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GB125 Concentric Vent

Design Manual

GB125 Concentric Vent Design Manual | 05 .2009

Technical specifications are subject to change without prior notice

Included items in the GAK basic kit:

Table 7

Description

Qty

Concentric boiler adapter

Concentric inspection Tee-joint

Concentric pipe, DN125/80 39” (1000 mm)

Concentric chimney penetration DN125/80 and

chimney face plate, DN125

Load bearing elbow, DN 80, with bracing and

support rail

2-Piece chimney spacer (set of 6)

Termination, black , DN80, L = 20” (500 mm) and

flue gas end pipe, black

CENTROCERIN® gasket lubricant (not shown)

Accessories for GAK System:

Table 8

Part Number

Description

87094556

Concentric Pipe DN80/125x500 19“ (050mm)

87094560

Concentric Pipe DN80/125x1000 39“ (1000 mm)

87094600

Concentric Pipe DN80/125x2000 78“ (2000 mm)

87094580

Concentric Elbow DN80/125x15 15 degrees

87094576

Concentric Elbow DN80/125x30 30 degrees

87094570

Concentric Elbow DN80/125x45 45 degrees

87094574

Concentric Elbow DN80/125x87 90 degrees

Rigid Pipe for inside the chimney:

Table 9

Part Number

Description

87092078

Single Pipe DN80x250 9.5“ (250mm)

87094588

Single Pipe DN80x500 19” (500mm)

87094592

Single Pipe DN80x1000 39“ (1000mm)

87094596

Single Pipe DN80x2000 78“ (2000mm)

87094652

Single Pipe Elbow DN80x15 15 degrees

87094648

Single Pipe Elbow DN80x30 30 degrees

87094644

Single Pipe Elbow DN80x45 45 degrees

87094614

2-Piece chimney spacer

87094920

Stainless Steel Chimney Cover (for rigid pipe only)

Inside a chimney with inaccessible offset:

Table 10

Part Number

Description

87094036

UB-Flex kit DN83x12500 Flexible flue gas pipe

40ft. (12.5m) Spacers (8)

87092180

Chimney Top End Pipe (not needed with stainless

steel chimney cover)

87094668

Union for two UB Flex pipes (for tall chimneys

>40ft. or repairs)

87094672

Union from GAK rigid vent pipe to UB Flex pipe

87094614

2-Piece chimney spacer

87094676

Inspection and cleanout Tee for UB Flex

(for installation inside the chimney)

7747208685

Stainless Steel Chimney Cover (for UB Flex only)

Summary of Contents for GB125BE-22

Page 1: ...For Buderus models GB125BE 22 30 35 Design Manual GB125 Concentric Vent ...

Page 2: ...2 GB125 Concentric Vent Design Manual GB125 Concentric Vent Design Manual 05 2009 Technical specifications are subject to change without prior notice ...

Page 3: ...ation requirments for the boiler room 8 4 2 Condensate drain 8 4 3 Annual inspection 8 4 4 Safety distances to combustible material 8 4 5 Terminations 8 4 6 Instructions for inspection and clean out sections 8 5 Installing the flue gas system 9 5 1 General installation notes 9 5 2 Trimming pipes 9 5 3 Installing the pipes 9 5 4 Pipe disassembly 10 5 5 Appliance connection 10 5 6 Installation and f...

Page 4: ...4 GB125 Concentric Vent Design Manual GB125 Concentric Vent Design Manual 05 2009 Technical specifications are subject to change without prior notice ...

Page 5: ...or specialists who through their training and experience are knowledgeable in the installation and servicing of heating systems and oil installations This document is a supplement to the boiler manuals and the instructions included with the venting system 1 2 Standards regulations and directives It is the responsibility of the installer to ensure that the system corresponds to all current building...

Page 6: ...AS AND CARBON MONOXIDE POISONING Insufficient ventilation or leaky flue gas pipes may cause dangerous flue gas leaks Ensure that air intake or exhaust air vents are not closed off or their size reduced The boiler must not be operated until the obstruction has been removed Inform the system user in writing of the fault and its associated dangers WARNING RISK OF DEATH FROM FALLING Take sufficient me...

Page 7: ...ssential components needed in every installation Refer to the descriptions of the individual system for included items For most systems extra straight pipe and additional elbows must be purchased as needed See list of accessories for every system The GAK system draws combustion air from the roof and may not be suitable for installation in multi flue chimneys where a second flue vents a combustion ...

Page 8: ...concentric venting system allows installation with zero 0 0 mm clearance to combustibles Therefore no particular protective measures or safety distances are required to combustible material or furniture 4 5 Terminations Terminations must be so positioned as to avoid products of combustion entering openings into buildings or other flues or vents The Buderus concentric vent is designed for indoor in...

Page 9: ...om cut edges otherwise gaskets will get damaged which can result in the system no longer being air tight and condensate to leak Reinstall the flue gas and air intake pipes 5 3 Installing the pipes Pipes are assembled so that the sleeve points in the direction of the flue gas stream with the gasket on the far side of the pipe when viewed from the boiler Only use original Buderus flue gas pipe gaske...

Page 10: ...vided hose clamp 5 6 Installation and final assembly 1 Install the termination 2 Follow the installation instructions to waterproof the penetration Follow standard industry practice and consult a specialist if needed 3 On the boiler install a clean out section immediately after the boiler adapter if applicable 4 Connect the termination with the boiler using straight concentric pieces and concentri...

Page 11: ...aks occur during operation the venting system must be checked for leaks before startup The flue gas line is sufficiently tight if the combustion air intake at the boiler adapter measures no higher than 0 2 CO or a minimum of 20 6 O ring gap test WARNING RISK OF FLUE GAS POISONING Leaky flue gas lines may cause dangerous flue gas leaks Take the boiler out of operation until the leak in the flue gas...

Page 12: ...e of a steam plume in cold climates Ice can develop on the termination in cold climates Ensure that ice formation does not pose a hazard on public walkways Each boiler must be vented with a separate system In the Commonwealth of Massachusetts a direct vent boiler is required to be accompanied by CO detectors per 527 CMR 31 00 Included items in basic kit Before starting any installation work ensure...

Page 13: ... Additional straight pipe sections an inspection and clean out piece a suitable roof jack or collar Fig 7 8 as well as at least one elbow must be purchased separately Included items in basic kit Before starting any installation work ensure that all included items Table 5 are present plus any additional pieces Table 6 needed to complete the job Table 5 Part Description Qty 1 7747016312 Concentric b...

Page 14: ... H x DIA 3 1 2 x19 1 2 90x500mm for DO system 87094904 Roof collar flat roof H x DIA 9 1 2 x19 1 2 240x500mm for DO system 87094812 Roof jack 5 25 12 1 to 12 6 pitch for DO system 87094814 Roof jack 35 55 12 8 to 12 18 pitch for DO system 87094587 Concentric inspection Tee 87094556 Concentric Pipe DN80 125x500 19 500mm 87094560 Concentric Pipe DN80 125x1000 39 1000mm 87094600 Concentric Pipe DN80 ...

Page 15: ...rawn in with GB125 combustion air and cause service calls For installations in multi flue chimneys with a risk of ambers from wood stoves or similar appliances reaching the top of the chimney optional stainless steel terminations are available See list of accessories Tables 8 10 Minimum chimney chase dimensions to ensure sufficient supply of combustion air Rectangular 5 x 5 120 mm 120 mm Round DIA...

Page 16: ... degrees 87094570 Concentric Elbow DN80 125x45 45 degrees 87094574 Concentric Elbow DN80 125x87 90 degrees Rigid Pipe for inside the chimney Table 9 Part Number Description 87092078 Single Pipe DN80x250 9 5 250mm 87094588 Single Pipe DN80x500 19 500mm 87094592 Single Pipe DN80x1000 39 1000mm 87094596 Single Pipe DN80x2000 78 2000mm 87094652 Single Pipe Elbow DN80x15 15 degrees 87094648 Single Pipe...

Page 17: ...ws If it is inaccessible use the UB Flex liner instead of rigid pipe Determine the position of the chimney penetration in the boiler room Position the hole into the chimney such that the vent pipe to the boiler adapter runs at a 5 8 pitch per foot 55mm per meter to allow condensate to drain into the boiler reliably The size of the opening must be sufficient to install the support rail as shown in ...

Page 18: ...alves of the spacer Fig 11 around the pipe and join them together The chimney must be thoroughly cleaned before installing the flue gas system It is recommended to use a professional chimney sweep Tools needed on the roof Vent pipes with spacers attached Black or stainless steel top end pipe Chimney Cover CENTROCERIN Hammer drill with masonry bit 1 4 6mm 4 wall anchors and screws Matching screwdri...

Page 19: ...that the terminating black pipe extends at least 13 330mm above the top of the chimney where the cover will be attached This will result in a minimum of 3 75mm clearance of the pipe above the cap Remove the top of the chimney cover Fig 13 Item 1 by pulling it up Ensure it is held by its leash Push the cover over the terminating black pipe and verify that it fits the top of the chimney The base can...

Page 20: ...ort elbow with CENTROCERIN and assemble using a slight turning motion Allow a 5 8 pitch per foot 55mm per meter toward the boiler Mortar the penetrating pipe in place Slide on the face plate Fig 15 Item 1 and once the mortar has cured mark and drill mounting holes insert wall anchors and screw on the face plate Connection to the boiler Connect the inspection and clean out pipe to the boiler adapte...

Page 21: ... 5 1 2 Ø 130 mm A stainless steel chimney termination is available for installations with multi flue chimneys and a risk of ambers from wood stoves or similar appliances reaching the top of the chimney The flexible liner may only be installed vertically with a minimum pitch of 15 and never instead of an elbow or a horizontal section You will need to purchase the GAK basic kit Fig 9 the UB Flex kit...

Page 22: ...h masonry bit 5 8 6mm 4 wall anchors and screws Matching screwdriver Tape measure Carpet knife or similar Wrench or similar weight WARNING RISK OF DEATH FROM FALLING Take sufficient measures to prevent accidents on the roof Use state of the art safety equipment and take common sense safety measures WARNING RISK OF INJURY OR DEATH FROM TOOLS AND EQUIPMENT FALLING FROM THE ROOF Secure tools and equi...

Page 23: ...er and hold the pipe with one hand Put the cover down onto the chimney crown and pull the pipe up until tight Slide the split ring threads facing up over the flexible pipe and let it snap into a groove in the cover Turn the pipe until the nose in the split ring meets the notch in the cover Caulk around the perimeter of the cover to prevent rain water from entering the chimney and screw down firmly...

Page 24: ...last white pipe length so that the terminating stainless steel pipe extends at least 11 280mm above the top of the chimney crown where the cover will be sitting This will result in a minimum of 3 75mm clearance of the pipe above the cap The end pipe can always be trimmed later Coat the gasket of the last white pipe and the mating stainless steel pipe with CENTROCERIN and assemble using a slight tu...

Page 25: ...se clamp until the union is held firmly in place Set the complete chimney cover with the UB Flex pipe attached onto the chimney When looking down into the chimney you should see a fairly straight pipe If major twists and turns occur loosen the hose clamp and pull up on the union If the pipe still has a lot of slack disassemble the union and shorten the UB Flex pipe carefully Reassemble and verify ...

Page 26: ...nd it is necessary to cut off any smooth section Make cuts perfectly perpendicular to the pipe Disassemble the union and observe the arrows on the main body dictating the direction of the flue gas flow Slide the threaded ring with the threads facing to the loose end over the UB flex pipe Slide the split ring over the corrugated UB flex pipe with the flange facing the lose end and snap into its sec...

Page 27: ...pipe Only the perforated section of the UB Flex pipe can be connected and it is necessary to cut off any smooth section Make cuts perfectly perpendicular to the pipe Disassemble the union and observe the arrow on the main body dictating the direction of the flue gases The gray gasket must face up Slide the threaded ring with the threads facing up over the UB flex pipe Slide the split ring over the...

Page 28: ...ction and cleanout Tee to be installed in the vent pipe inside the chimney The Tee is installed in similar fashion to the Union for UB Flex Pipes described above Table 16 Part Number Description 87094676 Inspection and cleanout Tee for UB Flex It comes with a screw cap on the side that allows access for inspection and cleaning It is installed at the bottom of the chimney just above the supporting ...

Page 29: ...Applications manual 29 GB125 Concentric Vent Design Manual GB125 Concentric Vent Design Manual 05 2009 Technical specifications are subject to change without prior notice Notes ...

Page 30: ...30 GB125 Concentric Vent Design Manual GB125 Concentric Vent Design Manual 05 2009 Technical specifications are subject to change without prior notice ...

Page 31: ...Applications manual 31 GB125 Concentric Vent Design Manual GB125 Concentric Vent Design Manual 05 2009 Technical specifications are subject to change without prior notice ...

Page 32: ...053 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 ...

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