Kenmore 33125 Owners Manual - Page 11

• Doobtainewwarning

and

instruction

labels

fromSears

for

placement

ontheblanket

directly

over

theexisting

labels.

• Doinspect

theinsulation

blanket

frequently

tomakecertain

itdoesnotsag,

thereby

obstructing

combustion

airflow.

Combustion

Air

and

Ventilation

for

Appliances

Located

in Unconfined

Spaces

UNCONFINED

SPACE

is space

whose

volume

is not

less than

50

cubic

feet

per

1,000

Btu

per

hour

(4.8

m 3 per

kW)

of

the

aggregate

input

rating

of all appliances

installed

in that

space.

Rooms

communicating

directly

with

the

space

in

which

the

appliances

are

installed,

through

openings

not

furnished

with

doors,

are

considered

a part

of the

unconfined

space.

In unconfined

spaces

in buildings,

infiltration

may

be

adequate

to

provide

air

for

combustion,

ventilation

and

dilution

of

flue

gases.

However,

in buildings

of tight

construction

(for

example,

weather

stripping,

heavily

insulated,

caulked,

vapor

barrier,

etc.),

additional

air

may

need

to be provided

using

the

methods

described

in

Combustion

Air

and

Ventilation

for

Appliances

Located

in Confined

Spaces.

Combustion

Air

and

Ventilation

for

Appliances

Located

in Confined

Spaces

CONFINED

SPACE

is

a

space

whose

volume

is

less

than

50

cubic

feet

per

1,000

Btu

per

hour

(4.8

m 3 per

kW)

of the

aggregate

input

rating

of all appliances

installed

in that

space.

A.

ALL

AIR

FROM

INSIDE

BUILDINGS:

(See

Figure

9 on page

10 and

Figure

10 below)

The

confined

space

shall

be

provided

with

two

permanent

openings

communicating

directly

with

an

additional

room(s)

of

sufficient

volume

so

that

the

combined

volume

of

all

spaces

meets

the

criteria

for an

unconfined

space.

The

total

input

of all

gas

utilization

equipment

installed

in the

combined

space

shall

be considered

in making

this

determination.

Each

opening

shall

have

a minimum

free area

of one

square

inch

per

1,O00 Btu per

hour

(22

cm2/kW)

of

the

total

input

rating

of all

gas

utilization

equipment

in the

confined

space,

but

not

less

than

100

square

inches

(645 cm2).

One

opening

shall commence

within

12 inches

(30

cm)

of the

top

and

one

commencing

within

12 inches

(30

cm)

of the

bottom

of the

enclosures.

NT

___OP

ENINGS

FIGURE 10,

B. ALL AIR FROM OUTDOORS: (See Figures 9, 11,12,13 and 13A)

The

confined

space

shall

be

provided

with

two

permanent

openings,

one

commencing

within

12 inches

(30 cm)

of the

top

and

one

commencing

within

12 inches

(30 cm)

from

the

bottom

of the

enclosure.

The

openings

shall

communicate

directly,

or

by ducts,

with

the

outdoors

or spaces

(crawl

or attic)

that

freely

communicate

with

the

outdoors.

CHIMNEY

OR

GAS VENT

VENTILATION

LOUVERS

OUTLET

MR

'WATERHEATER

FURNACE

INLETAIR

DUCT

ALT.

INLET

AiR

VENTILATION

LOUVERS

FIGURE

II.

When

directly

communicating

with the outdoors,

each opening

shall

have

a minimum

free area

of 1 square

inch

per 4,0go

Btu

per hour

(5.5 cm2/kW)

of total

input

rating

of all equipment

in

the

enclosure.

See

Figure

11.

When

communicating

with

the

outdoors

through

vertical

ducts,

each

opening

shall

have

a

minimum

free

area

of

1

square

inch

per

4,000

BTU

per

hour

(5.5

cm2/kW)

of

total

input

rating

of

all

equipment

in the

enclosure.

See

Figure

12.

CHIMNEY

OR

GAS VENT

VENTiLATiON

LOUVERS

_.,_'(EAOH

END

OF

ATT'C)

AIR

OUTLET

_

WATER

HEATER

INLET

AIR

DUCT

IIl ll LfJL ilq--- 'Nos,'cR,oo..

ABOVE

FLOOR)

FIGURE 12.

When

communicating

with

the

outdoors

through

horizontal

ducts,

each

opening

shall

have

a

minimum

free

area

of

1

square

inch

per

2,000

BTU

per

hour

(11

cm2/kW)

of

total

input

rating

of

all

equipment

in the

enclosure.

See

Figure

13.

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

short

side

dimension

of

rectangular

air

ducts

shall

not

be

less

than

3

inches

(76.2

ram).

See

Figure

13.

11

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