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, Installation Manual
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.
Logano plus GB312

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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...

  • Page 3: Table Of Contents

    GB312 Applications Manual Table of Contents Product description CSD-1 Kit 1.1 Package contents 7.1 Operating Addendum for the GB312 in High 1.2 Dimensions and specifications Temperature Applications Installing the boiler 8 Internal boiler wiring diagram 2.1 Recommended wall clearances 2.2 Leveling the boiler 9 MC10 wiring diagram 3 Water quality requirements 10 Sequence of operations...

  • Page 4: Product Description

    GB312 Applications Manual 1 Product description 7 747 010 720-01.2RS Fig. 1 Logano plus GB312 - main components Programmer (MC10 and BC10) Gas burner Boiler front panel Trap Boiler heat exchanger with insulation Burner control unit Gas valve Boiler outer casing...
  • Page 5 GB312 Applications Manual 7 747 010 720-85.1RS Fig. 2 Logamatic BC10 basic programmer - controls On/off switch Dial for DHW set point “DHW heating” LED Status display screen Control knob for maximum boiler temperature “Heat demand” LED Base plate with slot for a programming unit e.g. RC35 (available : Fall 2008) (behind the cover panel) “Burner”...

  • Page 6: Package Contents

    GB312 Applications Manual 1.1 Package contents Component Packaging Boiler (fully assembled with outer 1 box on a pallet casing, Logamatic MC10 program- ming unit, BC10 and gas isolating valve) Technical documentation 1 foil package Set of adjustable feet 1 foil package B-kit (temperature/pressure gauge, 1 box pressure relief valve, supply connector,...

  • Page 7: Dimensions And Specifications

    19½'' - 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 GB312 Applications Manual Boiler size (output - no. of heat exchanger sections) Model 90 - 4 120 - 4 160 - 5 200 - 6 240 - 7 280 - 8 Connection ST (B-kit) ¾ " " 1 Diameter GAS "...
  • Page 9 GB312 Applications Manual 90-4 120-4 160-5 200-6 240-7 280-8 7 747 010 720-30.1RS Fig. 4 Primary circuit flow resistance, GB312 with check valve Flow rate in gal/min (GPM) Primary pressure drop in psi Gas flow rate Boiler rating Natural gas Calorific value 1075 BTU/ft cu ft/hr 120 - 4...

  • Page 10: Installing The Boiler

      _ GB312 Applications Manual 2 Installing the boiler 2.1 Recommended wall clearances Dimension Wall clearance (inch) Recom- minimum mended Tab. 4 Recommended and minimum wall clearances (dimensions in inches). It is imperative that the minimum clearance (dimension E) is main- tained.

  • Page 11: Leveling The Boiler

    _  GB312 Applications Manual 2.2 Leveling the boiler Caution: Risk of boiler damage due to inad- equate load-bearing capacity of floor or un- suitable base. • Make sure that the surface on which the boiler stands has sufficient load-bearing capacity.

  • Page 12: Water Quality Requirements

      _ GB312 Applications Manual 3 Water quality requirements 3.2 Prevention of damage by corrosion About this chapter: Additional protection against corrosion Warranty claims in respect of GB312 boilers are USER NOTE only valid in conjunction with the requirements specified herein and properly completed annual •...

  • Page 13: Water Hardness

    _  GB312 Applications Manual 3.3 Water hardness 3.4 Checking the maximum quantity of first-fill water based on water quality USER NOTE If the system capacity exceeds the calcu- lated allowable water volume V damage to the boiler can result. 955,400 Btu/h = 83 ft = 0.0243...
  • Page 14   _ GB312 Applications Manual Limit curves hardness (CaCO ) [ppm] or [mg/l] Fig. 2 Water treatment limit curv es for the various boiler sizes The rule for V Above the limit curve = water treatment necessary Below the limit curve = no water treatment necessary (Units: 1ft = 7.48 gallon, 1ppm = 1mg/l, 1 grain/gal = 17.1 pm or mg/l) USER NOTE...

  • Page 15: Operator's Log

    _  GB312 Applications Manual 3.6 Operator’s log Details of GB312 heating system: _________________________________________________________________ Date commissioned:__________________________________________________________________________ Max. water volume V : __________ gal at CaCO concentration of ___________ ppm Anti freeze product used? Rhomar Rho Gard (50-60% Concentration): Noble Company Noburst AL (50% Concentration): Date Water volume CaCO...

  • Page 16: Openings For Combustion Air Supply

      _ GB312 Applications Manual 4 Openings for combustion air supply and venting Caution: Dangers posed by explosive and easily combustible materials. • Do not use or store easily combustible ma- terials (paper, lace curtains, clothing, thin- ners, paints, etc.) near the boiler. •...

  • Page 17: Venting Requirements

    _  GB312 Applications Manual 5 Venting requirements General notes 6WDLQOHVV VWHHO XH V\VWHP IRU 86$ DQG &DQDGD 7DEOH  Manufacturer Flue System AL29-4C Starter Adapter Part No. Heatfab Saf-T Vent EZ Seal GB312/90 to GB312/160 = 9601GB ADAPTER (6" nominal size) GB312/200 to GB312/280 = 9801GB ADAPTER (8"...
  • Page 18   _ GB312 Applications Manual Caution: Risk of system damage due to in- adequate condensate drainage. • The condensate that forms in the flue pipe must be drained away from the boiler via the condensate drain on the condensate pan.

  • Page 19: Connecting The Air Supply (For Direct Vent Operations)

    _  GB312 Applications Manual 5.1 Connecting the air supply (for direct vent operations) We recommend that the air supply pipe diameter matches the flue pipe diameter. Fig. 10 Connecting the air supply for balanced flue operation Screw Boiler rat- Required air supply Recommended air supply Cover plate...

  • Page 20: Installing The Roof Exit For Air Pipe

      _ GB312 Applications Manual Contact vent pipe manufacturer for installation guidelines to support vertical lengths of pipe. 12 min Fig. 11 Design of air supply or exhaust pipe wall exit Outer wall retaining plate Sealant T-piece or 4) 90° elbow 90°...
  • Page 21 _  GB312 Applications Manual 5.4 Design of flue and air pipe for balanced flue operation (refer to NFPA54 ANSIZ223.1 for dimensions) 7 747 010 720-17.2RS 7 747 010 720-19.2RS Fig. 13 Wall-exit air supply pipe, roof-exit exhaust Fig. 15 Roof-exit air supply pipe and exhaust Flue outlet (type of outlet depends on chosen manufac- Flue outlet (type of outlet depends on chosen manufac- turer, e.g.

  • Page 22: Venting System Calculation/Sizing Chart

      _ GB312 Applications Manual 5.5 Venting system calculation/sizing chart Note: Calculation example vent pipe: combustion air pipe: What size vent (exhaust) pipe is needed? What size combustion air pipe is needed? 5.5.1 Venting Parameters: Operating Conditions: 7DEOH  GB312 Venting System Table Vent (Exhaust) Outlet Vertical Models...

  • Page 23: Operating Conditions

    _  GB312 Applications Manual 5.5.2 Venting Parameters: Operating Conditions: 7DEOH  GB312 Venting System Table Vent (Exhaust) Outlet Vertical Models Input (MBH) Vent Venting Total Equivalent Vent Diameter for (minus Vent Diameter for (minus Connection Diameter Length of Vent (max) one) size diameter and two) size diameter and at Boiler...
  • Page 24   _ GB312 Applications Manual 5.5.3 Operating Conditions: Venting Parameters: 7DEOH  GB312 Venting System Table Vent (Exhaust) Outlet Horizontal Models Input (MBH) Vent Venting Total Equivalent Vent Diameter for (minus Vent Diameter for (minus Connection Diameter Length of Vent (max) one) size diameter and two) size diameter and at Boiler...
  • Page 25 _  GB312 Applications Manual 5.5.3 Operating Conditions: Venting Parameters: 7DEOH  GB312 Venting System Table Vent (Exhaust) Outlet Horizontal Models Input (MBH) Vent Venting Total Equivalent Vent Diameter for (minus Vent Diameter for (minus Connection Diameter Length of Vent (max) one) size diameter and two) size diameter and at Boiler...

  • Page 26: Piping The Boiler

      _ GB312 Applications Manual 6 Piping the boiler 6.1 Connecting central heating supply 6.2 Fitting the heating system return 2½" 2½" 7 747 010 720-81.1RS Fig. 18 Fitting the return pipe Note: Boiler return Flow Direction Return pipe (external with NPT male thread) Arrow Threaded flange - 2½"...

  • Page 27: Connecting The Fuel Supply

    Trap outlet to neutralizer/waste pipe Trap vent A condensate neutralizer is available as an Blanking cap accessory. (Buderus part no. - NE0.1) Hole for condensate drain hose • Install the neutralizer according to the in- stallation instructions. 6.5 Connecting the fuel supply •...
  • Page 28   _ GB312 Applications Manual Fit and seal the gas isolating valve supplied to the boiler's gas connection. Gas pipe delivery rate in cubic feet of Length gas per hour of pipe in feet 1" 1¼" 1½" 2" 2½" 1060 1600 3050...

  • Page 29: Pipe Sizing

    _  GB312 Applications Manual 6.6 Pipe Sizing System Supply "A" "B" "C" "B" "A" "C" System Return "E" Pump Pump Pump 7DEOH  7KUHH GB312 System (18°F Delta T) Recommended Near Boiler Piping Size Models GB312/90 GB312/120 GB312/160 GB312/200 GB312/240 GB312/280 Pipe A...
  • Page 30   _ GB312 Applications Manual System Supply "C" "A" "D" "B" "C" "B" "A" "D" System Return "E" Pump Pump Pump Pump 7DEOH  )RXU GB312 System (18°F Delta T) Recommended Near Boiler Piping Size Models GB312/90 GB312/120 GB312/160 GB312/200 GB312/240 GB312/280...

  • Page 31: Kit

    _  GB312 Applications Manual 7 CSD-1 Kit High Pressure (H.P.) Switch location set point = 2"WC Nat. Gas. NOTE: • It works on a zero pressure regulated combination gas valve. • If the pressure regulator inside the combination gas valve fails, the H.P.
  • Page 32 Mating Flange Valve 2½" NPT female 50 psig connection Check Valve Supply Supply Manifold Connection at Boiler Gasket (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.

  • Page 33: Operating Addendum For The Gb312 In High Temperature Applications

    _  GB312 Applications Manual 7.1 Operating Addendum for the GB312 in High Temperature Applications...

  • Page 34: Internal Boiler Wiring Diagram

      _ GB312 Applications Manual 8 Boiler internal wiring diagram...

  • Page 35: Mc10 Wiring Diagram

    _  GB312 Applications Manual 9 MC10 wiring diagram...

  • Page 36: Sequence Of Operations

      _ GB312 Applications Manual 10 Sequence of operations...

  • Page 37: High Altitude Adjustment

    _  GB312 Applications Manual 11 High Altitude Adjustment 11.1 General DANGER: 11.3 CO ² adjustment of the burner / adjustment of • If installation, adjustment, modification, the gas valve 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.
  • Page 38   _ GB312 Applications Manual 11.3.1 Set BC10 control to “flue gas test” operation )LJ  6WDUWLQJ WKH ÀXH JDV WHVW 11.3.2 Opening the Service menu and viewing monitor data on the RC35 Menu • Info 6(59,&( 0(18 • 'LDJQRVLV Menu •...
  • Page 39 _  GB312 Applications Manual 11.3.3 Adjusting and checking CO ² level at maximum output • • • • 'R QRW H[FHHG &2 OLPLW JLYHQ LQ 7DEOH  )LJ  6HWWLQJ WKH &2 ð DW PD[LPXP RXWSXW  +LJK RXWSXW DGMXVWLQJ VFUHZ 11.3.4 Adjusting and checking CO ²...

  • Page 40: Setting For Speed Of Burner Fan

      _ GB312 Applications Manual 11.3.5 Check and monitoring CO ² level at maximum output • • • • 11.3.6 Recording measured values • )LJ  5HFRUGLQJ WKH PHDVXUHG YDOXHV •  5HFRPPHQGHG ORFDWLRQ IRU WHVWLQJ SRLQW RQ ÀXH SLSH 11.4 Settings for speed of burner fan 6HWWLQJ RI IDQ VSHHG SDUDPHWHU LQ SURJUDPPLQJ PRGH...
  • Page 41 _  GB312 Applications Manual %& SDUDPHWHU UDQJH IRU IDQ DGMXVWPHQW RI *% ERLOHUV 7DEOH  Parameter Input range Factory setting for sea level operation Burner input load 0 to +9 correction: 2 (- setttings lower than 0 will be ignored by the control) %& SDUDPHWHU VHWWLQJV IRU DGMXVWPHQW RI IDQ VSHHG 7DEOH ...

  • Page 42: Examples Of Installations

      _ GB312 Applications Manual 12 Installation examples 12.1 Legend...

  • Page 43: Single Boiler Systems

    _  GB312 Applications Manual 12.2 Single boiler systems...
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  • Page 49: Multiple Boiler Systems

    _  GB312 Applications Manual 12.3 Multiple boiler systems...
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  • Page 57: Pump And Low Loss Header Selection

    _  GB312 Applications Manual 13 Pump & low loss header (hydro-seperator) selection 13.1 Pump selection based on delta T. ƒ& ƒ) 6LQJOH %RLOHU ,QVWDOODWLRQ 7DEOH  BOILER DATA BOILER PUMP SELECTION HYDRO-SEPERATOR Models Flowrate Boiler Check valve Grundfos B & G pump Taco pump Caleffi Sinus...

  • Page 58: Low Loss Header Selection Per Manufacturer

      _ GB312 Applications Manual 13.2 Low loss header selection per manufacturer CALEFFI 0XOWLSOH ERLOHU DSSOLFDWLRQV 7DEOH  Combined Mains pipe size Caleffi Caleffi Nominal Size Flowrate Hydro-seperator Hydro-seperator (gal/min) selection selection ASME registered Non-ASME up to 247 gpm 4"...
  • Page 59 _  GB312 Applications Manual...

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