Baxi Barcelona System Guide de l'utilisateur

Please leave these Instructions with the User

Baxi Barcelona System

Wall Mounted Powered Flue Condensing Boiler

Gas Fired Central Heating Unit

Comp No243612 - Iss 5 - 4/00

Installation and

Servicing Instructions

Natural Gas

Baxi Barcelona System

G.C.No41 075 03

Baxi Limited is one of the leading manufacturers of domestic

heating products in the UK.

Our first priority is to give a high quality service to our

customers. Quality is designed into every Baxi product -

products which fulfil the demands and needs of customers,

offering choice, efficiency and reliability.

To keep ahead of changing trends, we have made a

commitment to develop new ideas using the latest

technology - with the aim of continuing to make the products

that customers want to buy.

Baxi is also the largest manufacturing partnership in the

country. Everyone who works at the company has a

commitment to quality because, as shareholders, we know

that satisfied customers mean continued success.

We hope you get a satisfactory service from Baxi. If not,

please let us know.

The boiler meets the requirements of Statutory Instrument

“The Boiler (Efficiency) Regulations 1993 No3083” and is

deemed to meet the requirements of Directive 92/42/EEC on

the energy efficiency requirements for new hot water boilers

fired with liquid or gaseous fuels:-

Type test for purpose of Regulation 5 certified by:

Notified Body 0086.

Product/Production certified by:

Notified Body 0086.

For GB/IE only.

Baxi is a BS-EN ISO 9001

Accredited Company

Contents - Page 3

Section

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

10.0

11.0

12.0

13.0

14.0

15.0

Introduction

General Layout

Appliance Operation

Technical Data

Dimensions and Fixings

System Details

Site Requirements

Installation

Electrical

Commissioning the Boiler

Fitting the Outer Case

Servicing the Boiler

Changing Components

Fault Finding

Short Parts List

Page

1.0 Introduction - Page 4

Baxi Limited declare that no substances harmful to

health are contained in the appliance or used during

appliance manufacture.

NOTE: This appliance must be installed in accordance

with the manufacturer’s instructions and the regulations

in force, and only used in a suitably ventilated location.

All systems must be thoroughly flushed and treated with

inhibitor (see Section 6.2).

Read the instructions fully before installing or using the

appliance.

1.1 Description

1. The Baxi Barcelona System is a gas fired room sealed

fan assisted condensing central heating system boiler.

2. The maximum output of the boiler is preset at 80,000

Btu/hr. The boiler will automatically adjust down to 30,000

Btu/hr according to the system load. If required, the output

can be set to 100,000 Btu/hr. Please refer to section 8.7.

3. It is designed for use on Natural Gas (G20).

4. The boiler is suitable for sealed central heating and

domestic hot water systems.

5. A label giving details of the model, serial number and Gas

Council number is situated on the rear of the lower door

panel (Fig. 1).

6. The boiler data badge is positioned on the air box door

(Fig. 2).

7. The boiler is intended to be installed in residential /

commercial / light industrial E.M.C. environments on a

governed meter supply only.

8. The boiler must be installed with one of the purpose

designed flues such as the standard horizontal flue kit, part

no236921.

1.2 Optional Extras

“Benchmark” Log Book

As part of the industry-wide “Benchmark” intiative all Baxi

boilers now include an Installation, Commissioning and

Service Record Log Book. Please read the Log Book

carefully and complete all sections relevant to the appliance

and installation. These include sections on the type of

controls employed, flushing the system, burner operating

pressure etc. The details of the Log Book will be required in

the event of any warranty work. Also, there is a section to be

completed at each subsequent regular service visit.

KIT

FLUE EXTENSION KITS (110/70)

Flue Extension 0.25M

Flue Extension 0.5M

Flue Extension 1 M (use two kits for 2M etc.)

Flue Bend x 2 - 45o(Reduce all length of flue by 0.5m

when fitting this bend)

Flue Bend - 90o(Reduce overall length of flue by 1m

when fitting each bend)

VERTICAL FLUE (110/70)

PART No

241692

241694

241695

241689

241687

Vertical Flue Terminal

Vertical Boiler Connection

VERTICAL FLUE (80/80)

Kit Boiler Connection Twin

CONTROL ACCESSORIES

Integral Electronic Twin Channel Timer Kit

242802

242886

242757

242834

2.0 General Layout - Page 5

2.1 Layout (Figs. 3,4 & 5)

1. Wall Plate

2. Flue Elbow

3. Heat Exchanger

4. Burner

5. Air Box

6. Fan Protection Thermostat

7. Fan Assembly

8. Condensate Trap

9. User Interface (optional timer available)

10. Gas Tap

11. Gas / Air Ratio Valve

12. Electronics Housing

13. Transformer

14. Flow Temperature Safety Thermostat - Black

15. Flow Temperature Thermistor - Red

16. Flow Switch (dry fire protection)

17. Circulation Pump

18. Automatic Air Vent

19. Pressure Relief Valve

20. Water Pressure Gauge

21. Expansion Vessel

3.0 Appliance Operation - Page 6

3.1

1. Pump Overrun: When the switched live to the boiler

switches on or the flow temperature is greater than the set

point or anti-cycle finishes then Pump Overrun occurs for 10

seconds (cold) or 60 seconds (hot). The pump is on while

the fan, spark generator and gas valve are off.

2. Fan Purge: When pump overrun has finished if the flow

temperature is less than that set on the thermostat knob then

Fan Purge occurs. The pump and fan are on while the spark

generator and gas valve are off.

3. Ignition: When fan purge has finished Ignition occurs.

The pump, fan, spark generator and gas valve are on. The

burner ignites at mid rate.

4. Burner On: When a flame is detected during the ignition

period then Burner On occurs. The pump, fan and gas valve

are on while the spark generator is off. Flow temperature is

controlled by varying the fan speed (and thereby the gas

rate) to achieve optimum operation.

5. Anti-cycle: When all the TRVs shut down during Burner

On or Pump Overrun finishes and flow temperature is

greater than set point then Anti-cycle occurs. The pump, fan,

spark generator and gas valve are switched off.

6. Ignition Lockout: When 5 ignition attempts have been

made without a flame being detected then Ignition Lockout

occurs. The pump, fan, spark generator and gas valve are

switched off. The lockout light flashes once a second. The

boiler can only be reset manually using the thermostat knob.

7. No Water Flow: When there is No Water Flow through

the boiler (indicated by the flow switch) then a continuous

cycle of Pump Overrun and Anti-cycle occurs.

4.0 Technical Data - Page 7

5.0 Dimensions and Fixings - Page 8

6.0 System Details - Page 9

6.1 Water Circulating Systems

1. The appliance is suitable for fully pumped sealed systems

only.

The following conditions should be observed on all

systems:

•The boiler must not be used with a direct cylinder.

•Drain cocks should be fitted to all system low points.

•All gas and water pipes and electrical wiring must be

installed in a way which would not restrict the servicing

of the boiler.

•Air vents should be fitted to all system high points.

•An air rejection separator is recommended to ensure

correct operation of all appliance components.

6.2 Treatment of Water Circulating Systems

•All recirculatory water systems will be subject to

corrosion unless an appropriate water treatment is

applied. This means that the efficiency of the system will

deteriorate as corrosion sludge accumulates within the

system, risking damage to pump and valves, boiler

noise and circulation problems.

•When upgrading existing systems that exhibit evidence

of sludging, it is advisable to clean the system prior to

treatment in order to remove any sludge and reduce the

likelihood of these deposits damaging new components.

•When fitting new systems flux will be evident within the

system, which can lead to damage of system

components.

•All systems must be thoroughly drained and flushed out.

The recommended flushing and cleansing agents are

Betz-Dearborn Sentinel X300 or X400 and Fernox

Superfloc Universal Cleanser which should be used

following the flushing agent manufacturer’s instructions.

•System additives - corrosion inhibitors and flushing

agents/descalers should be suitable for aluminium and

comply to BS 7593 requirements. The only system

additives recommended are Betz-Dearborn Sentinel

X100 and Fernox-Copal which should be used following

the inhibitor manufacturer’s instructions.

Failure to flush and add inhibitor to the system will

invalidate the appliance warranty.

•It is important to check the inhibitor concentration after

installation, system modification and at every service in

accordance with the manufacturer’s instructions. (Test

kits are available from inhibitor stockists.)

•For information or advice regarding any of the above

contact the Baxi Helpline.

6.0 System Details - Page 10

6.3 Pipework

1. The sizes of flow and return pipes from the boiler should

be determined by normal methods, according to the

requirements of the system. The connection to the boiler is

22mm (copper tail).

2. Due to space requirements at the rear of the tap bracket,

pipework should comprise of solder fittings.

3. A 20oC (36oF) drop in temperature across the system is

recommended for condensing boilers. Existing radiators may

be oversized and so allow this, but where radiator sizing is

marginal it may be advisable to retain a system temperature

drop of 11oC (20oF).

4. In systems using non-metallic pipework it is necessary to

use copper pipe for the boiler Flow and Return. The copper

must extend at least 1 metre from the boiler and include any

branches (Fig. 8a).

6.4 System Controls

1. For optimum operating conditions, the heating system

into which the boiler is installed should include a control

system.

2. Such a system will comprise of a timer control and

separate room or cylinder thermostats as appropriate. (An

integral twin channel programmer is available as an optional

extra).

3. The boiler should be controlled so that it operates on

demand only.

4. Operation of the system under control of the boiler

thermostat & TRV’s only does not produce the best results.

6.5 Thermal Stores

1. The Barcelona System Boiler must not be fitted to

thermal stores which override the boiler control system.

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