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

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

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)

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

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

• 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

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

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

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

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

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

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

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.

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

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

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

+ 35 hidden pages

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

Specifications and Main Features

Frequently Asked Questions

User Manual