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4.10
Control box (RMG88.62C2)
Warnings
To avoid accidents, material or environmental
damage, observe the following instructions!
The control box is a safety device! Avoid opening
WARNING
or modifying it, or forcing its operation. Riello
S.p.A. cannot assume any responsibility for dam-
age resulting from unauthorised interventions!
All interventions (assembly and installation operations,
assistance, etc.) must be carried out by qualified personnel.
Before modifying the wiring in the control box connection
area, fully disconnect the system from the power supply
(omnipolar separation).
Protection against electrocution from the control box and all
connected electric components is obtained with the correct
assembly.
Before any intervention (assembly and installation opera-
tions, assistance, etc.), ensure the wiring is in order and that
the parameters are correctly set, then make the safety
checks.
Falls and collisions can negatively affect the safety func-
tions. In this case, the control box must not be operated,
even if it displays no evident damage.
For safety and reliability, comply with the following instruc-
tions:
–
avoid conditions that can favour the development of conden-
sate and humidity. Otherwise, before switching on again,
make sure the control box is perfectly dry.
–
Static charges must be avoided since they can damage the
control box's electronic components when touched.
Use
The control box is a control and supervision system of medium
and large capacity forced draught burners, for intermittent opera-
tion (at least one controlled shutdown every 24 hours).
Installation notes
•
Check the electric wiring inside the boiler complies with the
national and local safety regulations.
•
Install switches, fuses, earth connection etc. in compliance
with local regulations.
•
Do not confuse the powered conductors with the neutral
ones.
•
Ensure that spliced wires cannot get into contact with neigh-
bouring terminals. Use adequate ferrules.
•
Arrange the H.V. ignition cables separately, as far as possi-
ble from the control box and the other cables.
•
When wiring the unit, make sure the 230V AC mains voltage
cables are run strictly separate from extra low-voltage cables,
to avoid the risk of electrocution.
Technical description of the burner
11
GB
S8521
Electrical wiring of the flame detector
It is important for signal transmission to be almost totally free
of any disturbances or loss:
•
Always separate the detector cables from the other cables:
– the line capacity reduces the magnitude of the flame sig-
nal;
– use a separate cable.
•
The cable length must not exceed 1m.
•
Respect the polarity
•
Insulation resistance:
– must be at least 50M between the ionisation probe and
the earth;
– a dirty detector reduces the insulation resistance, fostering
leakage currents.
•
The ionisation probe is not protected against the risk of elec-
trocution. When connected to the electricity supply, the ioni-
sation probe must be protected against any accidental
contact.
•
Position the ionisation probe so that the ignition spark cannot
form an arc on the probe (risk of electric overcharge).
Technical data
Mains voltage
Mains frequency
Built-in fuse
Energy consumption
Weight
Protection level
Safety class
Tightening torque of M4 screw Max. 0,8 Nm
Allowed cable length
Thermostat
Air pressure switch
CPI
Gas pressure switch
Flame detector
Remote reset
Environmental conditions
Storage
Climatic conditions
Mechanical conditions
Temperature range
Humidity
Fig. 5
AC 230V -15% / +10%
50/60 Hz ±6%
T6.3H 250V
20 VA
approx. 260g
IP20
I
max. 20 m at 100 pF/m
max. 1 m at 100 pF/m
max. 1 m at 100 pF/m
max. 20 m at 100 pF/m
max. 1 m
max. 20 m at 100 pF/m
DIN EN 60721-3-1
Class 1K3
Class 1M2
-20...+60°C
< 95% RH
Tab. D
20063701
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