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Safety Information        5

CAUTION

 

Do not attempt to repair or replace 

any part of the boiler, unless it is 

specifically recommended in this 

manual. 

For all other service, contact an 

authorised technician or licensed 

professional. Improper adjustments, 

alterations, service, or maintenance 

may lead to property damage or 

personal injury, and will void your 

warranty.

 

Do not operate the boiler if you feel 

something is wrong with it.

 

Doing so may result in product damage 

or personal injury.

 

Do not allow children to operate or 

access the boiler.

 

Doing so may result in product damage 

or personal injury.

 

Do not attempt to change the DHW 

water temperature while the boiler is 

being used.

 

Doing so may result in personal injury.

 

Do not turn on the boiler unless 

the water and gas supplies are fully 

opened.

 

Doing so may damage the boiler.

 

Do not turn on the water if the cold 

water supply shut-off valve is closed.

 

Doing so may damage the boiler.

 

Do not use this boiler for anything 

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 termination.

Doing so may result in fire or explosion.

 

Do not operate the boiler with the 

front cover opened.

 

Doing so may result in fire or carbon 

monoxide (CO) poisoning, which may 

result in property damage or personal 

injury.

 

Do not operate this boiler without 

proper flue system.

 

Doing so may result in fire or carbon 

monoxide (CO) poisoning, which may 

result in property damage or personal 

injury. Inspect the flue termination and 

air intake supply annually to ensure 

proper operation of the boiler. Turn 

off and discontinue use of the boiler 

if any of the flue pipes, flue elbows, or 

intake pipes are damaged in any way, 

separated at a joint, or show evidence 

of corrosion, rusting, or melting.

 

Do not touch the power cord or 

internal components of the boiler 

with wet hands.

Doing so may result in electric shock.

 

Do not make any electrical 

connections before turning off the 

electrical power supply at service 

entrance panel.

Doing so may result in severe personal 

injury.

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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