Morco EUP6 Operating instructions

EUP6 - EUP11
Instantaneous gas water heater
User, Installation and Maintenance Manual

2
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-red 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
This appliance is certied to be placed in the following countries
in relation to gas type and pressures:
EUP6
Cat. I3P (G31 - Propane @ 37 mbar): Belgium (BE), Spain
(ES), France (FR), Great Britain (GB), Italy (IT), Holland
(NL), Ireland (IE)
Cat. I3P (G31 Propane @ 50 mbar) Germany (DE), Au-
strian (AT)
Morco Morco EUP11
M
B
62 dB
0 8
kWh/annum GJ/annum
2017 812/2013
PRODUCT DATASHEET
Morco EUP6 EUP11
Declared load prole XS M
Indoor sound power level dB(A) 62 62
Water heating energy efciency class A B
Water heating energy efciency class % 48 58
Annual energy consumption GJ 3 8
Nitrogen oxide emissions G31 mg/kWh 29 -
Nitrogen oxide emissions G30-G31 mg/kWh - 61-20
Morco Morco EUP6
xs
A
62 dB
0 3
kWh/annum GJ/annum
2017 812/2013
EUP11
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), Au-
strian (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 efciency characteristics.
In this way the end consumer can identify and compare similar products and can make informed choices regarding high
efciency appliances.

3
WARNING
This booklet contains information relevant to
the user as well as the installer.
When the product has reached the end of its service-
able life, it shall be disposed of in an environmentally
friendly way and disposed of according to the regu-
lations in force.
Separate collection and recycling of the product avoid
negative impact for environment and health, and al-
lows recovery of materials, in order to obtain energy
and resources saving
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
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 2017 Small Craft LPG Systems
CONTENTS
GENERAL SAFETY WARNINGS page 4
DESCRIPTION OF THE APPLIANCE page 4
1 OPERATION page 5
1. a Function page 5
1. b Usage page 5
1. c Dimensions page 6
1. d Components page 7
2 TECHNICAL CHARACTERISTICS page 8
2. a Technical Data page 8
3 INSTALLATION 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
4 MAINTENANCE 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 nal checks page 12
WINTERISATION page 13
WARRANTY page 14

4
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 lter to insert in the water valve
pipe tting.
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 qualied personnel according to the law in force,
in compliance with the installation regulations including any
revisions.
A Gas Safe Engineer or other qualied personnel must
commission this device.
The device must be used according to the manufacturer
specications. The manufacturer cannot be held con-
tractually or otherwise responsible for damage caused to
persons, animals or objects as a result of incorrect installa-
tion, repair or maintenance or improper usage.
The product’s safety or automatic regulation devices must
not be modied unless performed by the manufacturer.
This device is intended for heating water and therefore
must be connected to a water distribution network whose
ow 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 qualied 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 proper-
ly, deactivate it, do not attempt to perform any repairs and
contact a Gas Safe Engineer or other qualied 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 frien-
dly 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 in-
tended by the manufacturer.
Do not block the intake, ue 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 produ-
ce 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 ammable 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 EUP6 and EUP11 are an open ued 6 and 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 sufcient ventilation. See section 3.c. Room Ventilation.
The appliance is suitable for use in dedicated boiler cupboards in caravan holiday homes.
The appliance relies on a pilot ame to ignite the main burner once a hot tap is opened.
The appliance does not store hot water.
The ow of the water through the appliance can be adjusted from 3 to 6 litres per minute (EUP6 model) and 5.5 to 11
litres per minute (EUP11 model) 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 clockwise to ensure hot water of an acceptable temperature.

5
1. OPERATION
A = Gas economizer on/off
●off position
pilot position
minimum gas level
maximum gas level
B = Water temperature selector
Minimum Temperature
Maximum Temperature
g. 1
6 0
7 5
A
B
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 g 1
- A water temperature control knob – “B” in g 1
The minimum gas level in g. 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 capabili-
ty. In effect the selector reduces the water ow through the heater
to the taps to increase the water temperature and correspondin-
gly increases the water ow 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 sum-
mer 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 re 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 pilot position (), press the knob down all
the way and keep it pressed
- Press the piezo electric button that is located under the water
heater until the spark ignites the pilot ame. The ame can be
seen through the viewing hole on the front of the heater by
looking slightly upwards and to the left. When it ignites, keep
the gas control knob (“A” in g 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 ame ( ), during rotation it is
necessary to keep the knob pressed down lightly until the nal
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 ame remains switched on
for future requirements
- If the main burner or pilot ame is accidentally turned off, the
gas valve automatically blocks the output of gas within 60 se-
conds so to avoid any danger. To return the device to an ope-
rational mode, repeat the steps above
The machine is switched off by rotating knob A to the OFF posi-
tion (●).
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 qualied personnel service the machine
at least once a year.
PRECAUTIONS TO BE TAKEN AGAINST FROST AND FREE-
ZING CONDITIONS
If there is a possibility that the area where the appliance is in-
stalled 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 “troubleshoo-
ting” 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
Min temp Max temp

6
g. 2
AC
G
AF
int. 90
3 5
174
= =
5 6
118
3 4 60.543.5
255
G
AF
AC
4 1
115
146
246
229
8
3 0
8 4
107
550
EUP6
EUP11
244
150
Ø int 110
3 5
9 7 118
29.569.5
592
AC
AF
G
101
8 4
4 1
115
146
229
246
3 0
8
AC
G
AF
314
1.c Dimensions

7
g. 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 test point
8b Burner pressure test point
9 Gas inlet
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
EUP11
1
2
3
4
5
6
7
8b
8a
9
10
11
13
15
12
14
EUP6
1.d Components
1
2
3
4
5
6
7
8b8a
9
10
11
12
13
14
15

8
2. TECHNICAL CHARACTERISTICS
2.a Technical Data
EUP6 EUP11
kW - kcal/h kW - kcal/h
Nominal power usage (Pn) 13,2 - 11.350 19,4 - 16.665
Nominal Thermal range (Qn) 11,6 - 9.980 21,7 - 18.662
Minimal power usage (Pm) 6,6 - 5.680 9,6 – 8.260
Minimal Thermal range (Qm) 5,8 - 4.960 10,8 – 9.288
GAS TYPE PROPANE BUTANE PROPANE
G31 G30 G31
P.C.I. (15° C 1013 mbar) MJ/m388 116,09 88
WI (15° C 1013 mbar) MJ/m370,69 80,58 70,69
Consumption kg/h 1,03 1,71 1,69
Burner Pressure mbar 32,0 26,60 35,80
Nr/Ø main burner injector Nr/mm 14 x 0,5 18x0,48+6x0,50
Ø pilot ame injector mm 0,23 0,23
Ø gas connection inch 1/2” 1/2”
Flue gas load (max-min) g/s 12,48-10,29 11,80-9,75 12,48-10,29
Flue gas temperature (max-min) °C 181-115 157-110 173-118
WATER EUP6 EUP11
Input range l/min Maximum 6 l/min Minimum 5 l/min Maximum 10.8 l/min
Water temperature lift °C approx. 25 approx. 50 approx. 25
Minimum pressure bar 0,2 0,2
Nominal pressure bar 2 2
Maximum pressure bar 10 10
Ø Water connections inch 1/2” 1/2”
Ø ue spigot diameter mm 90 110
DIMENSIONS AND WEIGHTS DEVICE PACKAGE DEVICE PACKAGE
Height mm 550 632 592 675
Length mm 255 303 314 361
Depth mm 246 283 245 280
Weight Kg 9,00 10,30 11,80 13,10
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 liqueed petroleum gas (L.P.G.) must comply with
all the manufacturer’s requirements and those of the regulations
in force.
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 tting of a vertical exhaust gas ue
- It is vital to leave the minimal distances around the device as
shown in g 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 un-
less specically 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 xed to a load bearing wall in a vertical
plane.
g. 4
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 ue pipe of Ø90 (for EUP6) and Ø110mm
(for EUP11) must be used and when it passes through combu-
stible materials, a metal sleeve of Ø170mm must be used to
allow an air gap of 25 mm. Part codes FTFCT (for EUP6) and
FTFCTRIMG101 (for EUP11).
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 ueing requirements are given in BS EN
1949.
The overall length of the ue 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 tted.
• AIR SUPPLY FOR COMBUSTION
Air requirements: Reference is made to 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 specied in BS EN
1949, i.e. 10 cm² per kilowatt input rating divided between high
and low.
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
t- 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 specication 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 uid 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 rea-
ches the pressure indicate in the technical data.
50 50
200

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 lter into the water valve input tting.
Remove the plastic cap from the water outputs tting before connecting it to the water supply.
g. 5
1 Flue diverter hood
2 Flue gas safety device
3 Hot water limit thermostat
4 Heat exchanger
5 Burner
6 Ignition electrode
7 Thermocouple
8 Pilot burner
9 Main 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 lter
17 Diaphragm
18 Cold water input
19 Gas adjustment knob
20 Gas valve
1 Cappa scarico
2 Dispositivo di controllo fumi
3 Termostato limite acqua
4 Scambiatore di calore
5 Bruciatore
6
7
Bruciatore pilota8
Elettrodo di accensione
9 Iniettore
10 Uscita acqua calda
11 Presa di pressione
12 Selettore di temperatura
13 Venturi
14 Valvola idraulica
16 Filtro dell’acqua
17 Membrana
18 Entrata acqua fredda
19
20 Valvola gas
Magnete
Comando gas
Termocoppia
19
20
21
6
7
8
15
15
1
2
3
4
5
9
10
11 12
13 14
16
17 18
3.f Flue Gas
For output of ue gases refer to the regulations in force including
any updates. See page 3.
The water heater must be connected to a suitable ue terminal.
The following must be observed:
- The ue must be installed vertically – through the roof of the
holiday home
- The diameter of the ue terminal must match that of the water
heater (90 mm for EUP6 and 110mm for EUP11)
- The overall ue length from the top of the water heater to the
top of the external ue must be at least 600mm. The distance
from the external roof surface to the top of the external ue
must be at least at least 250mm.
Flue gas safety device
This product is equipped with a ue gas safety device. The devi-
ce ensures the ue gases leave the water heater safely via the
ue. The ue safety device marked as 2 in Fig.6 is a ue gas
safety device that will interrupt the ow of gas to the water heater
burner and pilot light in the event that there is a total or partial
blockage in the ue that does not allow the ue gases to leave
safely. The device will also operate if the design or length of the
ue 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 ue 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.
SCHEMATIC DIAGRAM

11
4. MAINTENANCE
To maintain the machine at maximum efciency, have a Gas Safe
Engineer or other qualied personnel perform a maintenance
check at least once a year.
Before cleaning or performing maintenance, opening or disas-
sembling the panels, switch off the device and turn off the gas
supply. Check the main burner and the pilot ame, the ignition
electrode, the safety valve and that there is no gas or water lea-
kage. Check that there is nothing obstructing the passages within
the heat exchanger or ue.
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 ammable 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)
- Pull the bottom of the casing forwards until clear of the gas/
water spindles
- 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.
g. 6
PROBLEM CAUSE SOLUTIONS
There is no spark - appliance spark wire is disconnected
- piezoelectric mechanism broken
- the electrode is damaged
- reconnect
- test, replace
- replace
The pilot does not switch on when there
is a spark
- pilot injector blocked
- electrode activation position needs
changing
- no gas supply
- air in the gas tubes
- clean by immersing in solvent or replace
- adjust
- open the appliance gas isolation valve
- purge air by turning on all gas rings on
hob for 30 seconds
The pilot does not stay on - thermocouple faulty
- broken magnetic valve
- ue sensor faulty or activated
- replace
- replace
- check ueing/ventilation
- replace
Pilot on but the main burner does not
ignite
- insufcient water pressure
- the diaphragm is broken
- Increase the external water supply
pressure
- rotate the knob B counter clockwise
- replace
The burner does not switch off when the
water turns off
- contamination on the gas valve seat
- gas valve push rod is locked in the open
position
- check the gas pressure
- test, clean
- Check the correct operation of the cold
water push rod , dis-assemble, clean or
replace
- if the inlet gas pressure exceeds the
specication replace the pressure
regulator on the external bottle or tank
Delayed burner activation - pilot burner ame is too far from main
burner ame or it is too short
- check inlet gas pressure, clean injector
and pilot burner
The heat exchanger ns becomes sooty
in a small amount of time
- poor draught, adverse weather condi-
tions or dusty surroundings
- yellow ame
- excess gas consumption
- check the ue installation
- check the gas type and clean the burner
- check gas pressure and adjust
4.b Troubleshooting: problems and solu-
tions
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 perfor-
med by Gas Safe Engineers or other qualied personnel.

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 ames ensuring there is no
yellow- ness which would indicate burner venturis blocked by in-
sect 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.
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 specied in this manual in order to achieve the desired
performance specied 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 ue for spillage: close all the doors and windows in the
room containing the water heater. If there are any fans or extrac-
tors in the room then these must be turned on full. Light any other
open ued appliances such as res of gas hobs. Turn the water
heater on by opening a hot tap on full burn and run for 5 minutes
to allow the ue 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 ue 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 ue for blockages, check that the correct ue terminal
is tted and that the correct ventilation is tted 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 ow.
This means that the heat exchanger may be furred up, creating
the above situations
Note: De-furring/descaling should be carried out using proprie-
tary agent or dilute hydrochloric acid. It is recommended to cir-
culate the descaling uid around the heat exchanger in order to
speed up the process.
• MINIMUM ANNUAL MAINTENANCE
Gas water heaters are rugged pieces of equipment which are de-
signed to work for a long time with minimum maintenance requi-
rements. 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 begin-
ning of each season.
• CLEANING THE MAIN BURNER
To carry out the annual cleaning of the burner, proceed as fol-
lows:
– 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 par-
ticles 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
ns. Soot, if found, should be removed by washing, and the
cause of the sooting investigated.
• CLEANING THE PILOT
If the pilot light ame is yellow and the safety valve takes a long
time to open, this means that either the pilot injector or pilot bur-
ner is partially blocked.
The pilot injector may be blocked with contaminants carried wi-
thin the gas, whilst the pilot burner is more likely to be contami-
nated 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 injec-
tor or immersing in solvent fails to clear the restriction, then a new
injector should be tted.
When the pilot is working normally the ame 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 rst, and un-
screwing 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 pro-
perly tted.

13
WINTERISATION
Winterisation of Holiday Homes That Have a Water Heater
Fresh water freezes at 0°C and expands by 9% with a signicant 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 charge
for a drain down as a mini insurance policy and always ask the engineer if he has the equipment to blow the water out. The two most
common parts to be damaged by frost on a water heater are the water control assembly and heat exchanger and the shower valve
can also be damaged by frost and the costs to replace these can be expensive, see our website for water heater spare prices.
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 ooding 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 ob-
vious
• 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 ow 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.

14
WARRANTY
The water heater is guaranteed against manufacturing defects for one year from rst commissioning date. However the gua-
rantee 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 tted 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 tting or repair of the defective appliance. Under
this approach, no compensation will be offered for labour involved in the removal and retting of the appliance or for any work /
travelling involved in the tting 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 lters
- Incorrect operation caused by damaged mixer taps or shower TMV2
- Incorrect installation of the appliance or ue
- Low water pressure
Please note that proof of commissioning for the purposes of this warranty is a copy of the commissioning certicate
as lled out by the Gas Safe Engineer or other qualied 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