Bosch GWH 10-2 G Series Technisches Dokument

Installation Manual and Operating Instructions

Gas Water Heaters

GWH 10-2 G... | GWH 13-2 G... | GWH 16-2 G...

6 720 608 992 (2018/01) AU

Table of contents

6 720 608 992 (2018/01)

Table of contents

1 Key to symbols and safety instructions . . . . . . . . . . 3

1.1 Explanation of symbols . . . . . . . . . . . . . . . . . 3

1.2 Safety information . . . . . . . . . . . . . . . . . . . . . 3

2 Technical Characteristics and Dimensions . . . . . . . 5

2.1 General Description . . . . . . . . . . . . . . . . . . . 5

2.2 Explanation of Model Code . . . . . . . . . . . . . . 5

2.3 Package contents . . . . . . . . . . . . . . . . . . . . . 5

2.4 Description of the heater . . . . . . . . . . . . . . . 5

2.5 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.6 Functional diagram of the heater . . . . . . . . . 7

2.7 Electrical diagram . . . . . . . . . . . . . . . . . . . . . 8

2.8 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.9 Technical characteristics . . . . . . . . . . . . . . . 9

3 Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.1 Important information . . . . . . . . . . . . . . . . . 10

4.2 Selection of the place of installation . . . . . 10

4.3 Heater mounting . . . . . . . . . . . . . . . . . . . . . 11

4.4 Water connection . . . . . . . . . . . . . . . . . . . . 11

4.5 Hydrogenerator operation . . . . . . . . . . . . . 11

4.6 Pressure Relief . . . . . . . . . . . . . . . . . . . . . . 11

4.7 Gas connection . . . . . . . . . . . . . . . . . . . . . . 12

4.8 Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

5 Operating instructions . . . . . . . . . . . . . . . . . . . . . . . 13

5.1 Digital display - description . . . . . . . . . . . . 13

5.2 Before starting up the heater . . . . . . . . . . . 13

5.3 Turning the heater on and off . . . . . . . . . . . 13

5.4 Water flow . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5.5 Gas adjustment . . . . . . . . . . . . . . . . . . . . . . 14

5.6 Temperature/flow adjustment . . . . . . . . . . 14

5.7 Draining the appliance . . . . . . . . . . . . . . . . 14

6 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

6.1 Inlet pressure adjustment . . . . . . . . . . . . . . 16

6.2 Burner pressure adjustment . . . . . . . . . . . . 16

6.3 Conversion to a different type of gas . . . . . 16

7 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

7.1 Flue gas safety device . . . . . . . . . . . . . . . . . 17

8 Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

8.1 Problem/cause/solution . . . . . . . . . . . . . . . 18

9 Environmental protection . . . . . . . . . . . . . . . . . . . . 19

10 Water quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

11 Warranty details 20

Key to symbols and safety instructions

6 720 608 992 (2018/01)

1 Key to symbols and safety

instructions

1.1 Explanation of symbols

Warnings

Keywords indicate the seriousness of the hazard in terms of the

consequences of not following the safety instructions.

•NOTICE indicates that material damage may occur.

•CAUTION indicates that minor to medium injury may

occur.

•WARNING indicates that serious injury may occur.

•DANGER indicates possible risk to life.

Important information

Additional symbols

1.2 Safety information

If you smell gas:

▶ Close the gas supply valve.

▶ Open the windows.

▶ Do not operate any electrical

appliances or switches (on/off).

▶ Extinguish other sources of ignition.

▶ Go to a different location and call the

gas supplier or an authorised

technician.

If you smell combustion gases:

▶ Turn off the heater.

▶ Open doors and windows.

▶ Notify an authorised technician.

Assembly, modifications

▶ The assembly and modifications to

the heater can only be performed by

an authorised installer.

▶ Do not modify the pipes which

conduct combustion gases.

▶ Do not close or reduce air circulation

vents.

Maintenance

▶ We recommend the system be

serviced regularly to ensure it

functions reliably and safely.

▶ The installer is responsible for the

safety and environmental

compatibility of the installation.

▶ The heater should be serviced

annually.

▶ Only original spare parts must be

used.

Explosive and highly inflammable

material

▶ Do not use or store flammable

materials in or near this appliance.

Warnings in this document are framed and

identified by a warning triangle which is printed

on a grey background.

Electrical hazards are identified by a lightning

symbol surrounded by a warning triangle.

Important information in cases where there is no

risk of personal injury or material losses is

identified by the symbol shown on the left. It is

bordered by horizontal lines above and below

the text.

Symbol Meaning

▶ a step in an action sequence

a reference to a related part in the document or

to other related documents

• a list entry

–a list entry (second level)

Table 1

Key to symbols and safety instructions

6 720 608 992 (2018/01)

Combustion air and surrounding air

▶ To avoid corrosion, the combustion

air and surrounding air must be free

from harmful substances (e.g.

halogenated hydrocarbons which

contain chlorine and fluorine

compounds).

▶ Do not spray aerosols in the vicinity of

this appliance while it is in operation.

Information to the customer

▶ Inform the customer about how to

operate the heater.

▶ This appliance is not intended for use

by persons (including children) with

reduced physical sensory or mental

capabilities.

Children should be supervised to

ensure they do not play with the

appliance.

▶ Caution customers against

performing modifications or repairs

themselves.

Tobe installed and serviced only byan

authorised person

The “authorised installing person” is

responsible for:

▶ Correct commissioning of this

appliance.

▶ Ensuring the appliance performs to

the specifications stated on the rating

label.

▶ Demonstrating the operation of the

appliance to the customer before

leaving.

▶ Handing these instructions to

customer.

THIS APPLIANCE IS NOT FOR USE AS A

POOL OR SPA POOL HEATER.THIS

APPLIANCE IS ONLY TO BE INSTALLED

INDOORS.

Do not modify this appliance.

Technical Characteristics and Dimensions

6 720 608 992 (2018/01)

2 Technical Characteristics and

Dimensions

2.1 General Description

The appliance has been AS/NZS 5263.1.2 tested.

2.2 Explanation of Model Code

2.3 Package contents

•Gasheater

• Fixing Brackets

• flexible water pipes

• Gas regulator

•Heaterdocumentation

2.4 Description of the heater

Designed for convenience, the heater is ready to operate by

simply pressing a switch.

• Heater for wall-mounting

• Ignitionbyelectronicdevicetriggeredwhenthewater valve

opens

• Hydrodynamic generator produces sufficient energy to

ignite and control the heater.

• Gauge to display temperature, burner operation and error

codes

• Temperature sensor to monitor the water temperature at

the heater outlet

• Available in Natural gas or LP gas

• Temporary pilot burner which only functions during the

period between the opening of the water valve and the

ignition of the main burner

• Water valve made of fibreglass-reinforced polyamide, and

is 100% recyclable

• Automatic control of the water flow to allow for variable

water supply pressure.

• Gas flow adjustment proportional to the water flow to

maintain a constant temperature.

•Safetydevices:

– Ionisation probe to check for accidental extinction of

the burner flame

– Flue gas safety device which turns off the heater in

cases where the evacuation of flue gases is inadequate

– Overtemperature switch which prevents overheating

of the heat exchanger.

Model GWH 10/13/16 -2 G..

Category CONTINUOUS FLOW

Type INTERNAL

Table 2

Type l/min Series Ignition Gas Types

GWH 10 2 G NG / LP gas

GWH 13 2 G NG / LP gas

GWH 16 2 G NG / LP gas

Table 3

Technical Characteristics and Dimensions

6 720 608 992 (2018/01)

2.5 Dimensions

Fig. 1

[1] Front cover

[2] Opening in rear panel for mounting on the wall

[3] Temperature/volume selector

[4] Gas adjustment

[5] Digital display

[6] Switch/LED - Low water pressure indicator

[7] LED - Burner status check

[8] Gas connection

[9] Connection collar for flue

[10] Draught diverter

[11] Copper Heat exchanger

[12] Burner

[13] Gas valve

[14] Ignition unit

Dimensions

(mm)

A B C D E F G H (Ø)

Natural gas LP gas

GWH10... 310 580 228 115 463 60 25 20 15

GWH13... 350 655 228 140 510 95 30 20 15

GWH16... 425 655 334 140 540 65 30 20 15

Table 4 Dimensions

Technical Characteristics and Dimensions

6 720 608 992 (2018/01)

2.6 Functional diagram of the heater

Fig. 2 Functional diagram

[1] Pilot burner

[2] Ignition Electrode

[3] Ionisation probe

[4] Heat exchanger

[5] Main burner

[6] Injector

[7a] Burner pressure test point

[7b] Gas inlet pressure test point

[8] Slow ignition valve

[9] Venturi

[10] Temperature/volume selector

[11] Water valve

[12] Plunger

[13] Water flow regulator

[14] Water filter

[15] Hydrogenerator

[16] Cold water pipe

[17] Diaphragm

[18] Main gas valve

[19] Maximum gas adjusting screw

[20] Gas supply pipe

[21] Gas filter

[22] Hot water pipe

[23] Ignition unit

[24] Temperature sensor

[25] Servo valve

[26] Power selector

[27] Gas valve

[28] Pilot valve

[29] Pilot injector

[30] Pilot gas pipe

[31] Overtemperature switch

[32] Flue gas safety device

[33] Relief Valve/Drain screw

12 345

171819207b21

6720608992-05.1V

Technical Characteristics and Dimensions

6 720 608 992 (2018/01)

2.7 Electrical diagram

Fig. 3 Electrical diagram

[1] Ignition electrode

[2] Ignition unit

[3] Switch/LED - Low water pressure indicator

[4] Digital display

[5] Ionisation probe

[6] Flue gas safety device

[7] Overtemperature switch

[8] Temperature sensor

[9] Pilot solenoid (Normally Closed)

[10] Diaphragm valve

[11] Main Solenoid (Normally Open)

[12] Hydrogenerator

[13] LED - Burner status check

2.8 Function

This gas heater is equipped with automatic electronic ignition

to simplify operation.

▶ To activate, just turn on the switch (Fig. 8).

After this, automatic ignition occurs whenever a hot water tap

is opened. First, the pilot burner is lit and approximately four

seconds later the main burner ignites. The pilot burner flame is

extinguished after the main burner lights.

This is a way of saving a great amount of energy as the pilot

burner only operates for the minimum necessary time to ignite

the main burner.

Regulations

6 720 608 992 (2018/01)

2.9 Technical characteristics

3Regulations

Any local by-laws and regulations pertaining to installation and

use of gas-heated appliances must be observed.

This appliance must be installed in accordance with the

manufacturers installation instructions, AS5601, NZ5261 and

all Local Building & Gas fitting regulations

It is recommended that for sanitary fixtures used for the

purpose of personal hygiene, that a temperature limitingl

device be fitted (such as a tempering valve) as per AS3498.

This appliance must not be installed in a bedroom, bathroom,

toilet, or combined living/sleeping room as per AS5601

5.12.5.2.

Failure to install this appliance in accordance with these

installation instructions will void the warranty.

4 Installation

Technical characteristics Units GWH10 GWH13 GWH16

Gas Consumption

Nominal Gas Consumption MJ 79 100 (NG) 127

97 (LP gas)

Supply pressure

Natural gas H kPa 1.13 1.13 1.13

LP gas kPa 2.75 2.75 2.75

Number of injectors 12 14 18

Water data

Maximum permissible pressure kPa 1000 1000 1000

Temperature selector in fully clockwise position

Temperature rise °C 50 50 50

Flow range l/min 2.2 - 4.6 2.2 - 6.2 2.2 - 8.6

Minimum operating pressure kPa 35 35 50

Minimum pressure for maximum flow kPa 50 60 80

Temperature selector in fully anti-clockwise position

Temperature rise °C 25 25 25

Flow range l/min 4 - 10 4 - 13 4 - 15

Minimum operating pressure kPa 45 45 50

Minimum pressure for maximum flow kPa 100 140 170

Table 5

DANGER:

This appliance must not be installed in a

bedroom, bathroom, toilet or combined living/

sleeping room in accordance with AS5601.

DANGER: Explosion Risk

▶ Always turn off the gas cockbefore carrying

out any work on components which carry

gas.

The gas installation, connection of the flue and

supply pipes, as well as the initial startup are to

be performed exclusively by an authorised

person.

Installation

6 720 608 992 (2018/01)

4.1 Important information

▶ Install in accordance with AS5601, AS/NZS3500.4.2,

NZS5261 and all local building, water and gas fitting

regulations particularly with regard to ventilation

requirements.

▶ Do not place articles on or against this appliance.

▶ Install gas and water isolation valves as close as possible to

the heater.

▶ After finishing the gas piping system, the pipes must be

thoroughly purged and leak-tested. To avoid damaging the

gas valve by excess pressure, this test must be performed

with the gas valve of the heater closed.

▶ Check if the heater corresponds to the type of gas

provided.

▶ Ensure the flow and pressure through the regulator are

appropriate for the consumption of the heater (see

technical data in the table 5).

4.2 Selection of the place of installation

Requirements regarding the place of installation

• Comply with the specific instructions for each State.

• Install the gas heater in a well-ventilated location where it

will not be exposed to temperatures below zero. Ensure

combustion gases are flued to outside atmosphere in

accordance with AS5601.

• To avoid corrosion, the combustion air must be free from

harmful substances. Examples of particularly corrosive

substances: halogenated hydrocarbons contained in

solvents, paints, glues, hairsprays and various domestic

detergents. If necessary, take adequate measures.

• Install the appliance in accordance with the minimum

installation clearances indicated in Fig.NOT DEFINED.

• The gas heater must not be installed over a heat source.

• Do not obstruct the openings at top and bottom of

appliance.

• Top and bottom areas must be clear from any obstacles at

least 30 cm.

In case of a frost risk:

▶ Turn off the heater.

▶ Drain the heater (see section 5.7)

Fig. 4 Minimum clearances

Combustion gases

This appliance should only be installed in

applications where cold water temperature

does not exceed 40 °C.

The use of these heaters with water supply

pressure values below 50 kPa is not

recommended. This appliance requires a

minimum flow rate of 2.5lpm to operate. Water

fixtures with a flow rate of 6lpm for hand basins

and 8.5lpm for shower roses are

recommended.

Installation in a marine environment should be

avoided.

Not suitable for pool, spa pool or solar

application.

Ventilation requirements as per AS5601.

Use single or twin skin flue in accordance with

AS5601.

6720608992-01.1Av

180

£140

³100

3 3

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