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441 01 2314 06

Specifications are subject  to change without notice.

3

1.  Safe Installation Requirements

FIRE, EXPLOSION, AND ASPHYXIATING HAZARD
Improper adjustment, alteration, service, 

maintenance or installation could cause death,

personal injury,  and/or property damage.
Installation or repairs made by unqualified

persons could result in hazards to you and others.

Installation MUST conform with local codes or, in

the absence of local codes, with codes of all

governmental authorities having jurisdiction.
The information contained in this manual is

intended for use by a qualified service agency that

is experienced in such work, is familiar with all

precautions and safety procedures required in

such work, and is equipped with the proper tools

and test instruments.

!

WARNING

NOTE

: This furnace is design

certified by CSA International (for-

merly AGA and CGA) for installation in the United States and Can-

ada. Refer to the appropriate codes, along with this manual, for

proper installation.

Use only the Type of gas approved for this furnace (see

 Rat-

ing Plate 

on unit). Overfiring will result in failure of heat ex-

changer and cause dangerous operation. (Furnaces can be

converted to Propane gas with approved kit.)

Install this furnace only in a location and position as speci-

fied in “

Installation”

 of these instructions.

Provide adequate combustion and ventilation air to the fur-

nace as specified in “

Combustion and Ventilation Air” 

 of

these instructions.

Combustion products must be discharged outdoors. Con-

nect this furnace to an approved vent system only, as speci-

fied in “

Gas Vent Installation, Horizontal Venting and

Masonry Chimney Venting”

 of these instructions.

Never test for gas leaks with an open flame. Use a commer-

cially available soap solution made specifically for the detec-

tion of leaks to check all connections, as specified in “

Gas

Supply and Piping, Final Check”

 of these instructions.

Always install furnace to operate within the furnace’s in-

tended temperature

rise range with a duct system which

has an external static pressure within the allowable range,

as specified in “

Technical Support Manual”

 of these instruc-

tions. See furnace rating plate.

When a furnace is installed so that supply ducts carry air cir-

culated by the furnace to areas outside the space containing

the furnace, the return air shall also be handled by a duct(s)

sealed to the furnace casing and terminating outside the

space containing the furnace.

A gas

fired furnace for installation in a residential garage

must be installed as specified in “

Installation”

 of these in-

structions.

This furnace is not to be used for temporary heating of build-

ings or structures under construction. See “

 Installation”

This furnace is NOT approved for installation in mobile

homes, trailers or recreation vehicles.

Seal around supply and return air ducts.

Install correct filter type and size.

Unit 

MUST

 be installed so electrical components are pro-

tected from direct contact with water.

Safety Rules

Your unit is built to provide many years of safe and dependable

service providing it is properly installed and maintained. However,

abuse and/or improper use can shorten the life of the unit and

create hazards for you, the owner.
A. The U.S. Consumer Product Safety Commission encourages

installation of carbon monoxide alarms. There can be various

sources of carbon monoxide in a building or dwelling. The

sources could be gas

fired clothes dryers, gas cooking

stoves, water heaters, furnaces, gas

fired fireplaces, wood

fireplaces.

 

Carbon monoxide can cause bodily injury and/or death. Car-

bon monoxide or “CO” is a colorless and odorless gas pro-

duced when fuel is not burned completely or when the flame

does not receive sufficient oxygen. 

Therefore, to help alert people of potentially dangerous carbon

monoxide levels, you should have a commercially available

carbon monoxide alarm that is listed by a nationally recog-

nized testing agency in accordance with Underwriters Labora-

tories Inc. Standard for Single and Multiple Station Carbon

Monoxide Alarms, ANSI/UL 2034 or the CSA 6.19

01 Resi-

dential Carbon Alarming Devices installed and maintained in

the building or dwelling concurrently with the gas

fired furnace

installation (see Note below). The alarm should be installed as

recommended by the alarm manufacturer’s installation in-

structions.

B. There can be numerous sources of fire or smoke in a building

or dwelling. Fire or smoke can cause bodily injury, death, and/

or property damage. Therefore, in order to alert people of po-

tentially dangerous fire or smoke, you should have fire

extinguisher and smoke alarms listed by Underwriters Labora-

tories installed and maintained in the building or dwelling (see

Note below).

Note:

 The manufacturer of your furnace does not test any alarms

and makes no representations regarding any brand or type

of alarms.

C. To ensure safe and efficient operation of your unit, you should

do the following:

1.

Thoroughly read this manual and labels on the unit.

 This

will help you understand how your unit operates and the haz-

ards involved with gas and electricity.

2.

Do not use this unit if any part has been under water.

 Im-

mediately call a qualified service agency to inspect the unit and

to replace any part of the control system and any gas control

which has been under water.

3.

Never obstruct the vent grilles, or any ducts that provide

air to the unit.

 Air must be provided for proper combustion and

ventilation of flue gases.

Frozen Water Pipe Hazard

WATER DAMAGE TO PROPERTY HAZARD
Failure to follow this warning could result in

property damage.
Do not leave your home unattended for long

periods during freezing weather without turning off

water supply and draining water pipes or otherwise

protecting against the risk of frozen pipes and

resultant damage.

!

WARNING

Summary of Contents for C8DNL

Page 1: ...injury TABLE OF CONTENTS SAFETY CONSIDERATIONS 2 Safe Installation Requirements 3 INSTALLATION 4 Combustion Ventilation Air 6 Gas Vent Installation 9 Venting Horizonta 10 Venting Chimney Adapter 12 Ga...

Page 2: ...nformation This is the safety alert symbol When you see this symbol on the unit and in instructions or manuals be alert to the potential for personal injury Understand these signal words DANGER WARNIN...

Page 3: ...e ON setting ____ Fan Time OFF Setting ___ Manual Gas Shut Off Upstream of Furnace Drip Leg Gas Valve turned ON Type of Gas Natural Propane Filter Type and Size Calculated Firing Rate See Checks and A...

Page 4: ...around supply and return air ducts Install correct filter type and size Unit MUST be installed so electrical components are pro tected from direct contact with water Safety Rules Your unit is built to...

Page 5: ...ible material See Ductwork and Filter Sub base for Com bustible Floors 6 Maintain clearance for fire safety and servicing A front clear ance of 24 609 6mm required and 30 762mm recommen ded for access...

Page 6: ...ion Line contact is permissible only between lines formed by intersections of top and two sides of furnace jacket and building joists studs or framing DIMENSIONAL INFORMATION Unit Capacity Cabinet Top...

Page 7: ...gens that will result in safety and performance related problems and may harm the furnace These instances must use only out door air for combustion The following areas or types of structures may cont...

Page 8: ...Not less than the sum of the areas of all vent connectors in the space The opening shall commence within 12 304 8mm of the top of the enclosure Appliances shall have clearances of at least 1 25 4mm f...

Page 9: ...0 20 3 150 88 2 4 200 117 6 5 250 147 3 750 105 5 625 157 5 7 500 210 9 375 262 5 11 250 316 0 10 6 300 176 4 8 400 235 2 10 500 294 7 500 210 11 250 315 15 000 420 18 750 525 22 500 632 0 00 NP NP NP...

Page 10: ...pipe as per mitted by the National Fuel Gas Code Code ANSI Z223 1 NFPA 54 2009 Sections 12 and 13 venting requirements in the United States or the National Standard of Canada Natural Gas and Pro pane...

Page 11: ...st be lined with either Type B vent sized in accordance with NFGC tables 13 1 or 13 2 or a listed metal lining system sized in accordance with the NFGC Section 13 1 7 for a single appliance or 13 2 20...

Page 12: ...dryer or water heater vent or other appliance s direct vent intake or exhaust N Clearance to the vent terminal of a dryer vent water heater vent or other appliances direct vent intake or exhaust O Cle...

Page 13: ...s are for use with ONLY furnaces having a Chimney Adapter Kit number marked on the furnace rating plate WARNING If a clay tile lined masonry chimney is being used and it is exposed to the outdoors bel...

Page 14: ...vent in a chase If a metal liner or Type B vent is used to line a chimney no other appliance shall be vented into the annular space between the chimney and the metal liner APPLIANCE APPLICATION REQUI...

Page 15: ...anufacturer s installation instructions CHIMNEY INSPECTION CHART For additional requirements refer to the National Fuel Gas Code ANSI Z223 1 NFPA 54 2009 and ANSI NFPA 211 2006 Chimneys Fire places Ve...

Page 16: ...ose to the furnace as possible where it is readily ac cessible Refer to Figure 7 FIRE HAZARD Failure to follow this warning could result in personal injury death and or property damage Use wrench to h...

Page 17: ...rnace Black iron pipe shall be installed at the furnace gas control valve and extend a minimum of 2 50 8mm outside furnace WARNING Additional Propane Piping Requirements Have a licensed Propane gas de...

Page 18: ...Box to alternate location and attach using two self tapping screws from bag 5 A wire tie may need to be cut for additional wire length 6 Apply two hole plugs from bag at left J Box location 7 Positio...

Page 19: ...trical shorts of 24V wiring during installation service or maintenance may cause fuse to blow If fuse replacement is required use only a fuse of identical size 5 amp FUSE 25 24 98 Diagnostic Light Jum...

Page 20: ...er is in the full heat or cool position Installation of locking type dampers is recommended in all branches or in individual ducts to balance system s air flows Non combustible flexible duct connector...

Page 21: ...15 381 221 2 571 5 Subbase for Coil Box NAHH004SB 153 4 25 4 209 16 522 3 149 16 369 9 161 16 408 161 4 412 8 145 8 371 5 15 381 131 2 342 9 15 381 131 2 342 9 NAHH005SB 193 8 181 1 209 16 522 3 183...

Page 22: ...e return air plenum above the furnace A filter rack is supplied with each furnace See Figure 17 Use either filter type Washable high velocity filters are based on a maximum air flow rating of 600 FPM...

Page 23: ...d pull straight down at side of blower Pull out through right door opening 4 Vacuum clean or wash with warm water and dry thoroughly be fore replacing NOTE If filters are only suitable for heating app...

Page 24: ...rol Remove manometer connection from manifold pressure tap and replace plug in gas valve 7 Check for leaks at plug Typical Gas Control Valve Figure 19 Regulator Adjustment Under Cap Inlet Pressure Tap...

Page 25: ...in accordance with the Manufacturer s instructions and all applicable codes and requirements or in the absence of local codes the applicable national codes WARNING MANIFOLD PRESSURE AND ORIFICE SIZE F...

Page 26: ...e burner compartment 2 Disconnect gas line from gas control valve so manifold can be removed 3 Disconnect wiring at gas control valve Be sure to note the proper location of all electrical wiring befor...

Page 27: ...ply and return air registers as close to furnace as possible avoiding direct radiant heat from heat exchangers 2 Operate furnace for 10 minutes with all the registers and duct dampers open by using a...

Page 28: ...he continuous fan option This connection is intended for the low speed motor tap and has a lower contact rating 8 amps than the heat and cool taps When the low speed blower lead is connected to this t...

Page 29: ...continuously while there are no other blower demands from furnace control Fan demands from furnace control for heat cool or G will override hard wired speed tap NOTE 3 EAC is NOT active for hard wired...

Page 30: ...c Codes See Figure 25 OFF 24VAC or 115VAC is off fuse is open Heartbeat Normal operation or no previous Diagnostic Code ON SOLID Soft Lockout Furnace Control Error 1 hr delay If code repeats immediate...

Page 31: ...ubject to change without notice Save This Manual For Future Reference Downflow Models 8DNL050B12B2 8DNL075B12B2 8DNL075F16B2 8DNL100F14B2 8DNL100L20B2 8DNL125L20B2 Denotes Brand International Comfort...

Page 32: ...han 4 480oF 264oC 4 480oF 264oC 4 480oF 264oC 4 480oF 264oC 4 480oF 264oC 4 480oF 264oC Limits Controls Thermal Sensor oF oC Limit Control 300 149 See Parts List 300 149 See Parts List 300 149 See Par...

Page 33: ...Liters per second Filter required for each return air inlet Airflow performance includes 1 25 4mm washable 600 FPM 3 0 m s max filter media See Table for bellyband location on motor 8DNL100F14 1 Exter...

Page 34: ...441 01 2314 06 Specifications are subject to change without notice 33 Wiring Diagram 8DNL...

Page 35: ...njury or property damage Consult a qualified installer service agency local gas supplier or your distributor or branch for information or assistance The qualified installer or agency must use only fac...

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