Baxi 35/80 IE Note de version

Installation & Servicing Instructions

Baxi System

35/80 IE & 60/100 IE

Gas Fired Wall Mounted System Boiler

Please keep these instructions safe.

Should you move house, please hand

them over to the next occupier.

Page 1

Natural Gas

Baxi System 35/80 IE

Baxi System 60/100 IE

Baxi 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.

Everyone who works at Baxi has a commitment to quality because 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 No 3083" 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 0051.

Product/Production certified by: Notified Body 0051.

For IE only.

Baxi is a BS-EN ISO 9001

Accredited Company

Page 2

Contents

Section Page

1.0 Introduction 4

2.0 General Layout 5

3.0 Appliance Operation 6

4.0 Technical Data 7

5.0 Dimensions and Fixings 9

6.0 System Details 10

7.0 Site Requirements 12

8.0 Installation 17

9.0 Commissioning the Boiler 26

10.0 Completion 28

11.0 Servicing the Boiler 29

12.0 Changing Components 31

13.0 Illustrated Wiring Diagram 39

14.0 Fault Finding 40

15.0 Short Parts List 43

Page 3

1.0 Introduction

Baxi declare that no substances harmful to health are contained in the appliance or

used during appliance manufacture.

1.1 Description

1. The Baxi System 35/80 IE and 60/100 IE are fully automatic gas fired wall mounted system

boilers. They are room sealed and fan assisted.

2. The boilers are set to give a maximum output of 24.0kW (35/80 IE) or 29.3kW (60/100 IE).

3. They are designed for use on Natural Gas (G20) and can be converted to use Propane

(35/80 IE & 60/100 IE) or Butane (35/80 IE).

4. The boiler incorporates a circulating pump and expansion vessel. It is suitable for use only

on fully pumped sealed systems.

5. The boiler data badge gives details of the model and serial number and is situated on the

control box. It is visible when the case front panel is removed (Fig. 1).

Fig. 1

NOTE: This appliance must be installed in accordance with the manufacturer's

instructions and the regulations in force. Read the instructions fully before installing

or using the appliance.

6. The boiler is intended to be installed in residential / commercial / light industrial E.M.C.

environments on a governed meter supply only.

7. The boiler must be installed with one of the purpose designed flues such as the standard

horizontal flue kit, part no. 247719.

8. All systems must be thoroughly flushed and treated with inhibitor (see section 6.1).

1.2 Installation

The installation must be carried out by a Competent Person and installed in accordance with

the current edition of I.S. 813 "Domestic Gas Installations", the current Building Regulations

and reference should be made to the current ETCI Rules for Electrical Installation.

1.3 Optional Extras

Various flue extensions, bends, vertical flue kits,control accessories etc. are available as

optional extras. These are detailed in a separate publication.

Page 4

2.0 General Layout

2.1 Layout

1. Air Pressure Switch

2. Expansion Vessel

3. Burner Manifold

4. Automatic Air Vent

5. Circulation Pump

6. Drain Off Point

7. Pressure Relief Valve

8. DHW Relay PCB

9. System Pressure Gauge

10. PCB

11. Control Box

12. Flame Sensing Electrode

13. Spark Electrode

14. Burner

15. Primary Heat Exchanger

16. Fan Assembly

17. On/Off/Reset Selector Switch

18. Central Heating Temperature Control

19. Flame Failure

20. Safety Thermostat

21. Fault on Fan or Flue

22. Fault on Pump or Low System Pressure

23. Temperature Indication Only

24. Fault on Central Heating Sensor

25. Power On

26. Hot Water Mode

27. Central Heating Mode

28. Burner On

When neons 19 to 24 are constantly illuminated, they indicate the temperature of the central

heating water.

Page 5

3.0 Appliance Operation

Boiler Primary Circuit

3.1 Operating Mode (Fig. 2)

Fig. 2

Key

1 Heat Exchanger

2 Burner

3 Ignition Electrode

4 Flame Sensing Electrode

5 Gas Valve

6 Pump

7 Automatic Air Vent

8 Pressure Relief Valve

9 Boiler Drain Point

10 Gas Inlet

11 Boiler Flow

12 Boiler Return

13 Pressure Gauge

14 Automatic By-Pass

15 Hydraulic Differential Pressure Sensor

16 Safety Thermostat

17 Central Heating Temperature Sensor

18 Expansion Vessel

19 Water Heating Sensor

1. With a demand for heating, the pump circulates water through the primary circuit. At a pre-

determined flow rate the hydraulic differential pressure switch operates, initiating the ignition

sequence.

2. The main burner ignites at low rate, then the gas valve controls the gas rate to maintain the

heating temperature measured by the temperature sensor.

3. When the flow temperature exceeds the setting temperature, a 3 minute delay occurs

before the burner relights automatically (anti-cycling). The pump continues to run during this

period.

4. When the demand is satisfied the burner is extinguished and the pump continues to run for

a period of 3 minutes (Pump Overrun).

IMPORTANT: When the selector switch is in the '0' (Off) position the electrical

supply to the boiler is isolated. The boiler will not operate.

3.2 Frost Protection Mode

1. The frost protection mode is integral to the appliance and functions only with the selector

switch (see Section 2.1) in the domestic hot water and central heating position. If the system

temperature falls below 5°C then the boiler will fire on its minimum setting until a flow

temperature of 30°C is reached. This will only protect the boiler, not the complete system.

Further protection can be incorporated by using a system frost thermostat.

3.3 Pump Protection

1. With the selector switch (see Section 2.1) in either the central heating or central heating

and hot water position the pump will automatically operate for 1 minute in every 24 hours to

prevent sticking.

Page 6

4.0 Technical Data

4.1 System 35/80 IE

Appliance Type C12 C

Appliance Category CATⅡ 2H 3+

Heat Input (Gross)

Max Min

kW 26.3 10.6

Btu/h 89,739 36,170

Heat Output Max Min

kW 24.0 9.3

Btu/h 81,891 31,740

Max Gas Rate (Natural Gas - G20)

(After 10

Mins)

m3/h 2.75

ft3/h 98.12

Burner Pressure (Natural Gas - G20)

Max Rate Min Rate

mbar 12.2 ±0.5 2.5 ±0.5

in wg 4.88 ±0.2 1.0 ±0.2

Inlet Pressure (Natural Gas - G20)

mbar 20

in wg 8

Burner Injector (Natural Gas - G20)

12 x 1.28mm Diameter

Electrical Supply 230V~ 50Hz

(Appliance must be connected to an earthed supply)

Power Consumption 170W

External Fuse

Rating 3A Maximum

Internal Fuse Rating

Fuse 2A Fast Blow to BS 4265

Electrical Protection

IPX5D

NOx

Class 3

Flue Terminal Diameter 100mm

Dimensions Projection 95mm

Connections copper tails

Gas Supply - 3/4"

Central Heating Flow - 3/4"

Central Heating

- 3/4"

Return

Pressure Relief

Discharge - 1/2"

Outercase Dimensions

Casing Height - 780mm

Overall Height Inc

Flue Elbow - 980mm

Casing Width - 450mm

Casing Depth - 345mm

Clearances

Both Sides 5 mm Min

Above Casing 200 mm Min

Below Casing 200 mm Min

Front 450 mm Min (For Servicing)

Front 5 mm Min (In Operation)

Weights kg

Packaged Boiler

Carton 45

Packaged Flue Kit 3

Installation Lift

Weight 37

Central Heating Primary Circuit Pressures

bar

Safety Discharge 3

Max Operating 2.5

Min Operating 0.2

Recommend Operating 1-2

Pump - Grundfos UP 15-60

Available Head See graph below

Expansion Vessel - (Integral with appliance)

bar

Min Pre-charge

Pressure 0.5

litre

Max Capacity of

CH System 125

Primary Water

1.0

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