventilation est observé pendant l’un des 

essais décrits ci-dessus, des correctifs doivent être apportés 

au système de ventilation conformément au National Fuel Gas 

Code, ANSI Z223.1/NFPA 54 et (ou) au Code d’installation du gaz 

naturel et du propane, CSA B149.1.

9) Une fois qu’il a été déterminé que chaque appareil raccordé 

au système de ventilation fonctionne correctement au moyen 

des essais décrits ci-dessus, les portes, les fenêtres, les ven

-

tilateurs, les registres de foyer et tous les autres appareils de 

combustion alimentés au gaz doivent être remis dans leur état 

initial.  

Front Cover Pressure Switch Tube Location

When a furnace is installed horizontally with left side down, 

the front cover pressure switch tube must be re-located to 

the lower port of the collector box cover.

1.  Remove tube from front cover pressure switch and 

collector box cover.

2.  Remove rubber plug from bottom collector box port 

and install on top collector box port.

3.  Locate 24” x 1/4” tube in bag assembly.

4.  Install one end on front cover pressure switch.

5.  Route tube to lower port on collector box cover and 

cut off excess tubing.

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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