NLYFAG
GAS WATER HEATER
USER'S o,...GUIDE
For Your
a,eLy Model Numbers
AN ODORANT IS ADDED TO THE GAS USED BY THIS HJ630NORT HJ630PORT
WATER HEATER HJ630NORT2 HJ630PORT2
HJ640NORT HJ640PORT
WARNING: If the information in these instructions are not fol- HJ640NORT2 HJ640PORT2
lowed exactly, a fire or explosion may result, causing property HJ640NORS HJ640PORSHJ640NORS2 HJ640PORS2
damage, persona injury or death. HJ640NBRS HJ640PBRS
HJ640NOLS HJ640POLS
-Do not store or use gasoline or other flammable vapors and liq- HJ640NBRT HJ640PBRT
uids in the vicinity of this or any other appliance. HJ640NBRTF HJ640PBRTF
HJ640NBRT2 HJ640PBRT2
-WHAT TO DO IF YOU SMELL GAS HJ640NOCT42W HJ640POCT42W
• Do not try to light any appliance. HJ640NOCT52W HJ640POCT52W
• Do not touch any electrical switch; do not use any phone in HJ650NKRT HJ650PKRT
your building. HJ650NBRT HJ650PBRT
HJ650NBRT2 HJ650PBRT2
• Immediatelycallyour gassupplierfrom a neighbor'sphone. HJ650NRRT HJ650PRRT
Follow the gas supplier's instructions. HJ650NRRTF HJ650PRRTF
• If you cannot reach your gas supplier, call the fire department. HJ650NRRT2 HJ650PRRT2
HJ650NOCT32W HJ650POCT32W
-Installation and service must be performed by a qualified installer, HJ650NBRS2 HJ650PBRS2
service agency or the gas supplier. HJ665NRRT5 HJ665PRRT5
H675NRRS H675PRRS
H675NRRT H675PRRT
_,WARNING
Improper installation, adjustment, alteration, service or mainte- FOR POTABLE WATER
nance can cause DEATH, SERIOUS BODILY INJURY, OR PROPERTY HEATING ONLY
DAMAGE. Refer to this manual for assistance or consult the local NOT SUITABLE FOR
gas utility for further information. SPACE HEATING
AWARNING NOT FOR USE IN
Flammable vapors may be drawn by air currents from other MANUFACTURED
areas of the structure to this appliance. (MOBILE) HOMES
Caution:
•,WARNING Read and Follow All
READ THE GENERAL SAFETY SECTION BEGINNING ON INSIDE Safety Rules and
COVER AND THEN THIS ENTIRE MANUAL BEFORE INSTALLING
Operating Instructions
OR OPERATING THIS WATER HEATER. Before First Use of
Save this Manual for Future Reference. This Product.
Safety Instructions
•,WARNING AWARNING
Improper installation, adjustment, alteration, service At the time of manufacture this water heater was pro-
or maintenance can cause DEATH, SERIOUS BODILY vided with a combination temperature-pressures relief
INJURY,OR PROPERTYDAMAGE. Refer to this manu- valve certified by a nationally recognized testing labo-
al for assistance consult your local gas utility or call ratory that maintains periodic inspection of production
Maytag Customer Service at %800-788-8899 for an of listed equipment or materials, as meeting the
authorized servicer for further information, requirements for Relief Valves and Automatic Gas
Shutoff Devicesfor Hot Water Supply Systems,and the
current edition of ANSI Z21.22 and the code require-
ments of ASME. If replaced, the valve must meet the
•,WARNING requirements of local codes, but not less than a combi-
WATER HEATERS EQUIPPED FOR ONE TYPE GAS nation temperature and pressure relief valve certified as
ONLY: This water heater is equipped for one type meeting the requirements for Relief Valves and
gas only. Check the model rating plate near the gas Automatic Gas Shutoff Devices for Hot Water Supply
control valve for the correct gas. DO NOT USE THIS Systems,ANSI Z21.22 by a nationally recognized testing
WATER HEATER WITH ANY GAS OTHER THAN THE laboratory that maintains periodicinspection of produc-
ONE SHOWN ON THE MODEL RATING PLATE.Failure tion of listed equipment or materials.
to use the correct gas can cause problems which can The valve must be marked with a maximum set pres-
result in DEATH, SERIOUS BODILY INJURY, OR PROP- sure not to exceed the marked hydrostatic working
ERTY DAMAGE. If you have any questions or doubts pressure of the water heater (150 Ibs./sq. in.) and a dis-
consult your gas supplier or local utility, charge capacity not lessthan the water heater input
rate as shown on the model rating plate. (Electric
heaters - watts divided by 1000 x 3415 equal BTU/Hr.
rate.)
_WARNING Your local jurisdictional authority, while mandating the
INSTALLATIONS IN AREAS WHERE FLAMMABLE LIQ- use of a temperature-pressure relief valve complying
UIDS (VAPORS)ARELIKELYTO BEPRESENTOR STORED with ANSIZ21.22 and ASME, may require a valve model
different from the one furnished with the water heater.
(GARAGES, STORAGE, AND UTILITY AREAS, ETC):
Flammable liquids (such as gasoline, solvents, propane Compliance with such local requirements must be satis-
(LP) or butane, etc.J, all of which emit flammable lied by the installer or end user of the water heater
vapors, may be improperly stored or used in such with a locally prescribed temperature-pressure relief
areas. The gas water heater pilot light or main burner valve installed in the designated opening in the water
can ignite suchvapors. The resulting flashback and fire heater in place of the factory furnished valve.
can cause death or serious burns to anyone in the For safe operation of the water heater, the relief valve
area, aswell as property damage, must not be removed from it's designated opening or
If installation in such areas is your only option, then plugged.
the installation must be accomplished in a way that The temperature-pressure relief valve must be installed
the pilot flame and main burner flame are elevated directly into the fitting of the water heater designated
from the floor at least 18 inches.While this may reduce for the relief valve. Position the valve downward and
the chances of flammable vapors from a floor spill provide tubing so that any discharge will exit only
being ignited, gasoline and other flammable sub- within 6 inches above, or at any distance below the
stances should never be stored or used in the same structural floor. Becertain that no contact is made with
room or area containing a gas water heater or other any live electrical part. The discharge opening must not
open flame or spark producing appliance, be blocked or reduced in size under any circumstances.
NOTE: Flammable vapors may be drawn by air currents Excessivelength, over 30 feet, or useof more than four
from other areas of the structure to the appliance, elbows can cause restriction and reduce the discharge
capacity of the valve.
No valve or other obstruction isto be placed between
the relief valve and the tank. Do not connect tubing i
AWARNING directly to discharge drain unless a 6' air gap is provid-
If this water heater will be used in beauty shops, ed. To prevent bodily injury, hazard to life, or property
barber shops, cleaning establishments, or self-sero damage, the relief valve must be allowed to discharge
vice laundries with dry cleaning equipment, it is water in quantities should circumstancesdemand. If the
imperative that the water heater or water heaters dischargepipe is not connected to a drain or other suit-
be installed so that combustion and ventilation air able means, the water flow may cause property dam-
be taken from outside these areas. Refer to the age.
"Locating The New Water Heater" section of this T e DischargePipe:
manual and also the current edition of the National • Must notbe smaller in size than the outlet pipe size
Fuel Gas Code, ANSI Z223.1, also referred to as NFPA of the valve, or have any reducing couplings or other
54 for specifics provided concerning air required, restrictions.
Must not be plugc_edor blocked.
Must be of material listedfor hot water distribution.
, • Must be installed so as to allow complete drainage of
_,WARNING
I
both the temperature-pressure relief valve, and the
A fire can start if combustible materials such as dischargepipe.
clothing, cleaning materials, or flammable liquids • Must terminate at an adequate drain.
are paced aga nst or next to the water heater. • Must not have any valve between the relief valve and
tank.
2
Safety Instructions
_I_WARNING _WARNING
A gas water heater cannot operate properly without This water heater must not be installed directly on
the correct amount of air for combustion. Do not carpeting. Carpeting must be protected by a metal
install in a confined area such a closet, unless you or wood panel beneath the appliance extending
provide air as shown in the "Locating The New beyond the full width and depth of the appliance by
Water Heater" section. Never obstruct the flow of at least 3 inches (76.2mm) in any direction, or if the
ventilation air. If you have any doubts or questions appliance is installed in an alcove or closet, the
at all, call your gas company. Failure to provide the entire floor must be covered by the panel. Failure to
proper amount of combustion air can result in a fire heed this warning may result in a fire hazard.
or explosion and can cause DEATH, SERIOUS BODILY
INJURY,OR PROPERTYDAMAGE.
AWARNING
AWARNING VENT DAMPERS - Any vent damper, whether it is
HOTTER WATER CAN SCALD: Water heaters are operated thermally or otherwise must be removed if
intended to produce hot water. Water heated to a its use inhibits proper drafting of the water heater.
temperature which will satisfy clothes washing, dish Thermally Operated Vent Dampers: Gas-fired water
washing, and other sanitizing needs can scald and heaters having thermal efficiency in excess of 80%
may produce a relatively low flue gas temperature.
permanently injure ,you upon contact. Some people
are more likely to be permanently injured by hot Such temperatures may not be high enough to prop-
water than others. These include the elderly, children, erly open thermally operated vent dampers. This
the infirm, or physically/mentally handicapped. If would cause spillage of flue gases and may cause
anyone using hot water in your home fits into one of carbon monoxide poisoning.
these c_roupsor if there is a local code or state law Vent dampers must bear evidence of certification as
requiring a certain temperature water at the hot complying with the current edition of American
water tap, then you must take special precautions. In National Standard ANSI Z21.68 (ANSI Z21.66 & 67,
addition to using the lowest possible temperature respectively, cover electrically and mechanically actu-
setting that satisfies your hot water needs, a means ated vent dampers). Before installation of any vent
such as a mixing valve, should be used at the hot damper, consult your local gas utility for further
water taps used by these people or at the water information.
heater. Mixing valves are available at plumbing sup-
ply or hardware stores. Follow manufacturers instruc-
tions for installation of the valves. Before changing
the factory setting on the thermostat, read the
"Temperature Regulation" section in this manual. AWARNING
• The appliance and its individual shutoff valve must
be disconnected from the gas supply piping system
during any pressure testing of the gas system at
_WARNING test pressures in excess ofl/2 pound per square
inch (3.5kPa).
Soot build-up indicates a problem that requires cor- • The appliance must be isolated from the gas sup-
rection before further use, Turn "off" gas to water ply piping system by closing its individual manual
heater and leave "off" until repairs are made, shutoff valve during any pressure testing of the
because failure to correct the cause of the sooting gas supply piping system at test pressures equal or
can result in a fire or explosion causing DEATH, SERI- lessthan 1/2pound per square inch (3.5kPa).
OUS BODILY INJURY, OR PROPERTYDAMAGE.
AWARNING AWARNING
BEFORE LIGHTING [PROPANE (L.P.) GAS WATER Chemical vapor corrosion of the flue and vent sys-
HEATERS]: Propane (L.P.) gas is heavier than air. tem may occur if air for combustion contains certain
Should there be a leak in the system, the gas will set- chemical vapors. Spray can propellants, cleaning sol-
tie near the ground. Basements, crawl spaces, skirted vents, refrigerator and air conditioner refrigerants,
areas under manufactured (mobile) homes (even swimming pool chemicals, calcium and sodium chlo-
when ventilated), closets and areas below ground ride, waxes, bleach, and process chemicals are typi-
level will serve as pockets for the accumulation of cal compounds which are potentially corrosive.
this gas. Before attempting to light or relight the
water heater's pilot or turning on a nearby electrical
ight switch, be absolutely sure there is no accumu-
ated gas in the area. Search for odor of gas by sniff- 1
ng at ground level in the vicinity of the appliance. If AWARNING
l
_dor is detected, follow steps indicated at "For Your Obstructed or deteriorated vent systems may pre-
Safety" on the cover page of this manual then leave sent a serious health risk or asphyxiation.
the premises.
Safety Instructions continued on page 4.
3
Safety Instructions
A, WARNING &WARNING
The water heater with draft hood installed must be INSULATING JACKETS: When installing an external
properly vented to a chimney which terminates out- water heater insulation jacket on a gas water heater:
doors. Never operate the water heater unless it is • DO NOT cover the temperature-pressure relief valve.
vented to the outdoors and has adequate air supply • DO NOT put insulation over any part of the top of
to avoid risks of improper operation, explosion or the gas water heater.
asphyxiation. • DO NOT put insulation over the gas control valve or
gas control valve/burner cover, or any accessareas
to the burner.
• DO NOT let insulation around the gas water heater
=tWARNING to get within 8 inches of the floor (accessfor servic-
Minimum clearances between the water heater and ing the burner).
combustible construction are 1" at the sides and rear, • DO NOT cover or remove operating instructions,
4" at the front, and 6" from the vent pipe. Clearance and safety related warning labels and materials
from the top of the jacket is 18" on most models, affixed to the water heater.
Note that a lesser dimension may be allowed on Failure to heed this will result in the possibility of a
some models. Refer to the label on the water heater fire or explosion.
adjacent to the gas control valve for all clearances.
,& WARNING A CAUTION
WATER HEATERS EVENTUALLY LEAK: Installation of
Flood damage to a water heater may not be readily the water heater must be accomplished in such a
visible or immediately detectible. However, over a manner that if the tank or any connections should
period of time a flooded water heater will create leak, the flow of water will not cause damage to
dangerous conditions which can cause DEATH, SERI- the structure. For this reason, it is not advisable to
OUS BODILY INJURY, OR PROPERTY DAMAGE. install the water heater in an attic or upper floor.
Contact the Maytag dealer from whom the appli- When such locations cannot be avoided, a suitable
ance was purchased or call Maytag Customer Service drain pan should be installed under the water
at 1-800-788-8899 for an authorized servicer to heater. Drain pans are available at your local hard-
replace a flooded water heater. Do not attempt to
ware store. Such a drain pan must be not greater
repair the unit! It must be replaced! than 1_½inches deep, have a minimum length and
width of at least 2 inches greater than the water
heater dimensions and must be piped to an ade-
quate drain. The pan must not restrict combustion
AWARNING air flow. Under no circumstances is the manufactur-
er to be held liable for any water damage in con-
HYDROGEN GAS: Hydrogen gas can be produced in
a hot water system that has not been used for a nection with this water heater.
long period of time (generally two weeks or more).
Hydrogen gas isextremely flammable and explosive.
To prevent the possibility of injury under these con-
ditions, we recommend the hot water faucet be
opened for several minutes at the kitchen sink
before any electrical appliances which are connected
to the hot water system are used (such as a dish-
washer or washing machine). If hydrogen gas is pre-
sent, there will probably be an unusual sound simi-
lar 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.
4
Table of Contents
Safety Instructions ................................................................................................................................... 2-4
Table of Contents ..................................................................................................................................5
Customer Information ...............................................................................................6
Product Specifications .....................................................................................................................7-9
Accessories and Tools Needed ................................................................................................10
Accessories ....................................................................................................................................................................... 10
Tools ............................................................................................................................................................................ 10
Instructions for Installation .............................................................................................11-21
Removing the Old Water Heater. .................................................................................................................................... .11
Typical Installation ............................................................................................................................................................ 12
Locating the New Water Heater .................................................................................................................................. 13,14
Combustion Air and Ventilation for Appliances in Unconfined Spaces ............................................................................. 14
Combustion Air and Ventilation for Appliances in Confined Spaces ............................................................................ 14,15
Water Piping .................................................................................................................................................................... 16
Temperature-Pressure Relief Valve .................................................................................................................................... 17
Filling the Water Heater ................................................................................................................................................. 18
Venting. .................................................................................................................................................................... 18,19
Gas Piping ................................................................................................................................................................ 19,20
Installation Checklist ........................................................................................................................................................ .21
Temperature Regulation. ................................................................................................................................................ .24
Service and Maintenance ..........................................................................................................25-27
Venting System Inspection. ............................................................................................................................................ 25
Burner Inspection ......................................................................................................................................................... .25
L.R Gas Control Valve and Burner Assembly Replacement Information ......................................................................... .26
Burner Cleaning ......................................................................................................................................................... 26
Draining ......................................................................................................................................................................... .26
Anode Rod Inspection .................................................................................................................................................. .27
Temperature-Pressure Relief Valve Operation ................................................................................................................. 27
Drain Valve Washer Replacement ............................................................................................................................... 27
Housekeeping ........................................................................................................................................................... .27
Service .............................................................................................................................................................................. 27
Condensation .............................................................................................................................................................. 28
Smoke/Odor ............................................................................................................................................................ 28
Thermal Expansion .................................................................................................................................................... .28
Strange Sounds. ........................................................................................................................................................ .28
Operational Conditions ............................................................................................................................................. .29,30
Smelly Water ................................................................................................................................................................ 29
Air in Hot Water Faucets ........................................................................................................................................... .29
High Temperature Shut Off System ........................................................................................................................ .29
Not Enough Hot Water ............................................................................................................................................ .29
Water is too Hot ................................................................................................................................................... .30
Leakage Checkpoints ................................................................................................................................................... 31
Repair Parts List ...................................................................................................................................... 32-49
Warranty ...................................................................................................................................................................52
5
Customer Information
Thank Youfo_purchasing a Maytag water heater. • The installation must conform with the instructions in this
Properly installed and maintained, it should give you years of manual; gas company rules; and Local Codes, or in the
trouble free service. It is strongly suggested that this new water absence of Local Codes, with the current edition of the
heater be professionally installed, contact Maytag Customer National Fuel Gas code, ANSI Z223.1, also referred to as
Service (1-800-788-8899) for recommended installers. NFPA 54. This publication is available from your local
government or public library or gas company or by writing
Abbreviations Found In This Instruction Manual NFPA, Batterymarch Park, Quincy, MA 02269.
CSA - Canadian Standards Association • After reading this manual you have any questions or do not
ANSI - American National Standards Institute understand any portion of the instructions, call Maytag
NFPA - National Fire Protection Association Customer Service at 1-800-788-8899 for an authorized
services.
AWARNING • Carefully plan the place where you are going to put the
water heater. Correct combustion, vent action, and vent
This gas-fired water heater is design certified by
CSA INTERNATIONAL under American National pipe installation areveryimportant in preventing death
Standard/CSA Standard for Gas Water Heaters ANS from possible carbon monoxide poisoning and fires.
Z21.10.1 • CSA 4.1 (current edition). The installation Examine the location to ensure the water heater compiles
must conform with this manual, Local Codes and
with the current edition of the National Fuel Gas with the "Locating the New Water Heater" section in this
Code, ANSI Z223.1. manual.
This publication is available from your local govern- • For California installatlon this water heater must be braced,
ment or public library, gas company, or by writing anchored, or strapped to avoid falling or moving during an
NFPA, Batterymarch Park, Quincy, MA 02269.
earthquake. See instructions for correct installation proce-
• Read the "Safety Instructions" section, pages 2, 3 and 4 of dures. Instructions may be obtained from your local dealer,
this manual first and then the entire manual carefully. If wholesaler, public utilities or California Office of the State
Architect, 400 P Street, Sacramento, CA 95814.
you don't follow the safety rules, the water heater will not
operate properly. It could cause DEATH, SERIOUS • Massachusetts Code requires this water heater to be
installed in accordance with Massachusetts 248-CMR 2.00:
BODILY INJURY AND/OR PROPERTY DAMAGE.
• This manual contains instructions for the installation, State Plumbing Code and 248-CMR 5.00.
operation, and maintenance of the gas-fired water heater. • Complies with SCAQMD rule #1121and districts havlng
It also contains warnings through out the manual that you equivalent NOx requirements.
must read and be aware of. All warnings and all instruc-
tions 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 OPER-
ATE THE WATER HEATER.
6
Product Specifications
*Model HJ630NORT HJ630PORT HJ630NORT2 HJ630PORT2 HJ640NORT HJ640PORT
Tank Capacity
In Gallons 30 30 30 30 40 40
Type of
Gas Natural Propane Natural Propane Natural Propane
B.T.U.
Rate 33_500 331500 33_500 33,500 38_000 35,500
Recovery Rate
In Gals Per Hour
@ 90°F Rise 34 34 34 34 39 36
Minimum
Vent Pipe 3" 3" 3" 3" 3" 3"
Diameter 16" 16" 18" 18" 18" 18"
Height To
Top of
Draft Hood 59V2" 59%" 59V2" 591/2" 60" 60"
*Model HJ640NORT2 HJ640PORT2 HJ640NORS HJ640PORS HJ640NORS2 HJ640PORS2
Tank Capacity
In Gallons 40 40 40 40 40 40
Type of
Gas Natural Propane Natural Propane Natural Propane
B.T.U.
Rate 38_000 35,500 351000 351000 35_000 35_000
Recovery Rate
In Gals Per Hour
@ 90°F Rise 39 36 36 36 36 36
Minimum
Vent Pipe 3" 3" 3" or 4" 3" or 4" 3" or 4" 3" or 4"
Diameter 20" 20" 20" 20" 22" 22"
Height To
Top of
Draft Hood 60" 60" 52" 52" 52" 52"
*Model HJ640NBRS HJ640PBRS HJ640NOLS HJ640POLS HJ640NBRT HJ640PBRT
HJ640NBRTF HJ640PBRTF
Tank Capacity
In Gallons 40 40 39 39 40 40
Type of
Gas Natural Propane Natural Propane Natural Propane
B.T.U.
Rate 40,000 40,000 33_000 33_000 40_000 40,000
Recovery Rate
In Gals Per Hour
@ 900F Rise 41 41 34 34 41 41
MinLmum
Vent Pipe 3" or 4" 3" or 4" 3" or 4" 3" or 4" 3" or 4" 3" or 4"
Diameter 20" 20" 24" 24" 18" 18"
Height To
Top of
Draft Hood 52" 52" 40" 40" 62V2" 62'/2"
Adding suffLx"D" denotes high altitude (Example HJ630NORTD). High altitude models have a B.T.U./Recovery Rate 10% iess
than shown. 7
Product Specifications (cont'd)
*Model HJ640NBRT2 HJ640PBRT2 HJ640NOCT42W HJ640POCT42W HJ640NOCT52W HJ640POCT52W
Tank Capacity
In Gallons 40 40 40 40 40 40
Typeof
Gas Natural Propane Natural Propane Natural Propane
B.T.U.
Rate 401000 407000 40_000 401000 351000 351000
Recovery Rate
In Gals Per Hour
@ 90*FRise 41 41 41 41 36 36
Minimum
Vent Pipe 3" or4" 3"or 4" 3" or 4" 3" or 4" 3" or 4" Y' or 4"
Diameter 20" 20" 20" 20" 20" 20"
Height To
Topof
Draft Hood 62%" 62V2" 62V2" 62Vf' 65" 65"
*Model HJ650NKRT HJ650PKRT HJ650NBRT HJ650PBRT HJ650NBRT2 HJ650PBRT2
Tank Capacity
In Gallons 50 50 50 50 50 50
Type of
Gas Natural Propane Natural Propane Natural Propane
B.T.U.
Rate 36,000 361000 40_000 40_000 40r000 40_000
Recovery Rate
In Gals Per Hour
@ 90°F Rise 36 36 41 41 41 41
Minimum
Vent Pipe 3" 3" 3" or 4" 3" or 4" 3" or 4" 3" or 4"
Diameter 20" 20" 20" 20" 22" 22"
Height To
Top of
Draft Hood 60" 60" 63" 63" 63" 63"
'Model HJ650NRRT HJ650PRRT HJ650NRRT2 HJ650PRRT2 HJ650NOCT32W HJ650POCT32W
HI650NRRTF H|650PRRTF
Tank Capacity
In Gallons 50 50 50 50 50 50
Type of
Gas Natural Propane Natural Propane Natural Propane
B.T.U.
Rate 52,500 527500 52,500 521500 361000 36_000
Recovery Rate
In Gals PerHour
@90*FRise 54 54 54 54 38 38
Minimum
VentPipe 4" 4" 4" 4" 3" 3"
Diameter 20" 20" 22" 22" 22" 22"
Height To
Topof
Draft Hood 62W" 62%" 62V2" 62V2" 60_ 60"
Adding suffix "D" denotes high altitude (Example HJ630NORTD). High altitude models have a B.T,U./Recovery Rate 10%less
than shown.
8
Product Specifications (cont'd)
*Model HJ65ONBRS2 HJ65OPBRS2 HJ665NRRT5 HJ665PRRT5 H675NRRS H675PRRS
Tank Capacity
In Gallons 50 50 65 65 73 73
Typeof
Gas Natural Propane Natural Propane Natural Propane
B.T.U.
Rate 401000 401000 651000 551000 751000 551000
Recovery Rate
In Gals Per Hour
@90°F Rise 41 41 66 56 77 56
Minimum
Vent Pipe 3" or 4" 3" or 4" 4" 4" 4" 4"
Diameter 24" 24" 22" 22" 24" 24"
Height To
Topof
Draft Hood 53%" 53%" 63%" 63%" 631/2" 62%"
*Model H675NRRT H675PRRT
Tank Capacity
In Gallons 75 75
Type of
Gas Natural Propane
B.T.u.
Rate 75_100 75_100
Recovery Rate
In Gals Per Hour
@90*FRise 79 79
Minimum
Vent Pipe 4" 4"
Diameter 26V4" 26%"
Height To
Topof
Draft Hood 671/2'' 67%"
Adding suffix "D" denotes high altitude (Example
HJ630NORTD). High altitude models have a
B.T.U./Recovery Rate 10%less than shown.
9
Accessoriesand ToolsNeeded
Accessories
To simplify the installation Maytag has available the installa-
tion 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 autho-
rized installer.
DRAIN PANSAVAILABLEIN 22" DIAMETER
(PARTNUMBER66001011) FORWATER
HEATERSHAVINGA DIAMETER20" OR LESS,
24" DIAMETER(PARTNUMBER66001105) FOR
EXPANSIONTANKSFORTHERMALEXPANSION WATERHEATERSHAVINGA DIAMETERZZ_
CONDITIONSAVAILABLEIN Z GALLON(PART ORLESSAND 2r DIAMETER(PARTNUMBER
NUMBER66001013) AND 5 GALLON(PART 66001012) FORWATERHEATERSHAVINGA
NUMBER66001014) CAPACITY DIAMETER26" ORLESS
Tools
You may or may not need all of these tools, depending on your ADDITIONAL TOOLS NEEDED
type of installation. These tools can be purchased at your local WHEN SWEAT SOLDERING
• Tubing Cutters or Hacksaw
hardware store. • Propane Torch
• Pipe Wrenches (2) 14" • Soft Solder
• Screwdriver _ _ _t • Solder Flux
• Emery Cloth
• Tin Snips _ • Wire Brushes
• 6 Foot Tape of Folding Rule
• Garden Hose GARDENHOSE
• Drill
• Pipe dope or Teflon Tape
HACKSAW
P,PE6 FOOTTAPE WRENCH
ROLLOFTEFLONTAPE 3/4" WIREBRUSH
(USEONLYON WATER
CONNECTIONS)
1/2" WIREBRUSH
_ PROPANETORCH
_SLOT-HEAD SCREWDRIVER
TIN SNIPS
PHILLIPSSCREWDRIVER ROLLOFLEADFREE
SOFTSOLDER
PIPEDOPE(SQUEEZETUBE)
(USEFORWATERAND ROLLOFEMERY
GASCONNECTIONS) CLOTH SOLDERFLUX TUBINGCUTTER
10
Instructions for Installation
Removing the Old Water Heater
Turn "OFF" the gas supply to the water heater. @ Disconnect the vent pipe from the draft hood where they
connect to the water heater. In most installations the vent
AWARNING ] pipe can be rifted off after any screw or other attached
If the maingasline shutoffservingall gasappliancesisusefl,[ devicesareremoved. Dispose of the draft hood. The new
alsoshut "off" the gasat eachappliance.Leaveall gas appli-/ water heaterhasthe draft hood which must be usedfor
ancesshut"off" unti/the waterheaterinstallationiscomplete. J proper operation.
a. 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 con
nect to the water heater. This will
@ @ avoid cutting offthe pipes too short.
@ @ Additional cuts can be made later if
necessary. Disconnect the temperature-
pressure relief valve drain line. When
Turn "OFF" the water to the water the water heater is drained, disconnect
the hose from the drain valve. Close
heater. Some installations require that the drain valve. The water heater is
the water be turned offto the entire now completely disconnected and
house. @ ready to be removed.
Check again to make sure the gas sup-
ply is "OFF" to the water heater. Then @ h. If you have galvanized pipe to the water
disconnect the gas supply connection heater, loosen the two galvanized pipes
from the gas control valve, with a pipe wrench at the union in each
line. Also disconnect the piping
Attach a hose to the water heater drain remaining to the water heater. Thesepieces should be saved since they may
valve and put the other end in a floor be needed when reconnecting the new
drain or outdoors. Open the water water heater. Disconnect the tempera-
heater drain valve. Open a nearby hot ture-pressure relief valve drain line.
water faucet which will relieve pressure When the water heater is drained, dis-
in the water heater and speed draining, connect the hose from the drain valve.
Close the drain valve. The water heater
:;2Z2°tTr122 'vd2c°nnectedand
I "WARN'"G 1 f ACAO"O" 1
Thewater passingout_ maybe extremelyhot.I [ Mineralbuildupor sedimentmay haveaccumulatedin the old[
Toavoidbeingscalded,makesureall connectionsare tight and/ ] water heater.Thiscausesthe water heaterto be muchheavier|
thatthe water flowisdirectedawayfromanyperson, j [than normalandthisresidue,if spilledout,couldcausestaining.J
11
Instructions for Installation (cont'd)
Typical Installation
CHECKALL CONNECTIONS FORLEAKS.CONSULTTHE LOCALUTILITY COMPANY TO EXAMINE iNSTALLATION FORPRO-
PRIETYAND SAFETY.
VACUUMRELIEFREQUIREDBYSOMECODES
_ (REFERTOLOCALCODES)HOTWATEROUTLET
_ COLD WATER iNLET
_TO CHIMNEY
WATTEEN_PEREDET_ R_
*MIXINGVALVE
GAS
SUPPLY , _ TEMPERATURE-PRESSURE
RELIEFVALVE
DISCHARGEPIPE
(Donotcaporplug)
/ / ,-DRAINVALVE
DRAINPAN _ _ TOSUITABLEDRAIN
This appliance has been design certified as complying with American National Standard/CSA Standard for water heaters and is con-
sideredsuitable for:
Water (Potable) Heating: All models are "considered suitable for water (potable) heating."
AWARNING [ A
WARNING
HOTTER WATER CAN SCALD: Water heaters are /This water heater shall not be connected to any heat-
r
intended to produce hot water. Water heated to a ling systems or component(s) previously used with a
temperature which will satisfy clothes washing, ln°n'p°table water heating appliance.
dish washing, and other sanitizing needs can scald
ind permanently injure you upon contact. Some
}eople are more likely to be permanently injured by
tot water than others. These include the elderly, [ A WARNING
children, the infirm, or physically/mentally handi- t
capped. If anyone using hot water in your home fits /Toxic chemicals such as used for treatment of boilers
into one of these groups or if there is a local code or I /or non-potable water heating appliances shall never
state law requiring a certain temperature water at l /be introduced into a potable water space heating
the hot water tap, then you must take special pro- I [system.
cautions. In addition to using the lowest possible I
temperature settingthat satisfies your hot water I
needs, a means such as a mixing valve, should be I
used at the hot water taps used by these people or NOTE: To protect against untimely corrosionof hot and
at the water heater. Mixing valves are available at coldwater fittings, it is strongly recommendedthat di-elec-
plumbing supply or hardware stores. Follow manu- tric unions or couplings be installed on this water heater
tacturers instructions for installation of the valves.
Before changing the factory setting on the thermo- when connected to copperpipe.
star, read the "Temperature Regulation" section in
this manual.
12
Instructions for Installation (cont'd)
Locating the New Water
Heater
You should carefully" choose an indoor location for the new AWARNING
water heater, because the placement is avery important con- This water heater must not be installed directly on
sideration for the safety of the occupants in the building and carpeting. Carpeting must be protected by a metal
for the most economical use of the appliance. This water or wood panel beneath the appliance extending
heateris not for usein manufactured (mobile) homesor out- beyond the full width and depth of the appliance
by at least 3 inches (76.2mm) in any direction, or if
door installation, the appliance is installed in an alcove or closet, the
entire floor must be covered by the panel. Failure to
Whether replacing an old water heater or putting the water heed this warning may result in a fire hazard.
heater in a new location, the following critical points must be
observed.
The location selected should be indoors as close as practical to a_, WARNING
the gas vent or chimney to which the water heater vent is going Minimum clearances between the water heater and i
combustible construction are 1" at the sides and
to be connected, and as centralized with the water piping system rear, 4" at the front, and 6" from the vent pipe.
aspossible. The water heater, as all water heaters, will eventually Clearance from the top of the jacket is 18" on most
leak. Do not install without adequate drainage provisions where models. Note that a lesser dimension may be
allowed on some models. Refer to the label on the[
waterflow w_Ucausedamage, water heater adjacent to the gas control valve for
all clearances.
A CAUTION [
WATER HEATERS EVENTUALLY LEAK: Installation of ,2"HAX _1" _I"HIN.
the water heater must be accomplished in such a -- _
manner that if the tank or any connections should
leak, the flow of water will not cause damage to VENTILATION
the structure. For this reason, it is not advisable to A,R O
OPENINGS
install the water heater in an attic or upper floor. , oTOF_Ios_ " W--I_,HIN
When such locations cannot be avoided, a suitable WITHOUTDOOR T_V_
SET
drain pan should be installed under the water _'.AX. WITHDOOR
heater. Drain pans are available at your local hard-
FRONTVIEW JJ IJ
ware store. Such a drain pan must be not greater OFDOOR KECTANGULAP,3"
than 1½ inches deep, have a minimum length and IAI_DUCT HIN.
width of at least 2 inches greater than the water j Figure 1 I /dEDUCT
heater dimensions and must be piped to an ade- I I
quate drain. The pan must not restrict combustion
air flow. Under no circumstances is the manufactur-
er or Maytag to be held liable for any water dam- _WARNING
age in connection with this water heater.
A gas water heater cannot operate properly with-
out the correct amount of air for combustion. Do
not install in a confined area such a closet, unless
AWARNING you provide air as shown in the "Locating The New
Water Heater" section. Never obstruct the flow of
Propellants of aerosol sprays and volatile corn- ventilation air. If you have any doubts or questions
pounds, (cleaners, chlorine based chemicals, refrig- I at all, call your gas company. Failure to provide the
erants, etc.) in addition to being highly flammable I proper amount of combustion air can result in a fire
in many cases, will also change to corrosive[ or explosion and can cause DEATH, SERIOUS BODI-
hydrochloric acid when exposed to the combustion LY INJURY, OR PROPERTY DAMAGE.
products of the water heater. The results can be
hazardous, and also cause product failure.
The location selection must provide adequate clearances for ser-
vicing and proper operation of the water heater.
13
Instructions for Installation (cont'd)
Locating the New Water Combustion Air and Ventilation
Heater (cont'd) for Appliances Located in
Unconfined Spaces
A WARNING Unconfined Space is a space whose volume is not less than
If this water heater will be used in beauty shops, 50 cubic feet per 1,000 Btu per hour of the aggregate input
barber shops, cleaning establishments, or self-set- rating ofaU appliancesinstalled in that space.Rooms com_
vice laundries with dry cleaning equipment, it is municating directlywith the space in which the appliances are
imperative that the water heater or water heaters instaUed,through openingsnot furnished with doors,are
be installed so that combustion and ventilation air
be taken from outside these areas. Refer to the considered apart of the unconfined space
"Locating The New Water Heater" section of this In unconfned spaces in buildings, infiltration may be ade-
manual and also the current edition of the National quate to provide air for combustion, ventilation and dilution
Fuel Gas Code, ANSI Z223.1, also referred to as NFPA
154 for specifics provided concerning air required, 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
AWARNING Appliances Located in Confined Spaces, b.
INSTALLATIONS IN AREAS WHERE FLAMMABLE LIQ-
UIDS (VAPORS)ARELIKELYTO BEPRESENTOR STORED
(GARAGES, STORAGE, AND UTILITY AREAS, ETC): Combustion Air and Ventilation
Flammable liquids (such as gasoline, solvents, propane
for Locatedin
(LP) or butane, etc.), all of which emit flammable ppuances
vapors, may be improperly stored or used in such
Confined
C,, ,.
areas. The gas water heater pilot light or main burner Jpace
can ignite suchvapors. The resulting flashback and fire Confined Space is a space whose volume is less than 50 cubic
can cause death or serious burns to anyone in the
area, aswell as property damage, feet per 1,000 Bm per hour of the aggregate input rating of all
If installation in such areas is your only option, then appliances installed in that space.
the installation must be accomplished in a way that a. ALLAIR FROM INSIDE BUILDINGS:
Ithe pilot flame and main burner flame are elevated
from the floor at least 18 inches. While this may (See Page 13 Figure 1, and Figure 2 below)
ireduce the chances of flammable vapors from a floor The confined space shall be provided with two permanent
spill being ignited, gasoline and other flammable sub- openings communicating directly with an additional
stances should never be stored or used in the same room(s) of sufficient volume so that the combined volume
i room or area containing a gas water heater or other
open flame or spark producing appliance, of all spaces meets the criteria for an unconfined space.
NOTE: Flammable vaporsmay be drawn by air currents The total input of all gas utifization equipment installed in
ifrom other areas of the structure to the appliance, 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 of the
total input rating of all gas utilization equipment in the
confined space, but not less than 100 square inches. One
opening shall commence within 12 inches of the top and
one commencing within 12 inches of the bottom of the
enclosure.
ENT
FURNACE OPENINGS
[ Figure 2 ] !. I
r i i r i i r i i
i r i L r i J r L r
[ r i r t i i • _ r
14
Instructions for Installation (cont'd)
Combustion Air and Ventilation
for Appliances Locatedin
Confined Spaces (cont'd)
b. ALL AIR FROM OUTDOORS: (see Figures 3-5) 3. When communicating with the outdoors through horizon-
The confined sp_ce shall be provided with two permanent tal ducts, each opening shall have a minimum free area of 1
openings, one commencing within 12 inches of the top square inch per 2,000 BTU per hour of total input rating of
and one commencing within 12 inches from the bottom of all equipment in the enclosure. (See Figure 5.)
the enclosure. The openings shaUcommunicate directly, or
by ducts, with the outdoors or spaces (crawl or attic) that
freely communicate with the outdoors.
F_ure 5
[ Figure 3 I
4. When ducts are used, they sha]] be of the same cross-sec-
tional area as the free area of the openings to which they
connect. The minimum short side dimension of rectanguiar
1. When directly communicating with the outdoors, each air ducts shall not he less than 3 inches. (See Figure 5.)
opening shall have a minimum free area of 1 square inch
per 4,000 BTU per hour of total input rating of all equip- 5. Louvers and Grilles: In calculating free area, consideration
ment in the enclosure. (See Figure 3.) shall be given to the blocking effect of louvers, grilles or
screens protecting openings. Screens used shall not be
2. When communicating with the outdoors through vertical smaller than % inch mesh. If the free area through a design
ducts, each opening shall have a minimum free area of i of louver or grille is known, it should be used in calculating
square inch per 4,000 BTU per hour of total input rating of the size opening required to provide the free area specified.
all equipment in the enclosure. (See Figure 4.) 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 wiI1have 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.
6. Special Conditions Created by Mechanical Exhausting or
Fireplaces: Operation of exhaust fans, ventilation systems,
clothes dryers or fireplaces may create conditions requiring
-Figure ] special to unsatisfactory operation
4 attention avoid of
installed gas utilization equipment.
15
Instructions for Installation (cont'd)
Water Piping
AWARNING ] 2. Look at the top cover oftbe water heater. The cold water
HOTTER WATER CAN SCALD: Water heaters are [ inlet is marked cold. Connect the cold water pipe to the
]
intended to produce hot water. Water heated to a [ cold water inlet of the water heater.
temperature which will satisfy clothes washing, J
dish washing, and other sanitizing needs can scald [ NOTE: This water heater is superinsulated to minimize
and permanently injure you upon contact. Some I
people are more likely to be permanently injured by [ heat loss from the tank. Further reduction in heat loss
hot water than others, These include the elderly, J canbeaccomplishedbyinsulatingthehotwaterlines
children, the infirm, or physically/mentally handi- I from the water heater.
capped. If anyone using hot water in your home fits I
into one of these groups or if there is a local code or I
state law requiring a certain temperature water at [
the hot water t.a_, then you must take special pre- ]
cautions. In addition to usincj the lowest possible I
temperature setting that satisfies your hot water l
needs, a means such as a mixing valve, should be I
used at the hot water taps used by these people or
at the water heater. Mixing valves are available at
J THREADEDTO
plumbing supply or hardware stores, Follow manu- SWEATCOUPLING
facturers instructions for installation of the valves. _ SHUTOFF
Before changing the factory setting on the thermo- VALVE
thisStat'read the "Temperature Regulation" sectioninmanual. _ __"___'_'_ _
HOTOUTLET _ _ COLDINLET
This water heater shall not be connected to any heating sys- TOHOUSE WATERLINE
tems or component(s) used with a non-potable water heating II _ II
appliance.
lfa water heater is installed in a closed water supply system;
such as one having a back-flow preventer, check valve, water
3/4"THREADED-- -- 314"THREADED
meter with a check valve, etc.., in the cold water supply; COUPLING COUPLING
means shall be provided to control thermal expansion. 1" ON73and75 1"ON73 and75
GALLON GALLON
Contact the local utility or call Maytag Customer Service
Center at 1-800-788-8899 for an authorized installer on how
to control this situation. (_ _ TEMPERATURE-
PRESSURERELIEF
NOTE: To protect against untimely corrosion of hot and VALVE
cold water fittings, it is strongly recommended that all-elec-
tric unions or couplings be installed on this water heater _ DISCHARGEPIPE
when connected to copper pipe. _ (Donotcap
or plug)
The illustration shows the attachment of the water piping to
the water heater. The water heater is equipped with 3/,inch
water connections for 30, 40, 50 and 65 gallon models and 1 _ _
inch water connections for 73 and 75 gallon models.
. . A
NOTE: Ifusing copper tubing, solderrobing to an adapter i i
J
before attaching the adaptor to the cold water inlet connection. ! [ /_ 6" AIRGAP
Do not solder the cold water supplyline directly to the cold _ _d u
water inlet. It will harm the dip tube and damage the tank.
FLOORDRAIN
1. Look at the top cover of the water heater. The water outlet
is marked hot. Connect the hot water pipe to the hot
water oudet on the water heater.
16
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