Lochinvar CLN 075100 User manual

Brand: Lochinvar

Model: CLN 075100

Category: Water heaters & boilers

Type: User manual

This manual is also suitable for

CLN075075

Instruction Manual

PRINTED 0215 325368-001

KEEP THIS MANUAL IN THE POCKET ON HEATER FOR FUTURE REFERENCE

WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED.

ULTRA LOW NOX COMMERCIAL GAS WATER HEATERS

• For Your Safety •

AN ODORANT IS ADDED TO THE GAS USED

BY THIS WATER HEATER.

MODELS CLN075075 / CLN 075100

Series 100

INSTALLATION - OPERATION - SERVICE

- MAINTENANCE - LIMITED WARRANTY

PLACE THESE INSTRUCTIONS ADJACENT TO HEATER AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE.

Read and understand this instruction

manual and the safety messages

herein before installing, operating or

servicing this water heater.

Failure to follow these instructions and

safety messages could result in death

or serious injury.

This manual must remain with the

water heater.

WARNING: If the information in these

instructions is not followed exactly, a fire

or explosion may result causing property

damage, personal injury or death.

Do not store or use gasoline or other

flammable 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.

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.

•

300 Maddox Simpson Parkway

Lebanon, TN 37090

Phone: 615-889-8900 • Fax: 615-547-1000

Technical Service email: 2tech@lochinvar.com

www.Lochinvar.com

LOW LEAD

CONTENT

SAFE INSTALLATION, USE AND SERVICE...................... 3

APPROVALS ...................................................................... 3

GENERAL SAFETY INFORMATION .................................. 4

INTRODUCTION ................................................................ 5

Abbreviations Used ..................................................... 5

 QualiedInstallerorServiceAgency........................... 5

 PreparingfortheNewInstallation ............................... 5

INSTALLATION CONSIDERATIONS ................................. 6

 RoughInDimensions .................................................. 6

Thermometers ............................................................. 7

Facts to Consider About The Location ........................ 7

 HighAltitude ................................................................ 8

Clearances .................................................................. 8

Insulation Blankets ...................................................... 9

Hard Water .................................................................. 9

Circulation Pumps ....................................................... 9

INSTALLATION REQUIREMENTS .................................. 10

Gas Supply Systems ................................................. 10

Gas Pressure Requirements ..................................... 10

 SupplyGasRegulator ............................................... 10

 MixingValves ............................................................ 10

 WaterPiping .............................................................. 11

Closed Water Systems .............................................. 11

Thermal Expansion ................................................... 11

 Temperature-PressureReliefValve ......................... 11

 FillingtheWaterHeater ............................................. 12

Air Requirements....................................................... 12

 UnconnedSpace ..................................................... 13

 ConnedSpace ......................................................... 13

 FreshAirOpeningsforConnedSpaces .................. 13

 OutdoorAirThroughTwoOpenings .......................... 13

 OutdoorAirThroughOneOpening ........................... 13

 OutdoorAirThroughTwoHorizontalDucts ............... 14

 OutdoorAirThroughTwoVerticalDucts ................... 14

Air From Other Indoor Spaces .................................. 14

 Venting ...................................................................... 14

 GasPiping ................................................................. 16

Sediment Traps .........................................................17

LIGHTING & OPERATING INSTRUCTIONS ................... 18

TEMPERATURE REGULATION ...................................... 19

FOR YOUR INFORMATION ............................................. 19

Start Up Conditions ................................................... 19

Operational Conditions .............................................. 20

PERIODIC MAINTENANCE ............................................. 21

 VentingSystemInspection ........................................ 21

Burner Inspection ...................................................... 21

 BurnerCleaning ........................................................ 21

 Housekeeping ........................................................... 21

Anode Rod Inspection ............................................... 22

 Temperature-PressureReliefValveTest ................... 22

RECOMMENDED PROCEDURE FOR PERIODIC

REMOVAL OF LIME DEPOSITS FROM TANK

TYPE COMMERCIAL WATER HEATERS ........................ 22

 DelimingSolvents...................................................... 23

Tank Cleanout Procedure .......................................... 23

 DrainingandFlushing ............................................... 23

Service ...................................................................... 23

LEAKAGE CHECKPOINTS .............................................. 24

TROUBLESHOOTING GUIDELINES ............................... 25

WATER PIPING DIAGRAMS ............................................ 26

NOTES ............................................................................. 32

WARRANTY .....................................................................35

TABLE OF CONTENTS

SAFE INSTALLATION, USE AND SERVICE

Theproperinstallation,useandservicingofthiswaterheaterisextremelyimportanttoyoursafetyandthesafetyofothers.

Manysafety-relatedmessagesandinstructionshavebeenprovidedinthismanualandonyourownwaterheatertowarnyouand

othersofapotentialinjuryhazard.Readandobeyallsafetymessagesandinstructionsthroughoutthismanual.Itisveryimportant

thatthemeaningofeachsafetymessageisunderstoodbyyouandotherswhoinstall,use,orservicethiswaterheater.

Allsafetymessageswillgenerallytellyouaboutthetypeofhazard,whatcanhappenifyoudonotfollowthesafetymessage,and

howtoavoidtheriskofinjury.

TheCaliforniaSafeDrinkingWaterandToxicEnforcementActrequirestheGovernorofCaliforniatopublishalistofsubstances

known totheStateof California to cause cancer,birthdefects, or other reproductive harm, and requires businesses towarnof

potential exposure to such substances.

WARNING: ThisproductcontainsachemicalknowntotheStateofCaliforniatocausecancer,birthdefects,orotherreproductive

harm.ThisappliancecancauselowlevelexposuretosomeofthesubstanceslistedintheAct.

DANGER

WARNING

CAUTION

DANGER indicates an imminently

hazardous situation which, if not avoided,

will result in injury or death.

This is the safety alert symbol. It is used to alert you to

potential personal injury hazards. Obey all safety

messages that follow this symbol to avoid possible

injury or death.

WARNING indicates a potentially hazardous

situation which, if not avoided, could result

in injury or death.

CAUTION indicates a potentially hazardous

situation which, if not avoided, could result in

minor or moderate injury.

CAUTION used without the safety alert

symbol indicates a potentially hazardous

situation which, if not avoided, could result in

property damage.

APPROVALS

LOW LEAD

CONTENT

GENERAL SAFETY INFORMATION

ThankYouforpurchasingthiswaterheater.Properlyinstalledand

maintained,itshouldgiveyouyearsoftroublefreeservice.

ABBREVIATIONS USED

Abbreviations Found In This Instruction Manual:

• UL - Underwriters Laboratories Inc.

• ANSI - American National Standards Institute

• NFPA - National Fire Protection Association

• ASME-AmericanSocietyofMechanicalEngineers

• AHRI-Air-Conditioning,HeatingandRefrigerationInstitute

• CAN - Canada

• EPACT-EnergyPolicyAct

• CSA - Canadian Standards Association

This gas-fired water heater is design certified by Underwriters

Laboratories Inc. under American National Standard/CSA Standard

forGasWaterHeatersANSIZ21.10.3•CSA4.3(currentedition).

QUALIFIED INSTALLER OR SERVICE AGENCY

Installationandserviceofthiswaterheaterrequiresabilityequivalent

tothatofaQualiedAgency(asdenedbyANSIbelow)intheeld

involved. Installation skills such as plumbing, air supply, venting,

gassupplyandelectricalsupplyarerequiredinadditiontoelectrical

testingskillswhenperformingservice.

ANSIZ223.12006Sec.3.3.83:“QualiedAgency”-“Anyindividual,

rm, corporation or company that either in person or through a

representativeisengagedinandisresponsiblefor(a)theinstallation,

testingorreplacementofgaspipingor(b)theconnection,installation,

testing, repair or servicing of appliances and equipment; that is

experiencedinsuchwork;thatisfamiliarwithallprecautionsrequired;

and that has complied with all the requirements of the authority

havingjurisdiction.”

Ifyouarenotqualied(asdenedbyANSIabove)andlicensedor

certiedasrequiredbytheauthorityhavingjurisdictiontoperforma

giventaskdonotattempttoperformanyoftheproceduresdescribed

in this manual. Ifyou do not understand the instructions given in

thismanualdo notattemptto performanyprocedures outlinedin

this manual.

PREPARING FOR THE INSTALLATION

1. ReadtheGeneralSafetyInformationsection,page4ofthis

manual first and then the entire manual carefully.  If you

don’tfollowthesafetyrules,thewaterheaterwillnotoperate

properly. It could cause DEATH, SERIOUS BODILY INJURY

AND/OR PROPERTY DAMAGE.

 This manual contains instructions for the installation,

operation,andmaintenanceofthegas-firedwaterheater.It

alsocontainswarningsthroughoutthemanualthatyoumust

readandbeawareof.Allwarningsandallinstructionsare

essentialtotheproperoperationofthewaterheaterandyour

safety.Sincewecannotputeverythingonthefirstfewpages,

READ THE ENTIRE MANUAL BEFORE ATTEMPTING TO

INSTALL OR OPERATE THE WATER HEATER.

2.The installation mustconform with these instructions and

thelocalcodeauthorityhavingjurisdiction.Intheabsence

oflocalcodes,theinstallationmustcomplywiththecurrent

editions of the National Fuel Gas Code, ANSI Z223.1/

NFPA 54 or CAN/CSA-B149.1 the Natural Gas and Propane

Installation Code. All documents are available from the

Canadian Standards Association, 8501 East Pleasant Valley

Road, Cleveland, OH 44131. NFPA documents are also

available from the National Fire Protection Association, 1

Batterymarch Park, Quincy, MA 02269.

3.Ifafterreading this manualyouhaveanyquestionsor do

notunderstandanyportionoftheinstructions,callthelocal

gasutilityorthemanufacturerwhosenameappearsonthe

ratingplate.

4.Carefully plan the place where you are going to put the

water heater. Correct combustion, vent action, and vent

pipeinstallationareveryimportantinpreventingdeathfrom

possiblecarbonmonoxidepoisoningandfires,seeFigures

3 and 7.

Examine the location to ensure the water heater complies with

the Fact to Consider About The Location section in this manual.

5.ForCaliforniainstallationthiswaterheatermustbebraced,

anchored, or strapped to avoid falling or moving during

an earthquake.  See instructionsforcorrect installation

procedures.InstructionsmaybeobtainedfromCalifornia

Office of the State Architect, 400 P Street, Sacramento,

CA 95814.

6. Massachusetts Code requires this water heater to be installed

in accordance with Massachusetts 248-CMR 2.00: State

PlumbingCodeand248-CMR5.00.

7.Complies with SCAQMD rule#1146.2 and districts having

equivalent NOx requirements.

INTRODUCTION

ROUGH IN DIMENSIONS

INSTALLATION CONSIDERATIONS

FIGURE 1.

HOT WATER

OUTLET

DRAIN

VALVE

HOT

COLD

TOP VIEW

GAS INLET

INSTALL IN ACCORDANCE WITH LOCAL CODES

DRAIN VALVE

COLD WATER

INLET

OUTER DOOR

(BURNER ASSEMBLY BEHIND)

DRAFT HOOD

TEMPERATURE

AND PRESSURE

RELIEF VALVE

WATER HEATER

CONTROL

TABLE 1.

Units ABCDEFGH JK

Inches 70 1/2 66 1/2 30 15/16 27 3/4 15 3/16 415 3/4 16 1 1/41 1/4 1/211 15/16

CM 179.1 168.9 78.6 70.5 38.6 10.2 40.0 40.63.2 NPTNPT 30.3

Inches 62 1/165829 1/225 1/415 7/8 4 15 1/4 16 211/212 1/2

CM 157.6 147.3 74.9 64.1 40.3 10.2 38.7 40.65.1 NPTNPT 31.8

°F 30 40 50 60 70 80 90 100 110 120 130 140

GPH 246 184 147 123105 92 82 74 67 61 57 53

°C 17 22 28 33 39 44 50 56 61 67 72 78

LPH 930 698 558 465399 349 310 279 254233 215 199

°F 30 40 50 60 70 80 90 100 110 120 130 140

GPH 243 182 146 121104 91 81 73 66 61 56 52

°C 17 22 28 33 39 44 50 56 61 67 72 78

LPH 919 689 551 459394 345 306 276 251230 212 197

* Recover rang based on 81% thermal eﬃciency

** Recover rang based on 80% thermal eﬃciency

CLN075100

Natural

DIMENSIONS

Model

CLN075075

75,100 BTU/H

22 kW

RECOVERY RATINGS

Recovery in US Gallons/hr or Liters/hr at Indicated Temperature Rise in Fahrenheit or Celsius

Natural

CLN075075

CLN075100*

ModelINPUT RATE

THERMOMETERS (Not Supplied)

Thermometersshouldbeobtainedandeldinstalled.

Thermometersareinstalledinthesystemasameansofdetecting

thetemperatureoftheoutletwatersupply.

ThisWaterHeaterhasbeendesigncertifiedascomplyingwith

ANSIZ21.10.3-CSA4.3currenteditionforwaterheatersandis

consideredsuitablefor:

Water (Potable) Heating and Space Heating:All models are

consideredsuitableforwater(potable)heatingandspaceheating.

HOTTER WATER CAN SCALD:

Water heaters are intended to produce hot water. Water heated to a

temperaturewhichwillsatisfyspaceheating,clotheswashing,dish

washing,andothersanitizingneedscanscaldandpermanentlyinjure

you upon contact. Some people are more likely to be permanently

injuredbyhotwaterthanothers.Theseincludetheelderly,children,

theinrm,orphysically/mentallyhandicapped.Ifanyoneusinghot

waterinyourhometsintooneofthesegroupsorifthereisalocal

coderequiringacertaintemperaturewateratthehotwatertap,then

youmusttakespecialprecautions.Inadditiontousingthelowest

possible temperature setting that satises your hot water needs,

ameanssuchasa*MixingValveshouldbeusedatthehotwater

tapsusedbythesepeopleoratthewaterheater.Mixingvalvesare

availableatplumbingsupplyorhardwarestores.Consultaqualied

installerorservicetechnician.Followmixingvalvemanufacturer’s

instructions for installationof valves. Before changing the factory

settingonthethermostat,readthe“TemperatureRegulation”section

inthismanual,seeFigures17and18.

FACTS TO CONSIDER ABOUT THE LOCATION

Carefully choose anindoor location for the new waterheater,

because the placement is a very important consideration for

the safety of the occupants in the building and for the most

economical use of the water heater.This water heater is not

foruseinmanufactured(mobile)homesoroutdoorinstallation.

Whetherreplacinganoldwaterheaterorputtingthewaterheater

inanewlocation,thefollowingcriticalpointsmustbeobserved:

1.Selectalocationindoorsascloseaspracticaltothegasventor

chimneytowhichthewaterheaterventisgoingtobeconnected,

andascentralizedwiththewaterpipingsystemaspossible.

2.Selected location must provide adequate clearances for

servicingandproperoperationofthewaterheater.

Installationofwaterheatermustbeaccomplishedinsuchamannerthat

ifthetankoranyconnectionsshouldleak,owwillnotcausedamageto

the structure. For this reason, it is not advisable to install water heater

inanatticorupperoor.Whensuchlocationscannotbeavoided,a

suitable metal drain pan should be installed under the water heater.

Metal Drain pans are available at your local hardware store. Such a

metaldrainpanmusthaveaminimumlengthandwidthofatleast

2”(51mm)greaterthanwaterheaterdimensionsandmustbepiped

toanadequatedrain.Thepanmustnotrestrictcombustionairow.

Waterheaterlifedependsuponwaterquality,waterpressureandthe

environment in which the water heater is installed. Water heaters are

sometimesinstalledinlocationswhereleakagemayresultinproperty

damage,evenwiththeuseofadrainpanpipedtoadrain.However,

unanticipateddamagecanbereducedorpreventedbyaleakdetector

orwatershut-offdeviceusedinconjunctionwithapipeddrainpan.

Thesedevicesareavailablefromsomeplumbingsupplywholesalers

andretailers,anddetectandreacttoleakageinvariousways:

• Sensorsmountedinthedrainpanthattriggeranalarmorturnoff

theincomingwatertothewaterheaterwhenleakageisdetected.

• Sensorsmountedinthedrainpanthatturnoffthewatersupply

to the entire home when water is detected in the drain pan.

• Watersupplyshut-offdevicesthatactivatebasedonthewater

pressuredifferentialbetweenthecoldwaterandhotwaterpipes

connected to the water heater.

• Devicesthatwillturnoffthegassupplytoagaswaterheater

whileatthesametimeshuttingoffitswatersupply.

INSTALLATIONS IN AREAS WHERE FLAMMABLE LIQUIDS

(VAPORS)ARELIKELYTOBEPRESENTORSTORED(GARAGES,

STORAGEANDUTILITYAREAS,ETC.):Flammableliquids(suchas

gasoline,solvents,propane[LPorbutane,etc.]andothersubstances

suchasadhesives,etc.)emitammablevaporswhichcanbeignitedby

agaswaterheater’spilotlightormainburner.Theresultingashback

andrecancausedeathorseriousburnstoanyoneinthearea,aswell

aspropertydamage.Ifinstallationinsuchareasisyouronlyoption,then

installationmustbeaccomplishedinawaythatthepilotameandmain

burnerameareelevatedfromooratleast18inches.Whilethismay

reducechancesofammablevapors,fromaoorspillbeingignited,

gasolineandotherammablesubstancesshouldneverbestoredor

usedinthesameroomorareacontainingagaswaterheaterorother

openameorsparkproducingappliance.NOTE:Flammablevaporsmay

bedrawnbyaircurrentsfromotherareasofthestructuretotheappliance.

Also, the water heater must be located and/or protected so it is not

subjecttophysicaldamagebyamovingvehicle.

Thiswaterheatermustnotbeinstalleddirectlyoncarpeting.Carpeting

must be protected by metal or wood panel beneath the water heater

extendingbeyondthefullwidthanddepthofthewaterheaterbyatleast

3”(76.2mm)inanydirection,orifthewaterheaterisinstalledinan

alcoveorcloset,theentireoormustbecoveredbythepanel.Failure

toheedthiswarningmayresultinarehazard.

HIGH ALTITUDE

Water heaters covered in this manual have been tested and approved

forinstallation at elevationsup to7,700 feet(2,347 m) abovesea

level.Forinstallationabove7,700feet(2,347m),thewaterheater’s

Btuinputshouldbereducedattherateof4percentforeach1,000

feet(305m)abovesealevelwhichrequiresreplacementoftheburner

oriceinaccordancewiththeNationalFuelGasCodeANSIZ223.1/

NFPA 54 or the Natural Gas and Propane Installation Code CAN/

CSAB149.1.Contactyourlocalgassupplierforfurtherinformation.

Failuretoreplacethestandardoricewiththeproperhighaltitude

orice when installed at elevations above 7,700 feet (2,347 m)

couldresultinimproperandinefcientoperationofthewaterheater,

producingcarbonmonoxidegasinexcessofthesafelimits.This

couldresultinseriousinjuryordeath.Contactyourlocalgassupplier

foranyspecicchangesthatmayberequiredinyourarea.

CLEARANCES

Minimum clearances between the water heater and combustible

constructionare0″atsidesandrear,4″(102mm)forCLN075100

and5″(127mm)forCLN075075atthefront,and6″(153mm)from

theventpipe.Clearancefromthetopofjacketis12″(305mm).

FIGURE 2.

A gas water heater cannot operate properly without the correct

amount of air for combustion. Do not install in a conned area

such as a closet, unless you provide air as shown in the Facts to

ConsiderAbout The Locationsection. Never obstruct the owof

ventilationair.Ifyouhaveanydoubtsorquestionsatall,callyour

gassupplier.Failuretoprovidetheproperamountofcombustion

aircanresultinareorexplosionandcausedeath,seriousbodily

injury,orpropertydamage.

FIGURE 3.

Ifthiswaterheaterwillbeusedinbeautyshops,barbershops,

cleaning establishments, or self-service laundrieswithdry

cleaning equipment, it is imperative that the water heater or

water heaters be installed so that combustion and ventilation

airbetakenfromoutsidetheseareas.

Propellantsofaerosolspraysandvolatilecompounds,(cleaners,

chlorinebasedchemicals,refrigerants,etc.)inadditiontobeing

highlyammableinmanycases,willalsochangetocorrosive

hydrochloricacidwhenexposedtothecombustionproductsof

thewaterheater.Theresultscanbehazardous,andalsocause

productfailure.

INSULATION BLANKETS

Do not obstruct water heater air intake

with insulating blanket.

Gas and carbon monoxide detectors

are available.

Install water heater in accordance with

the instruction manual.

Breathing carbon monoxide can cause brain damage or

death. Always read and understand instruction manual.

Breathing Hazard - Carbon Monoxide Gas

Insulation blankets are available to the general public for

external use on gas water heaters but are not necessary

with these products. The purposeof an insulation blanket is

to reduce the standby heat loss encountered with storage

tank heaters. The water heaters covered by this manual meet

or exceed the Energy Policy Act standards with respect to

insulation and standby heat loss requirements, making an

insulation blanket unnecessary.

Should you choose to apply an insulation blanket to this heater,

you should follow these instructions. See the Installation

Considerations section of this manual for identification

of components mentioned below. Failure to follow these

instructions can restrict the air flow required for proper

combustion,potentiallyresulting infire,asphyxiation,serious

personalinjuryordeath.

• DO NOTapplyinsulationtothetopofthewaterheater,as

thiswillinterferewithsafeoperationofthedrafthood.

• DO NOT cover the thermostat or the Temperature-

PressureReliefValve.

• DO NOTallowtheinsulationtocomewithin2inches(5

cm)ofthefloortopreventblockageofcombustionairflow

to the burner.

• DO NOT cover the instruction manual. Keep it on the side

ofthewaterheaterornearbyforfuturereference.

• DOobtainnewwarningandinstructionlabelsfromthe

manufacturerforplacementontheblanketdirectlyover

theexistinglabels.

• DOinspecttheinsulationblanketfrequentlytomake

certainitdoesnotsag,therebyobstructingthe

combustionairflow.

HARD WATER

Wherehardwaterconditionsexist,watersof teningorthethreshold

type of water treatment is recommended. This will protect the

dishwashers,coffeeurns,waterheaters,waterpipingandother

equipment. See the Maintenance Section in this manual for

sediment and lime scale removal procedures.

CIRCULATION PUMPS

Acirculatingpumpisusedwhenasystemrequiresacirculating

loop or there is a storage tank used in conjunction with the

water heater. See Water Piping Diagrams in this manual for

installationlocationofcirculatingpumps.

SeetheCirculationPumpWiringDiagramsbelowforelectrical

hookup information. Install in accordance with the current

edition of the National Electrical Code, NFPA 70 or the

Canadian Electrical Code, CSA C22.1.

Allbronzeorstainlesssteelcirculatingpumpsarerecommended

forusedwithcommercialwaterheaters.

Somecirculatingpumpsaremanufacturedwithsealedbearings

anddonotrequirefurtherlubrication.Somecirculatingpumps

must beperiodicallyoiled. Refertothepumpmanufacturer’s

instructionsforlubricationrequirements.

CIRCULATING PUMP WIRING DIAGRAM

STORAGE TANK OR BUILDING RECIRCULATION

FIELD SUPPLIED TEMPERATURE CONTROL

INSTALLED IN THE STORAGE TANK

OR CIRCULATING LOOP RETURN LINE

CIRC

PUMP

MOTOR

L1 HOT

L2 NEUTRAL

120 VAC

POWER

NOTE: USE SEPARATE 120 VAC POWER

SUPPLY FOR PUMP CIRCUIT. DO NOT

SHARE POWER WITH WATER HEATER AS THIS

MAY CAUSE ELECTRICAL LINE NOISE AND

LEAD TO ERRATIC CONTROL SYSTEM

OPERATION.

FIGURE 4.

CIRCULATING PUMP WIRING DIAGRAM

DISHWASHER LOOP WITH TOGGLE SWITCH

FIELD SUPPLIED TEMPERATURE

CONTROL INSTALLED IN THE

CIRCULATING LOOP RETURN LINE

DISHWASHER

TOGGLE

SWITCH

CIRC

PUMP

MOTOR

L1 HOT

L2 NEUTRAL

120 VAC

POWER

NOTE: USE SEPARATE 120 VAC POWER

SUPPLY FOR PUMP CIRCUIT. DO NOT

SHARE POWER WITH WATER HEATER AS

THIS MAY CAUSE ELECTRICAL LINE NOISE

AND LEAD TO ERRATIC CONTROL SYSTEM

OPERATION.

FIGURE 5.

GAS SUPPLY SYSTEMS

Low pressure building gas supply systems are dened as those

systemsthatcannotunderanycircumstancesexceed14”W.C.

(1/2PSIGauge).Thesesystemsdonotrequirepressureregulation.

Measurementsshouldbetakentoinsurethatgaspressuresarestable

andfallwithintherequirementsstatedonthewaterheaterratingplate.

readingsshould betaken withall gasburning equipmentoff (static

pressure)andwithallgasburningequipmentrunningatmaximumrate

(dynamicpressure).Thegassupplypressuremustbestablewithin1.5”

W.C.fromstatictodynamicpressuretoprovidegoodperformance.

Pressuredropsthatexceed1.5”W.C.maycauseroughstarting,noisy

combustionornuisanceoutages.Increasesorspikesinstaticpressure

duringoffcyclesmaycausefailuretoigniteorinseverecasesdamage

toappliancegasvalves.Ifyourlowpressuresystemdoesnotmeet

theserequirements,theinstallerisresponsibleforthecorrections.

HighPressurebuildingsupplysystemsusepressuresthatexceed

14” W.C. (1/2 PSIGauge). These systemsmust use eld supplied

regulatorstolowerthegaspressuretolessthan14”W.C.(1/2PSI

Gauge).Appliancesrequiregasregulatorsthatareproperlysizedforthe

waterheaterinputanddelivertheratingplatespeciedpressures.Gas

supplysystemswherepressureexceeds5PSIoftenrequiremultiple

regulatorstoachievedesiredpressures.Systemsinexcessof5PSI

buildingpressureshouldbedesignedbygasdeliveryprofessionals

forbestperformance.Waterheatersconnectedtogassupplysystems

thatexceed14”W.C.(1/2PSIGauge)atanytimemustbeequipped

withagassupplyregulator.

GAS PRESSURE REQUIREMENTS

CLN075100 natural gas model requires a minimum gas supply

pressureof5”w.c.(1.25kPa);CLN075075naturalgasmodelrequires

aminimumgassupplypressureof6”w.c.(1.49kPa).Theminimum

supplypressureismeasuredwhilegasisowing(dynamicpressure).

Thesupplypressure(dynamic)shouldneverfallbelowthespecied

minimum supply pressure. The supply pressure should be measured

withallgasredappliancesconnectedtothecommonmainringatfull

capacity.Ifthesupplypressuredropsmorethan1.5”W.C.(0.37kPa)

asgasbeginstoowtothewaterheaterthenthesupplygassystem

includingthegaslineand/or thegasregulatormayberestrictedor

undersized.SeeSupplyGasregulatorsectionandGasPipingsection

ofthismanual.Thegasvalveonallmodelshasamaximumgassupply

pressurelimitof14”W.C.(3.48kPa)Themaximumsupplypressure

ismeasuredwhilegasisnotowing(staticpressure).

SUPPLY GAS REGULATOR

Themaximumallowablegassupplypressureforthiswaterheater

is14.0inchesW.C.(3.48kPa).Installapositivelock-upgaspressure

regulatorinthegassupplylineifinletgaspressurecanexceed14.0

inchesW.C.(3.48 kPa)at anytime.regulators mustbe sized/used

accordingtomanufacturer’sspecications.

Ifapositivelock-upregulatorisrequiredfollowtheseinstructions:

1. Positivelock-upgaspressureregulatorsmustberatedatorabove

 theinputBtu/hrratingofthewaterheatertheysupply.

2. Positivelock-upgaspressureregulator(s)shouldbeinstalledno

 closerthan3feet(1meter)andnofartherthan8feet(2.4meters)

 ofequivalentlengthfromthewaterheater’sinletgasconnection.

3. Afterinstallingthepositivelock-upgaspressureregulator(s)aninitial

 nominalsupplypressuresettingof7.0”W.C.whilethewaterheater

 isoperatingisrecommendedandwillgenerallyprovidegood

 waterheateroperation.Someadditionaladjustmentmayberequired

 latertomaintainasteadygassupplypressure.

4. When installing multiple water heaters in the same gas supply

 system it is recommended that individual positive lock-up gas

 pressureregulatorsbeinstalledateachunit.

MIXING VALVES

Water temperature over 125°F (52°C)

can cause severe burns instantly

resulting in severe injury or death.

Children, the elderly and the physically

or mentally disabled are at highest risk

for scald injury.

Feel water before bathing or showering.

Temperature limiting devices such as

mixing valves must be installed when

required by codes and to ensure safe

temperatures at fixtures.

Waterheatedtoatemperaturewhichwillsatisfyclotheswashing,dish

washing,andothersanitizingneedscanscaldandcausepermanent

injuryuponcontact.Shortrepeatedheatingcyclescausedbysmall

hotwaterusescancausetemperaturesatthepointofusetoexceed

thewaterheater’stemperaturesettingbyupto20°F(11°C).

Somepeoplearemorelikelytobepermanentlyinjuredbyhotwater

than others. These include the elderly, children, the inrm and the

physically/mentally disabled. Table 2 shows the approximate time-

to-burnrelationshipfornormaladultskin.Ifanyoneusinghotwater

provided by the water heater being installed ts into one of these

groupsorifthereisalocalcodeorstatelawrequiringacertainwater

temperatureatthepointofuse,thenspecialprecautionsmustbetaken.

In addition to using the lowest possible temperature setting that

satisesdemandoftheapplicationaMixingValveshouldbeinstalled

atthewaterheaterorathotwatertapstofurtherreducesystemwater

temperature.SeeFigure6.

Mixing valves are available at plumbing supply stores. Consult

a Qualied Installer or Service Technician. Follow mixing valve

manufacturer’sinstructionsforinstallationofthevalves.

TABLE 2.

Water

Temperature°F

Timefor

1stDegreeBurn

(LessSevereBurns)

TimeforPermanentBurns

2nd&3rdDegree

(MostSevereBurns)

110

(normalshowertemp.)

116 (painthreshold)

116 35 minutes 45 minutes

122 1 minute 5 minutes

131 5 seconds 25 seconds

140 2 seconds 5 seconds

149 1 second 2 seconds

154 instantaneous 1 second

(U.S.GovernmentMemorandum,C.P.S.C.,PeterL.Armstrong,Sept.15,1978)

HOT WATER

OUTLET

TO TANK

INLET

CHECK

VALVE

MIXING

VALVE

COLD

WATER

INLET

TEMPERED WATER

OUTLET

12” TO 15”

(30-38 cm)

CHECK

VALVE

FIGURE 6.

INSTALLATION REQUIREMENTS

WATER PIPING

WATER (POTABLE) HEATING AND SPACE HEATING

Thiswaterheatershallnotbeconnectedtoanyheatingsystems

orcomponent(s)usedwithanon-potablewaterheatingappliance.

Allpipingcomponentsconnectedtothisunitforspaceheating

applicationsshallbesuitableforusewithpotablewater.

Toxicchemicals,suchasthoseusedforboilertreatmentshallnot

be introduced into this system.

Whenthesystemrequireswaterforspaceheatingattemperatures

higherthanrequiredfordomesticwaterpurposes,amixingvalve

mustbeinstalled.PleaserefertoFigure6forsuggestedpiping

arrangement.

Thesewaterheaterscannotbeusedinspaceheatingapplications

only.

CLOSED WATER SYSTEMS

Water supply systems may, because of code requirements or

such conditions as high line pressure, among others, have

installed devices such as pressure reducing valves, check

valves,andbackflowpreventers.Devicessuchasthesecause

the water system to be a closed system.

THERMAL EXPANSION

Aswaterisheated,itexpands(thermalexpansion).Inaclosed

systemthevolumeofwaterwillgrowwhenitisheated.Asthe

volumeofwatergrowstherewillbeacorrespondingincreasein

water pressure due to thermal expansion. Thermal expansion

cancauseprematuretankfailure(leakage).Thistypeoffailure

is not covered under the limited warranty. Thermal expansion

canalsocauseintermittentTemperature-PressureReliefValve

operation: water discharged from the valve due to excessive

pressure build up. This condition is not covered under the limited

warranty.TheTemperature-PressureReliefValveisnotintended

fortheconstantreliefofthermalexpansion.

A properly sized thermal expansion tank must be installed on

all closed systems to control the harmful effects of thermal

expansion.Contactalocalplumbingservicetechniciantohave

a thermal expansion tank installed.

FIGURE 7.

NOTE: To protect against untimely corrosion of hot and cold

waterttings,itisstronglyrecommendedthatdi-electricunions

orcouplingsbeinstalledonthiswaterheaterwhenconnectedto

copper pipe.

Figure7showsthetypicalattachmentofthewaterpipingtothe

water heater.

TEMPERATURE-PRESSURE RELIEF VALVE

Explosion Hazard

Temperature-Pressure Relief Valve

must comply with ANSI Z21.22-

CSA 4.4 and ASME code.

Properly sized temperature-

pressure relief valve must be

installed in opening provided.

Can result in overheating and

excessive tank pressure.

Can cause serious injury or death.

Thiswaterheaterisprovidedwithaproperlyrated/sizedand

certifiedcombinationTemperature-PressureReliefValve(T&P

valve)bythemanufacturer.Thevalveiscertifiedbyanationally

recognizedtestinglaboratorythatmaintainsperiodicinspection

ofproductionoflistedequipmentofmaterialsasmeetingthe

requirementsforReliefValvesforHotWaterSupplySystems,

ANSIZ21.22•CSA4.4,andthecoderequirementsofASME.

Ifreplaced,thenewT&Pvalvemustmeettherequirements

oflocalcodes,butnotlessthanacombinationTemperature-

PressureReliefValverated/sizedandcertifiedasindicatedin

theaboveparagraph.Thenewvalvemustbemarkedwitha

maximum set pressure not to exceed the marked hydrostatic

workingpressureofthewaterheater(150psi=1,035kPa)

andadischargecapacitynotlessthanthewaterheaterBtu/

hr or kW input rate as shown on the water heater’s model

ratinglabel.

NOTE: Inaddition tothe factoryinstalledTemperature-Pressure

ReliefValve onthe waterheater,each remotestorage tankthat

maybeinstalledandpipedtoawaterheatingappliancemustalso

have its own properly sized, rated and approved Temperature-

PressureReliefValveinstalled.Callthetollfreetechnicalsupport

phonenumberlistedonthebackcoverofthismanualfortechnical

assistanceinsizingaTemperature-PressureReliefValveforremote

storagetanks.

Forsafeoperation ofthewater heater, theTemperature-Pressure

ReliefValvemustnotberemovedfromitsdesignatedopeningnor

plugged.TheTemperature-PressureReliefValvemustbeinstalled

directlyintothettingofthewaterheaterdesignedforthereliefvalve.

Installdischargepipingsothatanydischargewillexitthepipewithin

6inches(15.2cm)aboveanadequateoordrain,orexternaltothe

building.Incoldclimatesitisrecommendedthatitbeterminatedat

anadequatedraininsidethebuilding.Becertainthatnocontactis

madewithanyliveelectricalpart.Thedischargeopeningmustnot

beblockedorreducedinsizeunderanycircumstances.Excessive

length,over30feet(9.14m),oruseofmorethanfourelbowscan

causerestrictionandreducethedischargecapacityofthevalve.

No valve or other obstruction is to be placed between the

Temperature-PressureReliefValveandthetank.Donotconnect

dischargepipingdirectlytothedrainunlessa6”(15.2cm)airgapis

provided.Topreventbodilyinjury,hazardtolife,orpropertydamage,

therelief valvemust be allowedto dischargewater inadequate

quantitiesshouldcircumstancesdemand.Ifthedischargepipeis

notconnectedtoadrainorothersuitablemeans,thewaterow

maycausepropertydamage.

Water Damage Hazard

•

Temperature-Pressure Relief Valve discharge

pipe must terminate at adequate drain.

CAUTION

T&P Valve Discharge Pipe Requirements:

• Shallnotbesmallerinsizethantheoutletpipesizeofthevalve,

orhaveanyreducingcouplingsorotherrestrictions.

• Shallnotbepluggedorblocked.

• Shallnotbeexposedtofreezingtemperatures.

• Shallbeofmateriallistedforhotwaterdistribution.

• Shallbeinstalledsoastoallowcompletedrainageofboththe

Temperature-PressureReliefValveandthedischargepipe.

• Mustterminateamaximumofsixinchesaboveaoordrain

orexternaltobuilding.Incoldclimates,itisrecommended

thatdischargepipebeterminatedatanadequatedraininside

building.

• Shall not have any valve or other obstruction between the

reliefvalveandthedrain.

Burn hazard.

Hot water discharge.

Keep clear of Temperature-

Pressure Relief Valve

discharge outlet.

TheTemperature-PressureReliefValvemustbemanuallyoperated

atleasttwiceayear.Cautionshouldbetakentoensurethat(1)no

oneisinfrontoforaroundtheoutletoftheTemperature-Pressure

ReliefValvedischargeline,and(2)thewatermanuallydischarged

will not cause any bodily injury or property damage because

thewater maybeextremely hot.Ifafter manuallyoperatingthe

valve,itfailstocompletelyresetandcontinuestoreleasewater,

immediatelyclosethecoldwaterinlettothewaterheater,followthe

draininginstructionsinthismanual,andreplacetheTemperature-

PressureReliefValvewithaproperlyrated/sizednewone.

NOTE: ThepurposeofaTemperature-PressureReliefValveisto

preventexcessivetemperaturesandpressuresinthestoragetank.

The T&P valve is not intended for the constant relief of thermal

expansion.Aproperlysizedthermalexpansiontankmustbeinstalled

on all closed systems to control thermal expansion, see Closed

WaterSystemsandThermalExpansiononpage11.

If you do not understand these instructions or have any questions

regardingtheTemperature-PressureReliefValvecallthetollfreenumber

listedonthebackcoverofthismanualfortechnicalassistance.

FILLING THE WATER HEATER

Neverusethiswaterheaterunless itiscompletelyfullofwater.To

preventdamagetothetank,thetankmustbelledwithwater.Water

mustowfromthe hotwaterfaucetbeforeturning “ON”gastothe

water heater.

Tollthewaterheaterwithwater:

1.Close the waterheater drain valve byturning the handleto the

right(clockwise).Thedrainvalveisonthelowerfrontofthewater

heater.

2. Open the cold water supply valve to the water heater.

NOTE:Thecoldwatersupplyvalvemustbeleftopenwhenthe

water heater is in use.

3.Toinsurecompletellingofthetank,allowairtoexitbyopeningthe

nearesthotwaterfaucet.Allowwatertorununtilaconstantowis

obtained.Thiswillletairoutofthewaterheaterandthepiping.

4. Checkallwaterpipingandconnectionsforleaks.Repairas

needed.

AIR REQUIREMENTS

Breathing Hazard - Carbon Monoxide Gas

Install water heater in accordance with

the Instruction Manual and NFPA 54 or

CAN/CSA-B149.1.

To avoid injury, combustion and ventilation

air must be taken from outdoors.

Do not place chemical vapor emitting

products near water heater.

Breathing carbon monoxide can cause brain damage or

death. Always read and understand instruction manual.

For safe operation an adequate supply of fresh uncontaminated air for

combustion and ventilation must be provided.

An insufcient supply of air can cause recirculation of combustion

products resulting in contamination that may be hazardous to life.

Suchaconditionoftenwillresultinayellow,luminousburnerame,

causingsootingofthecombustionchamber,burnersanduetubes

andcreatesariskofasphyxiation.

Donotinstallthewaterheaterinaconnedspaceunlessanadequate

supplyofairforcombustionandventilationisbroughtintothatspace

usingthemethodsdescribedintheConnedSpacesectionthatfollows.

Neverobstructtheowofventilationair.Ifyouhaveanydoubtsor

questionsatall, callyourgas supplier. Failuretoprovidetheproper

amountofcombustionaircanresultinareorexplosionandcauseproperty

damage,seriousbodilyinjuryordeath.

UNCONFINED SPACE

AnUnconfinedSpaceisonewhosevolumeisnotlessthan50

cubic feet per 1,000 Btu/hr (4.8 cubic meters per kW) of the

totalinputratingofallappliancesinstalledinthespace.Rooms

communicatingdirectlywiththespace,inwhichthe appliances

are installed, through openings not furnished with doors, are

consideredapartoftheunconfinedspace.

Makeupairrequirementsfortheoperationofexhaustfans,kitchen

ventilationsystems, clothesdryers andfireplacesshall alsobe

considered in determining the adequacy of a space to provide

combustion, ventilation and dilution air.

UNUSUALLY TIGHT CONSTRUCTION

Inunconfinedspacesinbuildings,infiltrationmaybeadequateto

provideairforcombustion,ventilationanddilutionoffluegases.

However,inbuildingsofunusuallytightconstruction(forexample,

weatherstripping,heavilyinsulated,caulked,vaporbarrier,etc.)

additionalairmustbeprovidedusingthemethodsdescribedin

theConfinedSpacesectionthatfollows.

CONFINED SPACE

AConnedSpaceisonewhosevolumeislessthan50cubicfeetper

1,000Btu/hr(4.8cubicmetersperkW)ofthetotalinputratingofall

appliances installed in the space.

Openingsmustbeinstalledtoprovidefreshairforcombustion,ventilation

and dilution in conned spaces. The required size for the openings is

dependentonthemethodusedtoprovidefreshairtotheconnedspace

andthetotalBtu/hrinputratingofallappliancesinstalledinthespace.

DIRECT VENT APPLIANCES

Appliances installed in a Direct Vent conguration that derive all

air for combustion from the outdoor atmosphere through sealed

intakeairpipingarenotfactoredinthetotalapplianceinputBtu/hr

calculationsusedtodeterminethesizeofopeningsprovidingfresh

airintoconnedspaces.

EXHAUST FANS

Whereexhaustfansareinstalled,additionalairshallbeprovided

toreplacetheexhaustedair.Whenanexhaustfanisinstalledin

thesamespacewithawaterheater,sufficientopeningstoprovide

freshairmustbeprovidedthataccommodatetherequirements

forallappliancesintheroomandtheexhaustfan.Undersized

openingswillcauseairtobedrawnintotheroomthroughthewater

heater’sventsystemcausingpoorcombustion.Sooting,serious

damagetothewaterheaterandtheriskoffireorexplosionmay

result.Itcanalsocreateariskofasphyxiation.

LOUVERS AND GRILLES

Thefreeareasofthefreshairopeningsintheinstructionsthatfollowdonot

takeintoaccountthepresenceoflouvers,grillesorscreensintheopenings.

Therequiredsizeofopeningsforcombustion,ventilationanddilution

airshallbebasedonthe“netfreearea”ofeachopening.Wherethe

freeareathroughadesignoflouverorgrilleorscreenisknown,itshall

beusedincalculatingthesizeofopeningrequiredtoprovidethefree

areaspecied.Wherethelouverandgrilledesignandfreeareaarenot

known,itshallbeassumedthatwoodlouverswillhave25%freearea

andmetallouversandgrilleswillhave75%freearea.Nonmotorized

louversandgrillesshallbexedintheopenposition.

FRESH AIR OPENINGS FOR CONFINED SPACES

The following instructions shall be used to calculate the size,

number and placement of openings providing fresh air for

combustion, ventilation and dilution in confined spaces. The

illustrationsshowninthissectionofthemanualareareference

for the openings that providefresh airinto confined spaces

only.Donotrefertotheseillustrations forthepurposeof vent

installation. See Venting Installation on page 14 for complete

ventinginstallationinstructions.

OUTDOOR AIR THROUGH TWO OPENINGS

FIGURE 8.

The confined space shall be provided with two permanent

openings,onecommencingwithin12inches(300mm)ofthetop

andonecommencingwithin12inches(300mm)ofthebottomof

the enclosure.The openings shall communicate directly with the

outdoors.SeeFigure8.

Eachopeningshallhaveaminimumfreeareaof1squareinchper

4,000Btu/hr(550mm2perkW)oftheaggregateinputratingofall

appliancesinstalledintheenclosure.Eachopeningshallnotbeless

than100squareinches(645cm2).

OUTDOOR AIR THROUGH ONE OPENING

FIGURE 9.

Alternatively a single permanent opening, commencing within 12

inches(300mm)ofthetopoftheenclosure,shallbeprovided.See

Figure9.Thewaterheatershallhaveclearancesofatleast1inch

(25mm)fromthesidesandbackand6inches(150mm)fromthe

frontoftheappliance.Theopeningshalldirectlycommunicatewith

theoutdoorsorshallcommunicatethroughaverticalorhorizontalduct

totheoutdoorsorspacesthatfreelycommunicatewiththeoutdoors

andshallhaveaminimumfreeareaofthefollowing:

1. 1 squareinch per 3000Btu/hr (733 mm

 perkW) of thetotal

inputratingofallapplianceslocatedintheenclosure,and

2. Notlessthanthesumoftheareasofallventconnectorsin

the space.

OUTDOOR AIR THROUGH TWO HORIZONTAL DUCTS

FIGURE 10.

Theconnedspaceshallbeprovidedwithtwopermanenthorizontal

ducts,onecommencing within12inches(300 mm)ofthetop and

one commencing within 12 inches (300 mm) of the bottom of the

enclosure.Thehorizontalductsshallcommunicatedirectlywiththe

outdoors.SeeFigure10.

Eachductopeningshallhaveaminimumfreeareaof1squareinch

per2,000Btu/hr(1100mm2perkW)oftheaggregateinputratingof

all appliances installed in the enclosure.

Whenductsareused,theyshallbeofthesamecrosssectionalarea

asthefreeareaoftheopeningstowhichtheyconnect.Theminimum

dimensionofrectangularairductsshallbenotlessthan3inches.

OUTDOOR AIR THROUGH TWO VERTICAL DUCTS

The illustrations shown in this section of the manual are a

reference for the openings that provide fresh air into conned

spaces only.

DO NOT refer to these illustrations for the purpose of vent

installation. See Venting Installation on page 14 for complete

ventinginstallationinstructions.

FIGURE 11.

Theconned space shallbe provided withtwo permanentvertical

ducts,onecommencing within12inches(300 mm)ofthetop and

one commencing within 12 inches (300 mm) of the bottom of the

enclosure. The vertical ducts shall communicate directly with the

outdoors.SeeFigure11.

Eachductopeningshallhaveaminimumfreeareaof1squareinch

per4,000Btu/hr(550mm2perkW)oftheaggregateinputratingof

all appliances installed in the enclosure.

Whenductsareused,theyshallbeofthesamecrosssectionalarea

asthefreeareaoftheopeningstowhichtheyconnect.Theminimum

dimensionofrectangularairductsshallbenotlessthan3inches.

AIR FROM OTHER INDOOR SPACES

FIGURE 12.

Theconnedspaceshallbeprovidedwithtwopermanentopenings,

one commencing within 12 inches (300 mm) of the top and one

commencingwithin12inches(300mm)ofthebottomoftheenclosure.

SeeFigure12.

Eachopeningshallcommunicatedirectlywithanadditionalroom(s)

ofsufcientvolumesothatthecombinedvolumeofallspacesmeets

thecriteriaforanUnconnedSpace.

Eachopeningshallhaveaminimumfreeareaof1squareinchper

1,000Btu/hr(2200mm2perkW)oftheaggregateinputratingofall

appliancesinstalledintheenclosure.Eachopeningshallnotbeless

than100squareinches(645cm2).

VENTING

If the water heater is being installed as a replacement for an

existingheaterinpre-existingventing,athoroughinspectionof

existingventingsystemmustbeperformedpriortoanyinstallation

work.

VENT DAMPERS - Any vent damper, whether it is operated

thermallyorotherwisemustberemovedifitsuseinhibitsproper

draftingofthewaterheater.

ThermallyOperatedVentDampers:thisgas-firedwaterheater

has a thermal efficiency at or above80% which mayproduce

arelativelylow fluegas temperature.Suchtemperaturesmay

not be high enough to properly open thermally operated vent

dampers.Thiswouldcausespillageofthefluegasesandmay

cause carbon monoxide poisoning. Vent dampers must bear

evidenceofcertificationascomplyingwiththecurrenteditionof

theAmeric anNationalStandardANSIZ21.66CGA6.14(covering

electrically and mechanically actuated vent dampers). Before

installationofanyventdamper,consultthelocalgasutilityfor

furtherinformation.

Toinsureproperventingofthisgas-f iredwaterheater,thecorrect

ventpipediametermustbeutilized.Anyadditionsordeletions

ofothergasappliancesonacommonventwiththiswaterheater

mayadverselyaffecttheoperationofthewaterheater.Consult

yourgassupplierifanysuchchangesareplanned.

Forproperventingincertaininstallations,alargerdiametervent

pipemaybenecessary.Consultyourgassuppliertoaidyouin

determiningtheproperventingforyourwaterheaterfromthevent

tablesinthecurrenteditionoftheNationalFuelGasCodeANSI

Z223.1/NFPA 54 or the Natural Gas and Propane Installation

Code CAN\CSA B 149.1.

Periodicallychecktheventingsystemforsignsofobstructionor

deteriorationandreplaceifneeded.

Thecombustionandventilationairflowmustnotbeobstructed.

The water heaterwith draft hood installedmustbeconnected

to a chimney or listed vent pipe system, which terminates to the

outdoors. Never operate the water heater unless it is vented to the

outdoorsandhasadequateairsupplytoavoidrisksofimproper

operation, explosion or asphyxiation.

Alignthelegsofthedrafthoodwiththeholesprovided.Insert

the legs andsecure the drafthoodto thewaterheater’stop

withthefourscrewsprovidedasshowninFigure13.Donot

alterthedrafthoodinanyway.Ifyouarereplacinganexisting

waterheater,besuretousethenewdrafthoodsuppliedwith

the water heater.

Obstructed or deteriorated vent systems may present serious

health risk or asphyxiation.

DRAFT HOOD

SHEET METAL SCREWS (FOUR PROVIDED)

LEGS

HOLE

INSTALL THE DRAFT HOOD WITH

THE FOUR SCREWS PROVIDED.

JACKET TOP

HOLE

LEGS

FIGURE 13.

The vent pipe from the water heater must be no less than the

diameter of the draft hood outlet on the water heater and must

slopeupwardatleast1/4inchperlinearfoot(21mmpermeter).

SeeFigure14.

Allvent gases mustbe completelyvented tothe outdoorsof the

structure(dwelling). Installonlythe drafthoodprovided withthe

newwaterheaterandnootherdrafthood.

Ventpipesmustbesecuredateachjointwithsheetmetalscrews.

FIGURE 14.

Theremustbeaminimumof6”(153mm)clearancebetweensingle

wall vent pipe and any combustible material. Fill and seal any

clearancebetweensinglewallventpipeandcombustiblematerial

with mortar mix, cement, or other noncombustible substance. For

other thansingle wall, follow ventpipe manufacturer’sclearance

specications.Toinsureatighttoftheventpipeinabrickchimney,

seal around the vent pipe with mortar mix cement.

Failure to have required clearances between vent piping and

combustiblematerialwillresultinarehazard.

Be sure vent pipe is properly connected to prevent escape of

dangerousuegaseswhichcouldcausedeadlyasphyxiation.

Chemicalvaporcorrosionoftheflueandventsystemmayoccur

ifairforcombustioncontainscertainchemicalvapors.Spraycan

propellants,cleaningsolvents,refrigeratorandairconditioner

refrigerants,swimming pool chemicals, calcium and sodium

chloride, waxes, bleach and process chemicals are typical

compounds which are potentially corrosive.

GAS PIPING

Contact your local gas service company to ensure that adequate

gasserviceisavailableandtoreviewapplicableinstallationcodes

foryourarea.

SizethemaingaslineinaccordancewithTable3.Theguresshown

areforstraightlengthsofpipeat0.5in.W.C.pressuredrop,whichis

considerednormalforlowpressuresystems.Note:Fittingssuchas

elbows,teesandlineregulatorswilladdtothepipepressuredrop.

AlsorefertothecurrenteditionsoftheNationalFuelGasCode(NFPA

54)orNaturalGasandPropaneInstallationCode(CAN/CSAB149.1).

Makesuregassuppliedissametypelistedonmodelratingplate.The

inletgaspressuremustnotexceed14inchwatercolumn(2.6kPa)

fornaturalandpropane(L.P.)gas.Theminimuminletgaspressure

shownonratingplateisthatwhichwillpermitringatratedinput.

Ifthegascontrolvalveissubjectedtopressuresexceeding1/2pound

persquareinch(3.5kPa),thedamagetothegascontrolvalvecould

resultinareorexplosionfromleakinggas.

Ifthemaingaslineshut-offservingallgasappliancesisused,also

turn“off”thegasateachappliance.Leaveallgasappliancesshut

“off”untilthewaterheaterinstallationiscomplete.

Agaslineofsufcientsizemustberuntothewaterheater.Consult

thecurrenteditionofNationalFuelGasCodeANSIZ223.1/NFPA54

or the Natural Gas and Propane Installation Code CAN/CSA B149.1

andyourgassupplierconcerningpipesize.

There must be:

• Areadilyaccessible manualshutoffvalvein thegassupply line

servingthewaterheater,and

• Asedimenttrapaheadofthegascontrolvalvetohelppreventdirt

andforeignmaterialsfromenteringthegascontrolvalve.

• Aexiblegasconnectororagroundjointunionbetweentheshut

offvalveandcontrolvalvetopermitservicingoftheunit.

Besuretocheckallthegaspipingforleaksbeforelightingthewater

heater.Useasoapywatersolution,notamatchoropename.Rinse

offsoapysolutionandwipedry.

The minimuminlet gas pressure shown on the rating plate is that

whichwillpermitringattheratedinput.

TABLE 3. GAS SUPPLY LINE SIZES (IN INCHES)*

MAXIMUM CAPACITY OF PIPE IN CUBIC FEET PER HOUR

LENGTH

FEET

NOMINAL IRON PIPE SIZES (

INCHES

)

INPUT IN THOUSANDS (BTU/HR)

1/2" 3/4" 1" 1 1/4" 1 1/2" 2" 2 1/2" 3" 4"

10 175 360 680 1400 2100 3960 6300 11000 23000

20 120 250 465 950 1460 2750 4360 7700 15800

30 97 200 375 770 1180 2200 3520 6250 12800

40 82 170 320 660 990 1900 3000 5300 10900

50 73 151 285 580 900 1680 2650 4750 9700

60 66 138 260 530 810 1520 2400 4300 8800

70 61 125 240 490 750 1400 2250 3900 8100

80 57 118 220 460 690 1300 2050 3700 7500

90 53 110 205 430 650 1220 1950 3450 7200

100 50 103 195 400 620 1150 1850 3250 6700

125 44 93 175 360 550 1020 1650 2950 6000

150 40 84 160 325 500 950 1500 2650 5500

175 37 77 145 300 460 850 1370 2450 5000

200 35 72 135 280 430 800 1280 2280 4600

TABLE 4.

LENGTH

METERS

NOMINAL IRON PIPE SIZES (

INCHES

)

INPUT IN KW

1/2" 3/4" 1" 1 1/4" 1 1/2" 2" 2 1/2" 3" 4"

3 51 105 199 410 615 1160 1845 3221 6735

6 35 73 142 278 428 805 1277 2255 4626

9 28 59 110 225 346 644 1031 1830 3748

12 24 50 94 193 290 556 878 1552 3192

15 21 44 83 170 264 492 776 1391 2840

18 19 40 76 155 237 445 703 1259 2577

21 18 37 70 143 220 410 659 1142 2372

24 17 35 64 135 202 381 600 1083 2196

27 16 32 60 126 190 357 571 1010 2108

31 15 30 57 117 182 337 542 952 1962

38 13 27 51 105 161 299 483 864 1757

46 12 25 47 95 146 278 439 776 1610

53 11 23 42 88 135 249 401 717 1464

61 10 21 40 82 126 234 375 688 1347

Usepipejointcompoundorteontapemarkedasbeingresistantto

theactionofpetroleum[Propane(L.P.)]gases.

Thewaterheateranditsgasconnectionmustbeleaktestedbefore

placingthewaterheaterinoperation.

The water heater and its individual shut-off valve shall be

disconnectedfromthegassupplypipingsystemduringanypressure

testingofthatsystemattestpressuresinexcessof1/2poundper

squareinch(3.5kPa).Itshallbeisolatedfromthegassupplypiping

system by closing its individual manual shut-off valve during any

pressuretestingofthe gassupplypipingsystemat testpressures

equaltoorlessthan1/2poundpersquareinch(3.5kPa).

Connectingthegaspipingtothegascontrolvalveofthewaterheater

canbeaccomplishedbyeitherofthetwomethodsshowninFigures

15 and 16.

FIGURE 15. GAS PIPING WITH FLEXIBLE CONNECTOR.

FIGURE 16. GAS PIPING WITH ALL

BLACK IRON PIPE TO GAS CONTROL.

SEDIMENT TRAPS

Asedimenttrapshallbeinstalledasclosetotheinletofthewater

heateraspracticalatthetimeofwaterheaterinstallation.The

sedimenttrapshallbeeitherateefittingwithacappednipple

inthebottomoutletorotherdevicerecognizedasaneffective

sediment trap. If a tee fitting  is used, it shall be installed in

conformance with one of themethods of installation shown in

theFigures15and16.

Contaminantsinthegaslinesmaycauseimproperoperationof

thegascontrolvalvethatmayresultinfireorexplosion.Before

attachingthegaslinebesurethatallgaspipeiscleanonthe

inside.Totrapanydir torforeignmaterialinthegassupplyline,

asedimenttrapmustbeincorporatedinthepiping.Thesediment

trap must be readily accessible. Install in accordance with the

“GasPiping”section.RefertothecurrenteditionoftheNational

FuelGasCode,ANSIZ223.1/NFPA54ortheNaturalGasand

Propane Installation Code CAN/CSA B149.1.

FLAMMABLE

WARNING:

If you do not follow these instructions exactly, a

fire or explosion may result causing property damage, personal

injury or loss of life.

BEFORE LIGHTING: ENTIRE SYSTEM MUST BE FILLED WITH WATER AND AIR PURGED FROM ALL LINES

WHAT TO DO IF YOU SMELL GAS

Do not try to light any appliance.

Do not touch any electric switch; do not use any

phone in your building.

Immediately call your gas supplier from a neighbor's

phone. Follow the gas supplier's instructions.

If you cannot reach your gas supplier, call the fire

department.

LIGHTING INSTRUCTIONS

TOP KNOB

FIGURE 'A'

"OFF" POSITION

OFF

PILOT

FIGURE 'B'

"PILOT" POSITION

OFF

PILOT

FIGURE 'C'

"ON" POSITION

OFF

PILOT

1. 2.

TO TURN OFF GAS TO APPLIANCE

S e t the t hermosta t to lowest se tting. Push gas control knob down slightly and turn clock-

wise to 'OFF'. Do not force. SEE FIGURE 'A'.

10.

11.

12.

13.

STOP! Read the safety information

above on this label.

Push the gas control knob down slightly and turn

clockwise to "OFF". SEE FIGURE 'A'.

NOTE: Knob cannot be turned from "PILOT" to "OFF"

unless knob is pushed down slightly. Do not force.

Wait five (5) minutes to clear out any gas. If you

then smell gas, STOP! Follow "B" in the

safety information above on this label. If

you do not smell gas,

go to next step.

This unit is equipped with a push button pilot ignitor,

on the gas control.

Continue to hold the gas control knob down for about

one (1) minute after the pilot is lit. Release the gas

control knob and it will pop back up. Pilot should

remain lit. If it goes out , repeat step (3) through (9).

It may take several minutes for air to clear the lines

before the pilot will light.

If knob does not pop up when released, stop and

immediately call your service technician or gas

supplier.

If the pilot will not stay lit after several tries,

turn the gas control knob clockwise to 'OFF' and

call your service technician or gas supplier.

SEE FIGURE 'A'

DANGER: Hotter water increases the risk

of scald injury. Consult the instruction

manual before changing temperature.

At arm's length away, turn gas control knob

counterclockwise to 'ON'. SEE FIGURE 'C'.

Set thermostat to desired setting.

Remove the outer door located below

the gas control unit.

which is used to light the pilot. Locate the ignitor

Turn gas control knob counterclockwise

to "PILOT". SEE FIGURE 'B'.

Replace the outer door.

DIAL

KNOB

GAS CONTROL

THERMOSTAT

GAS CONTROL

PIEZO

IGNITOR

GENERATOR

The pilot is located on the left front corner of the burner.

It can be located by looking through the sight glass to

the left while pressing the piezo ignitor button

several times. Look for a spark at the pilot location

Once the pilot has been found, push the gas knob

all the way down. Immediately press the pilot ignitor

button rapidly (4) to (5) times. If the pilot does not

light, repeat step (3) through (9).

This appliance has a pilot which is lit by a piezo-

electric spark gas ignition system. When lighting

the pilot, follow these instructions exactly.

BEFORE LIGHTING smell all around the

appliance area for gas. Be sure to smell next

to the floor because some gas is heavier than

air and will settle on the floor.

Use only your hand to push down or turn the gas

control knob. Never use tools. If the knob will

not push down or turn by hand, don't try to repair

it, call a qualified service technician. Force or

attempted repair may result in fire or explosion.

Do not use this appliance if any part has been

under water. Immediately contact a qualified

installer or service agency to replace a flooded

water heater. Do not attempt to repair the unit!

It must be replaced!

Set the thermostat to the lowest setting by turning

thermostat dial fully clockwise until it stops.

FOR YOUR SAFETY READ BEFORE LIGHTING

FIGURE "D"

PILOT

MAIN BURNER

THERMOCOUPLE &

BURNER TUBE

START UP CONDITIONS

DRAFT HOOD OPERATION

Check draft hood operation by performing a worst case

depressurization of the building. With all doors and windows

closed, and with all air handlingequipmentand exhaustfans

operating such as furnaces, clothes dryers, range hoods and

bathroomfans,amatchameshouldstillbedrawnintothedraft

hoodofthewaterheaterwithitsburnerring.Iftheameisnot

drawn toward the draft hood, shut off water heater and make

necessaryairsupplychangestocorrect.

CONDENSATION

Whenever the water heater is filled with cold water, some

condensatewillformwhiletheburnerison.Awaterheatermay

Shortrepeatedheatingcyclescausedbysmallhotwaterusescan

causetemperatures at thepointof usetoexceed thethermostat

settingbyupto30°F(16.7°C).Ifyouexperiencethistypeofuse

you should consider using lower temperature settings to reduce

scaldhazards.

Any water heater’s intended purpose is to heat water. Hot water

isneededforcleansing,cleaning,andsanitizing(bodies,dishes,

clothing).Untempered hot water can present a scald hazard.

Dependingonthetimeelement,andthepeopleinvolved(adults,

children, elderly, inrm, etc.)scalding may occur at different

temperatures.

HOTTER WATER CAN SCALD: Water heaters are intended to produce

hotwater.Waterheatedtoatemperaturewhichwillsatisfyspace

heating,clotheswashing,dishwashing,andothersanitizingneeds

canscaldandpermanentlyinjureyouuponcontact.Somepeople

aremorelikelytobepermanentlyinjuredbyhotwaterthanothers.

Theseincludetheelderly,children,theinrm,orphysically/mentally

handicapped.Ifanyoneusinghotwaterinyourhometsintooneof

thesegroupsorifthereisalocalcodeorstatelawrequiringacertain

temperature water at the hot water tap, then you must take special

precautions. In addition to using the lowest possible temperature

settingthatsatisesyourhotwaterneeds,ameanssuchasamixing

valve should be used at the hot water taps used by these people or

atthewaterheater.Mixingvalvesareavailableatplumbingsupplyor

hardwarestores,seeFigure6.Followmanufacturer’sinstructionsfor

installationofthevalves.Beforechangingthefactorysettingonthe

thermostat,readthe“TemperatureRegulation”sectioninthismanual,

seeFigures17and18.

TEMPERATURE REGULATION

FOR YOUR INFORMATION

appeartobeleakingwheninfactthewateriscondensation.This

usually happens when:

a.Anewwaterheaterislledwithcoldwaterforthersttime.

b.Burninggasproduceswatervaporinwaterheaters,par ticularly

highefciencymodelswhereuetemperaturesarelower.

c.Largeamountsofhotwaterareusedinashorttimeandthe

rellwaterinthetankisverycold.

Moisturefromtheproductsofcombustioncondenseonthecooler

tanksurfaces and formdrops ofwater which mayfall ontothe

burnerorotherhotsurfacestoproducea“sizzling”or“frying”noise.

Excessive condensation can cause pilot outage due to water

runningdownthefluetubeontothemainburnerandputtingout

the pilot.

Never allow small children to use a hot water tap, or to draw their own

bath water. Never leave a child or handicapped person unattended

in a bathtub or shower.

NOTE:Awatertemperaturerangeof120°F-140°F(49°C-60°C)is

recommendedbymostdishwashermanufacturers.

Thethermostatofthiswaterheaterhasbeenfactorysetatitslowest

position (PILOT LIGHTING). It is adjustable and must be reset to

the desired temperature setting to reduce the risk of scald injury.

Themark(

)indicativeofapproximately120°F(49°C)ispreferred

startingpoint.SomeStateshavearequirementforalowersetting.

Turn the water temperature dial clockwise (

 ) to decrease the

temperature,orcounterclockwise(

)toincreasethetemperature.

Shouldoverheatingoccurorthegassupplyfailtoshutoff,turnoffthe

manualgascontrolvalvetothewaterheater.

FIGURE 17.

Temperature Time to Produce 2nd & 3rd

Nearly instantaneous

D = APPROX.160°F (71°C) About 1/2 second

C = APPROX.150°F (65°C) About 1-1/2 seconds

B = APPROX.140°F (60°C) Less than 5 seconds

A = APPROX.130°F (54°C) About 30 seconds

= APPROX.120°F (49°C) More than 5 minutes

LOW = APPROX.100°F (37.8°C) - - - - - - - -

Setting Degree Burns on Adult Skin

VERY HOT = APPROX. 181°F (83°C)

FIGURE 18.

CHECKING GAS INPUT

Withthisheaterinoperation,determinewhetheritisreceivingthe

fullratedinputofgas.Thismaybedonebytimingthegasmeter

andmeasuringgaspressurewithagaugeormanometer.Whenthe

heaterisoperatingatfullcapacity(fullgasinput)itshouldconsume

approximately1cubicfootofgasinthetimeshowninTable5.

TABLE 5. INPUT CHECK TIME REQUIRED

TO CONSUME 1 CU. FT. OF GAS

Model Type of Gas

BTU Per

Cu. Ft.

Approx. Time Required To

Consume 1 Cu. Ft. of Gas

CLN075075

CLN075100

Natural 1050 50.3 sec.

Use this formula to “clock” the meter.  Be sure that other gas

consumingappliancesarenotoperatingduringthisinterval.

3,600XH=Btu/Hr

 T=Timeinsecondsneededtoburnonecubicfootofgas.

 H=HeatingvalueofgasinBtu’spercubicfootofgas.

 Btu/Hr=Actualheaterinputrate.

Example:

 T=50.3seconds/ft

 H=1,050Btu/ft

(naturalgas)

 Btu/Hr=?

3,600X1,050=75,100Btu/Hr(22.0kW)

50.3

Comparetheactualinputratetothatgivenontheheater’srating

plate. In the example, theCLN075100’s full input rate shouldbe

75,100Btu/Hrfornaturalgas.

Because of the suddenness and amount of water, condensation

watermaybediagnosedasa“tankleak”.Afterthewaterinthetank

warmsup(about1-2hours),theconditionshoulddisappear.

Do not assume the water heater is leaking until there has been

enoughtimeforthewaterinthetanktowarmup.

Anundersizedwaterheaterwillcausemorecondensation.Thewater

heatermustbesizedproperlytomeetthefamily’sdemandsforhot

waterincludingdishwashers,washingmachinesandshowerheads.

Excessivecondensationmaybenoticedduringthewinterandearly

springmonthswhenincomingwatertemperaturesareattheirlowest.

Goodventingisessentialforagasredwaterheatertooperateproperly

aswellastocarryawayproductsofcombustionandwatervapor.

SMOKE/ODOR

Itisnotuncommontoexperienceasmallamountofsmokeandodor

duringtheinitialstart-up.Thisisduetoburningoffofoilfrommetal

parts, and will disappear in a short while.

STRANGE SOUNDS

Possiblenoisesduetoexpansionandcontractionofsomemetal

partsduringperiodsofheat-upandcool-downdonotnecessarily

representharmfulordangerousconditions.

Condensationcausessizzlingandpoppingwithintheburnerarea

duringheatingandcoolingperiodsandshouldbeconsiderednormal.

See“Condensation”inthissection.

OPERATIONAL CONDITIONS

SMELLY WATER

Ineachwaterheaterthereisinstalledatleastoneanoderodfor

corrosionprotectionofthetank.Certainwaterconditionswillcausea

reaction between this rod and the water. The most common complaint

associatedwiththeanoderodisoneofa“rotteneggsmell”inthe

hotwater.Thisodorisderivedfromhydrogensuldegasdissolved

inthewater.Thesmellistheresultoffourfactorswhichmustallbe

presentfortheodortodevelop:

a.Aconcentrationofsulfateinthesupplywater.

b.Littleornodissolvedoxygeninthewater.

c.A sulfate reducingbacteria which hasaccumulated within the

waterheater(thisharmlessbacteriaisnontoxictohumans).

d.Anexcessofactivehydrogeninthetank.Thisiscausedbythe

corrosionprotectiveactionoftheanode.

Smelly water may be eliminated or reduced in some water heater

modelsbyreplacingtheanode(s)withoneoflessactivematerial,

andthenchlorinatingthewaterheatertankandallhotwaterlines.

Contactthelocalwaterheatersupplierorservicetechnicianfor

furtherinformation concerningan AnodeReplacement Kitand

this chlorination treatment.

Ifthesmellywaterpersistsaftertheanodereplacementandchlorination

treatment,wecanonlysuggestthatchlorinationoraerationofthewater

supply be considered to eliminate the water problem.

Do not remove the anode leaving the tank unprotected. By doing

so, all warranty on the water heater tank is voided.

“AIR” IN HOT WATER FAUCETS

HYDROGEN GAS: Hydrogen gas can be produced in a hot

watersystemthathasnotbeenusedforalongperiodoftime

(generally two weeks or more). Hydrogen gas is extremely

ammable and explosive. To prevent the possibility of injury

underthese conditions,we recommend the hot water faucet,

locatedfarthestaway,be opened for severalminutesbefore

any electrical appliances which are connected to the hot water

systemareused(suchasadishwasherorwashingmachine).If

hydrogengasispresent,therewillprobablybeanunusualsound

similartoairescapingthroughthepipeasthehotwaterfaucet

isopened.Theremustbenosmokingoropenamenearthe

faucetatthetimeitisopen.

HIGH WATER TEMPERATURE SHUT OFF SYSTEM

Thiswaterheaterisequipped with anautomaticgas Shut-off

system.Thissystemworkswhenhighwatertemperaturesare

present.ThehightemperatureShut- offisbuiltintothegascontrol

valve. It automatically resets when the temperature at thermostat

leveldropsbelow120degreesFahrenheit.

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Lochinvar CLN 075100 User manual

Brand: Lochinvar

Model: CLN 075100

Category: Water heaters & boilers

Type: User manual

This manual is also suitable for

CLN075075

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Lochinvar CLN 075100 User manual

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Lochinvar CLN 075100 User manual

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