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1 - Main switch ON- OFF
2 - Thermostatic line switch
3 - BT 320 Display
4 - Confirm or RESET key
5 - Programming keys
6 - Fan block warning light
7- Equipment shut-down warning light
DETAIL OF THROTTLE VALVE FOR GAS FLOW REGULATION
BY MEANS OF SERVOMOTOR
A) Butterfly gas valve position reference index
B) Gas modulation servo motor
STARTING UP AND REGULATION
• Bleed out the air contained in the gas piping, with due precautions
and with doors and windows open.
• Wait the time necessary for the gas in the room to disperse outside.
Re-connect the burner to the gas pipeline.
• Make sure that the mains voltage corresponds to the manufacturer's
requirements and that all electrical connections made at the
installation site are effected properly as illustrated in our wiring
diagram.
• Check that there is water in the boiler and that the gate valves of
the system are open.
• Make sure that the combustion products may be freely vented
through the boiler and flue dampers.
• Make sure that the combustion head is long enough to enter the
furnace following the measure specified by the boiler manufacturer.
• Apply a pressure gauge of appropriate scale to the pressure intake
on the gas pressure switch. If the foreseen amount of pressure
allows it, it is better to use a water column instrument. Do not use
dial instruments for average pressures.
• Now switch on the main switch. This powers on the control device,
and the programmer turns on the burner as described in the
chapter "Operation description". For burner adjustment, refer to the
instructions for the electronic cam supplied.
• After having adjusted the “minimum”, (200) turn the burner
gradually to maximum, by using the controls on the electronic cam
keyboard.
• We recommend that you check combustion using the appropriate
instrument at all intermediate points on the modulation route (from
200 to 999), checking the gas flow rate by reading the meter.
• It is essential to check, with a suitable instrument, that the
percentage of carbon monoxide (CO) present in the fumes does
not exceed the limit set by regulations at the time of installation.
• Now check the proper automatic operation of modulation. This
ensures that the equipment receives the signal from the electronic
modulation regulator, if the burner is the modulating model, or from
the second stage thermostat or pressure switch, if it is a two stage
progressive burner.
The air pressure switch stops the equipment operation if air pressure
is not at the expected value.
The pressure switch must therefore be adjusted so that it is triggered
to close the NO (normally open) contact when the air pressure in the
burner reaches a particular value.
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