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1. Je9H 40sues 10 MHA j2ejuoo 6 2 SNA yun 10 SNA eDeyoA 0 9Beyo Jonuo H 8LOMV va wapa Josues Josues U9uM ysnw je9H Joopino jno yoo ZII 8LOMV 8LOMV 8LOMV 0199 V G jou eu 1 peu Auejod 1294100 ens aye pesn eq jou snw 10jonpuoo punoJb juonne jevo y m Ajduioo Ajajes pue uoyws yo jnys 15 uonounj yun 1 0 swa He e j 88 0000 8LOMV 8LOMV 0108 oiseg MOIS V OL 9sny 4 A09 10 yun GEO OLON V OL OLIAX2. 4 30 558 xe 3ndu jndu gn joejuoo ouaz pasn EE ot enig uien 2 Sjoejuoo yo yno MO LJ a4vS ezer 0 JOMOd pasn Jon Ex pp pee ox ___ aum Ae 12 3 6 Wiring diagrams for Four boiler installation with Logamatic 4323 and FM457 eR Pr TPT oum DiH Hd aiding SP eq ezer onewebo7 jddns wos Z8VINN zit 19yoq saves go Uo seues g9 saves 89 uo UO n aum 5 10 Josuos waid H seues 89 uo jeuiuua Josues ABejeas 191109 v ezer ezer pesn JON I ow swa 9NuM It 87 01L28 0L2IN 21289 Buderus See page 54 for piping diagram Technical specifications are subject to change without prior notice Logano plus GB312 applications manual 12 2009 12 3 7 GB312 Multiple Boiler Primary and Secondary Piping Diagram Without Low Loss Header 1 Piping shall be equal and in reverse return 2 Pipe sizing based on two boiler wit
3. 40 1no MO 94vS 0 JOMOd 20 Josues MOJ os E a Orne KBejens jeuondo zit 19104 nag mold go Jo Z uo anig BETTE A6ejeans Z z y 9SrINA ezer ezer JON JON ES ESEGER ESI ERES hd EJES AERE aa U891 PIU wa J aiding u 19 21289 See 52 for piping diagram Buderus Technical specifications are subject to change without prior notice Logano plus GB312 applications manual 12 2009 12 3 5 Four boiler installation with Logamatic 4323 and FM457 7 ee een eer 829 h LE y M H See page 55 for wiring diagram Buderus Technical specifications are subject to change without prior notice Logano plus GB312 applications manual 12 2009 uiejs S euoz Joye NIIID JOJOW XIW 021 Jeuonippe E Za 719 y ejg yoelq divs div S 97 105095 104 dung
4. uoneoo1 Buderus Technical specifications are subject to change without prior notice Logano plus GB312 applications manual 12 2009 10 Sequence of operations powerup cee saos ee gt H resting state start signal safety check down nes safety relay 0 55 0 55 state 12 state 13 state 20 state 23 SENSU state 31 check check holding tme turn on wait for open 2 gt gt a 9 m pre purge against 25 gas pressure safety pressure Ignition cold fan 55 iaht startspeed 0 1 5s 0 1 75 0 1 45 0 1 305 55 9 0 1 305 state 32 state 35 SEUSS ae Ser state 60 ignition main gas valve gt at work flame signal startload partload 3s 35 0 15 23 0 1 15 105 185 start signal state 190 From every recycling state with own 105 error number state 200 non vola lock out 0 15 From every state with own error number Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice 11 High Altitude Adjustment 11 1 General DANGER N e lfinstallation adjustment modification operation or mainten
5. edvs I 0 JOMOd pasn 3oN OLIAV Jon fee a eT ee ee pe sep pe per EXIST coo gee edvs TRIN ME aum aiding u99Jc eq Cum Aas anum 0L28 0L2IN cit 19 108 21899 Buderus See page 49 for piping diagram Technical specifications are subject to change without prior notice Logano plus GB312 applications manual 12 2009 12 3 3 Two boiler installation with Logamatic 4323 and FM456 l T Lae 3 a al a El ral Eu g cul RES Pul E ru ges y N S a aie Buderus See page 53 for wiring diagram Technical specifications are subject to change without prior notice Logano plus GB312 applications manual 12 2009 12 3 4 Wiring diagrams for Two boiler installation with Logamatic 4323 and FM456 euoz jeau wayskS 210 2 Jeuonippe Eh e div S 7432 Ajddns Jamod AOJOUW XIW Z8VIAN Woy 00 Lf go uo SWE gzd 40jJosues puew p xe yndu HOA 0197 JON uien 2
6. Circulator AM10 Outdoor Reset Module White x Blue ed eus omon ors A EMS Bus Multi Zone Connection Switching to boiler Relay ZC ZR 120 V Circulators Low Temp High Temp Outdoor sensor See page 47 for piping diagram Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice 12 3 1 Two boiler cascade with low loss header CM10 DHW and multiple heat zones 12 3 Multiple boiler systems 1 i vooy i wayskg Josuasg E Hd uejs s El L A E Wd E euoz t p L a wol aunyesoduiay i INPS Rene ae ich ka a la Na a Pn euoz SLO 530351 Buderus Technical specifications are subject to change without prior notice See pages 50 and 51 for wiring diagram Logano plus GB312 applications manual 12 2009 12 3 2 Wiring diagrams for two boiler cascade with low loss header CM10 DHW and multiple heat zones BUS Netz Module Netz Module ESETESESERERERERES GB312 Boiler 1 MC10 BC10 White Grey Wm Few sc ev rw ra w SAFe Re
7. NE dA TT ge W 6 g 3 ere See page 44 for wiring diagram Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice 12 2 2 Wiring diagram for single boiler with AM10 DHW priority and system circulator Single Zone Switching Factory installed jumper DHW Sensor Not used with AM10 GB312 MC10 BC10 Dark Green PEE Dark Green Purple NNNM MEN White _ EEE Pept Not used with AM10 Power to SAFe PS DHW Low water Loading cut off dry Pump contacts L4006A N O Common Not Used Isolation Relay AM10 1 l Outdoor Reset Module Bus onor ors Fog 1 l EMS Bus Connection to boiler Outdoor sensor N C A Boiler P Circulator See page 43 for piping diagram Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice 12 2 3 Single boiler with AM10 DHW and system circulator OTS l 8 NEN dA WE ss ao l e 9 L4006A See page 46 for wiring diagram Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without p
8. Condensate outlet GAS Gas connection main isolating valve ST Pressure relief valve connection RK Boiler return TM zPressure temperature gauge Boiler size output no of heat exchanger sections Model 90 4 120 4 160 5 200 6 240 7 280 8 Width B Inches 39 47 55 Dimension XAA Inches 13 15 174 19 21 Dimension XRK XAL XGAS Inches 10 14 10 14 10 Dimension F Inches 31 3934 48 Dimension A Inches 51 51 AA Flue pipe diameter Inches 6 8 Flue adaptor for desired manufacturer s flue 6 x5 6 x 6 8 8 system Dimension YAA Inches 18 19 Dimension ZAA Inches 534 124 AL Diameter of combustion air pipe bal Inches 4 anced flue only Use rubber plumbing adapter to connect Connections VK and RK 2 NPT Tab 1 Dimensions and connection sizes Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice 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 34 NPT 1 NPT Diameter GAS 1 NPT 4 NPT Tab 1 Dimensions and connection sizes 1 2 2 Specifications Observe all standards and guidelines appli 5 cable the installation and operation of the heating system in your country The informa tion on the boiler rating plate is definitive and it is imperative
9. 2 Air inlet T piece fitted horizontally or 90 elbow External wall 4 Roof 7 747 010 720 20 2RS Fig 14 Wall exit air supply pipe and exhaust 12 outlet external wall flue requires horizontally or verti cally mounted T piece observe clearances specified in Fig 11 3 Air intake terminal 90 elbow facing vertically down wards 4 External wall H Refer to NFPA54 ANSIZ223 1 National Fuel Gas Code for details Fig 15 Roof exit air supply pipe and exhaust 1 Flue outlet type of outlet depends on chosen manufac turer e g 90 elbow or T piece observe clearances specified in Fig 5 Airinletterminal 90 elbow pointing away from flue outlet Roof 7 747 010 720 21 2RS Fig 16 Roof exit air supply pipe wall exit exhaust 1 Flue outlet external wall flue requires horizontally mounted T piece or 90 elbow facing downwards Air inlet 90 elbow or T piece External wall Roof Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice 5 5 Venting system calculation sizing chart GB312 are Cat IV positive pressure induced draft condensing gas boilers Note Total equivalent lengths in tables 10 11 and 12 are guidelines and for reference only Please contact chimney manufacturer directly for specific chimney design Calculation example Calculate the vent pipe and combustion air pipe
10. Diameter for minus Connection Diameter Length of Vent one size diameter and two size diameter and at Boiler Linches TEL in feet TEL in feet GB312 90 328 B B 100 5 z 100ft 4 5bft GB312 120 440 6 6 100 5 80ft 4 30ft GB312 160 588 6 6 100 5 508 4 GB312 200 733 8 8 100 7 100ft 6 70ft GB312 240 881 8 8 100 7 100ft 6 55ft GB312 280 1029 8 8 100 7 100ft 6 35ft GB312 Venting System Table Combustion Air Cinlet Vertical Models Input MBH Combustion Combustion Total Equivalent Combustion Air Pipe Combustion Air Pipe Air Inlet Air Pipe Length of Combustion Diameter minus one Diameter minus two Connection Diameter Air Pipe max inch maximum TEL inch maximum TEL in at Boiler Linches in feet feet GB312 90 328 4 5 100 4 55ft 3 NA GB312 120 440 4 B 100 5 9bft 4 30ft GB312 160 588 4 B 100 5 50ft 4 GB312 200 733 8 100 7 1008 6 70ft GB312 240 881 4 8 100 7 100ft 6 55ft GB312 280 1029 4 8 100 7 100ft 6 35ft Note Breeching pressure measured at outlet of boiler vent connection Buderus Technical specifications are subject to change without prior notice Logano plus GB312 applications manual 12 2009 5 5 2 Vertical Vent and Horizontal Combustion Air Inlet Natural Gas See Figure 13 Operating Conditions Total flue amp combustion air supply system pressure 0 40 WC Vent calculated on 0 2
11. Factory installed jumper with AM10 Dark Green Dark Green White Netz Moue Netw ne I s peee PZB Boiler Circulator Power to Power to SAFe CM10 Module PS DHW Loading ry Pump Low water cut off dry contacts CM10 2 Boiler Cascade Module Brown Blue System Circulator System flow sensor PM White CT White D EE ED CE White AM10 Outdoor Reset Module White Biz Blue BUS On Off MESH 1 2 Stripe 7 Stripe EMS Bus Connection 1 to boiler 1 __ _ sensor gt Stripe Connection to end Switch on Multi Zone Switching EMSBus Reay Connection to boiler 2 See page 49 for piping diagram Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice AO E NDND euoz euoz uBiH duie A 021 vows ee sen ee 5 Aejay euoz OLIAV SS eS a 0c pue 6 9 Z 491109 uonoeuuo 1 1 l sng swa 1 Sjoejuoo yo yno MOT v 490g azd Josuag
12. are left open escaping flue gas can place lives at risk e Fill the trap with water or mineral oil on high temperature applications Sealthe trap and flue connections Make sure that the washer and seal are properly seated in the cap Condensate may possibly escape through the trap vent hole Attach the trap Besuretorun the drain pipe from the trap so that it slopes downwards Danger Risk of fatal injury from poisoning N The boiler s internal trap must be used make sure that the condensate from the flue system drains correctly A condensate neutralizer is available as an accessory Buderus part no NEO 1 Install the neutralizer according to the in stallation instructions e Fit the trap supplied to the condensate pan drain outlet Li 7 747 010 720 23 1RS Fig 19 Installing the condensate drain Trap Condensate pan Trap outlet to neutralizer waste pipe Trap vent Blanking cap Hole for condensate drain hose 6 5 Connecting the fuel supply Danger Risk of fatal injury from the explo N sion of flammable gases Work on gas components may only be carried out by qualified and authorized personnel 6 5 1 Installing gas supply piping For details of the
13. for the following Vertical vent and vertical combustion air pipe vent pipe 1 each 90 degree elbow 7ft equivalent length 1 each rain cap 10ft equivalent length 68 lineal feet of pipe 68ft equivalent length Total 8bft total equivalent length What size vent exhaust pipe is needed 5 diameter What size combustion air pipe is needed 5 diameter 5 5 1 Vertical Vent and Vertical Combustion Air Inlet Nat ural Gas See Figure 15 Operating Conditions Total flue amp combustion air supply system pressure 0 40 WC Vent calculated on 0 2 WC Combustion air calculated on 0 2 WC Min Gross Stack Temp 150 F e CO2 percentage NG 9 96 GB312 Venting System Table Vent Exhaust Outlet Vertical combustion air pipe 3 each 90 degree elbow 21ft equivalent length e 1 each inlet termination 10 equivalent length 50 lineal feet of pipe 504 equivalent length Total 81ft total equivalent length Venting Parameters Exhaust horizontal termination tee Exhaust vertical rain cap Sealed Comb Intake all models PVC piping with 90 downward elbow 90 elbow 7ft equivalent length 45 elbow 4ft equivalent length Rain cap termination 10ft equivalent length 1 lineal foot of pipe 1ft equivalent length Table 10 Models Input MBH Vent Venting Total Equivalent Vent Diameter for minus Vent
14. of 30 in Hg The boiler is factory set for Natural gas Note This series of boiler is not available for LP Liquid Propane There is no field retrofit kit available to convert this series boiler to LP gas Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice IE 0 2 Installing the boiler 21 Recommended wall clearances When deciding on the installation site the clearances for the flue piping and the connecting pipes must be observed OFig 9 and Section 5 1 Connecting the flue system and water and gas piping Dimension Wall clearance inch Recom minimum mended E 20 28 D B gt Th BY 22 28 1 7 C 20 28 spe p D 20 28 6 14 Tab 4 Recommended and minimum wall clearances SH dimensions in inches It is imperative that the minimum clearance dimension E is main tained 1 This clearance dimension is dependent on the flue system fitted A Where applicable allow extra wall clearances for additional components such as DHW NOTIS tank pipe connections or other flue Fig 5 Wall clearances in the boiler room components etc Notes multiple hoiler installations A Minimum clearance between boilers Refer to D dimensio
15. prior notice 11 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 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 flow return mating flange check valve Buderus Technical specifications are subject to change without prior notice Logano plus GB312 applications manual 12 2009 12 Dimensions and specifications 1 2 1 Logano plus GB312 dimensions 28 55 HH Tei 45 40 2 H 2414 1 4 Em 196 min pee B 7 747 010 720 02 3RS Fig 3 Connections and dimensions for Logano plus GB312 sizes in inches AA connection AL Combustion air pipe connection balanced flue opera tion only VK Boiler supply AKO
16. supplied to the boiler either through an external wall connection through a chimney flue or through a separate pipe in the chimney flue For balanced flue operation a suitable air supply system must be used made of PVC or CPVC or galvanized steel The flue and air supply system for design of flue connection Section 6 page 21 must be designed for a max pressure of 0 40 inches W C for the overall system exhaust and air supply system H We recommend that the air supply pipe diameter matches the flue pipe diameter Boiler rat Required air supply Recommended air supply ing volumetric flow rate pipe diameter ft min inches 90 4 95 5 120 4 95 6 160 5 130 6 200 6 160 8 240 7 190 8 280 8 220 8 Tab 9 Air supply volumetric flow rate Air supply pipe diameter 7 747 010 720 14 2RS Fig 9 Vertical flue system Roof penetration Fire protection collar Fastening the flue pipe Flue pipe adaptor available separately Remove the side panel if not already removed Unscrew the cover plate from the rear panel S 7 747 010 720 15 2RS Fig 10 Connecting the air supply for balanced flue operation 1 Screw 2 Cover plate H Connect the air pipe 90 elbow to the air pipe socket through the rear panel and seal Construct the air supply pipe using a standard air pipe system according to the national requi
17. systems Installing a dirt trap like an WYE strainer and a desludging device is required This must be installed in the heating System in the immediate vicinity of the boiler in an easily accessible position between the boiler and the lowest point in the return of the system and cleaned at every annual service p Pump PK yo 1 N 4 Fig 7 WYE Strainer location 1 WYE Strainer Technical specifications are subject to change without prior notice Logano plus GB312 applications manual 12 2009 3 3 Water hardness Use only clean municipal water to fill the system In order to protect the appliance against limescale damage over its entire service life and in order to ensure trouble free operation the total amount of limescale forming substances in the first fill and replenishment water used in the heating system must be limited 3 4 Checking the maximum quantity of first fill water based on water quality To check the permissible water quantities based on water quality either use the following calculation methods or consult the graphs USER NOTE If the system capacity exceeds the calcu lated allowable water volume V max damage to the boiler can result Calculation basis The first fill and replenishment water has to meet certain requirements that are dependent on the total boiler output and
18. 2 280 Pipe A 3 4 4 4 5 6 Pipe B 25 3 4 4 4 4 Pipe t 2 27 3 3 4 4 Pipe D 2 25 25 3 3 Header E 3 4 4 5 6 Four GB312 System 36 F Delta T Recommended Near Boiler Piping Size Table 19 Models GB312 90 GB312 120 GB312 160 GB312 200 GB312 240 GB312 280 Pipe A 25 3 gim 4 2 277 25 3 3 a Pipe 2 2 25 25 25 3 Pipe D 2 2 2 25 Header E 25 3 3 See Sections 10 1 10 2 Tables 17 to 20 for Boiler pump LLHeader Hydro Seperator selections Buderus Technical specifications are subject to change without prior notice Logano plus GB312 applications manual 12 2009 SSSSa_SS 7 CSD 1 Kit Call Bosch Thermotechnology Corp to order the pair of gas line pressure switches 1H P 1L P The part number to order is 7747019985 for both Low pressure switch part number is C6097A1061 High pressure switch part number is DG15CTG15W Low water cut out LWCO and Hi Limit manual reset switches to be ordered seperately Part numbers are the following LWCO 550 Hi Limit L4006E1109 High Pressure Switch location set point 2 WC Nat Gas NOTE t works on a zero pressure regulated combination gas valve f the pressure regulator inside the combination gas valve fails the H P sw
19. 21 Models 60 Vol CO ppm af GB312 90 min max load 9 1 9 1 lt 100 GB312 120 min max load 9 1 9 1 lt 100 GB312 160 min max load 9 1 9 1 lt 100 GB312 200 min max load 9 1 9 1 lt 100 GB312 240 min max load 9 1 9 1 lt 100 GB312 280 min max load 9 1 9 1 lt 100 Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice 11 3 1 Set BC10 control to flue gas test operation The button is used by the heating engineer for the flue gas test The control system runs the heating at a raised flow temperature for 30 minutes During the flue gas test the decimal point on the status display lights up Press and hold the button until the decimal point on the status display lights up at least 2 seconds to chancel the flue gas test the button has to be pressed again 11 3 2 Opening the Service menu and viewing monitor data on the RC35 e Simultaneously press the buttons to open the SERVICE MENU e Turn the rotary selector counter clockwise to select Diagnosis indicated by gt e Press the button to open the SERVICE DIAGNOSIS menu c e Turn the rotary selector Monitor reading indicated by gt e Press the button to open the DIAGNOSIS MONITOR READING menu e Turn the rotary selector C counter clockwise to select Boiler Burner indicated by e Press the button to open the BOILER BURNER me
20. 29 Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice 1 Product description The Logano plus GB312 Fig 1 is supplied with a fully factory fitted and ready wired Logamatic BC10 basic programmer 10 2D tee 7 747 010 720 01 2RS Fig 1 Logano plus 68312 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 B kit with flow check valve supplied as standard not fac tory installed Gas isolating valve supplied as standard not factory installed 11 Mating flange 27 included in B kit not factory installed The main components of the Logano plus 68312 OFig 1 are Programmer Item 1 Frame and casing Item 8 Boiler heat exchanger with insulation Item 5 Gas burner Item 2 B kit standard B kit comprising temperature pressure gauge pressure relief valve supply manifold mating flange for flow return piping not factory installed Gas isolating valve Item 10 The programming unit monitors and controls all electrical boiler components The boiler heat exchanger transfers the heat generated by the burner to the heating water The thermal insulation reduces rad
21. 30ft GB312 160 588 4 6 100 5 50ft 4 GB312 200 733 4 8 100 7 100ft 6 70ft GB312 240 881 8 100 7 100 6 55ft GB312 280 1029 8 100 T 658 6 35ft Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice G Piping the boiler 6 1 Connecting central heating supply Fit and seal the heating system supply pipe to the threaded flange supplied Insert the seal in the flange joint and tighten the bolts evenly Boiler warranty is null and void unless the check valve is properly installed and maintained in conjunction with supply manifold 2 VK 1 5 4 NPT iN i H jm fir j F d hz 6 3 Note 2 Flow Direction Arrow 7 747 010 720 04 1RS Fig 17 Fitting the B kit and supply pipe Pressure relief valve Supply pipe external with NPT thread Pressure temperature gauge Threaded flange 27 NPT female Check valve observe direction of flow J Gasket VK Boiler supply B Kit Parts list Quantity Description 1 Supply Manifold 4 2 Pipe Size Gaskets 1 Check Valve 1 Pressure and Temperature Gauge 1 Relief Valve 50psi 12 Nuts 8 Bolts x 2 L 4 Bolts Ye 5 L 24 Washers 5s 12 Lock Washers Buderus 6 2 Fitting the heating system re
22. 480 870 1400 150 120 250 380 710 1130 Tab 14 Gas pipe delivery rate 1 Maximum gas pipe delivery rate in cu ft hr based on a gas spe cific gravity of 0 60 and a gas pressure of 0 5 psi orless and a pressure drop equivalent to a water column of 0 3 inches Iron pipe Equivalent lengths for pipe fittings nominal in feet diameter in Pipe fitting type inches 90 T piece Shutoff Gas elbow valve cock Equivalent lengths in feet 1 3 5 0 6 1 60 1 4 6 0 8 2 15 1 5 7 1 0 2 50 2 7 10 1 3 3 00 2 8 12 1 6 3 50 Tab 15 Equivalent lengths for pipe fittings Disconnect the boiler and its gas isolating valve from the gas supply pipe system if that system is subjected to pressure tests in which the testing pressure exceeds 75 psi If the gas supply piping system is subjected to pressure tests in which the testing pressure is 75 psi or less it is sufficient to isolate the boiler from the gas supply piping system by closing the relevant isolating valve Test the boiler and gas supply connections for leaks before commissioning 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 Technical specifications are subject to change without prior notice Logano plus GB312 applications manual 12 2009 For piping details see Section 6 1 6 6 1 Three Boiler
23. Applications Manual 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 Logano plus GB312 Buderus Buderus Technical specifications are subject to change without prior notice Logano plus GB312 applications manual 12 2009 Table of Contents 1 Product description 4 7 CSD 1 Kit 31 11 Package contents 6 7 1 Operating Addendum for the 68312 in High 1 2 Dimensions and specifications 7 Temperature Applications 33 2 installing t
24. Tech Fasnseal GB312 90 to GB312 160 FSA GB312 6 6 nominal size GB312 200 to GB312 280 FSA GB312 8 8 nominal size Security Chimney Cl System GB312 90 to GB312 160 thd 6 nominal size 08312 200 to GB312 280 thd 8 nominal size CPVC flue system for U S A only CPVC Manufacturer Specification Manufacturer CPVC Starter Adapter Part No Heatfah 08312 90 to GB312 160 S6GBCPVC ADAPTER 6 nominal size 6B312 200 to GB312 280 S8GBCPVC ADAPTER 8 nominal size GB312 90 to GB312 160 2SVSGBPOG 6 nominal size GB312 200 to GB312 280 2SVSGBP08 8 nominal size Spears CPVC pipe to Schedule 80 ASTM D1784 L Flex Metal Fab 6B312 90 to GB312 160 GCGBPA 6 nominal size GB312 200 to GB312 280 8CGBPA 8 nominal size Pro Tech GB312 90 to GB312 160 FSA GB312 6 PVCF 6 nominal size GB312 200 to GB312 280 FSA GB312 8 PVCF 8 nominal size Security Chimney GB312 90 to GB312 160 thd 6 nominal size GB312 200 to GB312 280 thd 8 nominal size Note Please contact the manufacturers listed above to order If a plastic system CPVC is used in Canada it must be approved as a type BH gas venting system ULC S636 The components adhesives and adhesive primers specified by the flue system manufacturer must be used Only components adhesives adhesive primers etc made by the same manufacturer may be used The following flue system is appro
25. WC Combustion air calculated on 0 2 WC Min Gross Stack Temp 150 F CO2 percentage NG 9 GB312 Venting System Table Venting Parameters Exhaust horizontal termination tee Exhaust vertical rain cap Sealed Comb Intake all models PVC piping with 90 downward elbow 90 elbow 71 equivalent length 45 elbow 41 equivalent length Rain cap termination 10ft equivalent length 1 lineal foot of pipe 1ft equivalent length Vent Exhaust Outlet Vertical Table 11 Note Breeching pressure measured at outlet of boiler vent connection 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 TEL feet TEL in feet GB312 90 328 B B 100 5 100ft 4 55ft GB312 120 440 B B 100 5 80ft 4 30ft GB312 160 588 B B 100 5 50ft 4 NA GB312 200 733 8 8 100 1 100ft 6 70ft GB312 240 881 8 8 100 1 100ft B 55ft GB312 280 1029 8 8 100 7 100ft 6 35ft GB312 Venting System Table Combustion Air Cinlet Horizontal Models Input MBH Combustion Combustion Total Equivalent Combustion Air Pipe Combustion Air Pipe Air Inlet Air Pipe Length of Combustion Diameter minus one Diameter minus two Connection Diameter Air Pipe max inch maxim
26. ance of the heating system is carried out by an unqualified person this may result in danger to life and limb or property damage These instructions must be followed precisely Contact a qualified service company service provider or the gas company if support or additional information is required 11 1 1 Input Rates Input rates for elevations 0 12 000ft A S L CP Models Input rate Mbtu hr 08312 90 328 GB312 120 441 GB312 160 588 GB312 200 733 GB312 240 881 GB312 280 1029 11 2 Adjustments The high altitude adjustment of the GB312 boiler series consists of two adjustment steps 1 CO2 adjustment of the burner by changing the setting of the automatic gas valve 2 Correction of the fan speed curve of the burner 11 3 CO adjustment of the burner adjustment of the gas valve The level of the burner has to be adjusted by using CO CO meter accordingly to the following instruction steps see CO values in Table 21 below For boiler commissioning procedures please see Installation and Maintenance Manual chapter 7 page 41 The CO level in the flue gas has to be less than 100ppm air free If a setting of 9 1 Vol and CO level under 100ppm af is not possible due to the used natural gas a lower CO level with CO emissions under 100ppm af has to be adjusted CO CO levels for elevations 0 12 000ft A S L Table
27. atment It explains with the aid of an example how to make the necessary calculations and record the figures A record book table is included at the end of this chapter This operator s log is intended for the system user as well as qualified heating engineers who as a result of their training and experience are skilled in dealing with heating systems Warranty claims in respect of GB312 boilers are only valid in conjunction with the requirements specified herein and properly completed annual service records in the operator s log and the servicing and maintenance log 3 1 Maintenance of user manual In addition to the quantity of first fill and replenishment water added to the system you should also record its calcium carbonate CaCO3 concentration hardness in this log book See page 15 Buderus 3 2 Prevention of damage hy corrosion Additional protection against corrosion Corrosion damage occurs if oxygen constantly enters the heating water due for example to undersized expansion vessels faulty expansion vessels open vented systems If the system cannot be constructed as a sealed system anti corrosion measures such as system separation by means of a heat exchanger are necessary USER NOTE e f the appliance is installed in an existing heating system dirt may accumulate in the boiler leading to localized overheating corrosion and noise Alway install a WYE STRAINER in existing heating
28. e Venting Parameters Exhaust horizontal termination tee Exhaust vertical rain cap Sealed Comb Intake all models PVC piping with 90 downward elbow 90 elbow 7ft equivalent length 45 elbow 41 equivalent length Rain cap termination 10ft equivalent length 1 lineal foot of pipe 1ft equivalent length Vent Exhaust Outlet Horizontal Table 13 Note Breeching pressure measured at outlet of boiler vent connection 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 Linches TEL in feet TEL in feet 08312 90 328 6 6 100 5 1008 4 408 GB312 120 440 6 6 100 5 75ft 4 GB312 160 588 6 6 100 5 4 GB312 200 733 8 8 100 7 100ft 6 45ft GB312 240 881 8 8 100 7 100ft 6 NA GB312 280 1029 8 8 100 7 658 6 58312 Venting System Table Combustion Air inlet Vertical Models Input MBH Combustion Combustion Total Equivalent Combustion Air Pipe Combustion Air Pipe Air Inlet Air Pipe Length of Combustion Diameter minus one Diameter minus two Connection Diameter Air Pipe max inch maximum TEL inch maximum TEL in at Boiler in feet feet GB312 90 328 4 5 100 4 551 3 NA GB312 120 440 4 B 100 5 95ft 4
29. e flue system manufacturer must be followed Use only flue pipes with the appropriate di ameter for the output rating of the boiler and made by the recommended manufacturers listed in Table 6 7 or 8 Flue system for multi boiler systems cascading systems These instructions relate only to single boiler systems Flue air supply systems for multi boiler systems must be designed by qualified heating engineers and approved and guaranteed by the flue system manufacturer The flue system must prevent back flow of flue gas through boilers that are not in operation to cure for 24 hours before commissioning the boiler Danger Risk of fatal injury from escaping N flue gases in the boiler room The seal in the condensate pan flue con nection must be present undamaged and correctly inserted Fitting a barometric damper in the flue system is not permitted In the case of exhaust systems sealed with silicon from a cartridge the slilicon must be allowed Buderus Caution Risk of system damage due to in adequate condensate drainage Thecondensate that forms in the flue pipe must be drained away from the boiler via the condensate drain on the condensate pan Always use a condensate neutralizer Provide periodic maintenance to the condensate drain piping and neutralizer system to ensure proper operation Caution Risk of system damage due to in adequate condensate drainage In high temperature ap
30. es introduced into the heating system water must be approved by the manufacturer for use with aluminum boil ers When is water treatment necessary If the quantity of fill water actually needed is less than Vmax untreated water may be introduced If the quantity of fill water actually needed is more than Vmax water treatment is necessary To reduce the amount of scale the two approved additives Noble Company Noburst AL and RhoGard may be used this products are also used as antifreeze They can reduce the amount of scale introduced by the fill water by 50 and 60 respectively Do not use water from salt bedding type exchangers ion exchanger used to soften water Buderus Technical specifications are subject to change without prior notice Logano plus GB312 applications manual 12 2009 3 6 Operator s log Details of GB312 heating system Date commissioned Max water Vmax gal at CaCO concentration of Anti freeze product used Rhomar Rho Gard 50 60 Concentration Noble Company Noburst AL 50 Concentration Date Water volume unthreated measured gal CaCOs concentrati on ppm Total water volume unthreated gal Concentration of anti freeze in system Company stamp Signature Total fill water in gal Added water in gal Bude
31. gents that contain chlorine or halogenated hydrocarbons e g in spray cans solvents and cleaning agents paints glues Donot store or use such substances in the boiler room Avoid excessive dust accumulation If impurities in the combustion air are possi ble e g installation near swimming pools dry cleaners or hairdressing salons operation independent of room air is recommended H Buderus Caution Dangers posed by explosive and N easily combustible materials Donotuseor store easily combustible ma terials paper lace curtains clothing thin ners paints etc near the boiler e Maintain clearance of 16 inches from the boiler Overall air supply within the building Make sure that the boiler room has two permanent air vents that are connected to one or more other rooms When calculating the cross sectional areas of the vent apertures the total burner output of all gas fired appliances in the connected rooms must be taken into account Each vent must have a minimum cross section of one square inch per 1000 Btu h of the total burner output of all gas fired appliances inside the connected rooms Make sure that the cross sectional area of each vent is at least 100 square inches One of the vents must be no more than 12 from the ceiling and the other no more than 12 from the floor of the boiler room measured from the outer edge of the vent aperture The smallest dimension of all inlet and outlet ve
32. h aad heating hot water oF 180 180 High temperature cut out safety limit manual reset high limit setting p 200 Boiler size output no of heat exchanger sec tions Unit 90 4 120 4 160 5 200 6 240 7 280 8 Permissible operating pressure psi 50 Electrical data Enclosure class IP 40 Mains power supply V Hz 120V 60Hz Power consumption max load 84 150 190 230 270 370 min load 40 40 45 50 50 50 Maximum permissible fuse rating A 10 slow blow Appliance dimensions and weight Ed clearance dimensions width x depth x inches 34x25x60 42x25x60 50x25x60 Weight Ibs 455 530 585 665 730 Tab 2 Specifications Buderus Technical specifications are subject to change without prior notice Logano plus GB312 applications manual 12 2009 100 904 10 m 120 4 A 160 5 200 6 X 240 7 280 8 0 1 1 10 100 1000 x E 7 747 010 720 30 1RS Fig 4 Primary circuit flow resistance GB312 with check valve x Flow rate in gal min GPM y Primary pressure drop in psi Boiler rating Gas flow rate Natural gas Calorific value 1075 BTU ft 90 4 324 6 120 4 4344 160 5 579 0 200 6 720 6 240 7 868 8 280 8 1013 4 Tab 3 Gas flow rate based on gas temperature of 60 F and air pressure
33. h 18 F or 36 F Delta T Se pes edid 5 p peeoxe 30 15 e2uejsiq ENN Buderus Technical specifications are subject to change without prior notice Logano plus GB312 applications manual 12 2009 13 Pump amp low loss header hydro seperator selection 13 1 Pump selection based on delta T dT 10 C 18 F Single Boiler Installation Table 24 BOILER DATA BOILER PUMP SELECTION HYDRO SEPERATOR Models Flowrate Boiler Check valve Grundfos B amp G pump Taco pump Caleffi Sinus Nominal Size gal min pressure pressure pump selection selection Hydro Hydro drop drop selection seperator seperator PSI PSI selection selection GB312 90 30 34 0 3 UP26 99 607 1400 20 548082A 7 26 200 3 Flanged GB312 120 GB312 160 4 6 UPS40 40 UPS40 80 4 1400 65 1400 70 548082A 548082A 1 26 200 1 26 200 3 Flanged 3 Flanged GB312 200 15 5 2 0 9 UPS50 80 4 6095 1400 70 548102A 1 26 250 4 Flanged GB312 240 90 5 2 1 2 UPS50 80 4 6115 1632 548102A 1 26 250 4 Flanged GB312 280 106 5 5 17 UPS80 80 612S 1632 548102A 1 26 250 4 Flanged dT 20 C 36 F Single Boiler Installation Table 25 BOILER DATA BOILER PUMP SELECTION HYDRO SEPERATOR M
34. he boiler 10 8 Internal boiler wiring diagram 34 2 1 Recommended wall clearances 10 22 Leveling the boiler 11 9 9 wiring diagram 35 Water quality requirements 12 10 Sequence of operations 36 31 Maintenance of user manual 12 3 2 Prevention of damage hy corrosion 12 3 3 Water hardness 13 5 34 Checking max quantity of first fill water based 11 High altitude adjustment 37 on water quality 13 3 5 pH requirements 13 In 3 6 Operator s log 15 11 2 Adjustments 37 11 3 60 adjustment of the burner adjustment of the gas valve 37 11 4 Setting for speed of burner fan 40 4 Openings for combustion air supply amp venting 16 12 Examples of installations 42 12 1 Legend 42 5 12 2 Single boiler systems 43 5 Venting requirements 17 12 3 Multiple boiler systems 49 5 1 Connecting the air supply for direct vent operations 19 5 2 Installing the wall exit for air supply pipe 19 5 3 Installing the roof exit for air pipe 20 5 5 4 Design of flue and air pipe for balanced flue operation 13 Pump and low loss header selection 37 refer to NFPA54 ANSIZ223 1 for dimensions 21 P 13 1 Pump amp low loss header hydro separator selection 5 EMIT 13 2 Low loss header selection per manufacturer 58 6 Piping the boiler 26 6 1 Connecting central heating supply 26 6 2 Fitting the heating system return 26 6 3 Installing the DHW Tank 26 6 4 Installing the condensate drain 26 6 5 Connecting the fuel supply 27 6 6 Pipe sizing
35. iant and standby heat loss Buderus Technical specifications are subject to change without prior notice Logano plus GB312 applications manual 12 2009 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 8 Burner LED ON OFF 9 Socket for connecting diagnostic plug 10 Status display button 11 Flue gas test button 12 Reset button NOU Logamatic BC10 basic programmer OFig 2 The Logama tic BC10 basic programmer enables basic operation of the heating system It provides functions such as the following for that purpose Turning the heating system on off Setting the DHW temperature and the maximum boiler temperature in heating mode Status display On overall picture of the controls of the Logamatic BC10 basic programmer can be obtained from Fig 2 Many other functions for the convenient control of your heating system are available with a programming unit such as the RC35 The RC35 is to be used as a master control as well as a boiler service tool Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without
36. itch will cut out during burner operation 7747101925 02 Zuluft Venturi VM312 US Fig 21 Airinlet venturi GB312 US Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice Low Pressure L P Switch location Setpoint 3 WC Nat Gas NOTE The minimum gas supply pressure is 3 5 WC 7747101926 02 Gasarmatur VR4730 Gasanschlussrohr VM312 US Fig 22 Gas valve VR4730 gas connecting pipe GB312 US Pressure Relief Valve 240 gt Supply i 1 Connection T i at Boiler Sy d CS Z A Mating Flange 2 NPT female connection Check Valve Supply Manifold Item Buderus no P part number 210 Low water cut off SAFGARD 3 4 M 550 240 High temperature cut off 3 4 M L4006E1109 Fig 23 Boiler Supply Manifold and Controls Buderus Technical specifications are subject to change without prior notice Logano plus GB312 applications manual 12 2009 7 1 Operating Addendum for the GB312 in High Temperature Applications It is extremely important that the default post purge for the boiler pump be left alone The default setting is 5 minutes post purge This setting may be accessed in the service level of the BC10 controller The setting may be increased if needed but may NOT be decreased This will ensure that the boiler does not exceed the safety limit rega
37. ler system fluid is 7 0 to 8 5 pH must be checked and recorded at each yearly maintenace in order to keep the warranty valid Failure to do so will immediately void the warranty on the heat exchanger Adjusting pH if it is out of range 7 0pH to 8 5pH Flush system with fresh municipal water run the system up to temperature for an hour and check pH OR Add Rhomar Protek 922 to the system at a volume of 1 gallon of Protek 922 to 25 gallons of system volume Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice Limit curves As an alternative to calculation the Vmax figure may be taken from the following graphs 2000 4 280 1900 poze 1800 1700 1 240 7 1600 4 1500 1400 5 200 6 1300 1200 1100 1605 1000 4 900 800 1 120 4 Vmax gallon 700 4 1 90 4 600 500 4 400 300 200 100 4 hardness CaCO ppm or mg l 0 50 100 150 200 250 300 350 400 450 500 550 7 747 010 722 01 1RS Fig 2 Water treatment limit curv es for the various boiler sizes The rule for V max is Above the limit curve water treatment necessary Below the limit curve no water treatment necessary Units 1ft 3 7 48 gallon 1ppm 1 1 grain gal 17 1 pm or mg l USER NOTE i Any additiv
38. n for side by side installations Refer to B and E dimension for back to back installations B See Table 4 for all other clearance dimensions Buderus Technical specifications are subject to change without prior notice Logano plus GB312 applications manual 12 2009 2 2 Leveling the boiler To prevent air collecting in the boiler and to allow the condensate to drain freely from the condensate pan the boiler must be leveled Caution Risk of boiler damage due to inad N 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 The boiler may stand on a base made of combustible material but not on carpet Place the boiler in its final position Level the boiler horizontally by turning the adjustable feet and using a spirit level 7 747 010 720 10 188 Fig 6 Leveling the boiler 1 Adjustable feet 2 Spirit level Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice 3 Water quality requirements Poor water quality can damage heating systems due to scale formation and corrosion About this chapter This operator s log contains important information regarding the treatment of water for boilers containing aluminium materials This document shows you how to keep a log of water tre
39. n to the outside through a ventilated attic and ventilated crawl space each opening must have a minimum cross section of one square inch per 4000 Btu h The attic must be ventilated at both ends of the house Technical specifications are subject to change without prior notice Logano plus GB312 applications manual 12 2009 5 Venting requirements This chapter details how to install the boiler The steps are Exhaust and air supply system Heating circuit connection Connecting the fuel supply Making the electrical connections General notes The boiler requires a flue system approved for Category IV condensing positive pressure to ANSI 221 13 CSA4 9 The material must consist of 316L or AL 29 4C stainless steel and conform to UL 1738 or UL 103 In Canada flue system material must conform to ULC 636 We recommend flue systems made by the following manufacturers Stainless steel flue system for U S A and Canada Table 6 Manufacturer Flue System AL29 4C Starter Adapter Part No Heatfah Saf T Vent EZ Seal GB312 90 to GB312 160 9601GB ADAPTER 6 nominal size GB312 200 to GB312 280 9801GB ADAPTER 8 nominal size 1 Z Vent IV special gas vent GB312 90 to GB312 160 2SVSGBAOB 6 nominal size GB312 200 to GB312 280 2SVSGBA08 8 nominal size Metal Fab Corr Gaurd 6B312 90 to GB312 160 GCFGBA 6 nominal size GB312 200 to GB312 280 8CFGBA 8 nominal size Pro
40. nts must be not less than 3 Total air supply from outside the building Make sure that the boiler room has two permanent air vents one of which must not be more than 12 from the ceiling and the other not more than 12 from the floor of the boiler room measured from the outer edge of the vent aperture The vents must be connected either directly or via air ducts to the outside or to rooms that have an unob structed connection to the open air crawl passage or roof space The smallest dimension of all inlet and outlet vents must be not less than 3 If there is a direct connection to the outside each opening must have a minimum cross section of one square inch per 4000 Btu h of the total combustion output of all gas fired appliances inside the closed room If there is a connection to the outside through a ventilated attic with vertical ventilation ducts each vent aperture must have a minimum cross section of one square inch per 4000 Btu h of the total burner output of all gas fired appliances inside the closed room The attic must be ventilated at both ends of the house If there is a connection to the outside through horizontal ventilation ducts each vent aperture must have a minimum cross section of one square inch per 2000 Btu h of the total burner output of all gas fired appliances inside the closed room The duct cross sectional area must not be smaller than the free area of the inlet If there is a connectio
41. nu The monitor readings are displayed as a list i e turning the selector scrolls down to more readings These menus enable you to read off the current boiler output set actual Buderus counter clockwise to select Fig 24 Starting the flue gas test quick operation settings gt diagnosis servicing SERVICE DIAGNOSIS function test nonitor reading diagnosis servicing DIAGNOSIS READING gt Boiler Burner domestic hot water heating circuit 1 bus users Technical specifications are subject to change without prior notice Logano plus GB312 applications manual 12 2009 11 3 3 Adjusting and checking level at maximum output Read off output on RC35 e Wait until output reaches at least 70 Insert the sensor through a testing hole in the flue pipe into the center of the gas flow e Adjust the level to 9 1 using the high output adjusting screw Fig 25 item 1 Do not exceed CO limit given in Table 21 Turning the screw clockwise reduces the level Turning the screw counter clockwise increases the level 11 3 4 Adjusting and checking level at minimum output Set to 30 To do so press and hold the button until the decimal point on the status display lights up at least 2 seconds This turns on the flue gas test e Simultaneously press and hold the and buttons for approx 5 seconds At the factory setting the display sho
42. nus Nominal Size Flowrate Hydro seperator gal min selection up to 115 gpm 4 71 26 250 4 Flanged up to 190 gpm 5 71 26 300 5 Flanged up to 250 gpm 6 7 26 400 6 Flanged up to 375 gpm 8 7 26 450 8 Flanged up to 480 gpm 8 7 26 500 8 Flanged up to 745 gpm 10 1 51 218 10 Flanged up to 1 030 gpm 12 1 51 220 12 Flanged upto 1 320 gpm 14 1 51 222 14 Flanged Buderus Technical specifications are subject to change without prior notice Logano plus GB312 applications manual 12 2009 Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice Bosch Thermotechnology Corporation 50 Wentworth Avenue Londonderry NH 03053 Tel 603 552 1100 Fax 603 584 1681 www buderus net Products manufactured by Bosch Thermotechnik GmbH Sophienstrasse 30 32 D 35576 Wetzlar www buderus de Bosch Thermotechnology Corporation reserves the right to make changes without notice due to continuing engineering and technological advances BTC 431001102 B 12 2009 Buderus Bosch Group
43. odels Flowrate Boiler Check valve Grundfos B amp G pump Taco pump Caleffi Sinus Nominal Size gal min pressure pressure pump selection selection Hydro Hydro drop drop selection seperator seperator PSI PSI selection selection GB312 90 15 0 9 0 1 UP15 42 6075 1400 10 548052A 7 25 120 2 Flanged GB312 120 23 1 2 0 2 UP26 64 607S 1400 10 548052A 7 25 120 2 Flanged GB312 160 30 1 2 0 2 UP26 99 607S 1400 20 548082A 7 26 200 2 Flanged GB312 200 37 1 3 0 2 UPS32 40 607S 1400 20 548082A 7 26 200 3 Flanged GB312 240 45 1 3 0 3 UPS40 40 607S 1400 40 548082A 7 26 200 3 Flanged GB312 280 53 1 4 0 4 UPS40 40 608S 1400 45 548082A 7 26 200 3 Flanged Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice 13 2 Low loss header selection per manufacturer CALEFFI Multiple boiler applications Table 26 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 NA548102A 548102A 4 Flanged up to 300 gpm 5 NA548120A not offered 5 Flanged up to 484 gpm 6 NA548150A not offered 6 Flanged up to 792 gpm 8 NA548250A not offered 8 Flanged up to 1 330 gpm 10 NA548300A not offered 10 Flanged up to 1 850 gpm 12 NA548300A not offered 12 Flanged SINUS Multiple boiler applications Table 27 Combined Mains pipe size Si
44. on 2007 11 Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice iagram iring 9 MC10 w odwog Sd yue uogenop A VOL Gunes ssiuued 7H09 A0ZL suen 1 N Se zHo9 oz zd 7H09 uogpunj Ajddne a 823 qun evs pete MHa jddns samod suey W E am oN 73 2 MP T _ WOM seowep Ajayes 104 1 1 Suum 4 I oil dy es CL Da LE B Ll mmc muc ES _2 DEN pue 101 u09 5 jueuidinbe 2524 yun 104 uon2euuoo 945 SUW yun 4euunq au sejqesip sef H a Bunaeuuoo 10 Ajayes yun 0 2 104 uor2euuoo sun 104 uon2euuoo sur BuiBueuo xue wt yams JHO NO Aem 2 gt 9 o 3102412 uiejsAs 10 Ajddng
45. on Diameter Length of Vent one size diameter and two size diameter and at Boiler linches TEL in feet TEL in feet 08312 90 328 B B 100 5 100ft 4 40ft GB312 120 440 B B 100 5 75ft 4 NA GB312 160 588 B B 100 5 4 GB312 200 733 8 8 100 1 100ft 6 45ft GB312 240 881 8 8 100 7 1008 6 GB312 280 1029 8 8 100 7 65ft 6 NA GB312 Venting System Table Combustion Air Cinlet Horizontal Models Input MBH Combustion Combustion Total Equivalent Combustion Air Pipe Combustion Air Pipe Air Inlet Air Pipe Length of Combustion Diameter minus one Diameter minus two Connection Diameter Air Pipe max inch maximum TEL inch maximum TEL in at Boiler linches in feet feet GB312 90 328 5 100 4 408 3 NA GB312 120 440 B 100 5 75ft 4 GB312 160 588 4 6 100 5 NA 4 NA GB312 200 733 4 8 100 7 100ft 6 45ft GB312 240 881 4 8 100 7 100ft 6 NA GB312 280 1029 4 8 100 7 65ft 6 NA Technical specifications are subject to change without prior notice Logano plus GB312 applications manual 12 2009 5 5 3 Horizontal Vent and Vertical Combustion Air Inlet Natural Gas See Figure 16 Operating Conditions Total flue amp combustion air supply system pressure 0 40 WC Vent calculated on 0 2 WC Combustion air calculated on 0 2 WC Min Gross Stack Temp 150 F CO2 percentage NG 9 GB312 Venting System Tabl
46. plications it is necessary to use mineral oil in the condensate trap to maintain a trap seal so CO gases do not escape into the boiler room Caution Disruption of operation dueto high wind If no T piece or 90 downward turned elbow is fitted on the end offlue pipe high winds may cause the boiler to shut down Always make sure that there is a T piece or a 90 downward tumed elbow fitted depending on the design of the flue system Useonly a T piece or 90 downward turned elbow Category IV made by the selected flue system manufacturer With regard to possible restrictions and in spections for flue systems consult the local building and fire safety authorities Observe the national regulations In the Commonwealth of Massachusetts the legal requirements concerning the installation and maintenance of carbon monoxide detectors must be followed Danger Risk of fatal injury due to poisoning by escaping flue gas After carrying out any of the installation in structions referred to check that all con nections throughout the entire flue system are properly joined and sealed Check seams and joints for leaks Have the entire flue system checked once a year by a qualified heating contractor Technical specifications are subject to change without prior notice Logano plus GB312 applications manual 12 2009 5 1 Connecting the air supply for direct vent operations The combustion air is
47. rdless of system flow rates when using a ASME CSD1 high temperature cut off at the boiler supply Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice iagram iring internal w ler c PWM FAN IONIZATION IGNITOR Buderus DUAL VALVE COMBINATION NOTE Blocked Air Pressure Switch GB312 90 to 160 Off 1 6 GB312 200 to 280 Off 24 WC On 2 24 WC SOCKET NOT 90 7 EE 120V AC i mm E 0 amp E m c a BOILER HIGH LIMIT TEMPERATURE SENSOR RETURN FLOW TEMPERATURE SENSOR Reviewed 7365 Wiring diagram gas boiler GB312 USA CD Drwg no NOTE Blocked Vent Pressure Switch GB312 all models Off 1 6 WC On 1 48 WC NOTE Safe Gas Pressure Switch NG GB312 all models Off 3 WC On 2 75 WC NO adjustments necessary or possible on all pressure sensors PRESSURE CONTROL SET je WATER ge 1 BLOCKED AIR PRESSURE PRESSURE SENSOR SWITCH gs LOW GAS PRESSURE SWITCH OPTIONAL 416 2 Lblack IN CASE OF CONNECTION white __ REMOVE JUMPER 3 4 3 WC Setpoint HIGH GAS PRESSURE SWITCH OPTIONAL IN CASE OF CONNECTION REMOVE JUMPER 5 6 2 WC Setpoint SAFE GAS PRESSURE TS 1 1 63 SWITCH hg BLOCKED VENT PRESSURE SWITCH pl SUPPLY FLOW TEMPERATURE SENSOR GB312 USA CD Wiring diagram 7747019193 Editi
48. recommended Near Boiler Piping Size Three GB312 System 18 F Delta T Recommended Near Boiler Piping Size Table 16 Models GB312 90 GB312 120 GB312 160 GB312 200 GB312 240 GB312 280 Pipe A 3 a Pipe 2 2 3 a Pipe C 28 27 27 27 3 Header E 2 3 4 4 4 Three GB312 System 36 F Delta T Recommended Near Boiler Piping Size Table 17 Models GB312 90 6B312 120 GB312 160 GB312 200 GB312 240 GB312 280 Pipe A 2 3 3 2 2 27 2y 3 Pipe C 2 2 2 Header E 2 27 27 3 3 4 See Sections 10 1 and 10 2 Tables 17 to 20 for Boiler pump PK and LLHeader Hydro Seperator selections System Supply lt System Return Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice 6 6 2 Four Boiler recommended Near Boiler Piping Size R gt System gt 2 B A el Supply pi c 4 4 gt Four 18312 System 18 F Delta Recommended Near Boiler Piping Size Table 18 Models GB312 90 GB312 120 GB312 160 GB312 200 GB312 240 GB31
49. rements After making the connection at the boiler increase air supply pipe to sizes shown in Table 9 external to boiler Use a 90 elbow for the combustion air inlet at the entrance to the boiler to avoid an interference with the gas connection We recommend the fitting of a protective grille bird Screen to the air pipe terminal For details of correct dimensioning contact the manufacturer concerned 5 2 Installing the wall exit for air supply pipe To prevent possible recirculation of exhaust gas the exhaust system installer must take account of effects such as the prevailing wind conditions any eddy zones the specifics ofthe site etc in the design of the flue 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 12 and Fig 16 should be seen as the absolute minimum and may in some circumstances not be adequate for specific installations Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice Fig 11 Design of air supply or exhaust pipe exit Outer wall retaining plate Sealant T piece or 4 90 elbow 90 elbow down turned Inner wall centering and retaining plate Tee termination optional An Note For exhaust applications the distance for clearance to combustible must be main
50. required gas pipe diameter refer to Tables on the following page Make absolutely sure that the pipe fittings have the correct thread size Make sure that a sediment trap is fitted at the inlet for the gas supply pipe to the boiler Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice Fit and seal the gas isolating valve supplied to the boiler s gas connection The gas pipes must be fastened outside the boiler and supported per code and standard plumbing practice Observe the local regulations or else the requirements the National Fuel Gas Code ANSI Z 223 1 or CAN CSA B149 1 in Canada when connecting the gas supply Where required by local regulations the installation must comply with the American Code for Controls and Safety Devices for Automatically Fired Boilers ASME CSD 1 Accessories to comply with ASME CSD 1 are available 7 747 010 720 22 185 Fig 20 Gas valve pipe connection 1 Gas supply 2 Manual shut off valve supplied 3 Sediment trap 4 Gas connection with isolating valve Buderus Length Gas pipe delivery rate in cubic feet of of pipe gas hour in feet T 1 Du Do 10 520 1060 1600 3050 4800 20 350 730 1100 2100 3300 30 285 590 890 1650 2700 40 245 500 760 1450 2300 50 215 440 670 1270 2000 75 175 360 545 1020 1650 100 160 305
51. rior notice 12 2 4 Wiring diagram for single boiler with AM10 DHW and system circulator GB312 MC10 BC10 Dark Green Um IIIS PTT Dark Green Purple White ps ne eee tts Not used Factory installed with AM10 Not used with AM10 Power to jumper i SAFe PZB Boiler Circulator Loading e Pump Low water cut off dry contacts l 10 Outdoor Reset Module E E Sra elay rmm en System Circulator L4006A Outdoor sensor See page 45 for piping diagram Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice 12 2 5 Single boiler with AM10 DHW and multiple heat zones 53235 1 BOL auoz aunjyesodway Buderus See page 48 for wiring diagram Technical specifications are subject to change without prior notice Logano plus GB312 applications manual 12 2009 12 2 6 Wiring diagram for single boiler with AM10 DHW and multiple heat zones installed jumper Zone Circulator Zone Circulator GB312 MC10 BC10 Dark Green IIS Dark Green Purple Gray White gt Not used with AM10 i Power to SAFe PS DHW Loading cut off dry contacts PZB Boiler
52. rol One parameter increment correlates to an increase of approx 0 6 burner input load BC10 parameter settings for adjustment of fan speed 0 2000 2001 4500 4501 70008 7001 9500 9501 12000ft 0 610m 611 1372m 1373 2134m 2135 2896m 2897 3666m Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice 12 Installation examples 12 1 Legend Legend Valves a Shut Off Valve 7 Flow Check Valve wy Two Way Valve Pressure Bypass Valve x Drain Valve Pressure Relief Valve faye Three Way Valve Low Loss Header Miscellaneous 2 Air Separator o Sensor Circulator Temperature Gauge Drain Temperature Gauge Shut Off Valve Outdoor Sensor Z Expansion Tank Expansion Tank o 4 4 Line Types Low Temperature Return High Temperature Return Supply Mixed Temperature Supply Domestic Hot Water Supply DHW Domestic Hot Water Recriculation DHWR City Well Water Supply Control Inputs Control Outputs Control Communication Local EMS Control Outputs Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice 12 2 Single boiler systems 12 2 1 Single boiler with AM10 DHW priority and system circulator Isolation
53. rus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice 4 Openings for combustion air supply and venting To ensure an adequate combustion air supply and venting of the heating system suitable measures must be taken in accordance with the National Fuel Gas Code NFPA 54 ANSI Z223 1 Section 5 3 Air for Combustion and Ventila tion or the local building code In Canada the regulations in accordance with CAN CSA B 149 1 and 2 Installation Codes apply Caution Risk of boiler damage and mal N functions due to missing or inadequate open ings for combustion air and venting of the boiler room The openings for combustion air supply and venting are always required regardless of whether the combustion air is drawn from the room conventional flue or supplied directly to the boiler through ducts balanced flue Inadequate venting of the boiler room may result in excessive ambient tem peratures This can damage the boiler Inadequate combustion air supply may cause malfunctions in operation e Make sure that air inlet or outlet vents are not closed off or their size reduced and that they are adequately dimensioned The boiler must not be operated until the obstruction has been removed Draw the operator s attention to any defi ciencies and the potential dangers Caution Risk of boiler damage from con N taminated combustion air Neveruse cleaning a
54. tained Refer to NFPA54 ANSI 2223 1 for details 5 3 Installing the roof exit for air pipe To prevent possible recirculation of flue gas the flue system installer must take account of effects such as the prevailing wind conditions any eddy zones the specifics of the site etc in the design of the flue 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 specific installations 7 747 010 720 16 Fig 12 Design of air pipe roof exit 1 T piece or 2 90 elbow 3 Flue outlet B Minimum horizontal distance from air intake of another appliance 10 ft minimum distance from own air intake for directly vented appliances 4 ft Buderus H Contact vent pipe manufacturer for installation guidelines to support vertical lengths of pipe Technical specifications are subject to change without prior notice Logano plus GB312 applications manual 12 2009 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 1 Flue outlet type of outlet depends on chosen manufac turer e g 90 elbow or T piece See Fig 9
55. that it is observed Boiler size output no of heat exchanger sec tions Model 90 4 120 4 160 5 200 6 240 7 280 8 Natural gas I B R Input max load Btu hr 328 300 440 500 588 300 732 600 880 700 1 028 800 min load Btu hr 132 150 132 000 176 000 220 000 264 000 309 000 gross output 180 80 F max load Btu hr 305 000 409 000 544 000 676 000 810 000 944 000 I B R net rating 180 80 F max load Btu hr 265 000 356 000 473 000 588 000 704 000 821 000 Rated heat input 122 86 F max load Btu hr 307 090 409 460 545 940 682 430 818 910 955 400 50 30 C min load Btu hr 128 050 127 390 171 190 212 310 255 220 298 140 Flue gas mass flow rate 180 80 F max load Ib min 4 85 6 53 9 14 11 40 13 88 16 15 Flue gas mass flow rate 122 86 F max load Ib min 5 05 7 12 9 29 11 61 14 02 16 65 Flue gas temperature 180 80 F max load 2 83 90 127 138 140 134 Flue gas temperature 122 86 F max load 120 133 129 131 131 135 CO2 content natural gas max load PF min load Available flue pressure in W C 0 4 100 Pa flue draft air supply pressure Air supply volumetric flow rate cfm 95 95 130 160 190 220 Blower G1G 170 Honeywell gas valve V4730C1071 V4730C1097 mue Gas injector diameter Natural gas calorific value 1075 BTU ft3 mm 17 0 Boiler water capacity i 42 42 5 3 6 3 74 79 Primary pressure drop psi 2 Fig 4 grap
56. the resulting total volume of water in the heating sys tem Use the following formula to calculate the maximum quantity of fill water that may be introduced without treatment Vmax ft 0 0243 x Qout Btu h ppm Formula for calculating the maximum quantity of untreated water that may be introduced Vmax maximum volume of untreated first fill and replenishment water in ft that may be introduced into the system over the entire service life of the boiler 1ft 7 48 gallon Total boiler output in Btu h see 1 Calcium carbonate concentration hardness in ppm 1mg l Information about the calcium carbonate CaCO3 hard ness concentration of the municipal water can be obtained from your local water company Example calculation Calculation of the maximum permitted quantity of first fill and replenishment water Vmax for a heating system with a total boiler output of 955 400 Btu h boiler size 280 8 Water hardness analysis figures quoted in ppm CaCO3 QoOut 955 400 Btu h Hardness CaC03 280 ppm Maximum permissible water volume Vmax 955 400 Btu h 3 Vmax 0 0243 x 83 ft 280 ppm Boiler size Boiler output Btu h 122 86 F 90 4 307 090 120 4 409 460 160 5 545 940 200 6 682 430 240 7 818 910 280 8 955 400 Tab 5 Boiler output 3 5 pH requirements The optimal range of pH for the boi
57. tion current Carbon dioxide content CO2 or oxygen content Carbon monoxide content Cancel the flue gas test and press the button again 11 4 Settings for speed of burner fan The fan speed curve of the burner has to be adjusted by using the programming mode of the BC10 control and the parameter settings from Table 23 of this instruction Setting of fan speed parameter in programming mode 7 Press the Chimney sweep and Status display buttons at the same time for 5 seconds to enter programming mode Press the Status display button 4 times to go to the maximum fan speed parameter BC10 display will show 2 0 Press the Reset button to reduce the value of the parameter Press the Chimney sweep button to increase the value of the parameter Programming mode is terminated if no button is pressed for 5 minutes Buderus Fig 28 Recording the measured values 1 Recommended location for testing point on flue pipe Technical specifications are subject to change without prior notice Logano plus GB312 applications manual 12 2009 This parameter can be used to correct input load of the burner It can be used for adjusting the fan speed for high altitude operation see Table 22 below 10 parameter range for fan adjustment of GB312 boilers Table 22 Oto 9 setttings lower than 0 will be ignored by the cont
58. turn Fit and seal the heating system return pipe to the threaded flange supplied Insert the seal in the flange joint and tighten the bolts evenly 2 RK NPT V Tue 1 4 3 7 747 010 720 81 1RS Fig 18 Fitting the return pipe Boiler return Return pipe external with NPT male thread Threaded flange 27 NPT female Gasket K Boiler return D AUN 6 3 Installing the DHW Tank A DHW Tank shall be piped as a separate zone of heat See piping and wiring schematics 6 4 Installing the condensate drain Notes on condensate drainage 5 The condensate that forms in the boiler and possible in the flue pipe must be prop erly drained away from the boiler The condensate which forms in the flue pipe can be drained via the boiler install flue pipe with downward slope towards the boiler Make sure that drainage of the conden sate into the public sewer system con forms with the applicable national regulations Also observe any applicable local regula tions Technical specifications are subject to change without prior notice Logano plus GB312 applications manual 12 2009 Remove the trap Unscrew the cap and fill the trap with approx 0 3 gallons of water Note For high temperature applications add 1 cup of mineral oil to the trap Danger Risk of fatal injury from poisoning N If the trap is not filled with water or other con nections
59. um TEL inch maximum TEL in at Boiler in feet feet GB312 90 328 4 5 100 4 40ft 3 GB312 120 440 4 B 100 5 75ft 4 GB312 160 588 B 100 5 NA 4 NA GB312 200 733 4 8 100 7 100ft 6 45ft GB312 240 881 4 8 100 7 100ft 6 NA GB312 280 1029 8 100 7 1008 6 Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice 5 5 3 Horizontal Vent and Horizontal Combustion Air Inlet Natural Gas See Figure 14 Operating Conditions Total flue amp combustion air supply system pressure 0 40 WC Vent calculated on 0 2 WC Combustion air calculated on 0 2 WC Min Gross Stack Temp 150 F CO2 percentage NG 9 GB312 Venting System Table Venting Parameters Exhaust horizontal termination tee Exhaust vertical rain cap Sealed Comb Intake all models PVC piping with 90 downward elbow 90 elbow 71 equivalent length 45 elbow 4ft equivalent length Rain cap termination 10ft equivalent length 1 lineal foot of pipe 1ft equivalent length Vent Exhaust Outlet Horizontal Table 12 Note Breeching pressure measured at outlet of boiler vent connection Buderus Models Input MBH Vent Venting Total Equivalent Vent Diameter for minus Vent Diameter for minus Connecti
60. ved for use in Canada CPVC flue system for Canada Table 8 Manufacturer Flue System IPEX System 636 CPVC This system is only available up to 4 size amp only applies to GB312 90 for 55ft TEL or the GB312 120 for 30ft TEL Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice Flue air supply system installation must comply with Part 10 Venting of Equipment of the National Fuel Gas Code 54 ANSI 2223 1 or CAS B 149 or other applicable local building code regulations The flue and air supply system for design of air supply connection O Section 5 5 must be designed for a max pressure of 0 40 inches W C 100 Pa for the overall system exhaust and air supply system Observe the following points when installing the flue ducting The cross sectional area of the flue pipe must be calculated according to the applicable regulations Select the shortest possible route for the exhaust pipe Install flue pipes with an upward slope from the boiler per foot minimum We recommend the fitting of a protective grille bird screen to the flue pipe terminal For details of correct dimensioning contact the venting manufacturer concerned providing a complete sizing dimensions of the venting system H All instructions relating to all parts of the flue system and especially the instructions ofth
61. ws L e Press the 2 button to reduce the boiler output to a percentage f maximum until the display shows L3 Read off output RC35 Wait until the output drops to 30 e Adjust the level to 9 1 using the low output adjusting screw Fig 25 item 1 Do not exceed CO limit given in Table 21 Turning the screw clockwise increases the level Turning the screw counter clockwise reduces the level he ad gt A ESTA Y gt X 2 Auc oN p ho A Nf EU N Fig 25 Setting the at maximum output 1 High output adjusting screw 9 Q 1 E P 4 Fig 27 Setting the at minimum output 1 Low output adjusting screw gas valve Honeywell V4730C 2 Cap screw Buderus Logano plus GB312 applications manual 12 2009 Technical specifications are subject to change without prior notice 11 3 5 Check and monitoring CO level at maximum output Press the button to increase the boiler output to a higher percentage Read off output on RC35 Wait until output reaches at least 7096 Check content again 11 3 6 Recording measured values e Take the following readings at a testing point on the flue pipe and record them in the commissioning log Installation and Maintenance Manual Section 7 20 page 54 Flue pressure Flue gas temperature tA flame ioniza
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