Maytag HRX75CQRSCGA, User Manual

25

Good venting is essential for a gas fired water heater to operate
properly as well as to carry away products of combustion and
water vapor.

Smoke / Odor

It is not uncommon to experience a small amount of smoke and
odor during the initial start-up. This is due to burning off of oil
from metal parts, and will disappear in a short while.

Thermal Expansion

Water supply system may, because of such events as high line
pressure, frequent cut-offs, the effects of water hammer among
others, have installed devices such as pressure reducing valves,
check valves, back flow preventers, 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 (thermal expansion) and closed systems do not allow
for the expansion 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
point of water heater’s temperature-pressure relief valve is
reached, the valve will relieve the excess pressure.  

The

temperature-pressure relief valve is not intended for the
constant relief of thermal expansion.

  This is an unacceptable

condition and must be corrected.

It is recommended that any devices installed which could create
a closed system have a by-pass and/or the system have an
expansion tank or device to relieve the pressure built by thermal
expansion in the water system.   Thermal expansion tanks are
available for ordering through the Maytag Customer Service
Center (1-800-788-8899).  Contact the local plumbing inspector,
water supplier and/or 

call Maytag Customer Service at

1-800-788-8899  for assistance in controlling these
situations.

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.

Condensation causes sizzling and popping within the burner
area during heating and cooling periods and should be
considered normal.  See 

Condensation

 section.

Operational Conditions

Smelly Water

I

n each water heater there is installed at least one anode rod

(see parts section) for corrosion protection of the tank. Certain

water conditions will cause a reaction between this rod and the
water. The most common complaint associated with the anode
rod is one of a “rotten egg smell”. This odor is derived
from hydrogen sulfide gas dissolved in the water. The smell is
the result of four factors which must all be present for the odor
to develop:

•

a concentration of sulfate in the supply water.

•

little or no dissolved oxygen in the water.

•

a sulfate reducing bacteria within the water heater. (This
harmless bacteria is non-toxic to humans.)

•

an excess of active hydrogen in the tank. This is caused by
the corrosion protective action of the anode.

Smelly water may be eliminated or reduced in some water heater
models by replacing the anode(s) with one of less active material,
and then chlorinating the water heater tank and all hot water
lines. 

Contact Maytag Customer Service at

1-800-788-8899  for further information concerning an Anode
Replacement Kit and this Chlorination Treatment.

If the smelly water persists after the anode replacement and
chlorination treatment, we can only suggest that chlorination or
aeration of the water supply be considered to eliminate the water
problem.

Do not remove the anode leaving the tank unprotected. By
doing so, all warranty on the water heater tank is voided.

“AIR” In Hot Water Faucets

HYDROGEN GAS: Hydrogen gas can be produced in a hot water
system that has not been used for a long period of time (generally
two weeks or more). Hydrogen gas is extremely flammable and
explosive. To prevent the possibility of injury under these
conditions, we recommend the hot water faucet, located farthest
away, be opened for several minutes before any electrical
appliances which are connected to the hot water system are
used (such as a dishwasher or washing machine). If hydrogen
gas is present, there will probably be an unusual sound similar
to air escaping through the pipe as the hot water faucet is
opened. There must be no smoking or open flame near the
faucet at the time it is open.

High Temperature Shut-Off System

This water heater is equipped with an automatic gas Shut-off
system.  This system works when high water temperatures
are present.   The high temperature Shut-off is built into the
gas control valve. It is non-resettable. If the high temperature
shut-off activates, the gas control valve must be replaced. Turn