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Aerco MFC 3000 Application Manual

Vent and combustion air mfc series multi-fuel condensing boilers
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Download this manual See also: User Manual, Installation Manual
MFC Series Vent and Combustion Air Application Guide
VENT & COMBUSTION AIR APP. GUIDE
Exhaust Venting and Combustion Air Requirements and Piping for:
MFC Series
Applies to MFC Series Models:
• MFC 3000
• MFC 4000
• MFC 5000
• MFC 6000
• MFC 8000
• MFC 10000
Latest Update: 02/08/2016
Page 1 of 32
02/08/2016
Multi-Fuel Condensing Boilers
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Ph.: 800-526-0288
GF-148-V
TAG-0080_0C
GF-148-V

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Summary of Contents for Aerco MFC 3000

  • Page 1 • MFC 3000 • MFC 4000 • MFC 5000 • MFC 6000 • MFC 8000 • MFC 10000 Latest Update: 02/08/2016 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 1 of 32 TAG-0080_0C Ph.: 800-526-0288 02/08/2016 GF-148-V...

  • Page 2: Table Of Contents

    MFC Series Pressure Drop Calculation Example ..........15 Manifolded Ducted Combustion Air ................16 Common Vent Breeching (Manifolded) ................18 Pressure Drop and Draft Data Tables ................20 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 2 of 32 TAG-0080_0C Ph.: 800-526-0288...

  • Page 3: General

    The exhaust vent MUST be UL listed for use with Category II and IV appliances. The following materials are allowed: The MFC 3000, 4000, 5000, 6000, 8000, and 10000 boilers can use only AL29-4C venting Polypropylene, materials.

  • Page 4: Code Required Vent Terminations

    MFC Series Vent and Combustion Air Application Guide 3. Code Required Vent Terminations The guidelines provided in this bulletin should be followed to comply with AERCO, UL, NFPA 54 NFPA 31, (National Fuel Gas Code, ANSI Z223.1), and in Canada: CSA B149.1-10 recommendations and regulations.

  • Page 5: Combustion Air Supply

    Accumulate in the unit’s combustion air intake and block combustion air flow. • Accumulate over the burner surface and restrict flow of air/fuel mixture. AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 TAG-0080_0C Page 5 of 32 Ph.: 800-526-0288...

  • Page 6: Combustion Air From Within The Building

    MFC Series Vent and Combustion Air Application Guide In these situations, AERCO recommends that a disposable air intake filter be installed, temporarily, above the boiler combustion air inlet. Air filters may be required year-round in instances in which dust or debris can enter the combustion air tube. Consult the boiler Operations and Maintenance Manual for details.

  • Page 7: Combustion Air From Outside The Building

    4). Figure 3: All Combustion Air From Outdoors - Inlet Air From Ventilated Crawl Space and Outlet Air to Ventilated Attic AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 TAG-0080_0C Page 7 of 32 Ph.: 800-526-0288...
  • Page 8 (see Figure 5). OUTDOOR OPENINGS TO HORIZONAL AIR DUCTS Figure 5: All Combustion Air from Outdoors through Horizontal Ducts AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 8 of 32 TAG-0080_0C Ph.: 800-526-0288 02/08/2016...

  • Page 9: One Permanent Opening Method

    Do NOT power the louver directly using the Auxiliary Relay. An external relay (supplied by others) must be employed for this purpose. The boiler power cannot support external accessories. AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 TAG-0080_0C Page 9 of 32 Ph.: 800-526-0288...

  • Page 10: Direct Vent/Ducted Combustion Air

    For wiring connections and further details regarding the auxiliary relay and limit circuit, refer to the MFC Series boiler Operations and Maintenance manual. If an AERCO supplied sequencing panel is being used to manage a multiple boiler installation, the louver can be opened using the System Start relays. Refer to the MFC Series Operations and Maintenance Manual, GF-148, for wiring connections and further details.

  • Page 11: Exhaust Vent And Combustion Air Systems

    The pressure drop values in Section 24 are in equivalent feet for varying exhaust vent sizes based on each MFC Series model. Consult your local AERCO representative if you require additional venting information. 12. Gross Natural Draft Flue gases have a lower density (and are lighter) than air and will rise, creating "gross natural...

  • Page 12: Corrections For Altitude

    Do not use static regain method on common ductwork, but rather, use one duct size for the common run (See Figure 13). Contact your AERCO sales representative or AERCO International for design assistance and approval when designing manifolded exhaust vent systems.

  • Page 13: Vent And Combustion Air System Design Requirements

    23 feet. Because this is less than 25 linear feet, an attenuator is required. Contact your local AERCO sales representative for more information on the AERCO exhaust muffler and air inlet attenuator. 19. Vent and Combustion Air System Design Requirements...

  • Page 14: Condensate Removal

    6) Add the total vent pressure drop to the altitude corrected combustion air duct pressure drop. The total system pressure drop must not exceed 140 equivalent feet. AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 14 of 32 TAG-0080_0C Ph.: 800-526-0288...

  • Page 15: Mfc Series Pressure Drop Calculation Example

    = 25.84 + 23.65 48.49 ft. FINAL PRESSURE DROP TOTAL: = CONCLUSION: Pressure drop is less than 140 equivalent feet = SYSTEM OK. AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 TAG-0080_0C Page 15 of 32 Ph.: 800-526-0288 GF-148-V...

  • Page 16: Manifolded Ducted Combustion Air

    For systems using manifolded ducted combustion ductwork, use the longest length of common duct and the individual branch to the furthest boiler to calculate the pressure drop. Figure 10a: Individual Vents – Preferred Installations AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 16 of 32 TAG-0080_0C Ph.: 800-526-0288...
  • Page 17 The branches of the tee can be in the horizontal or vertical direction, as determined by the system designer and site conditions. AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 TAG-0080_0C Page 17 of 32 Ph.: 800-526-0288...

  • Page 18: Common Vent Breeching (Manifolded)

    The main can also remain at one diameter, as long as it is sized for the total number of units vented and the 45° branch connection is retained. Use of the recommended “transition” assembly will reduce the overall system pressure drop. AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 18 of 32 TAG-0080_0C Ph.: 800-526-0288...
  • Page 19 MFC vents should never be interconnected to those connected to other manufacturers’ equipment. Figure 13: Connection of Unit at End of Vent Main AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 TAG-0080_0C Page 19 of 32 Ph.: 800-526-0288...

  • Page 20: Pressure Drop And Draft Data Tables

    6.55 12.16 17.21 0.15 1.72 1.34 3.84 7.13 13.60 0.08 1.02 0.79 2.40 4.45 11.01 0.05 0.64 0.50 1.57 2.92 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 20 of 32 TAG-0080_0C Ph.: 800-526-0288 02/08/2016 GF-148-V...
  • Page 21 9.42 17.50 21.84 0.17 2.51 1.96 6.18 11.48 18.05 0.10 1.64 1.28 4.22 7.84 15.17 0.07 1.11 0.86 2.98 5.54 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 TAG-0080_0C Page 21 of 32 Ph.: 800-526-0288 GF-148-V 02/08/2016...
  • Page 22 2) Units for "Straight Run" pressure drop values are (eq. ft. / foot) 3) Units for "Elbows" and "Ent. Loss" are (equivalent feet / item) AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 22 of 32 TAG-0080_0C Ph.: 800-526-0288...
  • Page 23 2) Units for "Straight Run" pressure drop values are (eq. ft. / foot) 3) Units for "Elbows" and "Ent. Loss" are (equivalent feet / item) AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 TAG-0080_0C Page 23 of 32 Ph.: 800-526-0288...
  • Page 24 2) Units for "Straight Run" pressure drop values are (eq. ft. / foot) 3) Units for "Elbows" and "Ent. Loss" are (equivalent feet / item) AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 24 of 32 TAG-0080_0C Ph.: 800-526-0288...
  • Page 25 2) Units for "Straight Run" pressure drop values are (eq. ft. / foot) 3) Units for "Elbows" and "Ent. Loss" are (equivilent feet / item) AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 TAG-0080_0C Page 25 of 32 Ph.: 800-526-0288...
  • Page 26 2) Units for "Straight Run" pressure drop values are (eq. ft. / foot) 3) Units for "Elbows" and "Ent. Loss" are (equivalent feet / item) AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 26 of 32 TAG-0080_0C Ph.: 800-526-0288...
  • Page 27 2) Units for "Straight Run" pressure drop values are (eq. ft. / foot) 3) Units for "Elbows" and "Ent. Loss" are (equivalent feet / item) AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 TAG-0080_0C Page 27 of 32 Ph.: 800-526-0288...
  • Page 28 69.0 55.2 41.4 165.6 153.8 141.9 126.2 110.4 94.6 78.9 63.1 47.3 Note: Based on 160 °F to 180 °F AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 28 of 32 TAG-0080_0C Ph.: 800-526-0288 02/08/2016 GF-148-V...
  • Page 29 69.0 55.2 41.4 165.6 153.8 141.9 126.2 110.4 94.6 78.9 63.1 47.3 Note: Based on 160°F to 180°F Boiler Water AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 TAG-0080_0C Page 29 of 32 Ph.: 800-526-0288 GF-148-V 02/08/2016...
  • Page 30 1. National Fuel Gas Code, 2006 edition, American National Standards Institute, Inc (ANSI Z223.1-2006) and National Fire Protection Association (NFPA54-2006) 2. CSA B149.1 (For Canada installations) AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 30 of 32 TAG-0080_0C Ph.: 800-526-0288...
  • Page 31 MFC Series Vent and Combustion Air Application Guide NOTES: AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 TAG-0080_0C Page 31 of 32 Ph.: 800-526-0288 GF-148-V 02/08/2016...
  • Page 32 Rev C: Removed AHRI per cert., replaced AERCO logos with 02/08/2016 Curtis Harvey new, reformatted cover, header, and footers to match manuals. Copyright AERCO International Inc. 2016 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 32 of 32 TAG-0080_0C Ph.: 800-526-0288 02/08/2016...

This manual is also suitable for:

Mfc 4000Mfc 5000Mfc 8000Mfc 10000Mfc 6000

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