Installation, Maintenance and User Guide

Instruction Manual

Instruction Manual

Read the instructions fully before installing or using the appliance.INSTALLER, this manual is to be a�xed adjacent to the boiler.CONSUMER, retain this manual for future reference purposes.Constant development e�orts may result in minor deviations inillustrations, functional steps and technical data without prior notice.Pictures and drawings in the instructions can be di�erent from theappliance. All product images are provided by the manufacturer and arefor reference purposes only.

NHC 25B/30B/41B (Boiler House w/ Combi Option)NHC 25E/30E/41E (External w/ Combi Option)NHC 25H/30H/41H (Boiler House w/ Heat Only)NHC 25EH/30EH/41EH (External w/ Heat Only)

Contents

Homeowner 4567891011

12131418 20222324263031363742434445

Safety instructions Product Fiche Operation & Display Panel (OBC100) Room Thermostat (LCR-2WE) - Combi Only Vacation/Standby Mode - Combi only Heating Mode - Combi only Hot water Mode - Combi only Fault Codes

InstallerDesign Standards Safety Flue Regulations Before Using The Boiler How To Use Safety Devices Everyday Checks Servicing The Boiler Plumbing Schematic Commissioning The Boiler Component Overview Electric Wiring Diagram Wiring - Installation Variations OTC Mode Troubleshooting Fault Codes Product InformationSpare Parts SpecificationsWarranty

46

4950

4

Safety Instructions

Safety-related messages and instructions have been provided in this manual and on the boiler to warn you and others of a potential injury hazard. Read and follow all safety messages and instructions throughout this manual.It is very important to understand this safety section for operating, installing and servicing of the boiler.

In addition to this, under the Consumer Protection Act 1987 and Section 6 of the Health & Safety Act 1974, we are required to provide information on substances hazardous to health.

The small quantities of adhesives and sealants used in the product are cured. They present no known hazards when used in the manner for which they are intended.

This is a safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death.

Indicates an imminently hazardous situation whichif not avoided, could result in severe injury or death.

Indicates a potentially hazardous situation which, if not avoided, could result in severe injury or death.

Indicates an imminently hazardous situation which,if not avoided, could result in minor moderate injury.

Earth

Use of fire forbidden

Dangerous electric current

Product Fiche

5

KD Navien Unit NHC 25B NHC 30B NHC 41B

Space heating : temperature application Medium Medium Medium

XL XL XXL

A A A

B B B

Rated heat output kW 24.0 27.9 36.8

Space heating : annual energy consumption kWh 76 89 116

Water heating : annual electricity consumption(Combi only) kWh 94 93 105

Water heating : annual fuel consumption(Combi only) GJ 22 23 30

% 91 90 91

% 64 62 67

Sound power level dB 68 66 69

Read the user's information and installation manual before the application is assembled, installed or maintained.

LCD indicate the temp of heating water, the value of K-Factor, and occurrence of trouble displayed the failure code.

* See page 11 for Error Code Table

LCR-2WE Programmer- Combi only

The LCR-2WE remote control panel willactivate by pushing the power on/off button.

6

Operation and display panel (OBC100)

7

Hot water Temperature (Lo/Mid/Hi)

StandbyMode

Heating Mode

Hot waterMode

Temperature OperationIndicator

Indicating eachfunction and status

LCD Display

Room ThermostatPower ON/OFF

PowerHeating Mode

HeatingAdjusting Temp.

Up/Down

Standby Setting Mode

Standby ModeHot Water Mode

Hot Water

Operation/Service

LED Lamp

Room Thermostat (LCR-2WE) - Combi only

LCD

If you are not at home, you can set the Standby Mode to save heatingenergy by pressing.

To cancel vacation/standby mode press thebutton to return to the heating mode.

will be displayed and Standby Modewill be set.

Press button.

8

Vacation/Standby Mode - Combi only

blinks when selectingBoiler Temp. Mode

when blinks, set the desiredboiler temp. between 40~80 C̊ byadjusting / button, after a while,it is automatically saved. Boilertemp. can be set by 1˚C. After therequired temperature has beenselected, is on and currentboiler water temp. is displayed.

Set the heating temp.with / button.

Press the button.

The LCR-2WE room thermostat is designed to control a heating system according to time and temperature, in connection with a valve controller (red colored cable).

9

Heating mode - Combi only

will be displayed andHot Water Mode will be set.

Adjusting hot water temp. by 3step; Low load, Medium load, High load capacity of combustion.

Set the heating temp.with / button.

Use this function only when hot water is needed.

1. Please be careful that infants and young children do not usehot water without a guardian present.

2. While others are using hot water, do not change the hot water temp. setting for safety.

CAUTION

Press button.

You can determine whether the changeover from DHW mode to Heating mode by pushing “ " button.

10

Hot Water Mode - Combi only

Fault at the boiler

Fault codes take priority over all other display functions in the event of a system fault occurring and the LCD shows one of the following numeric error codes.

If multiple faults occur, the corresponding fault codes are displayed alternately for about two seconds each.

To reset the boiler switch the power button on -> off -> on.

If problem persists, contact your local installer.

02

03

04

05

06

12

16

Low water level

Temp. sensor wire disconnected

Short circuit of Temp. sensor

High limit thermostat

Error Code Cause

Fault at the room controller

51

52

Electrical backup systemfailure

Functional buttondefective

Error Code Cause

Electrical backup

The LCR-2WE retains the settingparameters when the power

or shut down by power outagesand back to the preset operation.

11

Fault Codes

12

Design Standards

EMC Directive (Electromagnetic compatibility) 89/336/EC Standards: EN 61000-6-1: Electromagnetic Compatibility Generic Standard – Immunity for residential, commercial and light industrial environments. (Feb 2001)

EN 61000-6-3: Electromagnetic Compatibility Generic Standard – Emission standard for residential, commercial and light industrial environments. (Feb 2001)

LV Directive (Low voltage) 73/23/EEC Standard: EN 60335-1: Household and similar electrical appliances - Safety (May 2001)

Boiler Efficiency Directive 92/42/EEC Standard: BSEN 304: Oil boilers with forced draft burners.

Fuel Spillage 1. Switch off all electrical and other ignition sources.2. Remove all contaminated clothing to safeguard against fire risk and skin

damage. Wash affected skin thoroughly with soap and water and removeclothing to a safe well ventilated area and allow to air before cleaning.

3. Contain and smother the spill using sand or other suitable oil absorbentmedia or non-combustible material.

4. Do not allow fuel to escape into drains or water courses. If this happens,contact the relevant authorities in your area. (Ireland only). Contact theEnvironment Agency on 0800 807060 (UK Only)

5. Consult local authority about disposal of contaminated soil, seehttp://www.housing.gov.ie/local-government/administration/local-authorities/local-authorities

INSTALLER SECTION

13

Safety Safe use of kerosene. These fuels give off a flammable vapour when heated moderately. Vapour ignites easily, burns intensely and may cause explosion. The vapour can follow along at ground level for considerable distances from open containers and spillages collecting as an explosive mixture in drains, cellars, etc.

Fuels remove natural oils and fats from the skin and this may cause irritation and cracking of skin. Barrier cream containing lanolin is highly recommended together with good personal hygiene and where necessary appropriate personal protection equipment. (P.P.E.) Gas oil may also cause irreversible damage to health on prolonged or repeated skin contact.

Always store fuels in a properly constructed and labelled tank. Always handle fuel in open air or well ventilated space away from sources of ignition and refrain from smoking.

Always drain fuel using a proper fuel retriever, funnel or mechanical siphon. Never apply heat to a fuel tank, container or pipework. Never siphon fuel through tube by mouth. If accidentally swallowed contact doctor immediately and do NOT induce vomiting. Avoid inhaling fuel vapour as this can cause light headedness and seriously impair judgement.

First Aid If fuel is accidently swallowed: Seek medical attention immediately and DO NOT induce vomiting.

If fuel is splashed into your eyes: Wash out with running water for at least ten minutes and seek medical attention as soon as possible.

14

Flues Regulations

Balanced Flue Siting

Note: 1. Terminal should be positioned to avoid combustion products entering the building

or accumulating in stagnant pockets around buildings.2. The terminal must be protected by a guard if it is less than 2 metres above ground

level or in a position where any person has access.3. A heat protection shield should be fitted if the terminal is less than 850mm from a

plastic or painted gutter or less than 450mm from painted eaves.

Saturn Heating recommends as per OFTEC recommendations that the flue should be a minimum distance of 1 metre from openings so that it does not cause a nuisance and permits the dispersal of combustion products.

Building Regulations A B C Northern Ireland 600 600 600 Republic of Ireland 600 600 600

Where the terminal is within 1 metre of any plastic material, such material should be protected from the effects of combustion products of fuel. There are additional general requirements in most regulations and standards that the flue must be positioned so that it does not cause a nuisance and permits the dispersal of combustion products. Note: The Building Regulations clearances shown above are the minimum allowed. Contact Saturn Heating Technical Department for futher advice in this regard.

ALWAYS CHECK FOR ANY BUILDING REGULATIONS AMENDMENTS WHICH MAY HAVE BEEN ISSUED AFTER THE PUBLICATION OF THIS MANUAL

a) Horizontal from opening,airbrick, opening windowetc.

b) From an internal or externalcorner.

c) Below an opening, airbrick,opening window etc.

Information supplied by Book Four, 2010.

Please see note at foot of page.

15

Flues Regulations

Clearances advised by the British Standards, provided by OFTEC, for open flues, low level balanced flues and balanced flues fitted to oil fired boilers.

Minimum distances to terminals in millimetres as measured from top of the chimney or the rim of a low level discharge opening.

Aplliance Burner Type Pressure Jet

Vapourising

A Directly below an opening, air brick, opening window etc 600 Not allowed

B Horizontally to an opening, air brick, opening window etc 600 Not allowed

C Below a gutter, eaves or balcony without protection 75 Not allowed

D Below a gutter or a balcony without protection 600 Not allowed

E From vertical sanitary pipework 300 Not allowed

F From an internal or external corner or surface or boundary alongside the terminal

300 Not allowed

G Above ground or balcony level 300 Not allowed

H From a surface or boundary facing the terminal 600 Not allowed

J From a terminal facing a terminal 1200 Not allowed

K Vertically from a terminal on the same wall 1500 Not allowed

L Horizontally from a terminal on the same wall 750 Not allowed

M Above the highest point of an intersection with the roof 600 1000

N From a vertical structure on the side of the terminal 750 2300 O Above a vertical structure less than 750mm from the side of the

terminal600 1000

P Directly below an opening, air brick, opening window etc. 1500 Not allowed

Notes: - Terminals should be positioned so as to avoid products of combustion accumulating instagnant pockets around the building or entering into buildings.- Appliances burning Class D oil have additional restrictions (See OFTEC Book 4 2010)- Vertical structure in N, O and P include tank or lift rooms, parapets, dormers etc.

16

Flues Regulations - Terminating positions A to L are only permitted for appliances that have been approvedfor low level flue discharge when tested to OFS A100 or A101- Terminating positions must be at least 1.8 metres distant from an oil storage tank unlessa wall with at least 30 mins fire resistance and extending 300mm higher and wider than thetank is provided between the tank and the terminating position.- Where a flue is terminated less than 600mm away from a projection above it and theprojection consists of plastic or has a combustible or painted surface, then a heat shield ofat least 750mm wide should be fitted to protect these surfaces.- For terminals used with vapourising burners, a horizontal distance of at least 2300mm isrequired between the terminal and the roof line.- If the lowest part of the terminal is less than 2 metres above the ground, balcony, flatroof or other place to which any person has access, the terminal must be protected by aguard.- Notwithstanding the dimensions given in the drawing and table, a terminal should not besited closer than 300mm to combustible material.

Ventilation & Combustion Air Conventional Flue Boilers An adequate supply of combustion and ventilation air is essential for efficient and safe boiler operation and the openings for this should be positioned to cause least possible draught, with no possibility of being accidentally blocked. Please note, the British Standard Code of Practice for Oil Firing BS5410:Part 1, requires a permanent air inlet opening of 550mm² per kW (above 5kW) of boiler rated output. (Note: 1kW = 3412 Btu/h).

Also when the boiler is installed in a compartment or confined space, ventilation openings are required to ventilate and to avoid overheating in the boiler area.

FULL TEXT of both BS 5410 Part 1: 1997 and appropriate Building Regulations for each country should be obtained and fully applied.

17

Flues Regulations N.B. Please Carefully Note: In OFTEC Book Four, 2010 page 33, 6.6.5 states that for the Republic of Ireland, “It is not permitted to install open flue appliances in domestic garages, therefore only room sealed balance flue appliances should be installed in a garage location”

Definitions: Combustion Air: Air required directly by boiler oil burner for combustion process. Ventilation Air: Air required in the room for ventilation, cooling, etc. and to promote a healthy living environment.

Other Notable RegulationsOil Storage Tank SitingFor single family dwellings where oil storage is external and does not exceed 3500 litres, the following separation distances apply:

Fire Valve InstallationFor reasons of safety, a fire valve is an essential part of an appliance installation, although the fire valve body is located within the oil supply system. Fire valves should be of the remote acting type which are capable of cutting off the flow of oil outside the building in the event of a fire or overheat situation occurring at the appliance.

* See OFTEC Book 3, 2010 Edition for full details on both Oil Storage Tank Siting and alsoFire Valve Installation.

Check all pipe connections thoroughly forleaks before start-up.

Before using the boiler

18

Fuel

It is essential to use only kerosene or light oil.It is better to use kerosene when the temperature can drop below -5 ̊ C.

Choose a fuel storage location in accordance with local regulations (See page 14 - Flue Regulations). Take care to avoid the ingress of water and/or dirt during re-filling as this can lead to f lame failure or affect the lifespan of the boiler.

Ensure that the power is turned off andthe oil tank is isolated before refilling.

A fuel filter with a filter rating of 70microns or better must be fitted to the fuel supply, to the appliance.

Pre-Start Checks

and that the low water level alarm is not activated.

suitable measurement equipment to ensurecorrect combustion is taking place.Do not plug out the power supply as this willde-activate the frost protection.

The domestic hot water supply is notrecommended for potable use.(Combi only)

19

Notes when using

Take care when positioning the boiler. Do not locate in the immediate vicinity of flammable materials.

Avo o e e o e

Avoid complete emptying of the oil tank.This can lead to air being introduced tothe fuel system and may result in ignition failure.

the fuel supply line to vent. When oil starts to

In negative head oil supply applications thefuel supply line must be purged using the

screw must be in the tightened position.oil pump vent screw. For this the oil filter

Open the oil pump vent screw and switchon the power to the boiler. After 6-7 secondsthe pump has purged the air and the“CHECK” light will show on the control panel.The boiler will stop.

Loosen the screw in the oil filter. This will allow

flow re-tighten the screw (this is only possiblein positive head oil supply applications).

and that the low water level alarm is not activated.

of flammable materials.Voit free boiler call(orange cable)warning connecting power to the boilercall will damage the control panel.

Ensure that there is sufficient water in the system

Take care when positioning the boiler.Do not locate in the immediate vicinity

suitable measurement equipment to ensure

Confirm that the ignition and combustion of theboiler are normal. Use the flue gas test port and

correct combustion is taking place. If the boiler is

power via the controller. Do not plug out theboiler as this will de-activate the frost protection.

The domestic hot water supply is notrecommended for potable use.(Combi only)

not being used for extended periods turn off the

How to use

20

Purging the oil supply

Ensure the system is full and at suitableoperation pressures. Fill and thoroughlypurge all connected pipework.

21

Reset the boiler by turning the power off and on.Close the oil pump vent, press the power buttonagain and the boiler will ignite. If the boiler fails to fire after 3 successive attempts contact the Saturntechnical helpline on 1890 929 112.

Preparation and checking before start-up

The boiler must always be correctlygrounded according to relevant local regulations.

Connect the boiler to the main 220v supplyand press the power button. The “RUN”light should show after a short period.

Volt free boiler call (Orange cable)Warning: Connecting power to this cable will damage the boiler control panel.

Full wiring instructions on pages 36-41

When the boiler does not ignite, or if the flamefalls the flame detector (photocell) willdeactivate the boiler.

Ignition safety device

Low water level safety device

22

Safety devices

If the water level is insufficient in the boilerthe low water level sensor will deactivatethe boiler. Once the system is adequatelyrefilled this will automatically reset.

Overheat preventionIf the temperature of the boiler rises to dangerously high levels the overheatsensor will deactivate the boiler.In this instance the “CHECK” light will show. To reset press the “RESET” button on the overheat preventer.

Frost freezing preventionAt a boiler temperature of 9°C the circulating pump will be activated. At a boiler temperature of 2°C the burner will ignite. For this reason, power must be maintained to the boiler, even if the system is not in use.

Power-failure protectionIn the event of power failure the oil supply will automatically be isolated from the combustion chamber.

Ensure that combustible materials arenot stored near the boiler.

Check for fuel leaks within the fuelstorage/supply system and check forwater leaks within and around the boiler.

Inspect the inside of the oil tankfor water or debris.

Keep the area around the boiler clean and freefrom obstruction to allow for free air flow.

23

Everyday checks

Points to be checked once or more a year

24

Cleaning of the boiler

Soot build-up within the boiler will reduce its

The boiler should be serviced annuallyby an approved service engineer.

Cleaning the oil filter

To clean the oil filter, first isolate the oil supply. Remove the oil cup by unscrewing and pulling the cup downwards. Wash the filter and the inside of the coil cup using clean kerosene.

Flexible oil lineFlexible oil lines must be changed every 2 years, if no date is specified on the old line it must be changed for good practice and OFTEC regulations

Cleaning the oil tank

The oil tank should be checked during the annual service and cleaned of all waterand debris as required.

Servicing The Boiler

If the flame detector (photocell) becomes sootyor dirty the reduced sensitivity will cause erratic and incorrect boiler operation.

Cleaning the flame detector

Remove the flame detector (photocell) whichis located at the top of the burner.

Wipe the glass surface of the flame detector (photocell) using a clean rag and replace.

During the annual service the flue system should be checked for correct installation, blockages, corrosion or leakage. Any abnormalities found should be rectified immediately.

Checking the flue pipe

25

Open cistern tank

Never install any valve betweenboiler and cistern tank

Supply WaterPipe

Minimum 1.5 m

Circulating PumpDistributor

Distributor

CondensateOutlet

Drain Drain

F.L

Expansion Tank Combi only

WaterCold Water Inlet

Heating FlowHeating Return

Cold Water Hot Water

Boiler Back

26

Plumbing Schematic

Choosing of the installation place

Choose an installation site that allows easy access for installation, maintenance and operation.

When choosing an installation site, take care to conform to all local regulations and standards. Allow as much free space around the boiler as possible for maintenance and reduced fire hazard. Ensure that the boiler is accessible in order to allow for easy adjustment of the boiler temperature.

The boiler should not be sited close to storage areas of combustible materials. Consider condensate and boiler drainage requirements when choosing the boiler location.

Installation diagram : Cistern tank install type

Heating CoilFan CoilRadiator

1. The system should be installed with a pressure safety valve rated to 3.5 Bar or less.2. The maximum operating pressure is 3.5 Bar. Neither the boiler nor any connected pipe

work should be exposed to pressures in excess of this.3. Always install the boiler and the connected system according to local regulations.

Sealed System

Precautions

Safety ValveAir Exhaust Valve

Filter

Reducing Valve

Check Valve

Circulation PumpDistributor

CondensateOutlet

Drain Drain

F.L

Sealed Expansion Tank

Install the condensate outlet hose as above

Water

Cold Water Inlet

Hot Water Outlet

Heating Water Outlet

Cold Water Hot Water

Heating CoilFan CoilRadiator

Boiler Back

Combi only

27

It is recommended that the flue system not exceed 7 metres in length and that nomore than 2 bends be used. Subtract one metre for every 90° bend and 500ml forevery 45° bend.

Condensing boiler model : NHC25B/30B/41B

Flue Installation

Allowing combustion gas to re-enter theboiler room can result in a build up ofcarbon monoxide, which could result inpoisoning. Saturn recommends theinstallation of a suitable carbon monoxidedetector on all installations.

CAUTION

VENTILATING OPENING

10˚ OVER

300mm OVER

AIR INLET

FIREPROOF INSULATIONMATERIAL

150mm OVERFIREPROOF INSULATIONMATERIALFIRE WALL, SEMI FIRE WALL

The flue should be installed at an angle of no more than 10°. The flue should bemade from heat-resistant non-corrosive material.

28

Example of a standard installation

1. Condensate is produced when the condensing boiler is running and should be piped to the drainage system.

2. Link the drain hose with the outlet of the neutralization system which is located at the bottom of boiler and then connect the end of the hose to a soak pit.

3. Please make sure that the neutralizer in the boiler is filled with water.4. The condensate drain system should be installed to minimise the risk of freezing.

Ensure the condensate is sentto a suitable waste outlet inaccordance with regulations.

29

Commissioning The Boiler

30

1. Prime the boiler with kerosene and press the power button on, ensuring there is a heat request from your time clock. The boiler then takes 3 attempts to go into ignition phase.

2. The fan will start up and purge the air through the heat exchanger- Troubleshooting if sequence missed:

• No heat request, or incorrect wiring, please refer to "Wiring The Boiler"3. The transformer will begin to generate a spark at the electrodes

- Troubleshooting if sequence missed:• Photocell disconnected/dirty: reconnect/clean

4. The oil pump will engage to pump oil to the burner- Troubleshooting if sequence missed:

• Not fully primed with oil bowl filled and oil line clear of air• This will be apparent by the pump making a loud noise

5. Successful ignition can be seen through the sight glass

All boilers come pretested from the factory, so minimal adjustments are needed on commissioning. Using a flue gas analyser, you are looking for the following read outs:- 11.5% Co2- 50-60 PPM

Simply adjust the damper opening on the burner to achieve these numbers

Component Overview

31

The structure of the boilerModelNo: NHC 25B/30B/41B

Neutralizer assembly

Burner Assembly

Return water pipe for space heating

Electronic pump &

Oil filter

Overheat preventer Low water level sensor

Temperature sensor

Controller

Heat Exchanger

FE flue, Φ75

Component Overview

32

The structure of burnerModelNo: NHC 25B/30B/41B

Damper

Fan 3

Fan 2

Fan 1

Fan Causing

Fan Motor

Ignition Electrode

Blow tube & �ame holder

Air holder

Nozzle

Inner tube

Flame detector

Component Overview

33

The principle of the burnerModelNo: NHC 25B/30B/41B

Construction of Burner

Air Flow

Oil Fluid

Air Flow

Oil inlet

1) Fan (motor) working

2) Ignition transformer is working

3) Electronic pump is working ; oil

pressure increase

4) Sensing combustion and

flame

5) Continuous combustion

Burner Running Mechanism

Flame holder : Oil & air mixing zone

Air holder : assist the ignition

Component Overview

34

The structure of the heat exchangerModelNo: NHC 25B/30B/41B

Ba�e plates

H.E. for DHW

Combustion chamber

Straight pipes

NHC-25H/30H/41H does not come with an in-built DHW heat exchanger.

NHC-25EH/30EH/41EH does not come with an in-built DHW heat exchanger.

Component Overview

35

The principle of the heat exchangerModelNo: NHC 25B/30B/41B

Construction of Condensing Boiler

Heat Fluid

Heat transfer Fluid

Figure of Heat transfer method

Parallel Flow Counter Flow Counter Flow

Condensate outlet

Chamber Temp. about 800 C

Fluid Flow

200 C under

75 C under

Counter Flow : 2 times

Parallel Flow : 1 time

NHC-25H/30H/41H does not come with an in-built DHW heat exchanger.

NHC-25EH/30EH/41EH does not come with an in-built DHW heat exchanger.

36

Color : White

1 AB

6

4

C

531

642

BLACK TUBE

Orange

Blue

ABC

ABC

Blue

D5 3

01

11

02

12

03

13

04

14

05

151617

06

18

07

19

08

20

0910

21

White

Red

Red

Black

Skyblue

Brown

Yellow

Green +

YellowEA

RTH

LOW

WA

TER SENSO

R

HIG

H LIM

IT STAT

Black

Black

Skyblue

Brown

Brown

BlackBlue

Brown

OIL PREH

EATER C

ABLE

CIRCULA

TION

PUM

P

Blue

Brown

HEATING

WATER TEM

P. SENSO

R

VOLT-FREE HEAT REQ

UEST

D

D

C

C

OIL PU

MP

Blue

Brown

Power cord

Green +

Yellow

Blue

Yellow

[BOILER]

[BURN

ER]

Brown

OU

TDO

OR TEM

P. SENSO

R

AU

XILIA

RY SENSO

RBlack

BOO

STER PUMP

1

46

465 3

15 3

Electric wiring diagram

Blue

Brown

Green +

Yellow

(White)

WEA

THER

CO

MP M

OD

E

WEA

THER

CO

MP M

OD

E

(White)

ModelNo: NHC 25B/30B/41B

37

Electric Wiring – Installation Variations

Note: Boiler temperature display will only be shown when there is a heat request through the switch live as permanent supply has not been provided.

3 Core Wiring Diagram(Warning, without permanent supply, the frost stat is disabled)

38

Electric Wiring – Installation Variations

Note: Due to the above setup using a 230v switch live, for a heat request from the boiler, an NO stepdown relay or a motorised valve is needed to connect into the low voltage heat request orange cables.

4 Core Wiring Diagram

39

Electric Wiring – Installation Variations

Note: Simply join single auxiliaries from multiple MV’s and bring to the boiler in 2 core fashion. If any MV opens, the volt free auxiliary will call for a heat request.

5 Core Wiring Diagram

40

Electric Wiring – Installation Variations

Note: Simply connect the volt free orange heat call to the back of the combi controller, and now the red cables coming from the controller, by extension, become your low voltage heat call.

5 Core Wiring Diagram - Combi Only

41

All wiring must be in accordance with its instructions for connections with the valvecontroller properly and unused wire should be insulated and short-circuited.

1. Connect the cables of room thermostat properly to the terminal of valve contoller in accordance with following each colored cable;- Red : Heating- Blue : Fault signal (NA)- Yellow : Combustion signal (NA)

Unused wire should be insulated and short-circuited.

2. The pin rail on the back of the thermostat must connect to 2 orange cables from the boiler.

3. Fix the wall socket with the screws provided.

Boiler

AC 220VMain Controller

Valve Controller

Red wires

Auxillary wiresLN

MV

Room thermostat Input/outputterminal

Room thermostat (LCR-2WE) - Combi only

4. Carefully push and fit the thermostat on to the wall socket until it clicks in position.

42

OTC Mode

If an outdoor temperature probe is connected, the weather compensation function can be used in conjunction with the weather comp' relay available at your local Saturn stockist .

1) With this function, the target primary temperature is automaticallyset according to the outdoor temperature (K-Factor).

2) When the outdoor temperature sensor is connected, OTC lamp is turned on.3) The outdoor temperature sensor should be placed in an area to avoid

temperature fluctuations caused from direct sunlight. Preferable the sensor should be located in a north facing location.

K-Factor

43

1. Check that the Outdoor Tempsensor has been connected properly.2. Check the OTC mode is working byreturning to Central Heating mode(Press the Mode button repeatedly,until or is displayed.)

※ Please contact Saturn Technical department for any unclear matters.

1. On pressing thepower button, themotor doesn’t work

2. The motor rotates,but the boiler doesn’tignite

3. The boiler ignites, butimmediately stops

4. The electronic pumpmakes noise

2.Check and clean electrode.Check nozzle and change if necessary.

6. Smoke and sootbuild up

1.

2.

The oil is bad or has impure materials.The air for combustion is short.

1.2.

Replace the oil.Check external filter bowl.

1. The oil valve is locked.2. There is no oil in the tank.3. There is air in pipes.4.

1.

2.

3.4.

1.2.3.

There is air in the oil line.The oil tank is empty.

1. Open the valve.2. Supply oil.3.4. Clean the boiler.

1.2.3.

1.2.

1.

2.3. No heat request.

1.

2.

This is not a problem.When the temperature of the boiler goes down, it will restart.Check 5 AMP fuse spur/power.

3. Check time clock and stats for heat request.

Happening Cause Solution methods

8. The appliance does notgo into OTC mode

1.

2.

The Outdoor Temperaturesensor is not connectedcorrectly.

Hot Water activation

Troubleshooting

The temperature in the boiler is above the set temperature.No power.

The oil in the oil tank isinsufficient.The flame detector cannot sense.The oil filter is blocked. Impurities in the oil.

Supply more oil.Clean the flame detector. Clean the oil filter.Replace the oil with good oil.4.

The oil filter is blocked. Clean the oil filter.Vent the oil line.

3. Ref i ll the oil tank.

5. On igniting, it backfires 1. Electrode fault.

OTC Mode turns off during

Dirty nozzle. 2.1.

44

Fault Codes

When an error occurs, the LCD shows one of the following numeric error codeswith letter ’E’.

Error Code Cause

02

03

04

05

06

12

16

Low water level

Temp. sensor wire disconnected

Short circuit of Temp. sensor

High limit thermostat

Flame failure

Misfire in combustion

Misfire

45

Product Information

KD Navien symbol Unit NHC 25B NHC 30B NHC 41B

Condensing boiler YES YES YES

Low-temperature(**) boiler NO NO NO

B1 boiler NO NO NO

Combination heater YES YES YES

Rated heat output Prated kW 24.0 27.9 36.8

ηs % 91 90 91

Useful heat output

"At rated heat output and high-temperature regime(*)"

P4 kW 24.0 27.9 36.8

"At 30% of rated heat output and low-temperature regime(**)"

P1 kW 7.7 9.3 11.9

"At rated heat output and high-temperature regime(*)"

η4 % 92.1 91.3 91.7

"At 30% of rated heat output and low-temperature regime(**)"

η1 % 97.4 96.0 96.6

Auxiliary electricity consumption

At full load elmax kW 0.136 0.145 0.163

At part load elmin kW 0.057 0.060 0.066

In standby mode Psb kW 0.013 0.014 0.012

Other items

Standby heat loss Pstby kW 0.111 0.111 0.140

Ignition burner power consumption Pign kW 0 0 0

Annual energy consumption QHE kWh 76 89 116

Sound power level, indoors LWA dB 68 66 69

For combination heaters

XL XL XXL

Daily electricity consumption Qelec kWh 0.443 0.440 0.468

Annual electricity consumption AEC kWh 94 93 105

ηwh % 64 62 67

Daily fuel consumption Qfuel kWh 28.617 29.532 35.339

Annual fuel consumption AFC GJ 22 23 30

Contact details Saturn Heating Ltd, Shercock Road, CarrickmacrossCo. Monaghan, Ireland

(*) 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).

Seasonal space heating energy efficiency

Declared load profile

Water heating energy efficiency

2 30004397A Flame Detector €6.00

30005541A €32.10

30005542A €36.60

30004721C €17.10

30004727C €17.10

30004728C €17.10

5 30004361D Ignition Transformer €39.00

6 20010578A Ignitor €11.25

3 Motor

4 Flame Holder

46

Spare Parts List (Burner)

No. Part No. Part Name NOTE1 30007780D Harness ALL MODEL

20014282A Upper Plate NHC-25B20005292A Upper Plate NHC-30,41B20014294A Fixing plate NHC-25B20005531A Fixing plate NHC-30,41B

4 30007195A Window Ass'y ALL MODEL20014284A Side Cover(left) NHC-25B20012251A Side Cover(left) NHC-30B20012483A Side Cover(left) NHC-41B20014286A Side Cover(right) NHC-25B20012274A Side Cover(right) NHC-30B20012494A Side Cover(right) NHC-41B20014288A Rear Cover NHC-25B20012298A Rear Cover NHC-30B20005373A Rear Cover NHC-41B20017026A Front Cover NHC-25B20017126A Front Cover NHC-30B20017127A Front Cover NHC-41B

9 30012754A PCB Ass'y ALL MODEL10 30002845A Preheater Assembly ALL MODEL11 30003527B Internal Flue ALL MODEL

30010383B Electric Pump Assembly NHC-25B30010388B Electric Pump Assembly NHC-30B30010389B Electric Pump Assembly NHC-41B

13 30004241A booster pump ALL MODEL14 30004377D Oil Filter Ass'y ALL MODEL15 20010104D Flexible Hose ALL MODEL16 30003745A Condensate Neutralizing Equipment ALL MODEL

30003760B Condensate Hose NHC-25B20016346B Condensate Hose NHC-30,41B

18 30002556A High Limit Switch ALL MODEL19 30002661A Low Water Level Sensor ALL MODEL

30003457A Silence Adaptor NHC-25B30003491A Silence Adaptor NHC-30,41B30005321A Oil Burner Assembly NHC-25B30005328A Oil Burner Assembly NHC-30B30005336A Oil Burner Assembly NHC-41B

12

2

3

5

6

7

8

17

20

21

47

Spare Parts List (Burner)

NO. PART CODE DESCRIPTION MODEL20010476A OIL Nozzle NHC-25B20010484A OIL Nozzle NHC-30B20010506A OIL Nozzle NHC-41B

2 30004397A Photocell (flame detector) ALL MODEL30005541A Motor NHC-25,30B30005542A Motor NHC-41B30004721C Flame Holder NHC-25B30004727C Flame Holder NHC-30B30004728C Flame Holder NHC-41B

5 30004361D Ignition Transformer ALL MODEL6 20010578A Ignitor ALL MODEL

NO. PART CODE DESCRIPTION MODEL1 30000670A Outdoor Sensor ALL MODEL

3

1

4

48

Spare Parts List (Burner)

49

SATURN CONDENSING OIL BOILER

ITEM UNIT NHC 25B NHC 30B NHC 41B

HEAT OUTPUT HEATING kW 24.0 27.9 36.8

FOR USE(Combi only) Heating

FUEL Light Oil

BUILDING SIZE ㎡ Less than 132 Less than 165 Less than 232

MAXIMUM WORKING PRESSUREBar 3.5

(kPa) 343

HEAT TRANSFERING SIZE ㎡ 1.60 2.08 2.40

FUEL CONSUMPTION kg/h 2.07 2.43 3.19

TYPE OF AIR / EXHAUST GAS FE

HEATING EFFICIENCY % 97.6 96.8 97.2

ELECTRICITY CONSUMPTION COMBUSTION W 136 145 163

POWER V, Hz 220V, 50Hz

WATER STORAGE CAPACITY ℓ 34.0 41.0 48.0

BOILER HOUSE DIMENSIONSW×L×H

410×665×1,031 444×706×1,051 444×706×1,186mm

WEIGHT kg 59 64 72

PIPING HEATING A 1"

HOT WATER A 1/2"

DIAMETER FLUE Φmm EXHAUST : 75

Oil Nozzle Type 0.60 / 60˚EH 0.75 / 60˚ES 1.00 / 80˚ES

kg/h

10 10 10

0-1 0-1 0-1

Fuel Flow Rate 2.07 2.43 3.19

% 11.5 11.5 11.5

EXTERNAL CABIN PACK DIMENSIONSW×L×H

600×725×1,090 635×780×1,110 635×780×1,180mm

Oil Pressure

Smoke Number

Bar

CO2

°C 60-65 65-70 70-75 Flue Gas Temperature

50

CE marking

In accordance with the following European Standard

EN 267, EN 304, EN 15034, EN 55014-2, EN 61000-3-2, EN 61000-3-3, EN 60335-1, EN 60335-2-102

In accordance with the following Directives

Directive 92/42/EECErP Ecodesign : Directive 2009/125/EC 813/2013ErP Labelling : Directive 2010/30/EU 811/2013Low voltage : Directive 2006/95/ECElectoro-magnetic Compatibility : Directive 2004/108/EC

Navien, manufactures its product using a Quality Assurance system in compliancewith Standard EN-ISO 9001:2000.

1506

Warranty period begins from first day of operational use of boiler.

The warranty of the application is conditional upon correct installation, completion of the passport document and returning the commissioning certificate to the appliance manufacturer - if you don't do this the warranty could be invalid.

Boiler passport must be returned within 28 days of installation to validate warranty.

2001

6914

E

BO-E-M-10-3

Saturn Heating Distributed exclusively by: Saturn Heating Ltd Shercock rd. CarrickmacrossCo. MonaghanA81 HK09Ireland

Technical Helpline: (IRE) 1890 929 112

Sales: (IRE) +353 (0)42 9692032

E-mail : info@saturnheating.net

www.saturnheating.net