Lennox EL195UH040NE36B, EL195UH060NE36B, EL195UH080NE48C, EL195UH100NE60C Installation Instructions And Use

Download

Page 1

Dallas, Texas USA

INSTALLATION INSTRUCTIONS EL195UHNE

ELITE® SERIES GAS FURNACE UPFLOW / HORIZONTAL AIR DISCHARGE

507758-02 02/2018 Supersedes 507758-01

THIS MANUAL MUST BE LEFT WITH THE

HOMEOWNER FOR FUTURE REFERENCE

This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in manuals, be alert to the potential for personal injury or death.

CAUTION

As with any mechanical equipment, contact with sharp sheet metal edges can result in personal injury. Take care while handling this equipment and wear gloves and protective clothing.

Contents

Unit Dimensions - inches (mm) ......................................2

EL195UHNE Gas Furnace .............................................3

Shipping and Packing List ..............................................3

Safety Information ..........................................................3

Use of Furnace as Construction Heater .........................4

General ........................................................................... 5

Combustion, Dilution & Ventilation Air ............................5

Shipping Bolt Removal ...................................................8

Installation - Setting Equipment ...................................... 8

Filters ............................................................................ 13

Duct System .................................................................13

Pipe Fittings Specications...........................................13

Joint Cementing Procedure .......................................... 16

WARNING

Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Installation and service must be performed by a licensed professional HVAC installer or equivalent, service agency, or the gas supplier.

Venting Practices ..........................................................16

Vent Piping Guidelines .................................................17

Gas Piping .................................................................... 36

Electrical ....................................................................... 38

Ignition Control .............................................................41

Unit Start-Up ................................................................. 41

Gas Pressure Adjustment ............................................. 44

Proper Combustion.......................................................44

High Altitude Information .............................................. 44

Testing for Venting and Combustion Air........................45

Service..........................................................................46

Repair Parts List ........................................................... 48

Start-Up & Performance Check List .............................49

Page 1

Page 2

EL195UHNE Unit Dimensions - inches (mm)

(19)

EXHAUST AIR

FRONT VIEW SIDE VIEW

1-1/2

NOTE - 60C size units that require air volumes over 1800 cfm must have one of the following:

1. Single side return air and Optional Return Air Base with transition that must accommodate required 20 x 25 x 1 inch (508 x 635 x 25 mm) air filter to maintain proper velocity.

2. Bottom return air.

3. Return air from both sides.

4. Bottom and one side return air. See Blower Performance Tables for additional information.

Optional Side Return Air Filter Kit is not for use with the Optional Return Air Base.

9/16 (14)

OPTIONAL

SIDE RETURN

AIR FILTER KIT

(Either Side)

14-3/4

(375)

(406)

(838)

1-7/8 (48)

COMBUSTION

AIR INTAKE

OPTIONAL

SIDE RETURN

AIR FILTER KIT

(Either Side)

1-1/2 (38)

Front Panel

6-5/8 (168)

12-5/8

(321)

Not Used

ELECTRICAL

INLET

(Either Side)

2-7/8

(73)

3-1/4

(83)

2-1/4

(57)

OUTLET

SUPPLY AIR

OPENING

23-3/4

(603)

(635)

TOP VIEW

27-3/4

(705)

19-7/16

(494)

INTAKE AIR

GAS PIPING INLET (Right Side Only)

CONDENSATE TRAP CONNECTION (Either Side)

6-1/2 (165) (Either Side)

(584)

Side Return Air Opening (Either Side)

9/16

(14)

(38)

(356)

AIR FLOW

3/4

Bottom Return

Air Opening

3/4

(19)

Model

EL195UH040NE36B EL195UH060NE36B

17-1/2 (446) 16-3/8 (416) 16 (406)

EL195UH080NE48C EL195UH100NE60C

in (mm)

21 (553) 19-7/8 (505) 19-1/2 (495)

5/8

(16)

Page 2

3-1/4

(83)

in (mm)

23-1/2

(597)

Bottom Return

Air Opening

1-15/16 (49)

in (mm)

Page 3

EL195UHNE Gas Furnace

The EL195UHNE Category IV gas furnace is shipped ready for

installation in the upow or horizontal position. The furnace is

shipped with the bottom panel in place. The bottom panel must

be removed if the unit is to be installed in horizontal or upow

applications with bottom return air.

The EL195UHNE can be installed as either a Direct Vent or a Non-Direct Vent gas central furnace. The fur-

nace is equipped for installation in natural gas applications.

NOTE - In Direct Vent installations, combustion air is tak-

en from outdoors and ue gases are discharged outdoors.

In Non-Direct Vent installations, combustion air is taken

from indoors or ventilated attic or crawlspace and ue gases are discharged outdoors. See gures 1 and 2 for applications involving roof termination.

DIRECT VENT INSTALLATION NON-DIRECT VENT

EXHAUST OUTLET

COMBUSTION

AIR INTAKE OUTSIDE

OF HOUSE

INSTALLATION

EXHAUST

OUTLET

Shipping and Packing List

Package 1 of 1 contains

1 - Assembled EL195UHNE unit 1 - Bag assembly containing the following:

1 - Snap bushing 1 - 1/2” diameter threaded street elbow 1 - Snap plug 1 - Wire tie 1 - Condensate trap 1 - Condensate trap cap 1 - Condensate trap clamp 1 - 2” diameter debris screen 1 - 3/4” Threaded street elbow

Check equipment for shipping damage. If you nd any

damage, immediately contact the last carrier. The following items may also be ordered separately: 1 - Thermostat 1 - Return air base kit

1 - Horizontal suspension kit

Safety Information

Figure 1

NON-DIRECT VENT

INSTALLATION

EXHAUST OUTLET

COMBUSTION

AIR INTAKE INSIDE

VENTILATED

ATTIC SPACE

Figure 2

COMBUSTION

AIR INTAKE

INSIDE

OF HOUSE

NON-DIRECT VENT

INSTALLATION

EXHAUST OUTLET

COMBUSTION

AIR INTAKE INSIDE

VENTILATED

CRAWL SPACE

WARNING

CAUTION

As with any mechanical equipment, contact with sharp sheet metal edges can result in personal injury. Take care while handling this equipment and wear gloves and protective clothing.

Use only the type of gas approved for use with this furnace. Refer to unit nameplate.

EL195UHNE units are CSA International certied to ANSI

Z21.47 and CSA 2.3 standards. Building Codes In the USA, installation of gas furnaces must conform with

local building codes. In the absence of local codes, units must be installed according to the current National Fuel Gas Code (ANSI-Z223.1/NFPA 54). The National Fuel Gas Code is available from the following address:

American National Standards Institute, Inc. 11 West 42nd Street New York, NY 10036

In Canada, installation must conform with current National Standard of Canada CSA-B149 Natural Gas and Propane Installation Codes, local plumbing or waste water codes and other applicable local codes.

Page 3

Page 4

In order to ensure proper unit operation in non-direct vent

Heating Unit Installed Parallel to Air Handler Unit

Cooling Coil

applications, combustion and ventilation air supply must be provided according to the current National Fuel Gas Code or CSA-B149 standard.

Installation Locations

This furnace is CSA International certied for installation

clearances to combustible material as listed on the unit

nameplate and in the table in gure 12. Accessibility and service clearances must take precedence over re protec-

tion clearances.

NOTE - For installation on combustible oors, the furnace shall not be installed directly on carpeting, tile, or other combustible material other than wood ooring.

For installation in a residential garage, the furnace must be installed so that the burner(s) and the ignition source are located no less than 18 inches (457 mm) above the

oor. The furnace must be located or protected to avoid

physical damage by vehicles. When a furnace is installed in a public garage, hangar, or other building that has a hazardous atmosphere, the furnace must be installed according to recommended good practice requirements and current National Fuel Gas Code or CSA B149 standards.

NOTE - Furnace must be adjusted to obtain a temperature

rise within the range specied on the unit nameplate. Failure to do so may cause erratic limit operation and premature heat exchanger failure.

This EL195UHNE furnace must be installed so that its electrical components are protected from water.

Installed in Combination with a Cooling Coil

When this furnace is used with cooling coils (gure 3), it

shall be installed in parallel with, or on the upstream side of, cooling coils to avoid condensation in the heating com-

partment. With a parallel ow arrangement, a damper (or other means to control the ow of air) must adequately

prevent chilled air from entering the furnace. If the damper is manually operated, it must be equipped to prevent operation of either the heating or the cooling unit, unless it is in the full HEAT or COOL setting.

When installed, this furnace must be electrically grounded according to local codes. In addition, in the United States, installation must conform with the current National Electric Code, ANSI/NFPA No. 70. The National Electric Code (ANSI/NFPA No. 70) is available from the following address:

National Fire Protection Association 1 Battery March Park Quincy, MA 02269

In Canada, all electrical wiring and grounding for the unit must be installed according to the current regulations of the Canadian Electrical Code Part I (CSA Standard C22.1)

and/or local codes.

Dampers

(open during heating operation only)

Gas Unit

AIR FLOWAIR FLOW

Air Handler Unit

Dampers

(open during cooling operation only)

Heating Unit Installed Upstream of Cooling Coil

AIR FLOW AIR FLOW

Gas Unit

Figure 3

NOTE - This furnace is designed for a minimum continuous return air temperature of 60°F (16°C) or an intermittent operation down to 55°F (13°C) dry bulb for cases where a night setback thermostat is used. Return air temperature must not exceed 85°F (29°C) dry bulb.

The EL195UHNE furnace may be installed in alcoves, closets, attics, basements, garages, crawl spaces and

utility rooms in the upow or horizontal position. This furnace design has not been CSA certied for installation in

mobile homes, recreational vehicles, or outdoors.

Use of Furnace as Construction Heater

Lennox does not recommend the use of EL195UHNE units as a construction heater during any phase of construction. Very low return air temperatures, harmful vapors

and operation of the unit with clogged or misplaced lters

will damage the unit. Units may be used for heating of buildings or structures

under construction, if the following conditions are met::

• The vent system must be permanently installed per

these installation instructions.

• A room thermostat must control the furnace. The

use of xed jumpers that will provide continuous heating is not allowed.

• The return air duct must be provided and sealed to

the furnace.

• Return air temperature range between 60°F (16°C)

and 80°F (27°C) must be maintained.

• Air lters must be installed in the system and must

be maintained during construction.

Page 4

Page 5

• Air lters must be replaced upon construction com-

pletion.

• The input rate and temperature rise must be set per

the furnace rating plate.

• One hundred percent (100%) outdoor air must be

provided for combustion air requirements during construction. Temporary ducting may supply outdoor air to the furnace. Do not connect duct directly to the furnace. Size the temporary duct following these instructions in section for Combustion, Dilution and Ventilation Air in a conned space with air from outside.

• The furnace heat exchanger, components, duct

system, air lters and evaporator coils must be thoroughly cleaned following nal construction clean-up.

• All furnace operating conditions (including ignition,

input rate, temperature rise and venting) must be veried according to these installation instructions.

General

These instructions are intended as a general guide and do not supersede local codes in any way. Consult authorities having jurisdiction before installation.

In addition to the requirements outlined previously, the following general recommendations must be considered when installing a EL195UHNE furnace:

• Place the furnace as close to the center of the air distribution system as possible. The furnace should also be located close to the vent termination point.

• When the furnace is installed in non-direct vent applications, do not install the furnace where drafts might blow directly into it. This could cause improper combustion and unsafe operation.

• When the furnace is installed in non-direct vent applications, do not block the furnace combustion air opening with clothing, boxes, doors, etc. Air is needed for proper combustion and safe unit operation.

• When the furnace is installed in an attic or other insulated space, keep insulation away from the furnace.

• When the furnace is installed in an unconditioned space, consider provisions required to prevent

freezing of condensate drain system.

• Please consult the manufacturer of your evaporator coil for their recommendations on distance required between the heat exchanger and their drain pan. Adequate space must be provided between the drain pan and the furnace heat exchanger.

CAUTION

EL195UHNE unit should not be installed in areas

normally subject to freezing temperatures.

WARNING

Insufcient combustion air can cause headaches, nausea, dizziness or asphyxiation. It will also cause

excess water in the heat exchanger resulting in rusting and premature heat exchanger failure. Excessive exposure to contaminated combustion air will result in safety and performance related problems. Avoid exposure to the following substances in the combustion air supply:

Permanent wave solutions Chlorinated waxes and cleaners Chlorine base swimming pool chemicals Water softening chemicals De-icing salts or chemicals Carbon tetrachloride Halogen type refrigerants Cleaning solvents (such as perchloroethylene) Printing inks, paint removers, varnishes, etc. Hydrochloric acid Cements and glues Antistatic fabric softeners for clothes dryers Masonry acid washing materials

Combustion, Dilution & Ventilation Air

If the EL195UHNE is installed as a Non-Direct Vent Furnace, follow the guidelines in this section.

NOTE - In Non-Direct Vent installations, combustion air is taken from indoors or ventilated attic or crawlspace and

ue gases are discharged out-doors.

In the past, there was no problem in bringing in sufcient outdoor air for combustion. Inltration provided all the air

that was needed. In today’s homes, tight construction practices make it necessary to bring in air from outside for combustion. Take into account that exhaust fans, appli-

ance vents, chimneys, and replaces force additional air

that could be used for combustion out of the house. Unless outside air is brought into the house for combus-

tion, negative pressure (outside pressure is greater than inside pressure) will build to the point that a downdraft can occur in the furnace vent pipe or chimney. As a result, combustion gases enter the living space creating a potentially dangerous situation.

In the absence of local codes concerning air for combustion and ventilation, use the guidelines and procedures in this section to install EL195UHNE furnaces to ensure efcient and safe operation. You must consider combustion air needs and requirements for exhaust vents and gas piping. A portion of this information has been reprinted with permission from the National Fuel Gas Code (ANSIZ223.1/NFPA 54). This reprinted material is not the com-

plete and ofcial position of the ANSI on the referenced

subject, which is represented only by the standard in its entirety.

Page 5

Page 6

In Canada, refer to the CSA B149 installation codes.

EQUIPMENT IN CONFINED SPACE - ALL AIR FROM INSIDE

(64516mm.

CAUTION

Do not install the furnace in a corrosive or contaminated atmosphere. Meet all combustion and ventilation air requirements, as well as all local codes.

All gas-red appliances require air for the combustion process. If sufcient combustion air is not available, the furnace or other appliance will operate inefciently and

unsafely. Enough air must be provided to meet the needs of all fuel-burning appliances and appliances such as exhaust fans which force air out of the house. When replaces, exhaust fans, or clothes dryers are used at the same time as the furnace, much more air is required to ensure proper combustion and to prevent a downdraft. Insufcient air causes incomplete combustion which can result in carbon monoxide.

In addition to providing combustion air, fresh outdoor air dilutes contaminants in the indoor air. These contaminants may include bleaches, adhesives, detergents, solvents and other contaminants which can corrode furnace components.

The requirements for providing air for combustion and ventilation depend largely on whether the furnace is in-

stalled in an unconned or a conned space.

Unconned Space

An unconned space is an area such as a basement or

large equipment room with a volume greater than 50 cubic feet (1.42 m3) per 1,000 Btu (.29 kW) per hour of the combined input rating of all appliances installed in that space. This space also includes adjacent rooms which are not separated by a door. Though an area may appear to be

unconned, it might be necessary to bring in outdoor air

for combustion if the structure does not provide enough air

by inltration. If the furnace is located in a building of tight

construction with weather stripping and caulking around the windows and doors, follow the procedures in the Air from Outside section.

Conned Space

A conned space is an area with a volume less than 50

cubic feet (1.42 m3) per 1,000 Btu (.29 kW) per hour of the combined input rating of all appliances installed in that

space. This denition includes furnace closets or small

equipment rooms. When the furnace is installed so that supply ducts carry

air circulated by the furnace to areas outside the space containing the furnace, the return air must be handled by ducts which are sealed to the furnace casing and which terminate outside the space containing the furnace. This is especially important when the furnace is mounted on

a platform in a conned space such as a closet or small

equipment room.

Even a small leak around the base of the unit at the platform or at the return air duct connection can cause a potentially dangerous negative pressure condition. Air for combustion and ventilation can be brought into the con-

ned space either from inside the building or from outside

.Air from Inside

If the conned space that houses the furnace adjoins a space categorized as unconned, air can be brought in by

providing two permanent openings between the two spaces. Each opening must have a minimum free area of 1 square inch (645 mm2) per 1,000 Btu (.29 kW) per hour of

total input rating of all gas-red equipment in the conned

space. Each opening must be at least 100 square inches (64516 mm2). One opening shall be within 12 inches (305 mm) of the top of the enclosure and one opening within 12

inches (305 mm) of the bottom. See gure 4.

ROOF TERMINATED

EXHAUST PIPE

OPENINGS

SIDE WALL

TERMINATED

EXHAUST PIPE

(ALTERNATE

LOCATION)

NOTE - Each opening shall have a free area of at least one square inch per 1,000 Btu (645mm all equipment in the enclosure, but not less than 100 square inches

2).

EL296UH

per .29kW) per hour of the total input rating of

(To Adjacent

Unconfined

Space)

Figure 4

Air from Outside

If air from outside is brought in for combustion and ventilation, the conned space shall be provided with two permanent openings. One opening shall be within 12” (305mm) of the top of the enclosure and one within 12” (305mm) of the bottom. These openings must communicate directly or by ducts with the outdoors or spaces (crawl or attic) that freely communicate with the outdoors or indirectly through vertical ducts. Each opening shall have a minimum free area of 1 square inch per 4,000 Btu (645mm2 per 1.17kW) per hour of total input rating of all equipment in the enclosure. When communicating with the outdoors through

horizontal ducts, each opening shall have a minimum free

area of 1 square inch per 2,000 Btu (645mm2 per .59kW) per total input rating of all equipment in the enclosure (See

gure 5).It is also permissible to bring in air for combustion from a ventilated attic (gure 6) or ventilated crawl space (gure 7).

Page 6

Page 7

EQUIPMENT IN CONFINED SPACE - ALL AIR FROM OUTSIDE

(Inlet Air from Crawl Space and Outlet Air to Outside)

hour of the total input rating of all equipment in the enclosure.

EQUIPMENT IN CONFINED SPACE

VENTILATION LOUVERS

OUTLET

AIR

(Each end of attic)

ROOF TERMINATED

EXHAUST PIPE

SIDE WALL

TERMINATED

EXHAUST PIPE

(ALTERNATE

LOCATION)

FURNACE

INLET

AIR

VENTILATION

LOUVERS

(For unheated

crawl space)

(Inlet Air from Ventilated Crawlspace and Outlet Air to Outside)

Roof Terminated

Exhaust Pipe

Inlet Air

(Minimum

Ventilation

Louvers

(Crawl space)

Furnace

12 in.(305mm)

Above crawl

space floor)

NOTE-The inlet and outlet air openings shall each have a free area of at least one square inch per 4,000 Btu (645mm

per 1.17kW) per

Figure 5

(Inlet Air from Ventilated Attic and Outlet Air to Outside)

Roof Terminated

Exhaust Pipe

NOTE-The inlet and outlet air openings shall each have a free area of at least one square inch per 4,000 Btu (645mm hour of the total input rating of all equipment in the enclosure.

EQUIPMENT IN CONFINED SPACE

Ventilation Louvers

12 in.(305mm) Above

*Intake Debris

Screen

(Provided)

Furnace

per 1.17kW) per

Figure 6

(Minimum

attic floor)

Inlet Air

Coupling or 3 in. to 2 in.

Transition

(Field Provided)

NOTE-The inlet and outlet air openings shall each have a free area of at least one square inch per 4,000 Btu (645mm

*Intake Debris Screen Provided)

per 1.17kW) per

Figure 7

If air from outside is brought in for combustion and ventilation, the conned space must have two permanent openings. One opening shall be within 12 inches (305 mm) of the top of the enclosure and one opening within 12 inches (305 mm) of the bottom. These openings must communicate directly or by ducts with the outdoors or spaces (crawl or attic) that freely communicate with the outdoors or indirectly through vertical ducts. Each opening shall have a minimum free area of 1 square inch (645 mm2) per 4,000 Btu (1.17 kW) per hour of total input rating of all equipment

in the enclosure. See gures 5 and 8. When communicating with the outdoors through horizontal ducts, each

opening shall have a minimum free area of 1 square inch (645 mm2) per 2,000 Btu (.56 kW) per total input rating of

all equipment in the enclosure. See gure 9.

When ducts are used, they shall be of the same cross-sectional area as the free area of the openings to which they connect. The minimum dimension of rectangular air ducts shall be no less than 3 inches (75 mm). In calculating free area, the blocking effect of louvers, grilles, or screens must be considered. If the design and free area of protec-

tive covering is not known for calculating the size opening

required, it may be assumed that wood louvers will have 20 to 25 percent free area and metal louvers and grilles will have 60 to 75 percent free area. Louvers and grilles

must be xed in the open position or interlocked with the

equipment so that they.

Page 7

Page 8

EQUIPMENT IN CONFINED SPACE - ALL AIR FROM OUTSIDE

ROOF TERMINATED

EQUIPMENT IN CONFINED SPACE -

hour of the total input rating of all other equipment in the enclosure.

EXHAUST PIPE

(All Air Through Ventilated Attic)

VENTILATION LOUVERS

(Each end of attic)

OUTLET

AIR

exible mounting leg). See gure 10. The bolt and washer

must be removed before the furnace is placed into operation. After the bolt and washer have been removed, the rigid leg will not touch the blower housing.

Units with 1/2 or 3/4 HP Blower Motor

SIDE WALL

TERMINATED

EXHAUST PIPE

(ALTERNATE

LOCATION)

NOTE-The inlet and outlet air openings shall each have a free area of at least one square inch per 4,000 Btu (645mm of the total input rating of all equipment in the enclosure.

FURNACE

INLET AIR

(Ends 12” above

per 1.17kW) per hour

Figure 8

ALL AIR FROM OUTSIDE

ROOF TERMINATED

EXHAUST PIPE

OUTLET AIR

SIDE WALL

TERMINATED

EXHAUST PIPE

(ALTERNATE

LOCATION)

NOTE-Each air duct opening shall have a free area of at least one square inch per 2,000 Btu (645mm input rating of all equipment in the enclosure. If the equipment room

cate directly with the outdoors, each opening shall have a free area of at least 1 square inch per 4,000 Btu (645mm

FURNACE

INLET AIR

per .59kW) per hour of the total

per 1.17kW) per

Figure 9

Shipping Bolt Removal

Units with 1/2 and 3/4 hp blower motor are equipped

with three exible legs and one rigid leg. The rigid leg is equipped with a shipping bolt and a at white plastic wash-

er (rather than the rubber mounting grommet used with a

remove shipping bolt and washe

RIGID LEG

bottom)

Figure 10

Installation - Setting Equipment

WARNING

Do not connect the return air duct to the back of the furnace. Doing so will adversely affect the operation of the safety control devices, which could result in personal injury or death.

WARNING

Blower access panel must be securely in place when blower and burners are operating. Gas fumes, which could contain carbon monoxide, can be drawn into living space resulting in personal injury or death.

Upow Applications

The EL195UHNE gas furnace can be installed as shipped

in the upow position. Refer to gure 12 for clearances.

Select a location that allows for the required clearances that are listed on the unit nameplate. Also consider gas supply connections, electrical supply, vent connection, condensate trap and drain connections, and installation and service clearances [24 inches (610 mm) at unit front]. The unit must be level from side to side. The unit may be

positioned from level to ½” toward the front. See gure 11.

Allow for clearances to combustible materials as indicated on the unit nameplate.

Page 8

Page 9

SETTING EQUIPMENT

END VIEW

Unit must be level side-to-side. Unit may be positioned from level to 1/2” toward the front to aid in draining.

UPFLOW APPLICATION

UNIT

FRONT

1/2” max.

SIDE VIEW

AIR FLOW

FRONT VIEW

UNIT

FRONT

SIDE VIEW

HORIZONTAL APPLICATION

AIR FLOW

FRONT VIEW

Figure 11

UNIT

FRONT

1/2”

max.

Page 9

Page 10

WARNING

Installation Clearances

Top

Bottom (Floor)

Left Side

Right Side

Top/Plenum 1 in. (25 mm)

*Front 1

Back 1

Sides 1†

Vent 1

Floor 0‡

*Front clearance in alcove installation must be 24 in. (610 mm). Maintain a minimum of 24 in. (610 mm) for front service access.

†Allow proper clearances to accommodate condensate trap. ‡For installations on a combustible floor, do not install the furnace

directly on carpeting, tile or other combustible materials other than wood flooring.

Side Return Air

Transition

Improper installation of the furnace can result in personal

injury or death. Combustion and ue products must

never be allowed to enter the return air system or air in the living space. Use sheet metal screws and joint tape to seal return air system to furnace.

In platform installations with furnace return, the furnace should be sealed airtight to the return air plenum. A door must never be used as a portion of the return air duct system. The base must provide a stable support and an airtight seal to the furnace. Allow absolutely no sagging, cracks, gaps, etc. For no reason should return and supply air duct systems ever be connected to or from

other heating devices such as a replace or stove, etc.

Fire, explosion, carbon monoxide poisoning, personal injury and/or property damage could result.

Return Air Guidelines

Return air can be brought in through the bottom or either

side of the furnace installed in an upow application. If the

furnace is installed on a platform with bottom return, make an airtight seal between the bottom of the furnace and the platform to ensure that the furnace operates properly and safely. The furnace is equipped with a removable bottom panel to facilitate installation.

Markings are provided on both sides of the furnace cabinet for installations that require side return air. Cut the furnace cabinet at the maximum dimensions shown on page 2.

Refer to Engineering Handbook for additional information.

EL195UHNE applications which include side return air and a condensate trap installed on the same side of the cabinet (trap can be installed remotely within 5

ft.) require either a return air base or eld-fabricated

transition to accommodate an optional IAQ accessory

taller than 14.5”. See gure 13.

(with transition and filter)

Figure 12

20” X 25” X 1”

(508mmX635mmX 25mm)

Air Filter

Return

Air

Plenum

Figure 13

Page 10

Page 11

Optional Return Air Base

To minimize pressure drop, the largest opening height possible (up to 14 inches) is preferred.

CONDENSATE

Removing the Bottom Panel

Bottom Panel

TRAP

AIR FLOW

FURNACE

FRONT

INDOOR AIR

QUALITY CABINET

(PCO, Filter

Cabinet, etc.)

(Upflow Applications Only)

IF BASE IS USED

WITHOUT

IAQ CABINET,

A SINGLE

RETURN AIR

PLENUM

MUST

COVER BOTH

UNIT AND

RETURN

AIR BASE

OPENINGS

3−1/4

(83)

7−1/4 (184)

23 (584)

Overall

(Maximum)

Unit side return air

Opening

5−5/8 (143)

SIDE RETURN

AIR OPENINGS

(Either Side)

Minimum

11 (279)

Maximum

14 (356)

22−7/16

(570)

Overall

(Maximum)

17−1/2 (446) B Width (50W98) 21 (533) C Width (50W99)

24−1/2 (622) D Width (51W00)

OPTIONAL RETURN AIR BASE

(584)

26−7/8

(683)

SIDE VIEW

3/4

(19)

FRONT VIEW

NOTE- Optional side return air filter kits are not for use with return air base.

Both the unit return air opening and the base return air opening must be covered by a single plenum or IAQ cabinet. Minimum unit side return air opening dimensions for units requiring 1800 cfm or more of air (W x H): 23 x 11 in. (584 x 279 mm). The opening can be cut as needed to accommodate plenum or IAQ cabinet while maintaining dimensions shown. Side return air openings must be cut in the field. There are cutting guides stenciled on the cabinet for the side return air opening. The size of the opening must not extend beyond the markings on the furnace cabinet.

Figure 14

Removing the Bottom Panel

Remove the two screws that secure the bottom cap to the furnace. Pivot the bottom cap down to release the bottom panel. Once the bottom panel has been removed, reinstall

the bottom cap. See gure 15.

Horizontal Applications

WARNING

Do not install the furnace on its front or back. See gure

16.

See figure 4.

Screw

Bottom Cap

Figure 15

Page 11

Front Back

Figure 16

Page 12

The EL195UHNE furnace can be installed in horizontal

Horizontal Application

Installation Clearances

dnE thgiRdnE tfeL

Right-Hand Discharge

Left-Hand Discharge

Top

Bottom (Floor)**

dnE thgiRdnE tfeL

Air

Flow

Air

Flow

Air

Flow

Air

Flow

Top 1

Front* 1

Back 1

Ends 1

Vent 1

Floor 1‡

*Front clearance in alcove installation must be 24 in. (610 mm). Maintain a minimum of 24 in. (610 mm) for front service access. **An 8” service clearance must be maintained below the unit to provide for servicing of the condensate trap. ‡For installations on a combustible floor, do not install the furnace directly on carpeting, tile or other combustible materials other than wood flooring.

applications with either right- or left-hand air discharge.

Refer to gure 17 for clearances in horizontal applications

Figure 17

Suspended Installation of Horizontal Unit

This furnace may be installed in either an attic or a crawlspace. Either suspend the furnace from roof rafters or

oor joists, as shown in gure 18, or install the furnace on a platform, as shown in gure 19. A horizontal suspension

kit (51W10) may be ordered from Lennox or use equivalent.

NOTE - Heavy-gauge sheet metal straps may be used to suspend the unit from roof rafters or ceiling joists. Straps are used to suspend the unit in this way, support must be provided for both the ends. The straps must not interfere with the plenum or exhaust piping installation. Cooling

coils and supply and return air plenums must be supported separately.

Page 12

HORIZONTAL SUSPENSION KIT

Metal Strap

(typical)

Internal Brace

(provided with kit)

Bracket (typical)

Air

Flow

Figure 18

NOTE - When the furnace is installed on a platform or with

the horizontal suspension kit in a crawlspace, it must be elevated enough to avoid water damage, accommodate drain trap and to allow the evaporator coil to drain.

Platform Installation of Horizontal Unit

1 - Select location for unit keeping in mind service and

other necessary clearances. See gure 17.

2 - Construct a raised wooden frame and cover frame

with a plywood sheet. If unit is installed above

nished space, fabricate an auxiliary drain pan to be

installed under unit. Set unit in drain pan as shown

in gure 19. Leave 8 inches for service clearance

below unit for condensate trap.

3 - Provide a service platform in front of unit. When

installing the unit in a crawl space, a proper support platform may be created using cement blocks.

4 - Route auxiliary drain line so that water draining from

this outlet will be easily noticed by the homeowner.

5 - If necessary, run the condensate line into a condensate

pump to meet drain line slope requirements. The pump must be rated for use with condensing furnaces. Protect the condensate discharge line

from the pump to the outside to avoid freezing.

6 - Continue with exhaust, condensate and intake piping

installation according to instructions.

Page 13

INTAKE PIPE

EXHAUST PIPE

*Gas connector may be used for Canadian

able by local authority having jurisdiction.

SERVICE PLATFORM

*GAS CONNECTION

RAISED

PLATFORM

Figure 19

Return Air -- Horizontal Applications

Return air may be brought in only through the end of a

furnace installed in the horizontal position. The furnace is

equipped with a removable bottom panel to facilitate in-

stallation. See gure 15.

Filters

This unit is not equipped with a lter or rack. A eld-provided high velocity rated lter is required for the unit to operate properly. Table 1 lists recommended lter sizes. A lter must be in place whenever the unit is operating.

IMPORTANT

If a high-efciency lter is being installed as part of this system to ensure better indoor air quality, the lter must be properly sized. High-efciency lters have a higher static pressure drop than standard efciency glass/foam lters. If the pressure drop is too great, system capacity

and performance may be reduced The pressure drop may also cause the limit to trip more frequently during

the winter and the indoor coil to freeze in the summer,

resulting in an increase in the number of service calls.

Before using any lter with this system, check the specications provided by the lter manufacturer against

the data given in the appropriate Lennox Product

Specications bulletin. Additional information is provided

in Service and Application Note ACC002 (August 2000).

Duct System

Use industry-approved standards to size and install the

supply and return air duct system. Figure 20 shows the correct supply and return duct installation. Refer to ACCA Manual D. This will result in a quiet and low-static system that has uniform air distribution.

NOTE - This furnace is not certied for operation in heating mode (indoor blower operating at selected heating speed) with an external static pressure which exceeds 0.5 inches w.c. Operation at these conditions may result in improper limit operation.

Supply Air Plenum

If the furnace is installed without a cooling coil, a removable access panel should be installed in the supply air duct. The access panel should be large enough to permit inspection of the heat exchanger. The furnace access panel must always be in place when the furnace is operating and it must not allow leaks.

Return Air Plenum

NOTE - Return air must not be drawn from a room

where this furnace, or any other gas-fueled appliance (i.e., water heater), or carbon monoxide-producing device (i.e., wood replace) is installed.

When return air is drawn from a room, a negative pressure is created in the room. If a gas appliance is operating in

a room with negative pressure, the ue products can be

pulled back down the vent pipe and into the room. This reverse ow of the ue gas may result in incomplete combustion and the formation of carbon monoxide gas. This raw gas or toxic fumes might then be distributed throughout the house by the furnace duct system.

Return air can be brought in through the bottom or either side of the furnace (return air brought into either side of

furnace allowed in upow applications only). If a furnace

with bottom return air is installed on a platform, make an airtight seal between the bottom of the furnace and the platform to ensure that the unit operates properly and safely. Use berglass sealing strips, caulking, or equivalent sealing method between the plenum and the furnace

cabinet to ensure a tight seal. If a lter is installed, size the return air duct to t the lter frame.

TABLE 1

Furnace

Cabinet Width

17-1/2” 16 X 25 X 1 (1) 16 X 25 X 1 (1)

21” 16 X 25 X 1 (1) 20 X 25 X 1 (1)

Side Return Bottom Return

Filter Size

Page 13

Page 14

SUPPLY

AIR

Duct System and Proper Installation

SUPPLY

AIR

tinU latnoziroHtinU wolfpU

Figure 20

Pipe & Fittings Specications

All pipe, ttings, primer and solvent cement must conform

with American National Standard Institute and the American Society for Testing and Materials (ANSI/ASTM) stan-

dards. The solvent shall be free owing and contain no

lumps, undissolved particles or any foreign matter that adversely affects the joint strength or chemical resistance of the cement. The cement shall show no gelation, strati-

cation, or separation that cannot be removed by stirring. Refer to the table 2 below for approved piping and tting

materials.

CAUTION

Solvent cements for plastic pipe are ammable liquids

and should be kept away from all sources of ignition. Do not use excessive amounts of solvent cement when making joints. Good ventilation should be maintained to

reduce re hazard and to minimize breathing of solvent

vapors. Avoid contact of cement with skin and eyes.

IMPORTANT

EL195UHNE exhaust and intake connections are made of PVC. Use PVC primer and solvent cement when using PVC vent pipe. When using ABS vent pipe, use transitional solvent cement to make connections to the

PVC ttings in the unit.

TABLE 2

PIPING AND FITTINGS SPECIFICATIONS

Schedule 40 PVC (Pipe) D1785

Schedule 40 PVC (Cellular Core Pipe) F891

Schedule 40 PVC (Fittings) D2466

Schedule 40 CPVC (Pipe) F441

Schedule 40 CPVC (Fittings) F438

SDR-21 PVC or SDR-26 PVC (Pipe) D2241

SDR-21 CPVC or SDR-26 CPVC (Pipe) F442

Schedule 40 ABS Cellular Core DWV (Pipe) F628

Schedule 40 ABS (Pipe) D1527

Schedule 40 ABS (Fittings) D2468

ABS-DWV (Drain Waste & Vent) (Pipe & Fittings)

PVC-DWV (Drain Waste & Vent) Pipe & Fittings)

PRIMER & SOLVENT CEMENT

PVC & CPVC Primer F656

PVC Solvent Cement D2564

CPVC Solvent Cement F493

ABS Solvent Cement D2235

PVC/CPVC/ABS All Purpose Cement For Fittings & Pipe of the same material

ABS to PVC or CPVC Transition Solvent Cement

PVC & ABS & NORYL Transition Solvent Cement WELD-ON 4052

CANADA PIPE & FITTING & SOLVENT

CEMENT

PVC & CPVC Pipe and Fittings

PVC & CPVC Solvent Cement

ABS to PVC or CPVC Transition Cement

POLYPROPYLENE VENTING SYSTEM

PolyPro® by Duravent

InnoFlue® by Centrotherm

D2661

D2665

ASTM

SPECIFICATION

D2564, D2235, F493

D3188

MARKING

ULCS636

Page 14

Page 15

Use PVC primer and solvent cement or ABS solvent ce-

ment meeting ASTM specications, refer to Table 2. As an

alternate, use all purpose cement, to bond ABS, PVC, or

CPVC pipe when using ttings and pipe made of the same

materials. Use transition solvent cement when bonding ABS to either PVC or CPVC.

Low temperature solvent cement is recommended during cooler weather. Metal or plastic strapping may be used for vent pipe hangers. Uniformly apply a liberal coat of PVC primer for PVC or use a clean dry cloth for ABS to clean

inside socket surface of tting and male end of pipe to

Canadian Applications Only - Pipe, ttings, primer and sol-

vent cement used to vent (exhaust) this appliance must be certied to ULC S636 and supplied by a single manufacturer as part of an approved vent (exhaust) system. In

addition, the rst three feet of vent pipe from the furnace ue collar must be accessible for inspection.

NOTE - The intake coupling on the furnace is ABS material. Use transitional solvent to make connections to PVC pipe.

NOTE - Vent pipe must be installed with provided vent adapter. See gure 23.

depth of tting socket.

TABLE 3

OUTDOOR TERMINATION USAGE*

STANDARD CONCENTRIC

Flush

Mount Kit

51W11

Input Size

Vent Pipe

Dia. in.

(US)

51W12

(CA)

040

060

080

100

NOTE - Standard Terminations do not include any vent pipe or elbows external to the structure. Any vent pipe or elbows external to the structure must be included in total vent length calculations. See vent length tables.

* Kits must be properly installed according to kit instructions.

1Requires eld-provided outdoor 1-1/2” exhaust accelerator.

2Concentric kits 71M80 and 44W92 include 1-1/2” outdoor accelerator, when uses with 040 and 060 input models. 3 Flush mount kits 51W11 and 51W12 includes 1-1/2 in. outdoor exhaust accelerator, required when used with 040, 060 and 080 input models.

4 Termination kits 30G28, 44W92, 4493 and 81J20 are certied to ULC S636 for use in Canada only.

5 See table 8 for vent accelerator requirements.

2 YES YES YES

3 YES YES

YES YES

YES YES YES

Wall Kit

2 inch 3 inch 2 inch

22G44

(US)

30G28

(CA)

44J40

(US)

81J20

(CA)

YES

Wall Ring

Kit

15F74

YES

1-1.2 inch 2 inch 3 inch

Field

Fabricated

YES

YES YES YES

71M80

(US)

44W92

(CA)

YES

69M29

(US)

44W92

(CA)

60L46 (US)

44W93 (CA)

Page 15

Page 16

Joint Cementing Procedure

All cementing of joints should be done according to the

specications outlined in ASTM D 2855.

Venting Practices

Piping Suspension Guidelines

DANGER

DANGER OF EXPLOSION!

Fumes from PVC glue may ignite during system check. Allow fumes to dissipate for at least 5 minutes before placing unit into operation.

1 - Measure and cut vent pipe to desired length. 2 - Debur and chamfer end of pipe, removing any ridges

or rough edges. If end is not chamfered, edge of pipe

may remove cement from tting socket and result in

a leaking joint.

NOTE - Check the inside of vent pipe thoroughly for any obstruction that may alter furnace operation.

3 - Clean and dry surfaces to be joined.

4 - Test t joint and mark depth of tting on outside of

pipe.

5 - Uniformly apply a liberal coat of PVC primer for PVC

or use a clean dry cloth for ABS to clean inside socket

surface of tting and male end of pipe to depth of tting socket.

NOTE - Time is critical at this stage. Do not allow primer to dry before applying cement.

6 - Promptly apply solvent cement to end of pipe and

inside socket surface of tting. Cement should be

applied lightly but uniformly to inside of socket. Take care to keep excess cement out of socket. Apply second coat to end of pipe.

7 - Immediately after applying last coat of cement to

pipe, and while both inside socket surface and end of pipe are wet with cement, forcefully insert end of pipe into socket until it bottoms out. Turn PVC pipe 1/4 turn during assembly (but not after pipe is fully inserted) to distribute cement evenly. DO NOT turn ABS or cellular core pipe.

NOTE - Assembly should be completed within 20 seconds after last application of cement. Hammer blows should not be used when inserting pipe.

8 - After assembly, wipe excess cement from pipe at

end of tting socket. A properly made joint will show

a bead around its entire perimeter. Any gaps may

indicate an improper assembly due to insufcient

solvent.

9 - Handle joints carefully until completely set.

SCHEDULE 40

PVC - 5'

all other pipe* - 3'

* See Piping and Fittings Specifications table

NOTE - Isolate piping at the point where it exits the outside wall or roof in order to prevent transmission of vibration to the structure.

Wall Thickness Guidelines

24” maximum 3/4” minimum

Wall

Figure 21

1 - In areas where piping penetrates joists or interior

walls, hole must be large enough to allow clearance on all sides of pipe through center of hole using a hanger.

2 - When furnace is installed in a residence where unit

is shut down for an extended period of time, such as a vacation home, make provisions for draining condensate collection trap and lines.

edistuoedisni

Page 16

Page 17

appliance.

REPLACING FURNACE THAT WAS PART OF A

CHIMNEY

OR GAS

VENT

(Check sizing

for water

heater only)

FURNACE

(Replaced)

If replacing a furnace which was commonly vented with another gas appliance, the size of the existing vent pipe for that gas appliance must be checked. Without the heat of the original furnace flue products, the existing vent pipe is probably oversized for the single water heater or other appliance. The vent should be checked for proper draw with the remaining

COMMON VENT SYSTEM

WATER

HEATER

OPENINGS

(To Adjacent

Room)

Figure 22

Exhaust Piping (Figures 23, 26 and 27)

The vent adapter must be attached to the exhaust coupling on the furnace top panel. Use provided bands. See steps below.

1 - Remove the caution tag from vent adapter. 2 - Fully insert vent adapter with both bands loosely

attached on the furnace exhaust coupling

3 - Insert PVC exhaust pipe through vent adapter. Ensure

vent pipe is fully seated into exhaust coupling.

4 - Tighten both top and bottom bands to 40in-lbs.

NOTE - PVC / ABS / NORYL transition solvent cement WELD-ON 4052 (or equivalent) must be used for connecting PVC exhaust pipe to NORYL furnace exhaust coupling.

Route piping to outside of structure. Continue with installation following instructions given in piping termination section.

CAUTION

Do not discharge exhaust into an existing stack or stack that also serves another gas appliance. If vertical discharge through an existing unused stack is required, insert PVC pipe inside the stack until the end is even with the top or outlet end of the metal stack.

CAUTION

The exhaust vent pipe operates under positive pressure and must be completely sealed to prevent leakage of combustion products into the living space.

Vent Adaptor To Exhaust Coupling

PVC

Exhaust Pipe

Top Band

(torque to 40in-lbs)

Bottom Band

(torque to 40in-lbs)

Vent

Adaptor

Furnace

Exhaust Coupling

Furnace

Top Panel

Figure 23

Vent Piping Guidelines

NOTE - Lennox has approved the use of DuraVent® and Centrotherm manufactured vent pipe and terminations as an option to PVC. When using the PolyPro® by DuraVent or InnoFlue® by Centrotherm venting system the vent pipe requirements stated in the unit installation instruction – minimum & maximum vent lengths, termination clearances, etc. – apply and must be followed. Follow the instructions provided with PoyPro by DuraVent and InnoFlue by Centrotherm venting system for assembly or if requirements are more restrictive. The PolyPro by Duravent and InnoFlue by Centrotherm venting system must also follow the uninsulated and unconditioned space criteria listed in table 7.

The EL195UHNE can be installed as either a Non-Direct Vent or a Direct Vent gas central furnace.

NOTE - In Non-Direct Vent installations, combustion air

is taken from indoors and ue gases are discharged outdoors. In Direct Vent installations, combustion air is taken from outdoors and ue gases are discharged outdoors.

Intake and exhaust pipe sizing -- Size pipe according to

tables 4 and 5. Count all elbows inside and outside the home. Table 4 lists the minimum vent pipe lengths permitted. Table 5 lists the maximum pipe lengths permitted. Regardless of the diameter of pipe used, the standard roof and wall terminations described in section Exhaust Piping Terminations should be used. Exhaust vent termi-

nation pipe is sized to optimize the velocity of the exhaust

gas as it exits the termination. Refer to table 8. In some applications which permit the use of several dif-

ferent sizes of vent pipe, a combination vent pipe may be

used. Contact Lennox’ Application Department for assis-

tance in sizing vent pipe in these applications.

Page 17

Page 18

NOTE - The exhaust collar on all models is sized to ac-

Pipe Size Process

commodate 2” Schedule 40 vent pipe. In horizontal applications, any transition to exhaust pipe larger than 2” must be made in vertical runs of the pipe. Therefore a 2” elbow must be added before the pipe is transitioned to any size larger than 2”. This elbow must be added to the elbow count used to determine acceptable vent lengths. Contact the Application Department for more information concerning sizing of vent systems which include multiple pipe sizes.

Horizontal Installation Offset Requirements

Exhaust Pipe

Use the following steps to correctly size vent pipe diameter.

What is the

furnace capacity?

040, 060, 080, or

100?

Which style termination

being used?

Standard or concentric?

See table 3..

Horizontal

Gas Furnace

NOTE -

ward unit. A minimum of 1/4” (6mm) drop for each 12” (305mm) of horizontal run is mandatory for drainage.

NOTE - Exhaust pipe MUST be glued to furnace exhaust fittings.

NOTE - Exhaust piping should be checked carefully to make

sure there are no sags or low spots.

12” ma x

of straight pip

12”Min.

Figure 24

TABLE 4

MINIMUM VENT PIPE LENGTHS

ML195UH Model MIN. VENT LENGTH*

040, -060, -080, 100

*Any approved termination may be added to the minimum length listed.

15 ft. or 5 ft. plus 2 elbows

or 10 ft. plus 1 elbow

Which needs

most elbows?

Intake or exhaust?

How many elbows? Count all elbows inside

and outside house.

Desired pipe size?

2” or 3”

What is the altitude of

the furnace installation?

Use table 5 or 6 to find max intake or exhaust pipe

length. Includes all vent pipe and elbows inside and outside the house.

Figure 25

CAUTION

Do not use screens or perforated metal in exhaust or

intake terminations. Doing so will cause freeze-ups and

may block the terminations.

Page 18

Page 19

TABLE 5

NOTE - Size intake and exhaust pipe length separately. Values in table are for Intake OR Exhaust, not combined total. Both Intake and Exhaust must be same pipe size.

NOTE - Additional vent pipe and elbows used to terminate the vent pipe outside the structure must be included in the total vent length calculation.

Standard Termination at Elevation 0 - 4500 ft

2” Pipe 3” Pipe

Number Of 90° Elbows

Model Model

040 060 080 100 040 060 080 100

1 81 66 44 24 138 137 118 118

2 76 61 39 19 133 132 113 113

3 71 56 34 14 128 127 108 108

4 66 51 29

5 61 46 24 118 117 98 98

6 56 41 19 113 112 93 93

7 51 36 14 108 107 88 88

8 46 31

9 41 26 98 97 78 78

10 36 21 93 92 73 73

n/a

123 122 103 103

103 102 83 83

Concentric Termination at Elevation 0 - 4500 ft

2” Pipe 3” Pipe

Number Of 90° Elbows

Model Model

040 060 080 100 040 060 080 100

1 73 58 42 22 121 121 11 4 114

2 68 53 37 17 116 116 109 109

3 63 48 32 12 111 111 104 104

4 58 43 27

5 53 38 22 101 101 94 94

6 48 33 17 96 96 89 89

7 43 28 12 91 91 84 84

8 38 23

9 33 18 81 81 74 74

10 28 13 76 76 69 69

n/a

106 106 99 99

86 86 79 79

Page 19

Page 20

TABLE 6

Maximum Allowable Exhaust Vent Lengths With Furnace Installed in a Closet or Basement Using Ventilated

Attic or Crawl Space For Intake Air in Feet

NOTE - Additional vent pipe and elbows used to terminate the vent pipe outside the structure must be included in the total vent length calculation.

Standard Termination at Elevation 0 - 4500 ft

2” Pipe 3” Pipe

Number Of 90° Elbows

Model Model

040 060 080 100 040 060 080 100

1 71 56 34 14 118 117 98 98

2 66 51 29 9 113 112 93 93

3 61 46 24 4 108 107 88 88

4 56 41 19

5 51 36 14 98 97 78 78

6 46 31 9 93 92 73 73

7 41 26 4 88 87 68 68

8 36 21

9 31 16 78 77 58 58

10 26 11 73 72 53 53

n/a

103 102 83 83

83 82 63 63

Page 20

Page 21

TYPICAL EXHAUST AND INTAKE PIPE CONNECTIONS IN UPFLOW DIRECT OR

NON-DIRECT VENT APPLICATIONS

* When transitioning up in pipe size, use the shortest length of 2” PVC pipe possible.

EXHAUST

2”

Appliance Adaptor

2”

INTAKE

EXHAUSTINTAKE

TRANSITION

3”

*2”

Appliance Adaptor

*2”

TRANSITION

Figure 26

2”

DO NOT transition

from smaller to larger

3”

pipe in horizontal runs

of exhaust pipe.

TYPICAL EXHAUST AND INTAKE PIPE CONNECTIONS IN HORIZONTAL DIRECT OR NON-DIRECT VENT

APPLICATIONS

12” max.

EXHAUST

2”

INTAKE

2”

DO NOT transition

from smaller to larger

pipe in horizontal runs

of exhaust pipe.

* When transitioning up in pipe size, use the shortest length of 2” PVC pipe possible.

(RIGHT HAND DISCHARGE SHOWN)

2”

Appliance Adaptor

45°

MAX

SIDE VIEW

45°

MAX

EXHAUST

2”

3”

*2”

Appliance Adaptor

INTAKE

Figure 27

Page 21

Page 22

Intake Piping

TYPICAL AIR INTAKE PIPE CONNECTIONS

The EL195UHNE furnace may be installed in either direct vent or non-direct vent applications. In non-direct vent

applications, when intake air will be drawn into the furnace from the surrounding space, the indoor air quality must be considered and guidelines listed in Combustion, Dilution and Ventilation Air section must be followed.

Follow the next two steps when installing the unit in Direct Vent applications, where combustion air is taken from

outdoors and ue gases are discharged outdoors. The provided air intake screen must not be used in direct vent applications (outdoors).

1 - Use transition solvent cement or a sheet metal screw

to secure the intake pipe to the inlet air connector.

2 - Route piping to outside of structure. Continue with

installation following instructions given in general guidelines for piping terminations and intake and exhaust piping terminations for direct vent sections.

Refer to table 5 for pipe sizes.

Follow the next two steps when installing the unit in NonDirect Vent applications where combustion air is taken

from indoors and ue gases are discharged outdoors.

1 - Use eld-provided materials and the factory-provided

air intake screen to route the intake piping as shown

in gure 28 or 29. Maintain a minimum clearance

of 3” (76mm) around the air intake opening. The air intake opening (with the protective screen) should always be directed forward or to either side in the

upow position, and either straight out or downward in the horizontal position. The air intake piping must not terminate too close to the ooring or a platform.

Ensure that the intake air inlet will not be obstructed by loose insulation or other items that may clog the debris screen.

2 - If intake air is drawn from a ventilated attic (gure

30) or ventilated crawlspace (gure 31) the exhaust

vent length must not exceed those listed in table 6. If 3” diameter pipe is used, reduce to 2” diameter pipe at the termination point to accommodate the debris screen.

3 - Use a sheet metal screw to secure the intake pipe to

the connector, if desired.

TYPICAL AIR INTAKE PIPE CONNECTIONS

UPFLOW NON−DIRECT

VENT APPLICATIONS

INTAKE

DEBRIS

SCREEN

(Provided)

NOTE - Debris screen and elbow may be rotated, so that screen may be positioned to face forward or to either side.

Figure 28

HORIZONTAL NON−DIRECT VENT APPLICATIONS

(Horizontal Right−Hand Air Discharge Application Shown)

INTAKE

DEBRIS

SCREEN

(Provided)

NOTE - Debris screen may be positioned with elbow rotated to face down or face up.

Figure 29

Page 22

Page 23

CAUTION

hour of the total input rating of all equipment in the enclosure.

EQUIPMENT IN CONFINED SPACE

If this unit is being installed in an application with combustion air coming in from a space serviced by an exhaust fan, power exhaust fan, or other device which may create a negative pressure in the space, take care

when sizing the inlet air opening. The inlet air opening must be sized to accommodate the maximum volume

of exhausted air as well as the maximum volume of combustion air required for all gas appliances serviced by this space.

(Inlet Air from Ventilated Attic and Outlet Air to Outside)

Roof Terminated

Exhaust Pipe

NOTE-The inlet and outlet air openings shall each have a free area of at least one square inch per 4,000 Btu (645mm hour of the total input rating of all equipment in the enclosure.

(Inlet Air from Ventilated Crawlspace and Outlet Air to Outside)

Roof Terminated

Exhaust Pipe

Ventilation

Louvers

(Crawl space)

EQUIPMENT IN CONFINED SPACE

*Intake Debris

Furnace

Figure 30

Furnace

Coupling or 3 in. to 2 in.

Transition

(Field Provided)

*Intake Debris Screen Provided)

Ventilation Louvers

12 in.(305mm) Above

Screen

(Provided)

per 1.17kW) per

Inlet Air

(Minimum

12 in.(305mm)

Above crawl

space floor)

Inlet Air

(Minimum

attic floor)

General Guidelines for Vent Terminations

In Non-Direct Vent applications, combustion air is taken

from indoors and the ue gases are discharged to the outdoors. The EL195UHNE is then classied as a non-direct

vent, Category IV gas furnace. In Direct Vent applications, combustion air is taken from

outdoors and the ue gases are discharged to the outdoors. The EL195UHNE is then classied as a direct vent,

Category IV gas furnace. In both Non-Direct Vent and Direct Vent applications, the

vent termination is limited by local building codes. In the absence of local codes, refer to the current National Fuel Gas Code ANSI Z223-1/NFPA 54 in U.S.A., and current CSA-B149 Natural Gas and Propane Installation Codes in Canada for details.

Position termination according to location given in gure

33 or 34. In addition, position termination so it is free from any obstructions and 12” above the average snow accumulation.

At vent termination, care must be taken to maintain protective coatings over building materials (prolonged exposure to exhaust condensate can destroy protective coatings). It is recommended that the exhaust outlet not be located within 6 feet (1.8m) of an outdoor AC unit because the condensate can damage the painted coating.

NOTE - See table 7 for maximum allowed exhaust pipelength without insulation in unconditioned space during winter design temperatures below 32°F (0°C). If required exhaust pipe should be insulated with 1/2” (13mm) Armaex or equivalent. In extreme cold climate areas, 3/4” (19mm) Armaex or equivalent may be necessary. Insulation must be protected from deterioration. Armaex with UV protection is permissible. Basements or other enclosed areas that are not exposed to the outdoor ambient temperature and are above 32 degrees F (0°C) are to be considered conditioned spaces.

IMPORTANT

Do not use screens or perforated metal in exhaust

terminations. Doing so will cause freeze-ups and may

block the terminations.

IMPORTANT

For Canadian Installations Only: In accordance to CSA International B149 installation

codes, the minimum allowed distance between the combustion air intake inlet and the exhaust outlet of other appliances shall not be less than 12 inches (305mm).

NOTE-The inlet and outlet air openings shall each have a free area of at least one square inch per 4,000 Btu (645mm

Figure 31

per 1.17kW) per

Page 23

Page 24

TABLE 7

Maximum Allowable Exhaust Vent Pipe Length (in ft.) Without Insulation In Unconditioned Space For

Winter Design Temperatures Single - Stage High Efciency Furnace

Winter Design

Temp1 °F (°C)

32 to 21

(0 to -6)

20 to 1

(-7 to -17)

0 to -20

(-18 to -29)

1Refer to 99% Minimum Design Temperature table provided in the current edition of the ASHRAE Fundamentals Handbook.

2 Poly-Propylene vent pipe (PP) by Duravent and Centrotherm.

NOTE - Concentric terminations are the equivalent of 5’ and should be considered when measuring pipe length.

NOTE - Maximum uninsulated vent lengths listed may include the termination(vent pipe exterior to the structure) and cannot exceed 5 linear feet or the maximum allowable intake or exhaust vent length listed in table 5 or 6 which ever is less.

NOTE - - If insulation is required in an unconditioned space, it must be located on the pipe closest to the furnace. See gure32.

Vent

Pipe Diam

2 in 18 16 31 28 50 48 30 30

3 in 9 9 18 18 35 35 47 47

2 in 9 8 18 16 32 29 30 30

3 in N/A 8 8 19 19 26 26

2 in 5 12 10 22 19 30 27

3 in N/A N/A N/A 10 10 16 16

040 060 080 100

PVC

Unit Input Size

PVC

Conditioned

Space

Conditioned

Space

Figure 32

Pipe Insulation

Unconditioned

Space

Exhaust

Pipe

Intake

Pipe

Page 24

Page 25

VENT TERMINATION CLEARANCES

FOR NON-DIRECT VENT INSTALLATIONS IN THE US AND CANADA

INSIDE CORNER

DETAIL

Fixed

Closed

Operable

VENT TERMINAL

AIR SUPPLY INLET

US Installations

A =

Clearance above grade, veranda,

porch, deck or balcony

B =

C =

D =

E =

F =

G =

H =

I =

J =

Clearance to window or

door that may be opened

Clearance to permanently

closed window

Vertical clearance to ventilated soffit

located above the terminal within a

horizontal distance of 2 feet (610 mm)

from the center line of the terminal

Clearance to unventilated soffit

Clearance to outside corner

Clearance to inside corner

tended above meter / regulator assembly

Clearance to service regulator

vent outlet

Clearance to non-mechanical air

12 inches (305mm) or 12 in. (305mm)

above average snow accumulation.

4 feet (1.2 m) below or to side of opening;

1 foot (30cm) above opening

* 12”

* Equal to or greater than soffit depth.

* No minimum to outside corner * No minimum to outside corner

3 feet (.9m) within a height 15 feet (4.5m)

above the meter / regulator assembly

* 3 feet (.9m)

4 feet (1.2 m) below or to side of opening;

1 foot (30 cm) above opening

pliance

K =

L =

Clearance above paved sidewalk or

paved driveway located on public property

M =

Clearance under veranda, porch, deck or balcony

In accordance with the current ANSI Z223.1/NFPA 54 Natural Fuel Gas Code

In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code † A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.

‡ Permitted only if veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor. Lennox recommends avoiding this location if possible.

ply inlet

3 feet (.9m) above if within 10 feet

(3m) horizontally

7 feet (2.1m)†

*12 inches (305mm)‡

Fixed

Closed

AREA WHERE TERMINAL IS NOT PERMITTED

12 inches (305mm) or 12 in. (305mm)

above average snow accumulation.

6 inches (152mm) for appliances <10,000

Btuh (3kw), 12 inches (305mm) for

appliances > 10,000 Btuh (3kw) and

<100,000 Btuh (30kw), 36 inches (.9m)

for appliances > 100,000 Btuh (30kw)

Canadian Installations

* 12”

* Equal to or greater than soffit depth.

3 feet (.9m) within a height 15 feet (4.5m)

above the meter / regulator assembly

3 feet (.9m)

6 inches (152mm) for appliances <10,000

Btuh (3kw), 12 inches (305mm) for

appliances > 10,000 Btuh (3kw) and

<100,000 Btuh (30kw), 36 inches (.9m)

for appliances > 100,000 Btuh (30kw)

6 feet (1.8m)

7 feet (2.1m)†

12 inches (305mm)‡

*For clearances not specified in ANSI Z223.1/NFPA 54 or CSA B149.1, clearance will be in accordance with local installation codes and the requirements of the lation instructions.”

Figure 33

Page 25

Page 26

VENT TERMINATION CLEARANCES

FOR DIRECT VENT INSTALLATIONS IN THE US AND CANADA

INSIDE CORNER

DETAIL

Fixed

Closed

Operable

VENT TERMINAL

AIR SUPPLY INLET

US Installations

A =

Clearance above grade, veranda,

porch, deck or balcony

B =

Clearance to window or

door that may be opened

12 inches (305mm) or 12 in. (305mm)

above average snow accumulation.

6 inches (152mm) for appliances <10,000

pliances > 10,000 Btuh (3kw) and <50,000

pliances > 50,000 Btuh (15kw)

C =

D =

E =

F =

G =

H =

I =

J =

K =

L =

M =

In accordance with the current ANSI Z223.1/NFPA 54 Natural Fuel Gas Code

In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code

† A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.

‡ Permitted only if veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor. Lennox recommends avoiding this location if possible.

Clearance to permanently

closed window

Vertical clearance to ventilated soffit

located above the terminal within a

horizontal distance of 2 feet (610mm)

from the center line of the terminal

Clearance to unventilated soffit

Clearance to outside corner

Clearance to inside corner

tended above meter / regulator assembly

Clearance to service regulator

vent outlet

3 feet (.9m) within a height 15 feet (4.5m)

Clearance to non-mechanical air

pliance

pliances > 10,000 Btuh (3kw) and <50,000

ply inlet

Clearance above paved sidewalk or

paved driveway located on public property

Clearance under veranda, porch, deck or balcony

* Equal to or greater than soffit depth

* Equal to or greater than soffit depth* Equal to or greater than soffit depth

* No minimum to outside corner

above the meter / regulator assembly

6 inches (152mm) for appliances <10,000

pliances > 50,000 Btuh (15kw)

3 feet (.9m) above if within 10 feet

* 12”

3 feet (.9m)

(3m) horizontally

* 7 feet (2.1m)

*12 inches (305mm)‡

Fixed

Closed

AREA WHERE TERMINAL IS NOT PERMITTED

12 inches (305mm) or 12 in. (305mm)

above average snow accumulation.

6 inches (152mm) for appliances <10,000

Btuh (3kw), 12 inches (305mm) for

appliances > 10,000 Btuh (3kw) and

<100,000 Btuh (30kw), 36 inches (.9m)

for appliances > 100,000 Btuh (30kw)

Canadian Installations

* 12”

* Equal to or greater than soffit depth* Equal to or greater than soffit depth

* No minimum to outside corner

3 feet (.9m) within a height 15 feet (4.5m)

above the meter / regulator assembly

3 feet (.9m)

6 inches (152mm) for appliances <10,000

Btuh (3kw), 12 inches (305mm) for

appliances > 10,000 Btuh (3kw) and

<100,000 Btuh (30kw), 36 inches (.9m)

for appliances > 100,000 Btuh (30kw)

6 feet (1.8m)

7 feet (2.1m)†

12 inches (305mm)‡

*For clearances not specified in ANSI Z223.1/NFPA 54 or CSA B149.1, clearance will be in accordance with local installation codes and the requirements of the gas supplier and these installation instructions.”

Figure 34

Page 26

Page 27

Details of Intake and Exhaust Piping Terminations for

(15F75 or 44J41)

Direct Vent Installations

Inches(mm)

3”(76mm) MAX.

NOTE - In Direct Vent installations, combustion air is taken

from outdoors and ue gases are discharged to outdoors. NOTE - Flue gas may be slightly acidic and may adverse-

ly affect some building materials. If any vent termination is used and the ue gasses may impinge on the building material, a corrosion-resistant shield (minimum 24 inches square) should be used to protect the wall surface. If the optional tee is used, the protective shield is recommended. The shield should be constructed using wood, plastic, sheet metal or other suitable material. All seams, joints, cracks, etc. in the affected area should be sealed using an appropriate sealant. See gure 43.

Intake and exhaust pipes may be routed either horizontally through an outside wall or vertically through the roof. In attic or closet installations, vertical termination through the roof is preferred. Figures 35 through 42 show typical terminations.

1 - Intake and exhaust terminations are not required

to be in the same pressure zone. You may exit the

intake on one side of the structure and the exhaust

on another side (gure 36). You may exit the

exhaust out the roof and the intake out the side of

the structure (gure 37).

2 - Intake and exhaust pipes should be placed as close

together as possible at termination end (refer to illustrations). Maximum separation is 3” (76mm) on roof terminations and 6” (152mm) on side wall terminations.

NOTE - When venting in different pressure zones, the maximum separation requirement of intake and exhaust pipe DOES NOT apply.

3 - On roof terminations, the intake piping should

terminate straight down using two 90° elbows (See

gure 35).

4 - Exhaust piping must terminate straight out or up as

shown. A reducer may be required on the exhaust piping at the point where it exits the structure to improve the velocity of exhaust away from the intake piping. See table 8.

NOTE - Care must be taken to avoid recirculation of exhaust back into intake pipe.

5 - On eld-supplied terminations for side wall exit,

exhaust piping may extend a maximum of 12 inches (305mm) for 2” PVC and 20 inches (508mm) for 3” (76mm) PVC beyond the outside wall. Intake piping

should be as short as possible. See gure 43.

6 - On eld-supplied terminations, a minimum distance

between the end of the exhaust pipe and the end of the intake pipe without a termination elbow is 8” and a minimum distance of 6” with a termination elbow.

See gure 43.

UNCONDITIONED

8” (203mm) MIN

12” (305mm) ABOVE

AVERAGE SNOW ACCUMULATION

3” (76mm) OR

2” (51mm) PVC

PROVIDE SUPPORT

FOR INTAKE AND

EXHAUST LINES

DIRECT VENT ROOF TERMINATION KIT

ATTIC SPACE

Figure 35

Exiting Exhaust and Intake Vent

(different pressure zone)

Exhaust

Pipe

Furnace

Inlet Air

(Minimum 12 in.

305 MM) above

grade or snow

accumulation

Figure 36

Exiting Exhaust and Intake Vent

(different pressure zone)

Roof T

erminated

Exhaust Pipe

Inlet Air

Furnace

(Minimum 12 in. 305 MM) above

grade or snow

accumulation

Figure 37

TABLE 8

EXHAUST PIPE TERMINATION SIZE REDUCTION

EL195UHNE Model Termination Pipe Size

*040, *060 1-1/2” (38mm)

*080

100

*Use the provided 1-1/2” accelerator if matched with the ushmount termination.

2” (51mm)

Page 27

Page 28

7 - If intake and exhaust piping must be run up a side

51W11 (US) or 51W12 (Canada)

41W92 or 41W93 (Canada)

FIELD-PROVIDED

(30G28 or 81J20)

DIRECT VENT APPLICATION

wall to position above snow accumulation or other obstructions, piping must be supported. At least one bracket must be used within 6” from the top of the

elbow and then every 24” (610mm) as shown in gure

43, to prevent any movement in any direction. When exhaust and intake piping must be run up an outside wall, the exhaust piping must be terminated with pipe

sized per table 8.The intake piping may be equipped

with a 90° elbow turndown. Using turndown will add 5 feet (1.5m) to the equivalent length of the pipe.

8 - A multiple furnace installation may use a group of up

to four terminations assembled together horizontally, as shown in gure 41.

2” EXTENSION FOR 2” PVC PIPE1” EXTENSION FOR 3” PVC PIPE

4''

FURNACE EXHAUST

PIPE

QUIRED TO ADAPT

LARGER VENT PIPE

SIZE TO TERMINATION.

EXHAUST

AIR

INTAKE

AIR

OUTSIDE

WALL

CLAMP

(Not Furnished)

INTAKE

AIR

INTAKE

AIR

DIRECT VENT CONCENTRIC WALL TERMINATION

71M80, 69M29 or 60L46 (US)

Figure 40

EXHAUST

AIR

12” (305mm) Min.

above grade or

cumulation.

GRADE

FURNACE

INTAKE

PIPE

FLUSH-MOUNT SIDE WALL TERMINATION KIT

Figure 38

12” (305mm)

Minimum

Above Average

Snow

Accumulation

CLAMP

DIRECT VENT CONCENTRIC ROOFTOP TERMINATION

71M80, 69M29 or 60L46 (US)

44W92 or 44W93 (Canada)

GLUE EXHAUST

END FLUSH INTO

TERMINATION

FLAT SIDE

INTAKE

1-1/2” ACCELERATOR

FLASHING

(Not Furnished)

SHEET METAL STRAP

(Clamp and sheet metal strap must be field−installed to support the weight of the termination kit.)

FIELD-PROVIDED

REDUCER MAY BE REQUIRED

TO ADAPT LARGER VENT

PIPE SIZE TO TERMINATION

EXHAUST

VENT

5”

(127mm)

5-1/2”

(140mm)

12”

(305mm)

INTAKE

AIR

18” MAX.

(457mm)

Front View

EXHAUST VENT

12” (305mm) Min.

above grade or

Inches (mm)

INTAKE

cumulation.

AIR

optional intake elbow

Side View

OPTIONAL VENT TERMINATION FOR MULTIPLE UNIT

INSTALLATION OF DIRECT VENT WALL TERMINATION KIT

Figure 41

USING EXISTING CHIMNEY

8” - 12”

(203mm - 305mm)

Minimum 12” (305MM)

above chimney top

plate or average snow

accumulation

INTAKE PIPE

INSULATION (optional)

SHEET

METAL TOP

PLATE

INSULATE

TO FORM

SEAL

3” - 8”

(76mm-

203mm)

STRAIGHT-CUT OR

ANGLE-CUT IN DIRECTION

OF ROOF SLOPE *

SHOULDER OF FITTINGS

PROVIDE SUPPORT

OF PIPE ON TOP PLATE

3” - 8” (76mm203mm)

ALTERNATE INTAKE PIPE

EXTERIOR

PORTION OF

CHIMNEY

Figure 39

Page 28

NOTE - Do tical discharge through an existing unused chimney or stack is required, insert piping inside trated. In any exterior portion of chimney, the exhaust vent must be insulated.

Figure 42

Page 29

NOTE − FIELD−PROVIDED

REQUIRED TO ADAPT

LARGER VENT PIPE SIZE

* WALL

SUPPORT

FIELD FABRICATED WALL TERMINATION

REDUCER MAY BE

TO TERMINATION

STRAIGHT

APPPLICATION

EXTENDED

APPLICATION

Intake

Elbow

A− Minimum clearance

above grade or average

snow accumulation

B− Maximum horizontal separation between

intake and exhaust

C1 -Minimum from end of

exhaust to inlet of intake

C2 -Minimum from end of

exhaust to inlet of intake

D− Maximum exhaust

pipe length

E− Maximum wall support

distance from top of each

pipe (intake/exhaust)

See maximum allowable venting tables for venting lengths with this arrangement.

* Use wall support every 24” (610 mm). Use two wall supports if extension is greater than

24” (610 mm) but less than 48” (1219 mm). NOTE − One wall support must be within 6” (152 mm) from top of each pipe (intake and exhaust) to prevent movement in any direction.

ALTERNATE TERMINATIONS (TEE & FORTY−FIVE DEGREE ELBOWS ONLY)

Exhaust

12”

The exhaust termination tee should be connected to the 2” or 3” PVC flue pipe as shown in the illustration. In horizontal tee applications there must be be a minimum of 3 ft away from covered patios or any living ares and

cannot be within 3 ft of a window. Do not use an accelerator in applications that include an exhaust termination tee. The accelerator is not required.

As required. Flue gas may be acidic and may adversely affect some building materials. If a side wall vent termination is used and flue gases will impinge on the building materials, a corrosion−resistant shield (24 inches square) should be used to protect the wall surface. If optional tee is used, the protective shield is recommended. The shield should be constructed using wood, sheet metal or other suitable material. All seams, joints, cracks, etc. in affected area, should be sealed using an appropriate sealant.

Exhaust pipe 45° elbow can be rotated to the side away from the combustion air inlet to direct exhaust away from adjacent property. The exhaust must never be directed toward the combustion air inlet.

Intake Elbow

12”

A− Clearance above

grade or average snow

accumulation

B− Horizontal

separation between

intake and exhaust

C− Minimum from

end of exhaust to

inlet of intake

D− Exhaust pipe length

E− Wall support distance

from top of each pipe

(intake/exhaust)

Front View of

Intake and Exhaust

Intake

Exhaust

2” (51mm)

Vent Pipe

12” (305 mm)

6” (152 mm)

2” (51MM)

Vent Pipe

12” (305 mm) Min.12” (305 mm) Min.

6” (152 mm) Min. 24” (610 mm) Max.

9” (227 mm) Min.

12” (305 mm) Min. 16” (405 mm) Max.

6” (152 mm) Max.

3” (76mm)

Vent Pipe

12” (305 mm)

6” (152 mm)6” (152 mm)

8” (203 mm)8” (203 mm)

6” (152 mm)6” (152 mm)

20” (508 mm)

6” (152 mm)

3” (76MM)

Vent Pipe

6” (152 mm) Min. 24” (610 mm) Max.

9” (227 mm) Min.

12” (305 mm) Min. 20” (508 mm) Max.

6” (152 mm) Max.

Figure 43

Page 29

Page 30

Details of Exhaust Piping Terminations for Non-Direct

(15F75 or 44J41)

trated. In any exterior portion of chimney, the exhaust vent must be insulated.

NON-DIRECT VENT APPLICATION

Vent Applications

Exhaust pipes may be routed either horizontally through

an outside wall or vertically through the roof. In attic or closet installations, vertical termination through the roof is preferred. Figures 44 and 45 show typical terminations.

1 - Exhaust piping must terminate straight out or up as

shown. The termination pipe must be sized as listed in table 8.The specied pipe size ensures proper

velocity required to move the exhaust gases away from the building.

2 - On eld supplied terminations for side wall exit,

exhaust piping may extend a maximum of 12 inches (305mm) for 2” PVC and 20 inches (508mm) for 3” (76mm) PVC beyond the outside wall.

3 - If exhaust piping must be run up a side wall to position

above snow accumulation or other obstructions, piping must be supported every 24 inches (610mm). When exhaust piping must be run up an outside wall,

any reduction in exhaust pipe size must be done after the nal elbow.

4 - Distance between exhaust pipe terminations on

multiple furnaces must meet local codes.

USING EXISTING CHIMNEY

STRAIGHT-CUT OR

ANGLE-CUT IN DIRECTION

OF ROOF SLOPE

Minimum 12” (305MM)

above chimney top

plate or average snow

accumulation

SHEET

METAL TOP

PLATE

INSULATE

TO FORM

SEAL

NOTE - Do tical discharge through an existing unused chimney or stack is required, insert piping inside

SHOULDER OF FITTINGS

PROVIDE SUPPORT

OF PIPE ON TOP PLATE

EXTERIOR

PORTION OF

CHIMNEY

Figure 45

12” (305mm) ABOVE AVE.

SNOW

ACCUMULATION

3” (76mm) OR

2” (51mm) PVC

PROVIDE SUPPORT

FOR EXHAUST LINES

NON-DIRECT VENT ROOF TERMINATION KIT

UNCONDITIONED

ATTIC SPACE

Figure 44

Crawl Space and Extended Horizontal Venting

Lennox provides kit 51W18 (USA) kit 15Z70 (Canada) to

install 2” or 3” PVC exhaust piping through the oor joists and into the crawl space. See gure 46. This kit can also

be used as a supplemental drain for installations with con-

densate run back in the vent pipe (ie. long horizontal runs,

unconditioned spaces, etc.).

Venting In A Crawl Space

Basement Floor

KIT 51W18

(USA)

KIT 15Z70

(CANADA)

Figure 46

Condensate Piping

This unit is designed for either right- or left-side exit of

condensate piping in upow applications. In horizontal

applications, the condensate trap must extend below the unit. An 8” service clearance is required for the condensate trap.

Page 30

Page 31

Refer to gures 47 and 49 for condensate trap locations.

CONDENSATE TRAP AND PLUG LOCATIONS

avoid interference.

Field Provided Drain Components

Figure 55 shows trap assembly using 1/2” PVC or 3/4” PVC.

NOTE - If necessary the condensate trap may be installed up to 5’ away from the furnace. Use PVC pipe to connect trap to furnace condensate outlet. Piping from furnace must slope down a minimum of 1/4” per ft. toward trap.

1 - Determine which side condensate piping will exit

the unit, location of trap, eld-provided ttings and

length of PVC pipe required to reach available drain.

2 - Use a large at head screw driver or a 1/2” drive

socket extension and remove plug (gure 47) from

the cold end header box at the appropriate location on the side of the unit. Install provided 3/4 NPT street

elbow tting into cold end header box. Use Teon

tape or appropriate pipe dope.

NOTE - Cold end header box drain plugs are factory installed. Check the unused plug for tightness to prevent leakage.

3 - Install the cap over the clean out opening at the base

of the trap. Secure with clamp. See gure 55.

5 - Figures 50 and 52 show the furnace and evaporator oil

using a separate drain. If necessary the condensate line from the furnace and evaporator coil can drain

together. See gures 51, 53 and 54. Upow furnace (gure 53) - In upow furnace applications the eld

provided vent must be a minimum 1” to a maximum 2” length above the condensate drain outlet connection.

Any length above 2” may result in a ooded heat

exchanger if the combined primary drain line were to become restricted. Horizontal furnace (gure 54)

- In horizontal furnace applications the eld provided

vent must be a minimum 4” to a maximum 5” length above the condensate drain outlet connection.

Any length above 5” may result in a ooded heat

exchanger if the combined primary drain line were to become restricted.

NOTE - In horizontal applications it is recommended to install a secondary drain pan underneath the unit and trap assembly.

NOTE - Appropriately sized tubing and barbed tting may be used for condensate drain. Attach to the drain on the trap using a hose clamp. See gure 48.

(Unit shown in upflow position)

Trap

(same on

right side)

1-1/2 in.

Plug

(same on left side)

NOTE - In upflow applications where side return

sate trap, filter rack must be installed beyond condensate trap or trap must be re-located to

Figure 47

4 - Install drain trap using appropriate PVC ttings, glue

all joints. Glue the provided drain trap as shown in

gure 55. Route the condensate line to an open drain.

Condensate line must maintain a 1/4” downward slope from the furnace to the drain.

IMPORTANT

Do not use copper tubing or existing copper condensate lines for drain line.

Elbow

Barbed Fitting

Tubing

Hose Clamp

Figure 48

6 - If unit will be started immediately upon completion of

installation, prime trap per procedure outlined in Unit Start-Up section. Condensate line must slope downward away from the trap to drain. If drain level is above condensate trap, condensate pump must be used. Condensate drain line should be routed within the con-

ditioned space to avoid freezing of condensate and

blockage of drain line. If this is not possible, a heat cable kit may be used on the condensate trap and line. Heating cable kit is available from Lennox in various lengths; 6 ft. (1.8m) - kit no. 26K68 and 24 ft. (7.3m) kit no. 26K69.

Page 31

Page 32

(Unit shownin upflow position withremote trap)

CONDENSATE TRAP LOCATIONS

minimum 1/4” per ft. toward trap

FieldProvidedVent

Min.1” AboveCondensate

Connection

Drain

Min.

1”

2” Max.

*5’ max.

PVCPipe Only

Trap CanBeInstalleda

Maximum 5’ From Furnac

To Drain

Condensate Trap With Optional Overflow Switch

From Evaporator Coil

HorizontalFurnace4 ” Min.to5” Max.above

condensatedrain connection)

FurnaceCondensate

Connection

Drain

Optional

*Piping from furnace must slope down a

Figure 49

Furnace With Evaporator Coil Using A Separate Drain

(Trap at coil is optional)

Field Provided Vent (1” min. 2” max. above condensate connection)

Condensate

Drain

Connection

Figure 51

Evaporator drain

line required

Figure 50

Page 32

Page 33

Furnace with Evaporator Coil Using a Separate Drain

(Unit shown in horizontal left-hand discharge position)

Furnace with Evaporator Coil Using a Common Drain

(1” min.to2” Max.above

condensatedrain connection)

Condensate

Drain

Connection

Evaporator drain

line required

(Trap at coil is optional)

Furnace with Evaporator Coil Using a Common Drain

Drain

(Trap at coil is optional)

Pan

Piping from furnace and evaporator coil must slope down a minimum 1/4” per ft. toward trap

Evaporator

Coil

Field Provided Vent (4” min. to 5” max. above condensate connection)

4”min

5”max

5’ max.

PVC Pipe Only

Condensate

DrainConnection

Figure 52

IMPORTANT

When combining the furnace and evaporator coil drains together, the A/C condensate drain outlet must be vented to relieve pressure in order for the furnace pressure switch to operate properly.

Figure 53

(Unit shown in horizontal left−hand discharge position)

Evaporator

Coil

Drain

Pan

(Trap at coil is optional)

Piping from furnace and evaporator coil must slope

down a minimum 1/4” per ft. toward trap

Condensate Drain

Connection

Figure 54

5’ max.

PVC Pipe Only

Page 33

4”min

5”max

(4” min.to5” Max.above

condensatedrain

connection)

Page 34

Optional Condensate Drain Connection

TRAP / DRAIN ASSEMBLY USING 1/2” PVC OR 3/4” PVC

Adapter 3/4 inch slip X

3/4 inch mpt (not furnished)

90° Street Elbow 3/4 inch PVC (not furnished)

Condensate Drain

Connection In Unit

90° Street Elbow 3/4 inch PVC ( furnished)

Trap

Optional DrainPipingFrom Trap

Drain Assembly for 1/2 inch Drain Pipe

1/2 inch PVC Pipe

(Not Furnished)

90° Elbow

1/2 inch PVC

(Not Furnished)

Drain

Drain Assembly for 3/4 inch Drain Pipe

1(25 mm) Min. 2 (50 mm) Max. AboveTop Of Condensate Drain Connection In Unit

Elbow 3/4 inch PVC

90°

(Not Furnished)

1/2 inch PVC Pipe

(Not Furnished)

Adapter 3/4 inch slip X

3/4 inch mpt (not furnished)

ent

5 Feet

Maximum

3/4 inch PVC Pipe

(Not Furnished)

Coupling 3/4 inch slip X slip

Drain Trap

Assembly

(Furnished)

Condensate Drain Connection In Unit

(Not Furnished)

90° Elbow

3/4 inch PVC

(Not Furnished)

Drain

DrainTrapAssembly

(Furnished)

(178)

Drain Trap

Clean Out

90° Elbow

3/4 inch PVC

(Not Furnished)

Coupling 3/4 inch slip X slip

Drain

DrainTrap Assembly with 1/2 inch Piping

1 (25 mm) Min. 2 (50 mm) Max. AboveTop Of Condensate Drain Connection In Unit

(Not Furnished)

Vent

1/2 inch

Condensate Drain Connection In Unit

Drain

Figure 55

DrainTr ap Assembly with 3/4 inch Piping

1 (25 mm) Min. 2 (50 mm) Max. AboveTop Of Condensate Drain Connection In Unit

Vent

3/4 inch

Condensate Drain

Connection In Unit

Drain

Page 34

Page 35

Gas Piping

Gas supply piping should not allow more than 0.5”W.C. drop in pressure between gas meter and unit. Supply gas pipe must not be smaller than unit gas connection.

6 - In some localities, codes may require installation of a

manual main shut-off valve and union (furnished by installer) external to the unit. Union must be of the ground joint type.

CAUTION

If a exible gas connector is required or allowed by the

authority that has jurisdiction, black iron pipe shall be installed at the gas valve and extend outside the furnace

cabinet. The exible connector can then be added

between the black iron pipe and the gas supply line.

WARNING

Do not over torque (800 in-lbs) or under torque (350 inlbs) when attaching the gas piping to the gas valve.

1 - Gas piping may be routed into the unit through the

right-hand side only. Supply piping enters into the gas valve from the side of the valve as shown in

gure 57. Connect the gas supply piping into the

gas valve. The maximum torque is 800 in lbs and minimum torque is 350 in lbs when attaching the gas piping to the gas valve.

2 - When connecting gas supply, factors such as length

of run, number of ttings and furnace rating must

be considered to avoid excessive pressure drop.

Table 9 lists recommended pipe sizes for typical

applications.

NOTE - Use two wrenches when connecting gas piping to avoid transferring torque to the manifold.

3 - Gas piping must not run in or through air ducts,

clothes chutes, chimneys or gas vents, dumb waiters or elevator shafts. Center gas line through piping hole. Gas line should not touch side of unit. See

gures 57 and 58.

4 - Piping should be sloped 1/4 inch per 15 feet (6mm

per 5.6m) upward toward the gas meter from the furnace. The piping must be supported at proper intervals, every 8 to 10 feet (2.44 to 3.05m), using suitable hangers or straps. Install a drip leg in vertical pipe runs to serve as a trap for sediment or condensate.

5 - A 1/8” N.P.T. plugged tap or pressure post is located

on the gas valve to facilitate test gauge connection.

See gure 62.

IMPORTANT

Compounds used on threaded joints of gas piping must

be resistant to the actions of liquied petroleum gases.

Leak Check

After gas piping is completed, carefully check all piping

connections (factory- and eld-installed) for gas leaks.

Use a leak detecting solution or other preferred means.

Never use an open ame to test for gas leaks. Check all

connections using a commercially available soap solution

made specically for leak detection.

The furnace must be isolated from the gas supply system by closing its individual manual shut-off valve during any pressure testing of the gas supply system at pressures greater than or equal to 1/2 psig (3.48 kPa, 14 inches w.c.).

Manual Main Shut-Off Valve Will

Not Hold Normal Test Pressure

1/8” N.P.T. Plugged Tap

Isolate Gas Valve

Cap

Figure 56

IMPORTANT

When testing pressure of gas lines, gas valve must be

disconnected and isolated. See gure 56. Gas valves

can be damaged if subjected to pressures greater than 1/2 psig (3.48 kPa).

WARNING

FIRE OR EXPLOSION HAZARD

Failure to follow the safety warnings exactly could result in serious injury, death, or property damage. Never use

an open ame to test for gas leaks. Check all connections

using a commercially available soap solution made

specically for leak detection. Some soaps used for leak

detection are corrosive to certain metals. Carefully rinse piping thoroughly after leak test has been completed.

Page 35

Page 36

Right Side Piping

NOTE - BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET

MANUAL

MAIN SHUT-OFF

VALV E

GROUND

JOINT

UNION

DRIP LEG

Gas Valve

FIELD

PROVIDED

AND INSTALLED

Figure 57

Horizontal Applications

Possible Gas Piping Configurations

Horizontal Application

Right-Side Air Discharge

Gas Valve

MANUAL

MAIN SHUT-OFF

VALV E

GROUND

JOINT

UNION

DRIP LEG

FIELD

PROVIDED

AND INSTALLED

Figure 58

MANUAL

MAIN SHUT-OFF

VALV E

Horizontal Application

Left-Side Air Discharge

GROUND

JOINT

UNION

DRIP LEG

Gas Valve

NOTE - BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET

Page 36

Page 37

TABLE 9

Gas Pipe Capacity - ft3/hr (m3/hr)

Nominal

Iron Pipe

Size Inches

(mm)

1/2

(12.7)

3/4

(19.05)

(25.4)

1-1/4

(31.75)

1-1/2

(38.1)

(50.8)

2-1/2

(63.5)

Internal

Diameter

inches

(mm)

.622

(17.799)

.824

(20.930)

1.049

(26.645)

1.380

(35.052)

1.610

(40.894)

2.067

(52.502)

2.469

(67.713)

(3.048)

172

(4.87)

360

(10.19)

678

(19.19)

1350

(38.22)

2090

(59.18)

4020

(113.83)

6400

(181.22)

(6.096)

118

(3.34)

247

(7.000)

466

(13.19)

957

(27.09)

1430

(40.49)

2760

(78.15)

4400

(124.59)

(9,144)

(2.69)

199

(5.63)

374

(10.59)

768

(22.25)

1150

(32.56)

2220

(62.86)

3530

(99.95)

(12,192)

(2.29)

170

(4.81)

320

(9.06)

657

(18.60)

985

(27.89)

1900

(53.80)

3020

(85.51)

Length of Pipe - feet (m)

(15.240)

(2.03)

151

(4.23)

284

(8.04)

583

(16.50)

873

(24.72)

1680

(47.57)

2680

(75.88)

(18.288)

(1.84)

137

(3.87)

257

(7.27)

528

(14.95)

791

(22.39)

1520

(43.04)

2480

(70.22)

(21.336)

(1.69)

126

(3.56)

237

(6.71)

486

(13.76)

728

(20.61)

1400

(39.64)

2230

(63.14)

(24.384)

(1.58)

117

(3.31)

220

(6.23)

452

(12.79)

677

(19.17)

1300

(36.81)

2080

(58.89)

NOTE - Capacity given in cubic feet (m3 ) of gas per hour and based on 0.60 specic gravity gas.

(27.432)

(1.47)

110

(3.11)

207

(5.86)

424

(12.00)

635

(17.98)

1220

(34.55)

1950

(55.22)

100

(30,480)

(1.42)

104

(2.94)

195

(5.52)

400

(11.33)

600

(17.00)

1160

(32.844)

1840

(52.10)

Removal of the Furnace from Common Vent

In the event that an existing furnace is removed from a venting system commonly run with separate gas appliances, the venting system is likely to be too large to properly vent the remaining attached appliances. Conduct the following test while each appliance is operating and the other appliances (which are not operating) remain connected to the common venting system. If the venting system has been installed improperly, you must correct the system as indicated in the general venting requirements section.

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 for each appliance connected to the venting system being placed into operation, while all other appliances connected to the venting system are not in operation:

1 - Seal any unused openings in the common venting

system.

2 - Inspect the venting system for proper size and

horizontal pitch. Determine that there is no blockage, restriction, leakage, corrosion, or other deciencies

which could cause an unsafe condition.

3 - Close all building doors and windows and all

doors between the space in which the appliances remaining connected to the common venting system are located and other spaces of the building. Turn on clothes dryers and any appliances not connected to the common venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they will operate at maximum speed. Do not

operate a summer exhaust fan. Close replace

dampers.

4 - Follow the lighting instructions. Turn on the appliance

that is being inspected. Adjust the thermostat so that the appliance operates continuously.

5 - After the main burner has operated for 5 minutes,

test for leaks of ue gases at the draft hood relief opening. Use the ame of a match or candle.

6 - After determining that each appliance connected to

the common venting system is venting properly, (step

3) return all doors, widows, exhaust fans, replace

dampers, and any other gas-burning appliances to their previous mode of operation.

7 - If a venting problem is found during any of the

preceding tests, the common venting system must

be modied to correct the problem.

Resize the common venting system to the minimum vent pipe size determined by using the appropriate

tables in Appendix G. (These are in the current standards of the National Fuel Gas Code ANSI Z223.1.

Page 37

Page 38

Electrical

INTERIOR MAKE-UP BOX INSTALLATION

ELECTROSTATIC DISCHARGE (ESD)

Precautions and Procedures

CAUTION

Electrostatic discharge can affect electronic components.

Take precautions to neutralize electrostatic charge by

touching your hand and tools to metal prior to handling the control.

The unit is equipped with a eld make-up box. The makeup box may be moved to the right side of the furnace to facilitate installation. Secure the excess wire to the existing harness to protect it from damage.

Refer to gure 60 for eld wiring, schematic wiring diagram and troubleshooting.

The power supply wiring must meet Class I restrictions. Protected by either a fuse or circuit breaker, select circuit

protection and wire size according to unit nameplate.

NOTE - Unit nameplate states maximum current draw. Maximum Over-Current Protection allowed is 15 AMP.

WARNING

Electric Shock Hazard. Can cause injury or

death. Unit must be properly grounded in accordance with national and local codes.

WARNING

Fire Hazard. Use of aluminum wire with this product may result in a re, causing property damage, severe injury

or death. Use copper wire only with this product.

MAKE-UP

BOX

Right Side

Figure 59

CAUTION

Failure to use properly sized wiring and circuit breaker may result in property damage. Size wiring and circuit breaker(s) per Product Specications bulletin (EHB) and

unit rating plate.

Holes are on both sides of the furnace cabinet to facilitate wiring.

Install a separate (properly sized) disconnect switch near

the furnace so that power can be turned off for servicing. Before connecting the thermostat check to make sure

the wires will be long enough for servicing at a later date. Make sure that thermostat wire is long enough to facilitate future removal of blower for service.

Complete the wiring connections to the equipment. Use

the provided unit wiring diagram and the eld wiring diagram shown in gure 60. Use 18-gauge wire or larger that

is suitable for Class II rating for thermostat connections. Electrically ground the unit according to local codes or,

in the absence of local codes, according to the current National Electric Code (ANSI/NFPA No. 70) for the USA and current Canadian Electric Code part 1 (CSA standard C22.1) for Canada. A green ground wire is provided in the

eld make-up box.

NOTE - The EL195UHNE furnace contains electronic components that are polarity sensitive. Make sure that the furnace is wired correctly and is properly grounded.

Page 38

Page 39

Accessory Terminals

Indoor Blower Speeds

One line voltage “EAC” 1/4” spade terminal is provided on

the furnace integrated control. See gure 61 for integrated control conguration. This terminal is energized when the

indoor blower is operating. Any accessory rated up to one amp can be connected to this terminal with the neutral leg of the circuit being connected to one of the provided neutral terminals. If an accessory rated at greater than one amp is connected to this terminal, it is necessary to use an external relay.

One line voltage “120 HUM” 1/4” spade terminal is pro-

vided on the furnace integrated control. See gure 61 for integrated control conguration. This terminal is energized

in the heating mode when the combustion air inducer is operating. Any humidier rated up to one amp can be connected to this terminal with the neutral leg of the circuit being connected to one of the provided neutral terminals.

If a humidier rated at greater than one amp is connected

to this terminal, it is necessary to use an external relay One 24V ”H” 1/4” spade terminal is provided on the fur-

nace integrated control. See gure 61 for integrated control conguration. The terminal is energized in the heating

mode when the combustion air inducer is operating and

the pressure switch is closed. Any humidier rated up to

0.5 amp can be connected to this terminal with the ground leg of the circuit connected to ground or the ”C” terminal. Install the room thermostat according to the instructions

provided with the thermostat. See gure 60 for thermostat

designations. If the furnace is being matched with a heat pump, refer to the FM21 installation instruction or appropriate dual fuel thermostat instructions.

1 - When the thermostat is set to “FAN ON,” the indoor

blower will run continuously on the fan speed (FAN) when there is no cooling or heating demand.

2 - When the EL195UHNE is running in the heating

mode, the indoor blower will run on the heating speed (HEAT).

3 - When there is a cooling demand, the indoor blower

will run on the cooling speed (COOL).

Generator Use - Voltage Requirements

The following requirements must be kept in mind when specifying a generator for use with this equipment:

• The furnace requires 120 volts + 10% (Range: 108 volts to 132 volts).

• The furnace operates at 60 Hz + 5% (Range: 57

Hz to 63 Hz).

• The furnace integrated control requires both polarity and proper ground. Both polarity and proper grounding should be checked before attempting to operate the furnace on either permanent or temporary power.

• Generator should have a wave form distortion of less than 5% THD (total harmonic distortion).

Page 39

Page 40

TYPICAL EL195UHNE WIRING DIAGRAM

Figure 60

Page 40

Page 41

INTEGRATED CONTROL

(Automatic Hot Surface Ignition System)

RECALL BUTTON

BLOWER OFF DELAY

Electrical

FOR YOUR SAFETY READ BEFORE OPERATING

WARNING

Do not use this furnace if any part has been underwater.

A ood-damaged furnace is extremely dangerous. Attempts to use the furnace can result in re or explosion. Immediately call a qualied service technician to inspect

the furnace and to replace all gas controls, control system parts, and electrical parts that have been wet or to replace the furnace, if deemed necessary.

WARNING

Danger of explosion. Can cause injury or product or property damage. If overheating occurs or if gas supply fails to shut off, shut off the manual gas valve to the appliance before shutting off electrical supply.

CAUTION

Before attempting to perform any service or maintenance, turn the electrical power to unit OFF at disconnect switch.

Figure 61

TABLE 10

1/4” QUICK CONNECT TERMINALS

120HUM Humidier 120VAC

LINE 120VAC

XFMR Transformer 120VAC

CIRC Indoor blower 120VAC

EAC Indoor air quality accessory 120VAC

NEUTRAL Common 120VAC

HUM24 Humidier 24VAC

3/16” QUICK CONNECT TERMINALS

COOL Cooling tap 24VAC

HEAT Heating tap 24VAC

FAN Continuous blower 24 VAC

PARK (no power) Park terminal for speed taps

FLAME / FS Flame Sense

24 COM Common 24VAC

BEFORE LIGHTING the unit, smell all around the furnace

area for gas. Be sure to smell next to the oor because some gas is heavier than air and will settle on the oor.

The gas valve on the EL195UHNE is equipped with a gas control switch (lever). Use only your hand to move switch. Never use tools. If the switch will not move by hand, do not try to repair it. Force or attempted repair may result in

a re or explosion.

Placing the furnace into operation:

EL195UHNE units are equipped with an automatic hot surface ignition system. Do not attempt to manually light burners on this furnace. Each time the thermostat calls for heat, the burners will automatically light. The ignitor does not get hot when there is no call for heat on these units.

Page 41

Page 42

Diagnostic Codes / Status of Furnace

RED LED

Flash Code

TABLE 11

Off No power to control or board fault detected

Heartbeat

Normal Operation - Idle, Continuous Fan, Cool

Continuous Rapid Flash Call For Heat / Burner Operation

1 Reverse Line Voltage Polarity

2 Improper Earth Ground

3 Burner failed to light, or lost ame during heat demand

4 Low Flame Signal - check ame sensor

Watchguard - burner failed to light, exceeded maximum number of retries or recycles.

6 Not Used

Primary or Secondary Limit Open or Watchguard Mode - Limit Switch Open longer than 3 minutes

8 Rollout Switch Open

9 Pressure Switch failed to close or opened during heat demand

10 Watchguard - Pressure Switch opened 5 times during one heat demand

11 Pressure Switch stuck closed prior to activation of combustion air inducer

12 Flame Sensed without gas valve energized

13 Low Line Voltage

Notes

Note - 1 A ”Heartbeat” is indicated by a ”Slow Flash” - 1 sec on 1 sec off, repeating

Note - 2

Error codes are indicated by a “rapid ash” - the LED ashes X times at ½ second on ½

second off, remains off for 3 seconds then repeats.

Last 10 error codes are stored in memory including when power is shut off to the

Note - 3

unit. - To recall, press and release button, most recent will be displayed rst, LED off for 3

sec, then next error code is displayed, etc. To clear error codes, depress and hold button longer than 5 seconds.

Page 42

Page 43

Priming Condensate Trap

GAS VALV E

The condensate trap should be primed with water prior to start-up to ensure proper condensate drainage. Either

pour 10 . oz. (300 ml) of water into the trap, or follow

these steps to prime the trap:

1 - Follow the lighting instructions to place the unit into

operation.

2 - Set the thermostat to initiate a heating demand.

3 - Allow the burners to re for approximately 3 minutes.

4 - Adjust the thermostat to deactivate the heating

demand.

5 - Wait for the combustion air inducer to stop. Set the

thermostat to initiate a heating demand and again

allow the burners to re for approximately 3 minutes.

6 - Adjust the thermostat to deactivate the heating

demand and wait for the combustion air inducer to stop. At this point, the trap should be primed with

sufcient water to ensure proper condensate drain

operation.

WARNING

If you do not follow these instructions exactly, a re or

explosion may result causing property damage, personal injury or death.

Gas Valve Operation (Figure 62)

1 - STOP! Read the safety information at the beginning

of this section. 2 - Set the thermostat to the lowest setting. 3 - Turn off all electrical power to the unit. 4 - This furnace is equipped with an ignition device

which automatically lights the burners. Do not try to light the burners by hand.

5 - Remove the access panel.

6 - Move gas valve switch to OFF. See gure 62. 7 - Wait ve minutes to clear out any gas. If you then

smell gas, STOP! Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions. If you do not smell gas go to next step.

8 - Move gas valve switch to ON. See gure 62.

NEGATIVE AIR

PRESSURE PORT

INLET

SUPPLY

PRESSURE

TAP

GAS VALVE SHOWN IN THE ON POSITION

Figure 62

POSITIVE AIR

PRESSURE PORT

MANIFOLD

PRESSURE TAP

OUTLET

9 - Replace the access panel. 10- Turn on all electrical power to the unit. 11- Set the thermostat to desired setting.

NOTE - When unit is initially started, steps 1 through 11 may need to be repeated to purge air from gas line.

12- If the appliance will not operate, follow the

instructions “Turning Off Gas to Unit” and call your service technician or gas supplier.

Turning Off Gas to Unit

1 - Set the thermostat to the lowest setting. 2 - Turn off all electrical power to the unit if service is to

be performed. 3 - Remove the access panel. 4 - Move gas valve switch to OFF. 5 - Replace the access panel.

Failure To Operate

If the unit fails to operate, check the following:

1 - Is the thermostat calling for heat? 2 - Are access panels securely in place? 3 - Is the main disconnect switch closed? 4 - Is there a blown fuse or tripped breaker?

5 - Is the lter dirty or plugged? Dirty or plugged lters

will cause the limit control to shut the unit off. 6 - Is gas turned on at the meter? 7 - Is the manual main shut-off valve open? 8 - Is the internal manual shut-off valve open? 9 - Is the unit ignition system in lockout? If the unit locks

out again, inspect the unit for blockages.

Heating Sequence Of Operation

1 - When thermostat calls for heat, combustion air

inducer starts.

2 - Combustion air pressure switch proves blower

operation. Switch is factory set and requires no

adjustment. 3 - After a 15-second prepurge, the hot surface ignitor

energizes.

4 - After a 20-second ignitor warm-up period, the gas

valve solenoid opens. A 4-second trial for ignition

period begins.”

5 - Gas is ignited, ame sensor proves the ame, and

the combustion process continues.

6 - If ame is not detected after rst ignition trial, the

ignition control will repeat steps 3 and 4 four

more times before locking out the gas valve

(“WATCHGUARD” ame failure mode). The ignition

control will then automatically repeat steps 1 through

6 after 60 minutes. To interrupt the 60-minute

“WATCHGUARD” period, move thermostat from

“Heat” to “OFF” then back to “Heat”. Heating

sequence then restarts at step 1.

Page 43

Page 44

Gas Pressure Adjustment

Gas Flow (Approximate)

TABLE 12

GAS METER CLOCKING CHART

EL195 Unit

-040 90 180

-060 60 120

-080 45 90

-100 36 72

Natural-1000 btu/cu ft

Seconds For One Revolution

1 cu ft Dial 2 cu ft Dial

Furnace should operate at least 5 minutes before checking gas ow. Determine time in seconds for two revolu- tions of gas through the meter. (Two revolutions assures a more accurate time.) Divide by two and compare to time in table 12 below. If manifold pressure matches table 13

and rate is incorrect, check gas orices for proper size and

restriction. Remove temporary gas meter if installed. NOTE - To obtain accurate reading, shut off all other gas

appliances connected to meter.

Supply Pressure Measurement

A threaded plug on the inlet side of the gas valve provides access to the supply pressure tap. Remove the threaded

plug, install a eld-provided barbed tting and connect a

manometer to measure supply pressure. On multiple unit installations, each unit should be checked

separately, with and without units operating. Supply pressure must fall within range listed in table 13.

Check Manifold Pressure

To correctly measure manifold pressure, follow the steps below

1 - Remove the threaded plug from the outlet side of

the gas valve and install a eld-provided barbed tting. Connect measuring device “+” connection to barbed tting to measure manifold pressure.

2 - Start unit and allow 5 minutes for unit to reach steady

state.

3 - After allowing unit to stabilize for 5 minutes, record

manifold pressure and compare to value given in

Table 18. 4 - Shut unit off and remove manometer as soon as an

accurate reading has been obtained. Take care to

remove barbed tting and replace threaded plug.

5 - Start unit and perform leak check. Seal leaks if found.

IMPORTANT

For safety, connect a shut-off valve between the manometer and the gas tap to permit shut off of gas pressure to the manometer.

TABLE 13

Supply Line and Manifold Pressure (inches w.c.)

Unit Fuel

All Nat 3.5 4.5 - 10.5

Proper Combustion

Furnace should operate minimum 15 minutes with correct

manifold pressure and gas ow rate before checking combustion. Take combustion sample beyond the ue outlet

and compare to the tables below.

EL195

Model

040 6.3 - 7.8

060 6.5 - 8.2

080 7.2 - 8.4

100 7.3 - 8.5

The maximum carbon monoxide reading should not exceed 100ppm.

High Altitude Information

Units are NOT approved for installations over 4500 ft.

Manifold

Pressure

TABLE 14

Line Pressure

CO2% For Nat

Page 44

Page 45

Testing for Proper Venting and Sufcient Combustion Air for Non-Direct Vent Applications

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 for each appliance connected to the venting system being placed into operation, while all other appliances connected to the venting system are not in operation.

After the EL195UHNE gas furnace has been started, the following test should be conducted to ensure proper vent-

ing and sufcient combustion air has been provided to the EL195UHNE as well as to other gas-red appliances

which are separately vented. If a EL195UHNE furnace replaces a Category I furnace

which was commonly vented with another gas appliance,

the size of the existing vent pipe for that gas appliance

must be checked. Without the heat of the original furnace

ue products, the existing vent pipe is probably oversized

for the single water heater or other appliance. The vent should be checked for proper draw with the remaining appliance.

The test should be conducted while all appliances (both in operation and those not in operation) are connected to the venting system being tested. If the venting system has been installed improperly, or if provisions have not been

made for sufcient amounts of combustion air, corrections

must be made as outlined in the previous section.

1 - Seal any unused openings in the venting system.

2 - Visually inspect the venting system for proper size and

horizontal pitch. Determine there is no blockage or restriction, leakage, corrosion, or other deciencies

which could cause an unsafe condition.

3 - To the extent that it is practical, close all building

doors and windows and all doors between the space in which the appliances connected to the venting system are located and other spaces of the building.

4 - Close replace dampers.

5 - Turn on clothes dryers and any appliances not

connected to the venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they will operate at maximum speed. Do not operate a summer exhaust fan.

6 - Follow the lighting instruction to place the appliance

being inspected into operation. Adjust thermostat so appliance will operate continuously.

7 - Use the ame of match or candle to test for spillage

of ue gases at the draft hood relief opening after 5

minutes of main burner operation.

8 - If improper venting is observed during any of the

above tests, the venting system must be corrected or

sufcient combustion/make-up air must be provided. The venting system should be re-sized to approach the minimum size as determined by using the appropriate

tables in appendix G in the current standards of the National Fuel Gas Code ANSI-Z223.1/NPFA 54 in the U.S.A., and the appropriate Natural Gas and Propane

appliances venting sizing tables in the current

standard of the CSA-B149 Natural Gas and Propane Installation Codes in Canada.

9 - After determining that each appliance remaining

connected to the common venting system properly

vents when tested as indicated in step 3, return

doors, windows, exhaust fans, replace dampers

and any other gas-burning appliance to their previous

condition of use.

Other Unit Adjustments

Primary Limit.

The primary limit is located on the heating compartment vestibule panel. This limit is factory set and requires no adjustment.

Rollout Switch

This auto-reset switch is located on the front of the intake air elbow.

Pressure Switch

The pressure switch is located in the heating compartment on the cold end header box. This switch checks for proper combustion air inducer operation before allowing ignition trial. The switch is factory-set and must not be adjusted.

Temperature Rise

After the furnace has been started and supply and return

air temperatures have been allowed to stabilize, check the

temperature rise. If necessary, adjust the blower speed to maintain the temperature rise within the range shown on the unit nameplate. Increase the blower speed to decrease. The temperature. Decrease the blower speed to increase the temperature rise. Failure to adjust the temperature rise may cause erratic limit operation.

Electrical

1 - Check all wiring for loose connections. 2 - Check for the correct voltage at the furnace operating).

Correct voltage is 120VAC + 10% 3 - Check amp-draw on the blower motor with blower

access panel in place.

Unit Nameplate__________Actual__________

Page 45

Page 46

Fan Control

Electronic Ignition

Fan On Delay

The heat fan on time of 30 seconds is not adjustable. The cool fan on delay is 2 seconds and not adjustable.

Fan Off Delay

The heat fan off delay (amount of time that the blower

operates after the heat demand has been satised) may

be adjusted by changing the jumper position across the

ve pins on the integrated control. The unit is shipped with

a factory fan off setting of 90 seconds. The fan off delay affects comfort and is adjustable to satisfy individual applications. Adjust the fan off delay to achieve a supply air temperature between 90° and 110°F at the moment that the blower is de-energized. Longer off delay settings provide lower return air temperatures; shorter settings pro-

vide higher return air temperatures. See gure 63. The

cool fan off delay (amount of time that the blower operates

after the cool demand has been satised) is 45 seconds

and not adjustable.

Blower Speeds

Follow the steps below to change the blower speeds.

1 - Turn off electrical power to furnace. 2 - Remove blower access panel. 3 - Disconnect existing speed tap at integrated control

speed terminal.

NOTE - Termination of any unused motor leads must be insulated.

HEAT FAN‐OFF TIME IN SECONDS

The integrated control has an added feature of an internal Watchguard control. The feature serves as an automatic reset device for integrated control lockout caused by ignition failure. This type of lockout is usually due to low gas line pressure. After one hour of continuous thermostat demand for heat, the Watchguard will break and remake thermostat demand to the furnace and automatically reset the integrated control to begin the ignition sequence.

Service

WARNING

ELECTRICAL SHOCK, FIRE,

OR EXPLOSION HAZARD.

Failure to follow safety warnings exactly could result in dangerous operation, serious injury, death or property damage.

Improper servicing could result in dangerous operation, serious injury, death, or property damage. Before servicing, disconnect all electrical power to furnace.

When servicing controls, label all wires prior to disconnecting. Take care to reconnect wires correctly. Verify proper operation after servicing.

WARNING

The blower access panel must be securely in place when the blower and burners are operating. Gas fumes, which could contain carbon monoxide, can be drawn into living space resulting in personal injury or death.

NO JUMPER

To adjust fan-off timing, reposition jumper across pins to

60 Second

off Time

120

180

achieve desired setting.

90 Second

off Time

120

180

120 Second

off Time

120

180

180 Second

off Time

120

180

Figure 63

4 - Place unused blower speed tap on integrated control

“PARK” terminal or insulate.

5 - Refer to blower speed selection chart on unit wiring

diagram for desired heating or cooling speed.

See Product Specications Bulletin for blower

performance data.

6 - Connect selected speed tap at integrated control

speed terminal. 7 - Resecure blower access panel. 8 - Turn on electrical power to furnace. 9 - Recheck temperature rise.

Annual Furnace Maintenance

At the beginning of each heating season, and to comply with the Lennox Limited Warranty, your system should be checked as follows:

NOTE - Burner inspection and service is not recommended for annual furnace maintenance.

1 - Check wiring for loose connections, voltage at

indoor unit and amperage of indoor motor.

2- Inspect all gas pipe and connections for leaks.

3- Check the cleanliness of lters and change if

necessary (monthly).

4- Check the cleanliness of blower assembly and

clean the housing, blower wheel and blower motor if necessary .

5- Inspect the condensate drain and trap for leaks and

cracks. Check any additional traps such as in the crawl space exhaust. The drain and trap must also be cleaned and the trap must be primed with water.

Page 46

Page 47

6- Remove the rubber hoses from the cold end header

box and inspect for any blockage, clean as needed. If strainers are installed in the hoses remember to remove and clean before reinstalling the hoses.

7- Evaluate the heat exchanger and combustion

chamber integrity by inspecting the heat exchanger per the AHRI heat exchanger inspection procedure. This can be viewed at www.ahrinet.org. See “Induceddraft Furnace Heat Exchanger Inspection Procedure.

8- Ensure sufcient combustion air is available to the

furnace. Fresh air grilles and louvers (on unit and in the room where the furnace is installed) must be

properly sized, open and unobstructed to provide

combustion air.

9- Inspect the furnace intake and exhaust pipes to make

sure they are in place, structurally sound, without holes, blockage or leakage and the exhaust pipe is sloped toward the furnace. Inspect terminations to ensure they are free of obstructions and are structurally sound. If applicable, inspect and clean air intake screen. Inspect the furnace return air duct connection to ensure the duct is sealed to the furnace.

10- Inspect the furnace return air duct connection to

ensure the duct is sealed to the furnace. Check for air leaks on supply and return ducts and seal where necessary.

11- Check the condition of the furnace cabinet insulation

and repair if necessary.

12- Perform a complete combustion analysis during the

furnace inspection to ensure proper combustion and operation. Consult Service Literature for proper combustion values.

13- Verify operation of smoke detectors and CO

detectors and replace batteries as required.

Perform a general system test. Turn on the furnace to check operating functions such as the start-up and shutoff operation.

1 - Check the operation of the ignition system, inspect

and clean ame sensor. Check microamps before

and after. Check controls and safety devices (gas

valve, ame sensor, temperature limits). Consult

Service Manual for proper operating range. Thermal

Limits should be checked by restricting airow and

not disconnecting the indoor blower. For additional details, please see Service and Application Note H049.

2 - Verify that system total static pressure and airow

settings are within specic operating parameters.

3 - Clock gas meter to ensure that the unit is operating

at the specied ring rate. Check the supply

pressure and the manifold pressure. If manifold pressure adjustment is necessary, consult the

Service Literature for unit specic information

on adjusting gas pressure. Not all gas valves are adjustable. Verify correct temperature rise.

Winterizing and Condensate Trap Care

1 - Turn off power to the furnace. 2 - Have a shallow pan ready to empty condensate

water.

3 - Remove the clean out cap from the condensate trap

and empty water. Inspect the trap then reinstall the clean out cap.

Page 47

Page 48

Repair Parts List

The following repair parts are available through Lennox dealers. When ordering parts, include the complete furnace model number listed on the CSA nameplate -- Example: EL195UH040NE36B-01. All service must be

performed by a licensed professional installer (or equivalent), service agency, or gas supplier.

Cabinet Parts

Outer access panel Blower access panel Top Cap

Control Panel Parts

Transformer Integrated control board Door interlock switch

Blower Parts

Blower wheel Motor Motor mounting frame Blower housing cutoff plate

Heating Parts

Flame Sensor Heat exchanger assembly Gas manifold Assembly Combustion air inducer Gas valve Burner assembly Pressure switch Ignitor Primary limit control Rollout switch

Page 48

Page 49

Start-Up & Performance Check List

Furnace: Model Number_______________

Serial Number_________________

GAS SUPPLY

UNIT SET UP

Line Voltage

SUPPLY

AIR

Natural Gas

Piping Connections Tight

Leak Tested

INTAKE / EXHAUST PIPE

Supply Line Pressure “W.C.________

All Joints Primed and Glued

LP Propane Gas

Gas Supply Pressure

DUCT SYSTEM

SUPPLY AIR DUCT

Sealed

Insulated (if necessary)

RETURN DUCT

Sealed

Flter

RETURN AIR

Terminations Installed Properly

Horizontal Pipes Sloped (if applicable)

Condensate Trap Primed / Line Sloped

Pipes Supported

Heat Cable Installed and Operable (if applicable)

Page 49

Filter Installed and Clean

Grilles Unobstructed

VOLTAGE CHECK

Supply Voltage _____

Electrical Connections Tight

Page 50

Contractor's: Name_________________________Telephone_____________Checklist Completed____________________

Job Address_____-________________________________Technician's Name___________________________________

HEATING MODE

GAS MANIFOLD PRESSURE “W.C._____

COMBUSTION SAMPLE CO

2%______

CO PPM_______

INDOOR BLOWER AMPS______

TEMPERATURE RISE

Supply Duct Temperature ________ Return Duct Temperature

_____

Temperature Rise = ________

TOTAL EXTERNAL STATIC

Supply External Static _______

Return External Static + ______

Total External Static = _______

CONDENSATE LINE

Leak Free

VENT PIPE

Leak Free

COOLING MODE

INDOOR BLOWER AMPS______

TEMPERATURE DROP

Return Duct Temperature _________ Supply Duct Temperature

_______

Temperature Drop = _________

DRAIN LINE

Leak Free

THERMOSTAT

Adjusted and Programmed

Explained Operation to Owner

SUPPLY

AIR

Blower Motor Amps

Duct Static

Thermostat

Gas Manifold Pressure

Temperatures

RETURN AIR

Combustion CO

UNIT OPERATION

TOTAL EXTERNAL STATIC (dry coil)

Supply External Static _______

Return External Static + ______

Total External Static = _______

Page 50

Lennox EL195UH040NE36B, EL195UH060NE36B, EL195UH080NE48C, EL195UH100NE60C Installation Instructions And Use

Specifications and Main Features

Frequently Asked Questions

User Manual