Buderus Logano plus GB312 Applications Manual
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Buderus Logano plus GB312 Applications Manual

Buderus Logano plus GB312 Applications Manual

Gas condensing boiler
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Download this manual See also: Instruction and Installation Manual, Applications Manual
Applications Manual
Logano plus GB312
Gas condensing boiler
(Natural Gas only)
CAUTION!
Observe the safety instructions of this installation and
maintenance manual before placing the boiler in oper-
ation.
DANGER!
If installation, adjustment, modification, operation or
maintenance of the heating system is carried out by
an unqualified person, this may result in danger to life
and limb or property damage. The directions of this
installation and maintenance manual must be fol-
lowed precisely. Contact a qualified service com-
pany, service provider or the gas company if support
or additional information is required.
CAUTION!
The operating manual is a component of the techni-
cal documentation and must be handed over to the
operator of the heating system. Discuss the instruc-
tion in this manual with the owner or operator of the
heating system to ensure that they are familiar with all
information required for operation of the heating sys-
tem.
NOTICE!
In the Commonwealth of Massachusetts this appliance
must be installed by a licensed plumber or gas fitter.

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Summary of Contents for Buderus Logano plus GB312

  • Page 1 NOTICE! In the Commonwealth of Massachusetts this appliance must be installed by a licensed plumber or gas fitter. Logano plus GB312...
  • Page 2 GB312 Applications Manual Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...

  • Page 3: Table Of Contents

    8 Internal boiler wiring diagram 9 MC10 wiring diagram 10 Sequence of operations 11 Examples of installations 12 Pump and low loss header selection Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...

  • Page 4: Product Description

    GB312 Applications Manual 1 Product description The Logano plus GB312 ( Fig. 1) is supplied with a fully factory-fi tted and ready-wired Logamatic BC10 basic programmer. 7 747 010 720-01.2RS Fig. 1 Logano plus GB312 - main components Programmer (MC10 and BC10)
  • Page 5 Many other functions for the convenient control of your heating system are available with a programming unit (such as the RC35*). * Available separately by Fall 2008 Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...

  • Page 6: Package Contents

    GB312 Applications Manual 1.1 Package contents The Logano plus GB312 is supplied complete with BC10 basic control unit and MC10 programming unit. • On delivery, check that the packaging is undamaged. • Check that all package contents are present. • Dispose of packaging in an environmentally responsible ˙˙˙manner.
  • Page 7 ⅝ - 1'' 8½' 7 747 010 720-02.3RS Fig. 3 Connections and dimensions for Logano plus GB312 (sizes in inches) = Flue connection = Combustion air pipe connection (balanced flue opera- tion only) = Boiler supply AKO = Condensate outlet...
  • Page 8 10 (slow blow) Appliance dimensions and weight Transport clearance dimensions, width x depth x Inches 34x25x60 42x25x60 50x25x60 height Weight Tab. 2 Specifications Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 9 This series of boiler is not available for LP (Liquid Propane) • There is no fi eld retrofi t kit available to convert this series boiler to LP gas Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...

  • Page 10: Installing The Boiler

    • Refer to “D” dimension for side by side installations • Refer to “B” and "E" dimension for back to back installations See Table 4 for all other clearance dimensions. Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...

  • Page 11: Leveling The Boiler

    • Level the boiler horizontally by turning the adjustable feet and using a spirit level. 7 747 010 720-10.1RS Fig. 6 Leveling the boiler Adjustable feet Spirit level Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...

  • Page 12: Water Quality Requirements

    Pump Fig. 7 WYE Strainer location WYE Strainer Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 13 - Add Rhomar Protek 922 to the system at a volume of 1 gallon of Protek 922 to 25 gallons of system volume. Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 14 fi ll water by 50% and 60% respectively. • Do not use water from salt bedding type exchangers (ion exchanger) used to soften water. Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 15 % (stamp) (measured) on ppm unthreated Signature Total fill water in gal Added water in gal Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...

  • Page 16: Openings For Combustion Air Supply & Venting

    4000 Btu/h. The attic must be ventilated at both ends of the house. Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...

  • Page 17: Venting Requirements

    * This system is only available up to 4" size & only applies to GB312/90 for 55ft TEL or the GB312/120 for 30ft TEL. Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 18 • Check seams and joints for leaks. • Have the entire flue system checked once a year by a qualified heating contractor. Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...

  • Page 19: Installing The Wall Exit For Air Supply Pipe

    fl ue and air supply sys- tems. Buderus can not be held responsible for such poten- tially detrimental effects on boiler operation. The clearances detailed or illustrated in Fig.

  • Page 20: Installing The Roof Exit For Air Pipe

    fl ue and air supply systems. Buderus can not be held responsible for such potentially detrimental effects on boiler operation. The clearances detailed or illustrated should be seen as the absolute minimum and may in some circumstances not be adequate for specifi...
  • Page 21 Air intake terminal (90° elbow facing vertically down- Air inlet (90° elbow or T-piece) wards) External wall External wall Roof Refer to NFPA54, ANSIZ223.1 National Fuel Gas Code for details Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 22 6" = 55ft GB312-280 1029 4" 8" 7" = 100ft 6" = 35ft Note: Breeching pressure measured at outlet of boiler vent connection. Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 23 6" = NA GB312-280 1029 4" 8" 7" = 100ft 6" = NA Note: Breeching pressure measured at outlet of boiler vent connection. Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 24 6" = NA GB312-280 1029 4" 8" 7" = 65ft 6" = NA Note: Breeching pressure measured at outlet of boiler vent connection Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 25 6" = 55ft GB312-280 1029 4" 8" 7" = 65ft 6" = 35ft Note: Breeching pressure measured at outlet of boiler vent connection Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...

  • Page 26: Piping The Boiler

    Bolts - ⅝" x 5" L regulations. Washers - ⅝" • Also observe any applicable local regula- Lock Washers tions. Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...

  • Page 27: Connecting The Fuel Supply

    fi ttings have the correct thread size. • Make sure that a sediment trap is fi tted at the inlet for the gas supply pipe to the boiler. Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 28 Use only sealant that is resistant to corrosion by NG for the pipe connections. The sealant must be applied sparingly to the external thread of the pipe connections. Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...

  • Page 29: Pipe Sizing

    2" 2½" 2½" 3" 3" 4" See Sections 10.1 and 10.2, Tables 17 to 20 for Boiler pump (PK) and LLHeader (Hydro-Seperator) selections. Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 30 2½" 3" 3" 4" 4" 4" See Sections 10.1 and 10.2, Tables 17 to 20 for Boiler pump (PK) and LLHeader (Hydro-Seperator) selections. Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...

  • Page 31: Csd-1 Kit

    • If the pressure regulator inside the combination gas valve fails, the H.P. switch will cut-out during burner operation. 7747101925-02-Zuluft, Venturi VM312 US Fig. 21 Air inlet, venturi GB312 US Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 32 (typical) Item Buderus Description part number Low water cut-off SAFGARD 3/4"M High temperature cut-off 3/4"M L4006E1109 Fig. 23 Boiler Supply Manifold and Controls. Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...

  • Page 33: Internal Boiler Wiring Diagram

    | 33 GB312 Applications Manual 8 Boiler internal wiring diagram Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...

  • Page 34: Mc10 Wiring Diagram

    3 4 | GB312 Applications Manual 9 MC10 wiring diagram Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...

  • Page 35: Sequence Of Operations

    | 35 GB312 Applications Manual 10 Sequence of operations Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...

  • Page 36: Examples Of Installations

    3 6 | GB312 Applications Manual 11 Installation examples 11.1 Legend Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...

  • Page 37: Single Boiler Systems

    GB312 Applications Manual 11.2 Single boiler systems 11.2.1 Single boiler with AM10, DHW priority and system circulator See page 38 for wiring diagram Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 38 3 8 | GB312 Applications Manual 11.2.2 Wiring diagram for single boiler with AM10, DHW priority and system circulator See page 37 for piping diagram Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 39 | 39 GB312 Applications Manual 11.2.3 Single boiler with AM10, DHW and system circulator See page 40 for wiring diagram Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 40 4 0 | GB312 Applications Manual 11.2.4 Wiring diagram for single boiler with AM10, DHW and system circulator See page 39 for piping diagram Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 41 | 41 GB312 Applications Manual 11.2.5 Single boiler with AM10, DHW and multiple heat zones See page 42 for wiring diagram Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 42 4 2 | GB312 Applications Manual 11.2.6 Wiring diagram for single boiler with AM10, DHW and multiple heat zones See page 41 for piping diagram Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...

  • Page 43: Multiple Boiler Systems

    11.3 Multiple boiler systems 11.3.1 Two boiler cascade with low loss header, CM10, DHW and multiple heat zones See pages 44 and 45 for wiring diagram Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 44 11.3.2 Wiring diagrams for two boiler cascade with low loss header, CM10, DHW and multiple heat zones See page 43 for piping diagram Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 45 | 45 GB312 Applications Manual See page 43 for piping diagram Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 46 4 6 | GB312 Applications Manual 11.3.3 Two boiler installation with Logamatic 4323 and FM456 See page 47 for wiring diagram Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 47 | 47 GB312 Applications Manual 11.3.4 Wiring diagrams for Two boiler installation with Logamatic 4323 and FM456 See page 46 for piping diagram Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 48 4 8 | GB312 Applications Manual 11.3.5 Four boiler installation with Logamatic 4323 and FM457 See page 49 for wiring diagram Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 49 | 49 GB312 Applications Manual 11.3.6 Wiring diagrams for Four boiler installation with Logamatic 4323 and FM457 See page 48 for piping diagram Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...

  • Page 50: Pump And Low Loss Header Selection

    UPS32-40 607S 1400-20 548082A 7-26-200 3" Flanged GB312-240 UPS40-40 607S 1400-40 548082A 7-26-200 3" Flanged GB312-280 UPS40-40 608S 1400-45 548082A 7-26-200 3" Flanged Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 51 745 gpm 10" 1-51-218 10" Flanged up to 1,030 gpm 12" 1-51-220 12" Flanged up to 1,320 gpm 14" 1-51-222 14" Flanged Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 52 5 2 | GB312 Applications Manual Notes: Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 53 | 53 GB312 Applications Manual Notes: Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 54 5 4 | GB312 Applications Manual Notes: Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 55 | 55 GB312 Applications Manual Notes: Logano plus GB312 applications manual | 04.2008 Technical specifi cations are subject to change without prior notice...
  • Page 56 Bosch Thermotechnology Corp. 50 Wentworth Avenue Londonderry, NH 03053 Tel: 1-800-BUDERUS Fax: 1-603-584-1681 www.buderus.net...

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