Baxi Genesis 80 Guida utente

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Please leave these Instructions with the User

Baxi Genesis

Gas Fired Wall Mounted Combination Boiler

Natural Gas, Propane & Butane

Comp No. 236463 - 10/96

Baxi Genesis 80 – G.C.No47 077 01

Baxi Genesis 96 – G.C.No47 077 02

Installation

and

Servicing

Instructions

Supplied By www.heating spares.co Tel. 0161 620 6677

Genesis Baxi Heating Ltd.

44 - 45

Baxi Heating Ltd is one of the leading manufacturers of

domestic heating products in the U.K.

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

customers. Quality is built into every Baxi product -products

which fulfil the demands and needs of consumers, 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

Baxi is a BS-EN ISO 9002 Accredited Company

Supplied By www.heating spares.co Tel. 0161 620 6677

Genesis Baxi Heating Ltd.

Contents – Page 3

Introduction PAGE 4

General Layout PAGE 5

Appliance Operation PAGE 6

Technical Data PAGE 7-8

General Dimensions & Fixings PAGE 9

System Details PAGE 10-12

Central Heating circuit

Bypass

System Control

System Filling & Pressurising

Pressure Vessel

Pressure Relief Valve

Domestic Hot Water Circuit

Showers

Hard Water Areas

Site Requirements PAGE 13-16

B.S. Codes of Practice

Clearances

Location

Ventilation of Compartments

Gas Supply

Electrical Supply

Flue

Terminal Guard

Installation PAGE 17-24

Initial Preparation

Flushing

Preparing the Boiler

Fitting the Boiler

Fitting the Flue

Making the Electrical Connections

Commissioning the Appliance PAGE 26

Servicing The Appliance PAGE 27

Changing Components PAGE 28-41

Pressure Switch

Fan

Gas Valve Solenoids

Domestic Hot Water Heat Exchanger

Heat Exchanger

Pump

PCB & Spark Generator

Thermistors

Safety Thermostat

Expansion Vessel

Pressure Relief Valve

Pressure Gauge

Flow Switches

Flame Sensing Probe

Spark Electrode

Injector Manifold

3-Way Valve

Water Filters

Automatic Air Vent

Flow Regulator

Fault Finding PAGE 42-50

Short Parts List PAGE 51

Supplied By www.heating spares.co Tel. 0161 620 6677

Genesis Baxi Heating Ltd.

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Introduction – Page 4

Description

The Baxi Genesis is a fully automatic gas fired wall mounted

combination boiler. It is room sealed and fan assisted, and

will serve central heating and mains fed domestic hot water.

Genesis 80

The boiler is preset to give a maximum output of 23.25 kW

(79,347 Btu/hr) for both hot water and central heating

modes.

Genesis 96

The boiler is preset to give a maximum output of 28.0 kW

(95,555 Btu/hr) for both hot water and central heating

modes.

It is designed for use on natural gas (G20). Using the

conversion kit it can be used on LPG (Propane G31 or

Butane G30).

The boiler is suitable for use only on fully pumped sealed

heating systems. Priority is given to domestic hot water.

The appliance data badge is positioned on the electrical box

behind the outer case.

A label on the user door panel gives details of the model,

serial number and Gas Council number.

Optional Extras

KIT PART No

Flue extension 1 M (Use two kits for 2M etc.) 236439

Flue Extension 0.25M 238605

Flue Extension 0.5M 238604

DHW Expansion Vessel Kit 238395

Wall liner/internal fixing 236441

Programmable room thermostat 24 hr. 236254

Programmable room thermostat 7 day 238326

Integral 7 day Electronic Timer Kit 238399

Integral 12 hr. AM/PM 8ectro-Mechanical

Timer Kit 238398

80 LPG Conversion - Propane & Butane 235983

96 LPG Conversion - Propane & Butane 237474

Flue bend - 45º 236467

Flue bend - 90º 236466

Vertical Flue Equipment -

See Installer’s Guide or Notes For Guidance

Supplied By www.heating spares.co Tel. 0161 620 6677

Genesis Baxi Heating Ltd.

General Layout – Page 5

1Chassis with Expansion Vessel

2Combustion Box

3Fan Assembly

4Primary Heat Exchanger

5Combustion Chamber

6Burner Assembly and Electrodes

7Gas Valve Assembly

8Automatic Air Seperator and Vent

9Flow Switch Heating Circuit

10 Flow Switch DHW Circuit

11 Circulation Pump

12 Electrical Box

13 Safety Thermostat

14 By-Pass Valve

15 DHW Thermostat Sensor

16 CH Thermostat Sensor

17 Three Way Valve

18 DHW Plate Heat Exchanger

19 Selector Switch On-Off

20 DHW Temperature Adjustment

21 Heating Temperature Adjustment

22 Heating Temperature Indicator

23 Green Light - Power On

24 Orange Light - Boiler On

25 Red Light - Flame Failure

26 Flame Failure Reset Button

27 Pressure Gauge

28 Pressure Switch

29 Isolating Valves

30 Optional Integral Timers

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Genesis Baxi Heating Ltd.

44 - 45

Appliance Operation – Page 6

CENTRAL HEATING MODE

With a demand for heating the pump (11) circulates water

through the primary circuit. At a flow rate of approximately

250 I/hr the central heating flow switch (9) operates,

commencing the ignition sequence.

The main burner (6) ignites at 1/3 rate then switches to full

gas rate. The gas valve (7) controls the gas rate “HIGH -

LOW” to maintain the heating temperature measured by the

thermostat sensor (16).

When demand is satisfied the burner is extinguished, the

pump continues to run. The duration of each OFF cycle is 3

minutes before re-lighting automatically. Each ON cycle

commences with a 45 second duration at third gas rate

before switching to full rate if necessary.

On completion of a heating period the pump will continue to

run for a period of 3 minutes (PUMP OVERRUN).

DOMESTIC HOT WATER MODE

Priority is given to hot water supply. A demand at a tap or

shower will override any central heating requirement.

The flow of cold water will operate the DHW flow switch (10)

which requests the 3 way valve (17) to change position to

allow the pump (11) to circulate the primary water through

the secondary DHW heat exchanger (18).

The appliance-will light automatically and the temperature of

the domestic water is controlled by the thermostat sensor

(15).

When the hot water demand ceases the burner will

extinguish and for a period of 3 minutes the appliance

remains ready in the DHW mode before returning to the

central heating mode.

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Genesis Baxi Heating Ltd.

Technical Data – Page 7

GENESIS 80

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Genesis Baxi Heating Ltd.

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Technical Data – Page 8

GENESIS 96

Supplied By www.heating spares.co Tel. 0161 620 6677

Genesis Baxi Heating Ltd.

General Dimensions and Fixings – Page 9

Supplied By www.heating spares.co Tel. 0161 620 6677

Genesis Baxi Heating Ltd.

44 - 45

System Details – Page 10

The Genesis Combination Boiler is a ‘Water Byelaws

Scheme - Approved Product’.

To comply with the Water Byelaws your attention is

drawn to the following installation requirements and

notes (IRN).

1) IRN 001 - See text of entry for installation requirements

and notes.

2) IRN 116- Byelaw 90 and 91.

3) IAN 302 - Byelaw 14.

Reference to the WRc publications, ‘Water fittings and

materials directory’ and ‘Water supply byelaws guide’ give

full details of byelaws and the IRNs.

Central Heating Circuit

The appliance is suitable for fully pumped SEALED

SYSTEMS ONLY.

All systems should be thoroughly flushed prior to

connection of the appliance. If the installation is on an

existing sealed system, or a modified open system, it is

particularly important to flush preferably using an

appropriate descaling/flushing agent.

Where used, corrosion inhibitors, flushing agents/descalers

should be approved and suitable for all system metals.

BYPASS

The appliance has an integral pre-set bypass, therefore no

external bypass on the system is required. TRV’s can be -

used on all radiators.

SYSTEM CONTROL

Operation of the system under control of the boiler

thermostat only does not produce the best results. The

heating system should include a control system. This should

comprise of at least a single channel timer.

Integral Single Channel Timer Kits are available as optional

extras.

For optimum operating conditions and best economy the

fitting of a programmable thermostat is recommended.

Programmable thermostats - the ‘Baxi Genesis

Controllers’ are available as an optional extra.

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