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Technical description of the burner
4.10 Electrical control box
Warnings
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 that the entire control box is perfectly dry!
– Static charges must be avoided since they can damage the
control box’s electronic components when touched.
Installation notes
• Check the electric wiring inside the boiler complies with the
national and local safety 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 that AC 230 V mains voltage
cables are run strictly separate from extra low-voltage cables
to avoid risks of electrical shock hazard.
Electrical characteristics
To avoid accidents, material or environmental
damage, observe the following instructions!
The control box is a safety device! Avoid opening
or modifying it, or forcing its operation. Riello
S.p.A. cannot assume any responsibility for dam-
age resulting from unauthorised interventions!
Description
Unit of
meas-
ure-
ment
Parameters
Rated power supply voltage
(range), tolerance
V A.C. 210...230, +10 -15%
Rated power supply frequency
(range), tolerance
Hz 50...60, +5%, -5%
Operation temperature °C -20...+60
Protection IP 00
Auxiliary circuit voltage V 230AC, 48DC, 5DC
Electrical input power VA 40
Extreme operating current:
- terminals V1, V2, S3
- terminals MV, SM
- terminals B4
A
Extreme length of the input signals:
- inputs T1, T2, RS
- inputs PA, PG
- input SO
m
20
1
0.5
Internal fuse F1, T4AL250V
Classification EN298 F T C L B N
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