Buderus Logano plus GB312 Bedienungsanleitung

Operating instructions

Gas-fired condensing boiler

Logano plus GB312

7 747 009 296 - 01/2007 EN

For the user

Please read carefully before

use

Contents

Gas-fired condensing boiler Logano plus GB312 - Technical specifications are subject to change without prior notice.2

1 For your safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.1 About this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.2 Correct use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.3 Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.4 Please observe these instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.4.1 If you smell gas. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.4.2 Instructions for the boiler room . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2 Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.1 Components on the Logano plus GB312 boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.2 Controls on the BC10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3 Operating the heating system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.1 Switching on the heating system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.1.1 Starting the heating system via the control panel and programming unit . . . . . . . . . . . . 7

3.2 Switching off the heating system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.3 Emergency measures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.4 Checking the operating pressure, topping up with heating water and bleeding the system . . . 8

3.4.1 When do you need to check the operating pressure? . . . . . . . . . . . . . . . . . . . . . . 8

3.4.2 Checking the operating pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.4.3 Topping up heating water and bleeding the system . . . . . . . . . . . . . . . . . . . . . . . 9

3.5 Why is regular maintenance important? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.1 Recognising and rectifying faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Operating pressure

Use this fuel only:

__________________________________

Design operating pressure

(optimum value): ______________ bar

Maximum heating system oper-

ating pressure:

(standard = 3 bar) ______________ bar

stamp/date/signature

For your safety 1

Gas-fired condensing boiler Logano plus SB735 - Technical specifications are subject to change without prior notice. 3

1 For your safety

1.1 About this manual

These instructions contain important information for the

safe and correct operation of the boiler.

In the following, the Logano plus GB312 will generally be

referred to as "the boiler".

1.2 Correct use

The boiler may only be used for heating water for the

purposes of central heating or domestic hot water

(DHW), in homes or apartment buildings.

1.3 Key to symbols

The following symbols are used in these instructions:

ÎCross-references

Cross-references to a specific point in the document or

to other documents are marked with an arrow Î.

1.4 Please observe these instructions

You will learn how to use your heating system by

–arranging for your local heating contractor to instruct

you after installing the system and

–carefully reading these operating instructions.

Carry out tasks on the boiler only as described in these

operating instructions.

1.4.1 If you smell gas

WARNING!

RISK TO LIFE

Indicates a possible danger which can lead

to serious injuries or even death if appropri-

ate care is not taken.

CAUTION!

RISK OF INJURY/

SYSTEM DAMAGE

Indicates a potentially dangerous situation

which could lead to minor or moderately

serious injuries or to damage to property.

USER NOTE

User tips for optimum utilisation and set-

ting of the equipment, plus other useful in-

formation.

WARNING!

RISK TO LIFE

if personnel are not qualified.

zMake sure that installation, initial start-

up and maintenance are carried out

only by professional heating techni-

cians. Appropriate qualifications are

particularly necessary for work on elec-

trical and fuel-carrying parts.

WARNING!

RISK TO LIFE

through the explosion of flammable gases.

If you can smell gas, there is a risk of ex-

plosion.

zNo open flames. No smoking. Do not

use lighters.

zPrevent sparks.

Do not activate any electrical switches,

including telephones, plugs or electrical

bells.

zClose the main gas shut-off valve.

zOpen windows and doors.

zWarn all occupants, but do not use

doorbells.

zLeave the building.

zCall your local gas supplier and heating

contractor from outside the building.

zIf necessary, notify police or fire servic-

es.

zIf you hear gas escaping, evacuate the

affected area immediately.

For your safety

Gas-fired condensing boiler Logano plus SB735 - Technical specifications are subject to change without prior notice.4

1.4.2 Instructions for the boiler room

WARNING!

RISK TO LIFE

from poisoning.

In open-flue operation, insufficient ventila-

tion can lead to dangerous flue gas leaks.

zNever close or obstruct air duct or vent

apertures, or reduce their size.

zKeep the doors of the boiler room

closed.

zPrevent small animals from entering the

boiler room and in particular the air sup-

ply apertures, e.g. by means of an air

grille.

zThe boiler must not be operated until

the problem has been remedied.

WARNING!

RISK OF FIRE

due to flammable materials or liquids.

zEnsure that there are no flammable ma-

terials or liquids in the immediate vicini-

ty of the boiler.

Product description 2

Logano plus GB312 gas-fired condensing boiler - Technical specifications are subject to change without prior notice. 5

2 Product description

2.1 Components on the Logano plus GB312 boiler

The boiler is a gas-fired condensing boiler with an alu-

minium heat exchanger.

The boiler consists of the following:

–Control panel

–Frame and casing

–Boiler block with lagging

–Gas burner

The control panel monitors and controls all electrical

components of the boiler.

The boiler block transfers the heat generated by the

burner to the heating water. The lagging reduces energy

loss.

Fig. 1 Logano plus GB312 boiler

1Control panel

2Gas burner

3Boiler front panel

4Siphon

5Boiler block with lagging

6Burner control unit

7Gas train

8Boiler casing

The design and operation of this product

conforms to European Directives and the

supplementary national requirements. Its

conformity is confirmed by the CE marking.

You can view the Declaration of Conformity

on the internet at www.buderus.de/konfo or

request a copy from your local Buderus of-

fice.

Product description

Logano plus GB312 gas-fired condensing boiler - Technical specifications are subject to change without prior notice.6

2.2 Controls on the BC10

USER NOTE

zFor more information on operation, see

the Îdocumentation for the BC10

base controller.

Fig. 2 Controls on the BC10 base controller

Pos. 1: ON/OFF switch

Pos. 2: Rotary selector for DHW temperature

Pos. 3: "DHW heating" LED

Pos. 4: Status display screen

Pos. 5: Rotary selector for maximum boiler temperature

during heating mode

Pos. 6: "Heat demand" LED

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

RC30 (behind the cover)

Pos. 8: "Burner" LED (on/off)

Pos. 9: Diagnostic plug

Pos. 10: "Status display" button

Pos. 11: "Chimney sweep" button for flue gas test and

manual mode

Pos. 12: "Reset" button

12 1011

3 6

Operating the heating system 3

Logano plus GB312 gas-fired condensing boiler - Technical specifications are subject to change without prior notice. 7

3 Operating the heating system

3.1 Switching on the heating system

Before switching on, ensure that:

–The operating pressure is high enough

–The fuel supply has been opened at the main shut-off

valve

–The heating system emergency stop switch is

switched on

3.1.1 Starting the heating system via the control

panel and programming unit

zSet both rotary selectors on the control panel to

"AUT" (automatic mode). The programming unit

takes control of the panel in this setting.

zSwitch on the ON/OFF switch (position "1"). The con-

trol panel checks the current status of the system,

and the burner may start up.

When the boiler detects heat demand, the start program

begins and the burner fires after about 30 seconds. Heat

demand arises when the central heating or DHW tem-

perature falls below the set value. The LED below the

corresponding rotary selector will light up.

zCheck the following settings on the programming unit

and adjust as required:

–Automatic operating mode

–Desired room temperature

–Desired DHW temperature

–Desired heating program

Fig. 3 Setting the control panel

Fig. 4 Switching on the heating system

Fig. 5 Programming unit (e.g. RC30, with flap open)

USER NOTE

zInformation on operation, e.g. setting

the temperatures, can be found in the

Îdocumentation for the programming

unit.

Operating the heating system

Logano plus GB312 gas-fired condensing boiler - Technical specifications are subject to change without prior notice.8

3.2 Switching off the heating system

zSwitch off the ON/OFF switch on the control panel

(position "0"). This switches off the boiler and all its

components (such as the burner).

zClose the main fuel shut-off valve.

3.3 Emergency measures

In the event of an emergency, e.g. a fire, proceed as fol-

lows:

zClose the main fuel shut-off valve.

zIsolate the heating system from the power supply us-

ing the heating system emergency stop switch or the

relevant domestic fuse.

3.4 Checking the operating pressure, topping up with heating water and bleeding the

system

3.4.1 When do you need to check the operating

pressure?

Newly added heating water loses much of its volume in

the first few days because it releases gases. This caus-

es air pockets, and the heating system will start to rum-

ble.

zWith new heating systems, check the operating pres-

sure daily at first, topping up heating water and

bleeding the radiators if needed.

zLater, check the operating pressure monthly, topping

up heating water and bleeding the radiators if need-

ed.

CAUTION!

SYSTEM DAMAGE

from freezing.

When the heating system is switched off, it

can freeze up in cold weather.

zLeave the heating system permanently

switched on as much as possible.

zProtect your heating system from freez-

ing by draining the pipework for central

heating and DHW at the lowest possi-

ble point.

Operating the heating system 3

Logano plus GB312 gas-fired condensing boiler - Technical specifications are subject to change without prior notice. 9

3.4.2 Checking the operating pressure

Your heating contractor has set the red needle of the

pressure gauge to the required operating pressure (at

least 1 bar).

You can check the design operating pressure for this

heating system on Îpage 2.

zCheck whether the pressure gauge needle is within

the green field.

zIf the pressure gauge needle falls below the green

field, top up the heating water.

3.4.3 Topping up heating water and bleeding the

system

Ask your heating contractor to show you where the boil-

er fill & drain valve for topping up the heating water is lo-

cated on your heating system

zFill the heating system slowly via the filling valve (pre-

existing or fitted by customer). Watch the display

(pressure gauge) as you do so.

zOnce the desired operating pressure is reached, stop

the procedure.

zBleed the heating system via the bleed valves on the

radiators.

zTop up with water if the pressure drops as a result of

bleeding the system.

Fig. 6 Pressure gauge for sealed systems

1Red needle

2Pressure gauge needle

3Green field

CAUTION!

RISK TO HEALTH

from contamination of drinking water.

zAsk your heating contractor to show

you how to fill your heating system with

water.

zAlways observe the regulations and

standards applicable in your country

for the prevention of contamination of

drinking water (e.g. by water from

heating systems). In Europe, observe

standard EN1717.

CAUTION!

SYSTEM DAMAGE

through temperature stresses.

Temperature stresses can cause cracks if

you fill your heating system when it is hot.

The boiler will leak.

zOnly fill the heating system when it is

cold (the flow temperature should be

no more than 40 °C).

Operating the heating system

Logano plus GB312 gas-fired condensing boiler - Technical specifications are subject to change without prior notice.10

The right fuel

This heating system requires fuel of the correct type and

grade to ensure its proper operation.

Consult your heating contractor if you want to switch

over your heating system to a different fuel or operate it

with a fuel with different technical specifications.

Boiler room

CAUTION!

SYSTEM DAMAGE

from frequent top-ups.

If you need to top up the heating water fre-

quently, the heating system might be dam-

aged by corrosion or scaling, depending

on the water quality.

zAsk your heating contractor if you can

add your local water without treating it,

or whether it may need to be treated

first.

zNotify your heating contractor if you of-

ten need to top up with additional water.

CAUTION!

SYSTEM DAMAGE

from the wrong fuel.

zUse only the fuel specified Îpage 2.

CAUTION!

BOILER DAMAGE

from contaminated combustion air.

zNever use chlorinated cleaning agents

or halogenated hydrocarbons (such as

those contained in spray cans, solvents

or cleaning agents, paints and adhe-

sives).

zPrevent heavy accumulations of dust.

CAUTION!

SYSTEM DAMAGE

from water.

zIn case of an acute risk of flooding, dis-

connect the boiler from its power sup-

ply and shut off the fuel supply before

water enters the boiler room

(Îsection 3.2, page 8).

zIf water has entered your heating sys-

tem, have it checked by a professional

technician before starting it up again.

zAny valves, controllers and regulating

equipment that have come into contact

with water must be replaced by a pro-

fessional technician.

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