Morco EUP11 Operating instructions

EUP11
Instantaneous gas water heater
User, Installation and Maintenance Manual

2
This appliance is certified to be placed in the following countries in relation to gas type and pressures:
-Cat. I3+ (G30/G31 Butane/Propane @ 28-30/37 mbar): Belgium (BE), Spain (ES), France (FR), Great Britain (GB), Italy (IT), Ireland (IE).
-Cat. I3P (G31 - Propane @ 37 mbar): Belgium (BE), Spain (ES), France (FR), Great Britain (GB), Italy (IT), Holland (NL), Ireland (IE).
-Cat. I3B (G30 Butane @ 30 mbar): Belgium (BE), Spain (ES), France (FR), Great Britain (GB), Ireland (IE).
-Cat. I3P (G31 Propane @ 50 mbar) Germany (DE), Austrian (AT)
The appliance complies with the Regulation (EU) 2017/1369 setting a framework for energy labelling.
The energy label carries the information regarding the product’s energy efficiency characteristics.
In this way the end consumer can identify and compare similar products and can make informed choices regarding high efficiency
appliances.
PRODUCT DATASHEET
Morco
EUP11
Declared load profile
M
Indoor sound power level dB(A) 62
Water heating energy efficiency class
B
Water heating energy efficiency class %58
Annual fuel consumption
GJ 8
Annual consumption of electric energy
kWh 0
Nitrogen oxide emissions (G30-G31)mg/kWh 61-20
The device is well built in accordance with the current legislation.
The CE sign positioned on the product indicates that it conforms to the following European Directives:
•Regulation Gas Appliance (UE) 2016/426
•European Standard: gas-fired instantaneous water heaters for the production of domestic hot water
EN 26:2015
•Directive 2009/125/EC Ecodesign requirements for energy-related products
•Regulation (EU) 2017/1369 setting a framework for energy labelling
•Delegated regulation (EU) no. 812/2013
•Delegated regulation (EU) no. 814/2013

3
Gas Safety (Installation and Use) Regulations 1998
In the interest of safety, it is the law that all gas appliances are installed and serviced by a competent person in accordance
with the above regulations, building regulations, codes of practice and byelaws of the local water authority.
Failure to comply with the regulations may lead to prosecution. It is in your interests and that of your safety that the law is
complied with.
Related documents
The following British Standards, Codes of Practice and other Regulations must be observed in the installation of the water
heater.
The Gas Safety Regulations (Installation and Use) 1998
The Model Water Byelaws
Byelaws of the Local Water Undertaking
The Building Regulations (Permanent Buildings) England and Scotland.
BS 5482 Part 1 Installations in Permanent Dwellings
BS 5482 Part 2 Installations in Caravans and Non-Permanent Dwellings
BS 5482 Part 3 Installations in Boats
BS EN 1949 Installation of LPG System for Habitational Purposes in Leisure Accommodation Vehicles
BS EN 721 Leisure Accommodation Vehicles - Ventilation Requirements
BS EN ISO 10239 2008 Small Craft LPG Systems
CONTENTS
GENERAL SAFETY WARNINGS page 4
DESCRIPTION OF THE APPLIANCE page 4
1OPERATION page 5
1. a Function page 5
1. b Usage page 5
2TECHNICAL CHARACTERISTICS page 8
2. a Technical Data page 8
3INSTALLATION page 9
3. a Regulations page 9
3. b Wall mounting page 9
3. c Room ventilation page 9
3. d Gas Connection page 9
3. e Water connection page 10
3. f Flue gas page 10
4MAINTENANCE page 11
4. a Removing the casing page 11
4. b Troubleshooting: Problems and solutions page 11
FOR THE ENGINEER
Starting up the appliance and final checks page 12
WINTERISATION page 13
WARRANTY page 14
WARNING
This booklet contains information relevant to the user as
well as the installer.
When the product has reached the end of its
serviceable life, it shall be disposed of in an
environmentally friendly way and disposed of
according to the regulations in force.
Separate collection and recycling of the product
avoid negative impact for environment and health,
and allows recovery of materials, in order to obtain
energy and resources saving.

4
GENERAL SAFETY WARNINGS
The User, Installation and Maintenance Manual is an integral part of the
product and so must be carefully preserved in order to accompany
the product; if it is lost or damaged another copy can be requested
from Morco Products Limited on 01482 325 456 or visit our website
www.morcoproducts. co.uk.
The installation of the device and any other repairs or
maintenance must be performed by a Gas Safe Engineer or
other qualified personnel according to the law in force, in
compliance with the installation regulations including any
revisions.
A Gas Safe Engineer or other qualified personnel must
commission this device.
The device must be used according to the manufacturer
specifications. The manufacturer cannot be held
contractually or otherwise responsible for damage caused to
persons, animals or objects as a result of incorrect
installation, repair or maintenance or improper usage.
The product’s safety or automatic regulation devices must
not be modified unless performed by the manufacturer.
This device is intended for heating water and therefore must
be connected to a water distribution network whose flow and
pressure are compatible with the product.
If water leaks are observed, turn off the water supply and
advise a Gas Safe Engineer or other qualified personnel.
If the appliance is not used for prolonged periods turn off the
gas supply. If there is a risk of the water freezing, empty the
water heater. Please see “frost and freezing” on page 5.
If the machine breaks down or does not function properly,
deactivate it, do not attempt to perform any repairs and
contact a Gas Safe Engineer or other qualified person.
The appliance should be maintained at least once a year.
When the product has reached the end of its serviceable life,
it shall be disposed of in an environmentally friendly way;
ensuring that the majority of the product is fully recycled.
When using the device the following safety rules must be applied:
Do not use the machine for purposes other than those
intended by the manufacturer.
Do not block the intake, flue or the ventilation openings in
the area where the device is installed with
rags, paper or any other materials.
If a gas leak is detected, do not switch on any electrical
devices, telephones or any other objects that could produce
a spark. Ventilate the area by opening the doors and
windows and switch off the gas supply.
Do not place objects on top of the device.
Do not leave flammable containers or substances in the
area where the device is installed.
Children or inexperienced persons should be prohibited from
using the device.
DESCRIPTION OF APPLIANCE
The Morco EUP11 is an open flued 11 litre instantaneous gas water heater. The air for combustion comes from the external
vents in the cupboard that the heater is placed in and hence very careful attention must be paid to providing sufficient
ventilation. See section 3.c. Room Ventilation. The appliance is suitable for use in dedicated boiler cupboards in caravan
holiday homes. We do not recommend this appliance for use outside of a dedicated cupboard or in boats, motorhomes or
rooms in which habitation takes place. The appliance relies on a pilot flame to ignite the main burner once a hot tap is
opened. The appliance does not store hot water. The flow of the water through the appliance can be adjusted from 5.5 to 11
litres per minute and this corresponds to the temperature of the incoming water being increased by 50°C or 25°C
respectively. This adjustment is made via the water temperature adjustment knob and during winter months it is advisable to
move the knob fully anticlockwise to ensure hot water of an acceptable temperature.
In parts of the manual the following symbols are used:
WARNING = for actions that require caution and adequate preparation
PROHIBITED = for actions that MUST NOT be performed
The water heater package contains:
2 Two knobs to attach to the control panel after
installation
1 Water filter to insert in the water valve pipe
fitting

5
1. OPERATION
1.a. Function
The water heater is designed to produce instantaneous hot water. The hot water is delivered to several outlets around the home. If more
than one outlet is used at any one time the delivery of hot water will be reduced at each outlet. The Water heater has 2 main controls:
- A gas control knob - “A” in fig 1
- A water temperature control knob – “B” in fig 1
The minimum gas level in fig. 1 will provide approximately 50% of the available power. Turning the gas control knob counter- clockwise will
increase the power level between 50% and 100%. This function may be useful to vary the temperature of the water supplied.
The water temperature selector allows water to be supplied anywhere between 50% and 100% of the water heater’s capability. In effect the
selector reduces the water flow through the heater to the taps to increase the water temperature and correspondingly increases the water
flow to reduce the water temperature.
In the UK the normal positions for the controls are:
- Gas control – always set to 100% (fully counter clockwise)
- Water control set to 100% (fully clockwise) during the winter months
- Water control set to between 100% and 50% during the summer months to suit the customer’s preference for hot water temperature
1.b Usage
Ensure that the appliance gas isolation valve and all water taps are switched off
- Turn on the main external gas supply on the bottle or tank
- Light other gas appliances such as the cooker hob or fire and allow them to run for 30 seconds- this is to purge the gas system of air
- Open the appliance gas isolation valve, placed immediately below the water heater on the gas input pipe
- Rotate knob A to the on position (), press the knob down all the way and keep it pressed
- Press the piezo electric button that is located under the water heater on the left-hand side until the spark ignites the pilot flame. The flame
can be seen through the viewing window on the front of the heater. When it ignites, keep the gas control knob (“A” in fig 1), pressed for
20-30 seconds. If the pilot does not stay lit when the knob is released, repeat the procedure
- Rotate Knob A towards the large flame ( ), during rotation it is necessary to keep the knob pressed down lightly until the final position
is reached
- From this moment the device is able to produce hot water on request. Opening the hot water tap causes the main burner to be ignited,
and inversely, by closing the hot water tap the main burner is switched off; but the pilot flame remains switched on for future requirements
- If the main burner or pilot flame is accidentally turned off, the gas valve automatically blocks the output of gas within 60 seconds so to
avoid any danger. To return the device to an operational mode, repeat the steps above
The machine is switched off by rotating knob A to the OFF position (●).
When the water heater is not used for long periods close the appliance gas isolation valve or the LPG gas valve on the bottle/tank.
For the best operational results it is recommended to have a Gas Safe Engineer or other qualified personnel service the machine at least
once a year.
PRECAUTIONS TO BE TAKEN AGAINST FROST AND FREEZING CONDITIONS
If there is a possibility that the area where the appliance is installed could reach below 0°C, the device must be emptied of all water.
During cold spells, if your appliance is located in a place exposed to frost and freezing conditions, it must be drained down in the following
way:
- Turn off the home’s water inlet stop tap.
- Disconnect the water supply pipe from the home
- Open any drain cocks located on the hot/cold water pipework under the home
- Turn on all hot and cold water taps
- Turn appliance water temperature selector fully anticlockwise
- Disconnect the cold water inlet to the water heater
- Full details of winterisation can be found under “troubleshooting” at www.morcoproducts.co.uk
- A summary can be found on page 13 of this manual
To use the appliance again reverse the above procedure
maximum gas level
B = Water temperature selector
fig. 1
B
A = Gas control on/off
●off position
activation position
minimum gas level
A

6
Fig. 2
11
A592
B (Ø)
110
C101
D245
E314
F97
G
54
H
83

7
fig. 3
1
Combustion products safety sensor
2
Flue diverter hood
3
Heat exchanger
4
Burner
5
Water control assembly
6
Water temperature adjustment knob
7
Gas valve
8a
Gas Inlet point
8b
Burner pressure test point
9
Gas input
10
Gas adjustment screw - should not be adjusted
11
Piezoelectric pilot ignition button
12
Gas adjustment knob
13
Pilot burner
14
Ignition electrode
15
Hot water limit thermostat

8
2. TECHNICAL CHARACTERISTICS
2.a Technical Data
11
kW - kcal/h
Nominal power usage (Pn) 19,4 - 16.665
Nominal Thermal range (Qn) 21,7 - 18.662
Minimal power usage (Pm) 9,6 – 8.260
Minimal Thermal range (Qm) 10,8 – 9.288
GAS TYPE
BUTANE
PROPANE
G30
G31
P.C.I. (15° C 1013 mbar) MJ/m3116,09 88
WI (15° C 1013 mbar) MJ/m380,58 70,69
Consumption kg/h 1,711,69
Burner Pressure mbar 26,40 35,10
Nr/Ø main burner injector Nr/mm 18x0,48+6x0,50
Ø pilot flame injector mm 0,23
Ø gas connection
1/2”
Flue gas load (max-min) g/s 11,80-9,75 12,48-10,29
Flue gas temperature (max-min) °C 157-110 173-118
BE – FR – GB – IE – IT - ES
Category - Nominal feed pressure I3+ - G30: 28/30 mbar G31: 37 mbar
BE – FR - GB – IE – IT – ES - NL
Category - Nominal feed pressure I3P - G31: 37 mbar
DE- AT
Category - Nominal feed pressure I3P - G31: 50 mbar
BE – FR - GB – IE – ES
Category - Nominal feed pressure I3B - G30: 30 mbar
WATER
11
Input range l/min Minimum 5
l/min
Maximum
10.8 l/min
Water temperature lift °C approx. 50 approx. 25
Minimum pressure bar 0,2
Nominal pressure bar 2
Maximum pressure bar 10
Ø Water connections
inch
1/2”
Ø flue spigot diameter mm 110
DIMENSIONS AND WEIGHTS
DEVICE
PACKAGE
Height mm 592 655
Length mm 314 361
Depth mm 245 280
Weight Kg 10,60 11,80
Note: relative cold water temperature of 15 °C

9
3. INSTALLATION
3.a Regulations
The use of gas devices is controlled by precise regulations.
Installation of liquified petroleum gas (L.P.G) must comply with all
the manufacturer’s requirements and those of the regulations.
3.b Wall mounting
Warning
Do not install this device in an area that contains dust, greasy
vapour and/or corrosive elements.
- The device must be installed on a suitable wall surface that
allows the fitting of a vertical exhaust gas flue
- It is vital to leave the minimal distances around the device as
shown in fig 4 to allow for maintenance operations to take place.
Location
The water heater requires a plentiful supply of fresh air for correct
operation. Fixed ventilators or air inlets should not be obstructed.
Do not install the water heater in a location where incomplete
combustion is foreseeable such as bathrooms or bedrooms unless
specifically allowed by national legislation.
The minimum low and high level free ventilation areas are stated
on this page and must be observed.
The water heater must be fixed to a load bearing wall in a vertical
plane.
3.c Room ventilation
The installation of the water heater must comply with regulations in
force including any updates. See page 3
Warning: This device can only be installed in venues that are
permanently ventilated according to regulation in force.
• COMBUSTION GAS REMOVAL
A single wall vertical flue pipe of Ø110mm must be used and when
it passes through combustible materials, a metal sleeve of
Ø170mm must be used to allow an air gap of 25 mm. Part code
FTFCTG101.
Flue pipes and terminals should comply with BS 715. Terminals
shall not be sited within 300 mm. of a ventilator or open window. In
the U.K. full details of flueing requirements are given in BS EN 1949.
The overall length of the flue must be 600mm from the bottom of
the terminal louvres to the top of the water heater. At least 250mm
of this length must be external to the roof through which it is fitted.
• AIR SUPPLY FOR COMBUSTION
Air requirements: Reference is made to BS 5482 (BS EN 1949) and
EN 721 covering ventilation requirements for permanent dwellings,
caravans and boats.
Fixed ventilation should be provided to avoid draughts as far as
possible without impairing the free area of ventilation, even in ad-
verse weather conditions. If the heater is positioned in location
which may be subjected to strong draughts i.e. close to a window
or opening then strong draughts or gusts of wind may extinguish the
pilot.
All permanent openings for ventilation should be designed to pre-
vent the entry of vermin. Where screens are provided, they should
not have apertures of less than 6 mm. or greater than 9 mm. in any
direction, and they should be accessible for cleaning. Fine mesh screens
shall be avoided as they are liable to become blocked with dust.
The location of vents and the method of cleaning them should be
stated in the Owners Handbook (Caravans and Boats).
As a guide, the minimum effective free area of vents is stated below
in connection with this water heater. Additional appliances burning
gas in the same area would require additional ventilation.
If the appliance is installed in an enclosed cupboard in a Caravan
Holiday Home the required ventilation is that specified in BS 5482
part 2 and BS EN 1949, i.e. 10 cm² per kilowatt input rating divided
between high and low. Each of the high and low vents should
therefore be 109 cm² of free area.
3.d Gas Connection
The water heater should be connected to the gas supply via a
15mm diameter copper gas pipe. A gas isolation valve must be fit-
ted to the gas inlet on the water heater.
When installing or commissioning the water heater the following
must be observed:
- The diameter of the gas pipe between the supply bottle or tank
must be in accordance with the regulations in force
- The regulator size and pressure specification are correct for the
application
- The correct gas (LPG) is being supplied
- All the required gas pressure and tightness tests are carried out
as part of the commissioning process.
- Gas joints downstream of the magnetic gas valve must be
checked with leak detection fluid while the heater is running
- Gas jointing paste should not be used when connecting the gas
isolation valve
Do not obstruct the area’s ventilation openings where the device is
installed to avoid dangers such as the build-up of toxic and explosive
gases.
ATTENTION: if the appliance is supplied with G31@50 mbar,
remove the protective cap (pos. 10 water heater components pag.
7) and regulate the pressure screw so that the burner reaches the
pressure indicate in the technical data.
fig. 4

10
3.e Water connection
Connect the water heater to the water supply.
From the front, the cold water input is on the right and the hot water output is on the left.
Insert the filter into the water valve input fitting.
Remove the plastic cap from the water outputs fitting before connecting it to the water supply.
3.f Flue Gas
For output of flue gases refer to the regulations in force including
any updates. See page 3.
The water heater must be connected to a suitable flue terminal. The
following must be observed:
- The flue must be installed vertically – through the roof of the
holiday home
- The diameter of the flue terminal must match that of the water
heater (110mm)
- The overall flue length from the top of the water heater to thetop
of the external flue must be at least 600mm. The distance from
the external roof surface to the top of the external flue must be at
least at least 250mm.
Flue gas safety device
This product is equipped with a flue gas safety device. The device
ensures the flue gases leave the water heater safely via the flue. The
flue safety device marked as 2 in Fig.6 is a flue gas safety device
thatwill interrupt the flow of gas to the water heater burner and pilot
light in the event that there is a total or partial blockage in the flue
that does not allow the flue gases to leave safely. The device will also
operate if the design or length of the flue is not correct. This stat will
reset when it has cooled down due to the technical issue being resolved
thus allowing the water heater to operate as normal.
If the flue gas safety device is faulty it will need to be replaced
before the water heater will function again. The stat must not be
removed or altered in any way otherwise the operation of the water
heater may become dangerous.
1Flue diverter hood
2Flue gas safety device
3Hot water limit thermostat
4Heat exchanger
5Burner
6Ignition electrode
7Thermocouple
8Pilot burner
9Main burner injectors
10 Hot water output
11 Burner pressure test point
12 Water temperature
selector knob
13 Venturi
14 Water control assembly
15 Magnetic valve
16 Water filter
17 Diaphragm
18 Cold water input
19 Gas adjustment knob
20 Gas valve
Fig. 6

11
4. MAINTENANCE
To maintain the machine at maximum efficiency, have Gas Safe
Engineer or other qualified personnel perform a maintenance
check at least once a year.
Before cleaning or performing maintenance, opening or
disassembling the panels, switch off the device and turn off the gas
supply. Check the main burner and the pilot flame, the ignition
electrode, the safety valve and that there is no gas or water
leakage. Check that there is nothing obstructing the passages
within the heat exchanger or flue.
To clean the outside of the panels utilize a cloth with soap and
water. Do not use solvents, powders or abrasive sponges.
Do not clean the device and/or its parts with flammable materials
(e.g. petrol, alcohol, diesel etc.).
4.a Removing the casing
To remove the outer casing follow the steps below:
- Remove the selector knobs (A and B)
- Remove the screws (C)
- Shift the casing upwards to free it from the upper and lateral hooks
- Shift the casing forwards
- To reinsert the casing, follow the above steps in reverse order.
4.b Troubleshooting: problems and solutions
For the best functioning of the water heater, to prolong its lifetime
and ensure that it is always safe, it should be inspected at least once
a year by a gas safe engineer. The gas safe engineer is to perform
the following maintenance operations:
- Remove any rust from the burner
- Remove any deposit from the electrodes
- Clean the combustion chamber
- Check the ignition, switching off and general functionality of the
appliance
- Check that the gas and water pipes and connections are sealed
Warning: the following repair instructions are only to be performed
by Gas Safe Engineers or other qualified personnel.
PROBLEM CAUSE SOLUTIONS
There is no spark - appliance spark wire is disconnected - reconnect
- piezoelectric mechanism broken
- the electrode is damaged
- test, replace
- replace
The pilot does not switch on when
there is a spark
- pilot injector blocked - clean by immersing in solvent or replace
- electrode activation position needs
changing
- adjust
- no gas supply - open the appliance gas isolation valve
- air in the gas tubes - purge air by turning on all gas rings on hob
for 30 seconds
The pilot does not stay on - thermocouple faulty - replace
- broken magnetic valve - replace
Pilot on but the main burner does not
ignite
- insufficient water pressure
- Increase the external water supply
pressure
- rotate the knob B counter clockwise
- the diaphragm is broken - replace
The burner does not switch off when
the water turns off
- contamination on the gas valve seat - test, clean
- gas valve push rod is locked in the open
position
- Check the correct operation of the cold
water push rod , dis-assemble, clean or
replace
- check the gas pressure - if the inlet gas pressure exceeds the
specification replace the pressure
regulator on the external bottle or tank
Delayed burner activation - pilot burner flame is too far from main
burner flame or it is too short
- check inlet gas pressure, clean injector and
pilot burner
The heat exchanger fins becomes
sooty in a small amount of time
- poor draught, adverse weather conditions
or dusty surroundings
- check the flue installation
- yellow flame - check the gas type and clean the burner
- excess gas consumption - check gas pressure and adjust
fig. 7

12
FOR THE ENGINEER
STARTING UP THE APPLIANCE AND FINAL CHECKS
Start the appliance by following the directions given in section 1b,
“Usage”, checking that the appliance is working correctly. Pay
special attention to the colour of the flames ensuring there is no
yellow- ness which would indicate burner venturis blocked by insect
matter.
Check the gas operating pressures with the heater under full power
at the inlet pressure nipple located on the right hand side of the gas
body valve stem. The pressure drop should not exceed 2.5 mb
below that specified in this manual.
Check the burner pressure with the heater at full load at the test
nipple located on the left hand side of the main gas valve body be-
low the main burner. These pressures must at least be equal those
specified in this manual in order to achieve the desired performance
specified in this manual.
These gas water heaters are set in the factory for use with the gas
they are intended to burn. The gas for which each appliance is set
is indicated on the packaging and on the data plate of the heater
itself
Check the flue for spillage: close all the doors and windows in the
room containing the water heater. If there are any fans or extractors
in the room then these must be turned on full. Light any otheropen
flued appliances such as fires of gas hobs. Turn the water heater
on by opening a hot tap on full burn and run for 5 minutes to allow
the flue to warm up.
Hold a smoke match to the side of the opening of the draught diver-
tor using an extended holder, making sure that the end of the match
is located centrally in the draught divertor.
The smoke should be pulled up the flue and not back into the room.
If spillage is detected, run the appliance for a further 10 minutes and
then repeat the test. If spillage is still detected then check the flue
for blockages, check that the correct flue terminal is fitted and that
the correct ventilation is fitted at a low and high level. Also check
the ventilation has not been blocked.
A.2.3. - LOOKING AFTER THE APPLIANCE
• PRECAUTIONS
– Against furring up (lime scale)
If the appliance is installed in an area with very hard water, with
time, the following may occur:
– A fall in the hot water temperature, or
– A reduction in the hot water flow.
This means that the heat exchanger may be furred up, creating the
above situations
Note: De-furring/descaling should be carried out using proprietary
agent or dilute hydrochloric acid. It is recommended to circulate the
descaling fluid around the heat exchanger in order to speed up the
process.
• MINIMUM ANNUAL MAINTENANCE
Gas water heaters are rugged pieces of equipment which are
designed to work for a long time with minimum maintenance
requirements. The only regular maintenance required is the
(annual) cleaning of the heating body and the burner. If the appliance
is installed in a caravan it is advised that this is done at the
beginning of each season.
• CLEANING THE MAIN BURNER
To carry out the annual cleaning of the burner, proceed as follows:
– Turn off the gas supply, remove the cover and remove the burner.
– Clean the surface of the burner heads gently with a brush and
vacuum cleaner. Then blow through them to remove any particles
of dust loosened du- ring the brushing operation.
– Check the venturis in the main burner for contamination
from insects and spiders webs.
• CLEANING THE HEAT EXCHANGER
To carry out the annual cleaning of the heating body, proceed as
follows:
– Turn off the gas supply
– Turn off the supply of water to the appliance by turning off the
appliance water supply.
– Turn on all the hot water taps to empty all the pipes.
– Remove the heating body and clean it by gently brushing the fins.
Soot, if found, should be removed by washing, and the cause of
the sooting investigated.
• CLEANING THE PILOT
If the pilot light flame is yellow and the safety valve takes a long time
to open, this means that either the pilot injector or pilot burner is
partially blocked.
The pilot injector may be blocked with contaminants carried within
the gas, whilst the pilot burner is more likely to be contaminated by
insects (spiders / egg sacs)
N.B. No attempt should be made to clear blocked or partially
blocked pilot injectors by using wire. If blowing through the injector or
immersing in solvent fails to clear the restriction, then a new injector
should be fitted.
When the pilot is working normally the flame should be a stable blue
coloured cone shape. To clean the pilot burner, proceed as follows:
– Turn off the gas supply, remove the front cover. Remove the pilot
injector, by slackening the supply pipe nut first, and unscrewing
the pilot injector from the pilot burner
– Remove the contamination from within the pilot burner using
a pipe cleaner, and blow through to remove any further debris.
– Replace the pilot injector, ensuring that the washers are properly
fitted.

WINTERISATION
Winterisation of Holiday Homes That Have a Water Heater
Fresh water freezes at 0°C and expands by 9% with a significant force that will destroy:
•Pipe work
•Water heater components
•Taps, and shower valves
DRAIN DOWN
If you leave fresh water in your caravan system over the winter you will run the risk of damage. This can only be avoided by
removing the fresh water from the system – we call this a “drain down”. You may wish to drain down the fresh water system
yourself using the procedure in the next section but we STRONGLY RECOMMEND that you have this carried out by an
experienced engineer as many caravan systems can only be completely drained by blowing the water out and this requires
specialist equipment. View the £50-£60 charge for a drain down as a mini insurance policy and always ask the engineer if he has
equipment to blow the water out. The two most common parts to be damaged by frost are the shower valve and the water control
assembly in a water heater and the costs to replace these are around £100 each.
Drain Down Procedure – without specialist equipment
•Turn off the fresh water supply stop cock outside the Holiday Home
•Disconnect the fresh water feed outside the home if possible as this protects from flooding due to stop cock failure
•Open all hot and cold taps and shower valves and place the shower head in the tray
•Use the Holiday Home Owner’s Handbook to locate all the fresh water drain cocks under the van – some of these may not be
obvious
•Open these drain cocks
This procedure does not guarantee that all the fresh water will leave the system. Most modern homes have double check valves in
the TMV2 shower mixers and these trap fresh water and stop the flow of water around the system once the drain cocks and taps
are open. It may appear that all the water has left the system, but beware! This pitfall can be avoided by removing the shower
mixer valve/valves from the system after the cold water supply has been switched off and the drain cocks opened. Many
manufacturers provide access panels and these may make the removal of shower mixers easier. Removal of some shower mixers
requires the use of special tools.
In addition, pipe work layouts can cause air locks leaving water inside vulnerable components such as the water heater or shower
mixer.
Re-commissioning the home is a reverse of the above procedure.
This drain down procedure may work but the only way to be sure is to blow the water out using compressed air at 3 bar maximum
pressure.

WARRANTY
The water heater is guaranteed against manufacturing defects for one year from first commissioning date. However the guarantee
is subject to proof of commissioning in accordance with the gas safety (Installation and Use) act of 1998. The guarantee does not
cover defects caused by lack of maintenance.
Morco Products Ltd. warranty will cover parts and labour if the appliance has been fitted as part of the original equipment in a
caravan holiday home or leisure accommodation vehicle.
Appliances distributed as non original equipment either directly from Morco Products Ltd. or other merchants are subject to a return
to base policy for repair and return.
As an alternative to returning the appliance for repair we will supply spare parts and advice for defective appliances on the provision
that we can talk to the competent registered gas safe engineer involved in the fitting or repair of the defective appliance.Under
this approach, no compensation will be offered for labour involved in the removal and refitting of the appliance or for any work /
travelling involved in the fitting of spare parts.
Exclusions from warranty
- Damage caused by frost
- Scaling up of the heat exchanger
- Blocked pilot injectors
- Insect or debris in the burner or heat exchanger
- Blocked gas or water filters
- Incorrect operation caused by damaged mixer taps or shower TMV2
- Incorrect installation of the appliance or flue
- Low water pressure
Please note that proof of commissioning for the purposes of this warranty is a copy of the commissioning certificate
as filled out by the Gas Safe Engineer or other qualified personnel.

Supplied by Innovita Italy
Distributed in U.K. by:
MORCO PRODUCTS LTD
Morco House
Riverview Road
Beverley
East Yorkshire
HU17 0LD
ENGLAND
Telephone Number: 01482 325456
Fax Number: 01482 212869
Web Address: www.morcoproducts.co.uk