Navien NCB700-2S Plus 42K User manual

●These appliances are for use with natural gas or LPG.
(An LPG conversion kit is included with the boiler.)
●Type: B23-C13-C33-C53
Gas Model
Natural Gas NCB700-2S+/42K
NCB700-3S/54K
LPG NCB700-2S+/42K
NCB700-3S/54K
Keep this manual near this boiler for future reference
whenever maintenance or service is required.
Installation
& Operation
Manual
WARNING
If the information 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 vicinity of this or any
other appliance.
– WHAT TO DO IF YOU SMELL GAS
●Do not try to light any appliances.
●Do not touch any electrical switch; do not use any phone in your building.
●Immediately call the National Gas Emergency Helpline on (Freephone) 0800 111999 or your gas
supplier from a neighbour’s phone. Follow the instructions received.
– Installation and service must be performed by a Gas Safe registered installer, service agency or
the gas supplier.
Condensing Combi Boiler

2 Contents
Contents
1. Safety Information 3
2. About the Boiler 8
2.1 Items Included 8
2.2 Accessories 8
2.3 Technical Data 9
2.4 Components 12
2.5 Dimensions 16
2.6 Operating Modes 17
2.7 Installation Procedure 19
2.8 About the NaviCirc 20
3. Installing the Boiler 22
3.1 Choosing an Installation Location 22
3.2 Mounting the Boiler to the Wall 24
4. Installing the System Piping 25
4.1 Installing a Central Heating System 25
4.2 Installing a Domestic Hot Water (DHW) System 26
4.3 Installation Diagrams for the NaviCirc 27
4.4 Installing the NaviCirc 30
4.5 Connecting the Condensate Drain Line 37
4.6 Pipe Dimensions and Water Pressure 41
4.7 Pressure Relief Valve 41
4.8 Filling the System 41
4.9 Testing the Water System 42
5. Connecting the Gas Supply 43
5.1 Gas Pipe Material 44
5.2 Propane Gas Installations (LPG) 44
5.3 Measuring the Inlet Gas Pressure 44
6. Flue System 46
6.1 Flue Terminal Positions 46
6.2 Flue Installation 50
6.3 Measuring Flue Length 53
6.4 Terminating the Flue 53
7. Setting the DIP Switches 54
7.1 PCB DIP Switches 54
7.2 Front Panel DIP Switches 54
8. Connecting Electrical Supplies 55
8.1 Accessing the Terminal Strips 55
8.2 Connecting the Power Supply Cables 56
8.3 Connecting the Switched Live (230 V) 57
8.4 Connecting the Room Stat or OpenTherm 57
8.5 Connecting the Outdoor Temperature Sensor 57
8.6 OpenTherm® Protocol 57
8.7 Connecting the Navien Smart Room Controller
(Optional) 58
9. Installation Check list 59
10. Operating the Boiler 60
10.1 Using the Front Panel 60
10.2 Turning the Boiler On or Off 62
10.3 Start-Up Wizard 62
10.4 Adjusting the Temperature 62
10.5 Resetting the Boiler 63
10.6 Accessing Basic Menu Items 64
10.7 Accessing Advanced Menu Items 69
10.8 Error Codes 74
11. Maintaining the Boiler 75
11.1 Cleaning the Boiler 75
11.2 Draining the Boiler 75
11.3 Cleaning the Return Adapter Filter 76
11.4 Protecting the Boiler from Freezing 76
11.5 Routine Servicing 77
12. Appendices 85
12.1 Gas Conversion 85
12.2 Wiring Diagram 90
12.3 Ladder Diagram 91
12.4 Outdoor Temperature Sensor (Optional) 92

Safety Information 3
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.
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, could
result in injury or death.
CAUTION
Indicates a potentially hazardous
situation which, if not avoided, could
result in property damage.
DANGER
If you smell gas:
●Do not try to light any appliances.
●Do not touch any electrical switches or
use landline phones.
●From a neighbour’s phone, call
your gas provider and follow their
instructions.
●If you cannot reach your gas provider,
call the fire department.
●Do not return to your home until
authorised by your gas supplier or the
fire department.
Do not use or store flammable
products, such as petrol, solvents, or
adhesives in the same room or area as
the boiler.
●The boiler has a main burner flame that
can turn on at any time and can ignite
flammable vapours. Vapours from
flammable liquids can explode and
catch fire, causing severe burns.
●Vapours cannot be seen and are
heavier than air. They can travel long
distances along the ground and can be
carried from other rooms to the boiler’s
main burner flame by air current.
●Keep all flammable products far
away from the boiler and store them
in approved containers. Keep the
containers closed tightly and out of the
reach of children and pets.
1. Safety Information

4 Safety Information
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.
WARNING
●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.
●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.
●Do not touch the power cord or
internal components of the boiler
with wet hands.
Doing so may result in electric shock.

Safety Information 5
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
50°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.
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
CAUTION
●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 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. Verify proper
operation after servicing.
●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 the UK and Ireland only.
Using the boiler in any other country
will void the manufacturer’s warranty.

6 Safety Information
General Installation Guidelines
Navien ensures that this product contains no harmful
substances and that no harmful materials have been used in its
manufacture.
Current legislation must be taken into account on installing
this appliance, and it must be installed in a place with suitable
ventilation.
The boiler must be installed by an installer authorised by the
Ministry of Industry and it must be started up by an Official
Technical Assistance Service authorised by Navien.
The requirements included in the following regulations must be
observed on installing the boiler:
-The Gas Installation Regulation.
-The Technical Building Code.
-The Regulation for Heating Installations in Building.
-The Low Voltage Regulation.
Installation in hard water areas
●In areas with hard water (hardness exceeding 200 ppm), it is
important to install a scale reducer.
The advice of the local water authority should be sought.
Installing the system piping
●The boiler is equipped with an internal relief valve. All systems
must be capable of sustaining pressure of up to 3 bar.
●The air vent is required in the system during filling.
CAUTION
The boiler is equipped with an internal
bypass valve. The internal bypass valve
is not intended to replace an external
bypass valve. An external automatic
bypass valve is required if a zone valve
has been connected to the system.
Gas Conversion
The boiler is configured for natural gas. If LPG conversion is
required, use the conversion kit supplied with the boiler and
attach the item matching the LPG GC No. (included in the kit).
The Codes of good practice and regulations refer to the
latest versions of the same.
The installation must also comply with the following European
Standards:
Standard Description
UNE-EN 13831:2008 Closed expansion vessels with
diaphragm.
UNE-EN 1856 Metal chimneys
UNE-EN 13384 Chimneys
UNE-EN 13779 Ventilation
UNE-EN ISO 16484 Building control systems.
UNE-EN 14336 Heating systems in buildings.
UNE-EN 15502-1 Gas-fired heating boilers
Part 1: General Requirements and tests
UNE-EN 15502-2-1
Gas-fired heating boilers
Part 2-1: Specific standard for type
C appliances and type B2, B3 and B5
appliances of a nominal heat input not
exceeding 1000 kW
UNE-EN 13203:2007 Domestic Hot Water
UNE-EN 303-7:2008 Heating boilers.

Safety Information 7
The Benchmark Scheme
Benchmark places responsibilities on both manufacturers
and installers. The purpose is to ensure that customers are
provided with the correct equipment for their needs, that it is
installed, commissioned and serviced in accordance with the
manufacturer’s instructions by competent persons and that it
meets the requirements of the appropriate Building Regulations.
The Benchmark Checklist can be used to demonstrate
compliance with Building Regulations and should be provided
to the customer for future reference.
Installers are required to carry out installation, commissioning
and servicing work in accordance with the Benchmark Code
of Practice which is available from the Heating and Hotwater
Industry Council who manage and promote the Scheme.
Visit www.centralheating.co.uk for more information.
Disposal of the Product
This product should be handed in at a designated collection
point, e.g. by handing it in at a duly authorised reseller when
purchasing a similar product, or at an authorised collection site
for recycling products which contains electrical and electronic
equipment (EEE) and batteries and accumulators. Because of the
potentially hazardous substances that usually accompany EEE,
improper handling of this type of waste could have a possible
impact on the environment and human health.
Your cooperation in the proper disposal of this product will
contribute to the effective usage of natural resources.
For more information on recycling this product, please contact
your city office, local waste disposal facilities, official service for
chemical waste or landfill site.
UKCA/EC Conformity Declaration
0086 2797
Navien, hereby declares that the boiler models:
NCB700-2S+/42K, NCB700-3S/54K
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: Directive 2014/35/EU and EN 60335-1,
60335-2-102
Electro-magnetic Compatibility: Directive 2014/30/EU
Standards EN 55014
Pressure Vessels: Directive 2014/68/EU
Navien, manufactures its products using a Quality Assurance
system in compliance with Standard EN-ISO 9001:2015.

8 About the Boiler
2.1 Items Included
When you open the box, you will find the following items with the boiler. Check the box for each of the following items before installing
the boiler. If it seems like there is a problem, do not use the boiler. Contact your supplier. Keep the included items out of the reach of
children, as they can be dangerous. When you no longer wish to use the boiler, disable any parts that could be potentially hazardous.
Installation & Operation
Manual, User’s Information
Manual
Boiler mounting template ErP Label Wall mounting bracket
Tapping screws & anchors Propane gas changing kit Electric cord Condensate trap hose
Pre-plumbing Kit & Navifill Link NaviCirc DHW expansion vessel
2.2 Accessories
The following optional accessories are available for the boiler:
Smart Room Controller
(Smart Plus) Pipe Cover Stand off KIT
2. About the Boiler

About the Boiler 9
2.3 Technical Data
The following table lists the general specifications for the boiler.
Specifications Unit NCB700-2S+/42K NCB700-3S/54K
Heat input range kW 35.0/3.5 35.0/3.5
DHW heat input range kW 40.6/3.5 52.0/3.5
Heat output range @ 80/60°C kW 34.0/3.4 34.0/3.4
DHW output range kW 42.0/3.5 54.0/3.5
Condensing heat output range @ 50/30°C kW 37.1 37.1
Full load efficiency at Max./Min. output @ 80/60°C %98.5 98.6
Full load efficiency at Max./Min. output @ 50/30°C
(condensing) %107.1 106.9
Partial load (30%) efficiency with 30°C return temp. %109.7 109.4
Seasonal efficiency rate (SEDBUK 2009) -93.61 93.51
NOx Classification -Class 6
Category -ll2HY203P
Type -Heating and instantaneous hot water production
Heat output adjustment -Adjustable over entire Max./Min. output range
Type of heating installation -Close circuit
Max. heating operation pressure bar 2.5
Max. heating temperature °C 90
Adjustable heating temperature range °C 40-90*
Expansion vessel volume L10
Expansion vessel pre-charged pressure bar 1
Min. DHW working pressure bar 0.5
Min. DHW working flow L/Min 2.0
Max. DHW working pressure bar 10.0
Adjustable DHW temperature range °C 30-65
DHW flow rate @ 25°C temp. rise. L/Min 24.1 31.0
DHW flow rate @ 35°C temp. rise. L/Min 17.2 22.1
DHW flow rate for kitchen @ 45°C temp. rise. L/Min 13.4 17.2
Gas rate (G20) Qmax m
3
/h 3.77 4.83
Gas rate (G20) Qmin m
3
/h 0.33 0.33
Electrical power supply -230V / 50Hz
Nominal current A0.6 0.7
Max. power consumption W130 150
Appliance protection rating -IPX4D
Boiler mounting system type -Wall-mounted
Flue exhaust/Air intake system types -B23, C13, C33, C53

10 About the Boiler
Specifications Unit NCB700-2S+/42K NCB700-3S/54K
Flue exhaust/Air intake system diameters mm Coaxial Ø60/100 and Ø80/125
Max. gas pipe pressure drop Pa 294 294
Max. horizontal coaxial length Ø60/100 m20
Max. vertical coaxial length Ø60/100 m21
Equivalent elbow length @ 90° Ø60/100 m2.4
Equivalent elbow length @ 45° Ø60/100 m1.2
Max. horizontal coaxial length Ø80/125 m68
Max. vertical coaxial length Ø80/125 m70
Equivalent elbow length @ 90° Ø80/125 m2.4
Equivalent elbow length @ 45° Ø80/125 m1.2
Equivalent length of adapter Ø60/100 => Ø80/125 m0.5
Hydraulic connection diameter
mm 22
mm 15
mm 22
Dimensions (Width x Depth x Height) mm 440x353x695
Total boiler weight (lift weight) kg 39 42
*The factory default is 85°C. To adjust set temperature, refer to“2. Supply MAX Set-point”in“10.7.3 Setting the Operation Parameters”on page 70.

About the Boiler 11
The following table lists the product information requirements (EU regulation No 811/2013 and No 813/2013)
KD Navien Symbol Unit NCB700-2S+/42K NCB700-3S/54K
Condensing boiler YES YES
Low-temperature (**) boiler NO NO
B1 boiler NO NO
Cogeneration space heater NO NO
Combination heater YES YES
Rated heat output P
rated
kW 34.7 34.4
Seasonal space heating energy efficiency η
s
%94 94
Useful heat output
At rated heat output
and high-temperature regime (*) P
4
kW 34.4 34.7
At 30 % of rated heat output
and low-temperature regime (**) P
1
kW 11.3 11.8
Useful efficiency
At rated heat output
and high-temperature regime (*) η
4
%88.7 88.8
At 30 % of rated heat output
and low-temperature regime (**) η
1
%98.8 98.5
Auxiliary electricity consumption
At full load elmax kW 0.051 0.043
At part load elmin kW 0.025 0.020
In standby mode P
SB
kW 0.003 0.003
Other items
Standby heat loss P
stby
kW 0.089 0.080
Ignition burner power consumption P
ign
kW 28 26
Annual energy consumption Q
HE
GJ 70.3 71.6
Sound power level, indoors L
WA
dB 51 51
Emissions of nitrogen oxides NO
x
mg/kWh 22.9 24
For combination heaters
Declared load profile XXL XXL
Daily electricity consumption Q
elec
kWh 0.2 0.2
Annual electricity consumption AEC kWh 44 44
Water heating energy efficiency η
wh
%85.8 85.7
Daily fuel consumption Q
fuel
kWh 28.1 28.1
Annual fuel consumption AFC GJ 22 22
Contact details Navien LTD, Building 2, Guildford Business Park, Guildford, GU2 8XH
(*) High-temperature regime means 60 °C return temperature at heater inlet and 80 °C feed temperature at heater outlet.
(**) Low temperature means for condensing boilers 30 °C, for low-temperature boilers 37 °C and for other heaters 50 °C return temperature (at heater inlet).
Specific precautions
Read the user’s information and installation manual before the application is assembled, installed or maintained.

12 About the Boiler
2.4 Components
The following diagram shows the key components of the boiler. Component assembly diagrams and particular parts lists are included in
the Appendices.
Fan & Motor
Front Panel
Flue Duct
Ignitor & Flame Rod
Circulation Pump
Condensate Trap
PCB
NCB700-2S+/42K

About the Boiler 13
NCB700-2S+/42K
Dual Venturi
Mixing Chamber
Expansion Vessel
Primary Heat Exchanger
Secondary Heat Exchanger
Return Adapter
Filter Assembly
3-Way Valve
Central Heating Return
Pressure Relief Valve
Central Heating Supply
DHW Inlet
DHW Outlet
Gas Valve

14 About the Boiler
NCB700-3S/54K
Fan & Motor
Front Panel
Flue Duct
Ignitor & Flame Rod
Circulation Pump
Condensate Trap
PCB

About the Boiler 15
NCB700-3S/54K
Dual Venturi
Mixing Chamber
Expansion Vessel
Primary Heat Exchanger
Secondary Heat Exchanger
Return Adapter
Filter Assembly
Gas Valve
Central Heating Return
Pressure Relief Valve
Central Heating Supply
DHW Inlet
DHW Outlet
3-Way Valve

16 About the Boiler
2.5 Dimensions
The following diagrams show the dimensions of the boiler and the table lists the supply connections.
695 mm
440 mm
Supply Connections
Description Diameter
A Flue exhaust/Air intake Ø60/100,
Ø80/125
B Central heating supply 22 mm
C Hot water outlet (DHW) 15 mm
D Gas supply inlet22 mm
E Cold water inlet (DHW) 15 mm
F Central heating return 22 mm
Overhead View
119mm
220 mm
A
Bottom View
122 mm 82 mm
166 mm
101 mm 60 mm
104 mm63 mm78 mm70 mm
E
BC D F
353 mm

About the Boiler 17
Air InAir In
Exhaust
Gas
Blow Fan Ignitor
Gas
Valve
Gas
Inlet
Flow
Out
CH
Return
Three
-way
Valve
DHW Heat
Exchanger
Circulation
Pump
Heat
Exchanger
2.6.2 Operating According to Outdoor
Temperature Conditions
The Outdoor Reset Control feature may be used to enhance
energy efficiency while maintaining optimal heating
performance. With the Outdoor Reset Control, the central
heating temperature setting automatically changes according to
the outdoor temperature and the K-Factor setting.
You can configure the Outdoor Reset Control settings on the
front panel in the Central Htg Operation menu. Refer to“10.6.2
Setting the Central Heating Operation”on page 65.
Note The Outdoor Reset Control feature requires
installation of an outdoor temperature sensor, and it
only works when the boiler is running in the normal
operation mode. It does not work when the boiler’s
front panel displays a fault.
2.6 Operating Modes
2.6.1 Operating in Central Heating Mode
To operate the central heating mode:
1. Press the Menu button ( ) to access the Main menu and
select “2. Central Htg Operation”by pressing the OK button
().
2. In the Central Htg Operation menu, select“1. Central Htg
ON/OFF”and select “Enable”. Then, select “1-1 CH Set Temp”
and select a heating temperature setpoint higher than
current heating temperature.
●When the boiler detects a request for heating production
(from the installation’s room thermostat, for example), the
3-way valve goes to heating position and the circulating
pump starts up.
●If the boiler water temperature is lower than the desired
temperature setpoint, the boiler ignites and heats up the
heating installation until the selected boiler temperature
is reached. The boiler’s electronic control modulates
the burner output to adapt to the installation’s heat
requirements at all times and so that the installation’s
water temperature remains constant. This prevents the
installation from overheating and reduces heat loss as
much as possible.
●When there is no further heating demand (e.g. when
the desired ambient temperature selected on the room
thermostat is reached), the burner is extinguished (if it was
ignited) and the circulation pump continues to run during
the post-circulation time (minimum 3 minutes), to protect
the boiler from overheating due to thermal inertia in the
installation.

18 About the Boiler
●When there is no further DHW demand, the burner
switches off and the 3-way valve remains in DHW mode
position during a wait time (5 minutes by default), so that
it can work more efficiently and provide more flexibility if
the taps are continuously turned on and off.
●When the wait time has elapsed, the 3-way valve returns
to the Heating mode position and the boiler is ready to
provide heating.
Note ●DHW priority: Whenever a hot water tap is turned
on in the home, the boiler begins to run in DHW
mode and the heating function is deactivated until
all the taps are turned off again.
●If the boiler water pressure drops below 0.4 bar,
refer to“4.8 Filling the System”on page 41 to fill
the boiler system.
Exhaust
Gas
Blow Fan
Air InAir In
Ignitor
Gas
Valve
Gas
Inlet
DHW Out
Cold
Water In
Three
-way
Valve
DHW Heat
Exchanger
Circulation
Pump
Heat Exchanger
The following table lists the central heating temperature
range by k-factor setting value and the applicable outdoor
temperature range.
20 15 10 5 0 -10 -15 -20 -25
-5
20
30
40
50
60
50
70
80
90 4 3.5 3 2.5 2
1.5
1.2
0.6
1
0.2
Outdoor Temperature (ºC)
Outdoor Temperature Compensation
Heating flow temperature (ºC)
Note To connect the outdoor temperature sensor to the
boiler, carefully follow the connection instructions
provided in the“12.4 Outdoor Temperature Sensor
(Optional)”on page 92.
2.6.3 Operating in DHW Mode
To operate the DHW mode:
1. Press the Menu button ( ) to access the Main menu and
select “3. DHW Operation” by pressing the OK button ( ).
2. In the DHW Operation menu, select“1. DHW Set Temp”and
select a DHW temperature setpoint higher than current
DHW temperature.
●When a hot water tap is turned on in the home, the boiler
flow meter detects DHW demand, the 3-way valve goes
to DHW mode and the circulation pump starts up, which
makes the water in the boiler primary circuit flow through
the DHW heat exchanger, producing instant hot water.
●The electronic control modulates the burner output in
order to constantly produce hot water at the temperature
required.

About the Boiler 19
2.7 Installation Procedure
The flow diagram below provides a step-by-step description of the recommended procedure for clear, easy installation of the NCB700
boiler in its final location. A detailed description is given of the procedure in the sequenced sections below:
Wall-mounting
»
Gas connection
»
Electrical connections
»
Final check
»
Water and condensate
pipe connection
»
Flue gases exhaustion
system installation
(if necessary)
»
Gas changeover
(if necessary)
»
Boiler operation
»
p. 22
p. 25
p. 43
p. 55
p. 59 p. 60
p. 46
p. 85

20 About the Boiler
2.8 About the NaviCirc
The NaviCirc is a circulation device for standard domestic hot water pipes with a recirculation system. It allows domestic hot water pipes
and secondary return pipe to connect to the NaviCirc and preheat hot water pipes by circulating hot water through the NaviCirc. This
prevents hot water loss and heating time loss.
To minimise the energy consumed while preheating the water, the NaviCirc includes a feature that automatically blocks circulation when
the water reaches a temperature of approximately 35°C.
2.8.1 Included Items
When you open the box, you will find the following items with the NaviCirc. Check the box for each of the following items before
installing the NaviCirc.
NaviCirc
(Recirculation valve) Bracket Double-sided tape and primer Screws (M4 x 20L)
½”Stainless Cap including a washer ½”500 mm Flexible hoses
(with a spare one)
15 mm X ½”Straight Adaptor
(with a spare one) Anchors and Screws
Pressure relief valve
(10 bar)
Installation and Operation
Manual
DHW expansion vessel
(included with the boiler’s
package)