American Water Heater 6510238 Manual

6510238
January 2005
Supercedes 6510220
Direct Vent
Gas Water Heater
Installation
Instructions and
Use & Care Guide
To obtain technica , warranty, or service assistance during or
after the insta ation of this water heater, visit our website at:
http://www.americanwaterheater.com
or ca to free:
1-800-999-9515
When ca ing for assistance, p ease have the fo owing
information ready:
1. Mode number
2. 7 Digit product number
3. Seria number
4. Date of insta ation
5. P ace of Purchase
Tab e of Contents ................................................... 2
Do not store or use gasoline or other
flammable vapors and liquids in the vicinity
of this or any other appliance.
WH T TO DO IF YOU SMELL G S
·Do not try to light any appliance.
·Do not touch any electrical switch;
do not use any phone in your
building.
·Immediately call your gas supplier
from a neighbors phone. Follow the
gas suppliers instructions.
·If you cannot reach your gas supplier,
call the fire department.
Installation and service must be performed
by a qualified installer, service agency or
the gas supplier.
W RNING: If the information in these
instructions is not followed exactly, a fire
or explosion may result causing property
damage, personal injury or death.
 INST LLER: AFFIX THESE INSTRUCTIONS TO OR
ADJACENT TO THE WATER HEATER.
 OWNER: RETAIN THESE INSTRUCTIONS AND
WARRANTY FOR FUTURE REFERENCE. RETAIN
THE ORIGINAL RECEIPT AS PROOF OF
PURCHASE.

2
You can be killed or seriously injured if you don't
immediately follow instructions.
You can be killed or seriously injured if you don't
follow instructions.
A safety messages wi te you what the potentia hazard is, te you how to reduce the chance of injury, and te you
what can happen if the instructions are not fo owed.
Your safety and the safety of others are very important.
We have provided many important safety messages in this manua and on your app iance. A ways read and obey a
safety messages.
This is the safety a ert symbo .
This symbo a erts you to potentia hazards that can ki or hurt you and others.
A safety messages wi fo ow the safety a ert symbo and either the word DANGER or
WARNING. These words mean:
Important Instructions
·Do not use this app iance if any part has been under water. Immediate y ca a qua ified service
technician. Water heaters subjected to f ood conditions or anytime the gas contro s, main burner or pi ot have
been submerged in water require rep acement of the entire water heater.
·Hydrogen gas can be produced in a hot water system that has not been used for a ong period of time (genera y
two weeks or more). Hydrogen gas is extreme y f ammab e and can ignite when exposed to a spark or f ame.
To prevent the possibi ity of injury under these conditions, we recommend the hot water faucet be opened for
severa minutes at the kitchen sink before using any e ectrica app iance which is connected to the hot water
system. If hydrogen is present, there wi probab y be an unusua sound such as air escaping through the faucet
as water begins to f ow. Do not smoke or have any open f ame near the faucet at the time it is open.
The Ca ifornia Safe Drinking Water and Toxic Enforcement Act requires the Governor of Ca ifornia to pub ish a ist of
substances known to the State of Ca ifornia to cause cancer, birth defects, or other reproductive harm, and requires
businesses to warn of potentia exposure to such substances.
Warning: This product contains a chemica known to the State of Ca ifornia to cause cancer, birth defects, or other
reproductive harm.
This app iance can cause ow- eve exposure to some of the substances isted, inc uding forma dehyde, carbon monxide,
and soot.
Tab e of Contents
Water Heater Safety...........................................................
Insta ing Your Gas Water Heater............................
Unpacking the Water Heater..................................
Location Requirements...........................................
Vent Cap Termination............................................
Gas Supp y..............................................................
Combustion Air Supp y and Venti ation..................
Vent Pipe System....................................................
Water System Piping..............................................
Specia App ications..........................................
Insta ation Check ist...............................................
Operating Your Water Heater............................................
Lighting Instructions............................................................
Operationa Conditions...........................................
Maintenance of Your Water Heater........................
Troub eshooting Chart........................................................
Repair Parts I ustration...............................................
P GE
1-2
3-16
3
4-5
5-6
7-8
9
9-11
12-14
15
16
17-18
17-18
20
21-24
25-26
27-28

3
Consumer Information
This water heater is design-certified by CSA Internationa
as a Category I, direct vented water heater which takes
its combustion air from the outside of the structure and
exhausts a products of combustion to the outside of the
structure.
This water heater must be insta ed according to a oca
and state codes or, in the absence of oca and state
codes, the Nationa Fue Gas Code, ANSI Z223.1(NFPA
54)- atest edition. This is avai ab e from the fo owing:
CSA America, Inc.
8501 East P easant Va ey Road
C eve and, OH 44131
Nationa Fire Protection Agency
1 Batterymarch Park
Quincy, MA 02169-7471
Check your phone istings for the oca authorities having
jurisdiction over your insta ation.
Consumer Responsibilities
This manua has been prepared to acquaint you with the
insta ation, operation, and maintenance of your gas
water heater and provide important safety information in
these areas.
Read a of the instructions thorough y before attempting
the insta ation or operation of this water heater.
Do not discard this manua . You or future users of this
water heater wi need it for future reference.
The manufacturer and se er of this water heater wi not
be iab e for any damages, injuries, or deaths caused by
fai ure to comp y with the insta ation and operating
instructions out ined in this manua .
If you ack the necessary ski s required to proper y insta
this water heater, or you have difficu ty fo owing the
instructions, you shou d not proceed but have a qua ified
service technician perform the insta ation of this water
heater. Examp es of qua ified service technicians inc ude:
those trained in the p umbing and heating industry, oca
gas uti ity personne , or an authorized service person.
Massachusetts code requires this water heater to be
insta ed in accordance with Massachusetts P umbing
and Fue Gas Code 248 CMR Section 2.00 and 5.00.
A data p ate identifying your water heater can be found
next to the gas contro va ve/thermostat. When referring
to your water heater, a ways have the information isted
on the data p ate readi y avai ab e.
Retain your origina receipt as proof of purchase.
Removing Packaging Materials
Important: Do not remove any permanent instructions,
abe s, or the data abe from outside of the water heater
or on the inside of pane s.
·Remove exterior packaging and p ace insta ation
components aside.
·Inspect a parts for damage prior to insta ation
and start-up.
·Comp ete y read a instructions before attempting
to assemb e and insta this product.
·After insta ation, dispose of packaging materia
in the proper manner.
Unpacking the Water Heater
INST LLING YOUR G S W TER HE TER
Use two or more people to move and install
water heater unless proper handling
equipment is utilized.
Failure to do so can result in back or other
injury.

4
This water heater design has been tested by CSA
Internationa and comp ies with ANSI Z21.10.1, Section
2.35 F ammab e Vapors Resistance. Therefore this water
heater does not need to be insta ed 18 inches above the
f oor un ess specifica y required by state or oca codes.
The water heater must be ocated or protected to avoid
physica damage by vehic es or f ooding.
Do not use or store f ammab e products such as gaso ine,
so vents, or adhesives in the same room or area near the
water heater. If such f ammab es must be used, a gas
burning app iances in the vicinity must be shut off and their
pi ot ights extinguished. Open the doors and windows for
venti ation whi e f ammab e substances are in use.
If f ammab e iquids or vapors have spi ed or eaked in the
area of the water heater, eave the area immediate y and
ca the fire department from a neighbor's home. Do not
attempt to c ean the spi unti a ignition sources have
been extinguished.
Figure 1: Residentia Garage Insta ation
Vehicle
Stop
Drain
Drain
Pan
NOTE:
In the State of Ca ifornia, the water heater must be braced,
anchored, or strapped to avoid moving during an earthquake.
Contact oca uti ities for code requirements in your area or
ca 1-800-999-9515 and request instructions.
Site Location
·Se ect a ocation near the center of the water
piping system. The water heater must be insta ed
indoors and in a vertica position on a eve surface.
DO NOT insta in bathrooms, bedrooms, or any
occupied room norma y kept c osed. Note: The water
heater may be insta ed in a c oset with a door off a
bedroom or bathroom providing the units are insta ed
and vented per the manufacturers instructions.
·Consider the vent piping and vent cap termination
ocation. This is a direct vent water heater and
may be vented through-the-wa . See Vent Cap
Termination on pages 5-6 of this manua for the
proper vent cap ocations.
·Locate the water heater near the existing gas
piping. If insta ing a new gas ine, ocate the water
heater to minimize the pipe ength and e bows.
Note: The water heater must be insta ed according to a
oca and state codes or, in absence of the oca and state
codes, the "Nationa Fue Gas Code, ANSI Z223.1 (NFPA
54)- atest edition.

Important: The water heater shou d be ocated in an
area where eakage of the tank or connections wi not
resu t in damage to the area adjacent to the water heater
or to ower f oors of the structure. Due to the normal
corrosive action of the water, the tank will eventually
leak after an extended period of time. lso any
external plumbing leak, including those from
improper installation, may cause early failure of the
tank due to corrosion if not repaired. If the
homeowner is uncomfortable with making the repair
a qualified service technician should be contacted.
A suitab e meta drain pan shou d be insta ed under
the water heater as shown be ow, to he p protect the
property from damage which may occur from condensate
formation or eaks in the piping connections or tank.
The pan must imit the water eve to a maximum depth
of 1-3/4 and be two inches wider than the heater and
piped to an adequate drain. The pan must not restrict
combustion air f ow. Locate the water heater near a
suitab e indoor drain. Outside drains are subject to
freezing temperatures which can obstruct the drain ine.
The piping shou d be at east 3/4 ID and pitched for
proper drainage. Under no circumstances wi the
manufacturer or se er of this water heater be he d iab e
for any water damage which is caused by your fai ure
to fo ow these instructions.
1 3/4 Max
Pipe to
Adequate
Drain
At east 2 inches greater
than the diameter of the
water heater.
·The water heater shou d be ocated in an area not
subject to freezing temperatures. Water heaters
ocated in unconditioned spaces (i.e., attics,
basements, etc.) may require insu ation of the
water piping and drain piping to protect against
freezing. The drain and contro s must be easi y
accessib e for operation and service. Maintain
proper c earances as specified on the data p ate.
5
Back 0 Sides 0
Sides
0
Top
View
Front
4 Inches
From
Combustib es
Figure 2: Minimun C earance Locations
Vent 0
Vent Cap Termination
18 Min. 18 Min.
24
Max.
Figure 3: A cove Insta ation Minimums
The termination of the vent cap must be in accordance with
the oca code or the authority having jurisdiction, or in the
absence of such, the Nationa Fue Gas Code, ANSI Z223.1,
NFPA 54, Latest Edition.
Do not terminate the vent cap in areas containing acid forming
chemica s. In et air must not contain any corrosive e ements.
Any water heater fai ure due to corrosive e ements in the
atmosphere is exc uded from warranty coverage.
See Figures 3 and 4 for correct Vent Cap Termination
Locations.
Clearances and ccessibility
Notice: Minimum c earances from combustib e materia s
are stated on the data plate adjacent to the thermostat
of the water heater.
·The water heater is certified for insta ation on a
combustib e f oor.
Important: If insta ing over carpeting, the carpeting must
be protected by a meta or wood pane beneath the water
heater. The protective pane must extend beyond the fu
width and depth of the water heater by at east 3 inches
(76.2mm) in any direction or if in a a cove or c oset
insta ation, the entire f oor must be covered by the pane .
The pane must be strong enough to carry the weight of
the heater when fu of water.
Figure 2 may be used as a reference guide to ocate the
specific c earance ocations. A minimum of 24 inches of
front c earance shou d be provided for inspection and
service.

6
The Vent termina is HOT when the water heater is in
operation. Do not touch the vent termina or p ace any object
where contact with the vent termina may occur. A protective
ouvered wa or fence is recommended when the hot vent
cap is ow enough to be touched accidenta y (see Figure 5).
A Vent guard kit (Kit # 6907245) may be ordered by contacting
the manufacturer of this water heater at 1-800-999-9515.
 The exhaust out et must not terminate under a patio, deck,
or any covered area.
 Do not terminate the exhaust out et near wa kways or into
a eys or other pub ic y accessib e areas.
 Do not ocate the vent termina too c ose to shrubs or
bushes.
 Cau k a cracks, seams, and joints within 6 feet horizonta y
above and be ow the vent.
 Do not terminate the vent within 12 inches of any other
direct vented app iance vent
HOT
Hot Vent Cap
Protective Louvered
Wa or Fence
Figure 5: Protective Louvered Wa or Fence
3 feet Min.
Figure 4: Vent Cap Termination Locations
. 12 in (30 cm) min. c earance above grade, veranda,
porch, deck, ba cony, or maximum anticipated snow
eve .
B. 9 in (23 cm) min. c earance on top and side of window
or door that may be opened. Do not insta be ow a
window or door that may be opened.
C. C earance to permanent y c osed window.**
D. 12 in (30 cm) min vertica c earance to venti ated soffit.
E. 12 in (30 cm) min. c earance to unventi ated soffit.
F. C earance to outside corner **
U.S. Installation
**C earance in accordance with oca insta ation codes and the requirements of the gas supp ier
G. 12 in (30 cm) min. c earance to inside corner formed
by two exterior wa s.
H. 4 ft (122 cm) min. c earance to each side of center ine
extending above meter/regu ator assemb y.
I. 4 ft (122 cm) min. c earance to service regu ator vent
out et.
J. 12 in (30 cm) min. c earance to nonmechanica air
supp y in et to bui ding or the combustion air in et to
any other app iance.
K. 3 ft (91 cm) above if within 10 ft (3 m) horizonta y of
mechanica air supp y in et.

7
Manua gas
shutoff va ve
Ground joint
union
3 In. Min.
Check with
oca uti ity
for min. height
Drip eg
Figure 6: Gas Piping
Gas Pressure
Important: The gas supp y pressure must not exceed the
maximum supp y pressure as stated on the water heaters
data p ate. The minimum supp y pressure is for the purpose
of input adjustment.
Gas Requirements
Read the data plate to be sure the water heater is made
for the type of gas you will be using in your home. This
information wi be found on the data p ate ocated near the
gas contro va ve. If the information does not agree with the
type of gas avai ab e, do not insta or ight. Ca your dea er.
Note: An odorant is added by the gas supp ier to the gas
used by this water heater. This odorant may fade over an
extended period of time. Do not depend upon this odorant
as an indication of eaking gas.
Gas Piping
The gas piping must be insta ed according to a oca and
state codes or, in absence of oca and state codes, the
Nationa Fue Gas Code, ANSI Z223.1 (NFPA 54)- atest
edition.
Tab es 1 and 2 on page 8 are provided as a sizing reference
for common y used gas pipe materia s. Consu t the Nationa
Fue Gas Code for the recommended gas pipe size of other
materia s.
Refer To Figure 6
1. Insta a readi y accessib e manua shutoff va ve
in the gas supp y ine as recommended by the
oca uti ity. Know the ocation of this va ve and
how to turn off the gas to this unit.
2. Insta a drip eg (if not a ready incorporated as
part of the water heater) as shown. The drip eg
must be no ess than 3 inches ong for the
accumu ation of dirt, foreign materia and water
drop ets.
3. Insta a ground joint union between the gas
va ve/thermostat and the manua shutoff va ve.
This is to a ow easy remova of the gas va ve/
thermostat.
Explosion Hazard
Use a new G or CS approved gas
supply line.
Install a shut-off valve.
Do not connect a natural gas water heater
to a L.P. Gas Supply.
Do not connect a L.P. gas water heater to
a natural gas supply.
Failure to follow these instructions can
result in death, explosion, or carbon
monoxide poisoning.

8
Nominal Iron Pipe Length of Pipe, Feet
Size, in.
1/2
3/4
1
1-1/4
1-1/2
132
278
520
1050
1600
92
190
350
730
1100
73
152
285
590
890
63
130
245
500
760
56
115
215
440
670
50
105
195
400
610
46
96
180
370
560
43
90
170
350
530
40
84
160
320
490
38
79
150
305
460
34
72
130
275
410
31
64
120
250
380
28
59
110
225
350
26
55
100
210
320
10 20 30 40 50 60 70 0 90 100 125 150 175 200
TABLE 1
NATURAL GAS PIPE CAPACITY TABLE (CU. FT./HR)
Capacity of gas pipe of different diameters and lengths in c . ft. per hr. with press re drop of 0.3 in. and specific gravity
of 0.60 (nat ral gas).
After the length of pipe has been determined, select the pipe size which will provide the minim m c bit feet per ho r req ired for the
gas inp t rating of the water heater. By form la:
Gas Inp t of Water Heater (BTU/HR)
Heating Val e of Gas (BTU/FT³)
The gas inp t of the water heater is marked on the water heater data plate. The heating val e of the gas (BTU/FT3) may be determined
by cons lting the local nat ral gas tility.
C . Ft. Per Hr. Req ired =
Nominal Iron Pipe Length of Pipe, Feet
Size, in.
1/2
3/4
1
1-1/4
275
576
1071
2205
189
393
732
1496
152
315
590
1212
129
267
504
1039
114
237
448
913
103
217
409
834
96
196
378
771
89
185
346
724
83
173
322
677
78
162
307
630
69
146
275
567
63
132
252
511
10 20 30 40 50 60 70 0 90 100 125 150
TABLE 2
LP GAS CAPACITY TABLE
Maxim m capacity of pipe in tho sands of BTU per ho r of ndil ted liq efied petrole m gases (at 11 inches water col mn press re).
Based on a Press re Drop of 0.5 Inch Water Col mn.
Example: Inp t BTU req irement of the water heater, 100,000 BTUH
Total pipe length, 80 feet = 3/4" IPS req ired.
Additional tables are available in the latest edition of the "National F el Gas Code", ANSI Z223.1
Gas Pressure Testing
Important: This water heater and its gas connection
must be eak tested before p acing the app iance in
operation.
·If the code requires the gas ines to be tested at
a pressure exceeding 14 W.C., the water heater
and its manua shutoff va ve must be disconnected
from the gas supp y piping system and the ine
capped.
·If the gas ines are to be tested at a pressure ess
than 14 W.C., the water heater must be iso ated
from the gas supp y piping system by c osing its
manua shutoff va ve.
U.L. recognized fue gas and carbon monoxide (CO)
detectors are recommended in a app ications and
shou d be insta ed using the manufacturers instructions
and oca codes, ru es, or regu ations.
Note: Air may be present in the gas ines and cou d
prevent the pi ot from ighting on initia start-up. The gas
ines shou d be purged of air by a qua ified service
technician after insta ation of the gas piping system.
Explosion Hazard
Have a qualified person make sure L.P.
gas pressure does not exceed 13 water
column.
Failure to do so can result in death,
explosion, or fire.

9
Important: Air for combustion and venti ation must not
come from a corrosive atmosphere. Any fai ure due to
corrosive e ements in the atmosphere is exc uded from
warranty coverage.
Vent Pipe System
This is a direct vent water heater which draws its combustion
air from outside of the structure and exhausts a products
of combustion to the outside of the structure.
Through-the-wa insta ations require ocating the water
heater next to an outside wa . A necessary components
are supp ied for the standard through-the-wa insta ation.
Optiona vertica and horizonta extension kits are avai ab e
for insta ations that exceed the standard horizonta and
vertica distances (see tab e at right). On y one vertica and
one horizonta kit can be used on the same insta ation.
Through the Wall Venting
1. Make sure a proper ocation has been se ected for the
water heater insta ation. Consider the fo owing:
·Water piping
·Gas Piping
·Access for service
·Proper c earance for combustib es
·Drainage for the temperature and pressure re ief
va ve and drain pan.
·Vent cap termination
2. Determine the A dimension for your specific water heater
by referencing figure 7. Cut a 6 inch opening through the
wa in the ocation as shown. Determine the ocation of
e ectrica wiring, pipes, or wa studs before cutting.
NOTE: Insta ations requiring an A dimension (vertica
height) greater than what is shown as standard in the tab e
wi require the use of a vertica extension kit (See Vertica
Insta Kit on Page 10).
3. If you are not using the vertica extension kit, p ace the
3 e bow on the f ue pipe reducer on the air box and point
it in the desired direction (See Figure 8). Press it firm y
downward unti seated. Dri 4 ho es 90° apart with a 1/8
dri bit and fasten the four #8 sheet meta screws provided.
App y si icone sea ant to the joint. Insta the 5 e bow
over the 3 e bow and seat it into the co ar on the air box.
Dri 4 ho es 90° apart with a 1/8 dri bit and fasten the
four #8 sheet meta screws provided. App y si icone
sea ant to the joint. P ace the inner wa cover p ate over
the 5 e bow. This p ate wi be positioned ater.
Figure 7: A & B Dimensions
Figure 7: A & B Dimensions
KIT
CAPACITY
40 GALLON 50 GALLON
A B A B
62.75
62.75
62.75 - 89.75
62.75 - 89.75
15.75 - 24.50
27.00 - 38.00
15.75 - 24.50
27.00 - 38.00
ST ND RD
HORIZONT L
VERTIC L
BOTH
71.00
71.00
71.00 - 98.00
71.00 - 98.00
15.75 - 24.50
27.00 - 38.00
15.75 - 24.50
27.00 - 38.00
Figure 8: Vertica Insta ation
3 E bow
Screws &
Sea ant
1
2
5 Pipe
3 E bow
Inside Cover
P ate
Screws
& Sea ant
B
 
Combustion ir Supply and
Ventilation
NOTE:
1. Dim.   measured from center of cutout to bottom of heater.
2. Dim. B measured from center of heater to outside of wall.

10
9. Position and fasten the inner wa p ate to the inside wa
using an appropriate fastener for the specific wa
construction. App y si icone sea ant between the inner
wa p ate and the inside wa .
10. Make certain the 5 te escoping pipe has been fu y
engaged onto the 5 inch e bow. Dri two 1/8 ho es 180°
apart at the junction of the two joints. Secure with four
#8 sheet meta screws and app y si icone sea ant to the
seams. Make sure a the 5 pipe joints are sea ed inc uding
the joint to the co ar on the water heaters air supp y box
(See Figure 9).
4. Extend the 3 te escoping pipe to its maximum ength.
P ace the sma er section onto the 3 e bow at east 1 and
1/2 inches (See Figure 9). Dri two ho es 180° apart
and secure with the two #8 sheet meta screws provided.
App y si icone sea ant to the joint.
5. Attach the arger section of the 5 te escoping pipe to the
f ange on the outer wa p ate (See Figure 9). Dri ho es
90° apart with a 1/8 dri bit and fasten with four #8 sheet
meta screws (provided). App y si icone sea ant to the
seam.
6. Extend the 5 te escoping tube to its maximum ength.
From outside of the bui ding, insert a 5 tube/outer wa
p ate assemb y through the opening in the exterior wa
and onto the 5 e bow (See Figure 9). Seat the base of
the outer wa p ate onto the exterior wa . App y si icone
sea ant between the p ate and the exterior wa .
Figure 9: Vertica Insta ation
3 Pipe
Inner Wa
P ate Screws
& Sea ant 3 Te escoping
Pipe
Wa
7. P ace the 3 tube ocated in the vent cap into the end of
the 3 te escoping tube (See Figure 10). Dri two ho es
180° apart with a 1/8 dri bit and secure with two #8
sheet meta screws. App y sea ant to the joint. Seat the
cap against outer wa p ate with the word HOT in an
upright position.
8. Secure the vent cap/outer wa p ate assemb y to the
exterior wa with the four 1 and 1/2 screws provided
(See Figure 10). Varying wa structures may require a
different type of screw anchor. To prevent rain from
entering the water heater vent pipe, the 5 tube shou d
be s oped downward towards the wa 1/4 per foot.
Figure 10: Vertica Insta ation
5 E bow
Inner Wa
P ate
Screws
& Sea ant
3 Te escoping
Pipe
5 Te escoping Pipe
Outer Wa P ate
Inner Wa
P ate Screws
& Sea ant
Outer
Wa
P ate
HOT
Screws
Vent Cap
Screws
Sea ant
S ope down 1/4
per foot
Optional Vertical Extension Kit
Insta ations requiring dimension "A" to be greater than 62.75
(40 Ga on) or 71.00 (50 Ga on) wi require the use of the
optiona vertica extension kit. The maximum height of the
"A" dimension cannot exceed 98 inches. If the "A" dimension
for your app ication is ess than 98 inches, you wi have to
cut the 3 and 5 inch pipes in the vertica extension kit to the
correct ength. For examp e, if your app icab e "A" distance
is 80 inches, then 98 inches - 80 inches = 18 inches. Therefore,
you wi need to cut 18 inches from both the 3 and 5 inch
vertica extension pipes. DO NOT CUT THE CRIMPED END
OF THE 5 INCH PIPE.
After cutting both the pipes to the proper size, p ace the 3
vertica extension pipe over the f ue pipe reducer on the
upper air box and press it firm y downward unti seated. Using
a eve , make sure the extension tube is pointing straight up.
Dri 4 ho es 90° apart with a 1/8 dri bit and fasten with four
#8 sheet meta screws (provided). App y si icone sea ant to
the seam.
P ace the uncrimped end of the 5 inch extension pipe over
the 3 inch extension pipe and seat it onto the co ar on the
air box. Making sure the 3 inch extension pipe is centered
in the 5 inch pipe, dri four ho es 90° apart with the 1/8 dri
bit and fasten with four #8 sheet meta screws (provided).
App y si icone sea ant to the seam. P ace the f ared end of
the 3 inch e bow over the 3 inch extension pipe and press
it firm y downward unti seated. Dri four ho es 90° apart with
the 1/8 dri and fasten with four #8 sheet meta screws
(provided). App y si icone sea ant to the seam.
Insta the 5 inch e bow over the 3 inch e bow and seat it
down onto the crimped end of the 5 inch extension pipe.
Temporari y p ace the 5 inch te escoping pipe onto the 5 inch
e bow and adjust it to give a 1/4 inch per foot downward
s ope to the outside wa . Secure the 5 inch e bow to the
extension pipe by dri ing four ho es 90° apart with the 1/8
dri and inserting four #8 sheet meta screws. App y si icone
sea ant to the joint. P ace the inner wa cover p ate over the
5 inch e bow. This p ate wi be positioned ater. Proceed to
step 4.

11
THROUGH THE ROOF VENTING*
1. Center the heater direct y under the roof opening.
This vent system must be insta ed vertica y on y.
2. A the pipes needed to assemb e the vent are inc uded
in the kit. Do not add to the ength of the vent system.
The tota height is imited to 15 feet on a 50-ga on
heater (See Figure 11). The 40-ga on heater is 8
and1/4 shorter. The tota 15-foot height must stick
through the roof a minimum of 2 feet. If the height
needed is ess than 15 feet, determine the height
needed and subtract that from 15 feet. That amount
needs to be cut off one of the 3 pipes and 5 pipes.
Cut the non-f ared end of the 3 pipe and the uncrimped
end of the 5 pipe.
3. Assemb e the kit from the top down starting with the
termination. Attach a 3 pipe using 4 #8 sheet meta
screws 90° apart and sea the joint with sea ant. Then
attach the 5 section in the same manor. Dri 1/8
pi ot ho es for the screws. Continue unti the fu ength
is assemb ed. Put the te escoping 5 section on ast.
4. P ace the heater in position, feed the vent assemb y
down through the roof with the f ashing in p ace, and
a ow it to rest with the 3 pipe attached to the 3 vent
termina on the heater. Use screws and sea ant to
secure that joint. Extend the 5 te escoping section to
connect to the 5 termination on the heater. Secure
that joint with screws. Sea that joint and the s iding
joint with si icone to make an airtight assemb y.
5. Secure the f ashing and vent assemb y to the roof.
(*Through the Roof Venting Kit avai ab e from manufacturer)
Roof Jack Assemb y
8 Ft. Min.
15 Ft. Max
Roof F ashing
Secure A
Connections
with Screws
and App y
Si icone
Sea ant
Figure 11: Through the Roof Venting
2 Ft. Min.
From Any Object
within A 10 Foot
Horizonta Radius

Water System Piping
Piping Installation
Piping, fittings, and va ves shou d be insta ed according
to the insta ation drawing (Figure 12). If the indoor
insta ation area is subject to freezing temperatures, the
water piping must be protected by insu ation.
Water supp y pressure shou d not exceed 80% of the
working pressure of the water heater. The working
pressure is stated on the water heaters data p ate. If
this occurs a pressure imiting va ve with a bypass may
need to be insta ed in the co d water in et ine. This
shou d be p aced on the supp y to the entire house in
order to maintain equa hot and co d water pressures.
Important: Heat cannot be app ied to the water fittings
on the heater as they may contain nonmeta ic parts. If
so der connections are used, so der the pipe to the
adapter before attaching the adapter to the hot and co d
water fittings.
Important: A ways use a good grade of joint compound
and be certain that a fittings are drawn up tight.
1. Insta the water piping and fittings as shown in
Figure 12. Connect the co d water supp y
(3/4 NPT) to the fitting marked C. Connect
the hot water supp y (3/4 NPT) to the fitting
marked H.
Important: Some mode s may contain energy saving
heat traps to prevent the circu ation of hot water within
the pipes. Do not remove the inserts within the heat
traps.
2. The insta ation of unions in both the hot and
co d water supp y ines is recommended for
ease of removing the water heater for service or
rep acement.
3. The manufacturer of this water heater recommends
insta ing a tempering va ve or an anti-sca d device
in the domestic hot water ine as shown in Figure
13. These va ves reduce the point of use
temperature of the water by mixing co d and hot
water and are readi y avai ab e for use. Contact
a icensed p umber or the oca p umbing authority.
4. If insta ing the water heater in a c osed water
system, insta an expansion tank in the co d water
ine as specified under C osed System/Therma
Expansion (Page 13).
5. Insta a shut-off va ve in the co d water in et ine.
It shou d be ocated c ose to the water heater and
be easi y accessib e. Know the ocation of this
va ve and how to shut off the water to the heater.
6. Insta a temperature and pressure re ief va ve in
the opening marked Temperature and Pressure
(T & P) Re ief Va ve on the water heater. Add a
discharge ine to the opening of the T & P re ief
va ve. Fo ow the instructions under Temperature
and Pressure Re ief Va ve" (Page 14).
7. After piping has been proper y connected to the
water heater, remove the aerator at the nearest
hot water faucet. Open the hot water faucet
and a ow the tank to comp ete y fi with water. To
purge the ines of any excess air, keep the hot
water faucet open for 3 minutes after a constant
f ow of water is obtained. C ose the faucet and
check a connections for eaks.
In a Closed System Use
a Thermal Expansion Tank
Pressure Reducing
Valve with Bypass
Main
Water
Supply
Cold Water
Inlet Valve
Hot Water
Outlet
Union
Temperature and
Pressure Relief Valve
Discharge Line
6 Inches Maximum
bove Drain
Drain Line
3/4 Inch ID
Minimum
Drain
Metal
Drain Pan
1 3/4 Inch Depth Max.
1 Inch
Min.
Massachusetts: Install a
vacuum relief in cold water
line per section 19 MGL 142.
Figure 12: Water Piping Insta ation
Fo ow the tempering
Va ve manufacturers
Instructions
Co d
Water
In et
Hot
Water
Out et
Tempered
water to fixtures Tempering Va ve
(Set to 120°F)
Figure 13: Typica Tempering Va ve Insta ation
Figure 13: Typica Tempering Va ve Insta ation
12
Cold Water Supply
to Fixtures

P ease note the fo owing:
DO NOT insta this water heater with iron piping. The
system shou d be insta ed on y with piping that is
suitab e for potab e (drinkab e) water such as copper,
CPVC, or po ybuty ene. DO NOT use PVC water
piping.
DO NOT use any pumps, va ves, or fittings that are
not compatib e with potab e water.
DO NOT use va ves that may cause excessive
restriction to water f ow. Use fu f ow ba or gate
va ves on y.
DO NOT use 50/50 tin- ead so der (or any ead based
so der) in potab e water ines. Use 95/5 tin-antimony
or other equiva ent materia .
DO NOT tamper with the gas va ve/thermostat, igniter,
thermocoup e, or temperature and pressure re ief
va ve. Tampering voids a warranties. On y qua ified
technicians shou d service these components.
DO NOT use with piping that has been treated with
chromates, boi er sea , or other chemica s.
DO NOT add any chemica s to the system piping
which wi contaminate the potab e water supp y.
Closed System/Thermal Expansion
Periodic discharge of the temperature and pressure
re ief va ve may be due to therma expansion in a c osed
water supp y system. The water uti ity supp y meter may
contain a check va ve, backf ow preventer or water
pressure reducing va ve. This wi create a c osed water
system. During the heating cyc e of the water heater,
the water expands causing pressure inside the water
heater to increase. This may cause the temperature
and pressure re ief va ve to discharge sma quantities
of hot water. To prevent this, it is recommended that a
diaphragm-type expansion tank (suitab e for potab e
water) be insta ed on the co d water supp y ine. The
expansion tank must have a minimum capacity of 1.5
U.S. ga ons for every 50 ga ons of stored water. Contact
the oca water supp ier or p umbing inspector for
information on other methods to contro this situation.
Important: Do not plug or remove the temperature
and pressure relief valve.
13

For protection against excessive pressures and
temperatures, a temperature and pressure re ief va ve
must be insta ed in the opening marked T & P RELIEF
VALVE (see Figure 14). This va ve must be design
certified by a nationa y recognized testing aboratory
that maintains periodic inspection of the production of
isted equipment or materia s as meeting the
requirements for Re ief Va ves and Automatic Shut-off
Devices for Hot Water Supp y Systems, ANSI Z21.22.
The function of the temperature and pressure re ief
va ve is to discharge water in arge quantities in the
event of excessive temperature or pressure deve oping
in the water heater. The va ve's re ief pressure must
not exceed the working pressure of the water heater
as stated on the data p ate.
Explosion Hazard
If the temperature and pressure relief valve
is dripping or leaking, have a licensed
plumber correct the problem.
Do not plug valve.
Do not remove valve.
Failure to follow these instructions can
result in death, or explosion.
Important: On y a new temperature and pressure re ief
va ve shou d be used with your water heater. Do not
use an o d or existing va ve as it may be damaged or
not adequate for the working pressure of the new water
heater. Do not p ace any va ve between the re ief va ve
and the tank.
The Temperature & Pressure Relief Valve:
·Must not be in contact with any e ectrica part.
·Must be connected to an adequate discharge ine.
·Must not be rated higher than the working pressure
shown on the data p ate of the water heater.
The Discharge Line:
·Must not be sma er than the pipe size of the re ief
va ve or have any reducing coup ing insta ed in
the discharge ine.
·Must not be capped, b ocked, p ugged or contain
any va ve between the re ief va ve and the end of
the discharge ine.
·Must terminate a maximum of 6 inches above a
f oor drain or externa to the bui ding.
·Must be capab e of withstanding 250°F (121°C)
without distortion.
·Must be insta ed to a ow comp ete drainage of
both the va ve and discharge ine.
Temperature and Pressure
Re ief Va ve
Discharge Line
3/4 Inch Min.
DO NOT C P OR PLUG
6 inch maximum
Drain pan
Drain
Figure 14: T & P Va ve Insta ation
14
Temperature and Pressure
Relief Valve

15
Solar Installation
If this water heater is used as a so ar storage heater or
as a backup for the so ar system, the water supp y
temperatures to the water heater tank may be in excess
of 120°F. A tempering va ve or other temperature imiting
va ve must be insta ed in the water supp y ine to imit the
supp y temperature to 120°F.
Note: So ar water heating systems can often supp y water
with temperatures exceeding 180°F and may resu t in
water heater ma function.
IMPORT NT: Water supp y to this heater must not
exceed 180°F. Water temperature in excess of 180°F
wi cause the High Limit Contro to open and shut off the
gas supp y to the unit. The High Limit Contro is a sing e
use type that wi require the rep acement of the thermostat
before the burner wi operate.
Special pplications
Combination Space Heating/ Potable
Water System
Some water heater mode s are equipped with in et/out et
tappings for use with space heating app ications. If this
water heater is to be used to supp y both space heating
and domestic potab e (drinking) water, the instructions
isted be ow must be fo owed.
·Be sure to fo ow the manua (s) shipped with the
air hand er system.
·This water heater is not to be used as a
rep acement for an existing boi er insta ation.
·Do not use with piping that has been treated with
chromates, boi er sea or other chemica s and do
not add any chemica s to the water heater piping.
·If the space heating system requires water
temperatures in excess of 120°F, a tempering
va ve or an anti-sca d device shou d be insta ed
per its manufacturers instructions in the domestic
(potab e) hot water supp y to imit the risk of sca d
injury.
·Pumps, va ves, piping and fittings must be
compatib e with potab e water.
·A proper y insta ed f ow contro va ve is required
to prevent thermosiphoning. Thermosiphoning is
the resu t of a continuous f ow of water through
the air hand er circuit during the off cyc e. Weeping
(b ow off) of the temperature and pressure re ief
va ve (T & P) or higher than norma water
temperatures are the first signs of thermosiphoning.
·The domestic hot water ine from the water heater
shou d be vertica past any tempering va ve or
supp y ine to the air hand er to remove air
bubb es from the system. Otherwise, these bubb es
wi be trapped in the air hand er heat exchanger
coi , reducing the efficiency.
·Do not connect the water heater to any system or
components previous y used with non-potab e
water heating app iances when used to supp y
potab e water.
Some jurisdictions may require a backf ow preventer in
the incoming co d water ine. This may cause the
temperature and pressure re ief va ve on the water
heater to discharge or weep due to expansion of the
heated water. A diaphragm-type expansion tank suitab e
for potab e water wi norma y e iminate this weeping
condition. P ease read and fo ow the manufacturers
instructions for the insta ation of such tanks.
A so see Water System Piping (Page 12) for additiona
instructions on the safe and correct insta ation and
operation of this water heater.
Coi
Must Be Vertica To Remove
Air Bubb es
Domestic
Hot Water
Out
Tempering
Va ve
Hot
Water
Out
Unions
Co d
Water
In et Pump F ow Contro
Va ve
To
Air
Hand er
Shut Off Va ve
Out In
Air
Hand er
Typica tempering va ve
insta ation Combination space
heating/ potab e water heating system
Massachusetts Code
does not a ow this type
of insta ation.
Figure 15: Space Heating Piping Insta ation

Water Heater Location
·Centra y ocated with the water piping system.
Located as c ose to the gas piping and vent pipe
system as possib e.
·Located indoors and in a vertica position. Protected
from freezing temperatures.
·Proper c earances from combustib e surfaces
maintained and not insta ed direct y on a carpeted
f oor.
·Provisions made to protect the area from water
damage. Drain pan insta ed and piped to an
adequate drain.
·Insta ation area free of corrosive e ements and
f ammab e materia s.
·Sufficient room to service the water heater.
·Water heater not ocated near an air moving device.
Gas Supply and Piping
·Gas supp y is the same type as isted on the water
heater data p ate.
·Gas ine equipped with shut-off va ve, union and
drip eg.
·Approved pipe joint compound used.
·Adequate pipe size and of approved materia .
·Ch oride-free soap and water so ution or other
approved means used to check a connections
and fittings for possib e gas eaks.
INST LL TION CHECKLIST
16
Water System Piping
·Temperature and pressure re ief va ve proper y
insta ed with a discharge ine run to an open drain
and protected from freezing.
·A piping proper y insta ed and free of eaks.
·Heater comp ete y fi ed with water.
·C osed system pressure bui d-up precautions
insta ed.
·Tempering va ve insta ed per manufacturers
instructions.
Combustion ir Supply and Ventilation
·Must not come from a corrosive atmosphere.
Vent Pipe System
·Proper ocation on an outside wa se ected for
Through the Wa Venting.
·A Dimensions determined per water heater to
determine whether a Vertica Extension kit is
needed.
·Optiona Vertica Extension Kit Insta ed (if
necessary).
·Heater centered direct y under the roof opening
for Through the Roof Venting.
·Through the roof venting has a 15 foot maximum
height for the 50 Ga on direct vent water heater
and a maximum of 14 3-1/4 for the 40 Ga on
direct vent water heater.

17
OPER TING YOUR W TER HE TER
Lighting Instructions
Read and understand these directions thorough y before
attempting to ight or re- ight the pi ot. Make sure the tank
is comp ete y fi ed with water before ighting the pi ot.
Check the data p ate near the gas va ve contro /thermostat
for the correct gas. Do not use this water heater with any
gas other than the one isted on the data p ate. If you
have any questions or doubts, consu t your gas supp ier
or gas uti ity company.
Explosion Hazard
IMPORTANT: If the pilot will not stay lit after several tries,
turn gas control knob to OFF and call your service
technician or gas supplier.
IMPORTANT: If the reset button does not pop up when
released, stop and immediately shut off the gas at the line
valve or tank. Call your service technician or gas supplier.
7. Turn the gas control knob
counterclockwise to ON .
8. Set the temperature dial to
the desired setting.
9. Replace the outer door.
1. Turn the temperature dial counterclockwise to its
lowest setting.
1. Remove the outer door.
2. Turn the temperature dial counterclockwise to its
lowest setting.
3. Turn gas control knob clockwise
to the OFF position.
4. To clear any gas that may have
accumulated wait ten (10) minutes.
If you then smell gas, STOP! Refer to the safety warning
on the cover. If you do not smell gas go to the next step.
5. Turn the gas control knob
counterclockwise
to PILOT .
LIGHTING INSTRUCTIONS
RESET
BUTTON
INDEX
B RS
130° F
B R
130° F
B R
120° F
B R
6. Depress the reset button all the way
in and IMMEDIATELY depress the igniter
button until you hear a loud click.
Observe the pilot through the view port.
Do not release the reset button. Repeat
immediately if pilot does not light on
the first try.
Continue to hold the
button for about (1) minute after the
pilot is lit. Release the reset button and
it will pop back up. Pilot should remain
lit. If the pilot light goes out, repeat
steps 2 - 6.
If the pilot does not light
by the fourth attempt with the igniter,
repeat steps 3 - 6.
TO TURN OFF GAS TO APPLIANCE
2. Turn the gas control knob clockwise to the OFF
position.
IGNITER
Replace viewport if glass is missing or
damaged.
Failure to do so can result in death,
explosion or fire.

L.P.G. (Bottled Propane) Models
Liquefied Petro eum Gas is over 50% heavier than air and in the occurrence of a eak in the system, the gas wi sett e
on the f oor eve . Basements, craw spaces, skirted areas under mobi e homes (even when venti ated), c osets and
areas be ow ground eve wi serve as pockets for the accumu ation of gas. Before ighting, sme a around the
app iance at f oor eve . If you sme gas, fo ow the instructions as given in the warning on the front page. See the
instructions be ow on ighting the L.P. Direct Vent gas water heater.
When the unit fai s to operate proper y because the L.P. tank is ow on fue or the outside temperature is very co d,
turn off the gas at a gas app iances inc uding the pi ot ights. After the tank is refi ed, a app iances must be re- it
according to their manufacturers instructions.
18
TO TURN OFF GAS TO APPLIANCE
2. Turn the gas control knob clockwise to the OFF
position.
1. Turn the temperature dial counterclockwise to its
lowest setting.
LIGHTING INSTRUCTIONS
6. Depress the gas control knob all the
way in and IMMEDIATELY depress the
igniter button until you hear a loud
click. Observe the pilot through the
view port. Do not release the gas
control knob. Repeat immediately if
pilot does not light on the first try.
If the pilot does not light by the fourth
attempt with the igniter, repeat steps
4 - 7. Continue to hold the knob for
about (1) minute after the pilot is lit.
Release the gas control knob and it
will pop back up. Pilot should remain
lit. If the pilot light goes out, repeat
steps 3 - 7.
1. Remove the outer door.
2. Turn the temperature dial counterclockwise to its
lowest setting.
3. Turn gas control knob clockwise
to the OFF position.
4. To clear any gas that may have
accumulated wait ten (10) minutes.
If you then smell gas, STOP! Refer to the safety
instructions on the cover. If you do not smell gas go to
the next step.
5. Turn the gas control knob
counterclockwise
to PILOT.
IMPORTANT: If the pilot will not stay lit after several tries,
turn gas control knob to OFF and call your service technician
or gas supplier.
IMPORTANT: If the gas control knob does not pop up when
released, stop and immediately shut off the gas at the line
valve or tank. Call your service technician or gas supplier.
7. Turn the gas control knob
counterclockwise
to ON.
8. Set the temperature dial to
the desired setting.
9. Replace the outer door.
IGNITER
O
F
F
O
N
O
F
F
O
N
120° F
BAR
130° F
BAR
INDEX
BAR
GAS
CONTROL
KNOB
130° F
BAR
P
I
L
O
T
P
I
L
O
T
P
I
L
O
T
O
F
F
O
N
CAUTION
O N
O
F
F
P I
T
O
L
BEFORE LIGHTING
WARNING
READ ALL INSTRUCTIONS
A
W
T
A
E
P
M
R
N
O
T
W
A
H
S
T
R
E
B
O
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T
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I
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A
C S
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T
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W
A
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A
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I
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T

Burner Flames
Inspect the burner
f ames through the
viewport and compare
them to the drawings in
Figure 16. A proper y
operating burner
shou d produce a soft
b ue f ame. B ue tips
with ye ow inner cones
are satisfactory. The
tips of the f ame may have a s ight ye ow tint. The f ame
shou d not be a ye ow or have a sharp b ue-orange
co or. Contaminated air may cause an orange co ored
f ame. Contact a qua ified service technician if the f ame
is not satisfactory.
Stacking
Stacking occurs when a series of short draws of hot
water (3 ga ons or ess) are taken from the water heater
tank. This causes increased cyc ing of the burner and
can resu t in increased water temperatures at the hot
water out et. An anti-sca d device is recommended in
the hot water supp y ine to reduce the risk of sca d
injury.
Emergency Shut Down
Important: Shou d overheating occur or the gas supp y
fai s to shut off, turn off the water heaters manua gas
contro va ve and ca a qua ified service technician.
Water Temperature Regulation
Water temperature over 125°F can cause
severe burns instantly or death from
scalds.
Children, disabled and elderly are at
highest risk of being scalded.
See instructions manual before setting
temperature at water heater.
Feel water before bathing or showering.
Temperature limiting valves are available.
The thermostat is adjusted to its owest temperature
when it is shipped from the factory. Water temperature
can be regu ated by moving the temperature dia to the
preferred setting. The preferred starting point is 120°F.
A ign the index bar on the thermostat with the desired
water temperature as shown in Figures 17A and 17B.
There is a hot water scald potential if the thermostat
is set too high.
Important: Adjusting the thermostat past the 120°F
bar on the temperature dia wi increase the risk of sca d
injury. Hot water can produce first degree burns within:
120°F (49°C) more than 5 minutes
130°F (54°C) at 20 seconds
140°F (60°C) at 3 seconds
150°F (66°C) at 1-1/2 seconds
160°F (71°C) at ess than 1 second
19
Note: During ow demand periods when hot water is
not being used, a ower thermostat setting wi reduce
energy osses and may satisfy your norma hot water
needs. If hot water use is expected to be more than
norma , a higher thermostat setting may be required to
meet the increased demand. When eaving your home
for extended periods (vacations, etc.) turn the
temperature dia to its owest setting. This wi maintain
the water at ow temperatures with minimum energy
osses and prevent the tank from freezing during co d
weather.
REMOV BLE
REGUL TOR
C P
UNITROL
BEFORE
LIGHTING
READ ALL INSTRUCTIONS
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120° F
B R
130° F
B R
INDEX
B RS
G S
CONTROL
KNOB
Figure 17A: Robert Shaw Gas Va ve/Thermostat Settings (Natura )
WARNING
130° F
B R
RESET
BUTTON
Figure 17B: Robert Shaw Gas Va ve/Thermostat Settings (L.P.)
G S
CONTROL
KNOB
INDEX
B R
130° F
B R
120° F
B R
130° F
B R
CAUTION
O N
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BEFORE LIGHTING
WARNING
READ ALL INSTRUCTIONS
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This may have a
yellow tint
Yellow inner
cones are
satisfactory
Incorrect flame
lazy yellow
Correct flame
soft blue
Figure 16: Flame Characteristics
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A thermocoup e is used to determine if a pi ot f ame is
present and wi shut off the gas supp y to the main burner
and the pi ot burner if the f ame is absent.
A high temperature imit switch or ECO (Energy Cut Off)
in the tank is used to shut off the unit if the water
temperature exceeds 180°F (83°C). The ECO is a sing e
use switch and requires comp ete rep acement of the
entire thermostat. If the ECO shou d function, the water
heater cannot be used unti the thermostat is rep aced
by a qua ified service agency. Contact your oca dea er
for service information.
node Rod/Water Odor
Each water heater contains at east one anode rod, which
wi s ow y dep ete whi e protecting the g ass- ined tank
from corrosion and pro onging the ife of the water heater.
Certain water conditions wi cause a reaction between
this rod and the water. Once the anode is dep eted, the
tank wi start to corrode, eventua y deve oping a eak.
The most common comp aint associated with the anode
rod is a rotten egg sme  produced from the presence
of hydrogen su fide gas disso ved in the water. Do not
remove this rod permanent y as it wi void any warranties,
stated or imp ied. The parts ist inc udes a specia anode
that can be ordered if water odor or disco oration occurs.
This rod may reduce but not e iminate water odor
prob ems. The water supp y system may require specia
fi tration equipment from a water conditioning company
to successfu y e iminate a water odor prob ems.
Artificia y softened water is exceeding y corrosive because
the process substitutes sodium ions for magnesium and
ca cium ions. The use of a water softener may decrease
the ife of the water heater tank.
The anode rod shou d be removed from the water heater
tank every 3 years for inspection. If the rod is more than
50% dep eted, the anode rod shou d be rep aced.
In rep acing the anode:
1. Turn off gas supp y to the water heater.
2. Shut off the water supp y and open a nearby hot
water faucet to depressurize the water tank.
3. Drain approximate y 5 ga ons of water from tank
(Refer to Draining and F ushing for proper
procedures). C ose drain va ve.
4. Remove o d anode rod.
5. Use Tef on® tape or approved pipe sea ant on threads
and insta new anode rod.
6. Turn on water supp y and open nearby hot water
faucet to purge air from water system.
7. Restart the water heater as directed under Operating
Your Water Heater. See the "Repair Parts I ustration"
for anode rod ocation on page 27.
20
Operational Conditions
Condensation
Moisture from the products of combustion condenses
on the tank surface and the outside jacket of the water
heater and forms drops of water which may fa onto
the burner or other hot surfaces. This wi produce a
sizz ing or frying noise. This condensation is normal
and should not be confused with a leaking tank.
Condensation may increase or decrease at different
times of the year.
High efficient energy saver water heaters wi produce
arger amounts of condensation on initia start up or
when a arge amount of hot water is being used. Do
not confuse this with a tank leak. Once the water
reaches a temperature of 120°F and the tank warms
up (usua y 1-2 hours), the condensation wi stop.
Important: It is a ways recommended that a suitab e
drain pan be insta ed under the water heater to protect
the area from water damage resu ting from norma
condensation production or a eaking tank or piping
connections. Refer to the Location Requirements on
page 4-5. Under no circumstances is the manufacturer
to be he d responsib e for any water damage in
connection with this water heater.
Water Heater Sounds
During the norma operation of the water heater, sounds
or noises may be heard. These noises are common
and may resu t from the fo owing:
1. Norma expansion and contraction of meta parts
during periods of heat-up and coo -down.
2. Condensation causes sizz ing and popping within
the burner area and shou d be considered norma .
3. Sediment bui dup in the tank bottom wi create
varying amounts of noise and may cause
premature tank fai ure. Drain and f ush the tank
as directed under Draining and F ushing.
Smoke/Odor
The water heater may give off a sma amount of smoke
and odor during the initia start-up of the unit. This is
due to the burning off of oi from the meta parts of a
new unit and wi disappear after a few minutes of
operation.
Safety Shut-off
This water heater is designed to automatica y shut-off
in the event of the fo owing:
1. The pi ot f ame is extinguished for any reason.
2. The water temperature exceeds 180°F (83°C).