Warmhaus Minerwa 25 System IE Supplement

MinerWa 25 System – IE
CONDENSING SYSTEM BOILER
INSTALLATION & SERVICE MANUAL

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The Benchmark Scheme
Warmhaus is a licensed member of the Benchmark Scheme which aims to improve the standards
of installation and commissioning of domestic heating and hot water systems in the UK and to
encourage regular servicing to optimise safety, efficiency and performance.
Benchmark is managed and promoted by the Heating and Hotwater Industry Council.
For more information visit www.centralheating.co.uk
Please ensure that the installer has fully completed the Benchmark Checklist in the use and
maintenance section of the installation instructions supplied with the product and that you have
signed it to say that you have received a full and clear explanation of its operation.
The installer is legally required to complete a commissioning checklist as a means of complying
with the appropriate Building Regulations (England and Wales).
All installations must be notified to Local Area Building Control either directly or through a
Competent Persons Scheme.
A Building Regulations Compliance Certificate will then be issued to the customer who should, on
receipt, write the Notification Number on the Benchmark Checklist.
This product should be serviced regularly to optimise its safety, efficiency and performance.
The service engineer should complete the relevant Service Record on the Benchmark Checklist
after each service.
The Benchmark Checklist may be required in the event of any warranty work and as supporting
documentation relating to home improvements in the optional documents section of the Home
Information Pack

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CONTENTS
1. INTRODUCTION.................................................................................. 6
1.1. BOILER DESCRIPTION...........................................................................6
1.2. SAFETY INSTRUCTIONS: ......................................................................6
1.3. TECHNICAL SPECIFICATION ............................................................... 8
1.4. PRODUCT IDENTIFICATION.................................................................9
1.5. REGULATIONS.........................................................................................9
2. PRE-INSTALLATION..........................................................................10
2.1. PACKING CONTENTS........................................................................... 10
2.2. APPLIANCE OVERVIEW...................................................................... 10
2.3. LOCATION OF BOILER / CLEARANCE..............................................11
2.4. SYSTEM REQUIREMENTS ....................................................................12
2.4.1. GENERAL ......................................................................................................................... 12
2.5. WATER SUPPLY (ONLY FOR COMBI BOILER)................................12
2.6. GAS SUPPLY............................................................................................12
2.6.1. BY-PASS............................................................................................................................ 12
2.6.2. VENTILATION.................................................................................................................. 12
2.6.3. PRIMARY SYSTEM CLEANING................................................................................... 12
2.7. ELECTRIC SUPPLY.................................................................................12
2.8. PRV DISCHARGE....................................................................................12
2.9. FLUE TERMINAL POSITION ................................................................13
3. INSTALLATION ..................................................................................14
3.1. UNPACKING APPLIANCE.................................................................... 14
3.2. APPLIANCE POSITION ........................................................................ 14
3.3. WALL MOUNTING TEMPLATE ........................................................... 14
3.4. PREPARING THE WALL – DRILL FLUE HOLE ................................ 14
3.5. INSTALLING MOUNTING BRACKET ................................................. 14
3.6. HANGING THE BOILER........................................................................ 14
3.7. APPLIANCE CONNECTIONS ...............................................................15
3.8. FILLING APPLIANCE & ADDING INHIBITOR ...................................16
3.9. INSTALLATION WITH HORIZONTAL FLUE SETS...........................16
3.10. INSTALLING THE FLUE SYSTEM ........................................................17
3.11. INSTALLATION WITH VERTICAL
FLUE SETS (Ø60/100 MM)..................................................................18
3.12. CONCENTRIC FLUE KITS FOR
CONDENSING BOILERS (Ø60/100 MM) ........................................ 20
3.13. PLUME DISPLACEMENT KITS Ø60 MM ...........................................21
3.14. RECOMMENDATIONS OF PLUME KIT INSTALLATION..................21
3.15. CONDENSATE CONNECTION ............................................................22
3.16. MINERWA 25 SYSTEM – IE WIRING DIAGRAM..............................26
3.16.1. EXTERNAL CONTROL CONNECTION / LOW VOLTAGE INSTALLATION..... 27
3.16.2. EXTERNAL CONTROL CONNECTION / LOW VOLTAGE INSTALLATION..... 27
3.16.3. EXTERNAL CONTROL CONNECTION / SPLAN WIRING DIAGRAM.............. 28
3.16.4. EXTERNAL CONTROL CONNECTION / YPLAN WIRING DIAGRAM.............. 29
4. COMMISSIONING.............................................................................. 30
4.1. DISPLAY FUNCTION............................................................................ 30
4.1.1. SET TRANSPARENT PARAMETERS MENU (TSP) ...............................................30
4.1.2. PARAMETERS ................................................................................................................. 31
4.1.3. PARAMETER INFORMATION.....................................................................................36
4.2. SERVICE MODE .....................................................................................36
4.3. CALIBRATION........................................................................................37
4.3.1. AUTO CALIBRATION.................................................................................................... 37
4.3.2. AUTO CALIBRATION.................................................................................................... 38
4.3.3. MANUAL CALIBRATION ............................................................................................. 39
4.3.4. ESF (EASY START UP FUNCTION)..........................................................................40
4.4. INFORMATION MENU ACCESS..........................................................42
4.5. DEAERATION MODE ............................................................................43
4.6. PRE-COMMISSIONING CHECKLIST ................................................. 44
4.7. CHECKING INLET GAS PRESSURE.................................................. 44
4.8. TESTING FOR GAS LEAKS DURING USE ....................................... 44
4.9. CHECK GAS RATE................................................................................ 44
4.10. CIRCULATION PUMP ROTATION.......................................................45
4.11. SETTING UP THE EXTERNAL CONTROLS......................................45
4.12. GAS CONVERSION FROM NG (G20) TO LPG (G31).................... 46
4.13. GAS CONVERSION FROM LPG (G31) TO NG (G20).....................47
4.14. CO/CO2 COMBUSTION CHECK.........................................................48
5. SERVICING & PART REPLACEMENT ............................................. 49
5.1. REPLACEMENT OF COMPONENTS - FIRST STAGE......................49
5.2. REPLACEMENT OF COMPONENTS - FINAL STAGE.....................49
5.3. DRAINING THE BOILER / CH CIRCUIT............................................49
5.4. DRAINING THE BOILER / DHW CIRCUIT (ONLY FOR COMBI
BOILERS)................................................................................................49
5.5. FLUE THERMISTOR REPLACEMENT ............................................... 50
5.6. IGNITION ELECTRODE REPLACEMENT......................................... 50
5.7. NOZZLE REPLACEMENT.................................................................... 50
5.8. FLOW & RETURN THERMISTOR REPLACEMENT...........................51
5.9. INTERFACE PCB REPLACEMENT.......................................................51
5.10. MAIN PCB REPLACEMENT ..................................................................51
5.11. 3-WAY INNER KIT REPLACEMENT - TOP ........................................51
5.12. PUMP HEAD REPLACEMENT ..............................................................51
5.13. OUTLET MANIFOLD REPLACEMENT...............................................52
5.14. WATER PRESSURE SENSOR REPLACEMENT................................52
5.15. 3 BAR SAFETY VALVE REPLACEMENT...........................................52
5.16. DHW FLOW SENSOR REPLACEMENT
(FOR COMBI BOILERS ONLY) ...........................................................52
5.17. DHW PLATE HEAT EXCHANGER REPLACEMENT
(FOR COMBI BOILERS ONLY) ...........................................................52
6. FAULT CODES ................................................................................... 53

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1.1. BOILER DESCRIPTION
The Minerwa 25 System Boiler is a high-performance wall mounted energy
ecient unit providing heat for wet central heating systems.
The latest Electronic Gas Adaptive System and Full Premix feature detects
the gas quality instantaneously and keeps the combustion quality constant.
It provides up to 108% eciency gross and excellent energy savings.
DANGER
This safety warning indicates that severe and life-threatening
personal injury will occur.
WARNING
This safety warning indicates that severe and life-threatening
personal injury may occur.
ATTENTION
This safety warning indicates that moderate personal injury may
occur.


RISK OF ELECTRIC SHOCK
This safety warning indicates “DANGER Risk of Electric
Shock”.
CAUTION
This icon indicates that damage could occur to products and
materials.

INFORMATION
This image indicates information you should read and adhere to
for the correct installation of our appliances.
PRV Pressure Relief Valve
NG Natural Gas
LPG Liquid Propane Gas
kW Kilowatts
CH Central Heating
DHW Domestic Hot Water
LHS Left Hand Side
RHS Right Hand Side
Mbar Millibar
ECV Emergency Control Valve
LCD Liquid Crystal Display
FGA Flue Gas Analyser
LDF Leak Detection Fluid
1.2. SAFETY INSTRUCTIONS:

ATTENTION
Please read these instructions fully before installing the appliance:
• These instructions are specific to the model illustrated on the front cover
and detailed in the technical data section of this manual and must not be
used for any other Warmhaus models.
• This appliance must only be installed by a competent Gas Safe registered
engineer and if in Ireland an RGI (Registered Gas Installer) and failure to
adhere to this could lead to prosecution.
• These installation instructions only apply to GB and IE and must be
adhered to with the exception of all statutory regulations.
• These appliances are CE certified for safety and performance and
therefore must in no way be altered or have any device or controls fitted
unless it is approved in this document or in writing from Warmhaus.
• The intended use for this appliance is to heat water and supply DHW in
domestic premises.
• Always refer to the appliance data badge for correct specifications and
ensure the boiler is operating within the safety settings outlined by
Warmhaus.
• Do not modify our flue system, and always use only the Warmhaus
approved flue with this appliance.
• Ensure Warmhaus original flue components including seals and gaskets
are used for the installation of this appliance.
• The installation of the appliance and controls must be done in accordance
to the current Gas Safety (Installation and Use) Regulations.
If you smell gas:
• Do not create flames or sparks, do not operate electric switches or unplug
any appliances.
• Do not use telephones or operate any doorbells.
• Turn o the gas supply at the gas meter or an appropriate emergency
control valve.
• Open doors and windows in the property and advise any neigh boring
properties to adhere to 1,2 and 4.
• Call the National Gas Emergency Service – 0800111999, or in Ireland 1850
20 50 50.
• Prevent people from entering the property.
• For LPG contact the number for the supplier given on the side of the gas
tank.
If you see any damage to the boiler flue or have a carbon monoxide
detector and the warning noise sounds:
• Turn o the appliance.
• Open doors and windows.
• Leave the property and prevent anybody entering.
• Contact either your installer or the Emergency Gas Supplier – 080011199,
or in Ireland 1850 20 50 50.
• Do not use until the issue is identified and the appropriate rectifications
have been carried out.
Electrical work must be carried out by a qualified electrician and in
accordance to all I.E.E and current statutory regulations.
When maintaining a Warmhaus boiler you must only use original and
approved Warmhaus spare parts.
1. INTRODUCTION

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
ATTENTION
• Do not store any combustible materials within the immediate vicinity of
the appliance or any corrosive chemicals that can damage the appliance.
• Always follow the current Health & Safety guidance and advice for manual
handling when lifting the appliance.
• When lifting the appliance always use the appropriate PPE as per the
current guidance in your or industry standard Health & Safety policy.
• Dispose of all the appliance packaging as per your local waste disposal
guidance and obligations.
• This appliance contains NO asbestos or any material that have
contravened the COSHH regulations.
• Take care when handling any sharp edges on the boiler and safety gloves
must be worn.
• Warmhaus boilers are equipped with a diagnostic capability by means
of displaying error codes if the boiler fails to operate correctly, if your
boiler displays an error code please refer to your user manual and arrange
professional assistance where advised.
• Before operating your Warmhaus boiler please read the instructions
supplied with the boiler.
• For installation of this appliance in Ireland the following regulations must
always be followed:
• ECTI - National rules for electrical installations
• Irish Standard IS 10101:2020.
• IS813-2017 - Domestic Gas Installations
Where no specific instructions are given in this technical manual reference
should be made to the relevant British Standard codes of practice:
NSAI SR50-1
Heating systems in dwellings - Part 1:Water-based heating systems
BS7074
I.S. EN12828:2012
Heating systems in buildings - Design for water-based heating systems
I.S. EN12831-1:2017
ENERGY PERFORMANCE OF BUILDINGS - METHOD FOR CALCULATION
OF THE DESIGN HEAT LOAD
I.S. EN14336:2004
Heating systems in buildings. Installation and commissioning of water
based heating systems.
BS7593
WARMHAUS A.Ş. reserves the right to make all kinds of technical and commercial amendments without giving
information and rejects all responsibilities depending on misspelling.
1015

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1.3. TECHNICAL SPECIFICATION
TECHNICAL SPECIFICATION Unit MinerWa 25 System – IE
GC Number
Maxmum DHW Heat Input
(When the boler s connected to an external storage tank unt) kW 31.5
Maxmum CH Heat Input (net) kW 24.2
Mnmum Heat Input (net) kW 3.5
Heatng Crcut G20 G31
Maxmum Heat Output (80/60 °C) Pn 23.7 23.7
Mnmum Heat Output (80/60 °C) Pn 3.0 2.5
Maxmum Heat Output (50/30 °C) Pnc 25 25
Mnmum Heat Output (50/30 °C) Pnc 3.6 2.9
Maxmum Pressure bar 3
Mnmum Pressure bar 0.3
Expanson Vessel Water Capacty Ltres 8
Expanson Vessel Pre-Charge bar 1
Maxmum Water Capacty n System Ltres 125
CH Temperature Adjustment °C 25-80
DHW Crcut G20 G31
Domestc Hot Water flow rate (ΔT 35 °C) l/mn - -
Maxmum Water Pressure bar - -
Mnmum Flow Rate for Boler Actvaton Ltres - -
DHW Temperature Adjustment °C 35-60
Combuston Specfcaton G20 G31
Gas Rate - Max m/h 2.38 0.92
Gas Rate – Mn m/h 0.37 0.11
C0– Maxmum Power (AUTO CALIBRATION ONLY) %8.7 - 9.2 10 - 10.5
C0– Mnmum Power (AUTO CALIBRATION ONLY) %8.6 – 9.4 10 – 10.5
C0– Ignton Power (AUTO CALIBRATION ONLY) %8.8 – 9.3 10 – 10.5
Mnmum Inlet dynamc Gas Pressure mbar 14.00 37.00
Electrcal Specfcaton
Power Supply V240
External Supply Fuse Ratng amp 3
Internal Supply Fuse Ratng amp 3.15
Electrcty Consumpton W95
Index Protecton IP IPX5D
Electrcal Power Supply Frequency Hz 50
General
Flow Connecton mm 22
DHW Connecton mm 15
Gas Connecton mm 22
Cold Inlet Connecton mm 15
Return Connecton mm 22
Condensate Connecton mm 21.5
PRV Connecton – Copper mm 15
Dmensons (H x W x D) mm 595 x 379 x 260
Net Weght kg 26
Packaged Weght kg 29
Clearances Above Casng mm 200
Clearances Below Casng mm 300
Clearances Front - Operatonal mm 5
Clearances Front - Servcng mm 450
Clearances Rght Hand Sde mm 25
Clearances Left Hand Sde mm 25
Sound Level dB 55
NOx Classfcaton 6

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1.4. PRODUCT IDENTIFICATION
MinerWa 25 System – IE Boiler
1.5. REGULATIONS
• Current Gas Safety (Installation and Use) Regulations
• Building Regulations
• IET Regulations
• Local Water By-laws
It is a legal requirement in Ireland that all gas appliances must be installed
by a competent registered gas engineer, such as Gas Safe and installed in
accordance with all current Gas Safety Regulations.
Failure to install this appliance correctly and safely could lead to prosecution.
This appliance must be installed in accordance with and comply fully to the
current Gas Safety Regulations, IET Regulations, Building Regulations and
local water By-laws.
Buldng Regulatons Part L1A2013 – (new buld dwellngs)
If the installation of our boiler is in a new build property or in an existing
property and it is a first-time installation then the heating system must fully
conform to all current building regulations Part L1A.
This can be an exception for a single-story open plan dwelling where the
living area is more than 70% of the useable floor area, in this case this zone
can be controlled and treated as a single zone.
Individual TRVs can be used on the system also.
For dwellings with a floor area over 150 m2, a separate time and temperature
control for each individual zone is required.
TRVs should also be installed in a minimum of sleeping areas and as best
practice on all radiators with the exception of the room or area where the
room thermostat is installed.
Buldng Regulatons Part L1B 2010 – exstng dwellngs
Where an appliance replacement is to be installed onto an existing heating
system it is not mandatory to zone for an example the ground floor and
1st floor. To ensure compliance it is sucient to install an external control
configuration that complies to the current Boiler Plus e.g. Smart stat, Boiler
Plus compliant room/programmable room stat.
TRVs should also be installed in a minimum of sleeping areas and as best
practice on all radiators with the exception of the room or area where the
room thermostat is installed.

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2. PRE-INSTALLATION
2.1. PACKING CONTENTS
The Warmhaus Boiler is supplied in a box which contains the materials
listed below:
Please return the completed form to customer[email protected] or use the prepaid envelope
provided within 30 days to register your 7 year warranty. * Boiler must be installed with a magnetic filter to
qualify for 7 year warranty. Call 090 6442300 to speak with our Customer Support Team.
Heat Merchants is the Data Controller, all your data will be processed in compliance with the GDPR.
For further details see our data protection statement at www.heatmerchants.ie/privacy
Installer Signature _____________________________________ D ate __________________
Warmhaus Boilers
Warranty Registration Form
Installer Details
Please complete all details below
Homeowner Details
How to
Register?
Privacy
Notice
Installation
Details
This section to
be completed
by the installer
Name ___________________________________
Company Name ___________________________________
Account No ___________________________________
Phone Number ___________________________________
Email ___________________________________
RGI Number ___________________________________
Name ___________________________________
Address ___________________________________
___________________________________
Eircode ___________________________________
Phone Number ___________________________________
Email ___________________________________
Date of Installation _____________________________________
Boiler Serial Number _____________________________________
Magnetic Filter Fitted* Yes  No 
I confirm the boiler has been installed in accordance with manufacturer instructions provided 
www.heatmerchants.ie | 090 6442300 | [email protected]
Office Notes:
1. 2.
5.
3.
6.
4.
7. 8.
1. Flue Outlet
2. Flue Gas NTC Sensor
3. Main PCB Panel
4. CH Flow NTC Sensor
5. Air Gas Mixing Unit (AGM)
6. MMI Touch Control Panel
7. CH Outlet (Flow) Pipe
8. Condensation Water Trap
9. CH Outlet (Flow)
10. Condensate Cleanable Cup
11. Condensate Drain
12. Gas Inlet
13. Flue Condensation Pan
14. Expansion Vessel
15. Main Heat Exchanger
16. Flame Inspection Glass
17. Ignition Electrode
18. Return Pipe
19. Electronic Fan
20. Expansion Tank Air Valve
21. Automatic Air Vent
22. Pressure Switch
23. 3-Bar Safety Valve
24. Electronic Pump
25. Gas Valve
26. CH Drain
27. CH Return Inlet
2.2. APPLIANCE OVERVIEW
MinerWa 25 System – IE Boiler
1. Wall Mounting Template
2. Mounting Bracket
3. Valve Set
4. External Control Relay
5. Warranty Card
6. Hardware Pack
7. Installation/Servicing Instructions
8. User Instructions

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2.3. LOCATION OF BOILER / CLEARANCE

CAUTION
The boiler must be installed on a flat fixed surface which is suitable to
support the weight of the boiler and any ancillaries that maybe required
for the Installation.
Service and maintenance should also be considered when choosing the
location of the boiler unit.
The boiler must not be installed outside
Please follow the below installation points.
• Frost protection: Our boiler has a built in frost protection for the system
water contained within the boiler only, so provisions need to be installed
to protect the system pipe work in unheated areas.
• Accessible: The boiler must be installed in a well lit location that is
suitable for engineers to carry out maintenance on the appliance and for
the customer to safely adjust any controls on the boiler. All roof space
installations should comply to BS5410 part 1 – roof space installations.
• Storage: Do not store any flammable materials around the location of
the boiler or chemicals of any kind.
Installatons n rooms contanng baths or showers
Warmhaus MinerWa 25 System – IE boiler has an IPX5D rating
Any switch or appliance external controls using mains electricity should not
be in reach of any person using a bath or shower.
All installations must be in accordance with all the current regulations and
latest amendments of the IET wiring regulations (BS7671) or in Ireland
Irish Standard IS 10101:2020
595
260
30
55
91
65 50 52 65
90
80
35
67
42,5
1
2
4
9
10
3
87
6
5
DHW
G1/2"
379
201
109
CH
G3/4"
GAS
G3/4"
CH
G3/4"
DHW
G1/2"
Boiler Height : 595 mm Boiler Width: 379 mm
Boiler Depth : 260 mm
Flue Centre: 201 mm (from left side of boiler to flue center)
260 mm
154 mm
595 mm
min.
30
mm
min.
30
mm
379 mm
440 mm
Clearances:
Above : 204 mm Below : 300 mm
Left : 30 mm Right : 30 mm

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2.4. SYSTEM REQUIREMENTS

INFORMATION
The installation of this appliance must take into consideration all prevailing
regulations and codes of practice and the data in this manual.
This instruction manual and the below standards must be adhered to
throughout the installation
Building Regulations.
British Standards.
Irish Standards
Gas Safety Regulations.
Water Supply Regulations,
2.4.1. General

INFORMATION
The system must be to a minimum standard that meets all relevant criteria
and regulations at the time of the installation of this appliance.
All external components must be able to withstand a working pressure of 3
bar and a working flow temperature of 100 °C.
The system must be free of any leaks and in a suitable working condition
for the connection of a new appliance.
2.5. WATER SUPPLY (ONLY FOR COMBI BOILER)

INFORMATION
Appliance use in hard water areas:
In normal operating conditions there is no need to provide any water
treatment to prevent any limescale formation this is because the maximum
temperature of the DHW heat exchanger is monitored and limited by
electronic control.
In areas where the water exceeds 200 ppm it is advised that a scale
prevention should be installed, and you should contact your local water
authority for advice and guidance.
Installations that have non-return or backflow valves fitted on the cold
mains should have a mini expansion vessel fitted between the valve and
the appliance.
2.6. GAS SUPPLY

INFORMATION
The gas installation should be in accordance with the relevant standards. In
GB this is BS 6891 (NG). In IE this is the current edition of IS 813 Domestic
Gas Installations.
The boiler must be installed on a supply from a governed gas meter.
The connection to the appliance is a 22mm copper tail located at the rear
of the gas service cock.
Ensure that the pipework from the meter to the appliance is of adequate
size, and the demands of any other gas appliances in the property are taken
into consideration. Do not use pipes of a smaller diameter than the boiler
gas connection (22mm) UNLESS the stated gas rate can be achieved
with pipe of lesser diameter and with all other gas appliances operating at
maximum rate.
Purging of any pipe work and the appliance must be carried out as outlined
in BS 6891.
2.6.1. By-pass

INFORMATION
The boiler incorporates a bypass by utilizing the primary circuit on the
DHW plate heat exchanger and uses this method as an integral bypass
system and therefore does not require as standard an external bypass fitted
to the system.
2.6.2. Ventlaton

INFORMATION
The boiler does not require any additional ventilation and when installed in a
cupboard or compartment the boiler operates at an adequate temperature
without the requirement for additional ventilation. BS 5440: Part 2 refers
to this in detail.
2.6.3. Prmary system cleanng
Debris in the existing heating system can cause damage to the boiler unit
and cause eciency issues and even void the appliance warranty if the
correct cleaning has not been carried out.
2.7. ELECTRIC SUPPLY


RISK OF ELECTRIC SHOCK
This appliance must be earthed.
This appliance must not be connected to a three-phase supply.
External wiring must be correctly earthed, polarised and in accordance with
relevant regulations/rules. In GB this is the current IEE Wiring Regulations.,
in IE this is Irish Standard IS 10101:2020
The mains supply is 230V ~ 50Hz fused at 3A.
Important:
The method of connection to the electricity supply must facilitate complete
electrical isolation of the appliance.
Connection may be via a fused double-pole isolator with a contact
separation of at least 3mm in all poles and servicing the boiler and system
controls only, alternatively the connection can be made via a fused 3 pin
plug to an un-switched shuttered socket both complying to BS1363
When working on the boiler the electricity must always be isolated and the
correct method of safe isolation must always be followed.
Any external controls connected to the boiler must have at minimum and
valid CE approval and be suitable for connection to the boiler.
Please ensure the correct RCD is fitted the circuit where the boiler is
connected electrically, due to the low energy DC modulating pump fitted
inside the boiler.
If you plan to replace the cable supplied with the boiler for the electrical
connection, please ensure the replacement cable meets the current
standard and it is the correct size and has the correct heat rating.
2.8. PRV DISCHARGE

ATTENTION
The safety discharge pipe must be installed with a minimum pipe size
diameter of 15mm and be in copper or an other suitable material that can
withstand PRV discharge temperatures and pressures that comply with BS
5254 or BS EN 1451.
The PRV discharge terminal must terminate away from any electrical
hazards and terminate where it cannot cause injury to person, it should
terminate with a bend to face the external surface or into a suitable drain
point.
The PRV discharge can be installed into a waste pipe system and all
installations should follow the guidance of BS 6798 sections 6.
Due to maintenance of the PRV we require our copper connection pipe to
be connected to the external PRV pipe work by means of a compression
joint so that in all installations maintenance will be achievable without the
need to cut and re-join copper pipe work.
Where PRV terminations are not possible to visually see e.g. directly into
a waste pipe connection, then a tundish must be fitted so that and water
drips leaking from the PRV can be visually seen and the appropriate action
taken.
Care should also be taken when planning the termination of the PRV due
to the possibility of a slow and steady drip can discharge from the terminal
and if not correctly sited leave the possibility of water freezing when hitting
ground causing an extreme hazard if the frozen water is in the path of a
walk way.

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A Below an openng 300 Check - 2
B Above an openng 300 Check - 2
C Horzontally to an openng 300
D Below gutters, sol ppes or dranppes 75 Check - 1
E Below Eaves 200 Check - 1
F Below balcony or car port roof 300 Check - 1
G From a vertcal dranppe or sol ppe 150
H From an nternal or external corner or to a boundary alongsde the termnal 300
I Above ground, roof or balcony level 300
J From a surface or a boundary facng termnal 600
K From a termnal facng the termnal 1200
L From an openng n the car port nto the buldng 1200
M Vertcally from a termnal on the same wall 1500
N Horzontally from a termnal on the same wall 300
P From a structure on the roof N/A Please see ref AP233
Q Above the hghest pont of ntersecton wth the roof 300
2.9. FLUE TERMINAL POSITION

14 warmhaus.com
3. INSTALLATION
3.1. UNPACKING APPLIANCE

ATTENTION
Our appliance may require 2 people when lifting the boiler to the installation
site and throughout the installation process when lifting and positioning is
carried out.
Installers should be knowledgeable in safe handling techniques and pay
attention and follow all Health & Safety policies put in place by their
company.
Carefully unpack the boiler unit from it’s box and remove the unit from
the polystyrene packaging and dispose of the boiler packaging to comply
with your local waste management guidance.
3.2. APPLIANCE POSITION

ATTENTION
The surface where the boiler is to be mounted must be flat and rigid and be
able to withstand the appliance total installation weight.
Care should be taken on the appliance position and location to ensure the
correct standards are met for the following:
• Flue terminal position and access to flue joints.
• Condensate discharge.
• PRV discharge and termination.
A visual inspection should be carried out to ensure when positioning the
appliance any drilling of the mounting bracket or pipe clips will damage
any electric cables or pipes.
3.3. WALL MOUNTING TEMPLATE
Please ensure you mount the template level before drilling any holes and
ensure you are drilling the correct holes as per the template guidance.
The wall mounting template should be fixed to the desired position on the
surface where the boiler is to be installed, after fixing the template please
set the flue guide on the template to match your desired flue position.
Drilling of the fixing holes for the mounting bracket can also be done as per
the guidance on the wall mounting template.
The template also displays the
pipe centers and correct pipe
work layout for the correct
installation of the boiler pipe
work.
3.4. PREPARING THE WALL – DRILL FLUE HOLE

ATTENTION
When drilling the flue hole ensure that any falling masonry debris will not
cause an injury to person or damage to property, please make sure both
surfaces when drilled are flat and free of debris.
We recommend using a 125 mm core drill attachment to drill the flue hole,
this will give you some tolerance if required when positioning the flue.
3.5. INSTALLING MOUNTING BRACKET

INFORMATION
We suggest when drilling the holes for the mounting brackets you drill
holes that can accommodate 7.5 mm / 8 mm plastic raw plugs and that the
minimum fixing screws are No 10 x 50mm and ensure when the mounting
bracket is fixed it is level.
Ensure you make a minimum of 2 fixing points to be drilled to ensure
correct fixing of our mounting bracket.
Please ensure the mounting bracket is fixed in the correct orientation with
the two hanging points facing in an upwards direction.
16-) Mounting Bracket
3.6. HANGING THE BOILER

INFORMATION
Ensure that all the plastic safety plugs are removed from the CH and DHW
(for combi boilers only) inlet and outlet connections at the bottom of the
boiler.
Note that the boiler may contain some residual water when the plugs are
removed so care should be taken for this.
Taking all lifting techniques into consideration lift the boiler and locate it
over the two fixing tabs at either side of the mounting bracket.
Make sure the boiler is correctly
located on the mounting bracket
and that the boiler is level and
straight.

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3.7. APPLIANCE CONNECTIONS
Part No Part Name
1 230 V AC Main Supply
2 Pressure Relief Valve Outlet
3 Gas Inlet
4 Central Heating Flow (Ch)
5 Central Heating Return (Ch)
6 Drain Point
7 Condensate Drain
The Warmhaus Minerwa boiler is supplied with a hardware pack containing
isolation valves and a connector pipe for the installer to connect to the
boiler unit.
The hardware pack supplied is:
• Flow – 22 mm isolation valve (compression)
• 2 x Copper end feed adaptor 22 mm to 3/4”
• Gas – 22 mm isolation valve (compression)
• Return – 22 mm isolation valve (compression)
• 1 x Copper end feed adaptor 15 mm to 1/2”
PRV – 15 mm copper stub pipe – THIS CONNECTION SHOULD BE MADE BY
A SUITABLE COMPRESSION TYPE FITTING.
The condense connection is made with a flexible hose supplied with the
boiler as per the above image

16 warmhaus.com
3.8. FILLING APPLIANCE & ADDING INHIBITOR
FILLING THE SYSTEM

ATTENTION
Ensure the system has been cleaned following the guidance of BS 7593 and
that all existing and installation debris is removed.
The primary heating circuit must not be filled with artificially or salt based
softened water it must be filled with an untreated cold supply from the
cold water main.
The filling loop must be WRAS approved and not be a permanent
installation (see below image)
If there is an additional expansion vessel fitted on the circuit, please ensure
the charge pressure is the same as the boiler vessel (0.75 bar).
If the filling link is located away from the boiler then ensure a pressure
gauge is located next to the filling link to ensure correct filling pressure.
The filling loop should always be removed, and suitable caps fitted to the
valves after filling the system has been carried out.
ADDING INHIBITOR

CAUTION
The inhibitor used in the system with your Warmhaus boiler must not cause
damage to any materials within the boiler e.g. stainless steel, copper, brass
and any other composite material.
If the boiler is installed in areas such as leisure accommodation, then the
inhibitor must incorporate an anti-freeze solution or the anti-freeze solution
can be added separately but must be suitable for the boiler materials as
above.
We advise that the PH level of the system water should be between 6 -8
and any chemicals added must not change this.
When the inhibitor is added please record this with a label (if the inhibitor
manufacturer supplied this) or with a suitable method so that the
installation date can be monitored for service.
Inhibitor levels should be monitored and checked on service/maintenance
visits to confirm the system has the correct dosage.
Always add the specified dosage given by the inhibitor manufacturer and
do not mix inhibitors by dierent manufacturers.
Caution should be taken when disposing of all containers from the inhibitor
after installation.
If there is any doubt on the suitability of the inhibitor you wish to use then
please consult Warmhaus technical before adding to the system.
3.9. INSTALLATION WITH HORIZONTAL FLUE SETS
Connecting Horizontal Concentric Flue Set to the System Boiler, (original
diameter DN 60/100 mm)
Since your boiler is hermetic model, it takes the used air from exterior
and discharges exhaust gases created as the result of burning through
the same flue group. In order to prevent emission of excessively harmful
exhaust gases, flue usage and installation is very important, therefore
warnings should be taken into consideration when flue connections are
being performed.
A1. 90° elbow
2. Inspection Cap (Gas)
3. Inspection Cap (Fresh Air)
4. Screws
5. Flange Gasket
6. Flange Gasket Screw
7. Neoprene Gasket
8. Ø100 Sealing Gasket
9. Ø60 Sealing Gasket
10. Centralizer
11. Internal Flue Pipe
12. Internal Flue Pipe
13. Internal Wall Plate
14. External Wall Plate
15. Grill
• Make required flue selection for the flue connection to be made external
and installation place of the system boiler. If the standard flue set is not
adequate, please select most suitable elements from our list of connection
accessories.
Figure XX Hermetic system
boiler concentric flue set.

17
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• Loosen the Flange Gasket Screw (6) and remove it from the elbow (1)
• Put the Neoprene Sealing Gasket (7) under the flange and secure it with 4
screws (6 and see Picture A)
• Place the flue elbow (90°) (1) press down and tighten the screw (6) to
secure the flue elbow (see picture B)
• Fit the outer and inner wall flanges (13-14) on the terminal pipe (12)
• Connect flue to the boiler, positioning the seals correctly (picture C). Seal
the flue into the wall with silicone or sand + cement and cover with Wall
Seals provided.
• It is important that the flue terminal must have an horizontal sloping not
less than 1,5 deg. (25 mm per meter) towards the boiler.
3.10. INSTALLING THE FLUE SYSTEM
Apply a suitable lubricant to the sealing joints before connecting any flue
products and ensure the horizontal flue terminal is installed level without a
slope.
The flue pipe must be sealed internally and externally with the wall seals
supplied.

During installation of horizontal pipes, the pipe slope should be
kept at 3% upwards as minimum and at every 3 meter holder
clamps should be used with dowels.
60/100 mm Concentrc flue systems nformaton
Only approved Warmhaus flue systems can be connected
to our appliance and no other flues have been tested or
approved to work with any Warmhaus appliances – see
below our list of standard products:
Concealed Flue Configurations
Where our Warmhaus flue system is to be
installed in concealed locations provisions must
be made for inspection and service
requirements.
• Minimum 300 mm square inspection hatches must be fitted.
• The inspection hatch edge must not be fitted more than 1.5 meters away
from a flue joint
• Inspection hatches should be fitted at every change of direction.
Flue Data
60/100mm Concentric flue systems information
Warmhaus flue pipe technical specification:
Horizontal Termination:
• Maximum length = 10 meters including the bend or adaptor connected
directly to the boiler.
• Extensions installed horizontally must have a 3% slope fitted back to the
boiler.
• Eective flue length for the following:
Bend Equivalent To Straight Length
45 Degree 0.5 meter
90 Degree 1.0 meter
Figure XX Single 90° bended sample flue installation
Figure XX
Installation of
flue set pieces.
Figure XX
Hermetic system
boiler concentric flue
wall output.
Figure XX
Condensing
combi boiler flue
training

18 warmhaus.com
a- Standard Flue Set Elbow (90°)
b- Flue Extension Pipe
c- Additional 90° Elbow
d- Standard Flue Set Pipe
Figure XX Two 90° elbow sample flue installations
Total length of hermetic flue set should not exceed 10 m with single elbow
horizontally. Also, this total length reduces by 1 m with every 90° elbows or
two 45° elbows. Maximum 3 pieces of 90° elbow can be used.
a- Standard Flue Set Elbow (90°)
b- Flue Extension Pipe (L1)
c- Additional 45° Elbow
d- Standard Flue Set Pipe (L2)
e- Additional 45° Elbow
f- Standard Flue Set Pipe (L3)
Figure XX. Single 90° and two 45° elbow sample flue installations

CAUTION: When it is required to shorten the discharge flue and/
or extension, consider that internal pipe should protrude 5 mm
when compared with the external pipe.

CAUTION: For security purposes, system boiler suction /
discharge flue should not block even temporarily.
3.11. INSTALLATION WITH VERTICAL FLUE SETS
(Ø60/100 MM)
Your system boiler can also be vertically connected to flat and aslope roofs
via available connection accessories depending on the status of installation
place. For flat connections (Ø 60/100 mm) vertical flue set should not
exceed 11 m.
Apply a suitable lubricant to the sealing joints before connecting any flue
products and ensure the vertical flue terminal is installed level without a
slope.
The vertical flue terminal can be fitted to both flat and pitched surfaces.
Flue Data

WARNING
Warmhaus flue pipe technical specification:
Vertical Termination:
• Maximum length = 11 meters including the bend or adaptor connected
directly to the boiler.
• Eective flue length for the following:
Bend Equivalent To Straight Length
45 Degree 0.5 meter
90 Degree 1.0 meter
Figure XX Vertical flue set installation

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Detail A: Waste gas vertical outlet chimney set and Pitched Roof Outlet Tile
part installation for Roof

INFORMATION: The vertical flue terminal can be fitted to both flat
and pitched surfaces.

ATTENTION: For C3 boilers the terminal outlets from separete
combustion and air supply circuits shall fit inside a square of 50
cm and that the distance between the planes of the two orifices
shall be less than 50 cm.
Detail A: Waste gas vertical outlet chimney set Roof insulation and chimney
transition part
Figure XX Vertical flue set installation application.
Implementation:
L1 = 0.3 m
L2 = 0.5 m. (45° bend equivalent length)
L3 = 2.0 m.
L4 = 0.5 m. (45° bend equivalent length)
L5 = 1.0 m.
L6 = 1.5 m.
L Total =6.3 m. 6.3 m. < Lmax = 11 m.
Correct in implementation.
A

20 warmhaus.com
Product Name Product Code
(Ø60/100) Condensng Concentrc Horzontal Flue Set
L=1620 mm [LTerm. + LExt.ppe+LAdapter=1000+500+120]
Extenson Parts:
(Ø60/100) Condensng Flue Extenson, LExt.ppe=500 mm,
(Ø60/100) Condensng Vertcal Adapter, LAdapt.=120 mm
153.11.014.000008 (Black)
153.11.014.000002 (Whte)
153.11.014.000009 (Grey)
(Ø60-100) Condensng Vertcal Flue Set wth Adapter
LPpe+Adapter=1000+148=1148 mm
153.11.660.600109 (Black)
153.11.660.600013 (Whte)
153.11.660.600116 (Grey)
(Ø60/100) Condensng Flue Extenson
L=500 mm
153.11.660.600110 (Black)
153.11.660.600014 (Whte)
153.11.660.600117 (Grey)
(Ø60/100) Condensng Flue Extenson
L=1000 mm
153.11.660.600111 (Black)
153.11.660.600015 (Whte)
153.11.660.600118 (Grey)
(Ø60/100) Condensng Flue Extenson
L=2000 mm
153.11.660.600112 (Black)
153.11.660.600016 (Whte)
153.11.660.600119 (Grey)
(Ø60/100) Condensng
45° Elbow
153.11.660.600113 (Black)
153.11.660.600017 (Whte)
153.11.660.600120 (Grey)
(Ø60/100) Condensng
90° Elbow L=170 mm
153.11.660.600114 (Black)
153.11.660.600018 (Whte)
153.11.660.600121 (Grey)
(Ø60/100) Condensng
Vertcal Adapter
L=130 mm
153.11.660.600115 (Black)
153.11.660.600019 (Whte)
153.11.660.600122 (Grey)
Flat Roof Outlet Part
153.11.660.600124
Ptched Roof Outlet Tle A = 500 x 500 mm
153.11.660.600125
3.12. CONCENTRIC FLUE KITS FOR CONDENSING BOILERS (Ø60/100 MM)