Buderus GB312/200 Bedienungsanleitung

GB312/200 Gas Condensing Boiler

Engineering

Submittal

Sheet

GB312/200 Performance Data

Gas Input (MBH) 732.6

Gross IBR Output (MBH) 676

Input at Minimum Capacity (MBH) 220

Output at Minimum Capacity (MBH) 217

Net IBR Rating (MBH) 588

Thermal Efciency 92.3%

Combustion Efciency 92.5%

Boiler Horse Power 20.2

GB312/200 Operational Data

Number of Heat Exchanger Sections 6

Dry Weight (lbs.) 585

Approx. Water Content (gal.) 6.3

Min Inlet Gas Pressure NG ("WC) 3.5

Max Inlet Gas Pressure NG ("WC) 10.5

Max High Limit Temperature (°F) 200°F

Fireside Pressure Drop (Inch WC) 0.97

Flow Rate at 18°F ∆T (GPM) 75

Flow Rate at 36°F ∆T (GPM) 37

Max Working Pressure (psi) 50

Relief Valve Rating (MBH) 1,418

Relief Valve Pressure Rating (psi) 50

Max Flow Temp Heating/DHW (°F) 172/180

Max equivalent exhaust vent length (ft) 100

Max equivalent combustion air vent length (ft) 100

Venting Category IV

Approved Venting Materials CPVC¹ ²,

AL29-4C

¹The following system is approved for use in U.S.A and may be

used with this boiler:

Spears - CVPC pipe to Schedule 80 ASTM D1784

² The following system is approved for use in Canada and may

be used with this boiler:

IPEX - System 636 CPVC (available in 4" only)

GB312/200 Electrical Speciﬁcations

Electrical Voltage Mains 120V/60Hz

Electrical Voltage Controls 24V

Power Consumption Max Load (A) 1.91

Power Consumption Min Load (A) 0.41

Max Permissible Fuse Rating (A) 10

GB312/200 Clearances

Minimum Clearance

to Combustibles

(Inch)

Wall Clearance

Recommended (Inch)

Front 20 28

Rear 22 28

Side 20 28

Flue pipe to wall 6 14

Additional Information

• Outdoor reset AM10 standard with outdoor sensor

• DHW priority MC10/BC10 standard (DHW sensor not

included)

• Modulating premix burner

• Direct-vent sealed combustion

• Direct ignition by hot surface igniter

• Adjustable leveling legs

• 50 psi relief valve

Options

• CSD-1 kit (high gas pressure switch / low gas pressure

switch)

• Condensate neutralization tank (NE–0.1)

• Logamatic 4323 Control

- Sequencing up to 8 boilers

- System and zoning control for pumps and valves

- solar integration

- plate and frame heat exchanger control

• CM10 two boiler module

• EM10 BMS integration 0-10V input stand alone control

• Low water cutoff

• High temperature manual reset

• DHW sensor

Note: Refer to applications manual for speciﬁc information on venting,

piping, electrical connections and pump sizing.

|GB312/200 Gas Condensing Boiler | Engineering Submittal Sheet

Data subject to change without notice | GB312/200-SS-RevA 03/2008 Buderus

Bosch Thermotechnology Corp.

50 Wentworth Ave

Londonderry, NH 03053

Tel: (603) 882-1100

Fax: (603) 584-1681

www.buderus.net

GB312/200 Piping Connections/Speciﬁcations

ØAA Flue Connection Diameter 8"

AL Combustion Air Pipe Diameter 4"

AG GAS Connection Size 1¼" NPT

RK/VK Boiler Return & Supply Connections 2½" NPT

ST Relief Valve Connection (B-kit) ¾" NPT

GB312 B-Kit Assembly with Flow Check Valve

ITEM DESCRIPTION QTY

1 2½" Flange to boiler 2

2 ½" Female NPT 1

3 ¾" Female NPT 3

4 ¾" Female NPT 1

5 1" Female NPT 1

6 2½" - Check Valve 1

7 2½" - Female NPT Mating Flange to system 1

GB312 B-Kit Assembly with Flow Check Valve

8⅛"

1'− 6"

1'− 2½"

6½"

4⅛"

5⅛"

7½"

Far

Side

Far

Side

1 1

View A–A

GB312/200 Top View

8½''

17¼''

47⅜''

VK -Boiler Supply

ST -Safety Valve Connection RK -Boiler Return

AG -Gas Connection

10⅝''

TM -Pressure/Temperature Gauge

RKAG

8¾''

4''

24¼''

40⅛''

45''

59¾''

55⅛''

19½''

VK -Boiler Flow AL -Combustion Air Pipe

ØAA -Flue Connection RK -Boiler Return

AKO -Condensate Drain Knock Out

AG -Gas Connection

8¾''

4''

⅛

45''

¾'

⅛

VK -Boiler Flow AL -Combustion Air Pi

AA -Flue Connection RK -Boiler Retur

KO -Condensate Drain Knock Ou

onnection

GB312/200 Rear View

39¾'' ½- 1''

28¼''

19½''

1¼''

51¼''

28¼''

19½''

19½

19½'

¼''

GB312/200 Side View

TM -Pressure/Temperature Gauge

A-A -B-Kit Assembly with Flow Check Valve

18''

A-A

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