Buderus SB735 Series Bedienungsanleitung

6302 2319 – 10/2003 US/CA For the user

Please read carefully before use.

Operating Instructions

Condensing Gas Boiler SB735

Series

Preamble

We reserve the right to make any changes due to technical modifications.

Operating Instructions condensing gas boiler Logano plus SB735 • Issue 10/2003

Buderus Heiztechnik GmbH • http://www.heiztechnik.buderus.de

To these instructions

These operating instructions contain important

information for the safe and correct operation and

maintenance of the condensing gas boiler SB735.

Subject to technical modifications.

Constant development may lead to minor deviations of

illustrations, functional steps and specifications from

those described/shown.

Updating your documentation

Pleaseletusknowifyouwouldliketo make suggestions

to improve our documentation, or if you have noticed

any errors.

Correct fuel

This system requires the correct fuel to ensure a proper

operation. During commissioning, your system installer

will enter the correct type of fuel, which your system

requires, into the table below.

This device meets all basic requirements of

relevant standards and guidelines.

Its conformity has been verified. All

associated documents and the original

Declaration of Conformity are available

from the manufacturer.

CAUTION

SYSTEM DAMAGE

through incorrect fuel.

zOnly use the correct fuel identified for

your system.

USER NOTE

We recommend you seek the advice of

your system installer if you intend

changing the fuel for your system.

Use the following fuel:

company stamp/date/signature

Index

We reserve the right to make any changes due to technical modifications.

Operating instructions condensing gas boiler Logano plus SB735 • Issue 10/2003

Buderus Heiztechnik GmbH • http://www.heiztechnik.buderus.de

1 For your safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

1.1 Correct use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

1.2 Notes structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

1.3 Please observe these safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

1.3.1 Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

1.3.2 Working on the heating system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

2 Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

3 Using correct fill and make-up water . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

3.1 Water description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

3.2 Water quality. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

4 System start-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

4.1 Making the system operational . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

4.2 Commissioning the control device and the burner. . . . . . . . . . . . . . . . . . . . . . . .9

5 System shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

5.1 Shutting down the control device and burner. . . . . . . . . . . . . . . . . . . . . . . . . . 10

5.2 Shutting down the system in an emergency . . . . . . . . . . . . . . . . . . . . . . . . . . 10

6 Correcting burner faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

7 System maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

7.1 Why is regular maintenance important? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

7.2 Checking and correcting the water pressure . . . . . . . . . . . . . . . . . . . . . . . . . . 13

7.2.1 When do you need to check the water pressure in your heating system? . . . . . . . . . . . . 13

7.2.2 Open systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

7.2.3 Sealed systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

For your safety1

We reserve the right to make any changes due to technical modifications.

Operating instructions condensing gas boiler Logano plus SB735 • Issue 10/2003

Buderus Heiztechnik GmbH • http://www.heiztechnik.buderus.de

1 For your safety

TheSB735,condensing gas boiler,has been developed

and built employing the latest technologies and safety

regulations.

Ease of operation was given particularly high priority.

Please observe the safety and operator’s instructions to

ensure optimum safe, economical and environmentally-

friendly utilisation of your system.

1.1 Correct use

The SB735 condensing gas-fired boiler was designed

for heating domestic hot water and, for example, the

central heating of multi-occupancy buildings, as well as

public and commercial buildings.

1.2 Notes structure

Two levels of danger are identified and signified by

symbols:

1.3 Please observe these safety

instructions

Incorrect operation of SB 735 boilers may lead to

material losses.

zOnly operate the boiler as intended and when it is in

perfect condition.

zLet a heating contractor install and maintain your

heating system.

zLet your local heating contractor train you properly in

the use of this system.

zPlease read these operating instructions carefully.

WARNING!

DANGER TO LIFE

Identifies possible dangers emanating

froma product, which might lead to serious

injury or death, if appropriate care is not

taken.

CAUTION!

DANGER OF INJURY/

SYSTEM DAMAGE

Points to a potentially dangerous

situation, which might lead to medium or

slight injuries or to material losses.

USER NOTE

User tips for the optimum utilisation and

setting of the equipment plus useful

information.

WARNING!

DANGER TO LIFE

through the explosion of volatile gases.

There is a risk of explosion if you can smell

gas.

zKeep open flames away. Do not

smoke. Do not use lighters.

zAvoid sparks!

Do not operate electrical switches, incl.

telephone, plugs or door-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 gas supplier and your local

heating engineer from outside the

building.

zIf necessary, notify police or fire

services.

zImmediately leave the danger zone if

you hear gas streaming out.

For your safety 1

We reserve the right to make any changes due to technical modifications.

Operating instructions condensing gas boiler Logano plus SB735 • Issue 10/2003

Buderus Heiztechnik GmbH • http://www.heiztechnik.buderus.de

1.3.1 Location 1.3.2 Working on the heating system

WARNING!

Danger to life

through poisoning.

Insufficient ventilation can lead to

dangerous flue gas leaks.

zEnsure that the ventilation and exhaust

air openings are neither restricted nor

closed.

zTheboilermustnotbeoperated,unless

you immediately remedy the fault.

WARNING!

Risk of fire

through flammable material or liquids.

zNever store flammable materials or

liquids in the immediate vicinity of the

heat generator.

CAUTION!

Boiler damage

through contaminated combustion air.

zNever use chlorinated cleaning agents

or halogenated hydrocarbons (as, for

example, contained in spray cans,

solvents or cleaning agents, paints and

adhesives).

zAvoid frequent very dusty

atmospheres.

zNever hang laundry to dry in the boiler

room.

CAUTION!

System damage

through frost.

zEnsure that the boiler room is always

free from frost.

WARNING!

Danger to life

through the explosion of volatile gases.

zEnsurethattheinstallation,thegasand

flue gas connections, the initial start-

up,thepowerconnection,maintenance

and repair work are only carried out by

competent specialists.

zEnsure that work on parts of the gas

installation are only carried out by a

licensed specialist.

CAUTION!

System damage

through inadequate cleaning and

maintenance.

zHave your system inspected, cleaned

andmaintainedannuallyby a specialist

contractor.

zWe recommend you enter into a

contract covering an annual inspection

and maintenance on a "as-required-

basis".

We reserve the right to make any changes due to technical modifications.

Operating instructions condensing gas boiler Logano plus SB735 • Issue 10/2003

Buderus Heiztechnik GmbH • http://www.heiztechnik.buderus.de

Product description2

2 Product description

The following are components of the SB735,

condensing gas-fired boiler (Fig. 1):

–Boiler block (Fig. 1, item 5) incl. thermal insulation

and burner door (Fig. 1, item 4).

The boiler block transfers the heat generated by the

burner to the heating water. The burner door is

designed to carry the burner and to close the

combustion chamber.

–Boiler jacket (Fig. 1, item 3), thermal insulation and

boiler front walls (Fig. 1, item 1).

The boiler shell and thermal insulation prevent

energy loss.

–Control device (Fig. 1, item 2) (Optional).

Thecontroldeviceisdesigned to monitor and control

all electrical components of the SB735.

Fig. 1 SB735, condensing gas-fired boiler

Item 1: Boiler front walls

Item 2: Control device

Item 3: Boiler jacket panel

Item 4: Burner door

Item 5: Boiler block

Using correct fill and make-up water 3

We reserve the right to make any changes due to technical modifications.

Operating instructions condensing gas boiler Logano plus SB735 • Issue 10/2003

Buderus Heiztechnik GmbH • http://www.heiztechnik.buderus.de

3 Using correct fill and make-up water

This chapter contains general information about the

water in your heating system.

Observe the basic, system-specific requirements for

water quality in Chapter 3.2 "Water quality".

3.1 Water description

In your heating system, water is used as heat transfer

medium.Waterisgivendifferentdescriptionsdepending

on its purpose.

–Heating water:

Water contained within your heating system.

–Fill water:

Water used for the first filling of your system before

commissioning.

–Make-up water:

Water used for the re-filling your system in case of

water losses.

We reserve the right to make any changes due to technical modifications.

Operating instructions condensing gas boiler Logano plus SB735 • Issue 10/2003

Buderus Heiztechnik GmbH • http://www.heiztechnik.buderus.de

Using correct fill and make-up water3

3.2 Water quality

All water contains substances, e. g. Ca (HCO3)2

(calcium hydrogen-carbonate), which may influence the

function of your heating system. These may lead to

corrosion, scaling and other deposits.

Regularly check your water consistency and, if

necessary, treat your fill and make-up water, to ensure

that your heating system remains economic, functional,

operationally reliable and energy efficient.

Observe the following table regarding the correct use

and treatment of the fill and make-up water.

This table is an extract from the Code of Practice K8

"Water treatment for hot water heating systems" and the

VDI 2035 "Water treatment guideline".

CAUTION!

SYSTEM DAMAGE

through corrosion and scaling because of

fill and make-up water, which does not

comply with system-specific requirements.

zCheck with your local heating

contractor or your water supply

company regarding the Ca (HCO3)2

concentration (calcium hydrogen-

carbonate) in your area.

zYou should treat the fill and make-up

water,if it does notcomply with system-

specific requirements. In such cases

contact your local heating contractor.

Total rated boiler

output in MBH Ca (HCO3)2 concentration

in mol/m³ Maximum fill and make-up water volume

Vmax in m³ Heating water pH

value

300 < Q ≤ 1600 ≤ 2.0 V max = three times the system volume 8.2–9.5

1601 < Q ≤ 3500 ≤ 1.5

300 < Q ≤ 1600 > 2.0 8.2–9.5

1601 < Q ≤ 3500 > 1.5

Table. 1 Requirements of filling, make-up and heating water

Vmax 0 0313 QkW()

Ca HCO3

()

2mol

----------

⎝⎠

⎛⎞

-------------------------------------------------

⋅,=

System start-up 4

We reserve the right to make any changes due to technical modifications.

Operating instructions condensing gas boiler Logano plus SB735 • Issue 10/2003

Buderus Heiztechnik GmbH • http://www.heiztechnik.buderus.de

4 System start-up

This chapter explains how you prepare the system for

operationand howto commission the control device and

the burner.

4.1 Making the system operational

Youshouldcheckthefollowingto preparethesystem for

operation:

zthe system water pressure see Chapter 7.2

"Checking and correcting the water pressure",

page 13),

zwhether the main fuel supply shut-off valve is open,

zwhether the heating system emergency stop switch

has been activated or the boiler room fuse is

inserted.

Let your specialist show you where the fill valve is

located in the pipework of your system (return).

4.2 Commissioning the control device

and the burner

Start up your boiler via the control device (in this

example(Fig. 2):2000seriesLogamaticcontroldevice).

By commissioning the control device, you also

automatically commission the burner. The burner can

then be started via the control device. For further details

in this connection, see the operating instructions of the

relevant control device or burner.

zSwitch the boiler water thermostat (Fig. 2, item 1) to

"AUT".

zSet the On/Off switch (Fig. 2, item 2) to "I" (ON).

Fig. 2 2000 series Logamatic control device

Item 1: Boiler water thermostat

Item 2: On/Off switch

USER NOTE

zPlease observe the operating

instructions of the control device.

System shutdown5

We reserve the right to make any changes due to technical modifications.

Operating instructions condensing gas boiler Logano plus SB735 • Issue 102003

Buderus Heiztechnik GmbH • http://www.heiztechnik.buderus.de

5 System shutdown

This chapter explains, how you shut down your boiler,

the control device and burner. Furthermore, you will find

explanations as to how you can shut down your system

in emergencies.

zShutoff the fuel supply atthe main fuel shut-off valve.

5.1 Shutting down the control device and

burner

Shut down your boiler via the control device. The burner

is automatically shut down when the control device is

shut down.

zSet the On/Off switch (Fig. 2, page 9) to "0" (OFF).

5.2 Shutting down the system in an

emergency

In other dangerous circumstances, isolate the main fuel

shut-off valve and the electrical power supply of the

system via the boiler room main fuse or the emergency

stop switch for the boiler room (see Chapter 1.3 "Please

observe these safety instructions", page 4).

CAUTION!

SYSTEM DAMAGE

through frost.

The system can freeze up if it is out of use,

e.g. through a shut-down because of

fault(s).

zProtect your heating system against

frost damage, where temperatures

below freezing are expected.

zDrain the heating water at the lowest

point in the system, using the boiler

drain. To do this, open the air vent

valve at the highest point in the system.

USER NOTE

For further details in this connection, see

the operating instructions of the relevant

control device.

USER NOTE

zOnly in an emergency, shut off the

system via the boiler room fuse or

heating system emergency stop switch.

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