Siemens RWF40 Manual operation …, Modulating burner, 3-Position output, To exit manual operation

2. Hints

2.6 Manual operation continued…

Modulating burner, 3-Position output

Press and hold for 5 seconds, and release.

The red LED above the manual icon turns on to indicate that the controller is now in the manual mode.

Relay 2 and relay 3 will hold their current state, (energized or de-energized) that they were in until another key is pressed.

Modulating burner, Modulating output

Press and hold for 5 seconds, and release.

The red LED above the manual icon turns on to indicate that the controller is now in the manual mode.

Relay 2 and relay 3 will hold their current state, (energized or de-energized) that they were in until another key is pressed.

By design, the 0 output starts driving the modulating device to low fire, but if you promptly press the after the red LED above the hand icon turns on, you can prevent the from going all the way.

When the is pressed: -Relay 3 is energized -Decrease icon turns on

-N.O. contact Q-Y2 closes, to drive the modulating device down, which decreases the firing rate

of the burner.

When the is pressed: -Relay 2 is energized -Increase icon turns on

-N.O. contact Q-Y1 closes, to drive the modulating device up, which increases the firing rate of the burner.

When the is released: -Relay 3 is de-energized-Decrease icon turns off

-N.O. contact Q-Y2 opens, to hold the modulating device where it is, which holds the

firing rate

of the burner.

When the is released: -Relay 2 is de-energized-Increase icon turns off

-N.O. contact Q-Y1 opens, to hold the modulating device where it is, which holds the firing rate of the burner.

When the	When the
is pressed,	is released,
the output value	output value,
starts increasing,	stops increasing,
and the output,	and the output,
to terminals	to terminals
X1+ and X1-	X1+ and X1- also
starts increasing,	stops increasing,
the same amount,	and holds
and increases	the current
the firing rate	firing rate
of the burner.	of the burner.
When the	When the
is pressed,	is released,
the output value	output value,
starts decreasing,	stops decreasing,
and the output,	and the output,
to terminals	to terminals
X1+ and X1-	X1+ and X1- also
starts decreasing,	stops decreasing,
the same amount,	and holds
and decreases	the current
the firing rate	firing rate
of the burner.	of the burner.

To exit manual operation

Press for 5 seconds, and release.

The red LED above the hand symbol turns off, and the controller returns to the automatic mode.

On Modulating burners, with modulating output, the output to terminals X1 and X2,

also returns to automatic operation.

On Modulating burners, with 3-position output, the output to relay 2 and relay 3,

also returns to automatic operation.

7/16 CC1B-Hints-en Preliminary 04.02.2003 HVAC Products