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MACHSeries

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Digital PID Control...

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Electronic Air Volume Regulation...

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Precision Fuel-Air Ratio Controller...

…excellent repeatability

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So What ?So What ?

Why does this Why does this boilerboiler

save so much save so much money?money?

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Two essential Two essential factors…factors…

•The capabilities of The capabilities of the boilerthe boiler

•Proper application Proper application of the boilerof the boiler

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Unprecedented Unprecedented CapabilitiesCapabilities•Whisper quietWhisper quiet

•92% efficiency 92% efficiency •99% efficiency 99% efficiency possiblepossible•Aluminum alloy Aluminum alloy metallurgymetallurgy•Cast metal, sectional Cast metal, sectional constructionconstruction•No push nipples or No push nipples or gasketsgaskets•Designed for full Designed for full condensing servicecondensing service•Any temperature 70Any temperature 70oo to 200to 200ooFF

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Superior Fuel UtilizationSuperior Fuel Utilization

•Full modulation burnerFull modulation burner•5:1 turndown5:1 turndown•Variable speed Variable speed combustion air fancombustion air fan•Zero offset fuel-air ratio Zero offset fuel-air ratio controlcontrol•Fuel flow automatically Fuel flow automatically tracks air flowtracks air flow•Automatic air density Automatic air density compensationcompensation

•Low OLow O22 / CO / NO / CO / NOxx standardstandard

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Superior Application Superior Application VersatilityVersatility

•Small diameter ventingSmall diameter venting•Positive pressure Positive pressure ventingventing•100 equivalent ft. x 2100 equivalent ft. x 2•0.22” w.c. x 2 = 0.44” 0.22” w.c. x 2 = 0.44” w.c.w.c.•Multiple venting Multiple venting arrangementsarrangements•Extremely low electrical Extremely low electrical consumptionconsumption•Certified at 3.5” w.c. gas Certified at 3.5” w.c. gas pressurepressure

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Superior Control Superior Control CapabilityCapability•Microprocessor based Microprocessor based

integratedintegratedburner management & burner management & operating control (black operating control (black box technology)box technology)•Digital touch pad Digital touch pad interfaceinterface•Sophisticated TC Sophisticated TC algorithmsalgorithms•DHW priority capabilityDHW priority capability•Advanced monitoring & Advanced monitoring & protection algorithms protection algorithms (including freeze (including freeze protection)protection)•Multiple access levelsMultiple access levels

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Even the little stuff…Even the little stuff…

•Low water-side Low water-side pressure droppressure drop•VictaulicVictaulicTMTM connections connections•Very small footprintVery small footprint•Only 24” (61 cm) wideOnly 24” (61 cm) wide•Light weightLight weight•Available for modular Available for modular configurationconfigurationwith multi-boiler with multi-boiler modulation and modulation and sequencing control sequencing control packagespackages

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•Design certifiedDesign certified

•Factory fire-testedFactory fire-tested

•Factory authorized Factory authorized startupstartup

•Exceptional Exceptional warrantywarranty

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Peak Efficiency at Part Load…

…with smooth 5:1 turndown

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Variable flowVariable flow

Variable Variable temperaturetemperature

Low temperatureLow temperature

Full modulationFull modulation

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What about What about systems?systems?

•IntegratingIntegrating the the boilerboiler

(understanding the system (understanding the system design issues)design issues)

•InstallingInstalling the boiler the boiler(understanding the boiler (understanding the boiler

application issues)application issues)

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Q Q ==

AA x LMTD x x LMTD x UU

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BoilerBoiler Main Main PumpsPumps

TerminTerminal Coilsal Coils

Efficiency Efficiency DecreasesDecreases

Less Flow, Less Flow, Less KWHLess KWH

Higher Higher Temp, Temp,

Poor Part-Poor Part-Load Load

ControlControl

Efficiency Efficiency IncreasesIncreases

More More Flow, Flow, More More KWHKWH

LowerLowerTemp, Temp, Better Better

Part-Load Part-Load ControlControl

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Design IssuesDesign Issues

• Flow-temperature trade-offsFlow-temperature trade-offs

• Source-sink relationshipsSource-sink relationships

• Load profile & boiler size-Load profile & boiler size-quantity quantity

• Boiler integration strategy & Boiler integration strategy & piping designpiping design

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A home for the heat?A home for the heat?

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CurrentCurrentDesign LimitsDesign Limits

• 200200ooFF

• 50 PSIG50 PSIG

• Flow rangeFlow range

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Critical IssuesCritical Issues

• Get the piping rightGet the piping right

• Get the gas supply rightGet the gas supply right

• Get the chimney rightGet the chimney right

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Venting CategoriesVenting Categories

• Category I – A non-condensing gas appliance that Category I – A non-condensing gas appliance that operates with a non-positive vent pressure.operates with a non-positive vent pressure.

• Category II – A condensing gas appliance that operates Category II – A condensing gas appliance that operates with a non-positive vent pressure.with a non-positive vent pressure.

• Category III – A non-condensing gas appliance that Category III – A non-condensing gas appliance that operates with a positive vent pressure.operates with a positive vent pressure.

• Category IV – A condensing gas appliance that operates Category IV – A condensing gas appliance that operates with a positive vent pressure.with a positive vent pressure.

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• Multiple boiler venting systems must Multiple boiler venting systems must be designed to prevent flow of be designed to prevent flow of combustion air or combustion combustion air or combustion products through off-line boilers.products through off-line boilers.

• The boiler’s vent outlet diameter may The boiler’s vent outlet diameter may or may not have anything to do with or may not have anything to do with the proper vent size.the proper vent size.

• The venting system and all of the The venting system and all of the appliances attached to it must belong appliances attached to it must belong to the same venting category.to the same venting category.

Important Chimney Sizing FactsImportant Chimney Sizing Facts

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The chimney is The chimney is an engineered an engineered system…system…

……it must be it must be engineeredengineered ! !

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