Roca NR-15/20 Installations-, Montage- Und Betriebsanleitung Seite 9

It is important that a good flue duct be
installed in order to avoid backflow or
irregular outlet of the gases.
The necessary precautions should also be
taken to ensure that no condensation
produced in the flue duct enters the boiler.
B11BS-type boilers: They are equipped with
an evacuation control device for the products of
combustion, which should never be unplugged.
If the boiler detects an inadequate evacuation of
flue gases, the gas supply will be shut off and
the corresponding fault code will be displayed.
See section under "Fault Codes" in the user's
manual.
B11-type boilers: These are not equipped with
the above control device. This type of boiler may
only be installed in a room separate from
residential premises and with suitable ventilation
direct to the outside.
R-20/20FF and R-20/20FP: Set up the various
components supplied as shown in
Connect the elbow to the boiler flue socket in the
desired configuration. If it does not coincide with
the fixing holes, it is best to drill the elbow plate.
If the outer duct has been shortened, the inner
duct must also be cut to the same length.
Make a ∅110 mm opening in the outside wall
and allow the straight run of pipe to slightly slope
outwards.
Important: R-20/20FF and R-20/20FP boilers
are CE-certified for use with the following types
of flue ducts. See Fig. 4 and 5:
C12:Horizontal flue duct with discharge to the
outside air. Maximum length in a straigth
line: 3 metres.
C32:Vertical flue duct with discharge above the
roof. Flue terminals of larger diameter
available on the market can be used. In
this case, the maximum length allowed in
a straight line is 8 metres.
C42:Horizontal flue duct connected to a
common stack type 3 CE (common stack
for room-sealed boilers).
C82:Double horizontal conduit. Air inlet from
outside and gas outlet to a single common
conduit. Maximum length from the end of
the air inlet to the gas outlet: 10 metres.
In all these cases, for each 90° elbow that is
fitted, the maximum length will be reduced by
0.7 metres.
R-20/20T Carry out assembly of the kit provided.
See Fig. 5. If it is connected to a flue duct, please
note that it must be designed taking into account
that the maximum rate of flow of the products of
combustion is 17.8 gr/sec and that their mean
temperature is 107°C. It is important that a good
flue duct be installed in order to avoid backflow
or irregular outlet of the gases. The necessary
precautions should also be taken to ensure that
no condensation produced in the flue duct enters
the boiler.
Note: The maximum length allowed in a straight
line is 8 metres. For each 90° elbow that is fitted,
the above dimension will be reduced by 0.5 m.
Electrical connections
The female connector is plugged into the boiler,
as shown in figure 6. To connect it, proceed as
follows:
– Remove it from the boiler.
– Remove the protective cover of the terminal
strip.
– Connect the Live lead to terminal 'L1'.
– Connect the Earth lead to the terminal marked
– Connect the Neutral lead to terminal 'N'.
If the installation has an ambient thermostat,
remove the jumper across terminals T1 and S3
and connect the thermostat wires to them
(minimum cross-section 1 mm
If the thermostat features an anticipatory resistor,
connect it to terminal 'T2', as shown in
The male connector (plug) is located at the
bottom left side of the boiler. See
Ensure that the multiple connector is properly
positioned. It must be pushed fully home.
Remember that if the power supply to the boiler
is to be isolated, this connector must be
unplugged.
Note:
The Earth connection is obligatory.
Start-up
Control Panel
See Fig. 8
Buttons
Wait / Stop
HWS Temperature selector.
Fig. 3.
Heating circuit temperature selector.
Reset after blockage.
Summer (HWS selection).
Winter (Heating and DHW selection).
To increase the temperature
To reduce the temperature
Screen symbols
Programming mode: HWS.
Programming mode: Heating and HWS.
Stoppage, anti-freeze protection.
HWS operating.
Heating operating.
Pressure in Heating circuit.
Temperature of Heating or HWS.
Error codes.
Burners operating. Maximum output.
Burners operating. Medium output.
Burners operating. Minimum output.
Pilot lights
Green. Supply voltage.
Orange. Burners operating.
Red. Blockage.
Filling
Check the position of the CH flow and return
valves (Fig.
To open them, turn anti-clockwise. Increase the
circuit pressure up to 1.5 bar. See
Ensure that the air valve is open. See
Ensure that the pump is running, otherwise press
a screwdriver against the slot on the shaft- end
and turn it. See
Gas
Ensure that the gas inlet cock to the boiler is
open (18). See
clockwise.
Programming and operation
The green lamp indicates that the electrical
supply is reaching the boiler. See
The water pressure should be 1.5 bar. If it is
under 1 bar, the red indicator lamp will light up,
the fault code 03 will be displayed on the screen
and the burners will not ignite. See
2
)
Fig. 6.
Fig. 7.
9). Both valves must be fully open.
Fig. 10.
Fig.
Fig. 13.
Fig. 2. To open it, turn anti-
Fig. 14.
Fig. 15.
Central Heating Mode
Press for a moment to programme the boiler
for Heating and DHW. Domestic Hot Water has
priority over Central Heating.
If there is demand for Heating, the boiler will start
up. The temperature will increase until the
maximum value selected is reached (80°C). The
data shown in Fig. 16
Domestic Hot Water Mode
Press for a moment to programme the boiler
for Domestic Hot Water. If a hot water tap is
opened, the boiler will start up. The temperature
will rise until reaching the maximum value
selected (55°C). The data shown in Fig. 17 will
be displayed.
Stop
Press for a moment to cancel the service
programmed (Fig.
permanent antifreeze protection and pump 'lock-
out' system is activated (see section under
"Permanent Monitoring System").
If for any reason the boiler goes into 'lock-out',
the red indicator lamp will light up. See
Press for 3 to 5 seconds and the boiler will
attempt a new ignition cycle.
Please refer to the "Fault Codes" section in the
user's manual.
Programming Options
The temperatures programmed are: 80°C for
Central Heating and 55°C for Domestic Hot Water.
However, the factory-set temperature may be
altered as follows:
Central Heating Mode
Press for a moment. See
The temperature digits will immediately flash for
10 seconds.
While the digits are flashing, press
wish to increase the temperature, or
wish to decrease it.
Once the new temperature has been set, it will
be automatically stored. The temperature range
goes from 30°C to 90°C.
Domestic Hot Water Mode
Press for a moment. See
The temperature digits will immediately flash for
10 seconds.
While the digits are flashing, press
wish to increase the temperature, or
wish to decrease it.
Once the new temperature has been set, it will
be automatically stored. The temperature range
goes from 40°C to 60°C.
Standard Programme
Press for 10 seconds to re-establish the
factory-set programme. See
Output
The boiler is delivered pre-set to provide 17,500
kcal/h in the Central Heating Mode (15,000 kcal/
h in model NR-15/20). This output may be
12.
regulated from 6,000 to 20,000 kcal/h (up to
15,000 kcal/h in model NR-15/20). If you wish to
adapt the output to the needs of the installation,
proceed as follows:
Keep the three buttons
simultaneously for a moment. The symbols
shown in Fig. 22 will be displayed for 30 seconds.
Press and select the required output. Each
output level which appears on the screen
corresponds to 6, 8, 10, 12, 15, 17.5 and 20 (x
10 3 kcal/h) in models R-20/20, R-20/20FF and
R-20/20T. In model NR-15/20 the corresponding
output level is 6 and 15 (x 10
The new output selected will be stored in memory
by pressing again
will be displayed.
18). In this position, a
Fig. 19.
Fig. 20.
if you
if you
Fig. 21.
if you
if you
Fig. 18.
pressed
3
kcal/h).
simultaneously.
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