Navien NCB-24LDWE, NCB-28LDWE, NCB-40LDWE, NCB-34LDWE User Manual
User’s
Information
Manual
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These appliances are for use with natural gas or LPG.
(An LPG conversion kit is included with the boiler.)
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Type: B23-B33-B53-C13-C33-C43-C53-C63-C83
Gas Model GC Number
Natural Gas
NCB-24LDWE
NCB-28LDWE
NCB-34LDWE
NCB-40LDWE
47-709-01
47-709-02
47-709-03
47-709-04
LPG
NCB-24LDWE
NCB-28LDWE
NCB-34LDWE
NCB-40LDWE
47-709-05
47-709-06
47-709-07
47-709-08
Keep this manual near this boiler for future reference
whenever maintenance or service is required.
Condensing Combi Boiler
WARNING
If the information in these instructions is not followed exactly, a fire or explosion
may result, causing property damage or personal injury.
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Do not store or use petrol or other flammable vapours and liquids in the vicinity of this or
any other appliance.
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WHAT TO DO IF YOU SMELL GAS
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Do not try to light any appliances.
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Do not touch any electrical switch; do not use any phone in your building.
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Immediately call the National Gas Emergency Helpline on (Freephone) 0800 111999 or your gas
supplier from a neighbour’s phone. Follow the instructions received.
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Installation and service must be performed by a Gas Safe registered installer, service
agency or the gas supplier.
2 Contents
Contents
1. Safety Information 3
2. About the Boiler 7
2.1 Description of the Boiler 7
2.2 Parts of the Boiler 7
2.3 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 Setting Summer and Winter Mode 12
3.5 Resetting the Boiler 12
3.6 Setting the Front Panel Lock Mode 13
4. Troubleshooting 14
4.1 Solving Basic Problems 14
4.2 Understanding Error Codes 15
Warranty 16
ErP Information 17
Safety Information 3
B. BEFORE OPERATING smell all around
the appliance area for gas. Be sure to
smell next to the floor because some
gases are heavier than air and will
settle on the floor.
WHAT TO DO IF YOU SMELL GAS
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Do not try to light any appliances.
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Do not touch any electric switch; do
not use any phone in your building.
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Immediately call the National Gas
Emergency Helpline on (Freephone)
0800 111999 or your gas supplier
from a neighbour’s phone. Follow
the instructions received.
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Do not return to your home until
advised to do so.
C. Do not use this appliance if any part
has been under water. Immediately
call a qualified service technician to
inspect the appliance and to replace
any part of the control system and
any gas control which has been under
water.
WARNING
This appliance can be used by children
aged from 8 years and above and
persons with reduced physical, sensory
or mental capabilities or lack of
experience and knowledge 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
maintenance shall not be made by
children without supervision.
The following safety symbols are used in this manual. Read and
follow all safety instructions in this manual precisely to avoid
unsafe operating conditions, fire, explosion, property damage or
personal injury. Keep this manual for future reference.
DANGER
Indicates an imminently hazardous
situation which, if not avoided, could
result in severe injury or death.
WARNING
Indicates a potentially hazardous
situation which, if not avoided, may
result in injury or death.
CAUTION
Indicates a potentially hazardous
situation which, if not avoided, could
result in property damage.
WARNING
If you do not follow these instructions
exactly, a fire or explosion may result
causing property damage or personal
injury.
A. This appliance does not have a pilot.
It is equipped with an ignition device
which automatically lights the burner.
Do not try to light the burner by hand.
1. Safety Information
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
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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.
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Do not store or use petrol or other
flammable liquids near this boiler.
Doing so may result in fire or explosion.
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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:
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Use the lowest operating temperature
setting necessary to provide
comfortably hot water.
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If your household has children or
elderly or disabled residents, consider
using a lower temperature setting.
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Read all the instructions in this
manual carefully before changing the
temperature setting.
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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.
Safety Information 5
CAUTION
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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.
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Do not operate the boiler if you feel
something is wrong with it.
Doing so may result in product damage
or personal injury.
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Do not allow children to operate or
access the boiler.
Doing so may result in product damage
or personal injury.
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Do not attempt to change the DHW
water temperature while the boiler is
being used.
Doing so may result in personal injury.
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Do not turn on the boiler unless
the water and gas supplies are fully
opened.
Doing so may damage the boiler.
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Do not turn on the water if the cold
water supply shut-off valve is closed.
Doing so may damage the boiler.
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Do not use this boiler for anything
other than its intended purpose, as
described in this manual.
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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.
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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.
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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.
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Do not touch the power cord or
internal components of the boiler
with wet hands.
Doing so may result in electric shock.
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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.
6 Safety Information
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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.
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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.
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Do not use unapproved replacement
or accessory parts.
Doing so may result in improper or
dangerous operation and will void the
manufacturer’s warranty.
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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.
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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.
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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:
NCB-24LDWE, NCB-28LDWE, NCB-34LDWE, NCB-40LDWE
to which this declaration refers, conform to and comply with
the essential requirements of the following applicable European
Standards and Directives.
Gas appliances: Directive 2009/142/EC Standards EN 437 and
EN 15502
Boiler Eciency: Directives 92/42/EEC and
93/68/EEC
Regulation (EN) No. 813/2013
Standards EN 15502
Low voltage: Directives 73/23/EEC and
93/68/EEC Standard 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.
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