Kenmore 33124 Owners Manual - Page 18

Troubleshooting

Guide

Start

Up Conditions

THERMAL

EXPANSION

Water

supply

systems

may,

because

of

such

events

as

high

line

pressure,

f[equent

cut-offs,

the

effects

of

water

hammer

among

others,

have

installed

devices

such

as

pressure

reducing

valves,

check

valves,

back

flowpreventers,

etc._to

control

these

types

of

problems.

When

these

devices

are

not equipped

with

an internal

by-pass,

and

no

other

measures

are

taken,

the

devices

cause

the

water

system

to be closed.

As water

is heated,

it expands

(ther-

mal

expansion)

and

closed

systems

do

not

allow

for

the

expan-

sion

of

heated

water.

The water within the water heater tank expands as it is heated and

increases the pressure

of

the water system. If the relieving _oint

of

the water heater s temperature-pressure

relief valve is reached, the

valve will relieve the excesspressure.

The

tempera_premure

relief valve is not intendedfor

the constant relief of thermal

expansion.

This is an unacceptable

condition

and

must be cor-

rected.

It is recommended

that any

devices

installed

which

could create

a

dosed

system have

a

by-pass and/or

the system have an expan-

sion

tank

to relieve the

pressure

built

by thermal

expansion.

Thermal

expansion

tanks

are available

from

Sears stores

and

through

the Sears Service Centers.

Contact

the local plumbing

inspector,

water

supplier

and/or

the

Sears Service Center

for

assistance

in controlling these situations.

Thermal

Expansion

Tank

Specifications

Model

Tank Capacity

Dimensions

in Inches

Pipe

Fitting

Number

In Gallons

Diameter

Length

On

Tank

153.331020

2

8 inches

12_ inches

_" Male

153.331050

5

11 inches

14_ inches

_" Male

HOT

COLD

WATER HEATER

COLD WATER

;;_

INLET FITTING

O)

PRESSURE

REDUCING

VALVE

BY.PASS

0)

1

EXPANSION

TANK

O)

PRESSUREGAUGE

WATER

SHUTOFF

RECOMMENDED

INSTALLATION

(VERTICAL MOUNTING)

WATER

HEA1TcR

COLD WATER

INLET FITTING

FLOOR, CIEIUNG

joist,

ETC.

HOT

COLD

STRAPPING

(I)

EXPAN_ON

0)

PRESSURE

REDUCING

INLET COLD

VALVE

WITH

WATER

BYPASS

SHUTOFF

Expansion

Tank Sizing

Chart

Water Heater Capacity

(Gallons)

Inle_

Water

Pressure

40psi

50psi

60psi

70psi

80psi

Expansion

30

40

50

66

82

Tank

2

2

2

5

5

Capacity

2

2

2

5

5

Needed

2

2

5

5

5

2

2

5

5

5

2

5

5

5

5

*Highest

recorded inlet water pressure

in

a

24 hour

period

or

regulated water pressure.

NOTE:

Expansion

tanks

are

pre-charged

with

a 40

psi

air

charge.

If the inlet

water

pressure

is higher

than

40

psi, the

expansion

tanks

air

pressure

must

be

adjusted

to match

that

pressure, but must not be higher than 80 psi.

(2)

PRESSURE

GAUGE

ALTERNATE RECOMMENDED

INSTALLATION

(HORIZONTAL MOUNTING)

STRANGE

SOUNDS

Possible noises due to expansion

and

contraction

of some metal

parts during periods

of

heat-up

and

cool-down do not represent

harmful

or

dangerous

conditions.

18

Kenmore 33124 Owners Manual - Page 18

Troubleshooting, Guide

Page 18 highlights