Maytag Water Heater HRN4975S User Manual
Series Nine  
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  
HRN4975S  
HRN5975S  
HRP4975S  
HRP5975S  
For Your Safety  
AN ODORANT IS ADDED TO THE GAS USED  
BY THIS WATER HEATER.  
PRINTED IN THE U.S.A 1004  
PART NO. 66001853  
www.maytagwaterheaters.com  
196302-001  
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SAFETY PRECAUTIONS  
3
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TABLE OF CONTENTS  
SAFE INSTALLATION, USEAND 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  
LOCATINGAND INSTALLING THE NEW HEATER ................................................................................ 10-18  
Facts to Consider About the Location ...............................................................................................................10,11  
Insulation Blankets ............................................................................................................................................11,12  
CombustionAir and Ventilation for Appliances  
Located in Unconfined Spaces .............................................................................................................................. 12  
CombustionAir 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  
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  
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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  
(1-800-788-8899) for recommended installers.  
Abbreviations Found In This Instruction Manual:  
• EPACT - Energy Policy A ct  
• UL - Underwriters Laboratories Inc.  
• CAN - Canada  
• CSA - Canadian Standards Association  
• NFPA - National Fire Protection Association  
• ANSI - American National Standards Institute  
• ASME - American Society of Mechanical Engineers  
• GAMA - Gas Appliance Manufacturer’s Association  
•
•
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 Z21.3 • CSA 4.3 (current  
edition).  
Examine the location to ensure the water heater complies  
with the Locating and Installing the New 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 MANUALBEFOREATTEMPTING  
TO INSTALLOR 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 SPECIFICATIONS  
TANK  
CAPACITY  
IN GALS  
(LTRS)  
75 (284)  
75 (284)  
RECOVERY  
RATE GALS.  
PERHOUR  
MINIMUM  
DIMENSIONS  
IN INCHES (mm)  
HEIGHT TOP OF  
DRAFTHOOD  
61 1/8" (1,553)  
61 1/8" (1,553)  
TYPE  
OF  
GAS  
NATURAL  
PROPANE  
VENTPIPE  
INCHES  
(mm)  
4" (102)  
4" (102)  
DIAMETER  
INCHES  
(mm)  
26 3/8" (670)  
26 3/8" (670)  
BTU  
RATE  
75,100  
75,100  
*MODELNUMBER  
HRN4975S  
@90°F RISE  
81.0  
81.0  
HRP4975S  
* High altitude models HRN5975S and HRP5975S have derated B.T.U. and Recovery rates.  
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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 HAVINGA DIAMETER 22” (559 mm) OR LESSAND  
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 GALLONS (7.6 LITERS), Part No. 66001013 AND 5  
GALLONS (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.  
• Tubing Cutters or Hacksaw  
• Propane Tank  
• Soft Solder  
• Solder Flux  
• Emery Cloth  
• Pipe Wrenches (2) 14” (356 mm)  
• Screwdriver  
• Tin Snips  
• 6’ (1.82 m) Tape or Folding Ruler  
• Garden Hose  
• Wire Brushes  
• Drill  
• Pipe Dope or Teflon Tape  
DRILL  
PROPANE  
TORCH  
SLOT-HEAD SCREWDRIVER  
TUBING CUTTER  
TIN SNIPS  
PHILLIPS SCREWDRIVER  
ROLL OF  
EMERY CLOTH  
PIPE DOPE  
(SQUEEZE TUBE)  
HACKSAW  
ROLL OF TEFLON  
TAPE (USE ONLYON  
USE FOR WATER AND GAS  
WATER HEATER  
CONNECTIONS  
CONNECTIONS)  
3/4” (19 mm) WIRE BRUSH  
1/2” (13 mm) WIRE BRUSH  
SOLDER  
FLUX  
ROLL OF LEAD-FREE  
SOFT SOLDER  
6 FOOT TAPE  
GARDEN HOSE  
PIPE WRENCH  
6
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PREPARATIONS FOR INSTALLATION  
4. Attach a hose to the water heater  
Removing the Old 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.  
FIGURE4.  
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 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, see Figure 5.  
FIGURE1.  
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.  
FIGURE2.  
FIGURE3.  
FIGURE5.  
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.  
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.  
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.  
FIGURE6.  
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TYPICAL INSTALLATION  
GET TO KNOW YOUR WATER HEATER - GAS MODELS  
A Vent Pipe  
B Draft Hood  
C Anode  
J
Drip Leg (Sediment Trap)  
K Inner Door  
Outer door  
S
T
U
V
Flue Baffle(s)  
Thermostat  
Drain Valve  
L
D Hot Water Outlet  
M Union  
Pilot and Main Burner  
E
F
Outlet  
Water Connections  
N Inlet Water Shut-off Valve  
O Cold Water Inlet  
W Flue  
X
Y
Drain Pan  
Thermostat Shield (optional)  
G Gas Supply  
P
Inlet Dip Tube  
H Manual Gas Shut-off Valve  
Q Temperature-Pressure Relief Valve  
R Rating Plate  
I
Ground Joint Union  
*
(T) THERMOSTAT  
*
TO VENT TERMINATION  
ON ROOF  
Y
THERMOSTAT  
(V) PILOT & MAIN BURNER -NATURAL GAS  
SHIELD  
(OPTIONAL)  
(V) PILOT & MAIN BURNER - PROPANE GAS  
MAIN  
BURNER  
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.  
FIGURE7.  
8
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TYPICAL INSTALLATION  
MIXING VALVE USAGE  
FIGURE8.  
This appliance has been design certified as complying with  
HOTTER WATER CAN SCALD:  
American National Standard/CSA Standard for water heaters  
and is considered suitable for:  
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 province 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 plumbing supply or hardware  
stores. See Figure 8. Valves for reducing point of use temperature  
by mixing cold and hot water are also available. Consult Maytag  
Customer Service (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
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LOCATING AND INSTALLING THE NEW WATER HEATER  
•
Water supply shut-off devices that activate based on the  
water pressure differential between the cold water and hot  
water pipes connected to the water heater.  
Facts to Consider About the Location  
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.  
•
Devices that will turn off the gas supply to a gas water heater  
while at the same time shutting off its water supply.  
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 hardware store. 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.  
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 the 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 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.  
•
Sensors mounted in the drain pan that turn off the water  
supply to the entire home when water is detected in the drain  
pan.  
Also, the water heater must be located and/or protected so it  
is not subject to physical damage by a moving vehicle.  
10  
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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.  
FIGURE10.  
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 Energy Policy Act  
standards with respect to insulation and standby loss  
requirements, making an insulation blanket unnecessary.  
FIGURE9.  
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  
11  
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commence within 12 inches (30 cm) of the top and one  
commencing within 12 inches (30 cm) of the bottom of the  
enclosures.  
these instructions can restrict the air flow required for proper  
combustion, potentially resulting in fire, asphyxiation, serious  
personal injury or death.  
•
•
•
•
•
•
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.  
FIGURE11.  
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:  
FIGURE12.  
(See Figures 10 and 11)  
•
•
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.  
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 cm2). One opening shall  
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  
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Water Piping  
FIGURE13.  
HOTTER WATER CAN SCALD:  
•
•
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.  
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 province 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 plumbing supply or hardware  
stores, 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 (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 ducts are used, they shall be of the same cross-  
sectional area as the free area of the openings to which  
they connect. The minimum short side dimension of  
rectangular air ducts shall not be less than 3 inches  
(76.2 mm), see Figure 14.  
FIGURE14.  
•
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.  
FIGURE15.  
•
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.  
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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.  
FIGURE16.  
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 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  
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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:  
• Shall not be smaller in size than the outlet pipe size of the  
valve, or have any reducing couplings or other restrictions.  
For safe operation of the water heater, the relief valve must not  
be removed from its designated opening nor plugged.  
• Shall not be plugged or blocked.  
• Shall be of material listed for hot water distribution.  
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 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  
FIGURE17.  
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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 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/NFPA54.  
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.  
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.  
Periodically check the venting system for signs of obstruction  
or deterioration and replace if needed.  
The combustion and ventilation air flow must not be obstructed.  
•
Check all water piping and connections for leaks. Repair  
as needed.  
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.  
Venting  
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.  
•
•
For proper draft hood attachment, the draft hood legs may  
be angled slightly inward.  
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 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.  
•
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.  
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 1-800-788-  
8899 or the local gas supplier for further information.  
Obstructed or deteriorated vent systems may present serious  
health risk or asphyxiation.  
FIGURE18.  
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.  
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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.  
FIGURE19.  
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.  
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 the 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.  
Failure to have required clearances between vent piping and  
combustible material will result in a fire hazard.  
The minimum inlet gas pressure shown on the rating plate is  
that which will permit firing at the rated input.  
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  
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  
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Standard Models are for installation up to 2,000 feet (610 m)  
above sea level.  
Sediment Traps  
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  
1,000 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.  
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 National Fuel Gas Code ANSI  
Z223.1/NFPA 54.  
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.  
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.  
FIGURE20. GASPIPINGWITHFLEXIBLECONNECTOR.  
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).  
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.  
FIGURE 21. GAS PIPING WITH ALL  
BLACK IRON PIPE TO GAS CONTROL.  
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OPERATING INSTRUCTIONS  
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 PURGEDAT FAUCETS.  
A. This appliance has a pilot which must be lighted by  
hand. When lighting the pilot, follow these instructions  
exactly.  
B. BEFORE LIGHTINGsmell 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 IFYOU SMELL GAS:  
•
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.  
•
•
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.  
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  
TOP VIEW  
FIGURE 1.  
1.  
STOP! Read the safety information above  
on this label.  
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.  
2. Set the thermostat to lowest setting by turning thermostat  
dial fully clockwise until it stops.  
3. Push the gas control knob down slightly and turn  
clockwise to “OFF”, (Figure “A”).  
•
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.  
NOTE:GascontrolknobCANNOTbeturnedfrom“PILOT”  
to “OFF” unless it is pushed down slightly. Do not force.  
4. Remove inner and outer burner doors located below  
and behind the gas control unit.  
•
5. Wait five (5) minutes to clear out any gas. If  
you then smell gas  
safety information  
STOP! Follow “B” in the  
above on this label.  
9. Replace inner and outer burner doors.  
10. At arm’s length away, turn control knob  
If you don’t smell gas, go to next step.  
counterclockwise  
11. Set thermostat to desired setting. (See Figure 1).  
to on. (Figure “C”).  
6. Find pilot. Follow metal tube from the bottom, right of the  
gas control to the pilot burner,  
(Figure “D”).  
CAUTION: Hotter water increases the  
risk of scald injury. Consult the instruction  
manual before changing temperature.  
7. Turn gas control knob counterclockwise to  
(Figure “B”).  
“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”.  
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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 ANDAIR PURGEDAT 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  
•
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.  
•
•
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.  
LIGHTING INSTRUCTIONS  
TOP VIEW  
FIGURE D.  
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.  
1.  
STOP! Read the safety information above on  
this label.  
2. Set the thermostat to the lowest setting by turning  
thermostat dial fully clockwise until it stops.  
3. Push the gas control knob down slightly and turn clockwise  
to "OFF" (Figure A).  
•
If knob does not pop up when released, stop and  
immediately call your service technician or gas  
supplier.  
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 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  
this label. If you do not smell gas, go to  
above on  
9. Replace inner and outer burner doors.  
the next step.  
10. At arm's length away, turn the gas control knob  
6. Find Pilot. Follow metal tube from the bottom , right of the  
gas control to the pilot burner. (Figure D).  
counterclockwise  
to on (Figure C).  
11. Set thermostat to desired setting (Figure 1).  
7. Turn gas control knob counterclockwise  
(Figure B).  
to "PILOT"  
CAUTION: Hotter water increases the risk of  
scald injury. Consult the instruction manual  
before changing temperature.  
8. Push gas control knob down all the way and hold it down.  
Immediately light the pilot with a match. Continue to hold  
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.  
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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.  
Turn the water temperature dial clockwise (  
the temperature, or counterclockwise (  
temperature.  
) to decrease  
) to increase the  
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 plumbing  
supply or hardware stores, see Figure 8 on page 9 and Figure  
15 on page 13. Valves for reducing point of temperature by  
mixing cold and hot water are also available. Consult Maytag  
Customer Service (1-800-788-8899). Follow manufacturer’s  
instructions for installation of the valves. Before changing the  
FIGURE22.  
Temperature  
Settings  
Time to Produce 2nd & 3rd  
Degree Burns on Adult Skin  
VERYHOT=approx.160°F(71°C)  
C = approx. 150°F (66°C)  
B = approx. 140°F (60°C)  
A = approx. 130°F (54°C)  
= approx. 120°F (49°C)  
About 1/2 second  
About 1-1/2 seconds  
Less than 5 seconds  
About 30 seconds  
More than 5 minutes  
- - - - - - - - - - - - - - - -  
LOW = approx. 80°F (27°C)  
FIGURE23.  
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SERVICE AND MAINTENANCE  
Tank (Sediment) Cleaning  
Burner Inspection  
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!  
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.  
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  
PROPANE  
FIGURE24.  
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.  
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.  
Burner Cleaning  
If inspection of the burner shows that cleaning is required, turn  
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.  
the gas control knob clockwise (  
depressing slightly.  
) to the “OFF” position,  
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  
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.  
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.  
22  
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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 SUITABLEAREA: 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.  
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.  
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.  
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.  
Temperature-Pressure Relief Valve Operation  
•
•
Turn the gas control knob to the “OFF” position.  
The temperature-pressure relief valve must be manually  
operated at least once a year.  
CLOSE the cold water inlet valve to the water heater.  
23  
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•
•
•
OPEN a nearby hot water faucet and leave open to allow for  
draining.  
•
Screw the handle and cap assembly back into the drain  
valve and retighten using a wrench. DO NOT OVER  
TIGHTEN.  
Connect a hose to the drain valve and terminate to an  
adequate drain.  
•
•
•
Follow instructions in the Filling The Water Heater section.  
Check for leaks.  
OPEN the water heater drain valve to allow for tank draining.  
Follow the lighting instructions in the Lighting section to  
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.  
restart the water heater.  
•
•
•
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.  
Drain Valve Washer Replacement  
FIGURE 26.  
(for selected models with plastic drain valves)  
(See Figure 26)  
Service  
NOTE: For ordering replacement washers, refer to the  
“Repair Parts List” section of this manual.  
Before calling for repair service, read the Start Up Conditions  
and Operational Conditions found in the Troubleshooting Guide  
of this manual.  
•
•
•
Turn “OFF” gas supply to water heater.  
Follow “Draining” instructions.  
If a condition persists or you are uncertain about the operation  
of the water heater, let the Maytag Customer Service Center  
check it out.  
Turning counter clockwise (  
the screw handle.  
), remove the hex cap below  
Call the Maytag Customer Service at 1-800-788-8899 for an  
authorized servicer.  
•
Remove the washer and put the new one in place.  
TROUBLESHOOTING  
•
Large amounts of hot water are used in a short time and  
the refill water in the tank is very cold.  
Start Up Conditions  
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:  
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.  
•
•
A new water heater is filled with cold water for the first time.  
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.  
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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.  
little or no dissolved oxygen in the water.  
a sulfate reducing bacteria within the water heater. (This  
harmless bacteria is non-toxic to humans.)  
Thermal Expansion  
•
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  
Smelly Water  
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  
In each water heater there is installed at least one anode rod  
(see parts section) for corrosion protection of the tank. Certain  
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“OFF” the entire gas supply to the water heater. Call Maytag  
Customer Service at 1-800-788-8899 for an authorized  
servicer.  
and drip onto the burner or run on the floor. This is common  
at the time of start-up after installation and when incoming  
water is cold.  
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 H
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  
FIGURE28.  
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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  
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.  
Tighten threaded connections.  
WATER LEAKS  
Inspect other appliances near water heater.  
Refer to CONDENSATION.  
Thermal expansion in closed water system.  
Improperly seated valve.  
Install thermal expansion tank (DO NOT plug T&P valve).  
Check relief valve for proper operation  
(DO NOT plug T&P valve).  
LEAKING T&P VALVE  
SMELLY WATER  
High sulfate or mineral content in water supply.  
Drain and flush heater thoroughly, then refill.  
Bacteria in water supply.  
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.  
Gas control knob not positioned correctly.  
Main gas supply off.  
PILOT WILL NOT LIGHT  
Thermocouple malfunction.  
Match not close to pilot.  
Thermocouple malfunction.  
Replace pilot assembly  
BURNER WILL NOT  
STAY LIT  
and/or thermocouple.  
Defective Gas Control.  
Replace Gas Control.  
Dirty pilot burner.  
Clean pilot assembly.  
Thermocouple tip is not in contact with pilot flame.  
Thermocouple malfunction.  
Defective Gas Control.  
Insert thermocouple correctly.  
PILOT OUTAGE  
Replace pilot assembly and/or thermocouple.  
Replace Gas Control.  
Heater not lit or thermostat not on.  
Thermostat set too low.  
Refer to LIGHTING INSTRUCTIONS.  
Refer toTEMPERATURE REGULATION.  
Reduce hot water use.  
Heater undersized.  
NOT ENOUGH  
HOT WATER  
Low gas pressure.  
Contact your gas supplier.  
Incoming water is unusually cold.  
Leaking hot water pipes or fixtures.  
High temperature limit switch activated.  
Allow more time for heater to re-heat.  
Have plumber check and repair leaks.  
Contact a Maytag Customer Service Agent to  
determine cause.  
WATER TOO HOT  
Thermostat set too high.  
Refer toTEMPERATURE REGULATION.  
Refer to CONDENSATION.  
WATER HEATER SOUNDS  
Condensation dripping on burner.  
Sediment or calcium in bottom of heater tank.  
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.  
SIZZLING - RUMBLING  
SOOTING  
Improper combustion.  
Lack of supply air.  
Improperly installed vent piping.  
Downdraft.  
Contact a Maytag Customer Service Agent to determine  
cause.  
VENT GAS ODORS  
Poor combustion.  
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REPAIR PARTS LIST  
MAYTAG GAS WATER HEATERS  
MODEL NO’S  
HRN4975S 75 Gallon Natural Gas  
HRP4975S  
75 Gallon Propane Gas  
BURNERASSEMBLY  
PROPANE BURNERASSEMBLY  
18  
2
4
Maytag/State Part  
Number Conversion Key  
3
21  
17  
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  
66001853  
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  
196302-001  
Key  
No. Part Description  
Model Number  
HRN4975S  
66001109  
66001359  
HRP4975S  
66001109  
66001834  
1
2
Anode Rod  
Burner Head  
3
4
Burner Orifice - Std.  
Burner Tube  
66001689 (#21) 66001841 (#38)  
66001690  
66001837  
66001683  
66001678  
66001679  
66001015  
66001021  
66001677  
66001680  
66001692  
66001853  
66001684  
66001190  
66001691  
66001845  
66001682  
66001667  
66001843  
66001846  
66001837  
66001683  
66001678  
66001679  
66001015  
66001021  
66001849  
66001773  
66001692  
66001853  
66001684  
66001190  
66001848  
66001845  
66001682  
66001667  
66001847  
*5  
6
Compression Fitting  
DipTube  
7
Draft Hood  
*8  
9
Draft Hood Bracket  
Drain Valve  
10  
11  
12  
13  
Drain Valve Washer  
Flue Baffle  
Gas Control Valve  
Inner Door  
*14 Instruction Manual  
15  
16  
17  
18  
19  
20  
21  
Nipple (Hot Outlet)  
Outer Door  
Pilot Ass’y - Std. w/Compression Fitting  
Pilot Tube  
T & P ReliefValve  
Thermostat Shield (Optional)  
Thermocouple  
* Not Shown.  
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.  
The model number of this gas water heater will be found on the  
model rating plate located near the gas control valve.  
When ordering repair parts, always give the following information:  
•
•
Part Description  
Part Number  
•
•
Model number  
Serial Number  
THIS ISAREPAIR PARTS LIST, NOTA PACKING LIST.  
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NOTES  
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NOTES  
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NOTES  
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WARRANTY  
FULLONEYEAR 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 ninth 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 WARRANTYAGAINST LEAKS  
After the first year and through the ninth 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 WARRANTYSERVICE  
To locate an authorized service company in your area contact the Maytag dealer from whom your appliance  
was purchased; or call 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 ISATRADEMARK OF THE MAYTAG CORPORATIONAND IS  
USED UNDER LICENSE TO STATE INDUSTRIES, INC.  
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