ii
WARNING
Before removing, mounting or wiring the FRS100, be sure to turn the
power OFF. Failure to do so might cause electric shock.
Do not touch the terminals on this control. Doing so might result in an
electric shock.
This control is for batch operation (at least one start and stop in 24 hours
of operation) that utilizes the start check function.
Do not use this control for continuous operation (combustion for 24
hours or longer). Instead, use a self-checking Protectorelay (AUR300,
AUR350, AUR450, or R4332B, etc.), which continuously checks the
flame detector and flame detector circuit, and use a compatible flame
detector (AUD300, or C7076, etc.).
This control does not have the prepurge timing and sequencing
functions necessary for burner ignition. Take timer and sequence
functions into consideration when designing your control system.
Do not connect the solenoid valve to the voltage side.
If a ground fault occurs, ground current will flow to the solenoid valve
and open it, causing fuel to flow regardless of the state of this control.
Prevent the pilot and main burner ignition times from exceeding the
burner ignition time which the equipment manufacturer specifies.
Excessively long ignition time might cause fuel to accumulate in the
combustion chamber and an explosive air-fuel mix to form, resulting in
the risk of a serious explosion.
Before carrying out the pilot turndown test or ignition spark response
test, be sure that all manual fuel valves are closed.
Do not operate the control without completing the tests described in
this chapter and the tests specified by the equipment manufacturer.
If the flame detector is set so that it detects a pilot flame that is too
small to ignite the main burner, this control will not be able to recognize
a flame failure in the main burner. In this case, fuel would continue to
be supplied, causing a serious explosion hazard. Be sure to carry out
the pilot turndown test carefully.
If the pilot turndown test must be carried out repeatedly, completely
shut down all equipment each time the test is finished, and completely
discharge unburned gas or fuel that has accumulated in the smoke
ducts and combustion chamber. Failure to discharge unburned gas or
fuel may result in an explosion.
