High Efficiency Condensing & Non-Condensing oil-fired boilers
Condensing Oil Boilers-North American Market
Transcript of Condensing Oil Boilers-North American Market
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FCX Boiler a zero clearance, oil fired condensing boiler
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What does condensing have to do with efficiency?
Why is this glass sweating?
Because the reaction from warm air meeting a cold surface; condensation.
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How condensation is utilized in obtaining higher efficiencies
by condensing water vapor in the exhaust gases and in doing so recovering its latent heat of vaporization (When water changes state from a gas to a liquid goes from a gas at 212° to liquid at 212° it gives off heat that is absorbed by the water in the boiler), which would otherwise have been wasted.
Latent heat vs. Sensible heat
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Typical Oil Fired Boiler/Furnace System
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Examples of 90+ Oil Furnaces
Drawings taken from Adams Manufacturing Co sales brochure.
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Combustion enters primary chamber
It rises up & passes into secondary chamber.
Continues down through secondary.
Gases start to cool & condensation occurs.
Finally combustion exits through vent terminal.
Condensate drain is piped to code
approved waste collection via trap.
Intake Air
Combustion
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High Temp Return
High Temp Supply
Low Temp Return
Low Temp Supply
Water Flow
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Return temperatures are the single most important thing to the condensing boiler.
Return water temperatures must below 115F for condensing to begin.
100F or less out for maximum efficiency
75 to 85F return water maximum efficiency- try that on a conv. system
Up to 130F out will still provide some condensing
Numbers have been confirmed by Brookhaven Laboratory study.
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FCX COMES IN TWO MODELS FCX 22 and 30 (They both share the same exterior panels but the interior components differ)
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FCX Components
7. High and low temp Connections
7
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1 Built In Controls
On/Off Switch
Summer / Winter Switch
Boiler temp control thermostat
Combustion Overheating Thermostat
Water Overheating Safety Thermostat (Burner cut-Out)
Burner Safety Device Light
Temperature Readout
The FCX is a "plug and play" boiler with full functionality as a stand
alone. But modern third party controls, such as cold-start, outdoor
reset, and indoor feed back, can easily be interfaced with the
system to provide additional flexibility and efficiency.
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Typical Concentric Venting 2
- Low Exhaust Heat
- Can Use existing chimney as chase with out having to be relined
- Can be side wall vented
- Venting can be: Polypropylene or stainless steel
-Concentric venting eliminates the need for combustion grills.
Concentric straight length Concentric horizontal termination
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Example of how low the vent tempts can be - environmentally safe.
Exhaust waste are fewer
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FCX Venting (cont) 2
Horizontal FCX Venting
Single wall installs can be over 50 ft. equivalent length. 90’s = 3.28ft 45’s = 1.6ft
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FCX Venting (cont.) 2
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FCX Venting (cont.) 2
Vertical Venting
The FCX has been tested to over 33 feet effective length.
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Efficient (Riello shown) Burners
1. FCX22 - .55 gph nozzle & air damper setting 2. FCX30 - .70 gph nozzle & air damper setting 3. https://www.youtube.com/watch?v=DFmHXgz_4dk
for burner assembly info.
3
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Riello Burner (cont.) 3
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4
Expansion tank
Mixing Valve
Circulation Pump
Built-in Components
Built In Components:
• Created a more compact unit with a smaller foot print.
• Are internal allowing them to be insulated against sound transfer outside the unit. Creating a ultra quite unit while running.
• Pre-installed components allow for a quick and clean install saving TIME and MONEY $$$$$.
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Stainless Steel Secondary
Turbulators – agitate exhaust flow in tubes.
Secondary Combustion Chamber 5
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6
S.S. “Knight Hood”
High Grade Steel Finned Primary
Primary Combustion Chamber FCX30
S.S. Pot Insert
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S.S. Pot Insert
S.S. Swirler
Primary Combustion Chamber FCX22
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7 High & Low Temp Connections (2 Supplies & 2 Returns)
High temp return
Low temp return
High temp supply
Low temp supply
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Correctly designed loads are a part of efficiency
• Sizes Available
25, 40, 50, & 80 Gallon
• Thermometer
• Aquastat
• 100% 316 L Stainless
Steel
• Special connection for
hot recirculation
• Built for low
temperature boilers
• Comparison of recovery
rates & Sizing
• Works on 130-140°
water
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New Construction –design for low temp baseboard, radiant heat, or panel radiators. Efficient indirects for domestic hot water.
Retrofits
Opportunities & Limitations • Factors affecting the need for higher temperatures – poor
insulation, bad windows, infiltration, few heat emitters i.e. copper finned baseboard
• Fuel savings occur even in non-condensing mode or applications. • Existing ducted systems, furnaces or heat pumps.
Fitting FCX into Hydronic Systems
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Multiple Circulators Utilizing Boiler Pump
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Important websites: www.fcxboilers.com www.fcxalaska.com
Contact information:
Tom Stayer 717-309-2582 c (text is fine) [email protected]
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