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95.1% AFUE

Direct Vent (Sealed Combustion) Forced Air

CMF95 Series Downflow Condensing Gas Furnace

For Installation in:

•  Manufactured Homes
•  Recreational Vehicles, Park Models, & 

Manufactured Buildings

•  Modular Homes/Buildings

INSTALLATION INSTRUCTIONS

DO NOT DESTROY THIS MANUAL. KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.

FIRE OR EXPLOSION HAZARD

• Failure  to  follow  safety  warnings  exactly 

could  result  in  serious  injury  or  property 

damage.

• Installation and service must be performed 

by a qualified installer, service agency or the 
gas supplier.

• 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.

• Leave the building immediately.
• 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.

WARNING:

RISQUE D’INCENDIE OU D’ EXPLOSION

• Le  non-respect  des  avertissements  de 

sécurité  pourrait  entraîner  des  blessures 

graves, la mort ou des dommages matériels.

• L’installation  et  l’entretien  doivent  être 

effectués  par  un  installateur  qualifié,  un 

organisme  de  service  ou  le  fournisseur  de 

gazstaller, service agency or the gas supplier.

• Ne pas entreposer ni utiliser de l’essence ni 

d’autres  vapeurs  ou  liquides  inflammables 

dans le voisinage de cet appareil, ni de tout 
autre appareil.

QUE FAIRE S’IL Y A UNE ODEUR DE GAZ

• Ne pas tenter d’allumer aucun appareil.

• Ne toucher à aucun interrupteur électrique; 

n’utiliser aucun téléphone dans le bâtiment.

• Évacuer l’immeuble immédiatement.

• Appeler  immédiatement  le  fournisseur  de 

gaz en employant le téléphone d’un voisin. 

Respecter  à  la  lettre  les  instructions  du 

fournisseur de gaz.

• Si personne ne répond, appeler le service des 

incendies.

AVERTISSEMENT

Summary of Contents for CMF95 Series

Page 1: ...l 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 WARNING RISQUE D INCENDIE OU D EXPLOSION Le non respec...

Page 2: ...Base 13 MA 100 Universal Base Installation 14 Installing the Furnace on an MA 100 Base 15 Condensate Drainage 15 GAS SUPPLY PIPING 16 Leak Check 16 High Altitude Application 17 Converting to LP Propan...

Page 3: ...ersonal injury or death This furnace must be installed in accordance with these instructions all applicable local building codes and the current revision of the National Fuel Gas Code ANSI Z223 1 NFPA...

Page 4: ...uses the appliance orequipment Behard wired batterypoweredorboth ShallcomplywithNFPA720 2005Edition c A product approved vent terminal must be used andifapplicable aproduct approvedairintakemust be us...

Page 5: ...tworkshouldbeappropriatelysizedtothecapacity of the furnace to ensure its proper airflow rating For installations above 2 000 ft the furnace should have a sea level input rating large enough that it w...

Page 6: ...SSEMENT RISQUE D EMPOISONNEMENT AU MONOXYDE DE CARBONED Le non respect des consignes suivantes portant sur chacun des appareils raccord s au syst me d vacuation mis en service pourrait entra ner l emp...

Page 7: ...t be known When estimating the length of vent runs consideration must be made to the effect of elbows and other fittings This is conveniently handled using the idea of equivalent length Thismeansthefi...

Page 8: ...mination to windows and building air intakes Vent and combustion air intake terminations must be located to ensure proper furnace operation and conformance to applicable codes A vent terminal must be...

Page 9: ...hown in Figure 4 The roof penetration mustbeproperlyflashedandwaterproofedwithaplumbing roof boot or equivalent flashing Vent and combustion air piping may be installed in an existing chimney which is...

Page 10: ...I VentilAire IV Figure 5 VentilAire III IV Vent Freezing Protection CAUTION When the vent pipe is exposed to temperatures below freezing i e when it passes through unheated spaces chimneys etc the pip...

Page 11: ...vent leakage It is good practice to seal all connections and joints with industrial grade sealing tape or liquid sealant Requirements for sealing ducts vary from region to region Consult with local co...

Page 12: ...CAUTION HAZARD OF ASPHYXIATION DO NOT COVER OR RESTRICT FLOOR RETURN AIR OPENING or equivalent For closet installation with less than 6 front clearance but not less than 1 a louvered door must be used...

Page 13: ...fastenthefrontofthefurnace and the base to the floor with 8 x 1 2 sheet metal screws FURNACE INSTALLATION NOTE Sinceallinstallationsaredifferent thesequenceof these steps may differ from the actual in...

Page 14: ...opening and center the top of the feeder duct in 14 1 8 x 14 1 8 floor opening 5 Using the feeder duct as a guide mark and cut a 12 x 12 opening in the supply duct Remove the base and transition feede...

Page 15: ...will cause improper operation or damage to the furnace It is recommended that all drain lines on the outside of the residence be wrapped with an industry approved insulation or material allowed by loc...

Page 16: ...l gas hookups are shown in Figure 12 Leak Check FIRE OR EXPLOSION HAZARD Failure to follow safety warnings exactly could result in serious injury or property damage Installation and service must be pe...

Page 17: ...nstallation may only be accomplished withfactorysuppliedorifices Donotattemptto drill out orifices in the field Improperly drilled orifices may cause fire explosion carbon monoxide poisoning personal...

Page 18: ...ple Elevation 5 000 feet Type of Gas Natural Gas Local Heating Value of Gas 750 From Table 10 find 750 and follow down the column stop at the 5 000 feet row The heating value listed is LOW Table 12 wi...

Page 19: ...ten until snug Make sure LP is visible after conversion Gas Pressure Verification Measuring the Supply Gas Pressure 1 Turn OFF the gas supply at the manual valve located on the outside of the unit 2 U...

Page 20: ...are lit check all gas connections for leaks again with the soap and water solution Measuring the Manifold Pressure The manifold pressure must be measured by installing a pressure gauge Manometer Magn...

Page 21: ...tothefurnace nameplate or Table 4 An electrical disconnect must be installed readily accessiblefromandlocatedwithinsightofthefurnace See Figure 18 page 29 or the wiring diagram label inside of the con...

Page 22: ...otection2 045 45 000 18 115 60 1 127 103 11 0 14 20 13 1 21 7 072 72 000 18 115 60 1 127 103 10 4 14 20 12 4 20 4 NOTE Minimum wire gauge and maximum fuse circuit breaker amperage are based on MCA1 an...

Page 23: ...e input rate in Btuh See example 6 The manifold pressure must be set to the appropriate valueforeachinstallationbyaqualifiedinstaller service agency or the gas supplier WARNING Do not attempt to drill...

Page 24: ...nutes before taking any temperature readings The temperature rise is the difference between the supply and return air temperatures Verifying Burner Operation CAUTION The door over the burners may only...

Page 25: ...alve and inducer remains energized The control goes to blower on delay 8 If flame is present the control energizes the blower on theselectedHEATspeed30secondsafterthegasvalve opened The gas valve and...

Page 26: ...piping at the furnace 6 Remove the piping between the gas valve and the ground joint union If applicable 7 Remove the burner box door 6 screws 8 Remove 4 screws securing the manifold assembly to the b...

Page 27: ...Fault Flash On Open Limit Switch Fault Flash Off Motor Fault On Off Diagnostic Description Yellow LED Low Flame Sensor Signal Continuous Flash Flame Present On Table 6 Control Board Fault Conditions...

Page 28: ...8 1 3 8 1 5 8 24 3 16 4 3 4 2 7 8 1 3 4 1 3 4 16 1 2 13 5 8 3 1 2 X 1 1 2 Slots for Gas Pipe Condensate drains Typ FRONT VIEW LEFT SIDE TOP VIEW BOTTOM VIEW 3 3 4 Dia 2 Places 32 2 7 8 Dia Hole for Li...

Page 29: ...SINGLE STAGE THERMOSTAT TO OUTDOOR UNIT FIELD WIRING LEGEND LOW VOLTAGE HIGH VOLTAGE WIRING DIAGRAM For 80 and 90 Single Stage Furnaces Refer to the Installation Instructions provided with the furnac...

Page 30: ...ER REVOLUTION OF GAS METER 1 5 10 10 360 1 800 3 600 12 300 1 500 3 000 14 257 1 286 2 571 16 225 1 125 2 250 18 200 1 000 2 000 20 180 900 1 800 22 164 818 1 636 24 150 750 1 500 26 138 692 1 385 28...

Page 31: ...T BTU 45 000 72 000 0 to 1 999 FT 49 47 2 000 to 2 999 FT 50 48 3 000 to 3 999 FT 50 48 4 000 to 4 999 FT 51 48 5 000 to 5 999 FT 51 49 6 000 to 6 999 FT 51 49 7 000 to 7 999 FT 52 50 8 000 to 8 999 F...

Page 32: ...ls All Clearances in this Figure apply on both walls G Clearance to inside corner All Clearances in this Figure apply on both walls All Clearances in this Figure apply on both walls H Clearance to eac...

Page 33: ...ble Wall Normal Snow Level COMBUSTION AIR Seal Caulk Around Pipes at Building 90 Elbow 7 12 Min 90 Elbow 90 Elbow Support System on Vertical Rise FLUE PIPE COMBUSTION AIR See Table 2 for PVC Pipe Leng...

Page 34: ...34...

Page 35: ...35...

Page 36: ...efully before starting the installation Return these instructions to the customer s package for future reference PROPOSITION 65 WARNING This product contains chemicals known to the state of California...

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