Lennox G43UF SERIES Guide

0312009

LENNOX)

20G4

LennoJ(

IndU&lrioa

Inc.

Oall8l,

Teus,

USA

S04.8Q8M

G43UF

SERIES

SuplllSlldes 02/2004

GAS

FURNACE

f'Jl')jj)

Technlcsl

lll.JPu~lioelions

Litho U.S.A.

notstore or use gasoline or other

flammable vapors and liquids in the

vicinity

this

any other

ap-

pliance.

Installation and sen/ice must

performed by a qualified installer

. '

servIce agency

the gas supplier.

WHAT TO DO IF YOU SMELL GAS:

•

not try to light any appliance.

•

not touch any electrical switch; do not

use

any phone in

your

building.

•

leave

the building immediately.

• Immediately call your gas supplier from a

neighbor's phone. Follow the gas supplier's

instructions.

•

you cannot reach

your

gas supplier, call

the fire department.

03/09 504,89BM

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UPPER

ACCESS

PANEL

COMBUSTION

AIR

PROVING

(PRESSURE)

SWITCH

INTEGRATED

CONTROL

BLOWER

ACCESS

PANEL

DURALOKnI

HEAT

EXCHANGER

ASSEMBLY

GAS

VALVE

AND

MANIFOLD

FLUE:

COLLAR

COMBUSTION

AIR

INDUCER

BLOWER

MOTOR

CONTROL

BOX

FIGURE

NOTE -This manu.1

the

property

the homeowner

lind

must

left

with the eqlJlpment user.

This

furnace

equipped

With

safety devices that protect

you

and

your property.

one

these

devices

activated,

furnace

operation will stop. Ifyour

home

left

unattended

for

exlended period

time,

equipment op·

eralion must

checked

periodically.

this

is not

possible,

the

water supply

the

house should

shut

off

and

the

pipes

should

drained.

This

will

prevent

problems

associ-

ated

with a

HEAT

condition (frozen

pipes,

ele.)

AWARNING

Product

contains

fiberglass

wool.

Distllrbing

the

insulation

in this product during

installation. IlHlintenance,

repair will ellpose you

to fiberglass wool.

Breathing

this

may cause

lung

canc~r.

(Fiberglass wool is known to the State of

Cal-

ifornia to cause c;Jncer.)

Fiberglass wool

rnOlY

also cause respiratory, skin.

and

eye

irritation.

reducc

~llPOSUre

this

substance

for further

information,

consult

material

safely

data sheets

available from

~dctress

sllown

helow, or contactyour

supervisor.

Lennox

Indu!itries

Inc.

PO.

Box 799900

Dallas,

75379·9900

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WARNING

NOTICE

Any additions, ch,mges, or

Conyer

sions required in

order for the <tppliancc to satisfactorily meet the ap-

plic<ltion needs must

m<lde

I)y a licensed profes-

sional installer

(or

equivalent) lIsing f3ctory-speci.

fied and approved pat1s.

AWARNING

1 -

Keep

the

furnace

area

clear and free ofcombustible

material. gasoline,

and

other flammable

vapors

and

liquidS,

installed

inSUlated

area,

the

furnace

must

kept

free

of insulating

material.

InSUlating

rna.

tarial may

combustible,

2 - After

any

heavy

snow,

ice or

frozen

fog

event,

the

fur-

nace

vent

pipes

may

become

restricted.

Always

checK

the

vent

system

and

remove

any

snow

ice

that

may

be obstructing

the

plastic intake or

e)(haust

pipes,

3·

NOT

obstruct air flow

unit.

Unit must

receive

unobstructed

now

of combustion

and

ventilating

air.

NOT

block

or obstruct air

openings

the

furnace

air

openings

the

area

which

the

furnace

installed.

Taka

care

maintain established clear-

ances

surrounding

the

furnace.

4 -

NOT

store

chlorine

fluorine products near unit

introduce

these

products

into

the

combustion

air.

These

products

can

cause

furnace corrosion.

S-

NOT

drawreturn aIr from aroom where this fur·

nace, orany other gas appliance

(Ie.,

awater

heat·

er). Is Installed.

When

return

air

drawn

from

room,

negative

pressure

created

the

room.

Ifa

gas

ap-

pliance

operating

room

with

negative

presSUre,

the

flue

products

can

pulled

back

down

the

vent

pipe

and

into

the

room.

This

reverse

flow

the

flue

gas

may result

incomplete combustion

and

the

formation

carbon monoxide

gas.

This

toxic

gas

might

then

distributed throughout

the

house

the

furnace duct system.

WARNING

Yourfurnace is a gas appliance.

critical

that

the

gas

supplied

the

unit

completely

burned

'to

avoid

lhe

pro-

duction of

carbon

monoxide

gas.

Complete

combustion

the

gas

requires.

but

not limited

to.

correct

gas

pressure

and

gas

flow

rate.

adequate combustion,

air.

and

proper

venting.

Exposure to

carbon

monoxide

gas

can

cause

personal

in-

jury

and

even

death

all occupants, including

pets,

Any

item

that

powered

gives

off

heat

from

combustion

process (including

lawn

mowers. automobiles.

and

fire-

places)

has

the

potential

produce

carbon

monOXide

gas.

Because

this,

Lennox recommends the use

a car-

bon monoxide detector in

your

home, even

you

not own gas appliances. Reliable detectors

are

available

reasonable

retail

prices. Contact

your

Lennox

dealer

for

details aboul this investment

your safely.

Your

furnace

designed

meet

standards

sel

national

agencies.

and

to operata safely when properly installed

and

maintained, However,

the

unit's performance

can

greatly

impacted

the

individual installation

and

the

oper·

ating

environment.

your responsibility

ensure

that

this

appliance

maintained. Proper

maintenance

critical

for

your safety

and

the satisfactory operation of

th6

prod-

uct.

Lennox strongly recommends annual inspection

and maIntenance

this appliance. Contact

your

Len-

nox

dealer

for

inspection

licensed

professional

ser-

vice

technician (or equivalent).

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BEFORE

LIGHTING

the untt.

smell

all

around

the

ap-

pliance

area

for

gas.

SUre

smell

the

noor

be-

cause

soma

gas

heavier

than

air

and

will

settle

the

noor.

The

gas

valve

the

G43UF

will

equipped

with

gas

control

sWitch.

Use

only

your

hand

move

the

switch,

Nev-

use

tools.

the

sWitch

will

not

move

hand,

not

try

repair

it.

Call

licensed

professional

service

technician

(or

equivalent).

Force

attempted

repair

may

result

fire

explosion.

Placing the

G43UF

furnace into operation:

G43UF

units

are

equipped

with

ignition

system.

not

allempt

manually

light

burners

this

furnace.

Each

time

the

thermostat

calls

for

heat,

the

burners

will

automati-

cally

light.

The

ignitor

does

not

get

hot

when

there

call

for

heat

units

With

this

ignition

system.

Operating the Gas Valve (Figures 2 and

STOP!

Read

the

safety

information

the

beginning

this

section.

2 -

Set

the

thermostat

the

lowest

setting.

3 -

Turn

off

all

electrical

power

the

unit.

4·

This

furnace

equipped

with

ignition

device

which

automatically

lights

the

burners.

not

try

light

the

burners

hand.

5 -

Remove

the

upper

access

panel.

6·

White

Rodgers

36G

Gas

Valve

Move

gas

valve

switch

OFF.

See

figure

for

the

White

Rodgers

36G

valve.

Honeywell

VR8205

GflS

Valve

Move

switch

gas

valve

OFF.

See

figure 3

for

Honeywell

VR8205

valve.

7 -

Wait

five

minutes

clear

out

any

gas.

you

then

smell

gas,

STOPI

Immediately

call

your

gas

supplier

from

neighbor's

phone.

the

gas

supplier's

instruc-

tions,

you

not

smell

gas

step.

S-

White

Rodgers

36G

Gas

Valve

Move

gas

valve

switch

ON.

See

figure

for

the

While

Rodgers

36G

valve.

Honeywell

VR8205

Gas

Valve

Move

SWitch

gas

valve

ON.

See

figure

for

Honeywell

VR8205

valve.

White Rodgers

36G

Series Gas Valve

MANIFOLD

PRE88U~E

ADJUSTMENT

SCREW

INLET

t==i_~·PRESSURE

POST

OUTLET

PRESSURE

POST

--."....<kI=::::l:~

GAS

VAlVf:

SHOWN

OFF POSITION

FIGURE

Honeywell

VR8205

Series

Gas

Valve

MANIFOLD MANIFOLD

PRESSURE

PRES8UR~

ADJUSTMEN OUTLET

SCREW

GAS VALVE SHOWN IN ON POSITION

FIGURE

9 -

Replace

the

upper

access

panel.

Turn

all

electrical power

the

unit.

-Selthe thermostat

desired setting.

NOTE

When

unit

Initially

started.

steps

through

mayneed

repeated

purge air

from

gas

lina.

12-

the

appliance

will

not

operate,

the

section

"Turning

Off

Gas

the

Unit"

and

call

your

licensed

pro-

fessIonal

service technician

(or

equivalent).

Turning Off

Gas

to the Unit

Set

the

thermostat

the

lowest

setting.

Turn

off

all

electrical

power

the

unit

service

performed.

3·

RemoVe

the

upper access

panel.

4·

White

Rodgers

36G

Gas

Valve

•

Move

gas

valve

switch

OFF.

Honeywell

VR8205

Gas

Valve

Move

5witch

gas

valve

OFF.

Replace

the

upper

aCcess

panel.

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All G43UF fillers are installed

e)(ternal.

to the unit. Filters

should

Inspected monthly. Clean or replace the filters

when necessary to ensure proper furnace operation. Re-

placement filters must be rated for high velocity

alr1low.

Table 1lists recommended filter sizes.

filter

must be in place when Ihe unit is operating.

TABLE 1

Furnace Filter Size

Cabinet Width

SIde

Return

Bottom Return

17-1/2"

X 1

(1)

X 1

(1)

21"

16X25X1

(1)

X 1

(1)

24-1/2"

16X25X

(2)

)(

(1)

A licensed professional service technician (or eqUivalent)

should inspect the complete system each season (heating

and cooling). The following maintenance procedures

should only

conducted by a licensed professional ser-

vice technician (or eqUivalent).

not

attempt

to service

the

unit

any

way.

AWARNING

ELECTRICAL SHOCK, FIRE.

EXPLOSION HAZARD.

Annually (before heating season) inspect furnace venting

system, vent cap, heat exchanger, and burners for corro-

sion, deterioration, or deposits

debris. Remove any ob-

structions.

Inspect the furnace ror obvious signs

deterioration.

Inspect the furnace venting system

make sure it

place, physically sound, and without holes, corrosion. or

blockage.

Vent pipe must

clear and free of obstructions and must

slope upward away from the furnace.

Inspect the furnace return air duct connection to ensure

duct

sealed to the furnace and terminates outside the

space containing the furnace.

Inspect the physical support

the furnace to guarantee

that

is sound without sagging, cracks or gaps around

base and it maintains seal between base and support.

Inspect the condensate drain and trap

for

leaks

and

cracks.

The

dr~in

and

trap must also be cleaned and the trap must

filled with water.

During a seasonal check the service technician will

con~

duct a combustion analysis. The technician will also in-

spect the indoor blower, burner flames, electrical connec-

tions and the venting system.

810wer

Check the blower wheel for debris

and

clean

necessary.

The blower motors are prelubricated for extended bearing

life.

further lubrication is needed.

Failure

safety warnings eXilctly could result

dangerous

operation,

serious

injmy,

death

property

damage.

Improper

servicing

could

result

dangerous

oper~

tion.

serious

injury.

c1eath,

properly

damage.

Before servicing,

disconnect

all electrical

power

fUl'I1ace.

When

servicing

controls,

label

<III

wires

prior

dis-

connecting. Take cart'

reconnect

wires correctly.

Verify

proper

operation

after serVicing.

Venting

System

A WARNING

Asphyxiation

HClzard

The

exhaust

vent

for

this

furnace

must

be Innk·free

and

must

securely

connected

the furnilce flue

collar

<:It

all times.

For

your

sClfety and

ftllfjll

the term::;

the limited

warranty, a licensed

professional

service technician

(or

eqUivalent)

Illust

annually

inspect

this

furnace

Jnd

its

vent

system

AWARNING

The

blower

access

panellTlusl

securely

place

when the

blower

and

burners

are operating.

Gas

fumes.

willet\

could

contam

carbon

monoxide,

can

drawn

11110

living space resulting

personal

inju-

cleCltll

Burner

Flame

A CAUTION

Electrical

1- Check all wiring for loose connections.

2 - Check for the correct voltage at the furnace (furnace

operating).

3 - Check amp-draw

the blower motor.

Motor Nameplate

Actual,

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Call

your

Lennox

selVice

technician

the

unit

will

not

oper-

ate.

Before

calling,

always

check

the

following

sure

salVice

required;

1 -

Check

that

electrical

disconnect

switches

are

ON.

2 -

Check

room

thermostat

for

proper

setting.

3 -

Replace

any

blown

fuses

reset

circuli

breakers.

4 - Gas

valve

should

ON.

5 -

Air

filler

should

not

plugged,

which

will

limit

air

now.

6·

gas

turned

meter?

7 -

manual

main

shut-off

valve

open?

Record

the

model

and

serial

number

the

furnace.

These

numbers

are

the

unit

nameplate,

which

located

the

blower

deck

below

the

combustion

air

inducer.

Serial

Number

Model

Number

!'Cfliil{

'''.1'

«P'

';"~"

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i~"',

you discover any

the

following, shut down your

unit,

and

contact a lennolC dealer foran inspection by

a licensed professional service technician (or equIva-

lent).

• If

you

repeatedly

hear

any

new

unfamiliar

sounds

while

your

unit

operating,

there

may

problem.

For

example,

poorly

performing

burners

can

produce

unfa-

miliar

noises.

• If

you

smell

any

unusual

odors,

your

unit

may

operat-

ing

Improperly.

For

example.

units

can

give

off

unfamil-

iar

odors

components

are

required

operate

ab-

normal

conditionS.

•

Look

(or

Visible

signs

malfunctioning

unit.

Examples

include

unusual

amounts

condensate

windows

in-

side

your

house,

vIsibly

burnt

components

unusual

dirt

rust

accumulations

the

vent

pipe

the

unit.

•

you

experience

headache.

nausea,

fatigue,

dizzi-

ness,

the

cause

could

exposure

carbon

monoxide

gas.

This

often

misdiagnosed

the

flu

because

symptoms

are

similar.

you

suffer

from

flU-like

symp-

toms

that

are

exaggerated

home,

but

seem

sub-

side

while

you

are

away

from

the

house,

exposure

carbon

monoxide

could

the

cause.

Your

vigilance

may

payoff

early

detection

problem

before

either

personal

injUry

property

damage

occurs,

not

hesitate

conlact

qualified

service

technician

investment

your

well

being.

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';~~:

...

1Il::::

:.:"

You

should

expect

selVice

technician

check

the

follow-

ing

items

during

annual

inspection.

Power

the

unit

must

shut

off

for

the

service

technician's

safety.

Fresh air

grilles

and louvers

(on

the

unit

and

the

room

Where

the

furnace

installed) -

Must

open

and

unob-

structed

provide

combustion

air.

Burners-

Must

inspected

for

rust,

dirt,

signs

water.

Vent pipe -

Must

inspected

for

signs

water,

damaged

sagging

pipe,

disconnected

joints.

Unit appearance -

Must

inspected

for

rust,

dirt,

signs

waler,

burnt

damaged

wires.

components.

Blower access door-

Must

properly

place

and

pro-

vide

seal

between

the

return

air

and

the

room

where

the

furnace

installed.

Return air duct -Musl

properly

attached

and

proVide

air

seal

the

unit.

operating performance. Unit

must

observed

during

operation

tnonilor

proper

performance

the

unit

and

the

vent

system.

Combustion

gase8

Flue

products

must

analyzed

and

compared

the

unit

speclflcations.

Problems

detected

during

Ihe

inspection

may

make

nec-

essary

temporarily

shut

down

the

furnace

unlil

the

Items

can

repaired

replaced.

Pay

attention

your furnace.

Situations

can

arise

be-

tween

annual

fumace

inspections

that

may

result

unsafe

operation.

For

instance.

items

innocently

stored

ne>rt

the

fumace

may

obstruct

the

combustion

air

supply.

This

could

cause

incomplete

combustion

and

the

production

car-

bon

monOXide

gas.

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The

following

repair

paris

are

available

through

Lennox

dealers.

When

ordering

parts,

include

the

complete

furnace

model

number

listed

the

CSA

International

nameplate

Example:

G43UF-24B-045-2.

All service must

done byalicensed

professional Installer (or equivalent), 8 service agency, or the gas supplier.

Cabinet Parts

Upper

access

panel

Blower

access

panel

Top

Cap

Control Panel Parts

Transformer

Integrated

control

Door

interlock

switch

Blower Parts

Blower

wheel

Motor

mounting

frame

Motor

capacitor

Blower

housing

cutoff

plate

Heating Parts

Flame

Sensor

Heat

exchanger

assembly

Gas

manifold

Combustion

air

inducer

Gas

valve

Main

burner

cluster

Main

burner

orifices

Pressure

switch

Ignitor

Primary

limil

control

Secondary

limit

Flame

rollout

switches

Combustion

air

inducer auxiliary

limit

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LENNOX)

13ACX

Corp,

0612·L2

Revised

AuguBl11.

2010

Service

Literature

411

l.OUVERED

NON·LOUVERED

A WARNING

ImprOPt'r

im;lallalioll, adjustment,

alt~ratl()n.

i;f:;rvil.:\:

mamtenanr.p.

can

Cllll~;e

pcr:;oll.:llilljury. loss

olliff!,

dam3gA tn properly

In~~IClII;1tion

;.lClI.1

~;(~rVICl)

IlIllst

perform8d

;'1

liC;;;r1~;'.ic.1

prnff:i;$iIHltll

in~;I'.lllcr

(or

equivalent) or

;'\

~8rVIr:e

;.I!Jt.~!lC.:Y.

A IMPORTANT

ThiS IlIlil !nu'.;l

IllEllclled

wiltl

311

incloClI r:od

specified

LAnnnx

EIIU1f1l,l,:,nnn

H~lndl)l)ok.

Coils

oviou31y

c:llarged willi

HCFC

rt'1I,1~.;1

flushed.

TABLE OF CONTENTS

Model

Number

Identification "

Typical

Serial

Number Idenlification

Specifications ,

Electrical

Data

Unit

Dimensions , , . ,

Typical

Unit

Parts

Arrangement

Operating Gauge Set

and

Service

Valves

Unit

Placement, . ' , . '

Removing

and

Installing Louvers ,

Newor Replacement Line

Set

,.,.,

,, , 2

, ,., .. ... 2

Brazing Connections ,. . .. . .. ..

Flushing Line

Set

and

Indoor

Coil

...

Installing Indoor Metering Device. . . . ... ..

Leak

Test

Line

Set

and

Indoor Coil, ,

, ..

Evacuating Line Sel

and

IMoor

Coil

,.,..

Electrical Connections " ,

"",

Servicing Unit

Void

of Charge ,

Unit

Start-Up, ,

,.. , ., , ,,. , ,

System

Refrigerant , ., ,

, '

,. , ,.. .

System

Operation

,.",

,."

, " 28

Maintenance , . , ,

,, . ,

,, ' ,

start·Up

and

Perlormance Checklist

,.,

...

Sequence ofOperations

....

,. ,

....

,. , , ,

13ACX

Air Conditioners. which will

also

referred

this

instruction 8S

the

outdoor

unit,

uses

HFC-4

refrigerant. This outdoor unit must

installed with a

matching indoor unit

and

line

set

outlined

the

Lennox

13ACX

Engineering

Handbook.

This

outdoor unitls designed for use in

systems

that use

one

the

following refrigerant metering

devices:

Thermal

expansion valve

(TXV)

•

Fixed

orifice

A IMPORTANT

Thf~

Clc"ln Air Act or 1

mJO

bans

!lle

mlAnliol);'ll velllirJ(j {If

rdllt~",ranl

(CF(>.;. HCFCs and HI Cs)

<IS

of July

1992.

Approved rnelho<b

r)r

r~(;(Iv(';ry.

rt.'cycling or

rc:c

ail11l1lg

mw;1

he followed.

1-11l8S

ElIl(J/Qr

incarceration

may

t>~

II~vwl.1

for

nOllcompll.:mce.

,.....

,. ,.. , .

,...

, ' . .

,....

Page

6VLB

'ON

UFlftJllllb

"("t,*~-a,

;"··,*Is:el$t~.

:=]

1 X-024 -

t-13

Nominal SEER

T Minar

Revilion

NumberD

Voltage

Unit

Type 230;; 208/230V·1phase-60h:z

;;

Air Conditioner Cooling Cepaclty -

Tons

018'"

1.5

Refrlgeranl-----------l

024;;

030'"

2.5

X'" R-410A

036'"

042;;3.5

048

"'4

060"

location

Code

19'"

Saltillo,

Mellic_----'

=Marshalltown.

'(or

Dlgl'

"",que

"urn"'"

Year CodI Month

Code

06;;

2008 A'" January

09'"

2009 B'" February

10'"

2010

....J C"'March

Model

Number

Page 2

6PLB

'ON

""",,*~_1'

iu,I'mles):.

Un~

OuldoorFan

Model

Nl,I\l1ber

13ACX-060·230-12

~~1:

!t~

:';'

SOl,lnd

RIIUnQ

Number

(dB~

Number

Blada;

Diameler

-Inches.

Tesllild

according

AHRI

Stundard

270·2006

test

GOn(lilions.

Refrigerant

chargo

$ulficianl

for

feel

length

refrillllranl

~nlIs.

Page

13ACXSERIES

6VL8

'oN

.[tI'ItI~1a,

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