ROC COMBI HE 2802 User manual

User’s manual
Condensing Wall Mounted
Gas Fired Combination
Boilers:
ROC COMBI HE 2802
ROC COMBI HE 2810
ROC COMBI HE 4010
G.C.N:47-492-01(28 KW)
G.C.N:47-492-02(40 KW)

3
Dear Customer,
Thank you for choosing a ROC boiler.
This manual provides detailed instructions
and recommendations for the correct use
and maintenance of the ROC 28 and 40KW
boiler.
Remember to keep this manual in a safe
place for future reference.
Your local ROC Servicing Centre is at your
complete disposal for all needs.
Support telephone number: 08452268261
Email: [email protected]
Website: www.rocboilers.co.uk
GUARANTEE
ROC Combi Boilers 2810 and 4010 both
come with a Parts and Labour Warranty
for 10 years from the date of Installation,
ROC Combi boiler 2802 has a 2 Year parts
and Labour Warranty from the date of
installation. For full details and registration
visit www.rocboilers.co.uk.

45
The Installation and the rst ignition of the
boiler must be performed by a qualified
personal in compliance with current
national regulations regarding installation,
and in conformity with any requirements
established by local authorities and public
health organizations.
After the boiler has been installed, the
installer must ensure that the end user
receives the declaration of conformity and
the operating manual, and should provide
all necessary information as to how the
boiler and the safety devices should be
handled.
The appliance is designed to produce hot
water for domestic use.
It should be connected to a heating system
and a distribution network for domestic hot
water, both of which must be compatible
with its performance and power levels.
The use of the appliance for purposes other
than those specied is strictly forbidden. The
manufacturer cannot be held responsible for
any damage caused by improper, incorrect
and unreasonable use of the appliance or by
the failure to comply with the instructions
given in this manual.
Installation, maintenance and all other
interventions must be carried out in
full conformity with the governing legal
regulations and the instructions provided by
the manufacturer. Incorrect installation can
harm persons, animals and possessions; the
manufacturing company shall not he held
responsible for any damage caused as a
result.
The boiler is delivered in a carton. Once
you have removed all packaging, make sure
the appliance is intact and that no parts
are missing. If this is not the case, please
contact your supplier.
Keep all package materials (clips, plastic
bags, polystyrene foam etc.) out of reach of
children as it may present a potential hazard.
In the event of a fault and/or malfunction,
turn the appliance off, turn off the gas and
do not attempt to repair it yourself. Contact
a qualied professional instead.
Before any maintenance or repair work is
performed on the boiler, make sure you have
disconnected it from the electricity supply
by switching the external switch to the “OFF”
position and removing the fuse.
All repairs, which should only be performed
using original spare parts, should be carried
out by a qualified professional. Failure to
comply with the above instructions could
compromise the safety of the appliance
and invalidate all liability on the part of the
manufacturer.
In the event of any maintenance or other
structural work in the immediate vicinity of
the ducts or flue gas exhaust devices and
their accessories, switch the appliance off by
switching the external switch to the “OFF”
position and shutting off the gas control
valve. When the work has been completed,
ask a qualified technician to check the
efciency of the ducting and the devices.
If the boiler should be out of use for a
prolonged period, it is recommended that
the electrical power supply be disconnected
and that the external gas cock be closed. If
low temperatures are expected, the boiler
and system pipe work should be drained in
order to prevent frost damage.
Turn the boiler off and turn the external
switch “OFF” to clean the exterior parts of
the appliance.
Do not allow children and inexperienced
persons to use the appliance without
supervision.
The CE symbol guarantees that the
appliance conforms to the following
directives:
-2009/142/CEE
relating to gas appliances
-2004/108/CEE
relating to electromagnetic compatibility
-92/42/CEE
relating to energy efciency
-2006/95/CEE
relating to electrical safety
Failure to comply with this warning
implies the risk of personal injury, in some
circumstances even fatal.
Failure to comply with this warring
implies the risk of damage, in some
circumstance even serious, to property,
plants or animals.
Do not perform operations which involve
opening the appliance.
Electrocution from live components.
Personal injury caused by burns due to
overheated components, or wounds caused
by sharp edges or protrusions.
Do not perform operations which
involve removing the appliance from its
installation space.
Electrocution from live components.
Flooding caused by water leaking from
disconnected piping.
Explosions, fires or intoxication caused by
gas leaking from disconnected piping.
Do not damage the power supply cable.
Electrocution from live uninsulated wires
Do not leave anything on top of appliance.
Personal injury caused by an object
falling off the appliance as a result of
vibrations
Damage to the appliance or items
underneath it caused by the object falling off
as a result of vibrations.
Do not climb onto the appliance.
Personal injury caused by the appliance
falling.
Damage to the appliance or any objects
underneath it caused by the appliance falling
away from its installation space.
Do not climb onto chairs, stools, ladders or
unstable supports to clean the appliance.
Personal injury caused by falling from
a height or cuts (step ladders shutting
accidentally).
Do not attempt to clean the appliance
without rst switching it off and turning the
external switch to OFF position.
Electrocution from live components.
Do not use insecticides, solvents or
aggressive detergents to clean the
appliance.
Damage to plastic and painted parts.
Do not use the appliance for any use other
than normal domestic use.
Damage to the appliance caused by
operation overload.
Damage caused to objects treated
inappropriately.
Do not allow children or inexperienced
individuals to operate the appliance.
Damage to the appliance caused by
operation overload.
If you detect a smell of burning or smoke
coming from the appliance, disconnect
it from the electricity supply, turn off the
main gas valve, open all windows and call
for assistance.
Personal injury caused by burns, smoke
inhalation, intoxication.
If there is a strong smell of gas, turn off
the main gas valve, open all windows and
call for assistance.
Explosions, res or intoxication.
Safety regulations
Key to symbols:

67
1 2 3 4 5 6
Control panel
Display
1. Flame indication icon (ame
indicates when burning)
2. Error indication icon (indicator
ashes when error occurs)
3. Hot water only icon (indicator
ashes when performing hot water
function)
4. Central heating icon (indicator ashes
when performing heating function)
5. Temperature/Error icon (hot water
and heating temperature indicate, error
code indicator (when error occurs)
1
2
3
4
5
Initial operating procedures
If the boiler is installed inside an apartment,
make sure that all provisions relating to the air
inlet and room ventilation (in compliance with
current legislation) are respected.
Check the water pressure on the display
regularly and make sure that the figure is
between 1 and 1.5 bar when the system
is cold. If the pressure is just under the
minimum valve the display will request a lling
procedure.
Re-establish the correct pressure by using the
lling loop.
If the pressure drops very frequently, there
may be a water leak at some point in the
system. If this is the case a plumber should be
contacted.
ROC Combi HE 28 & HE 40
Attention
When in heating mode, the gas boiler will need
two minutes to reach its nominal capacity after
ignition. Within these two minutes, the gas
volume will be lower than the nominal capacity
gas volume; this setting is for the purpose of
safe ignition.
Adjusting Heating
The display will show when
the power is connected. Press the ON/OFF
button for 5 seconds, the boiler will be turned
on and work under Central heating, at this
time, the display will show .
If you need to turn off the boiler, press ON/OFF
button for 5 seconds.
Setting central heating temperature
Press the heating temperature up /
down button to set the temperature of
the central heating water (press “up” button
to increase the temperature and press “down”
button to decrease the temperature)
Note:
Connections viewed under the boiler.
Note:
The boiler has a built-in an anti-short time
circle energy saving control program. In
heating mode, it will prevent the boiler from
starting frequently within a short period of
time to save energy. So when the boiler has
just stopped, it will not start immediate even if
the heating temperature is adjusted to a higher
level, and it will start working again after a
short time.
4).ON/OFF (Power) button (Central heating/ Hot
Water only mode)
5).Heating temperature up/down button
6).Pressure gauge
1).Timer
2).D.H.W. temperature up/down button
3).Display

89
Use sanitary hot water
At the water usage point (such as hand
washing basin, bath sink, etc), the boiler will
run and supply hot water automatically when
you open the hot water tap regardless to
whether the boiler is in Central heating/ Hot
Water only mode. The boiler will turn off the
hot water function automatically when you
close the hot water tap (or it will continue to
run and supply heating under the condition of
request).
The boiler will transfer to Central heating/
Hot Water only mode when you press the
heating up button and the hot water up button
together for 3 seconds after the boiler turn
on.
Setting the hot water temperature
Press the hot water temperature up /
down button to set the temperature
of hot water (press “up” button to increase
the temperature and press “down” button to
decrease the temperature)
Note:
The above operation is used for adjusting
the temperature of D.H.W. (Domestic Hot
Water) If it still has not reached your request
temperature when pressing the “up” button
to maximum temperature, then it is possible
that the boiler has been in full load state.
Under this condition, you may need to turn
down the hot water tap a little to reach higher
temperatures of hot water.
Warning!
Anti Frost Device
If the system is likely to face freezing
temperatures, the gas and power supply
should be opened and turned on, so the anti-
freezing system can operate. But if the system
is not needed for a long period, please drain
out the water from the appliance, heating and
hot water system, and then stop the gas and
power supply.
1. General layout
The mechanical clock covers a 24 hour period.
Each tappet represents 15 minutes A. An
override switch is located on the clock B.
2. To set the time
To set the time of day, grasp the outer edge
of the dial and turn slowly clockwise until the
correct time is lined up with the arrow C.
3. To set the “On” and “Off” times
The clock uses a 24hours system. e.g.8 = 8
:00 am and 18 = 6:00 pm. “ON” periods are
set by sliding all tappets between the “ON”
time and the “OFF” time to the outer edge of
the dial. The tappets remaining at the centre of
the dial are the “OFF” periods.
Clock instructions
4. For operation
Put the selector switch Bto the symbol
to control the central heating by the clock.
Put the switch Bto “I” to select permanent
operation or to “0” to turn the central heating
off permanently.
Turn off the boiler
Not being used for a short period
If the boiler is not needed for a short period
then, press (Five Seconds) and it will turn
off. When the boiler is under OFF state, please
keep the electrical and gas supply on. The
boiler will run according to a self protection
program.
Not be used for a long period
If the boiler is not needed for a long period,
then pres (Five Seconds) and it will turn
off. Disconnect the electrical supply; turn off
the gas valve and valves for heating/domestic
hot water system. To preventing frost damage,
drain all the water in the boiler (heating and
domestic hot water) and in the heating pipe.
Anti-freeze function
The gas boiler has anti-freeze function.
If the gas and power is on, the boiler will start
to work automatically when the heating water
temperature is below 5°C, and heat the water
in the system to about 30°C .
Note:
If the gas boiler stops running for several
hours in very cold weather, it may lead to the
freeze of the system. If you are not at home
during freezing periods, be sure to keep
the heating function running, and keep the
temperature of every room above the freezing
point.
However, when there is some external failure,
such as gas outage, power off or air exhaust
system are abnormal, the inner inspection
device will turn off the boiler automatically,
so it can’t protect against freezing. To avoid
such situations, if there are no people at home
for a long period, you may ask a plumber to
drain out the water in heating system and gas
boiler.
Note:
When the gas boiler is executing the anti-
freeze function, it may need to conduct
combustion work. So the gas supply must be
smooth and water in the heating system.

10
Operation failure error table
Error code:
Important
If the boiler shuts down frequently contact an authorized service centre for assistance. For safety
reasons, the boiler will allow a maximum of 5 reset operations.
Service Centre Contact Details – once we have this.
Memo
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Code
Er 01 + RESET
Er 02 + RESET
Er 03 + RESET
Er 04 +
Er 05 +
Er 06 +
Er 07 +
Er 08 +
Er 09 +
Er 10 + RESET
Er 11 + RESET
Er 12 +
Er 13 +
Er 14 + RESET
Er 15 +
Er 16 +
Er 17 + RESET
Er 18 + RESET
Description
Flame cannot be detected after ignition (Ignition fault)
Overheat inside
Residual ame fault (Flame signal can be detected after
the gas valve is closed)
Water pressure fault in pipeline
Fan control fault/Air pressure switch
fault/ue system fault
NTC-temperature sensor fault (Heating)
NTC-temperature sensor fault (DHW)
External temperature sensor fault
Flue system temperature sensor fault
Overheat (﹥90°C) of ue exhaust system
Fake ame (ame can be detected before the
boiler is turned on)
Return-back water temperature sensor fault
EEPROM fault
The heating water is overheated (﹥93°C)
Gas valve circuits fault
Continuous ameout fault, continue to ameout
8 times in 5 minutes
Electric supply voltage fault, supply voltage is too low
Power frequency fault, the deviation between power
supply frequency and reference frequency ﹥2Hz

ROC UK
UK HD Ltd
14 Lenton Business Centre
Lenton Boulevard
Nottingham
NG7 2BY
Support Number 08452268261
Email [email protected]