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4        Safety Information

Water 

Temperature

Time in which a young child can suffer 

a full thickness (3rd degree) burn

70°C

Less than 1 second

60°C

1 second

55°C

10 seconds

49°C

10 minutes

37°C

Very low scald risk

WARNING

 

Shut off the gas supply if the boiler is 

damaged.

Have your installer or plumber show 

you the location of the gas shut off 

valve and demonstrate how to close 

the valve. If the boiler is damaged as a 

result of overheating, fire, flood, or any 

other reason, close the manual shut 

off valve and do not operate the boiler 

again until it has been inspected by a 

qualified technician.

 

Do not store or use petrol or other 

flammable liquids near this boiler.

Doing so may 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 operating temperature 

setting necessary to provide 

comfortably hot water.

 

If your household has children or 

elderly or disabled residents, consider 

using a lower temperature setting.

 

Read all the instructions in this 

manual carefully before changing the 

temperature setting.

 

Feel the water before using it on 

children, the elderly, or the disabled.

DANGER

This boiler’s water temperature is set to 

49°C at the factory for your safety and 

comfort. Increasing the temperature 

increases the risk of accidental scalding. 

Water temperatures at or above 52°C 

can cause instant scalding or severe 

burns. Before you decide to change the 

temperature setting, read the following 

charts carefully.

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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