REMEHA GAS 460 S, Technical Instructions

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06/02/06 - 300005247-001-B Remeha Gas 460 S
Operation
1 Furnace operation equipped with safety box RV 00 54 / 000 00
Operating principle
The boiler can operate at either 2nd stage or 1st stage depending on
the thermal needs of the installation.
The ignition and burner surveillance sequences are ensured by the
safety box.
Behaviour in normal conditions
The box closes the TCH contact when there is a requirement for
heat1. The safety control box runs an auto-check of around 1
second(s) by lighting the alarm warning light
VA .
In the case of an offset alarm, it is necessary to use a timed
relay in order to prevent an unjustified alarm signal.
After a waiting time tw , the ignition transformer TA produces a series
of sparks at the ignition electrode. After a pre-ignition period tvz , the
ignition burner valve VG and the safety valve VS open. Formation of
flame in ignition burner. The ionisation sensor SF shows a flame
signal with a minimum ionisation current of 1 µA and ignition is shut
down. After a period of stabilisation
tstab , the principal burner ignites
at 1st stage BR1 (or at 2nd stage if the 2nd stage thermostat TCH2
is needed).
Behaviour in abnormal conditions
- If a flame is not detected before the safety time ts, the box makes
2 more ignition attempts. If, at the end of the last attempt, there is
still no flame signal, the box goes into safety and the safety
indicator comes on. To restart the heater, press the reset button on
the safety box.
- If there is a loss of flame in normal operation, the box automatically
repeats the start up sequence.
Resetting
The box is reset after going into safety by pressing the reset button.
If the reset button does not work, wait at least 15 seconds before
trying a second time. After activating the reset button, the warning
light goes out and the safety control box restarts
after a waiting time
of around 1 minute .
Note 1 : The box may be on safety on its first start up: press the reset
button to release it.
Note 2 : If the reset button is pressed in normal operation, the gas
valves close and the box starts a new ignition sequence.