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6 720 813 939 (2016/05)

OptiFlow Professional

4 | Product details

Demonstrating the operation of the appliance to the 
customer before leaving.

Handing these instructions to customer.

THIS APPLIANCE IS NOT SUITABLE FOR POOL OR SPA POOL 
APPLICATIONS.
HANDING THE OPERATING INSTRUCTIONS TO THE 
CUSTOMER.
NOT SUITABLE FOR COMMERCIAL BOOSTING OF A WARM 
WATER RECIRCULATION SYSTEM

Regulations

All local by-laws and regulations pertaining to installation and 
use of gas appliances must be observed.

This appliance must be installed in accordance with the 
manufacturers installation instructions, AS/NZS5601, AS/
NZS3500, and all Local Building & Gas fitting regulations.

The appliance must not be installed outdoors. The appliance is 
approved for indoor installation only. Do not install this 
appliance with any modification or alteration.

Failure to install this appliance in accordance with these 
installation instructions will void the warranty and may create 
an unsafe situation.

Safety of electrical appliances for domestic use and similar 

purposes

The following requirements apply in accordance with EN 
60335-1 in order to prevent hazards from occurring when 
using electrical appliances:

“This appliance can be used by children of 8 years and older, as 
well as by people with reduced physical, sensory or mental 
capabilities or lacking in experience and knowledge, if they are 
supervised and have been given instruction in the safe use of 
the appliance and understand the resulting dangers. Children 
must not play with the appliance. Cleaning and user 
maintenance must not be performed by children without 
supervision.”

“If the power cable is damaged, it must be replaced by the 
manufacturer, its customer service department or a similarly 
qualified person, so that risks are avoided.”

2

Product details

2.1

EC Declaration of Conformity

The appliance has been tested and certified to Australian 
Standards.

2.2

Type overview

[GWH]Gas continuous flow water heater
[12] Capacity (l/min)
[1] Generation
[CT] Thermostatic
[D] Digital user interface
[E]

Electric ignition

[23] Appliance set for natural gas
[31] Appliance set for Universal LP gas
[F5] Tight chamber
[L]

Locked water temperature adjustment

Model

GWH12/16/20 1 CTD E23/31 F5 L...

Table 2

GWH

12

1

CT

D

E

23

F5

L

GWH

12

1

CT

D

E

31

F5

L

GWH

16

1

CT

D

E

23

F5

L

GWH

16

1

CT

D

E

31

F5

L

GWH

20

1

CT

D

E

23

F5

L

GWH

20

1

CT

D

E

31

F5

L

Table 3

Summary of Contents for OptiFlow Professional GWH12 1 CTD E23

Page 1: ...CTD E23 31 F5 L 6 720 813 939 2016 05 AU Read installation manual prior to installation of this appliance Read user manual before putting this unit in operation Observe the warnings in the manuals The installation location must meet the requirements for sufficient ventilation Installation by an authorised person only ...

Page 2: ...f appliance 5 2 6 Accessory 5 2 7 Appliance layout 6 3 Operation instructions 7 3 1 Digital display description 7 3 2 Before first use of the appliance 7 3 3 Switching the appliance on off 7 3 4 Temperature control 7 3 5 Programming button 8 3 6 Draining the appliance 8 3 7 Error codes 8 3 8 Cleaning the front of the appliance 8 4 Maintenance only by authorised service technicians 8 5 Troubleshoot...

Page 3: ...years The installer is responsible for the safety and environmental compatibility of the installation The owner user is responsible for keeping the area around the water heater free from debris Safe access to inspect and service the water heater is the responsibility of the property owner Use only genuine Bosch spare parts Explosive and flammable material Do not store or use flammable material pap...

Page 4: ...ordance with EN 60335 1 in order to prevent hazards from occurring when using electrical appliances Thisappliancecanbeusedbychildrenof8yearsandolder as well as by people with reduced physical sensory or mental capabilities or lacking in experience and knowledge if they are supervised and have been given instruction in the safe use of the appliance and understand the resulting dangers Children must...

Page 5: ...Description of appliance Room sealed wall mounted appliance for internal installation Multifunctional display panel Suitable for Natural Gas or Universal LPG Electronic ignition Water flow sensor Water valve Temperaturesensorsformonitoringthetemperatureofthe incoming and outgoing water of the appliance Safety devices Flame sensor rod Thermal fuse Hot water temperature sensor Electronic control uni...

Page 6: ...rature sensor 7 Thermal fuse 8 Hot water temperature sensor 9 Hot water outlet 10 Power cord and plug 11 Combustion gas collector 12 Frost protection device 13 Ignition electrode 14 Burner pressure test point 15 Water flow sensor and Water valve 16 Electronic control unit 17 Cold water temperature sensor 18 Gas valve 19 Cold water inlet 20 Gas pressure test point 21 Gas inlet ...

Page 7: ...on valve of the installation 3 3 Switching the appliance on off Switching on the appliance Press the button The screen cover shows the selected water temperature Fig 3 Switching the appliance off Press the button 3 4 Temperature control Press thebuttons or untilyou reachthe desired temperature Fig 4 Open all the water and gas valves CAUTION Hot surface The front of the appliance may reach high tem...

Page 8: ... Some error codes may be solved by resetting the appliance Press the button for 3 seconds 3 8 Cleaning the front of the appliance Only clean the front of the appliance with a cloth and detergent with water 4 Maintenance onlybyauthorisedservice technicians To guarantee that the consumption of gas and the emission of exhaust gas are maintained at the best values we recommend that the appliance be in...

Page 9: ... an authorised service technician A9 Hot water outlet temperature sensor is not fitted properly Low incoming gas pressure Check temperature sensor and associated connections If the problem persists call an authorised service technician C7 Faulty fan Check if the fan is properly connected to ECU If the problem persists call an authorised service technician CA Water flow above maximum specified valu...

Page 10: ...nician EF Wrong gas connected Call an authorised service technician F7 A flame is detected although the appliance is switched off Unplug the electrical connection for 10 seconds Reconnect and restart the appliance If the problem persists call an authorised service technician F9 Safety solenoid valve disconnected Call an authorised service technician FA Fault in the gas control valve Call an author...

Page 11: ...iciency and environmental safety are all of equal importance to us and all environmental protection legislation and regulations are strictly observed We use the best possible technology and materials for protecting the environment taking into account of economic considerations Packaging We participate in the recycling programmes of the countries in which our products are sold to ensure optimum rec...

Page 12: ...qualitytable are considered acceptable and generally Australian and New Zealand suburban water supplies fall within these limits parameters In areas of Australia and New Zealand where water may be supplied either fully or partly from bores artesian wells or similar one or more of the important limits may well be exceeded and the heater could therefore be at risk of failure Where uncertainty exists...

Page 13: ... influences NOTE Any service call costs incurred by the owner or user of the hot water unit for any matter not covered by the terms of this warranty will not be reimbursed by Bosch even if those costs are incurred during the warranty period If the hot water unit is located outside the usual operating area of a Bosch service agent the agent s travel freight or similar costs are not coveredbythiswar...

Page 14: ...y questions about this warranty or to lodge a warranty claim please contact Robert Bosch Australia Pty Ltd 1555 Centre Road Clayton Victoria 3168 Tel Australia 1300 307 037 Tel New Zealand 0800 543 352 IMPORTANT NOTE FOR AUSTRALIAN CONSUMERS Our goods come with guarantees that cannot be excluded under the Australian Consumer Law You are entitled to a replacementorrefundforamajorfailureandforcompen...

Page 15: ...6 720 813 939 2016 05 OptiFlow Professional 15 Notes ...

Page 16: ...6720813939 ...

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