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INSTALLATION INSTRUCTIONS

Installation Instructions 

for DM92SS & DC92SS

Single-Stage Gas Furnace

(Type FSP CATEGORY IV Direct or 

Non Direct Vent Air Furnace) (Type 

FSP CATÉGORIE IV Direct ou four

á air soufflé non direct)

IOD-2010O

08/2021

Our continuing commitment to quality products may mean a change in specifications without notice. 

©2014-2019,

 

2021 

19001 Kermier Rd. Waller, Tx 77484

www.daikincomfort.com

These  furnaces  comply  with  requirements 

embodied in the American National 

Standard / National Standard of Canada 

ANSI  Z21.47·CSA-2.3  Gas  Fired  Central 

Furnaces.

Installer: 

Affix all manuals

adjacent to the unit.

As a professional installer you have an obligation to know 

the product better than the customer. This includes all safety 

precautions and related items.

Prior to actual installation, thoroughly familiarize yourself with 

this  Instruction  Manual.  Pay  special  attention  to  all  safety 

warnings. Often during installation or repair it is possible to 

place yourself in a position which is more hazardous than 

when the unit is in operation.

Remember, it is your responsibility to install the product 

safely and to know it well enough to be able to instruct a 

customer in its safe use.

Safety is a matter of common sense...a matter of thinking 

before  acting.  Most  dealers  have  a  list  of  specific  good 

safety practices...follow them.

The precautions listed in this Installation Manual are intended 

as supplemental to existing practices. However, if there is a 

direct conflict between existing practices and the content of 

this manual, the precautions listed here take precedence.

RECOGNIZE 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 Requirements & Considerations ................

6

Clearances and Accessibility ..................................

7

Existing Furnace Removal ........................................

8

Thermostat Location ..................................................9

Combustion & Ventilation Air Requirements

............

9

Installation Positions .................................................

10

Horizontal Applications & Considerations .............

10

Furnace Suspension .................................................

10

Front Cover Pressure Switch Tube Location .....

10

Drain Trap and Lines ................................................

11

Leveling ......................................................................

11

Alternate Electrical and Gas Line 

Connections ...............................................................

11

Drain Pan ....................................................................

11

Freeze Protection ....................................................

11

Propane Gas/High Altitude Installations

................11

Vent/Flue Pipe & Combustion Air Pipe ......................

11

Dual Certification: Non-Direct/Direct Vent .......12

Materials and Joining Methods .............................12

Proper Vent/Flue and Combustion Air Piping 

Practices ....................................................................12

Termination Locations .............................................

13

Canadian Vent Pipe & Combustion Air Pipe 

Requirements .............................................................

13

Standard Furnace Connections

.............................14

Only personnel that have been trained to install, adjust, 

service or repair(hereinafter, “service”) the equipment 

specified in this manual should service the equipment.  

The manufacturer will not be responsible for any injury 

or property damage arising from improper service or 

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 equipment specified in this  

manual, only licensed personnel should service the 

equipment. Improper installation, adjustment, servicing 

or repair of the equipment specified in this manual, 

or attempting to install, adjust, service or repair the 

equipment specified in this manual without proper training 

may result in product damage, property damage, personal 

injury or death.

WARNING

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 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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