Series Ten
GAS WATER HEATER
USER’S GUIDE
FOR POTABLE WATER HEATING ONLY
NOT SUITABLE FOR SPACE HEATING
NOT FOR USE IN
MANUFACTURED (MOBILE) HOMES
Model Number
HRX75XQRS
HRX75CQRS
For Your Safety
AN ODORANT IS ADDED TO THE GAS USED
BY THIS WATER HEATER.
PRINTED IN THE U.S.A 1004
1
www.maytagwaterheaters.com
PART NO. 196300-001
66001855
SAFE INST
ALLA
TION
INSTALLA
ALLATION
TION,, USE AND SERVICE
Your safety and the safety of others is extremely important in the installation, use and servicing of this water heater.
Many safety-related messages and instructions have been provided in this manual and on your own water heater to warn you and
others of a potential injury hazard. Read and obey all safety messages and instructions throughout this manual. It is very
important that the meaning of each safety message is understood by you and others who install, use or service this water heater.
This is the safety alert symbol. It is used to alert you
to potential personal injury hazards. Obey all safety
messages that follow this symbol to avoid possible
injury or death.
DANGER
DANGER indicates an imminently
hazardous situation which, if not avoided,
could result in death or injury.
WARNING
WARNING indicates a potentially hazardous
situation which, if not avoided, could result
in death or injury.
CAUTION
CAUTION indicates a potentially hazardous
situation which, if not avoided, may result
in minor or moderate injury.
CAUTION
CAUTION used without the safety alert
symbol indicates a potentially hazardous
situation which, if not avoided, could result
in property damage.
All safety messages will generally tell you about the type of hazard, what can happen if you do not follow the safety message and
how to avoid the risk of injury.
IMPORTANT DEFINITIONS
• Maytag Customer Service Center: The Maytag Customer Service Center has the equivalent to a licensed tradesman in the
fields of plumbing, air supply, venting and gas supply, including a thorough understanding of the requirements of the National
Fuel Gas Code as it relates to the installation of gas fired water heaters. The Service Center also has a thorough understanding
of this instruction manual, and is able to perform repairs strictly in accordance with the service guidelines provided by the
manufacturer.
• Gas Supplier: The natural gas or propane utility or service which supplies gas for utilization by the gas burning appliances within
this application. The gas supplier typically has responsibility for the inspection and code approval of gas piping up to and
including the natural gas meter or propane storage tank of a building. Many gas suppliers also offer service and inspection of
appliances within the building.
2
SAFETY PRECAUTIONS
3
TABLE OF CONTENTS
SAFE INSTALLATION, USE AND SERVICE ................................................................................................. 2
SAFETY PRECAUTIONS .............................................................................................................................. 3
TABLE OF CONTENTS ................................................................................................................................ 4
CUSTOMER RESPONSIBILITIES ................................................................................................................ 5
PRODUCT SPECIFICATIONS ...................................................................................................................... 5
ACCESSORIES AND TOOLS NEEDED ...................................................................................................... 6
Accessories ............................................................................................................................................................ 6
Tools ....................................................................................................................................................................... 6
PREPARATIONS FOR INSTALLATION ......................................................................................................... 7
Removing the Old Water Heater .............................................................................................................................. 7
TYPICAL INSTALLATION ............................................................................................................................ 8,9
Get to Know Your Water Heater .............................................................................................................................. 8
Mixing Valve Usage ................................................................................................................................................. 9
LOCATING AND INSTALLING THE NEW HEATER ................................................................................ 10-18
Facts to Consider About the Location ............................................................................................................... 10,11
Insulation Blankets ............................................................................................................................................ 11,12
Combustion Air and Ventilation for Appliances
Located in Unconfined Spaces .............................................................................................................................. 12
Combustion Air and Ventilation for Appliances
Located in Confined Spaces ............................................................................................................................. 12,13
Water Piping .................................................................................................................................................... 13,14
Temperature Pressure Relief Valve.................................................................................................................... 14,15
Filling the Water Heater .................................................................................................................................... 15,16
Venting ............................................................................................................................................................. 16,17
Gas Piping ....................................................................................................................................................... 17,18
Sediment Traps ..................................................................................................................................................... 18
OPERATING INSTRUCTIONS ................................................................................................................ 19-21
Lighting & Operating Label ............................................................................................................................... 19,20
Temperature Regulation ......................................................................................................................................... 21
SERVICE AND MAINTENANCE .............................................................................................................. 22-24
Tank (Sediment) Cleaning ...................................................................................................................................... 22
Vent System Inspection ........................................................................................................................................ 22
Burner Inspection .................................................................................................................................................. 22
Burner Cleaning ................................................................................................................................................ 22,23
Housekeeping ....................................................................................................................................................... 23
Anode Rod Inspection ........................................................................................................................................... 23
Temperature-Pressure Relief Valve Operation ........................................................................................................ 23
Draining ............................................................................................................................................................ 23,24
Drain Valve Washer Replacement .......................................................................................................................... 24
Service .................................................................................................................................................................. 24
TROUBLESHOOTING ............................................................................................................................ 24-26
Start Up Conditions .......................................................................................................................................... 24,25
Draft Hood Operation .................................................................................................................................... 24
Condensation........................................................................................................................................... 24,25
Smoke / Odor ............................................................................................................................................... 25
Thermal Expansion ....................................................................................................................................... 25
Strange Sounds ............................................................................................................................................ 25
Operational Conditions ..................................................................................................................................... 25,26
Smelly Water ............................................................................................................................................... 25
“AIR” In Hot Water Faucets .......................................................................................................................... 25
High Temperature Shut Off System .......................................................................................................... 25,26
Leakage Checkpoints ............................................................................................................................................ 26
TROUBLESHOOTING GUIDE .................................................................................................................... 27
REPAIR PARTS LIST .................................................................................................................................. 28
NOTES .................................................................................................................................................................. 29-31
WARRANTY ................................................................................................................................................ 32
4
CUSTOMER RESPONSIBILITIES
• The installation must conform with these instructions and
the local code authority having jurisdiction. In the absence of
local codes, installations shall comply with the National Fuel
Gas Code ANSI Z223.1/NFPA 54. This publication is available
from CSA International, 8501 East Pleasant Valley Rd,
Cleveland Ohio 44131, or The National Fire Protection
Association, 1 Batterymarch Park, Quincy, MA 02269.
Thank You for purchasing a Maytag water heater. Properly
installed and maintained, it should give you years of trouble
free service. It is strongly suggested that this new water heater
be professionally installed, contact Maytag Customer Service
at 1-800-788-8899 for recommended installers.
Abbreviations Found In This Instruction Manual:
•
•
•
•
•
•
•
•
CSA - Canadian Standards Association
UL - Underwriters Laboratories, Inc.
ANSI - American National Standards Institute
NFPA - National Fire Protection Association
ASME - American Society of Mechanical Engineers
GAMA - Gas Appliance Manufacturers Association
EPACT - Energy Policy Act
CAN - Canada
• If after reading this manual you have any questions or do not
understand any portion of the instructions, call Maytag
Customer Service at 1-800-788-8899 for an authorized
servicer.
• Carefully plan the place where you are going to put the water
heater. Correct combustion, vent action, and vent pipe
installation are very important in preventing death from
possible carbon monoxide poisoning and fires, see
Figures 9 through 14.
This gas-fired water heater is design certified by Underwriters
Laboratories, Inc. under American National Standard/CSA
Standard for Gas Water Heaters ANSI Z21.10.3 • CSA 4.3 (current
edition).
Examine the location to ensure the water heater complies
with the Locating and Installing the New Water Heater section
in this manual.
• Read the “Safety Precautions” section, page 3 of this manual
first and then the entire manual carefully. If you don’t follow
the safety rules, the water heater will not operate properly. It
could cause DEATH, SERIOUS BODILY INJURY AND/OR
PROPERTY DAMAGE.
• For California installation this water heater must be braced,
anchored, or strapped to avoid falling or moving during an
earthquake. See instructions for correct installation
procedures. Instructions may be obtained from your local
dealer, wholesaler, public utilities or California Office of the
State Architect, 400 P Street, Sacramento, CA 95814.
This manual contains instructions for the installation,
operation, and maintenance of the gas-fired water heater. It
also contains warnings through out the manual that you must
read and be aware of. All warnings and all instructions are
essential to the proper operation of the water heater and
your safety. Since we cannot put everything on the first few
pages, READ THE ENTIRE MANUAL BEFORE ATTEMPTING
TO INSTALL OR OPERATE THE WATER HEATER.
• Massachusetts Code requires this water heater to be
installed in accordance with Massachusetts 248-CMR 2.00:
State Plumbing Code and 248-CMR 5.00.
• Complies with SCAQMD rule #1146.2 and districts having
equivalent NOx requirements.
PRODUCT SPECIFICA
TIONS
SPECIFICATIONS
MODEL NUMBER
HRX75XQRS
HRX75CQRS
TANK
CAPACITY
IN GALS
(LTRS)
75 (284)
75 (284)
TYPE
OF
GAS
NATURAL
PROPANE
BTU
RATE
75,100
75,100
RECOVERY
RATE GALS.
PER HOUR
@ 90°F RISE
81.0
81.0
MINIMUM
VENT PIPE
INCHES
(mm)
4” (102)
4” (102)
DIAMETER
INCHES
(mm)
26 3/8” (670)
26 3/8” (670)
DIMENSIONS
IN INCHES (mm)
HEIGHT TOP OF
DRAFT HOOD
61 1/8” (1,553)
61 1/8” (1,553)
* Adding suffix “D” denotes high altitude (example: HRX75XQRSD). High altitude models have derated BTU and Recovery Rates.
5
ACCESSORIES AND TOOLS NEEDED
Accessories
To simplify the installation Maytag has available the installation parts shown below. You may or may not need all of these accessories
depending on your type of installation. Call Maytag Customer Service at 1-800-788-8899 for an authorized installer.
DRAIN PANS AVAILABLE IN 22” (559 mm) DIAMETER (PART NO.
66001011) FOR WATER HEATERS HAVING A DIAMETER 20” (508
mm) OR LESS, 24” (610mm) DIAMETER (PART NO. 66001105) FOR
WATER HEATERS HAVING A DIAMETER 22” (559 mm) OR LESS AND
28” (711 mm) DIAMETER (PART NO. 66001012) FOR WATER HEATERS
HAVING A DIAMETER 26” (660 mm) OR LESS.
EXPANSION TANKS FOR THERMAL EXPANSION CONDITIONS
AVAILABLE IN 2 GALLON (7.6 LITERS), Part No. 66001013 AND
5 GALLON (18.9 LITERS), Part No. 66001014 CAPACITY.
Tools
Additional Tools Needed
When Sweat Soldering
You may or may not need all these tools, depending on your
type of installation. These tools can be purchased at your local
hardware store.
•
•
•
•
•
•
•
•
•
•
•
•
•
Pipe Wrenches (2) 14” (356 mm)
Screwdriver
Tin Snips
6’ (1.82 m) Tape or Folding Ruler
Garden Hose
Drill
Pipe Dope or Teflon Tape
Tubing Cutters or Hacksaw
Propane Tank
Soft Solder
Solder Flux
Emery Cloth
Wire Brushes
DRILL
SLOT-HEAD SCREWDRIVER
TUBING CUTTER
PROPANE
TORCH
TIN SNIPS
PHILLIPS SCREWDRIVER
ROLL OF TEFLON
TAPE (USE ONLY ON
WATER HEATER
CONNECTIONS)
PIPE DOPE
(SQUEEZE TUBE)
USE FOR WATER AND GAS
CONNECTIONS
HACKSAW
ROLL OF
EMERY CLOTH
3/4” (19 mm) WIRE BRUSH
GARDEN HOSE
6 FOOT TAPE
1/2” (13 mm) WIRE BRUSH
PIPE WRENCH
6
ROLL OF LEAD-FREE
SOFT SOLDER
SOLDER
FLUX
PREP
ARA
TIONS FOR INST
ALLA
TION
PREPARA
ARATIONS
INSTALLA
ALLATION
Removing the Old Water Heater
4. Attach a hose to the water heater
drain valve and put the other end
in a floor drain or outdoors. Open
the water heater drain valve. Open
a nearby hot water faucet which will
relieve pressure in the water
heater and speed draining. The
water passing out of the drain valve
may be extremely hot. To avoid
being scalded, make sure all
connections are tight and that the
water flow is directed away from
any person, see Figures 1 and 4.
FIGURE 4.
5. Disconnect the vent pipe from the draft hood where they
connect to the water heater. In most installations the vent
pipe can be lifted off after any screw or other attached devices
are removed. Dispose of the draft hood. The new water
heater has the draft hood which must be used for proper
operation.
6. If you have copper piping to the water heater, the two copper
water pipes can be cut with a hacksaw approximately four
inches away from where they connect to the water heater.
This will avoid cutting off pipes too short. Additional cuts can
be made later if necessary. Disconnect the temperaturepressure relief valve drain line. When the water heater is
drained, disconnect the hose from the drain valve. Close the
drain valve. The water heater is now completely disconnected
and ready to be removed, see Figure 5.
FIGURE 1.
1. Turn “OFF” the gas supply to the
water heater.
If the main gas line Shut-off valve
serving all gas appliances is
used, also shut “OFF” the gas at
each appliance. Leave all gas
appliances shut “OFF” until the
water heater installation is
completed, see Figures 1 and 2.
2. Turn “OFF” the water supply to the
water heater at the water shut-off
valve or water meter. Some
installations require that the water
be turned off to the entire house,
see Figures 1 and 3.
FIGURE 2.
FIGURE 5.
If you have galvanized pipe to the water heater, loosen the
two galvanized pipes with a pipe wrench at the union in each
line. Also disconnect the piping remaining to the water heater.
These pieces should be saved since they may be needed
when reconnecting the new water heater. Disconnect the
temperature-pressure relief valve drain line. When the water
heater is drained, disconnect the hose from the drain valve.
Close the drain valve. The water heater is now completely
disconnected and ready to be removed. Mineral buildup or
sediment may have accumulated in the old water heater.
This causes the water heater to be much heavier than normal
and this residue, if spilled out, could cause staining, see
Figure 6.
FIGURE 3.
3. Check again to make sure the gas supply is “OFF” to the
water heater. Then disconnect the gas supply connection
from the gas control valve.
FIGURE 6.
7
TYPICAL INST
ALLA
TION
INSTALLA
ALLATION
GET TO KNOW YOUR WATER HEATER - GAS MODELS
A
B
C
D
E
F
G
H
I
Vent Pipe
Draft Hood
Anode
Hot Water Outlet
Outlet
Water Connections
Gas Supply
Manual Gas Shut-off Valve
Ground Joint Union
J
K
L
M
N
O
P
Q
R
Drip Leg (Sediment Trap)
Inner Door
Outer door
Union
Inlet Water Shut-off Valve
Cold Water Inlet
Inlet Dip Tube
Temperature-Pressure Relief Valve
Rating Plate
* INSTALL IN ACCORDANCE
WITH LOCAL CODES.
S
T
U
V
W
X
Y
Flue Baffle(s)
Thermostat
Drain Valve
Pilot and Main Burner
Flue
Drain Pan
Thermostat Shield (optional)
(T) THERMOSTAT
* DRIP LEG AS REQUIRED
BY LOCAL CODES.
TO VENT TERMINATION
ON ROOF
Y
THERMOSTAT
SHIELD
(OPTIONAL)
(V) PILOT & MAIN BURNER - NATURAL GAS
(V) PILOT & MAIN BURNER - PROPANE GAS
THERMOCOUPLE
PILOT
BURNER
* ALL PIPING MATERIALS TO BE
SUPPLIED BY CUSTOMERS.
** CLOSED WATER SYSTEMS ARE THOSE WITH
BACK FLOW PREVENTION DEVICES INSTALLED
IN THE INLET WATER SERVICE LINE.
FIGURE 7.
8
MAIN
BURNER
TYPICAL INST
ALLA
TION
INSTALLA
ALLATION
MIXING VALVE USAGE
FIGURE 8.
This appliance has been design certified as complying with
American National Standard/CSA Standard for water heaters
and is considered suitable for:
HOTTER WATER CAN SCALD:
Water heaters are intended to produce hot water. Water heated
to a temperature which will satisfy clothes washing, dish
washing, and other sanitizing needs can scald and permanently
injure you upon contact. Some people are more likely to be
permanently injured by hot water than others. These include
the elderly, children, the infirm, or physically/mentally
handicapped. If anyone using hot water in your home fits into
one of these groups or if there is a local code or state law
requiring a certain temperature water at the hot water tap, then
you must take special precautions. In addition to using the
lowest possible temperature setting that satisfies your hot water
needs, a means such as a *Mixing Valve, shall be used at the
hot water taps used by these people or at the water heater.
Mixing valves are available at a plumbing supply distributor, see
Figure 8. Valves for reducing point of use, temperature by mixing
cold and hot water are also available. Consult Maytag Customer
Service at 1-800-788-8899. Follow mixing valve manufacturer’s
instructions for installation of the valves. Before changing the
factory setting on the thermostat, read the “Temperature
Regulation” section in this manual, see Figures 22 and 23 on
page 21.
Water (Potable) Heating: All models are considered suitable
for water (potable) heating.
9
LOCA
TING AND INST
ALLING THE NEW W
ATER HEA
TER
OCATING
INSTALLING
WA
HEATER
water pipes connected to the water heater.
Facts to Consider About the Location
• Devices that will turn off the gas supply to a gas water heater
while at the same time shutting off its water supply.
Carefully choose an indoor location for the new water heater,
because the placement is a very important consideration for
the safety of the occupants in the building and for the most
economical use of the appliance. This water heater is not for
use in manufactured (mobile) homes or outdoor installation.
Whether replacing an old water heater or putting the water heater
in a new location, the following critical points must be observed:
• Select a location indoors as close as practical to the gas
vent or chimney to which the water heater vent is going to be
connected, and as centralized with the water piping system
as possible.
• Selected location must provide adequate clearances for
servicing and proper operation of the water heater.
Installation of the water heater must be accomplished in such a
manner that if the tank or any connections should leak, the flow
will not cause damage to the structure. For this reason, it is not
advisable to install the water heater in an attic or upper floor.
When such locations cannot be avoided, a suitable drain pan
should be installed under the water heater. Drain pans are
available at your local distributor. Such a drain pan must have a
minimum length and width of at least 2 inches (51 mm) greater
than the water heater dimensions and must be piped to an
adequate drain. The pan must not restrict combustion air flow.
• Sensors mounted in the drain pan that turn off the water
supply to the entire home when water is detected in the drain
pan.
INSTALLATIONS IN AREAS WHERE FLAMMABLE LIQUIDS
(VAPORS) ARE LIKELY TO BE PRESENT OR STORED
(GARAGES, STORAGE AND UTILITY AREAS, ETC.):
Flammable liquids (such as gasoline, solvents, propane [LP or
butane, etc.] and other substances such as adhesives, etc.)
emit flammable vapors which can be ignited by a gas water
heater’s pilot light or main burner. The resulting flashback and
fire can cause death or serious burns to anyone in the area, as
well as property damage. If installation in such areas is your
only option, then installation must be accomplished in a way
that the pilot flame and main burner flame are elevated from the
floor at least 18 inches. While this may reduce the chances of
flammable vapors, from a floor spill being ignited, gasoline and
other flammable substances should never be stored or used in
the same room or area containing a gas water heater or other
open flame or spark producing appliance. NOTE: Flammable
vapors may be drawn by air currents from other areas of the
structure to the appliance.
• Water supply shut-off devices that activate based on the
water pressure differential between the cold water and hot
Also, the water heater must be located and/or protected so it is
not subject to physical damage by a moving vehicle.
Water heater life depends upon water quality, water pressure
and the environment in which the water heater is installed. Water
heaters are sometimes installed in locations where leakage
may result in property damage, even with the use of a drain pan
piped to a drain. However, unanticipated damage can be reduced
or prevented by a leak detector or water shut-off device used in
conjunction with a piped drain pan. These devices are available
from some plumbing supply wholesalers and retailers, and
detect and react to leakage in various ways:
• Sensors mounted in the drain pan that trigger an alarm or
turn off the incoming water to the water heater when leakage
is detected.
10
A gas water heater cannot operate properly without the correct
amount of air for combustion. Do not install in a confined area
such as a closet, unless you provide air as shown in the
Locating and Installing The New Water Heater section. Never
obstruct the flow of ventilation air. If you have any doubts or
questions at all, call your gas supplier. Failure to provide the
proper amount of combustion air can result in a fire or explosion
and cause death, serious bodily injury, or property damage.
This water heater must not be installed directly on carpeting.
Carpeting must be protected by metal or wood panel beneath
the appliance extending beyond the full width and depth of the
appliance by at least 3 inches (76.2 mm) in any direction, or if
the appliance is installed in an alcove or closet, the entire floor
must be covered by the panel. Failure to heed this warning
may result in a fire hazard.
FIGURE 10.
If this water heater will be used in beauty shops, barber shops,
cleaning establishments, or self-service laundries with dry
cleaning equipment, it is imperative that the water heater or
water heaters be installed so that combustion and ventilation
air be taken from outside these areas.
Propellants of aerosol sprays and volatile compounds,
(cleaners, chlorine based chemicals, refrigerants, etc.) in
addition to being highly flammable in many cases, will also
change to corrosive hydrochloric acid when exposed to the
combustion products of the water heater. The results can be
hazardous, and also cause product failure.
Minimum clearances between the water heater and
combustible construction are 0 inch at the sides and rear, 4
inches (102 mm) at the front, and 6 inches (153 mm) from the
vent pipe. Clearance from the top of the jacket is 12 inches
(305 mm) on most models. Note that a lesser dimension may
be allowed on some models, refer to the label attached adjacent
to the gas control valve on the water heater, see Figure 9.
Insulation Blankets
Insulation blankets available to the general public for external
use on gas water heaters are not necessary with Maytag
products. The purpose of an insulation blanket is to reduce the
standby heat loss encountered with storage tank heaters. Your
Maytag water heater meets or exceeds the EPACT standards
with respect to insulation and standby loss requirements,
making an insulation blanket unnecessary.
FIGURE 9.
WARNING
Should you choose to apply an insulation blanket to this heater,
you should follow these instructions (See Figure 7 for
identification of components mentioned below). Failure to follow
these instructions can restrict the air flow required for proper
11
combustion, potentially resulting in fire, asphyxiation, serious
personal injury or death.
commence within 12 inches (30 cm) of the top and one
commencing within 12 inches (30 cm) of the bottom of the
enclosures.
• Do not apply insulation to the top of the water heater, as this
will interfere with safe operation of the draft hood.
• Do not cover the outer door, thermostat or temperature &
pressure relief valve.
• Do not allow insulation to come within 2” (50.8 mm) of the
floor to prevent blockage of combustion air flow to the burner.
• Do not cover the instruction manual. Keep it on the side of
the water heater or nearby for future reference.
• Do obtain new warning and instruction labels from Maytag
for placement on the blanket directly over the existing labels.
• Do inspect the insulation blanket frequently to make certain
it does not sag, thereby obstructing combustion air flow.
FIGURE 11.
B. ALL AIR FROM OUTDOORS: (See Figures 12, 13 and 14)
Combustion Air and Ventilation for
Appliances Located in Unconfined Spaces
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.
UNCONFINED SPACE is space whose volume is not less than
50 cubic feet per 1,000 Btu per hour (4.8 m3 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 m3 per kW) of the
aggregate input rating of all appliances installed in that space.
A. ALL AIR FROM INSIDE BUILDINGS:
(See Figures 10 and 11)
FIGURE 12.
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 1,000 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 cm 2). One opening shall
• When directly communicating with the outdoors, 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.
• 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 13.
12
Water Piping
FIGURE 13.
HOTTER WATER CAN SCALD:
Water heaters are intended to produce hot water. Water heated
to a temperature which will satisfy clothes washing, dish
washing, cleaning and other sanitizing needs can scald and
permanently injure you upon contact. Some people are more
likely to be permanently injured by hot water than others. These
include the elderly, children, the infirm, or physically/mentally
handicapped. If anyone using hot water in your home fits
into one of these groups or if there is a local code or state law
requiring a certain temperature water at the hot water tap, then
you must take special precautions. In addition to using the
lowest possible temperature setting that satisfies your hot water
needs, a means such as a *mixing valve, shall be used at
the hot water taps used by these people or at the water heater.
Mixing valves are available at a plumbing supply distributor,
see Figure 8 on page 9 and Figure 15 below. Valves for reducing
point of use temperature by mixing cold and hot water are
also available. Consult Maytag Customer Service at
1-800-788-8899. Follow manufacturer’s instructions for
installation of the valves. Before changing the factory setting
on the thermostat, read the Temperature Regulation section in
this manual.
• 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 14.
• When ducts are used, they shall be of the same crosssectional 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 mm), see Figure 14.
FIGURE 14.
• Louvers and Grilles: In calculating free area, consideration
shall be given to the blocking effect of louvers, grilles or
screens protecting openings. Screens used shall not be
smaller than 1/4 inch (6.4 mm) mesh. If the free area through
a design of louver or grille is known, it should be used in
calculating the size opening required to provide the free
area specified. If the design and free area is not known, it
may be assumed that wood louvers will be 20-25 percent
free area and metal louvers and grilles will have 60-75
percent free area. Louvers and grilles shall be fixed in the
open position or interlocked with the equipment so that they
are opened automatically during equipment operation.
FIGURE 15.
• Special Conditions Created by Mechanical Exhausting or
Fireplaces: operation of exhaust fans, ventilation systems,
clothes dryers or fireplaces may create conditions requiring
special attention to avoid unsatisfactory operation of installed
gas utilization equipment.
This water heater shall not be connected to any heating systems
or component(s) used with a non-potable water heating
appliance.
13
Toxic chemicals, such as those used for boiler treatment shall
not be introduced into this system.
can be accomplished by insulating the hot water lines
from the water heater.
Water supply systems 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 the 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 to relieve
the pressure built by thermal expansion in the water system.
Refer to the Thermal Expansion section under Troubleshooting
Guide or contact local plumbing authority or call Maytag
Customer Service at 1-800-788-8899 for an authorized
installer on how to control this situation.
FIGURE 16.
Temperature-Pressure Relief Valve
NOTE: To protect against untimely corrosion of hot and cold
water fittings, it is strongly recommended that di-electric
unions or couplings be installed on this water heater when
connected to copper pipe.
Figure 16 shows the typical attachment of the water piping to
the water heater. The water heater is equipped with 1” NPT
water connections for 75 gallon models.
NOTE: If using copper tubing, solder tubing to an adapter
before attaching the adapter to the water connections. Do
not solder the water lines directly to the water connections
on the tank. It will harm the dip tube and damage the tank.
• Look at the top cover of the water heater. The water outlet is
marked “HOT”. Put two or three turns of teflon tape around
the exposed end of the 1” NPT threaded nipple. Connect the
hot water pipe to the hot water outlet on the water heater.
This heater is provided with a properly certified combination
temperature - pressure relief valve by the manufacturer.
• Look at the top of the water heater. The cold water inlet is
marked “COLD”. Put two or three turns of teflon tape around
the exposed end of the 1” NPT threaded nipple. Connect the
cold water pipe to the cold water inlet of the water heater.
The valve is certified by a nationally recognized testing
laboratory that maintains periodic inspection of production of
listed equipment of materials as meeting the requirements for
Relief Valves for Hot Water Supply Systems, ANSI Z21.22-CSA
4.4 and the code requirements of ASME.
NOTE: This water heater is super insulated to minimize
heat loss from the tank. Further reduction in heat loss
14
If replaced, the valve must meet the requirements of local
codes, but not less than a combination temperature and
pressure relief valve certified as indicated in the above
paragraph.
The valve must be marked with a maximum set pressure not to
exceed the marked maximum working pressure of the water
heater (150 psi = 1,035 kPa) and a discharge capacity not less
than the water heater input rate as shown on the model rating
plate.
The Discharge Pipe:
For safe operation of the water heater, the relief valve must not
be removed from its designated opening nor plugged.
• Shall not be smaller in size than the outlet pipe size of the
valve, or have any reducing couplings or other restrictions.
The temperature-pressure relief valve must be installed directly
into the fitting of the water heater designed for the relief valve.
Position the valve downward and provide tubing so that any
discharge will exit only within 6 inches (153 mm) above, or at
any distance below the structural floor. Be certain that no contact
is made with any live electrical part. The discharge opening
must not be blocked or reduced in size under any
circumstances. Excessive length, over 30 feet (9.14 m), or use
of more than four elbows can cause restriction and reduce the
discharge capacity of the valve, see Figure 17.
• Shall not be plugged or blocked.
• Shall be of material listed for hot water distribution.
• Shall be installed so as to allow complete drainage of both
the temperature-pressure relief valve, and the discharge
pipe.
• Shall terminate at an adequate drain.
• Shall not have any valve between the relief valve and tank.
No valve or other obstruction is to be placed between the relief
valve and the tank. Do not connect tubing directly to discharge
drain unless a 6 inch air gap is provided. To prevent bodily
injury, hazard to life, or property damage, the relief valve must
be allowed to discharge water in quantities should
circumstances demand. If the discharge pipe is not connected
to a drain or other suitable means, the water flow may cause
property damage.
The temperature-pressure relief valve must be manually
operated at least once a year. Caution should be taken to
ensure that (1) no one is in front of or around the outlet of the
temperature-pressure relief valve discharge line, and (2) the
water manually discharged will not cause any bodily injury or
property damage because the water may be extremely hot.
If after manually operating the valve, it fails to completely reset
and continues to release water, immediately close the cold
water inlet to the water heater, follow the draining instructions,
and replace the temperature-pressure relief valve with a new
one.
Filling the Water Heater
FIGURE 17.
15
Never use this water heater unless it is completely full of water.
To prevent damage to the tank, the tank must be filled with
water. Water must flow from the hot water faucet before turning
“ON” gas to the water heater.
To insure proper venting of this gas-fired water heater, the
correct vent pipe diameter must be utilized. Any additions or
deletions of other gas appliances on a common vent with
this water heater may adversely affect the operation of the
water heater. Consult your Maytag Customer Service Center
at 1-800-788-8899 or gas supplier if any such changes are
planned.
To fill the water heater with water:
• Close the water heater drain valve by turning the handle to
the right (clockwise). The drain valve is on the lower front of
the water heater.
For proper venting in certain installations, a larger diameter
vent pipe may be necessary. Consult your Maytag Customer
Service Center at 1-800-788-8899 or gas supplier to aid you
in determining the proper venting for your water heater from
the vent tables in the current edition of the National Fuel Gas
Code ANSI Z223.1/NFPA 54.
• Open the cold water supply valve to the water heater.
NOTE: The cold water supply valve must be left open when
the water heater is in use.
Periodically check the venting system for signs of obstruction
or deterioration and replace if needed.
• To insure complete filling of the tank, allow air to exit by
opening the nearest hot water faucet. Allow water to run
until a constant flow is obtained. This will let air out of the
water heater and the piping.
The combustion and ventilation air flow must not be obstructed.
The water heater with draft hood installed must be connected
to a chimney or listed vent pipe system, which terminates to
the outdoors. Never operate the water heater unless it is vented
to the outdoors and has adequate air supply to avoid risks of
improper operation, explosion or asphyxiation.
• Check all water piping and connections for leaks. Repair
as needed.
Venting
• For proper draft hood attachment, the draft hood legs may
be angled slightly inward.
VENT DAMPERS - Any vent damper, whether it is operated
thermally or otherwise must be removed if its use inhibits proper
drafting of the water heater.
• Place the draft hood legs in the receiving holes on the top of
the water heater. The legs will snap in the holes to give a
tight fit. Secure draft hood with the supplied brackets.
Thermally Operated Vent Dampers: This gas-fired water
heater has a thermal efficiency at or above 80% which may
produce a relatively low flue gas temperature. Such
temperatures may not be high enough to properly open
thermally operated vent dampers. This would cause spillage
of the flue gases and may cause carbon monoxide poisoning.
• Place the vent pipe over the draft hood. With the vent pipe in
position, drill a small hole through both the vent pipe and
draft hood. Secure them together with a sheet metal screw,
see Figure 18.
Obstructed or deteriorated vent systems may present serious
health risk or asphyxiation.
Vent dampers must bear evidence of certification as complying
with the current edition of the American National Standard
ANSI Z21.66/CGA 6.14, (covering electrically and mechanically
actuated vent dampers). Before installation of any vent damper,
consult your Maytag Customer Service Center at 1-800-7888899 or the local gas supplier for further information.
FIGURE 18.
The vent pipe from the water heater must be no less than the
diameter of the draft hood outlet on the water heater and must
slope upward at least 1/4 inch per linear foot (21 mm per meter),
see Figure 19.
FIGURE 19.
16
All vent gases must be completely vented to the outdoors of the
structure (dwelling). Install only the draft hood provided with
the new water heater and no other draft hood.
Make sure the gas supplied is the same type listed on the
model rating plate. The inlet gas pressure must not exceed
14 inch water column (2.6kPa) for natural and propane (L.P.)
gas. If the gas control valve is subjected to pressures exceeding
1/2 pound per square inch (3.5kPa), the damage to the gas
control valve could result in a fire or explosion from leaking
gas.
Vent pipes must be secured at each joint with sheet metal
screws.
There must be a minimum of 6 inches (153 mm) clearance
between single wall vent pipe and any combustible material.
Fill and seal any clearance between single wall vent pipe and
combustible material with mortar mix, cement, or other
noncombustible substance. For other than single wall, follow
vent pipe manufacturer’s clearance specifications. To insure
a tight fit of the vent pipe in a brick chimney, seal around the
vent pipe with mortar mix cement.
If the main gas line Shut-off serving all gas appliances is used,
also turn “OFF” the gas at each appliance. Leave all gas
appliances shut “OFF” until the water heater installation is
complete.
A gas line of sufficient size must be run to the water heater.
Consult the current edition of National Fuel Gas Code ANSI
Z223.1/NFPA 54 and your gas supplier concerning pipe size.
There must be:
• A readily accessible manual shut off valve in the gas supply
line serving the water heater, and
• A drip leg (sediment trap) ahead of the gas control valve to
help prevent dirt and foreign materials from entering the
gas control valve.
• A flexible gas connector or a ground joint union between the
shut off valve and control valve to permit servicing of the unit.
Be sure to check all the gas piping for leaks before lighting the
water heater. Use a soapy water solution, not a match or open
flame. Rinse off soapy solution and wipe dry.
The minimum inlet gas pressure shown on the rating plate is
that which will permit firing at the rated input.
Failure to have required clearances between vent piping and
combustible material will result in a fire hazard.
Be sure vent pipe is properly connected to prevent escape of
dangerous flue gases which could cause deadly asphyxiation.
Chemical vapor corrosion of the flue and vent system may
occur if air for combustion contains certain chemical vapors.
Spray can propellants, cleaning solvents, refrigerator and air
conditioner refrigerants, swimming pool chemicals, calcium
and sodium chloride, waxes, bleach and process chemicals
are typical compounds which are potentially corrosive.
Gas Piping
Standard Models are for installation up to 2,000 feet (610 m)
above sea level.
High Altitude models are for installation from 2,000 feet
(610 m) to 4,500 feet (1,370 m) above sea level.
If a standard model is installed above 2,000 feet (610 m) or
high altitude model is installed above 4,500 feet (1,370 m), the
input rating should be reduced at the rate of 4 percent for each
1000 feet (305 m) above sea level which requires replacement
of the burner orifice in accordance with National Fuel Gas Code
ANSI Z223.1/NFPA 54. Contact Maytag Customer Service
Center at 1-800-788-8899 or your local gas supplier or call
for further information.
17
Failure to replace the standard orifice with a high altitude orifice
when installed at elevations above 2,000 feet (610 m) or above
4,500 feet (1,370 m) for high altitude model could result in
improper and inefficient operation of the appliance, producing
carbon monoxide gas in excess of safe limits, which could
result in serious injury or death. Contact Maytag Customer
Service at 1-800-788-8899 or your local gas supplier for any
specific changes which may be required in your area.
Contaminants in the gas lines may cause improper operation
of the gas control valve that may result in fire or explosion.
Before attaching the gas line be sure that all gas pipe is clean
on the inside. To trap any dirt or foreign material in the gas
supply line, a drip leg (sometimes called a sediment trap)
must be incorporated in the piping. The drip leg must be readily
accessible. Install in accordance with the Gas Piping section.
Refer to the current edition of the National Fuel Gas Code,
ANSI Z223.1/NFPA 54.
A sediment trap shall be installed as close to the inlet of the
water heater as practical at the time of water heater installation.
The sediment trap shall be either a tee fitting with a capped
nipple in the bottom outlet or other device recognized as an
effective sediment trap. If a tee fitting is used, it shall be installed
in conformance with one of the methods of installation, shown
in Figures 20 and 21.
Use pipe joint compound or teflon tape marked as being
resistant to the action of petroleum (Propane [L.P.]) gases.
The appliance and its gas connection must be leak tested
before placing the appliance in operation.
The appliance and its individual Shut-off valve shall be
disconnected from the gas supply piping system during any
pressure testing of that system at test pressures in excess of
1/2 pound per square inch (3.5kPa). It shall be isolated from
the gas supply piping system by closing its individual manual
Shut-off valve during any pressure testing of the gas supply
piping system at test pressures equal to or less than 1/2 pound
per square inch (3.5kPa).
FIGURE 20. GAS PIPING WITH FLEXIBLE CONNECTOR.
Connecting the gas piping to the gas control valve of the water
heater can be accomplished by either of the two methods,
shown in Figures 20 and 21.
Sediment Traps
FIGURE 21. GAS PIPING WITH ALL
BLACK IRON PIPE TO GAS CONTROL.
18
OPERA
TING INSTRUCTIONS
OPERATING
FOR YOUR SAFETY READ BEFORE LIGHTING
WARNING:
If you do not follow these instructions exactly, a fire or
explosion may result causing property damage, personal injury or loss of life.
BEFORE OPERATING: ENTIRE SYSTEM MUST BE FILLED WITH WATER AND AIR PURGED AT FAUCETS.
A. This appliance has a pilot which must be lighted by
hand. When lighting the pilot, follow these instructions
exactly.
B. BEFORE LIGHTING smell all around the appliance area
for gas. Be sure to smell next to the floor because some
gas is heavier than air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Do not touch any electric switch; do not use any phone
in your building.
• Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
•
If you cannot reach your gas supplier, call the fire
department.
C. Use only your hand to push down or turn the gas control
knob. Never use tools. If the knob will not push down or
turn by hand, don’t try to repair it, call a qualified service
technician . Force or attempted repair may result in a fire
or explosion.
D. Do not use this appliance if any part has been under
water. Immediately call a qualified service technician to
inspect the appliance and to replace any part of the
control system and any gas control which has been
under water.
LIGHTING INSTRUCTIONS
FIGURE “D”
TOP VIEW
GAS CONTROL
1.
8. Push gas control knob down all the way and hold it
down. Immediately light pilot with a match. Continue to
hold the gas control knob down for about one (1) minute
after the pilot is lit. Release the gas control knob and it
will pop back up. Pilot should remain lit. If it goes out,
repeat Steps 3 through 8. It may take several minutes
for air to clear the lines before the pilot will light.
STOP! Read the safety information above
on this label.
2. Set the thermostat to lowest setting by turning thermostat
until it stops.
dial fully clockwise
3. Push the gas control knob down slightly and turn
to “OFF”, (Figure “A”).
clockwise
•
NOTE: Gas control knob CANNOT be turned from “PILOT”
to “OFF” unless it is pushed down slightly. Do not force.
•
4. Remove the inner and outer doors located below and
behind the gas control unit.
If knob does not pop up when released , stop and
immediately call your service technician or gas
supplier.
If the pilot will not stay lit, after several tries,
turn the gas control knob to “OFF”, (Figure “A”)
and call your service technician or gas supplier.
5. Wait five (5) minutes to clear out any gas. If you then
smell gas
STOP! Follow “B” in the safety
information
above on this label. If you don’t smell
gas, go to next step.
9.
6. Find pilot. Follow metal tube from the bottom, right of the
gas control to the pilot burner, (Figure “D”).
11. Set thermostat to desired setting (See Figure).
7. Turn gas control knob counterclockwise to
(Figure “B”).
Replace inner and outer burner doors.
10. At arm’s length away, turn control knob
counterclockwise
to on. (Figure “C”).
CAUTION: Hotter water increases the
risk of scald injury. Consult the instruction
manual before changing temperature.
“PILOT”.
TO TURN OFF GAS TO APPLIANCE
1. Set thermostat to the lowest setting.
2. Push gas control knob down slightly and turn clockwise
to “OFF”. Do not force. SEE FIGURE “A”.
19
FOR YOUR SAFETY READ BEFORE LIGHTING
WARNING: If you do not follow these instructions exactly, a fire or
explosion may result causing property damage, personal injury or loss of life.
BEFORE LIGHTING: ENTIRE SYSTEM MUST BE FILLED WITH WATER AND AIR PURGED AT FAUCETS.
A.
B.
This appliance has a pilot which must be lighted by hand.
When lighting the pilot, follow these instructions exactly.
BEFORE LIGHTING: smell all around the appliance area
for gas. Be sure to smell next to the floor because some
gas is heavier than air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric switch; do not use
any phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
•
C.
D.
If you cannot reach your gas supplier, call the
fire department.
Use only your hand to push down or turn the gas control
knob. Never use tools. If the knob will not push down or
turn by hand, don’t try to repair it, call a qualified service
technician. Force or attempted repair may result in a fire
or explosion.
Do not use this appliance if any part has been under
water. Immediately call a qualified service technician to
inspect the appliance and to replace any part of the
control system and any gas control which has been
under water.
LIGHTING INSTRUCTIONS
1.
2.
3.
4.
5.
6.
7.
8.
FIGURE D.
TOP VIEW
FIGURE 1.
the gas control knob down for about one (1) minute
after the pilot is lit. Release the gas control knob and it
will pop back up. Pilot should remain lit. If it goes out,
repeat Steps 3 through 8. It may take several minutes for
air to clear the lines, before the pilot will light.
• If knob does not pop up when released, stop and
immediately call your service technician or gas
supplier.
• If the pilot will not stay lit after several tries, turn the
gas control knob to "OFF" (Figure A) and call your
service technician or gas supplier.
9. Replace inner and outer burner doors.
10. At arm's length away, turn the gas control knob
counterclockwise
to on (Figure C).
11. Set thermostat to desired setting (See Figure 1).
STOP! Read the safety information above on
this label.
Set the thermostat to the lowest setting by turning
thermostat dial fully clockwise
until it stops.
Push the gas control knob down slightly and turn clockwise
to "OFF" (Figure A).
NOTE: Gas control knob CANNOT be turned from "PILOT"
to "OFF" unless it is pushed down slightly. Do not force.
Remove the inner and outer doors located below and
behind the gas control unit.
Wait five (5) minutes to clear out any gas. If you then
smell gas
STOP! Follow "B" in the safety information
above on
this label. If you do not smell gas, go to
the next step.
Find Pilot. Follow metal tube from the bottom , right of the
gas control to the pilot burner. (Figure D).
Turn gas control knob counterclockwise
to "PILOT"
(Figure B).
Push gas control knob down all the way and hold it down.
Immediately light the pilot with a match. Continue to hold
CAUTION: Hotter water increases the risk of
scald injury. Consult the instruction manual
before changing temperature.
TO TURN OFF GAS TO APPLIANCE
1. Set the thermostat to lowest setting.
2. Push gas control knob down slightly and turn clockwise
to “OFF”. Do not force, see Figure A.
20
instructions for installation of the valves. Before changing the
factory setting on the thermostat, read the Temperature
Regulation section in this manual, see Figures 22 and 23.
Temperature Regulation
Short repeated heating cycles caused by small hot water uses
can cause temperatures at the point of use to exceed the
thermostat setting by up to 30°F (16.7°C). If you experience this
type of use you should consider using lower temperature
settings to reduce scald hazards.
Never allow small children to use a hot water tap, or to draw
their own bath water. Never leave a child or handicapped person
unattended in a bathtub or shower.
NOTE: A water temperature range of 120°F-140°F (49°C-60°C)
is recommended by most dishwasher manufacturers.
Any water heater’s intended purpose is to heat water. Hot
water is needed for cleansing, cleaning, and sanitizing (bodies,
dishes, clothing). Untempered hot water can present a scald
hazard. Depending on the time element, and the people
involved (adults, children, elderly, infirm, etc.) scalding may occur
at different temperatures.
The thermostat of this water heater has been factory set at its
lowest position (PILOT LIGHTING). It is adjustable and must
be reset to the desired temperature setting to reduce the risk of
scald injury. The mark ( ) indicative of approximately 120°F
(49°C) is preferred starting point. Some states have a
requirement for a lower setting.
) to decrease
Turn the water temperature dial clockwise (
the temperature, or counterclockwise (
) to increase the
temperature.
Should overheating occur or the gas supply fail to shut off, turn
off the manual gas control valve to the appliance.
HOTTER WATER CAN SCALD: Water heaters are intended to
produce hot water. Water heated to a temperature which will
satisfy clothes washing, dish washing, and other sanitizing
needs can scald and permanently injure you upon contact.
Some people are more likely to be permanently injured by hot
water than others. These include the elderly, children, the infirm,
or physically/mentally handicapped. If anyone using hot water
in your home fits into one of these groups or if there is a local
code or state law requiring a certain temperature water at the
hot water tap, then you must take special precautions. In
addition to using the lowest possible temperature setting that
satisfies your hot water needs, a means such as a mixing
valve, shall be used at the hot water taps used by these people
or at the water heater. Mixing valves are available at a plumbing
supply distributor, see Figure 8 on page 9 and Figure 15 on
page 13. Valves for reducing point of use temperature by mixing
cold and hot water are also available. Consult Maytag
Customer Service at 1-800-788-8899. Follow manufacturer’s
FIGURE 22.
Temperature
Settings
Time to Produce 2nd & 3rd
Degree Burns on Adult Skin
VERY HOT= approx. 160°F (71°C)
C = approx. 150°F (66°C)
About 1-1/2 seconds
B = approx. 140°F (60°C)
Less than 5 seconds
A = approx. 130°F (54°C)
= approx. 120°F (49°C)
LOW = approx. 80°F (27°C)
FIGURE 23.
21
About 1/2 second
About 30 seconds
More than 5 minutes
----------------
SERVICE AND MAINTENANCE
Tank (Sediment) Cleaning
Burner Inspection
Sediment build-up on the tank bottom may create varying
amount of noise, if left in the tank will cause permanent tank
failure. In some water areas, sediment can be removed by
draining off approximately one gallon of water each month.
Flood damage to a water heater may not be readily visible or
immediately detectable. However, over a period of time a
flooded water heater will create dangerous conditions which
can cause DEATH, SERIOUS BODILY INJURY, OR PROPERTY
DAMAGE. Contact the Maytag dealer from whom the appliance
was purchased or call Maytag Customer Service at
1-800-788-8899 for an authorized servicer to replace a
flooded water heater. Do not attempt to repair the unit! It
must be replaced!
Vent System Inspection
At least once a year a visual inspection should be made of the
main burner and pilot burner, see Figure 24.
You should check for sooting. Soot is not normal and will impair
proper combustion.
Soot build-up indicates a problem that requires correction
before further use. Turn “OFF” gas to water heater and
leave off until repairs are made, because failure to correct the
cause of the sooting can result in a fire causing death, serious
injury, or property damage.
NATURAL
At least once a year a visual inspection should be made of the
venting system. You should look for:
• Obstructions which could cause improper venting. The
combustion and ventilation air flow must not be obstructed.
PROPANE
• Damage or deterioration which could cause improper
venting or leakage of combustion products.
• Rusted flakes around top of water heater.
Be sure the vent piping is properly connected to prevent
escape of dangerous flue gases which could cause deadly
asphyxiation.
Obstructions and deteriorated vent systems may present
serious health risk or asphyxiation.
FIGURE 24.
Chemical vapor corrosion of the flue and vent system may
occur if air for combustion contains certain chemical vapors.
Spray can propellants, cleaning solvents, refrigerator and air
conditioner refrigerants, swimming pool chemicals, calcium
and sodium chloride, waxes, bleach and process chemicals
are typical compounds which are potentially corrosive.
Burner Cleaning
If inspection of the burner shows that cleaning is required, turn
the gas control knob clockwise (
) to the “OFF” position,
depressing slightly.
If after inspection of the vent system you found sooting or
deterioration, something is wrong. Call Maytag Customer
Service at 1-800-788-8899 for an authorized servicer or your
local gas supplier to correct the problem and clean or replace
the flue and venting before resuming operation of the water
heater.
NOTE: The knob cannot be turned from “PILOT” to “OFF”
unless knob is depressed slightly. DO NOT FORCE.
Loose deposits on or around the burner can be removed by
carefully using the hose of a vacuum cleaner inserted through
the access door of the water heater. If the Burner needs to be
22
removed for additional cleaning, call Maytag Customer Service
at 1-800-788-8899 for an authorized servicer to remove and
clean the burner and correct the problem that required the
burner to be cleaned.
Temperature-Pressure Relief Valve Operation
The temperature-pressure relief valve must be manually
operated at least once a year.
Housekeeping
Vacuum around base of water heater for dust, dirt, and lint on a
regular basis.
When checking the temperature-pressure relief valve operation,
make sure that (1) no one is in front of or around the outlet of
the temperature-pressure relief valve discharge line, and (2)
that the water discharge will not cause any property damage,
as the water may be extremely hot, see Figure 25.
INSTALLED IN SUITABLE AREA: To insure sufficient ventilation
and combustion air supply, proper clearances from the water
heater must be maintained. See Facts to Consider About the
Location section. Combustible materials such as clothing,
cleaning materials, or flammable liquids, etc. must not be
placed against or adjacent to the water heater which can cause
a fire.
FIGURE 25.
If after manually operating the valve, it fails to completely reset
and continues to release water, immediately close the cold
water inlet to the water heater, follow the draining instructions,
and replace the temperature-pressure relief valve with a new
one.
Anode Rod Inspection
If the temperature-pressure relief valve on the appliance weeps
or discharges periodically, this may be due to thermal
expansion. You may have a check valve installed in the water
line or a water meter with a check valve. Consult Maytag
Customer Service at 1-800-788-8899 for further information.
Do not plug the temperature-pressure relief valve.
Draining
The water heater should be drained if being shut down during
freezing temperatures. Also periodic draining and cleaning of
sediment from the tank may be necessary.
The anode rod is used to protect the tank from corrosion. Most
hot water tanks are equipped with an anode rod. The
submerged rod sacrifices itself to protect the tank. Instead of
corroding the tank, water ions attack and eat away the anode
rod. This does not affect the water’s taste or color. The rod
must be maintained to keep the tank in operating condition.
Anode deterioration depends on water conductivity, not
necessarily water condition. A corroded or pitted anode rod
indicates high water conductivity and should be checked and/
or replaced more often than an anode rod that appears to be
intact. Replacement of a depleted anode rod can extend the
life of your water heater. Inspection should be conducted by a
qualified technician. At a minimum, the anode(s) should be
checked annually after the warranty period.
23
• Turn the gas control knob to the “OFF” position.
• Remove the washer and put the new one in place.
• CLOSE the cold water inlet valve to the water heater.
• Screw the handle and cap assembly back into the drain
valve and retighten using a wrench. DO NOT OVER
TIGHTEN.
• OPEN a nearby hot water faucet and leave open to allow for
draining.
• Follow instructions in the Filling The Water Heater section.
• Connect a hose to the drain valve and terminate to an
adequate drain.
• Check for leaks.
• Follow the lighting instructions in the Lighting section to
restart the water heater.
• OPEN the water heater drain valve to allow for tank draining.
NOTE: If the water heater is going to be shut down and
drained for an extended period, the drain valve should be
left open with hose connected allowing water to terminate
to an adequate drain.
• CLOSE the drain valve.
• Follow instructions in the Filling The Water heater section.
• Follow the lighting instructions in the Lighting section to
restart the water heater.
FIGURE 26.
Drain Valve Washer Replacement
Service
(for selected models with plastic drain valves).
(See Figure 26)
Before calling for repair service, read the Start Up Conditions
and Operational Conditions found in the Troubleshooting Guide
of this manual.
NOTE: For ordering replacement washers, refer to the
“Repair Parts List” section of this manual.
If a condition persists or you are uncertain about the operation
of the water heater, let the Maytag Customer Service check it
out.
• Turn “OFF” gas supply to water heater.
• Follow “Draining” instructions.
• Turning counter clockwise (
the screw handle.
Call Maytag Customer Service at 1-800-788-8899 for an
authorized servicer.
), remove the hex cap below
TROUBLESHOOTING
Start Up Conditions
• Large amounts of hot water are used in a short time and
the refill water in the tank is very cold.
Draft Hood Operation
Moisture from the products of combustion condense on the
cooler tank surfaces and form drops of water which may fall
onto the burner or other hot surfaces to produce a “sizzling” or
“frying” noise.
Check draft hood operation by performing a worst case
depressurization of the building. With all doors and windows
closed, and with all air handling equipment and exhaust fans
operating, such as furnaces, clothes dryers, range hoods and
bathroom fans, a match flame should still be drawn into the
draft hood of the water heater with its burner firing. If the flame
is not drawn toward the draft hood, shut off the water heater
and make necessary air supply changes to correct.
Excessive condensation can cause pilot outage due to water
running down the flue tube onto the main burner and putting
out the pilot.
Because of the suddenness and amount of water,
condensation water may be diagnosed as a “tank leak”. After
the water in the tank warms up (about 1-2 hours), the condition
should disappear.
Condensation
Do not assume the water heater is leaking until there has
been enough time for the water in the tank to warm up.
Whenever the water heater is filled with cold water, some
condensate will form while the burner is on. A water heater
may appear to be leaking when in fact the water is condensation.
This usually happens when:
• A new water heater is filled with cold water for the first time.
An undersized water heater will cause more condensation.
The water heater must be sized properly to meet the family’s
demands for hot water including dishwashers, washing
machines and shower heads.
• Burning gas produces water vapor in water heaters,
particularly high efficiency models where flue temperatures
are lower.
Excessive condensation may be noticed during the winter and
early spring months when incoming water temperatures are
at their lowest.
24
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.
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:
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.
• a concentration of sulfate in the supply water.
Thermal Expansion
• a sulfate reducing bacteria within the water heater. (This
harmless bacteria is non-toxic to humans.)
• little or no dissolved oxygen in the water.
• 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.
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.
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
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.
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.
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.
High Temperature Shut-Off System
Operational Conditions
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.
Smelly Water
In each water heater there is installed at least one anode rod
(see parts section) for corrosion protection of the tank. Certain
25
at the time of start-up after installation and when incoming
water is cold.
Turn “OFF” the entire gas supply to the water heater. Call Maytag
Customer Service at 1-800-788-8899 for an authorized
servicer.
I. Water in the water heater bottom or on the floor 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 Checkpoints
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 fitting. If cotton is wet,
follow “Draining” instructions in the Service and Maintenance
section and then remove fitting. Put pipe dope or teflon tape
on the threads and replace. Then follow Filling the Water
Heater instructions in the Locating and Installing the New
Water Heater section.
Read this manual first. 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.
Never use this water heater unless it is completely filled with
water. To prevent damage to the tank, the tank must be filled
with water. Water must flow from the hot water faucet before
turning “ON” gas to the water heater, see Figure 28.
A. Water at the draft hood is water vapor which has condensed
out of the combustion products. This is caused by a
problem in the vent. Call Maytag Customer Service at
1-800-788-8899 for an authorized servicer.
B. *Condensation may be seen on pipes in humid weather or
pipe connections may be leaking.
C. *The anode rod fitting may be leaking.
D. Small amounts of water from the temperature-pressure
relief valve may be due to thermal expansion or high water
pressure in your area.
E. *The temperature-pressure relief valve may be leaking at
the tank fitting.
F. Water from a drain valve may be due to the valve being
slightly opened.
G. *The drain valve may be leaking at the tank fitting.
H. 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 floor. This is common
FIGURE 28.
26
TROUBLESHOOTING GUIDE
These guidelines should be used by a qualified Maytag Customer Service Center Agent. Call the Maytag
Customer Service Center at 1-800-788-8899 for assistance.
Problem
WATER LEAKS
LEAKING T&P VALVE
Cause
Solution
Improperly sealed, hot or cold supply connection,
relief valve, drain valve, or thermostat threads.
Leakage from other appliances or water lines.
Condensation of flue products.
Thermal expansion in closed water system.
Improperly seated valve.
Tighten threaded connections.
High sulfate or mineral content in water supply.
Inspect other appliances near water heater.
Refer to CONDENSATION.
Install thermal expansion tank (DO NOT plug T&P valve).
Check relief valve for proper operation
(DO NOT plug T&P valve).
Drain and flush heater thoroughly, then refill.
Bacteria in water supply.
Gas control knob not positioned correctly.
Main gas supply off.
Thermocouple malfunction.
Match not to close to pilot.
Chlorinate or aerate water supply.
Refer to LIGHTING INSTRUCTIONS.
Turn on main gas shut-off valve.
Replace pilot assembly and/or thermocouple.
Locate pilot, move match closer.
Thermocouple malfunction.
Replace pilot assembly and/or thermocouple.
Defective Gas Control.
Dirty pilot burner.
Thermocouple tip is not in contact with pilot flame.
Thermocouple malfunction.
Defective Gas Control.
Heater not lit or thermostat not on.
Thermostat set too low.
Heater undersized.
Low gas pressure.
Incoming water is unusually cold.
Leaking hot water pipes or fixtures.
High temperature limit switch activated.
Replace Gas Control.
Clean pilot assembly.
Insert thermocouple correctly.
Replace pilot assembly and/or thermocouple.
Replace Gas Control.
Refer to LIGHTING INSTRUCTIONS.
Refer to TEMPERATURE REGULATION.
Reduce hot water use.
Contact your gas supplier.
Allow more time for heater to re-heat.
Have plumber check and repair leaks.
Contact a Maytag Customer Service Agent to
determine cause.
Refer to TEMPERATURE REGULATION.
Refer to CONDENSATION.
Clean sediment from tank. Refer to DRAINING
instructions in Maintenance section of manual.
No adjustment available. Contact a Maytag Customer
Service Agent to determine cause.
SMELLY WATER
PILOT WILL NOT LIGHT
BURNER WILL NOT
STAY LIT
PILOT OUTAGE
NOT ENOUGH
HOT WATER
WATER TOO HOT
WATER HEATER SOUNDS
SIZZLING - RUMBLING
SOOTING
VENT GAS ODORS
Thermostat set too high.
Condensation dripping on burner.
Sediment or calcium in bottom of heater tank.
Improper combustion.
Lack of supply air.
Improperly installed vent piping.
Downdraft.
Poor combustion.
Contact a Maytag Customer Service Agent to determine
cause.
27
REP
AIR P
ARTS LIST
REPAIR
PARTS
MAYTAG GAS WATER HEATERS
MODEL NO’S
HRX75XQRS 75 Gallon Natural Gas
HRX75CQRS 75 Gallon Propane Gas
BURNER ASSEMBLY
PROPANE BURNER ASSEMBLY
2
18
4
Maytag/State Part
Number Conversion Key
3
Key
No.
1
2
3
4
*5
6
7
*8
9
10
11
12
13
*14
15
16
17
18
19
20
21
21
17
Model Number
Part Description
Anode Rod
Burner Head
Burner Orifice - Std.
Burner Tube
Compression Fitting
Dip Tube
Draft Hood
Draft Hood Bracket
Drain Valve
Drain Valve Washer
Flue Baffle
Gas Control Valve
Inner Door
Instruction Manual
Nipple (Hot Outlet)
Outer Door
Pilot Ass’y - Std. w/Compression Fitting
Pilot Tube
T & P Relief Valve
Thermostat Shield (Optional)
Thermocouple
HRX75XQRS
66001109
66001359
66001689 (#21)
66001690
66001837
66001683
66001678
66001679
66001015
66001021
66001677
66001680
66001692
66001855
66001684
66001190
66001691
66001845
66001682
66001667
66001843
HRX75CQRS
66001109
66001834
66001841 (#38)
66001846
66001837
66001683
66001678
66001679
66001015
66001021
66001849
66001773
66001692
66001855
66001684
66001190
66001848
66001845
66001682
66001667
66001847
MAYTAG
STATE
66001015
66001021
66001109
66001190
66001359
66001667
66001677
66001678
66001679
66001680
66001682
66001683
66001684
66001689
66001690
66001691
66001692
66001773
66001834
66001837
66001841
66001843
66001845
66001846
66001847
66001848
66001849
66001855
9002401
9001584
9001830
9000358
9003040
9003696
9003736
9003737
9003738
9003739
9003741
9003742
9003743
9003732
9003733
9003734
9003735
9003656
9004089
9004106
9004105
9003923
9003925
9004229
9004094
9004231
9004096
196300-001
* Not Shown.
The model number of this gas water heater will be found on the
model rating plate located near the gas control valve.
Now that you have purchased this gas water heater, should a need
ever exist for repair parts or service, simply call Maytag Customer
Service at 1-800-788-8899 for an authorized servicer. Be sure to
provide all pertinent facts when you call or visit.
When ordering repair parts, always give the following information:
• Model number
• Serial Number
THIS IS A REPAIR PARTS LIST, NOT A PACKING LIST.
28
• Part Description
• Part Number
NOTES
29
NOTES
30
NOTES
31
WARRANTY
FULL ONE YEAR WARRANTY
For one year from the date of original retail purchase, any part which fails in normal home use will be repaired
or replaced free of charge.
If a leak occurs in the tank, a new water heater of the closest capacity and quality then available, will be
replaced free of charge.
The warranty of the replacement is the balance of the original water heater’s warranty.
LIMITED PARTS WARRANTY
After the first year and through the tenth year from the date of original retail purchase, any parts which fail due
to a defect in materials or workmanship, will be replaced or repaired free of charge for the part itself, with the
owner paying all other costs, including labor, mileage and transportation.
If the water heater is subjected to commercial, institutional, industrial or non-residential use, the above
warranty coverage for parts that are proved to be defective in material or workmanship is effective for one year
from the date of the original retail purchase.
The warranty of the replacement is the balance of the original water heater’s warranty, or twelve months from
the date of the part(s) purchase, whichever comes first.
This warranty is limited to the original owner of the water heater.
LIMITED TANK WARRANTY AGAINST LEAKS
After the first year and through the tenth year from the date of original retail purchase, if a leak occurs in the
tank, a new water heater of the closest capacity and quality then available, will be replaced free of charge for
the water heater, with the owner paying all other costs, including labor, mileage and transportation.
If the water heater is subjected to commercial, institutional, industrial or non-residential use, the above
warranty coverage for the tanks that are proved to be defective in material or workmanship is effective for two
years from the date of the original retail purchase.
The warranty of the replacement is the balance of the original water heater’s warranty.
Please note: The full and limited warranty applies only while this water heater is used in the United States of
America.
This warranty is limited to the original owner of the water heater.
TO RECEIVE WARRANTY SERVICE
To locate an authorized service company in your area contact the Maytag dealer from whom your appliance
was purchased; or call a Maytag Customer Service at the number listed below. Should you not receive
satisfactory warranty service, please call or write:
Maytag Customer Service
P.O. Box 2370
Cleveland, TN 37320-2370
U.S.A. 1-800-788-8899
When contacting Maytag Customer Service be sure to provide the model and serial number of your appliance,
the name and address of the dealer from whom you purchased the appliance and the date of purchase.
MAYTAG WATER HEATERS ARE MANUFACTURED AND THIS WARRANTY IS PROVIDED BY STATE
INDUSTRIES, INC., ASHLAND CITY, TN. MAYTAG IS A TRADEMARK OF THE MAYTAG CORPORATION AND IS
USED UNDER LICENSE TO STATE INDUSTRIES, INC.
32