Ao-smith 315795-000 MH User Manual download pdf (Page 25)

FIGURE 40.

SERVICE

If a condition persists or you are uncertain about the operation of

the water heater contact a service agency.

Use this guide to check a “Leaking” water heater. Many suspected

“Leakers” are not leaking tanks. Often the source of the water can

be found and corrected.

If you are not thoroughly familiar with gas codes, your water heater,

and safety practices, contact your gas supplier or qualiﬁ ed installer

to check the water heater.

LEAKAGE CHECKPOINTS

Read this manual ﬁ rst. Then before checking the water heater make

sure the gas supply has been turned “OFF”, and never turn the gas

“ON” before the tank is completely full of water.

A. *Condensation may be seen on pipes in humid weather or pipe

connections may be leaking.

B. *The anode rod ﬁ tting may be leaking.

C. Small amounts of water from temperature-pressure relief valve

may be due to thermal expansion or high water pressure in your

area.

D. *The temperature-pressure relief valve may be leaking at the

tank ﬁ tting.

E. Water from a drain valve may be due to the valve being slightly

opened.

F. *The drain valve may be leaking at the tank ﬁ tting.

G. Combustion products contain water vapor which can condense

on the cooler surfaces of the tank. Droplets form and drip onto

the burner or run on the ﬂ oor. This is common at the time of

start-up after installation and when incoming water is cold.

H. Water in the water heater bottom or on the ﬂ oor may be from

condensation, loose connections, or the relief valve. DO NOT

replace the water heater until a full inspection of all possible water

sources is made and necessary corrective steps taken.

Leakage from other appliances, water lines, or ground seepage

should also be checked.

* To check where threaded portion enters tank, insert cotton

swab between jacket opening and ﬁ tting. If cotton is wet, follow

“Draining” instructions in the “Periodic Maintenance” section and

then remove ﬁ tting. Put pipe dope or teﬂ on tape on the threads

and replace. Then follow “Filling the Water Heater” instructions

in the “Installing the New Water Heater” section.

6. CLOSE the drain valve.

7. Follow instructions in the “Filling The Water Heater” section.

8. Follow the lighting instructions on the label or see page 20 under

“Lighting Instructions” to restart the water heater.

DRAIN VALVE WASHER REPLACEMENT

(See Figure 40)

1. Turn “OFF” gas supply to water heater.

2. Follow “Draining” instructions.

3. Turning counterclockwise (

), remove the hex cap below the

screw handle.

4. Remove the washer and put the new one in place.

5. Screw the handle and cap assembly back into the drain valve

and retighten using a wrench. DO NOT OVER TIGHTEN.

6. Follow instructions in the “Filling The Water Heater” section.

7. Check for leaks.

8. Follow the lighting instructions on the “Lighting & Operating Label”

section to restart the water heater.

FIGURE 41.

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 55 56

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Ao-smith 315795-000 MH User Manual Page 25

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