Sovelor CYNOX50G Manuel D'utilisation Et De Maintenance page 15

• Connect a gauge to the upstream pressure intake (1) and a
second gauge to the downstream pressure intake (2) of the
gas ramp;
• Start the heater and read the supply pressure on the 1st
gauge. If necessary, adjust the gas valve pressure regulator
until reaching the correct supply pressure shown on Tab. I;
Warning
The gas valve group is set for a maximum supply pressure
of:
• 60 mbar for SIT 830 valve
• 200 mbar for Honeywell VR 420 valve.
If the supply pressure exceeds this value, the valve safety
membrane may break and permanently block the valve.
4
2
6
1
SIT 830 valve
6
3
2
Honeywell VR 420 valve
• Read the work pressure on the 2nd gauge. If necessary, use
a screwdriver to adjust the gas valve pressure regulator (3)
to restore the work pressure shown on Tab. I or to restore
correct combustion values (see paragraph 4.8);
• If necessary, you can change the valve opening speed for
heaters equipped with a Honeywell or SIT valve group by
turning the adjustment screw (6): turn counterclockwise to
increase opening speed, clockwise to decrease the speed.
• Apply the adhesive label with the words "SET UP FOR ......" on
the gas valve group to specify the type of fuel and the new
category chosen.
You can continue and start up the heater only after it has been
L-L 195.00-BM
3
5
1
4
5
EN
prepared it according to the instructions for the work category to be
used.
4.8. REGULATING COMBUSTION AND ANALYSING COMBUSTION
PRODUCTS
Warning
The factory setting of the burner is indicated in the
"TECHNICAL SPECIFICATIONS TABLE".
You may have to change the setting due to the fuel used and/or
installation conditions (high altitude, air suction pipe with or without
Snorkel) if combustion parameters are not correct.
The sensor used to periodically check combustion and smoke
temperature must be positioned as follows:
Combustion is clean and stable when combustion values are as
follows:
Oxygen (O
Excess air: 25 ÷ 40 %
When inspection tests are completed, the hole drilled for the probe
must be sealed with a material that is resistant to high
temperatures and that ensures the tube remains airtight.
5. OPERATING INSTRUCTIONS
5.1. START
To start the heater:
• Make sure the switch (a) is set to "0";
• Power the heater electrically by switching on the isolation switch
on the power switch board: red lamp (b) lights to signal that the
board is live;
• Press switch (a) to position
prewash cycle and, when the flame lights, lamp (f) lights as well;
after the combustion chamber has heated for a few minutes, the
main fan starts;
• If the heater does not work during the start cycle or work cycle,
consult "TROUBLESHOOTING" to find the cause of the
malfunction.
Warning
In case of safety stop, you have to push the reset button
(d) for 3 seconds to restart the heater.
Warning
NEVER do more than two restarts in a row: unburned fuel
can accumulate in the combustion chamber and suddenly
flare up at the next restart.
5.2. STOP
To stop the heater turn and press switch (a) to "0" position or, if the
heater is in automatic mode, by setting the room thermostat to a
): 4 ÷ 6 %
2
: the burner begins the start and
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