Buderus Logano plus GB312 Instructions d'utilisation

CAUTION!

Observe the safety instructions of this installation and

maintenance manual before placing the boiler in oper-

ation.

DANGER!

If installation, adjustment, modication, operation or

maintenance of the heating system is carried out by

an unqualied 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 qualied 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 tter.



 



Logano plus GB312

_GB312 Applications Manual

 



 

GB312 Applications Manual _

Table of Contents

1 Product description 4

1.1 Package contents 6

1.2 Dimensions and speciﬁcations 7

2 Installing the boiler 10

2.1 Recommended wall clearances 10

2.2 Leveling the boiler 11

3 Water quality requirements 12

3.1 Maintenance of user manual 12

3.2 Prevention of damage by corrosion 12

3.3 Water hardness 13

3.4 Checking max quantity of ﬁrst ﬁll water based

on water quality 13

3.5 pH requirements 13

3.6 Operator’s log 15

4 Openings for combustion air supply

& venting 16

5 Venting requirements 17

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

5.4 Design of ﬂue and air pipe for balanced ﬂue operation

(refer to NFPA54 ANSIZ223.1 for dimensions) 21

5.5 Venting system calculation/sizing chart 22

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 29

7 CSD-1 Kit 31

7.1 Operating Addendum for the GB312 in High

Temperature Applications 33

8 Internal boiler wiring diagram 34

9 MC10 wiring diagram 35

10 Sequence of operations 36

11 High altitude adjustment 37

11.1 General 37

11.2 Adjustments 37

11.3 CO²adjustment of the burner / adjustment

of the gas valve 37

11.4 Setting for speed of burner fan 40

12 Examples of installations 42

12.1 Legend 42

12.2 Single boiler systems 43

12.3 Multiple boiler systems 49

13 Pump and low loss header selection 57

13.1 Pump & low loss header (hydro-separator) selection 57

13.2 Low loss header selection per manufacturer 58

_GB312 Applications Manual

 



1 Product description

 



Fig. 1 Logano plus GB312 - main components

1Programmer (MC10 and BC10)

2Gas burner

3Boiler front panel

4Trap

5Boiler heat exchanger with insulation

6Burner control unit

7Gas valve

8Boiler outer casing

9B-kit with ow check valve (supplied as standard, not fac-

tory installed)

10 Gas isolating valve (supplied as standard, not factory

installed)

11 Mating ange, 2½" (included in B-kit, not factory installed)

7 747 010 720-01.2RS



  























 



GB312 Applications Manual _

Fig. 2 Logamatic BC10 basic programmer - controls

1On/o switch

2Dial for DHW set point

3“DHW heating” LED

4Status display screen

5Control knob for maximum boiler temperature

6“Heat demand” LED

7Base plate with slot for a programming unit e.g. RC35

(behind the cover panel)

8“Burner” LED (ON/OFF)

9Socket for connecting diagnostic plug

10 “Status display” button

11 “Flue gas test” button

12 “Reset” button

2 3 4 5 6

789101112 7 747 010 720-85.1RS

(available : Fall 2008)

   





 













 











_GB312 Applications Manual

 



1.1 Package contents













Component Packaging

Boiler (fully assembled with outer

casing, Logamatic MC10 program-

ming unit, BC10 and gas isolating

valve)

1 box on a pallet

Technical documentation 1 foil package

Set of adjustable feet 1 foil package

B-kit (temperature/pressure gauge,

pressure relief valve, supply connector,

ow/return mating ange, check

valve)

1 box

GB312 Applications Manual _

1.2 Dimensions and speciﬁcations

1.2.1 Logano plus GB312 dimensions

Fig. 3 Connections and dimensions for Logano plus GB312 (sizes in inches)

AA = Flue connection

AL = Combustion air pipe connection (balanced ue opera-

tion only)

VK = Boiler supply

AKO = Condensate outlet

GAS = Gas connection + main isolating valve

ST = Pressure relief valve connection

RK = Boiler return

TM = Pressure/temperature gauge

7 747 010 720-02.3RS

59¾''

55⅛''

⅝- 1''

8½'

28¼''

19½''

1⅜"

8.7'' 4 ''

24¼''

40⅛''

45''

8½''

Boiler size (output - no. of heat exchanger

sections) Model 90 - 4 120 - 4 160 - 5 200 - 6 240 - 7 280 - 8

Width B Inches 39⅛47⅜55½

Dimension XAA Inches 13⅛15⅛17¼ 19¼ 21⅜

Dimension XRK (= XAL = XGAS) Inches 10⅝14¾ 10⅝ 14¾ 10⅝

Dimension F Inches 31½ 39¾ 48

Dimension A Inches 1½51½5

AA = Flue pipe diameter Inches 6⅜8

Flue adaptor for desired manufacturer's ue

system

"8x"8"6x"5x"⅜6

Dimension YAA Inches 9½18½1

Dimension ZAA Inches ¼21¾5

AL = Diameter of combustion air pipe (bal-

anced ue only)

Inches 4

Connections VK and RK 2½" NPT

Tab. 1 Dimensions and connection sizes

(Use rubber plumbing adapter to connect)

"⅜6

_GB312 Applications Manual

 



Connection ST (B-kit) TPN"1TPN"¾

Diameter GAS TPN"¼1TPN"1

Boiler size (output - no. of heat exchanger

sections) Model 90 - 4 120 - 4 160 - 5 200 - 6 240 - 7 280 - 8

Tab. 1 Dimensions and connection sizes

1.2.2 Speciﬁcations

Observe all standards and guidelines appli-

cable to the installation and operation of the

heating system in your country. The informa-

tion on the boiler rating plate is denitive and

it is imperative 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

I-B-R 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 ow rate 180/80 ° F max. load lb/min 4.85 6.53 9.14 11.40 13.88 16.15

Flue gas mass ow rate 122/86 ° F max. load lb/min 5.05 7.12 9.29 11.61 14.02 16.65

Flue gas temperature 180/80 ° F max. load ° F 83 90 127 138 140 134

Flue gas temperature 122/86 ° F max. load ° F 120 133 129 131 131 135

CO2 content, natural gas max. load %9.1

min. load

Available ue pressure in. W.C. 0.4 (100 Pa)

(ue draft + air supply pressure)

Air supply volumetric ow rate cfm 95 95 130 160 190 220

Blower G1G 170

Honeywell gas valve V4730C1071 V4730C1097 V4730C10

Gas injector diameter

Natural gas caloric value 1075 BTU/ft3 17.0

Heating water circuit

Boiler water capacity US gal-

lons 4.2 4.2 5.3 6.3 7.1 7.9

Primary pressure drop psi Fig. 4 (graph)

Maximum ow temperature, heating/hot water

mode (at full output) ° F 180/180

High temperature cut-out safety limit (manual

reset high limit setting )° F 200

Permissible operating pressure psi 50

Electrical data

Enclosure class IP 40

Mains power supply V/Hz 120 V / 60 Hz

Power consumption max. load W 84 150 190 230 270 370

min. load W40 40 45 50 50 50

Maximum permissible fuse rating A10 (slow blow)

Appliance dimensions and weight

Transport clearance dimensions, width x depth x

height Inches 34x25x60 42x25x60 50x25x60

Weight lbs 455 530 585 665 730

Boiler size (output - no. of heat exchanger sec-

tions) Unit 90 - 4 120 - 4 160 - 5 200 - 6 240 - 7 280 - 8

Tab. 2 Specications

GB312 Applications Manual _

Fig. 4 Primary circuit ow resistance, GB312 with check valve

xFlow rate in gal/min (GPM)

yPrimary pressure drop in psi

The boiler is factory-set for: – Natural gas

0,1

100

0001001011

90-4

120-4

160-5

200-6

240-7

280-8

7 747 010 720-30.1RS

Gas ow rate

cu ft/hr

6.4234-09

120 - 4 434.4

0.9755-061

200 - 6 720.6

8.8687-042

280 - 8 1013.4

Tab. 3 Gas ow rate (based on gas temperature of 60 °F and air pressure of 30 in. Hg)

Boiler rating

Natural gas

Caloric value 1075 BTU/ft

434.4

720.6

1013.4

Note:

• 

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• 

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_GB312 Applications Manual

 



2 Installing the boiler

2.1 Recommended wall clearances





        

 

Fig. 5 Wall clearances in the boiler room

Dimension Wall clearance (inch)

minimum

Recom-

mended

A2028

B1)

1) This clearance dimension is dependent on the ue system tted

22 28

C2028

D20 28

E1) 614

Tab. 4 Recommended and minimum wall clearances

(dimensions in inches). It is imperative that the

minimum clearance (dimension E) is main-

tained.

Where applicable, allow extra wall clearances

for additional components such as DHW

tank, pipe connections or other ue

components, etc.

7 747 010 720-09.1RS

Notes: (multiple boiler installations)

A. 







B. 

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