Bosch AQUASTAR 125B LPL operati User manual

WARNING: Improper installation,
adjustment, alteration, service or maintenance can
causeinjuryorpropertydamage.Refertothismanual.
For assistance or additional information consult a
qualified installer, service agency or the gas supplier.
Uponcompletionoftheinstallation,theseinstructions
should be handed to the user of the appliance for
future reference.
In the Commonwealth of Massachusetts this product
must be installed by a licensed plumber.
Warning: If you do not follow these instructions exactly, a
fire or explosion may result causing property damage,
personal injury or loss of life.
INSTALLATION AND OPERATING INSTRUCTIONS FOR AUTOMATIC
INSTANTANEOUS TYPE WATER HEATERS FOR USE WITH NATURAL AND
LIQUEFIED PETROLEUM GAS
WARNING
If the information in this manual is not followed
exactly, a fireorexplosionmayresultcausingproperty
damage, personal injury or death.
FOR YOUR SAFETY
Do not store or use gasoline or other flammable,
combustible or corrosive vapors and liquids in the
vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
-Do not try to light any appliance.
-Do not touch any electrical switch; do not use any
phone in your building.
-Immediatelycallyourgassupplierfromaneighbor’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
qualifiedinstaller, service agency or thegassupplier.
Specifications .................................................... Page 2
Rulesforsafeoperation...................................... Page4
Locating theHeater ............................................ Page 5
CombustionAirRequirements ............................ Page5
MountingtheHeater........................................... Page6
Ventingthe Heater ............................................. Page6
GasConnections ............................................... Page7
WaterConnections ............................................ Page 9
Safetybefore lighting thepilot .......................... Page 10
Lightinginstructions ......................................... Page10
AboutWaterTemperature ................................ Page 10
Maintenance&Service..................................... Page10
TroubleShooting ...............................................Page11
DiagramofAquaStar......................................... Page15
Componentsand Parts List.............................. Page16
TABLE OF CONTENTS
6 720 606 522 (02.01) AL
MODEL 125B LPL and 125B NGL (Non-Modulated)
Suitable for heating potable water
Certified for space heating in combination with potable water only
Not certified for space heating only.
Intended for either recirculation to storage or cold water inlet flow that is non-varying.

2
This well engineered, gas water heater has been
specially designed to operate as a circulating water
heater.
FEATURES
- High Quality Materials for Long Working Life.
- Copper heating coils for endless supply of hot water.
- Safety thermocouple at pilot burner.
- Automatic overheating protection shut-off sensor.
- Stainless steel burners with stabilized blue flame.
- Built-in corrosion resistant draft inducer.
- Compactspacesaver:mountsonawallwithtwohooks.
- Easily removable one-piece cover.
- Easy one person installation.
- Easypilotflame lighting withpushbutton piezo ignition.
BOSCHisconstantly improvingourproducts,therefore
specifications are subject to change without prior
notice.
AquaStar 125B LPL and 125B NGL Specifications
GasInput max.:117,000 Btu/hr
min.: 60,000 Btu/hr
WaterConnection1/2” Thread fitting NPT
H x W x D 29 3/4” x 18 1/4” x 8 3/4"
Vent 5”
GasConnection1/2”NPT thread
Min. Water Pressure 8 Psi at 1.8 GPM
Min. Water Pressure 18 Psi at 3.7 GPM
Max. Water Pressure 150 Psi
Shipping Weight 46 LB
Net Weight 44 LB
1.8 GPM at 90° rise
3.7 GPM at 45° rise
Min. Water Flow 1.8 gal/min
LP GAS Supply Pressure
(beforeAquastarregulator) min.: 11” W.C.
max.: 14”W.C.*
Required LP GAS Pressure at inlet
tapwhileAquastarisoperating: 10.5” W.C.
LPGASBurnerManifoldpressure whileAquastar
is operating at maximum input: 9.0” W.C.
NaturalGas Supply Pressure
(beforeAquastarregulator) min.: 7” W.C.
max.: 14” W.C.*
RequiredNatural Gas Pressure at inlet
tap whileAquastaris operating: 5.7” W.C.
NaturalGasBurnerManifold pressure whileAquastar
is operating at maximum input: 4.2” W.C.
* Inlet gas pressure before Aquastar regulator must not
exceed this value. Pressure may need to be adjusted for
high altitudes, see page 8.
UNPACKING THE AQUASTAR HEATER
Thisheaterispackedsecurely.Theboxincludestwowaterconnectionfittings,agaspressureregulator, a pressure relief
valve,anincandescentparticletray, two hooks forhangingthe heater,thismanual,a warranty statementanda warranty
registration card. Do not lose this manual, as there is a charge for replacement. Please complete and return the
enclosedwarrantyregistration card.

3
D861_059
MINIMUMINSTALLATIONCLEARANCES FROMCOMBUSTIBLEAND NON
COMBUSTIBLE MATERIALS FOR ALCOVE OR CLOSET INSTALLATIONS
FRONT VIEW SIDE VIEW
AQUASTAR MODEL 125BL
* Some local codes require 18” in garage installations
MODEL 125BL
TOP (A) 12 "
FRONT (B) 4 "
BACK 0 "
SIDES 4 "
FLOOR (C) 12 " *
VENT DIAMETER 5 "

4
If you are using the AquaStar for combined space heating and potable water heating (see
schematic diagram below), all piping and other components connected to the system must
be suitable for potable water, (b) toxic chemicals such as those commonly used for boiler
treatment to prevent corrosion and freezing must not be introduced into the system, and
(c) if the space heating requires water temperatures higher than those required for do-
mestic, potable water, a mixing valve or other similar device must be provided to reduce
scald hazard potential, (d) maximum system water temperature must not exceed 140°F
(60°C). DO NOT CONVERT AN EXISTING, CLOSED HOT WATER HEATING SYSTEM TO A
COMBINATION SPACE AND POTABLE WATER HEATING SYSTEM USING THE AQUASTAR
OR ANY OTHER HEAT SOURCE.
Open loop potable water and combination space heating system*
* To be used with a tank, check local codes. May not be permitted in some jurisdictions.
GENERAL RULES TO FOLLOW
FOR SAFE OPERATION
1. You should follow these instructions when you install
your heater. In the United States: The installation must
conformwithlocal codes or,in the absence oflocalcodes,
theNational Fuel Gas CodeANSIZ223.1/NFPA54.
In Canada: The Installation should conform with CGA
B149.(1,2)INSTALLATIONCODESand/orlocalinstallation
codes.
2. Carefully plan where you install the heater. Correct
combustion air supply and flue pipe installation are very
important. If not installed correctly, fatal accidents can be
caused by lack of air, carbon monoxide poisoning or fire.
3. Theplacewhereyouinstalltheheatermusthaveenough
ventilation.The National Fire Codesdo not allowgas fired
water heater installation in bathrooms, bedrooms or any
occupiedroomsnormallykeptclosed.Seethesectionbelow
onlocating the heater.
4. You must vent your heater. See section on VENTING,
Page6.
5. Theappliancemustbedisconnectedfromthegassupply
pipingsystem during any pressure testing at pressures in
excess of 1/2 Psig (3.5 kPa).
Theappliancemustbe isolated from thegassupply piping
systembyclosingitsindividualmanualshutoffvalveduring
any pressure testing of the gas supply piping system at
test pressures equal to or more than 1/2 Psig (3.5kPa).
Theappliance and its gas connection must be leak tested
beforeplacingthe appliance in operation.
6. Keepwaterheaterareaclearandfreefromcombustibles
and flammable liquids. Do not locate the heater over any
materialwhich might burn.
*Pipe PRV to appropriate discharge
**Tempering valve is required when tank water temperature is over
130 F.
Notes
1. Maximum to tank water temperature from 125 BL 140°F
2. Maximum heating capacity: 40°F rise 20°F rise
AquaStar 125BL - 80,000 BTU/hr 40,000 BTU/hr
3. System shown is electric storage tank with recirculating supply
drawn from the tapping for the lower heating element.
4. If circulation flow to the Aquastar 125BL is restricted, it may be
necessary to adjust the temperature slide control to prevent
overheating.
5. Schematic is for illustration and example only and must not be used
for actual installation without appropriate engineering and technical
advice from a professional properly licensed in the locality where
the installation is made.

5
7. Correct gas pressure is critical for the optimum
operationofthisheater(seespecificationsonpage2).Gas
piping must be sized to provide the required pressure at
the maximum output of the heater, while all the other gas
appliances are in operation. Check with your local gas
supplier,andseethesectiononconnectingthegassupply.
8. Shouldoverheating occur orthe gas supply fail toshut
off,turnoff the gassupplyat the manualgasshut off valve
on the gas line.
9. Do not use this appliance if any part has been
underwater. Immediatelycallaqualifiedservicetechnician
to inspect the appliance and to replace any part of the
control system and any gas control which has been
underwater.
PROPER LOCATION FOR INSTALLING
YOUR HEATER
Carefully select the location of your new heater. For your
safetyandforproperheateroperation, you mustprovidean
abundant supply of combustion air and a proper venting
installation.
Theheatermaystilloperateevenwhenimproperlyvented.
Itwill,however,belessefficientandcouldeventuallydamage
theheater. It could evenresultin human sickness ordeath
duetooxygendeprivationandcarbon monoxidepoisoning.
Followtheguidelines below:
1. Place your heater as close to a vent or chimney as
possible.
2. National building codes require that you do not install
thisapplianceinbathrooms,bedrooms,unventedclosetor
any occupied rooms normally kept closed.
3. Simultaneous operation of other appliances such as
exhaustfans,ventilationsystemsclothesdryers,fireplaces
orwoodstoves couldcreateavacuumeffectinyourhome
which could cause dangerous combustion by-products to
spillbackintoyour home rather than ventingtothe outside
through the flue. Confirm that your Aquastar is venting
properlywhenall these otherappliances are running. See
sectiononventing.
Donotobstructtheflowofcombustionandventilation
air to the appliance. If installed near a clothes dryer it is
veryimportantthatthe dryer be properlyvented. Failure to
properlyventadryercouldresultinagradualaccumulation
oflintonthewaterheaterfincoilsandburners, leading to a
dangerous condition of vent blockage and poor unsafe
combustion.
4. Yourhotwaterlinesshouldbe keptshorttosaveenergy.
It is always best to have hot water lines insulated.
Thisproduct is not approved for manufactured homes
(mobile home), recreational vehicles (RV) or boats.
Reference ANSI Z21.10.3.
This product is neither designed or approved for
outside installations.
WARNING: The water in this water heater is cold
and always remains cold except for the times that hot
water is being used DO NOT INSTALL IN AN AREA
WHEREITCOULDFREEZE.
This heater is neither designed for nor approved for
outside installation.
Drain the heater entirely if freezing temperatures are
anticipated in area where heater is installed by
disconnectingboth theinlet andoutlet elbowconnections
at the rear of heater. Additionally remove the drain plug
underthe water valve. SeeFig 0.
WARNING: Flammable materials, gasoline,
pressurized containers, or any other items or articles
that are potentially fire hazards must NOT be placed
on or adjacent to the heater. The appliance area must
be kept free of all combustible materials, gasoline
and other flammable vapors and liquids.
COMBUSTION AIR REQUIREMENTS
TheAquaStar water heater holds cold water in its copper
heat exchanger and brass water valve when not in use.
Because of this, any cold air that comes in through the
unit’s vent pipe is capable of freezing these components.
ThisInstallationManualspecifiesthe minimumverticalvent
pipe and the amount of combustion air required for this
unit. The vent pipe must not be restricted and its 6 foot
minimum height (provided there are no elbows) must
terminate 2 feet above any obstruction within a 10 foot
radius.
When all requirements are followed, the unit will operate
properly and safely. However, there may still be a risk of
freezingduetonegativedraftifallthecombustionappliances
inthe area arenot being supplied with a sufficient amount
ofmake-upair. Awoodstoveor furnace can rob the make-
upairintheAquaStar’sventpipe, leavingthecoldinfiltrating
aircapable of freezingthe cold waterin theAquaStarheat
exchanger. More make up air is the solution. Follow the
instructionsonventingandcheckingadequacyofmakeup
air. AHVAC specialist should be used to design solutions
forprovidingmoremake-up air if necessary.
Observethefollowinginstructions concerning combustion
air.
Applianceslocated in unconfinedspaces:
a) An unconfined space is one whose volume is greater
than50cubicfeetper1000 Btu perhourofthecombined
ratingofallappliancesinstalledinthespace.Thatwould
be5850 cubic feetfor theAquaStar125BLalone.
b) Inunconfinedspacesinbuildingsofconventionalframe,
masonry, or metal construction, infiltration is normally
adequatetoprovideair for combustion, ventilation, and
Fig. 0 - Water heater drain plug

6
dilutionof flue gases.
Applianceslocated in confined spaces:
Theconfinedspace must be providedwith two permanent
openings,onecommencingwithin12inchesofthetopand
one commencing within 12 inches of the bottom of the
enclosure.Each openingmust havea minimumfree area
ofone square inchper:
- 1000 Btu/hr if all air is taken from inside the building.
- 2000Btu/hrifallairis takenfromtheoutsidebyhorizontal
ducts.
- 4000 Btu/hr if all air is taken from the outside by direct
openingsor vertical ducts.
Ortheconfinedspacemustbeprovidedwithonepermanent
openingorduct that iswithin 12 inches of theceiling of the
enclosure.Thisopeningmusthaveaminimumfreeareaof
onesquare inch per:
- 3000 Btu/hr if all air is taken from the outside by a direct
openingorvertical duct.
Louvers, grills and screens have a blocking effect. If the
effectivefreearea is notknown, increase the sizesof your
openings by 75% if your louvers are wood and by 30% if
yourlouversaremetal. RefertotheNationalFuelGas Code
forcomplete information. In buildings oftight construction
all air should be taken from outside.
CLEARANCES
TheAquastar125BLis design certifiedforinstallationona
combustible wall and for installation in an alcove or closet
with the minimum clearances to combustible and non -
combustibleconstruction listed below
A. Top 12 inches (306 mm)
B. Front 4 inches (102 mm)
C. Back 0 inches
D. Sides 4 inches (102mm)
E. Bottom 12 inches (306 mm)
Clearancefromventisdependentupontheclearancerating
oftheventing material used. For example:typeB-1 vent is
approvedfor1inchclearance.
Note:Minimumclearancetocombustiblematerialsshould
not be less than 6" for single wall flue pipe. Note that this
clearance can be reduced if combustible material are
protectedaspertableVIoftheNationalfuelGasCodeorif
Type B gas vent is used.
MOUNTING INSTALLATION
TheAquastar 125 BLis design certified for mounting on a
wall. Secure the two L shaped hooks provided with the
heater to a wall surface. Place them 13 ¼ inches apart as
shown in Fig 1.
Donotinstallthisapplianceonacarpetedwalloroverfloor
coveringwhichis combustible, such ascarpet.The heater
must be mounted on a wall using appropriate anchoring
materials.Ifwall is a studwall sheathed with plasterboard,
it is recommended that support board(s), either 1x4’s
or 1/2" (minimum) plywood first be attached across a
pair of studs and then the heater should be attached
to the support boards. See Fig 1.
Expansionandcontractionofpipingduetochangingwater
temperaturein the pipesimparts movement tothe heater
Fig. 1 - Mounting the Heater
Fig. 2 - Incandescent Particle Tray Illustration
VENTING
Vent pipe connection.WARNING: Do not reduce
the vent pipe size.
This appliance must be vented to the outside following all
local ordinances and specifications for installing a gas
appliance vent or chimney. The venting system must be
designedand constructed so as to develop a positive flow
adequatetoremovefluegassestotheoutdoors.Minimum
vent size must be 5". Minimum height must be 6 feet,
provided there are no elbows. Termination of vent
must be 2 feet above any obstruction within a 10 foot
radius. Consult your gas utility or National Gas Fuel
Theincandescentparticletray(shippedlooseinthecarton
with the water heater) must be attached at the bottom of
thewater heater frontcover at thetime of installation.Use
thescrewsprovided. Seefigure2
SCREWS
INCANDESCENT PARTICLE TRAY
WALL STUDS
1” X 4”
SPACE BOARD
SUPPORT BOARD
13 ¼”
which, if mounted directly to a brittle, friable board, such
asplasterboard, can cause failureof mounting.
In earthquake-prone zones, CEC recommends that
installers use a large washer and lag screw through the
existing holes used to hang the heater to affix the upper
thirdofthe heater to themounting board.Toaffixthelower
third of the heater, CEC recommends that two new holes
bedrilled in theheater’s frame, each one 16 inches below
the top two holes, and that washers and lag screws be
usedtosecure the lowerportion of the heaterto a spacing
board.
Before installing the unit, be certain you have the correct
heater for your type of Gas – Propane or Natural Gas.
Identification labels arefoundonthe shipping box,and on
the rating plate which is located on the right side panel of
thecover.Also,eachburnerorificeisstampedwithanumber
(79for LPG and 120for Natural Gas).

7
Fig. 3 - Vent Adaptor for High Altitude Canadian
Installations
WARNING:FailureTOINCREASETHEVENTSIZE
TOSIXINCHESAND/or assure that the manifold pressure
issettopropervaluelistedforapplicationsathighaltitudes
willcause unsafe venting, asphyxiation,and will void CSA
Certification.
GAS CONNECTIONS and Gas Regulator
NOTE: The Aquastar 125 BL is supplied with a gas
pressureregulatorthatmustbeinstalledontheheater
before attaching the gas supply line. See figure 4.
Failure to install the gas regulator as shown in figure
4 will be a violation of CSA certification of the unit.
The regulator supplied with the heater is preset for
the gas shown on the rating plate to the correct
pressure. It is an appliance level regulator designed
for (low inlet) pressure (less than 1/2 Psig or 15” W.C.)
DO NOT connect to an unregulated or high pressure
propane line or to a high pressure commercial natural
gas line.
Fig. 4 - Installation of Gas Pressure Regulator
5” X 6” ADAPTOR
USED ON HIGH ALTITUDE
Code if vent will have elbows or share venting with
another appliance.
The vent connector should have as much vertical rise
as possible (minimum 12”) before any horizontal run.
Optional powervent available in order to sidewall vent.
Contact your local dealer. The appliance must be located
ascloseaspracticableto a chimney or vent.Theventpipe
sections must be secured to each other with sheet metal
screws.Keepin mind the minimumclearancefrom the top
of your heater. Remember also that single wall vent pipe
connectorsrequire a 6inch clearance from combustibles.
NationalFuel Gas Code specifies double wall —Type “B”
— vent pipe be used in cold climates and for gas vents
runningthrough attics. We consider double wall vent pipe
preferable in all circumstances. Any vent section greater
than 45 degrees from vertical is considered horizontal.
Horizontalsectionsofventconnectorsmustslopeupwards
atleast1/4inch for every foot ofitshorizontallength. Keep
the horizontal section short and avoid too many elbows.
Optional power vent available in order to sidewall vent.
Contactyour local dealer.
To check the draft:
Close all doors and windows to the outside.
Turn on all appliances that force air out of the building.
Theseincludeallexhaust/ventilation fans,furnaces,clothes
dryers,wood burning stoves,etc.
Openall doors betweentheAquaStarand these otherap-
pliances.
Runtheunit for atleast 10 minutes. Thenhold an ordinary
mirror at the side above the front shell. Any flue gases
backdrafting will cause the mirror to fog. This is a serious
health hazard and must be corrected. Poor venting can
result in soot building up inside the heater, overheating of
theheaterandfreezingof the heat exchanger in afreezing
environment.
Themirrorwillremainclear withaproperlyfunctioningdraft.
WARNING
Note: Theburnersofaninstantaneous“ondemand”water
heater such as the AquaStar are only on at the time that
hotwater is actually being used,the vent pipe is therefore
coldexceptfor the short durations whenhotwater is being
used,itis therefore very importantthat the venting and air
supplybeadequatetoprovidea goodpositivedraftassoon
asthe burners turn on. See venting guide on back page.
TheAquaStar125BLinstantaneouswaterheatershavebuilt-
in draft diverters and are designed for indoor installation
only.Thedraftdiverteroutletmustbeconnectedtoaclear,
unobstructedvent of thesame size, or larger.
InCanada,CAN/CGA-B149InstallationCodefordetailed
requirements
In U.S.A., ANSI Z223.1 - NFPA 54, national Fuel Gas
Codefordetailedrequirements.
The vent connection for the AquaStar 125BL is 5 inches.
However,inCANADA,forinstallationsathighaltitude(2000-
4500 feet above sea level) a six inch flue is required.A5"
by 6" flue adaptor must be affixed to the flue collar of the
AquaStar with at least two screws. See figure 3.
GAS INLET PIPE
PRESSURE TAP
PRESSUREREGULATOR
(with directional arrow on
reverse side pointing
upward)
PLASTICVENTCAP
Thepressureregulatorprovidedwiththeheaterisadjusted
todeliverthepropergaspressure(asindicatedon therating
plate and in the manual for altitude up to 2000 feet (660
meters) above sea level. On appliances being installed
above2000ft(660meters)elevation, theinletgaspressure
should be set at installation to the value shown below.

8
GAS PIPING, CONNECTIONS and Gas Regulator
Before connecting the gas supply, check the rating plate on the right side of the front cover to be sure that the heater is
rated for the same gas to which it will be connected.
In the United States: The installation must conform with local codes or, in the absence of local codes, the National Fuel
GasCodeANSIZ223.1/NFPA54.
InCanada:TheInstallationshouldconform with CGAB149 INSTALLATION CODES and/orlocal installation codes.
FOR NATURAL GAS
Maximum Capacity of pipe in Cubic Feet of Gas per Hour
forGasPressureof0.5PsigorlessandaPressuredropof
0.3 in Water Column.
FollowboxednumbersforpipingjustoneAquastar125BL
(example: 3/4” B.I. Natural Gas pipe for 30 ft. will handle
152,000btu’s).For multiple appliances combine thetotal
btuinput load andthen refer to applicable chart below.
(Basedona0.60Specific GravityGas)Btunumbers given
inthousands.
FOR LP GAS
MaximumCapacityof Pipe inThousands of BTU
per Hour of Undiluted Petroleum Gases (at 11
inches Water Column Inlet Pressure) (Based on
aPressure Drop of0.5 Inch Water Column).
MaximumCapacity of Semi-Rigid
TubinginThousandsofBTUperHourofUndiluted
Liquified Petroleum Gases (at 11 inches Water
ColumnInletPressure)
(Based on a Pressure Drop of 0.5 Inch Water
Column)
* Source National Fuel Gas Code NFPA 54, ANSI Z223.1 - No
AdditionalAllowanceisnecessaryforanordinary numberoffittings
GAS LINE SIZING
Copper
Outside Length of Tubing, Feet
Diameter,
Inch 10 20 30 40 50 60 70 80 90 100
3/8 39 26 21 19 _ _____
1/2 9262 50 41 37 3531292726
5/8 199 131 107 90 79 72 67 62 59 55
3/4 329 216 181 145 131 121 112 104 95 90
7/8 501 346 277 233 198 187 164 155 146 138
Nominal
Iron Length of Black Iron Pipe, Feet
Pipe Internal
Size, Diameter
inches inches 10 20 30 40 50 60 70 80 90 100 125 150 175 200
1/4 0.364 32 22 18 15 14 12 11 11 10 9 8 8 7 6
3/8 0.493 72 49 40 34 30 27 25 23 22 21 18 17 15 14
1/2 0.622 132 92 73 63 56 50 46 43 40 38 34 31 28 26
3/4 0.824 278 190 152 130 115 105 96 90 84 79 72 64 59 55
1 1.049 520 350 285 245 215 195 180 170 160 150 130 120 110 100
1 1/4 1.380 1050 730 590 500 440 400 370 350 320 305 275 250 225 210
1 1/2 1.610 1600 1100 890 760 670 610 560 530 490 460 410 380 350 320
2 2.067 3050 2100 1650 1450 1270 1150 1050 990 930 870 780 710 650 610
2 1/2 2.469 4800 3300 2700 2300 2000 1850 1700 1600 1500 1400 1250 1130 1050 980
3 3.068 8500 5900 4700 4100 3600 3250 3000 2800 2600 2500 2200 2000 1850 1700
4 4.026 17,500 12,000 9,700 8,300 7,400 6,80 6,200 5,800 5,400 5,100 4,500 4,100 3,800 3500
Nominal
Iron P ipe Black Iron Pipe
Size, Length of Pipe, Feet
Inches 10 20 30 40 50 60 70 80 90 100 125 150
1/2 275 189 152 129 114 103 96 89 83 78 69 63
3/4 567 693 315 267 237 217 196 185 173 162 146 132
1 107 732 590 504 448 409 378 346 322 307 275 252
1 1/4 220 149 121 103 913 834 771 724 677 630 567 511
1 1/2 330 229 185 155 141 127 118 108 102 976 866 787
2 622 433 346 299 264 239 220 204 192 1811 1606 1496
Copper
Outside Length of Tubing, Feet
Diameter,
Inch 10 20 30 40 50 60 70 80 90 100
3/8 39 26 21 19 _ _____
1/2 9262 5041 37 3531292726
5/8 199 131 107 90 79 72 67 62 59 55
3/4 329 216 181 145 131 121 112 104 95 90
7/8 501 346 277 233 198 187 164 155 146 138

9
THREADEDASSEMBLY SWEATEDASSEMBLY
1/2”FLEX
PIPEPRV TO
APPROPRIATE
DISCHARGE
S FITTING
PIPEPRV TO
APPROPRIATE
DISCHARGE
1/2”FLEX
Fig. 6-Plumbing connections for the Aquastar 125BL
NOTE: Do not apply soap solution to pilot filter screen or
pilot orifice area. If you have a leak, shut off the gas.After
verifying that required gaskets are in place, tighten
appropriatefittingstostopleak.Turnthe gas on and check
againwithasoapysolution.Nevertestforgasleaks using
a match or flame.
WATER CONNECTIONS
Whenfacingtheheater, the coldwaterinletis on your right
and the hot water outlet is on your left.
Although water piping throughout your structure may be
other than copper, we recommend that copper piping be
usedforatleastthreefeetbeforeandaftertheheater(follow
local codes if more stringent). Keep water inlet pipe to no
less than 1/2 inch diameter to allow the full flow capacity.
Rememberthatwaterpressuremustbe sufficienttoactivate
theheaterwhen drawing hot waterfromthe top floor.Ifthe
hot and cold connections to the heater are reversed, the
heater will not function. The AquaStar 125BL is provided
with two flexible type connectors that must be connected
totheinletandoutlet fittings of the water valveasshownin
Figs 5 and 6. ½” Copper or brass fittings work best when
connectedtotheconnectors.SeeFig6.These connectors
seal to the water valve by means of a union connection
with a washer type gasket at the joint. No pipe dope or
thread tape is to be used at these joints. Be certain there
arenoloose particles or dirtin the piping. Blowoutor flush
thelinesbeforeconnectingtotheAquaStar. Full port valves
shouldbeinstalledonboththe cold water feed line andthe
hot water outlet line to facilitate servicing the heater.
For installation on a private well system, be sure that the
water pressure is set between 30 and 50 psi.
Above 4.500 ft consult your local gas supplier.
Altitude Natural Gas Liquid Propane
inches W.C: inches W.C:
0' - 2.000 ft 5.7" 10.5"
2.000 ft - 4.500 ft 4.6" 8.4"
NOTE: The gas pressures specified below refer to
pressures taken at the pressure tap on the gas inlet
pipe just above the regulator (See Fig 4). These
readings should be taken while the heater is operating
at full input — i.e. with the gas control positioned all
the way to the right.
MAXIMUM INLET GAS FLOW PRESSURE SETTING
GAS LINE SIZING
-It is strongly recommended that the Natural Gas pipe
be Black Iron pipe the entire distance from the outside
meter to the inlet of theAquastar regulator. 1/2” Black
Iron pipe up to 10 feet, 3/4” Black Iron pipe up to 40
feet and 1” Black Iron pipe up to 150 feet distances.
Flex line tubing is NOT recommended, but if used
then oversize it.
-It is strongly recommended that the LP Gas pipe be
semi-rigid copper or Black Iron pipe from the outside
regulator to the inlet of the Aquastar regulator. For
semi-rigid copper piping: 5/8” up to 20 feet and 3/4”
up to 60 feet distances. For Black Iron piping: 1/2” up
to 45 feet and 3/4” up to 160 feet distances. Flex line
tubingisNOTrecommended,butifusedthenoversize
it.
THESEFIGURESAREFORAQUASTAR SUPPLYONLY,
ALLOTHERAPPLIANCESINTHEBUILDINGWILLNEED
TO BE INCLUDED IN THE PIPE SIZING.
NationalFuelGasCoderequiresthatasediment trap (drip
leg) be installed on gas appliances not so equipped. The
drip leg must be accessible and not subject to freezing
conditions.Installinaccordancewiththe recommendations
oftheserving gas supplier.
WARNING:Theheatermustbedisconnected from
the gas supply piping system during any pressure testing
of that system at test pressures in excess of 0.5 psig.
The water heater must be isolated from the gas supply
piping system by closing the manual shutoff valve during
any pressure testing of the gas supply piping system at
test pressures equal to or more than 0.5 psig.
Thewaterheater,includingthepressureregulatorprovided
with it, must not be operated at gas supply pressures in
excess of 0.5 psig. If overpressure has occurred, such as
throughimproper testing ofthe gas linesor malfunction of
the supply system, the gas valve and regulator must be
checked for safe operation. Make sure that the regulator
ventis protected againstblockage.
When your connections are made, check for gas leaks at
all joints (not just the ones you made).Apply some soapy
water to all gas fittings and gas valve. Soap bubbles are
a sign of a leak.
Fig. 5 - Water valve and water
connectors, top view
WASHER
WATER FILTER
WATER VALVE
WASHER
FLEX
CONNECTORS

10
Fig. 7 - Pressure Relief Valve
Connecting the pressure relief valve (PRV)
Alistedpressure relief valve supplied withtheheater must
be installed at the time of installation. No valve is to be
placed between the PRV and the heater. No reducing
couplingorotherrestrictionmaybeinstalledinthedischarge
line.
The discharge line must be installed such that it allows
complete drainage of both the PRV and the line.
The location of the PRV must be readily accessible for
servicingorreplacement., and bemountedas close tothe
water heater as possible. See Fig 7.
To install the PRV, a suitable fitting connected to an
extension on a “T”fitting can be sweated to the hot water
line.
If control button(s) are jammed, close the gas supply and
callaqualifiedservicetechnician.Attemptedforcefulrepair
may result in a fire or explosion.
D. Do not use this appliance if any part has been under
water.
Immediately call a qualified service technician to inspect
theapplianceandtoreplace any part of the controlsystem
andany gas control which has been under water.
LIGHTING INSTRUCTIONS (as seen on front
cover of heater)
1. STOP!Readthe safety informationaboveon this plate.
2. Thegasvalve must be turnedoff by depressing thegas
valve off button ( ).
3. Wait five (5) minutes to clear out any gas. If you smell
gas, STOP! Follow “B”in the safety information above
on this plate. If you don’t smell gas, go to the next step.
4. The pilot burner is located behind the peephole in the
front center of the jacket directly below this instruction
plate.
5. Depress PILOT button ( ) and light pilot by pushing
PILOT INGITER button ( ). This may have to be
repeated.
6. Observethe pilot flame throughthe peephole. Thepilot
button ( ) should be held down at least 15 seconds
withpilot burning. When the pilot button is released the
pilot should continue to burn.
- If the gas valve button does not pop up when released,
stopandimmediately call yourservice technician or gas
supplier.
- If pilot does not stay lit, repeat steps 1 through 6.
- Ifpilotwillnot stay lit afterseveraltries, depress the OFF
button ( ), and call your service technician or gas
supplier.
7. When lit, depress the ON button ( ). The heater will
now fire when water is drawn at a rate greater than the
thresholdflowrate.
NOTE: If main burner should fail to ignite, make sure
pilotis burning. If not, repeat lighting steps 1 through 6.
TO TURN OFF GAS TO APPLIANCE
Depress the OFF button ( ) and close the gas supply to
theheater.
INFORMATION ABOUT WATER TEMPERATURE
The AquaStar 125B LPL and 125B NGL water heaters
producea90°Ftemperatureriseat1.8gallonsper minute.
Astheflowrateisincreasedabove1.8,gallonsperminute,
thetemperaturewill decrease.
MAINTENANCE AND SERVICE
(seemaintenance table onback of manual)
Approximatelyonceayear,theAquaStarshouldbechecked
and cleaned. To remove the front cover, first remove the
incandescentparticletray, then unscrewthe central screw
locatedatthebottomofthefrontcover.Pullmaincoverout
OPERATING INSTRUCTIONS
Before proceeding with the operation of the heater make
sure that the system is filled with water.
Open the cold water inlet supply to the heater fully.
Openahotwaterfaucettopermitthewatertofilltheheater
andthepipingandtoeliminate the airtrappedinthesystem
Closethe hot water faucet afterthe water flows freely and
allthe air has escaped fromthe system. The water heater
is now ready to operate.
FOR YOUR SAFETY READ BEFORE
LIGHTING THE PILOT
Warning: If you do not follow these instructions
exactly, a fire or explosion may result causing property
damage,personal injury or loss of life
A. Thisappliance has a piezo-igniter forlighting the pilot
burner. When lighting the pilot, follow these instructions
exactly.
B. BEFORELIGHTINGsmellallaroundtheappliancearea
for gas. Be sure to smell next to the floor because some
gas is heavier than air and will settle on the floor.
WHAT TO DO IF YOU SMELLGAS
- Do not try to light any appliance.
- Do not touch any electric switch; do not use any phone
inyourbuilding
- Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
- If you cannot reach your gas supplier, call the fire
department.
C. Use only your hand to push in or turn the gas control
buttons.Neveruse tools. Ifa button will notpush in, check
to make sure the buttons are being pushed in the proper
sequence. Follow these instructions exactly.

11
To clean the pilot burner and/ or the pilot orifice : Turn
off the gas at the unit. Remove the cover of the heater. To
doso,remove incandescent particletray and unscrew the
centralscrew located at the bottom of the front cover.Pull
main cover out toward you and lift up and out. Pull the air
screen off, wash it and blow any lint off (See Fig 9). The
pilot orifices should also be cleaned or replaced. Do not
enlarge the orifice. Do not use any wire or sharp object
to clean orifices. Natural gas orifices are large enough
thatyou can usually clean them by blowing through them.
LP orifices, on the other hand, are too small to clean and
shouldbe replaced. See#3 in TroubleShooting Section.
Fig. 9 - Pilot burner with air screen/ pilot orifice
Main Burner Flames: The main burner flames should be
blue, with a more intense blue cone in the center core.
Yellowflames could bea sign of wrong size gas orificesor
dirtyburners,or a blockage onthe heat exchangers fins.If
someburners have yellowflames while others have good
flames,itislikelythatdust,lintorspiderwebshavepartially
cloggedtheburnerventuris.Tocleantheburnerscontacta
gasserviceperson
Mineral Scale Build-up: The AquaStars heater, when
operatedatlowertemperaturessettings,donotaccumulate
mineralbuild-up.Ifhowever,theheaterisusedatthehigher
temperature settings and the water has a high mineral
content,periodicdescalingmay benecessary.Theheating
coilsshould be flushed with a descaling solution. Consult
yourdealer or Controlled Energyfor instructions.
TROUBLE SHOOTING (see maintenance table)
Introduction
TheAquaStar125BLburnersareactivatedbyawaterflow
valve. Numerous water related problems can cause this
watervalve to malfunctionsuch as: Insufficient water flow
volume to activate the burners at its minimum flow
requirement; Dirt in the water flow valve causing it to
malfunction;Sedimentbuild-upinfaucetaerators,orshower
heads;Unevenpressuresbetweencoldandhot.(withsingle
lever faucets) Plumbing cross overs. These water flow
relatedproblemscan cause theheaterto deliver lessthan
itsfulloutput,or to failto ignite or toshut down completely.
Problemsarestatedinuppercase,boldface.Mostcommon
causes for the problems follow in order of likelihood. The
suggestedsolutionsrequire that thecover be taken off.To
do this, remove incandescent particle tray and unscrew
the central screw located at the bottom of the front cover.
Pull main cover out toward you and lift up and out.
PILOT LIGHT WILL NOT LIGHT
1. No gas to the AquaStar
A. Gas cock on gas line may not be open.
B. Gas valve button has not been pushed in on “PILOT”
position.
PILOTORIFICE
AIRSCREEN
10mm
3/8”
Piezo
Electrode
Thermocouple
Fig. 8 - Characteristic Pilot Flame
3mm
Correct gap between pilot
burner tip and piezo electrode
tip
PiezoElectrode
Air screen filter
toward you and lift up and out. THE FOLLOWING
OPERATIONS SHOULD BE PERFORMED BY A
QUALIFIEDSERVICEPERSON:
VentSystem:Shouldbecheckedannually.Cleanandrepair
asneeded.
Water Valve(Part#8707002478):Thewatervalveonthis
heatershouldbeservicedperiodically.Lubricatecomponent
#25 on page 14 with a small amount of silicon, faucet or
lithiumgreaseeverytwoyearstokeepits o rings freshand
pushrod sliding smoothly. Every 3-5 years replace
components #25 and #27 on page 14. The frequency will
dependonthe mineral content ofthewater and conditions
of use or whenever signs of corrosion appear at the gas
andwatervalvejoint.Periodicallycheckthatthewaterinlet
filter (#32 on page 14) is clean as well.
Pilot Flame: Thepilotflameshouldburn with acleansharp
blueflameandshouldresemblethe diagram in Fig 8. If the
flameisyellow, or if the pilot knob has to remain depressed
for a long time in order to keep the pilot lighted, the pilot
burnerandorthepilotburnerorificemayneedtobecleaned
(NG), the orifice may need to be replaced(LP), and or the
airscreenmayneedcleaning.Thepilotflameshouldenvelop
approximately10mm (3/8") of thetipof the thermocouple.
Ifitistoo small, the pilotburnermust be cleaned. Toobtain
a spark, the position of the Piezo igniter electrode should
be approximately 3 mm (1/8") from the pilot burner tip.
To access the pilot orifice, remove 2 screws holding pilot
assembly in place. Then loosen compression fittings to
exposepilot orifice.

12
C. Gas regulator maybe shut or damaged.
2. In-line AquaStar gas regulator jammed (usually on
LP gas)
Replace or unlock the regulator. Note: The regulator
furnishedwiththeheater is designed for lowgaspressure.
Excessive pressure will lock it up (propane only).
Locking usually happens if the gas pressure between the
gas tank (propane) and the water heater’s gas regulator
hasnotbeenreduced.Seepage2forrecommendedcorrect
gas pressure. To unlock a regulator, consult your gas
supplier.
3. Pilot orifice clogged and/or air screen dirty, or pilot
gas filter is dirty.
Cloggingofthepilotburnercanbecausedbydustand any
suspended matter contained in the ambient air. Although
thefilterscanlengthenthecleaningintervals,theycannever
completelypreventsuchclogging.Inconsequencethegas
jet issuing from the pilot orifice is reduced and or the air
mixture is reduced. The pilot flame is weak and thus can
nolonger heat the thermocouple sufficiently.For cleaning
purposes, the air filter screen is pulled off, washed and
blown out. The pilot orifice has likewise to be cleaned or
exchanged.Tocleanthepilotconsultagasserviceperson.
4. Air in the Gas Line
Note: Normally this is a problem only at the time of initial
installation,afterthepipeshavebeen worked on, or after a
propanetankhasbeenallowedtoempty,oraftertheheater
has been shut down for a long time.
Bleed all the air trapped in the gas line. Because of the
very small pilot orifice (especially on LP gas models),
bleedingoutalltheaircouldtakeseveralminutes.Depress
the pilot button ( ) until all the air has escaped, and the
gashasarrived.Duringthisprocess, press repeatedely on
the piezo ignition button until the pilot flame has ignited.
PILOTLIGHTSBUT FLAMEGOESOUTWHEN BUTTON
ISRELEASED
1. Pilot push button was not pushed in far enough or
was not held in long enough
Once pilot flame has been lighted. Hold button pushed in
for at least 15 seconds to give time for the pilot flame to
properlyheat the tipof the thermocouple.
2. Pilot flame improperly aimed or is too weak so it
is not properly heating the tip of the thermocouple.
ThePilotflame should be asharp blue flame andaimedat
the tip of the thermocouple so that it envelops 10 mm (3/8
“) of the thermocouple tip. Pilot flame has to be properly
aimed at the thermocouple. See Fig 8.
3. Poor thermocouple connection at the
electromagnet
Note: Electromagnet is part #8707201094 located on the
right side of the gas valve behind the piezo pushbutton
assembly. Check the tightness of the thermocouple
connectionnut at the electromagnet: TheElectro-magnet
connection is a large aluminum 17mm hex head nut. The
thermocouple end is a 5 mm brass nut which screws into
the 17 mm nut.
Tighten the thermocouple nut snugly but not too tight.
4. Poor circuit connections at the ECO. (Energy Cut-
Off overheat protection)
Oxidation or looseness of the ECO terminal connections
canresultinmillivoltcurrentlossthroughthethermocouple
safetycircuit. Clean terminals withvery fine sandpaper or
aneraser and reconnectECO leads.
5. FaultyECO(part#8707206017)
If cleaning the terminals attached to the ECO did not fix
the problem,connectajumperwirebetweenthetwowires
and try to relight the pilot. If the pilot flame now remains
on, replace the ECO. If the flame still goes out when the
button is released, the ECO is not defective. Go to next
step.
6. Faulty thermocouple (part #8747202083) or
electromagnet) Unless these 2 parts are at least 8
to 10 years old, it is very unlikely that they are
faulty.Beforetesting,reconfirm that #2 isabsolutely
correct, and that all connections are clean and
tight.
Totestthethermocouple,disconnectthethermocouplelead
totheECO.Insertamulti-meterprobeintothethermocouple
lead and attach or hold the other lead to the metal gas
valve(DC common). Lightthe pilot flameand hold button,
meterreading should be 24 mVDCor more. If the reading
is24 mVDC or more the thermocouple is good.To test the
electromagnet, re-connect the thermocouple lead to the
ECO, light pilot and hold button while taking a reading
between the ECO leads and the metal gas valve (DC
common).The reading shoulddrop to 19 mVDC or less. If
it does not, replace the electromagnet.
Consult a gas service person to test and change the
thermocouple.
BURNERS DO NOT IGNITE WHEN HOT WATER IS
TURNED ON OR WHEN A CIRCULATOR PUMP IS
OPERATING
1. Pilot is not on.
Light the pilot. See lighting instructions.
2. Gas valve buttonnotpositionedonBurnerPosition
Be sure once the pilot flame is on, that after a 15 to 20
second wait, the main burner button ( ) is pushed all
the way in.
3. Water flow rate at hot water tap is too low.
Note: TheAquaStar models 125BLrequire 1.8 gallon per
minute flow to activate the burners. This is a flow which
would fill a quart jar in 8 seconds.
4 . Cold water inlet filter on heater is dirty.
Removefilter and clean. Thisscreen filter islocated at the
inletside of thebrass water valve(fig 11, #32).Check and
cleanfaucet aerators too.
5. Inadequate pump used on a recirculating loop
If unit is plumbed in a recirculating loop system verify that
the primary circulator pump is sized properly. GF 26-96,
Taco 009 or equivalent isrequired.Seediagramonpage4.

13
WATER IS TOO HOT
1.Gas flow is higher than necessary.
Move gas control slide to the left.
2. Temperature (aquastat) control is set too high
Ifunitisplumbedina recirculatingloopsystemtheaquastat
temperaturerelayfortheprimarycirculatorpumpispossibly
set too high.
WATER IS NOT HOT ENOUGH
1. Water flow rate is too high.
Decreasetheflow rate.
2. Gas flow is not optimal
Move gas control slide to the right.
3. Temperature (aquastat) control is set too low
Ifunitisplumbedina recirculatingloopsystemtheaquastat
temperaturerelayfortheprimarycirculatorpumpispossibly
set too low.
4. Btu input is toolowduetoinsufficientgaspressure
Itisextremelyimportantforatanklessinstantaneous
waterheater to have the right size gas line to obtain
thecorrectgaspressure
See specifications on page 2. Unlike storage tank water
heaters, the burners of a tankless water heater must be
verypowerful to heatwater instantaneously since they do
this only at the time hot water is actually being used. It is
therefore imperativethat the gas pressurerequirement be
met exactly. Insufficient gas pressure will directly affect
the water temperature at the time of usage. See pages 2
for correct gas pressure settings.
5. Btu input is too low due to insufficient gas supply
Make sure your main gas line is fully opened. If using LP
gas, be sure that the size of the propane tank is adequate
tosupply the required gas pressure.
6. Cold water is mixing with the hot water between
the AquaStar and the outlet
ComparewatertemperatureatoutletoftheAquaStar(hold
theAquaStar’soutletpipewithyourhand)andatthetap. If
these two are very different, check for mixing valve or
plumbing crossover (see “MAIN BURNERS WILL NOT
IGNITE...”paragraph#5).
7. Parts in water flow valve are corroded so that the
gas passage is not fully opening
ContactyourservicepersonorControlled Energy.
6. Crossover in household plumbing
TheAquaStarburneractivateswhenthereissufficientwater
pressuredropin theAquaStar water valve assembly—ie.
whenahotwaterfaucetisopened.Ifthereisacrossoverin
theplumbing,thenecessarypressuredropintheAquaStar
will be insufficient, or totally eliminated. A plumbing
crossovercanbecausedby a bad washer at asinglelever
faucet or incorrect plumbing or a mixing valve in the line,
etc. which permits hot and cold water to mix in the
plumbing.Thecrossoverwill create a backpressurein the
system preventing the pressure drop in theAquastar (i.e.
coldwaterisenteringthewaterheater from both sides and
the burners will not come on).
To confirm there is no crossover in the plumbing, shut off
thecoldwatersupplytotheAquaStar. Open yourhotwater
taps.
There should not be any water flowing. If there is water
flowing, there is a crossover in the plumbing. This is a
plumbingproblem,notanAquastarproblem.Pleasecontact
yourplumber.
7. Water valve parts may be dirty or components
damaged.
First check that the venturi is free from dirt particles.
Water valve and component parts must be totally free of
dirt. In hard water areas, mineral deposits can eventually
(3 to 5 years in hard water areas) corrode the water valve
partstoa point wherethey will need replacing. Any sign of
moistureorcorrosionat the joint of thewatervalveandthe
gas valve is a sign that the water valve assembly
componentsneedtobereplaced immediately.
Note: Watervalve for model 125BL is part # 8707002478
for both LP and NG models. (Contact service person to
cleanwatervalve or replace ifcorrosion is present).
PILOT LIGHT GOES OUT DURING OR AFTER USE
1. Gas pressure too low
Very low gas pressure may be caused by low delivered
gas pressure, a jammed gas regulator or undersized gas
lines.If the gas lines are undersized, theremay still bethe
specifiedstaticgaslinepressure.Howeverwhenthewater
valveopens,andgasentersthe burners,thepressurecould
dropsharply,causing the pilotflame to goout. Have a gas
technician confirm the gas pressure both static and at
maximumBtuoutput.Specificationsforyour heater are on
page2.
2. Pilot may be dirty or weak
See Page 9 for instructions on pilot maintenance.
3. Burners are not shutting down immediately when
hot water is turned off or when a circulator pump
has stopped operating
Note: Ifburnersdon’tshutdownimmediatelywhenthehot
water is turned off, the heater will overheat and the ECO
willshut-offthegas.Rebuildthewatervalveassemblyusing
therepair kit fromCEC (part#8 703406 214).
4. Temperature controls are set too high
Ifunit is plumbed ina recirculating loopsystem insure that
theaquastat or relayfor the primary circulator pumpis set
forno hotter than140°F.Thisisnecessary to preventpilot
outage due to overheating. The temperature slide control
on the 125BL may also need to be lowered to prevent
overheating.

14
HOTWATERTEMPERATUREFLUCTUATES
1. Cold water is mixing with the hot water between
the AquaStar and the outlet (if not being used with
a circulator pump)
See#5under“BurnersdoNotIgniteWhenHotWaterTurned
On”.
2. Storage in tank (recirculating system) has not fully
recovered
Storage capacity in tank is inadequate. Increasing tank
size,settingslidecontrol higherforafastrecoveryoradding
asecond 125BL for evena faster recoveryis suggested.
3. Insufficientgas pressure
Noterequiredgaspressures(page2) and consult gas ser-
viceperson.

15
Fig. 10 - Diagram of AquaStar 125 BL
2
4
6
7
1
5
8
10
1. Heatexchanger
2. Pilot assembly
3. Burner manifold gas
pressure test nipple
4. Pilot gas tubing
5. Main gas burner
6. Gas valve
7. Gas control slide
8. Piezo igniter
9. Location of pressure tap
nipple
10. Water valve
11. Gas inlet gas pressure
test nipple
3
11
9

16
Fig. 11 - INTERIOR COMPONENTS DIAGRAM AND PARTS LIST

17
Fig. 11
INTERIOR COMPONENTS DIAGRAM
AND PARTS LIST 125BL
1Cover ¤8 705 421 031
2Cap cover ¤8 703 304 011
3Waterconnection gasket ¤8 710 103 043
4Draft divertor ¤8 705 505 354
5Heat exchanger ¤8 705 406 235
6Hot water pipe ¤8 700 705 431
7Cold water pipe ¤8 700 705 294
8Heat exchanger washer ¤8 710 103 045
9Overheat sensor (ECO) ¤8 707 206 017
10 Main burner assembly LPG 8 708 120 296
Mainburnerassembly NG 8 708 120 298
11 Pilotburner assembly ¤8 708 105 337
11a Pilot filter screen ¤8 700 507 055
12 Piezo electrode ¤8 708 107 002
13 Pilot orifice NG 8 708 200 005
“LPG 8 748 200 173
14 PilotTube ¤8 710 707 166
15 Thermocouple ¤8 747 202 083
16 Burner assembly washer ¤8 710 103 060
17 Throttle disc LPG 8 700 100 174
18 Gasvalve NG 8 707 011 460
Gasvalve LPG 8 707 011 464
19 Gas supply pipe ¤8 700 705 464
20 Electromagnet ¤8 747 201 094
21 Electromagnet washer ¤8 700 103 144
22 Gas filter ¤8 700 507 051
23 Thermocable ¤8 747 202 078
24 Water valve assembly ¤8 707 002 478
25 Water valve repair kit ¤8 703 406 214
26 Water valvediaphragm ¤8 700 503 043
27 Slow ignition valve ¤8 708 503 060
28 Water valve setting screw ¤8 703 404 098
29 O ring setting screw ¤8 700 205 050
30 Water valve piston assembly ¤8 708 500 230
31 Water valve venturi ¤8 708 205 248
32 Water inletfilter ¤8 700 507 059
33 Waterelbow fitting ¤8 700 703 114

18

19

Replacement Parts available from North American
Distributor
CONTROLLED ENERGY CORP.
340 Mad River Park
Waitsfield, Vermont 05673
Phone[phone]
Fax [phone]
www.controlledenergy.com
[e-mail]
VULCANO Termodomésticos S.A.
Estrada de Cacia
3801 - 856 Aveiro - PORTUGAL
GAS LINE SIZE
Natural Gas
Nominal Iron Pipe Size* 1/2" 3/4" 1"
MAXIMUM LENGTH 10' 40' 150'
Liquid Propane
Semi-rigid Tubing 1/2" 5/8" 3/4" 7/8"
MAXIMUM LENGTH NOT
RECOMMENDED 20' 60' 150'
* Flex tubing greatly reduces capacity and, therefore, is not recommended.
Minimum Vent Size* and Height
Minimum Diameter Minimum Height**
5 inches 6 feet**
* NOTE: Vent size must not be restricted. Installation must comply with national fuel gas code venting requirements
for a 117,000 Btu Category I appliance and any applicable local codes.
Water Pressure
For installation on well systems, insure that your water pressure is between 30 - 50 psi.
** NOTE: Minimum vent height must be 6 feet, provided there are no elbows. Termination of the vent must be 2
feet above any obstruction within a 10 foot radius of vent pipe. Consult your gas utility or National Fuel Gas Code
if vent will have elbows or share venting with another appliance. The vent connector should have as much vertical
rise as possible (minimum 12") before any horizontal run.
INSTALLATION CHECKLIST
Recycled paper © 2001 Controlled Energy Corporation,
Waitsfield, VT all rights reserved
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†
YLBMESSATOLIPTCEPSNI
†
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