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13

TRANSITION NO LESS 

THAN 45 DEGREES TO 

HORIZONTAL PLANE TO 

AVOID CREATING A WATER 

TRAP IN VENT PIPING.

ACCEPTABLE

Figure 5

NO TRANSITION ON 

HORIZONTAL PLANE, 

THIS CREATES A 

WATER TRAP AND 

RESTRICTS FLUE 

GASES

Figure 6

  

Piping must be adequately secured and supported to 

prohibit sagging, joint separation, and/or detachment from 

the  furnace.  Horizontal  runs  of  vent/flue  piping  must  be 

supported every three to five feet and must maintain a ¼ 

inch per foot downward slope, back towards the furnace, to 

properly  return  condensate  to  the  furnace’s  drain  system.  

Allowances  should  be  made  for  minor  expansion  and 

contraction due to temperature variations. For this reason, 

particular care must be taken to secure piping when a long 

run is followed by a short offset of less than 40 inches.

Precautions should be taken to prevent condensate from 

freezing  inside  the  vent/flue  pipe  and/or  at  the  vent/flue 

pipe  termination.  All  vent/flue  piping  exposed  to  freezing 

temperatures below 35°F for extended periods of time must 

be insulated with ½” thick closed cell foam.  Also all vent/flue 

piping exposed outdoors in excess of the terminations shown 

in this manual (or in unheated areas) must be insulated with 

½” thick closed cell foam. Inspect piping for leaks prior to 

installing insulation.

Termination Locations

NOTE:

  Refer to 

Location Requirements and Considerations 

for combustion air contaminant restrictions.

The following bullets and diagram describe the restrictions 

concerning  the  appropriate  location  of  vent/flue  pipe  and 

combustion air intake pipe (when applicable) terminations.  

Refer to 

Non-Direct  Vent  (Single  Pipe)  Piping  and  Direct 

Vent (Dual Pipe) Piping

 located in this section for specific 

details on termination construction.

• 

  All terminations (flue and/or intake) must be located at 

least 12 inches above ground level or the anticipated 

snow level.

•   Vent terminations (non-direct and direct vent) must 

terminate at least 3 feet above any forced air inlet 

located within 10 feet.

NOTE:

 This provision does not apply to the 

combustion air intake termination of a direct vent 

application.

•   The vent termination of a non-direct vent application 

must terminate at least 4 feet below, 4 feet 

horizontally from, or 1 foot above any door, window, or 

gravity air inlet into any building.

•   The vent termination of a direct vent application must 

terminate at least 12 inches 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 

through a roof must terminate at least 12 inches 

above the roof line (or the anticipated snow level) and 

be at least 12 inches from any vertical wall (including 

any anticipated snow build up).

•   A vent termination shall not terminate over public 

walkways or over an area where condensate or 

vapor could create a nuisance or hazard or could 

be detrimental to the operation of regulators, relief 

valves, or other equipment.

•   The combustion air intake termination of a direct vent 

application should not terminate in an area which is 

frequently dusty or dirty.

NOTE:

  In Canada, the current edition of CAN/CSA B149.1-

15 takes precedence over the preceding termination 

restrictions.

12"

Non-Direct Vent

Vent/Flue Termination

No Terminations

 Above Walkway

12"

min.

4'

min.

Non-Direct Vent

Vent/Flue Termination

Direct Vent

Vent/Flue Termination

<10'

Forced Air

Inlet

Non-Direct Vent

&

Direct Vent

Vent/Flue Terminations

Grade or Highest

 Anticipated 

Snow Level

3' min.

12" min.

4' min.

12" min.

Vent Termination Clearances

Figure 7

Canadian Vent Pipe & Combustion 

Air Pipe Requirements

All installations in Canada must conform to the requirements 

of CAN/CSA B149.1-15 code. All vent components, including 

primer and cement, must be listed to ULC S636. The certified 

pipe  and  fittings  should  be  clearly  marked  with  the  ULC 

Summary of Contents for DM92SS

Page 1: ...THIS SYMBOL AS A SAFETY PRECAUTION TABLE OF CONTENTS Safety Considerations 3 Shipping Inspection 4 Electrostatic Discharge ESD Precautions 5 To The Installer 5 Product Application 5 Location Requirem...

Page 2: ...26 High Altitude Derate 26 Propane Gas Conversion 26 Gas Piping Connections 26 Gas Piping Checks 29 Propane Gas Tanks and Piping 29 Circulating Air Filters 29 Duct work Air Flow 29 Checking Duct Stati...

Page 3: ...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 may be used as a construc...

Page 4: ...electrical shock the furnace must be located to protect the electrical components from water Drain trap must be primed at time of installation Trap is internally partitioned add water to both inlet po...

Page 5: ...ith static electricity i e do not move or shuffle your feet do not touch ungrounded objects etc If you come in contact with an ungrounded object repeat step 2 before touching control or wires 4 Discha...

Page 6: ...and the service area around the unit must have flooring To ensure proper furnace operation install operate and maintain the furnace in accordance with these installation and operation instructions al...

Page 7: ...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 u...

Page 8: ...nting system may be too large to properly vent the remaining attached appliances POSITION SIDES REAR FRONT BOTTOM FLUE TOP Upflow 0 0 3 C 0 1 Horizontal 6 0 3 C 0 6 C If placed on combustible floor fl...

Page 9: ...ant l un des essais d crits ci dessus des correctifs doivent tre apport s au syst me de ventilation conform ment au National Fuel Gas Code ANSI Z223 1 NFPA 54 et ou au Code d installation du gaz natur...

Page 10: ...tal counterflow furnaces return ductwork must be attached to the basepan top end of the blower compartment NOTE Ductwork must never be attached to the back of the furnace Contact your distributor for...

Page 11: ...gy content difference between natural and propane gas High Stage Low Stage Natural None 45 3 5 w c 1 9 w c None Propane LPM 07 1 1 25mm 10 0 w c 6 0 w c None Gas Altitude Kit Orifice Manifold Pressure...

Page 12: ...aterials and Joining Methods Two three inch nominal diameter PVC Schedule 40 pipe meeting ASTM D1785 PVC primer meeting ASTM F656 and PVC solvent cement meeting ASTM D2564 specifications must be used...

Page 13: ...es above ground level or the anticipated snow level Vent terminations non direct and direct vent must terminate at least 3 feet above any forced air inlet located within 10 feet NOTE This provision do...

Page 14: ...pipe Secure vent flue pipe directly into the furnace fitting with the appropriate glue Alternately a small section of 2 pipe may be glued in the furnace socket and a rubber coupling installed to allow...

Page 15: ...er outlet 5 Install cut end of the flanged section and connect to inducer with rubber coupling supplied with furnace Install screws removed in step 1 securing flange to cabinet MODEL PIPE SIZE 1 2 3 4...

Page 16: ...per material manufacturers specifications to prevent separation and flue gas leaks Figure 11 Insert flange Cut 2 long R 000142 F Figure 9 CUT HERE Figure 10 Vent Flue Pipe Cuts Upflow Horizontal model...

Page 17: ...secured to the combustion air intake to prevent inadvertent blockage The tee used in the vent flue termination must be included when determining the number of elbows in the piping system Vent Flue Pi...

Page 18: ...r specific details on termination construction For details concerning connection of pipes to the furnace refer to the Vent Flue Pipe and Combustion Pipe Standard Furnace Connections or Alternate Furna...

Page 19: ...ecifications Condensate Drain Lines Drain Trap Acondensing gas furnace achieves its high level of efficiency by extracting heat from the products of combustion to the point where condensation takes pl...

Page 20: ...ay be added in the area shown in Figure 21 Any unused cabinet opening must be sealed Do not allow drain hose to sag or trap water Figure 21 Drain Exiting Right Side 1 Locate and Install the 45 pipe ho...

Page 21: ...the top mounting tabs of the trap into the two predrilled holes in the side of the cabinet 9 Refer to Field Supplied Drain section for instructions on field supplied installed drain on outlet of furn...

Page 22: ...he non grommet end Discard the section without the grommet 5 Insert the cut end of tube 5 through the lower cabinet drain hole 6 Insert 100 degree elbow in the cut end of hose 5 7 Locate hose 6 Using...

Page 23: ...ses needed for installation and install per the following directions 1 Remove the drain trap and factory installed drain tube assemblies 2 Remove two 1 plugs from right side of cabinet 3 Draining the...

Page 24: ...n hole 12 Insert 100 elbow in hose 5 and secure with a red clamp 13 Locate hose 4 and cut a cut off a 4 straight section and discard the radius end 14 Connect the 4 straight section of hose 4 to the 1...

Page 25: ...low NOTE Wire routing must not to interfere with circulator blower operation filter removal or routine maintenance Junction Box Relocation WARNING HIGH VOLTAGE To avoid personal injury or death due to...

Page 26: ...t not be exceeded to prevent unit overfiring High Altitude Derate When this furnace is installed at high altitude the appropriate High Altitude orifice kit must be applied This is required due to the...

Page 27: ...1 8 NPT pipe plug fitting accessible for test gauge connection immediately upstream of the gas supply connection to the furnace Always use a back up wrench when making the connection to the gas valve...

Page 28: ...ation Gas Valve Burners Manual Shut Off Valve upstream from ground joint pipe union Drip Leg Grommet in Standard Gas Line Hole Ground Joint Pipe Union Ground Joint Pipe Union NOTE Union may be inside...

Page 29: ...de NSCNGPIC CAN CSA B149 1 15 For satisfactory operation propane gas pressure must be 10 WC at the furnace manifold with all gas appliances in operation Maintaining proper gas pressure depends on thre...

Page 30: ...an air conditioner coil or Electronic Air Cleaner is used in conjunction with the furnace the readings must also include theses components as shown in the following drawing 4 Consult proper tables for...

Page 31: ...e furnace The installation of a centrally installed air cleaner cabinet or a return duct filter installation may offer more practicality Clean Comfort brand MERV 11 air cleaners have 5 media filters a...

Page 32: ...t angle 2000 CFM 20 in X 25 in x 5 AM11 2025 5RA AM11 5RA Bottom return platform 2000 CFM 20 in X 25 in x 5 AM11 2832 5PP Bottom return platform 2000 CFM 20 in X 25 in x 5 AM11 2843 5PP AM11 5 2 X 160...

Page 33: ...ances on the same gas supply line 4 Measure furnace gas supply pressure with burners firing Supply pressure must be within the range specified in the Inlet Gas Supply Pressure table If supply pressure...

Page 34: ...pplier if additional input rate adjustment is required 4 Turn ON gas to and relight all other appliances turned off in step 1 Be certain that all appliances are functioning properly and that all pilot...

Page 35: ...als 4 Connect all unused blower motor leads to the PARK terminals on the integrated control module Any leads not connected to the PARK terminals must be taped 5 Turn ON power to furnace 6 Verify prope...

Page 36: ...heat exchanger compartment temperatures It is a normally closed electrically automatic reset temperature activated sensor The limit guards against overheating as a result of insufficient conditioned...

Page 37: ...following a one hour lockout period 2 Manual power interruption Interrupt 115 volt power to the furnace 3 Manual thermostat cycle Lower the thermostat so that there is no longer a call for heat for 1...

Page 38: ...condensate drainage Check drain system for hose connection tightness blockage and leaks Clean or repair as necessary Flame Sensor Qualified Servicer Only Under some conditions the fuel or air supply c...

Page 39: ...Loose or improperly connected wiring Pressure switch circuit not closed Induced draft blower isoperating Induced draft blower runs continuously with no further furnace operation Integrated control mo...

Page 40: ...peration Rollout limit open Integrated control module fuse is blown Check burners for proper alignment Check flue and air inlet piping for blockage proper length elbows and termination Correct as nece...

Page 41: ...N A 1203 N A 1158 N A 1111 1058 932 HIGH 5 0 2235 38 2166 39 2110 40 2021 42 1956 44 1855 1740 1618 MED 4 0 1955 44 1921 44 1860 46 1808 47 1746 49 1645 1572 1461 MED LO 3 5 1658 51 1634 52 1590 54 15...

Page 42: ...OX 1 TO115 VAC 1 60HZ OR ID BLOWER PRESSURE SWITCH HEAT H GND WH RD WH GND BURNER COMPARTMENT BLOWER COMPARTMENT N O COOL H BK HI BR BR CAPACITOR YL WH CONTROL PRIMARY LIMIT AUTO RESET BL PU MANUAL RE...

Page 43: ...nimum height of eight 8 feet above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heating appliance or equipment The sign shall read in print size no less...

Page 44: ...se DB F Delta T Difference between Supply and Return Temperatures DB F GAS PRESSURES Gas Inlet Pressure IN W C Gas Manifold Pressure Low Fire IN W C Gas Manifold Pressure High Fire IN W C Gas Type NG...

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Page 47: ...47 THIS PAGE IS LEFT INTENTIONALLY BLANK...

Page 48: ...e protec on of the standard warranty registering your product is a rela vely short process and en tles you to addi onal warranty protec on except that failure by California and Quebec residents to reg...

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