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6        Safety Information

 

Do not remove the front cover unless 

the power to the boiler is turned off 

or disconnected.

Failure to do so may result in electric 

shock.

 

When servicing the controls, label all 

wires prior to disconnecting them.

Failure to do so may result in wiring 

errors, which can lead to improper or 

dangerous operation.

 

Do not use unapproved replacement 

or accessory parts.

 

Doing so may result in improper or 

dangerous operation and will void the 

manufacturer’s warranty.

 

Do not place anything in or around 

the flue terminals, such as a clothes 

line, that could obstruct the air flow 

in or out of the boiler.

 

This boiler has been approved for 

use in the UK and Ireland only.

 

Using the boiler in any other country 

will void the manufacturer’s warranty.

 

Should overheating occur or the gas 

supply fail to shut off, turn off the 

manual gas valve to the appliance.

EC Conformity Declaration

0063

Navien, hereby declares that the boiler models:

NCB700-24L, NCB700-28L, NCB700-34L, NCB700-40L

to which this declaration refers, conform to and comply with 

the essential requirements of the following applicable European 

Standards and Directives.

Gas appliances

:  Regulation (EU) 2016/426 

Standards EN15502-1, EN15502-2-1 and EN437

Boiler Efficiency

:  Directive 92/42/EEC 

Regulation (EU) No.813/2013 

Standards EN15502-1, EN15502-2-1

Low voltage

:  Directives 73/23/EEC and 

93/68/EEC Standards EN 60335-1, EN 60335-2-30, 

EN 60335-2-51, EN 50165

Electro-magnetic Compatibility

:  Directive 2004/108/EC 

Standards EN 55014

Pressure Vessels

: Directive 97/23/EEC

Navien, manufactures its products using a Quality Assurance 

system in compliance with Standard EN-ISO 9001:2000.

Summary of Contents for NCB700-24L

Page 1: ...ice TAS first Contact the technician or professional who installed your boiler Contact a Gas Safe Registered engineer When contacting an official Technical Assistance Service TAS please have the follo...

Page 2: ...ion in these instructions is not followed exactly a fire or explosion may result causing property damage or personal injury Do not store or use petrol or other flammable vapours and liquids in the vic...

Page 3: ...he Boiler 7 2 3 Using the Front Panel 8 3 Operating the Boiler 10 3 1 Turning the Boiler On or Off 10 3 2 Adjusting the Temperature 10 3 3 Viewing Basic Information 11 3 4 Resetting the Boiler 12 4 Tr...

Page 4: ...dge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved Children shall not play with the appliance Cleaning and user ma...

Page 5: ...result in fire or explosion Do not place combustibles such as newspapers or laundry near the boiler or flue system Doing so may result in a fire DANGER HOT BURN To prevent burns Use the lowest operat...

Page 6: ...ything other than its intended purpose as described in this manual Do not place or use hair sprays spray paints or any other compressed gases near the boiler or flue system including the flue terminat...

Page 7: ...ill void the manufacturer s warranty Should overheating occur or the gas supply fail to shut off turn off the manual gas valve to the appliance EC Conformity Declaration 0063 Navien hereby declares th...

Page 8: ...initiates a safety heating cycle to prevent internal equipment damage due to freezing temperatures Short Circuit Protection Any short circuit occurring in the boiler s electrical circuit immediately...

Page 9: ...amming mode Displayed when the boiler s schedule programming operation is set f DHW preheat Displayed when the DHW preheat feature is enabled DHW preheat Always ON DHW Intelligent g Central heating de...

Page 10: ...ting and DHW supply temperatures Refer to the following table for detailed information a b c d e f a Menu button Access to the Main menu screen b Back button Access to the previous screen c OK button...

Page 11: ...l heating temperature cannot be adjusted when the Heat Demand function is set to OpenTherm 3 2 2 Adjusting the DHWTemperature WARNING Before adjusting the water temperature carefully read To prevent b...

Page 12: ...Calculation will be displayed 11 Water Press Water pressure bar 12 Flame Value Flame detector AD value Flame On 8bit AD values equal to or lower than 70 Flame Off 8bit AD values equal to or higher tha...

Page 13: ...Gas Fuel type NG LPG 23 Main F W ver Main firmware version 24 Panel F W Ver Controller panel firmware version Note The fan moter controls the APS so the fan target speed Fan Target RPM is only for yo...

Page 14: ...enough draw at least 1 9 litres of water per minute LPM through the boiler Is an error code displayed on the front panel If an error code is displayed refer to 4 2 Understanding Error Codes on page 1...

Page 15: ...mistor open or short circuit Alarm Water Supply E302 Low water pressure Auto E352 High water pressure Auto E353 Abnormal operation Water pressure sensor Auto DHW Circulation E407 DHW Outlet thermistor...

Page 16: ...bly qualified engineer has installed the system in accordance with Navien instructions Failures due to misuses or incorrect installation use of non suitable power or fuel supply with water with physic...

Page 17: ...gy efficiency class A A A A Rated heat output kW 20 23 28 33 Central heating annual energy consumption GJ 37 43 52 57 Water heating annual electricity consumption kWh 66 65 45 46 Water heating annual...

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