Riello PRESS 450 T/N, Installation, Use And Maintenance Instructions

13 

20184179

GB

Technical description of the burner

5.9

Control box RMO88...

Warning



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). Check the system is not powered
and cannot be accidentally reconnected. Failure to do this
will lead to the risk of electrocution.



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.



Press the reset button of the burner lockout command or the
reset button (by applying a force of not more than 10 N),
without the aid of tools or sharp objects.

For the safety and reliability of the control box, comply with the

following instructions:

–

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. 

Technical data

Mechanical structure

The control box is made of plastic to resist knocks, heat and
flame propagation. 
The control box contains the following components:
• a microprocessor that controls the program sequence, and a

relay for controlling the load

• an electronic flame signal amplifier
• a built-in reset button with 3 signalling colours (LED) for status

and error messages.

ATTENTION

To avoid accidents, material or environmental
damage, observe the following instructions!
The control box RMO88... is a safety device!
Avoid opening or modifying it, or forcing its opera-
tion. Riello S.p.A. cannot assume any responsibil-
ity for damage resulting from unauthorised
interventions!

Mains voltage

AC 220...240 V +10 % / -15 % 

Mains frequency

50 / 60 Hz ±6%

Power absorption 

20 VA

Protection level

IP20

Safety class 

I

Weight

approx. 260g

Cable length
Thermostat cable
Air pressure switch
Gas pressure switch
Remote reset
CPI

Max. 20 m at 100 pF/m
Max. 1 m at 100 pF/m
Max. 20 m at 100 pF/m
Max. 20 m at 100 pF/m
Max. 1 m at 100 pF/m

Environmental conditions:
Operation
Climatic conditions
Mechanical conditions
Temperature range
Humidity

DIN EN 60721-3-3
Class 3K3
Class 3M3
-20...+60°C
< 95 % r.h.

Fig. 5

S8906