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Mighty Max Volume Water Heater

Page 11

Category I

Vertical Venting (Category I)

Combustion Air In

Through Louvers

Vertical Venting

with Ducted

Combustion Air

Horizontal Venting

Any Vent Which Does Not Meet

Category I Combustion Air

Through Louvers

Horizontal Venting

Ducted Combustion Air

(Certified As Direct Vent)

Non-Category I

Exhaust Terminal Detail

Side View

Wall

Figure 7. Venting and Combustion Air Options.

NOTE:

All views are shown

from rear of heater

Horizontal

Intake Terminal Detail

(Combustion Air)

Side View

Wall

For vertically ducted combustion air:

• Combustion air intake must

terminate at least 3 feet (0.91m)
lower than vent termination, if it is
located within a 10 foot (3.05m)
radius.

• Combustion air intake must be at

least 1 foot (0.3m) above roof top
and normal snow levels.

Screen Provided

On Vertical Intake

Air Terminal

OUT OF

PRODUCTION

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Содержание Mighty Max VW

Страница 1: ... qualified in hot water heater installation and maintenance Improper installation and or operation could create carbon monoxide gas in flue gases which could cause serious injury property damage or death Improper installation and or operation will void the warranty AVERTISSEMENT Assurez vous de bien suivres les instructions données dans cette notice pour réduire au minimum le risque d incendie ou ...

Страница 2: ...on Air 14 2 11 4 Combustion Air Piping 14 2 12 Electrical Wiring 15 SECTION 3 Operation 3 1 Start Up Requirements 17 3 2 Hi Limit Checkout 18 3 3 Venturi and Gas Pressure Regulator System 18 3 3 1 Overall Operation 18 3 4 To Start Up System 18 3 4 1 Setting Temperature Controls 19 3 5 To Shut Down System 19 3 6 Venturi Adjustment Natural Gas 19 3 6 1 Pressure Measurement Port 19 3 6 2 Adjustment P...

Страница 3: ...ge immediately upon delivery and advise the transporter of any shortages or damage Any such claims should be filed with the transporter The transporter will not accept a claim from the shipper Laars The warranty does not cover damage caused by improper installation operation or field modification 1 3 Technical Assistance Consult the local factory representative or Laars factory with any questions ...

Страница 4: ...ommended in areas where the danger of snow blockage exists AVERTISSEMENT L eau chaude peut brûler L eau chaude peut causer des brûlures du troisième degré en 6 secondes à 60 C 140 F et en 30 secondes à 54 C 130 F 1 Locate the heater to provide at least the minimum clearances as listed in Section 2 2 Heater Placement VW heaters require an outdoor terminal kit when installed outdoors see Section 6 P...

Страница 5: ... gas meter to the heater Check local codes for BTU h capacity required 4 Install a sediment trap drip leg ahead of the gas controls see Figure 4 Fit the trap with a threaded cap which can be removed for cleaning 5 When required by code install a second manual gas shutoff valve Do not remove manual shutoff valve supplied with the heater 6 Disconnect the heater and its individual shutoff valve from ...

Страница 6: ...r company If an installer sees damage to any water handling equipment at the installation site it should be repaired as soon as possible to help reduce maintenance costs If there is erosion resize the pump to reduce water velocity before the tube ruptures If scaling is bad set up a heat exchanger tube cleaning maintenance schedule to prevent heat exchanger tube cracking and wear Not fixing the con...

Страница 7: ... valves between the temperature and pressure relief valve and the storage vessel The relief valves discharge water in large quantities should circumstances demand The discharge pipe 1 Must not be connected directly to a drain The Discharge pipe must terminate 6 inches 152mm above a floor drain or external to the building If the discharge pipe is not directed to a drain or other suitable means the ...

Страница 8: ... treatment or any chemicals to the heating system piping since the piping contains water for potable use Do not use solder containing lead in the potable water lines If the space heating system requires water temperatures greater than the water temperature for potable hot water use a tempering valve see Figure 6 Figure 5 Water Piping Diagram Hot Water To Bldg Thermal Expansion Tank Cold Water Hot ...

Страница 9: ...test edition of ANSI Z223 1 NFPA 54 In Canada installation must be in accordance with the latest edition of CSA B149 1 and applicable local codes 2 10 1 Vertical Venting Category I The Mighty Max VW heater has a fan assisted combustion system so vertical vents must be installed in accordance with the special code requirements for Category I Fan Assisted Appliances These requirements can be found i...

Страница 10: ...ontally from or 3 feet 0 9m above such openings 4 Locate the vent terminal so that it cannot be blocked by snow The National Fuel Gas code requires that it be at least 12 inches 305mm above grade but the installer may determine it should be higher depending on local conditions 5 Locate the terminal so the vent exhaust does not settle on building surfaces and other nearby objects Vent products may ...

Страница 11: ...ory I Exhaust Terminal Detail Side View Wall Figure 7 Venting and Combustion Air Options NOTE All views are shown from rear of heater Horizontal Intake Terminal Detail Combustion Air Side View Wall For vertically ducted combustion air Combustion air intake must terminate at least 3 feet 0 91m lower than vent termination if it is located within a 10 foot 3 05m radius Combustion air intake must be a...

Страница 12: ...rom Rear of Flue Collector 4 Connecting Vent Collar Stack to Flue Collector Table 7 Vent Piping Specifications Combustion Air Exhaust Heater Pipe Diameter Max Pipe Length Max No Side Wall Side Wall Size of Elbows Vent Terminal Combustion Air in mm ft m Part Number Terminal Part Number 320M 6 152 50 15 5 D2004500 20260701 400M 7 178 50 15 5 D2004600 20260702 IMPORTANT Maximum pipe length allowed is...

Страница 13: ...living spaces common venting should not be applied and appliances should each be vented separately 2 11Air for Combustion and Ventilation The heater requires air for combustion and the space around the heater requires ventilation Combustion air can be provided by standard practices as specified in the installation codes ANSI Z223 1 NFPA 54 in Canada CSA B149 1 and local applicable codes or ducted ...

Страница 14: ...ers lose less than 1 percent of their input rating to the room but other heat sources may be present Provide enough ventilation air to meet comfort specifications Make sure the ventilation air is not directed at the heater water piping or other equipment which could be damaged by freezing 2 11 3 Conversion for Ducted Combustion Air The conversion to ducted combustion air requires the parts listed ...

Страница 15: ...dière doit être mise à la terre selon les exigences officielles locales ou en l absence de toute instruction officielle l installation doit être conforme avec la dernière édition du Code électrique canadien CSA C22 1 Partie 1 au Canada N utilisez pas la tuyauterie de gaz ou d eau pour mettre à la terre les parties métalliques de la chaudière Les unions diélectriques ou avec tuyau en plastique peuv...

Страница 16: ...IANCE MUST BE REPLACED IT MUST BE REPLACED WITH 1 ALL WIRING TO BE 105 C 600V WIRE RATING APPLIANCE MATERIAL 105 C OF EQUIVALENT GAUGES AWG C NC NO FUSIBLE LINK MANUAL RESET HIGH LIMIT HIGH LIMIT AUTO RESET CONTROLLER TEMPERATURE CONTROL DELAY LOW WATER CUTOFF POWER ON TOGGLE COMBUSTION BK SWITCH TEMP BURNER STACK PRESSURE SWITCH C NO NC SCHEMATIC WIRING DIAGRAM BR VENTURI DIFFERENTIAL PRESSURE SW...

Страница 17: ...rner to ignite This valve is turned ON as follows c Turn counterclockwise to ON d When the igniter is hot the ignition control turns on the gas valve and the burner ignites You can see the burner flame through the view port see Figure 12 e The heater operates until the aquastat senses that the water is hot enough and the burner shuts off The combustion fan runs for about one minute to blow all com...

Страница 18: ...tion air stream In this system changes in combustion air flow automatically change the gas flow The flow of air through the venturi creates a pressure difference At the narrowest point of the venturi the throat high velocity creates a low pressure condition which pulls gas in through an orifice For a correct gas air ratio the gas pressure must be the same as the air pressure but with a slight nega...

Страница 19: ...ce between various pressures is far more important than their gauge value relative to the room The gas pressure offset and the gas orifice pressure differential are especially important concepts The following section describes this setup procedure 3 6 1 Pressure Measurement Ports Natural Gas Air flow enters the venturi through the filter box and blower assembly It is pushed through a converging se...

Страница 20: ...boiler and check for air flow problems b Gas Offset Pressure Natural Gas The difference in pressure between the venturi inlet tap and the outlet of the gas regulator see Figure 15 This measurement is taken by connecting the positive side of the manometer to the venturi inlet tap and connecting the negative side of the manometer to the gas orifice tap This measurement is an indication of the gas to...

Страница 21: ...he gas offset pressure is not according to Table 10 adjust the regulator as needed 5 Measure the gas orifice differential pressure This pressure must be adjusted according to Table 10 4 0 2 inches wc at sea level Use the blower shutter to adjust the gas orifice differential 6 By adjusting the gas orifice differential the gas offset pressure will change Therefore you must repeat steps 3 5 until the...

Страница 22: ...heater off and replace each shutoff valve with the factory installed threaded plugs The venturi has now been adjusted for proper operation SECTION 4 Maintenance 4 1 General Instructions 1 Oil the water circulating pump in accordance with the manufacturer s instructions 2 Oil the blower motor bearings every 6 months 3 If a strainer is used in a pressure reducing valve or in the piping clean it ever...

Страница 23: ... 4 2 1c Cleaning the Heat Exchanger External NOTE The heat exchangers are heavy and may require two people to remove to avoid personal injury FILTER ARROW Figure 18 Filter Exposed for Cleaning WARNING Black carbon soot buildup on a dirty heat exchanger can be ignited by a random spark or flame To prevent this from happening dampen the soot deposits with a wet brush or fine water spray before servi...

Страница 24: ...st time heater start up 1 Turn the heater off using the toggle switch 2 Remove the door panel and bonnet from the jacket 3 Remove the screws on the filter housing to expose the filter as shown in Figure 18 4 Inspect the filter for discoloration due to contamination or any other forms of debris If contamination or debris exists wash the filter in a soap water solution then rinse with water only It ...

Страница 25: ...Mighty Max Volume Water Heater Page 25 Figure 19 Troubleshooting Chart OUT OF PRODUCTION ...

Страница 26: ...gas valves must be open WARNING The ignition control and igniter operate on 120V power Keep this in mind while servicing the heater and take care to avoid contact with electrically live energized parts which will cause electrocution leading to property damage injury or loss of life ATTENTION Débranchez la chaudière avant d enlever ou de remplacer tout élément ou branchement de fil Si la chaudière ...

Страница 27: ...ng controls Wiring errors can cause improper and dangerous operation Verify proper operation after servicing ATTENTION Au moment de l entretien des commandes mettez des étiquettes sur tous les fils avant de les débrancher Des erreurs de câblage peuvent causer un fonctionnement inadéquat et dangereux Vérifier que tout fonctionne bien après votre entretien SECTION 6 Parts List for Mighty Max VW Heat...

Страница 28: ...0256500 24 Collar Jacket 320 400 20258300 25 Bonnet 320M 20156801 400M 20156802 26 Panel Top 320M 20157501 400M 20157502 Item Description Part Number 27 Panel Top Side Left 20152800 28 Panel Side Left 20152700 29 Panel Bottom Side Left 20152900 30 Panel Access 320M 20157401 400M 20157402 31 Panel Back 320M 20157201 400M 20157202 32 Plate Blank back 320M 20256201 400M 20256202 33 Panel Side Right 2...

Страница 29: ...Mighty Max Volume Water Heater Page 29 Front View Right Side View OUT OF PRODUCTION ...

Страница 30: ...Page 30 LAARS Heating Systems Front View Rear View Right Side View Left Side View OUT OF PRODUCTION ...

Страница 31: ...Mighty Max Volume Water Heater Page 31 OUT OF PRODUCTION ...

Страница 32: ...67 603 335 6300 Fax 603 335 3355 1355 Kuehner Drive Simi Valley CA 93063 800 900 9276 Fax 800 559 1583 Sales Service 480 S Service Rd West Oakville Ontario Canada L6K 2H4 905 844 8233 Fax 905 844 2635 www Laars com Litho in U S A Laars Heating Systems 0602 Document 2064D OUT OF PRODUCTION ...

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