7/16 CC1B-Hints-en Preliminary 04.02.2003 HVAC Products
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 tu rns
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 pr essed.
When the When the
is pressed: is released:
-Relay 3 is -Relay 3 is
energized de-energized
-Decrease ic on -Decrease ic on
turns on turns off
-N.O. contact Q-Y2 -N.O. contact Q-Y2
closes, to drive the opens, to hold the
modulating device modulating device
down, which where it is, which
decreases the holds the
firing rate firing rate
of the burner. of the burner.
When the When the
is pressed: is released:
-Relay 2 is -Relay 2 is
energized de-energized
-Increase ic on -Increas e icon
turns on turns off
-N.O. contact Q-Y1 -N.O. contact Q-Y1
closes, to drive the opens, to hold the
modulating device modulating device
up, which where it is, whic h
increases the firing holds the firing
rate of the burner. rate of the burner.
Modulating burner, Modulating output
Press and hold for 5 seconds, and release.
The red LED ab ove the manual ic on 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 pr essed.
By design, the 0 output starts driving the modulating device to low
fire, but if you promptly press the after the red LE D above the hand
icon turns on, you can preven t the from g oing all the way.
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 ab ove the hand symb ol 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.