Morco FEB24ED3* User manual

FEB-24ED 3!USER INSTRUCTIONS AND
TECHNICAL INSTRUCTIONS
T
To Domestic Hot W o Domestic Hot Water: ater:
Minimum 7.7 kW (26,291.07 Btu/h)
Maximum 24.5 kW (83,653.411 Btu/h)
T
To Central Heating: o Central Heating:
Minimum 7.7 kW (26,291.07 Btu/h)
Maximum 24.5 kW (83,653.411 Btu/h)
BOILER OUTPUT
BOILER OUTPUT
EC-TYPE EXAMINATION CERTIFICATE
0099BU901
Morco House, Riverview Road, Beverley, East Yorkshire, HU17 0LD
Morco Products Ltd
Tel: [phone] Fax: [phone]
Website: www.morcoproducts.co.uk

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CONTENTS
Section Page
1 USERS INSTRUCTIONS 4
2 GENERAL SPECIFICATIONS 8
3 TECHNICAL DATA 10
4 GENERAL INSTALLATION REQUIREMENTS 12
5 INSTALLATION INSTRUCTIONS 15
6 COMMISSIONING INSTRUCTIONS 17
7 ROUTINE SERVING INSTRUCTIONS 18
8 TROUBLESHOOTING 19
9 FAULT CODE TABLE 20
10 WARRANTY CONDITIONS 20

4
GAS SAFETY (INSTALLATION AND USE) REGULATIONS 1998 (AS AMENDED)
It is the law that all gas appliances are installed by a registered person, in accordance with the above regu-
lations. Failure to install appliances correctly could lead to prosecution. It is in your own interest, and that of
safety, to ensure that the law is complied with.
Read these instructions carefully before attempting to operate the appliance. Comply with all applicable warn-
ings. Do not interfere with any sealed components, and use the appliance only in accordance with these
instructions.
INTRODUCTION
The MORCO FEB-24ED 3 is wall hung, room sealed, fan assisted, microprocessor controlled, fully modu-
lating gas combination boiler for providing both central heating and domestic hot water.
DOMESTIC HOT WATER SERVICE
Turn the right knob (DHW) in order to turn the boiler on. The display will show "On" indicating that the boiler
is ready to supply Domestic Hot Water (DHW) whenever there is demand for it. When a hot tap is opened the
boiler automatically to deliver hot water and the orange light will come on indicating the burner is on. A
water temperature of between 35° and 60° C can be selected by turning the domestic hot water temperature
regulating knob. The value selected will be shown in the display when it is changed with the knob.
HOT WATER AND CENTRAL HEATING SERVICE
With the main control switch on and the display showing “On”,
turn the heating selector knob clockwise from the summer set-
ting.. The boiler will up automatically when either the time
clock/room stat or boiler stat calls for central heating, or a hot tap
is opened for hot water. If a hot tap is opened the boiler gives pri-
ority to hot water delivery with the central heating on standby
until the tap is closed.
The temperature of the radiators can be selected between 60ºC
and 85ºC by turning the knob. the value will be shown on the dis-
play.
Note: If the boiler has been for under heating the temperature cannot be altered by the user
operating the control knob. Only the pre-set value set up by the installer will be available
1.- USERS INSTRUCTIONS
56
1
4
1.-Pressure gauge
2.-Heating service and heating temperature selector
3.-Main control, reset and D.H.W temperature selector
4.-Clock
5.-Orange light. Burner on
6.-Red light lock out
7.- Display (between both knobs)
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5
USING THE PROGRAMMABLE CLOCK
1. Set the correct time by rotating the minute hand until the arrowhead
points at the correct time on the 24 hour dial.
2. Check the position of the manual override switch (just to the bottom of
the clock face). This has three positions:
-Left: is ON overriding the timer mode
-Middle is timer mode, with ON, OFF, times governed by the time clock.
-Right position is OFF. The heating will not work at all regardless of the
main boiler control switch except if triggered by the built in frost protec-
tion thermostat.
3. To set on/off times, move all the white tappets , in the outer ring,
between the required 'on' and 'off' times.to the outer position. For exam-
ple, if you want the heating to come on at 6am and switch off at 10am,
move all the tappets outwards between these two times. Each tappet
represents a quarter of an hour. Set as many on/off times as required
within a 24 hour period
N.B. THE TIME CLOCK MUST BE RESET TO THE CORRECT TIME IF
THE POWER SUPPLY TO THE BOILER HAS BEEN INTERRUPTED
(POWERCUTS/SEASONAL TIME ADJUSTMENT)
RED LIGHT-LOCK OUT
Should the boiler fail to ignite due to lack of gas, or poor weather conditions etc. It will “lockout” and the red
light will be displayed and the fault code will be shown in the display..
Note: To reset, turn the main control switch to off then turn on again. If the boiler constantly locks out, call your
service engineer.
TURNING THE BOILER OFF
Turn the main control switch to the position.
NOTE: In this position the automatic safety devices such as frost protection and anti pump seizure are still
operative. To shut down completely and isolate the mains supply the plug must be removed from the wall.
GENERAL GUIDANCE NOTES ON HOT WATER DELIVERY
The temperature of the hot water is governed by both the ambient temperature of the cold water supply and
its flow rate through the boiler. I.E. at a flow rate of 10L/min there will be a maximum rise of 35ºC above ambi-
ent. At a flow rate of 6.8L/min there will be a rise of 50ºC above ambient, (the slower the flow rate, the greater
the temperature rise).
The flow rate of the hot water is controlled by the hot outlet tap.
The temperature selector on the boiler is effective only when there is either a low water flow rate or a high
ambient water temperature.
- The boiler can theoretically supply more than one outlet simultaneously However in practice the tap which
is nearest will receive the most hot water. If the shower is in use and a kitchen tap is opened virtually all the
hot water will be diverted to the kitchen as it offers the least resistance.
- If an outlet is too restrictive it will slow down the flow rate and increase the temperature. For example the
shower - ensure the head is free from blockages caused by scale.
- Due to the restrictive nature of simple mixer showers it is wise to turn the temperature selector down on
the boiler before using the shower.
- If a tap or shower head is too restrictive due to a fault or blockage, the flow rate will be reduced to below
the rate at which the boiler is able to modulate resulting in a wide swing in temperatures. Either fix the restric-
tion or turn the temperature selector on the boiler down.
ON OFF
ON OFF
TIMER

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- Caution: The boiler can produce water at over 70°C when in central heating mode. If you run a hot
tap when the boiler has been heating the radiators, the initial through the hot tap could be very
hot. DO NOT PLACE YOUR HANDS under the tap or use the shower until this initial has passed.
- Allow time (30 seconds) for the temperature to stabilise after making an adjustment at the tap
before making further adjustments.
APPLIANCE SAFETY LOCK-OUT
This boiler has a cut-out indicator built in to it. Whenever a malfunction is detected
in the boiler, the boiler switches o automatically and the cut-out indicator lights up
(red indicator light) To reset the boiler rotate the main control knob to the position
and go back to the chosen position. Some lockout sequences require the thermistors
to cool to within normal operating temperatures before the boiler will reset. The red
indicator light should go out. IMPORTANT: Whenever the boiler has been left idle for
any length of time, or when a new gas bottle is installed (propane models), the appli-
ance may switch o due to the presence of air in the pipes. In cases such as these, repeat the ignition oper-
ation until all of the air has been purged from the system.
FROST PROTECTION
Providing the boiler power supply and gas supply is connected the boiler will automatically on minimum
when near freezing conditions are detected. When the temperature in the system reaches 20°C it will
switch o . For winter storage see notes at the end of this section.
NOTE:It is still necessary to drain the domestic hot and cold water system.
ANTI PUMP SEIZURE DEVICE
When central heating is not being used, but the boiler is in the summer setting (for domestic hot water only)
the pump will automatically run for 30 seconds every 23 hours to prevent it seizing. If the appliance has been
shut down with the electrical supply switched o for a period, this device will not work. The pump may be
found to have jammed when the appliance is switched back on. If so, consult your installer or service engi-
neer.
NOTE: Seized pumps are not covered under warranty.
PRESSURE GAUGE
The pressure gauge should indicate approximately between 0,8 and 1,6 bar. If the pressure is seen to
decrease over a period of time there is a water leak. The boiler is with a safety device to prevent it work-
ing below a pressure of 0.8 bar.
ROUTINE SERVICING
To ensure continued safe and e cient operation of the appliance it is recommended that it is checked and
serviced as necessary at regular intervals. The frequency of servicing will depend upon the particular instal-
lation conditions and usage but in general once a year should be regarded as a minimum even if only occa-
sional usage has occurred. It is the law that any service work MUST be carried out by a competent gas
registered engineer.
SAFETY
It is essential that these instructions are strictly followed for the safe and economical operation of this appli-
ance. The appliance is a fan-assisted room sealed gas boiler and therefore the terminal MUST NOT BE
OBSTRUCTED under any circumstances. If it is damaged, turn o the appliance and consult your installer,
or service engineer. If it is known or suspected that a fault exists on the appliance it MUST NOT be used until
the fault has been by a competent gas registered engineer.

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PRECAUTIONS AGAINST FREEZING DURING WINTER STORAGE
If the holiday home is to be un-occupied during cold periods, and whenever there is a threat of freezing, the
domestic hot and cold water circuit must be drained as follows:
-Turn off the cold water supply.
-Open all hot and cold taps.
-Open all drain plugs in the hot and cold water system (Do not drain the central heating circuit which should
have been filled with antifreeze) If the boiler is installed in a Caravan Holiday Home, refer to the user
manual for the home, for the positions of all drain plugs.
Note: There are no drain plugs fitted to the actual boiler.
-Leave all taps and plugs open until the boiler is next needed for service. This will allow any residual water to
continue to drain.
NOTES ON FROST PROTECTION
The boiler inbuilt frost protection feature is designed primarily to prevent damage to the heating cir-
cuit and radiators. It will not protect the hot and cold water pipes from freezing under the holiday
home and will provide only a limited protection to the boiler pipework and hot and cold pipework
inside the holiday home.
The heating circuit and radiators should contain the correct level of antifreeze to prevent damage
during freezing conditions and should not be drained down.
For the frost feature to work, the gas supply must be left on and the electrical power supply (wall
socket), must be connected and switched on, the central heating control knob on the boiler must be
in the off position.
Do not rely on the boiler frost protection to prevent freezing of the hot and cold water pipes,
including those inside the boiler during severe frost conditions, it will not.
ALL FROST DAMAGE IS OUTSIDE OF THE WARRANTY

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The Fagor MORCO FEB-24ED 3 is a wall hung,
room sealed, fan assisted, microprocessor con-
trolled fully modulating gas combination boiler for
providing both central heating and domestic hot
water. It is particularly suitable for Caravan Holiday
Home and Park Home use. Maximum heat output in
either heating or hot water mode is 23.7.kW (80.840
Btu/h), and priority is always given to the supply of
hot water.
NOTE: The central Heating power is factory set at
70% of its maximum.
The appliance is supplied with a standard concentric
duct and wall terminal, however additional
extension kits, vertical kit are available as
optional extras.
The appliance is intended for use with sealed central
heating systems and is supplied for use with
propane gas.
The appliance includes the following components:
Induced draught fan for the extraction of combus-
tion products and induction of combustion air.
Modulating gas valve with double safety valves
Circulation pump with manual anti-seizure device
Central heating expansion vessel.
air pressure switch . Prevents the boil-
er if there is insu cient air supply due to a fault
or blockage.
Water pressure switch. Prevents the boiler ring if
there is less than 0.5 bar in the system.
Thermistors (NTC) There are two thermistors
for automatic control of the domestic hot water and
the central heating temperature.
Safety thermostat Shuts down the boiler in the
event of overheating. Resets after a few minutes
cooling
Electronic controls, incorporating the following fea-
tures:
- Temperature selection for central heating from
between 60 to 85°C (Pre-set between 40º to 60ºC for
under heating).
- Temperature selection for domestic hot water from
between 35 to 60°C.
- Continuous modulation of the gas valve.
- Flame control by ionisation
- Ignition control
- Anti-frost control in the central heating circuit.
- Anti - seizure of the pump.
2.- GENERAL SPECIFICATIONS
Schematic diagram- Hydraulic circuit
1.- Expansion vessel
2.- Pump with Automatic air bleed
3.- Water pressure switch
4.- Central heating thermistor return
5.- Central heating thermistor
6.- Three way valve
7.- Overheat thermostat
8.- Air pressure switch
9.- Venturi
10.- Fan
11.- Sealed air box
12.- Copper heat exchanger
13.- Combustion chamber
14.- Ignition electrode
15.- Burner
16.- Flame sensing electrode
17.- Modulating gas valve
18.- Gas inlet
19.- Hot Water outlet
20.- Plate heat exchanger
21.- C.H
22.- Cold water inlet
23.- C.H return
24.- Pressure relief valve
25.- Automatic By-pass
26.- Expansion vessel valve
27.- Draining valve

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1.- Mains connection
2.- Earth
3.- Fan
4.- Pump
5.- Ignition
6.- Burner Solenoid valve 1
7.- Burner solenoid valve 2
8.- Front panel control
9.- 3 way valve
10.- Air pressure switch
11.- Room Stat (optional)
12.- Clock Connection
13.- Modulating Solenoid Valve
14.- Flame Sensor
15.- High limit stat
17.- Central Heating return thermisthor
18.- Pressure Switch
19.- External Probe
20.- Clock
FEB-24ED 3 ELECTRICAL CIRCUIT DIAGRAM

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Model
FEB-24ED 3
!
Category
II2H3P
Type
C12,C32,C42,C52,C82,B22
kW
24.5
Maximum output
Btu/h
83,653.41
kW
7.7
Central heating and domestic
hot water performances.
Minimum output
Btu/h
26,291.07
Maximum
kW
28.9
Nominal central heating and
domestic hot input (Gr
oss)
Minimum
kW
9.2
Maximum
kW
25.5
Nominal central heating and
domestic hot water input (Nett)
Minimum
kW
8.2
Domestic hot water flow rate at 25ºC (l/min)
14.04
Domestic hot water flow rate at 35ºC (l/min)
10.04
Nominal D.H.W. flow
rate at 34ºC (l/min) 10
Minimum flow rate for activating D.H.W. (l/min)
2
Maximum
Central heating
2.5
Maximum
D.H.W
10
Operating pressure (bar)
Minimum D.H.W. activation
0.3
Expansion vessel capacity (1)
7
Radiators
60-85
Central
heating circuit
Floor heating
40-60
Temperature selection range
(ºC)
D.H.W.circuit
35
-
60
Natural G
-20 20
Gas inlet pressure (mbar)
Propane G
-31 37
Natural G
-20 (m3/h) 2.69
Gas consumption (Hi)
Propane G
-
31 (kg/h)
2.03
Electrical supply (V/Hz)
230V~50Hz
Maximu
m Power Consumption (W) 120
Combustion product’s Temperature (º C)
100
Combustion product’s Mass Flow (g/sec.)
11,858
Height
680
Width
390
Dimensions (mm)
Depth
254
Top
200
Bottom
150
Sides
5
Minimum clearance (mm)
Front
5
Gas inlet
¾ BSP
Domestic cold water inlet
½ BSP
D.H.W.outlet
½ BSP
Central heating flow
¾ BSP
Central heating return
¾ BSP
Net weight (kg)
30
Type of gas
Propane G
-
31
X
3.- TECHNICAL DATA