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Operation
Chapter 3. EXPLANATION OF OPERATION
Operation
FRS100 Operation
Equipment State
Power switch ON,
• Power is applied across the 100V or 200V and 0V
limit switch ON
power terminals on the equipment (the POWER LED
lights up).
Operation contact ON • Start check is carried out by energizing terminal 7,
Ready for ignition.
and the 1K relay turns ON (the start check LED lights
up). If there is a false flame, the 1K relay does not
output to terminals 4 and 8 as it is not energized, and
the ignition operation is not started.
Ignition switch ON
• Voltage is applied to the pilot valve and ignition
(Do not leave ignition
transformer from terminal 8, initiating each of their
switch ON. Pilot
operations.
burner normally lights • When the flame detector detects the pilot burner flame,
in 5 to 10 seconds.)
the 2K relay turns ON (the FLAME LED lights up).
Ignition switch OFF
• The pilot valve is held open from terminal 4 via the 1K Ignition transformer
and 2K contacts.
stops.
• The main valve is energized by resetting the ignition
Pilot valve opens.
switch contact.
Main valve opens.
Operation contact
• The pilot valve, main valve and combustion lamp
Pilot valve closes.
are de-energized and operation stops. (The start
Main valve closes.
check LED and FLAME LED go out.)
Combustion lamp out.
Flame failure
• The 2K relay becomes de-energized after the flame
Pilot valve closes.
response; the combustion lamp goes out; the main
Main valve closes.
valve closes; the pilot valve closes; and the equipment Combustion lamp out.
stands by for re-ignition. (the FLAME LED goes out.)
