Cuenod NC9 GX207/8, Operating Instructions Manual

Page: 47 / 60

47
06/2004 - Art.Nr. 13 011 288C
Start-up
Unit SG 513 operating diagram
GAS control and safety unit with non
continuous operation SG 513
is an appliance of which the programme
is managed by a microcontroller. It also
integrates the defect analysis through
coded luminous signals.
When the unit is defective, button
R
lights on. The defect code appears
every ten seconds until the resetting of
the unit.
Further investigations are possible by
reading the microcontroller non volatile
memory.
The unit ceases to function when the
voltage falls below the required
minimum value. It restarts automatically
when the normal voltage is restored.
A thermostatically controlled
switching off is compulsory every
twenty four hours.
m
The removal and setting up of the
unit take place with the unit
de-energised. The unit must be
neither opened nor repaired.
Code Description of the defect
x H y y y y
No flame signal at the end of the safety time delay.
x x H y y y
Stray light during the preventilation and the firing.
x x x H y y
Air pressure switch: the contact does not close.
x x x x H y
Air pressure switch: the contact opens on start-up or in service.
y y H x x x
Air pressure switch: the contact is sticked.
y y y y H x
Flame extinguishing in service.
x x H y y y
—
y y y y y
The unit has been locked purposely.
Code
x
y
H
—
Key word
Short luminous signal
Long luminous signal
Short break
Long break
Push on R
during ...
… causes ...
… less than 9
seconds ... release or locking
of the control unit.
… between 9
and 13 seconds
... Erasing of the
statistics.
… more than
13 seconds ... no effect on the
control unit.
Required input signals
Output signals
Limiter Air pressure switch Burner motor Gas valve Regulator Ignition transformer Flame Servomotor Trouble Reset
Powering up unit, motor and S.M.
2 Checking if air is present
3 End of preventilation
4 Powering up ignition transformer and end
of preventilation
5 Powering up gas valve
6 Checking if flame is present
7 Powering up S.M. and gas valve; operation state
0 Regulator stop
10 Trouble mode
tlw Air pressure switch standby time
tlk Damper motor opening time and preventilation
count down
tr Damper motor closing time
tvz Preignition time
ts
Safety time
tv2 Minimum time between gas valve 1 and 2
EN