Weil-McLain 3 Series Boiler User Manual
Contents
1. fo OOD GV 2am Water boiler Series 3 User s information manual If the information in this manual is not followed exactly a fire or explosion may result causing property damage personal injury or loss of life 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 Part No 550 141 812 0699 Hazard definitions Boiler service and maintenance How to use this manual GOLD GV Ser 3 User s information manual Please read this page first Thefollowing defined terms are used throughout this manual to bringattention to the presence of hazards of various risk levels or to important information concerning thelifeof the product DANGER Indicates presence of hazards that will cause severe personal injury death or substantial property damage Indicates presence of hazards that can cause severepersonal injury death or substantial property damage Indicates presence of hazards that will or can caus2. problems Part number 550 141 812 0699 GOLD GV Ser 3 User s information manual STOP Read before proceeding Part number 550 141 812 0699 Failure to adhere to the guidelines on this page can result in severe personal injury death or substantial property damage Boiler service and maintenance To avoid electric shock disconnect electrical supply before performing maintenance e To avoid severe burns allow boiler to cool before performing maintenance You must maintain the boiler as outlined in the manual and have the boiler started up and serviced at least annually by a qualified service technician to ensureboiler system reliability Boiler operation e Do not block flow of combustion or ventilation air to boiler This boiler is equipped with a control which will automatically shut down the boiler should air or vent be blocked If vent or air blockageis easily accessible and removable removeit The boiler should attempt to restart within an hour If blockage is not obvious or cannot be removed have the boiler and system checked by a qualified servicetechnician Should overheating occur or gas supply fail to shut off do not turn off or disconnect electrical supply to pump Instead shut off the gas supply at alocation external to the appliance Do not use this boiler if any part has been under water Immediately call a qualified servicetechnician to inspect the boiler and t
3. Check all valves to and from boiler Return to proper setting Confirm circulator size Metal flakes found in vent outlet or vent starter tee flueway corrosion Contaminated combustion air supply See page 4 in this manual Remove any contaminating products See page 4 in this manual Provide outside air for combustion Kit available through Weil McLain distributor Have qualified service technician pipe up kit Condensation of combustion gases in boiler sections Have qualified service technician check operation of mixing system Repair replace if necessary Some radiators or baseboard units do not heat or are noisy Air in system Bleed air from system through air vents in radiators or baseboard units Low system pressure Fill to correct pressure Check for leaks in boiler or piping Have qualified service technician repair at once High limit set too low Adjust high limit to higher setting Part number 550 141 812 0699 15 Weil McLain Limited Warranty for Residential amp Commercial Cast Iron Boilers RESIDENTIAL WATER WARRANTY Limited Lifetime RESIDENTIAL STEAM WARRANTY Limited 10 Year COMMERCIAL WARRANTY Limited 10 Year NOTE The residential steam and water warranties do not cover residential boilers installed in buildings other than one or two family dwelling units unless they are buildings with individual boilers for each dwe
4. OPERATING smell all around the Do not use this appliance if any part has been under water appliance area for gas Be sure to smell next to Immediately call a lla service technician to inspect the the floor because some gas is heavier than air appliance and to replace any part of the control system and any and will settleon thefloor See below gas control which has been under water WHAT TO DO IF YOU SMELL GAS Do nottry to light any appliance e Immediately call your gas supplier from a neighbor s phone Follow thegassupplier sinstructions Do not touch any electric switch do not useany phonein your building e Ifyou cannot reach your gas supplier call the fire department a OPERATING INSTRUCTIONS M l STOP Read thesafety information aboveon thislabel Rebeishawoesvalve gas valve Set thethermostat to lowest setting model 7200DERN Turn off all electrical power to the appliance Selector arm Removejacket top pana Thisapplianceisequipped with an ignition devicewhich automatically lightstheburner Do not try to light the burner by hand 6 Depress Selector arm slightly and moveleft to OFF 7 Wait five 5 minutesto clear out any gas Then smell for gas including near thefloor If you smell gas STOP Follow B in the safety information above If you don t smell gas go to thenext step Depress Selector arm slightly and moveright to ON Turn on all electric power to the appliance Set thermostat to desired sett
5. a installed on the boiler Do not drain system unless exposure to freezing temperatures will occur Do not drain thesystem if it is filled with an antifreeze solution Do not shut down boilers used for domestic water heating They must operate year round 10 GOLD GV Ser 3 User s information manual How the boiler works O Control module TheGCM control moduleresponds to signals from theroom thermostat air pressure switch inlet water sensor and boiler limit circuit to operate the circulators gas valve igniter and blower When a room thermostat calls for heat the GCM starts the system circulator and blower TheGCM runstheblower longenough to purgethe boiler flue passages then turns on theigniter and lets it warm up After a 15 second warmup the GCM opens the gas valve turns the igniter off and checks for flame Theflamemust comeon within 4 secondsor theGCM will shut down and try thefull cycle again When theroom thermostat is satisfied theGCM turnsoff the boiler components and waits for the next heat call TheGCM indicator lights show normal sequence when the lights are on steady When a problem occurs the GCM flashes combinations of lights which indicate the most likely reason for the problem Transformer The control transformer reduces line voltage to 24 volts for the gas valve and limit circuit Blower The blower pullsin air and mixesit with gas from the gas valve Theblower forces
6. at the beginning of the heating season only by a qualified maintained servicetechnician In addition themaintenanceand care of the boiler designated on page5 and explained on the following pages must be performed to assure maximum boiler efficiency and reliability Failure to service and maintain the boiler and system could result in equipment failure causing possible severe personal injury death or substantial property damage Thefollowinginformation provides detailed instructions NOTICE for completing the maintenance items listed in the maintenance schedule page 5 In addition to this maintenance the boiler must be serviced and started up at the beginning of each heating season by a qualified servicetechnician DAILY Check boiler area To prevent potential of severe personal injury death or substantial property damage eliminate all materials discussed below from the boiler vicinity If 1 2 contaminants are found Remove productsimmediately from the area If they havebeen therefor an extended period call a qualified service technician to inspect the boiler and vent system for possible damage from acid corrosion If products cannot beremoved immediately call a qualified servicetechnician to tale an outside combustion air source for the boiler if not already installed Combustible flammable materials Do not store combustible materials gasoline or any other fla
7. ber 550 141 812 0699 GOLD GV Ser 3 User s information manual GV Water boiler Series 3 a supply to system f pressure temperature gauge a b return from system g flueway inspection port cover a c combustion air inlet fitting h sensor hose trap d flue outlet i manual air vent e gas valve see warning right j relief valve 85001U Part number 550 141 812 0699 11 GOLD GV Ser 3 User s information manual Lighting instructions 7200DERN gas valve Beforeattemptingto start theboiler check the boiler pressure temperature gauge If boiler and system are full of water and properly pressurized the gauge should read at least 12 psig on most systems O perating the boiler without proper water content will damage boiler and controls and could result in severe personal injury death or substantial property damage NN FOR YOUR SAFETY READ BEFORE OPERATING SQ If you do not follow these instructions exactly afire or explosion may result causing property damage personal injury or loss of life Thisappliancedoesnothaveapilot Itisequipped C Useonly your hand to depress and move Selector arm on gas with an ignition devicewhich automatically lights valve Never use tools If the arm will not depress or move by the burner Do not try to light the burner by hand don t try to repair it call a qualified service technician hand Forceor attempted repair may result in afireor explosion Before
8. don t smell gas go to thenext step Turn Gas control knob to ON Turn on all electric power to the appliance a Set thermostat to desired setting 85022 If the appliance will not operate follow the instructions TO TURN OFF GAS TO APPLIANCE below and call your servicetechnician or gas supplier 12 Replacejacket top panel SS TO TURN OFF GAS TO THE APPLIANCE M Set thethermostat to lowest setting Turn off all electric power to theapplianceif serviceisto beperformed Removejacket top pane Turn Gas control knob to OFF Replacejacket top panel Part number 550 141 812 0699 13 GOLD GV Ser 3 User s information manual Common problems and solutions Symptom Common Causes Possible Corrections Rapid cycling boiler turns on and off frequently Thermostat installed where drafts or heat affect reading Locate thermostat on inner wall away from heat sources or cool drafts Heat anticipator in thermostat adjusted incorrectly Adjust thermostat per manufacturer s instructions Incorrect limit setting Set limit according to system needs Maximum setting is 220 F Increase limit setting to decrease cycling Insufficient water flow through boiler Check all valves to and from boiler Return to proper setting Confirm circulator size Frequent release of water through relief valve Expansion tank sized too small Call qualified service technician to c
9. e minor personal injury CAUTION or property damage Indicates special instructions on installation operation or maintenancethat NOTICE ax are important but not related to personal injury or property damage TheUser s information manual provides information to the boiler owner user for routine operation and maintenanceand emergency shutdown D etailed information on boiler installation operation start up service and parts is included in the GV boiler manual The GV boiler manual is intended only for use by a qualified service technician To Read use Pages Learn precautions Warnings and definitions 1 2 and 3 Laundry room or pool make sure boiler air Prevent air is piped to boiler per manual eee 4 contamination Read list of air contaminants you must avoid Have boiler air piped in if you can t avoid Set up a plan for maintaining the boiler using Maintain the schedule included in this manual 5 9 boiler Schedule an annual start up by a qualified ser vice technician before every heating season Hoei kola How the boiler works and illustration 10 11 components Start or Use the Lighting instruction sheet for the gas Shutdown valve installed on your boiler Ask your service 12 or 13 boiler technician if you are unsure which one Troubleshoot LT elite Use the common problems solutions table to common 14 15 resolve typical heating system boiler problems
10. he boiler Boilers operated with combustion air contaminated externally by chemical vapors or with improper fuel additives or with water conditions which may have caused unusual deposits in the cast iron sections These warranties extend only to the first retail purchaser of the boiler and only to a boiler that has not been moved from its original installation site THE WARRANTIES DESCRIBED ABOVE ARE IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE AND MERCHANTABILITY WEIL McLAIN EXPRESSLY DISCLAIMS AND EXCLUDES ANY LIABILITY FOR CONSEQUENTIAL INCIDENTAL INDIRECT OR PUNITIVE DAMAGES FOR BREACH OF ANY EXPRESS OR IMPLIED WARRANTY For prompt product warranty claims notify the installer who in turn will notify the Weil McLain distributor from whom he purchased the boiler If this action does not result in warranty resolution contact Weil McLain Consumer Relations Department 500 Blaine Street Michigan City Indiana 46360 2388 with details in support of the warranty claim Alleged defective part or parts must be returned through trade channels in accordance with the Weil McLain procedure currently in force for handling returned goods for the purpose of inspection to determine cause of failure Weil McLain will furnish new part s to an authorized Weil McLain distributor who in turn will furnish the new part s to the heating contractor who ins
11. heck expansion tank operation and size Flooded expansion tank Call qualified service technician to check expansion tank operation Inoperative limit control Call qualified service technician to replace limit control Need to frequently add makeup water Leaks in boiler or piping Have qualified service technician repair leaks at once to avoid constant use of makeup water Makeup water can cause mineral deposits which in turn can cause boiler section failure Do not use petroleum base stop leak compounds Black water condition Oxygen corrosion due to leaks in boiler and piping Have qualified service technician repair at once Keep pH of water between 7 0 to 8 5 14 Part number 550 141 812 0699 GOLD GV Ser 3 User sinformation manual Common problems and solutions continued Symptom Common Causes Possible Corrections Popping or percolating noise heard in boiler Mineral deposits in sections due to constant use of makeup water Call qualified service technician to de lime boiler if necessary In some cases deposits will be too heavy to remove with de liming procedures Have qualified service technician repair leaks to eliminate need for constant makeup water Incorrect pH of boiler water Call qualified service technician to check pH level and correct pH should be maintained between 7 0 to 8 5 Insufficient water flow through boiler
12. ing If the appliance will not operate follow the instructions TO TURN OFF GAS TO NOTE Selector arm cannot be APPLIANCE below and call your servicetechnician or gas supplier moved to OFF unless arm is 12 Replacejacket top pand pushed in slightly DO NOT force SS TO TURN OFF GAS TO THE APPLIANCE M Set thethermostat to lowest setting Turn off all electric power to theapplianceif serviceisto beperformed Removejacket top panel Depress Selector arm slightly and moveleft gt to OFF Do not force Replacejacket top pand 12 Part number 550 141 812 0699 GOLD GV Ser 3 User s information manual Lighting instructions 36E gas valve Beforeattemptingto start theboiler check the boiler pressure temperature gauge If boiler and system are full of water and properly pressurized the gauge should read at least 12 psig on most systems O perating theboiler without proper water content will damage boiler and controls and could result in severe personal injury death or substantial property damage NN FOR YOUR SAFETY READ BEFORE OPERATING SQ If you do not follow theseinstructions exactly a fire or explosion may result causing property damage personal injury or loss of life Thisappliancedoesnot havea pilot Itisequipped C Use only your hand to turn the Control knob on gas valve with an ignition devicewhich automatically lights Never use tools If the knob will not turn by hand don t try to the burner Do not t
13. iodically during the heating season following the low water cutoff manufacturer s instructions Clean vent termination amp air intake screens 1 Removeall lintand debrisfrom both the boiler air intakescreen and thefluedischarge screen 2 The boiler control module will sense blockage of the air intake or flue and lockout if the blockage is excessive It will signal the failure by flashing the appropriateindicator lights on thecontrol board 3 Ifremovingthedebrisdoes not allow theboiler to operate correctly afterwards contact your qualifed servicetechnician to inspect the boiler and vent air systems Part number 550 141 812 0699 EVERY 6 MONTHS END OF SEASON Part number 550 141 812 0699 GOLD GV Ser 3 User s information manual User maintenance procedures cont Oil blower motor Figure 2 Blower motor 1 Remove the jacket top panel to access the blower motor Useonly S A E 20 motor oil DO NOT usehousehold universal oils Use only S A E 20 motor oil to lubricate the blower motor Do not usecommon universal household oils See Figure 2 Place a few drops of oil in each of the two oiler cups on theside of the blower motor Operate boiler relief valve 1 Before proceeding verify that therelief valve outlet has been piped to asafeplace of discharge avoiding any possibility of scalding from hot water To avoid water damage or scalding dueto valve operation a metal discharge li
14. list price of such section s at the time the warranty claim is made and will be determined as follows 11th year 5 12th year 10 13th year 15 14th year 20 15th year 25 16th year 30 17th year 35 18th year 40 19th year 45 20th year 50 21st year 55 22nd year 60 23rd year 65 24th year 70 25th year and beyond 75 All Residential amp Commercial Cast Iron Boilers These warranties are subject to the condition that the boiler must have been installed by a heating contractor whose principal occupation is the sale and installation of plumbing heating and or air conditioning equipment These warranties do not cover 1 Components that are part of the heating systems but were not furnished by Weil McLain as a part of the boiler The workmanship of any installer of Weil McLain s boilers In addition this warranty does not assume any liability of any nature for unsatisfactory performance caused by improper installation Any costs for labor for removal and reinstallation of the alleged defective part transportation to Weil McLain if necessary and any other materials necessary to perform the exchange Improper burner adjustments control settings care or maintenance Information is included in the installation Instructions Owner s Information Manual and or Start up Service and Maintenance Instructions and other printed technical material furnished by Weil McLain with t
15. ll a qualified servicetechnician to repair any leaks Have leaks fixed at once by a qualifed service technician Continual fresh makeup water will reduce boiler life M ineralscan build up in sections reducing heat transfer overheating cast iron and causing section failure Do not use petroleum based cleaning or sealing compoundsin boiler system Severe damage to boiler and system components can occur resulting in possiblesevere personal injury death or substantial property damage Check venting system 1 Visually inspect the flue gas vent piping for any signs of blockage leakage or joints or st of the piping Notify your qualified servicetechnician at onceif you find any problem Failureto inspect thevent system as noted aboveand havethem repaired by a qualifed servicetechnician can result in vent system failure causing severe personal injury or death Check automatic air vents if used 1 SeeFigurel 2 Removethecap from any automatic air vent in the system and check operation by depressing valveB slightly with thetip of a screwdriver 3 Iftheair vent valveappearsto be workingfreely and not leaking replace cap A twisting all the way on 4 Loosen cap A oneturn to allow vent to operate 5 Havevent replaced if it does not operate correctly Am Figure1 Automatic air vent f B E a gt ha ae E w 85036 MONTHLY PERIODICALLY GOLD GV Ser 3 User s i
16. lling unit First Year All Residential amp Commercial Cast Iron Boilers Limited Warranty for Cast Iron Boilers Weil McLain warrants that its cast iron boilers are free from defects in material and workmanship for one year from the date of installation If any parts are found to be defective in manufacture Weil McLain will provide replacement of such defective parts Second Through Tenth Year Residential Water Steam Second Through Tenth Year Commercial Water Steam Limited Warranty for cast iron sections Weil McLain warrants that the cast iron sections of its water and steam boilers are free from defects in material and workmanship from the date of installation for the second through the tenth year If during such time period any section is found to be defective Weil McLain will provide replacement for the original cast iron section s Eleventh Year and Beyond Residential Water Only Limited Warranty for Cast Iron Sections Weil McLain warrants that the cast iron sections of its residential water boilers are free from defects in material and workmanship for the eleventh year and beyond from the date of installation If during such time period any section s is found to be defective Weil McLain will provide replacement for the original cast iron section s upon the payment of a proportionate charge based on the time the boiler has been in service The proportionate charge will be equal to the appropriate percentage of the
17. mmable vapors or liquids near the boiler Renoveimmediately if found Air contaminants Productscontainingchlorineor fluorine if allowed to contaminatethe boiler intake air will cause acidic condensatein the vent and boiler This will cause significant damage to the vent and or boiler if allowed to continue Read thelist of potential materials listed on page4 of this manual If any of these products arein theroom from which theboiler takes its combustion air they must be removed immediately or the boiler combustion air must besupplied from outside SeeWARNING above Check air openings 1 Verify that combustion and ventilation air openingsto the boiler room and or building are open and unobstructed Verify that boiler vent dischargeand air intake are clean and freeof obstructions Renoveany debris on theair intakeor flue exhaust openings Check boiler pressure ftemperature gauge 1 M akesurethe pressure reading on the boiler pressure temperature gauge does not exceed 24 psig Higher pressure may indicate a problem with the expansion tank Contact a qualified service technician if problem persists Part number 550 141 812 0699 MONTHLY Part number 550 141 812 0699 GOLD GV Ser 3 User s information manual User maintenance procedures cont Check boiler interior piping 1 Removeboiler jacket top 2 Visually inspect for leaks around internal piping circulators relief valve and other fittings Immediately ca
18. nemust be connected to relief valveoutlet and run to asafeplaceof disposal Thisdischargelinemust beinstalled by a qualifed heating installer or service technician in accordance with the instructionsin the Boiler manual The discharge line must be terminated so as to eliminate possibility of severe burnsshould the valve discharge Read the boiler pressure temperature gaugeto make surethe system is pressurized Lift therelief valvetop lever slightly allowing water to relievethrough thevalveand discharge piping If water flows freely release the lever and allow the valve to seat Watch the end of the relief valve discharge pipeto ensurethat the valve does not weep after thelinehashad timeto drain If the valve weeps lift the seat again to attempt to clean the valveseat If the valvecontinues to weep afterwards contact your qualified servicetechnician to inspect the valve and system If water doesnot flow from thevalvewhen you lift thelever completely the valve or discharge line may be blocked Immediately shutdown the boiler following the instructions on the insidejacket top Lighting Instructions Call your qualified servicetechnician to inspect the boiler and system Follow boiler shutdown procedure 1 Follow TO TURN OFF GAS TO APPLIANCE on the Lighting instructions on the inside of thejacket top panel You will also find theseinstructions on pages 12 and 13 of this manual Use the Lighting instruction for the gas valve mod
19. nformation manual User maintenance procedures cont Check condensate drain system 1 Whiletheboileris running check thedischargeend of thecondensatedrain tubing 2 Makesureno fluegasis escaping from thecondensatedrain tubing by holding your fingers in front of thetubing discharge 3 Ifyou do noticefluegas escaping from thedrain tubing thisindicates a dry drain trap Call your qualified servicetechnician to install a condensate drain linecheck valve kit Under some circumstances a GV vent system may not produce enough condensate to keep the condensate trap full of liquid If the trap is not full small amounts of flue products can be emitted into the boiler room through the condensate drain line Contact a qualified servicetechnician to install a condensatedrain line check valve kit CAUTION 4 Verify that the condensate drain tubing is unobstructed by squeezing it Check the entire length of the condensate drain tubing including thecorrugated tube between the boiler vent outlet tee and the boiler jacket side Check boiler relief valve 1 Inspect the boiler relief valveand therelief valvedischargepipefor signs of weeping or leakage 2 If therelief valve often weeps the expansion tank may not beworking properly Immediately contact your qualified servicetechnician to inspect the boiler and system Test low water cutoff if installed 1 Ifthesystem is equipped with alow water cutoff test thelow water cutoff per
20. o replace any part of the control system and any gas control which has been under water Boiler water e DO NOT use petroleum based cleaning or sealing compounds in boiler system Water seal deterioration will occur causing leakage between sections and damage to heating system components This can result in substantial property damage DO NOT use homemade cures or boiler patent medicines Serious damageto boiler personnel and or property may result Continual fresh makeup water will reduce boiler life Mineral build up in sections reduces heat transfer overheats cast iron and causes section failure Addition of oxygen and other gases can cause internal corrosion Leaksin boiler or piping must berepaired at onceto prevent makeup water Do not add cold water to hot boiler Thermal shock can cause sections to crack GOLD GV Ser 3 User s information manual Prevent combustion air contamination Air contamination Common household and hobby products often contain fluorineor chlorinecompounds When these chemicals passthrough theboiler they can form strongacidsin the vent system or boiler The acid can eat through the vent or boiler wall causing serious damageand presentinga possiblethreat of flue gas spillage into the building Pleaseread theinformation below If thecontaminating chemicals will be present have your installer pipe the boiler air from outside per the Boiler manual If
21. ry to light the burner by repair it Call a qualified service technician Forceor attempted hand repair may result in afireor explosion Before OPERATING smell all around the Do not use this appliance if any part has been under water appliance area for gas Be sure to smell next to Immediately call a tone service technician to inspect the the floor because some gas is heavier than air appliance and to replace any part of thecontrol system and any and will settleon the floor Seebelow gas control which has been under water WHAT TO DO IF YOU SMELL GAS Do nottry to light any appliance e Immediately call your gas supplier from a neighbor s phone eer Follow thegas supplier s instructions Donottouch any electric switch do not use any angi phonein your building e Ifyou cannot reach your gas supplier call thefire department EE OPERATING INSTRUCTIONS TS l STOP Read thesafety information aboveon thislabel Whitsnadaacasccske dgers gas valve Set thethermostat to lowest setting model 36E Turn off all electrical power to theappliance Gas control knob Removejacket top pana Thisapplianceisequipped with an ignition devicewhich automatically lightstheburner Do not try to light the burner by hand Turn Gas control knob to OFF 7 Wait five 5 minutesto clear out any gas Then smell for gas including near thefloor If you smell gas STOP Follow B in the safety information above If you
22. s Part number 550 141 812 0699 GOLD GV Ser 3 User s information manual Perform maintenance per schedule below Service technician Owner maintenance see following pages for instructions see following pages for instructions Inspect e Check boiler area e Any problems reported by owner Da Check air openings e Boiler area Check pressure gauge e Air openings e Flue gas vent e Boiler heating surfaces e Water piping Check boiler interior piping e Condensate drain system Check venting system Check air vents Service Lubricate blower motor Check condensate drain system Lubricate any circulators requiring oil Check relief valve Start up e Perform start up per manual Test low water cutoff if used Check test e Check gas piping for leaks A FE v gt lt Z Clean vent termination air intake screens e Check cold fill amp operating pressures e Check temperature mixing system e Check maintain components vents limits expansion tank gauges igniter Oil blower motor e Inspect amp operate relief valve Operate relief valve Review e Review maintenance procedures with owner Shut down procedure Part number 550 141 812 0699 5 GOLD GV Ser 3 User s information manual User maintenance procedures Boiler must be serviced and The boiler should be inspected and started annually
23. talled the boiler If you have any questions about the coverage of this warranty contact Weil McLain at the address above Weil McLain 500 Blaine Street Michigan City IN 46360 2388 http www weil mclain com WEIL McLAIN A United Dominion Company 16 Part number 550 141 812 0699
24. the boiler is installed in any area likely to cause contamination or if products which would contaminate theair cannot beremoved you must pipe combustion air to the boiler air intake Contaminated combustion air will damage the boiler and vent system resulting in possiblesevere personal injury death or substantial property damage Do not operate a GV boiler in a laundry room or pool facility for example without using ducted outsideair These areas will always contain contaminants Products to avoid Areas likely to have contaminants Spray cans containing chloro fluorocarbons Dry cleaning laundry areas and establishments Permanent wave solutions Swimming pools Chlorinated waxes cleaners M etal fabrication plants Chlorine based swimming pool chemicals Beauty shops Calcium chloride used for thawing Refrigeration repair shops Sodium chloride used for water softening Photo processing plants Refrigerant leaks Auto body shops Paint or varnish removers Plastic manufacturing plants Hydrochloric acid muriatic acid Furniture refinishing areas and establishments Cements and glues New building construction Antistatic fabric softeners used in clothes dryers Remodeling areas Chlorine type bleaches detergents and cleaning solvents found in household laundry rooms Garages with workshops Adhesives used to fasten building products and other similar product
25. this mixtureinto the burner for combustion inside the boiler chamber Air pressure switch The air pressure switch signals the control module telling the control module whether air is movingthrough the blower Water temperature limit switch The water temperature limit switch turns off the gas valve if the temperature in the boiler goes aboveits setting The circulators will continue to run as long as thereis a call for heat System circulator The system circulator circulates water through the external system piping The flow rate of the circulator iscontrolled by theGCM depending on thetemperature of the water entering the boiler sections Bypass circulator TheGCM operates the bypass circulator to mix hot water from the boiler outlet with colder return water from the system when needed to prevent condensation of flue gases in the boiler When the water returning to the boiler is below 140 F the GCM regulates the bypass circulator and system circulator flow rates to raise the water temperature up to 140 F before it enters the boiler sections By balancing these flow rates the GCM can protect against condensation even if return water is as low as 60 F Water temperature sensor Thewater temperature sensor monitorsthetemperature of the water entering the boiler sections Thesensor sends thisinformation to theGCM tellingtheGCM how much to adjust thecirculator flow rates to provide at least 140 F entering water Part num
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