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Maxitrol EXA Star Controller
Connections
Step 1: Remove 2 screws holding cover.
Step 2: Connect switched OFF 24V (AC/DC) power source
to terminals 3 and 4. Note polarity when using a
DC power source or if one leg of an AC transformer
secondary is externally grounded or is sharing power
with another half-wave device.
Step 3: Set DIP switches to match available control signal.
Step 4: Connect switched OFF control signal to terminals 1
and 2. Observe polarity. Note that the return, or signal
ground, must be connected to terminal 2.
Step 5: Switch power and control signal ON.
Step 6: Set valve (see "Valve Setting" in section below).
Step 7: Replace cover.
Valve Setting
The EXA STAR modulating valve series has two (2) buttons
and a communication LED for the user interface. The buttons
are used to set the valve for high and low fire settings (see
Figure W).
1. High Fire Setting (LED will be solid red)
2. Low Fire Setting (LED will be blinking red)
3. Operating Mode (LED will be OFF)
High Fire Setting - Button #1
To enter high fire setting mode, press and hold button #1 until
the LED lights solid red. Release. The valve is now in the high
fire setting mode. Buttons #1 and #2 are used to set desired
high fire setting.
Press or hold Button #1 to increase gas flow. Each button
press equates to the minimum available step size and will
increase flow slowly. Holding the button down auto steps and
eliminates the need to repeatedly press the button. Use this
feature to rapidly increase the flow.
Press or hold Button #2 to decrease gas flow. Each button
press equates to the minimum available step size and will
decrease flow slowly. Holding the button down auto steps and
eliminates the need to repeatedly press the button. Use this
feature to rapidly decrease the flow.
To save the high fire setting, simultaneously hold Buttons #1
and #2 until the LED turns OFF.
NOTE: Controls left in any setting mode will default to the
current settings and return to normal operating mode
after 5 minutes of inactivity.
IM 1287 • REBEL APPLIED ROOFTOP
Low Fire Setting - Button #2
To enter low fire setting mode, press and hold button #2 until
the LED light blinks red. Release. The valve is now in the
low fire setting mode. Buttons #1 and #2 are used to set the
desired low fire setting.
Press or hold Button #2 to decrease gas flow. Each button
press equates to the minimum available step size and will
decrease flow slowly. Holding the button down auto steps and
eliminates the need to repeatedly press the button. Use this
feature to rapidly decrease the flow.
Press or hold Button #1 to increase gas flow. Each button
press equates to the minimum available step size and will
increase flow slowly. Holding the button down auto steps and
eliminates the need to repeatedly press the button. Use this
feature to rapidly increase the flow.
To save the low fire setting, simultaneously hold Buttons #1
and #2 until the blinking LED turns OFF.
NOTE: Controls left in any setting mode will default to the
current settings and return to normal operating mode
after 5 minutes of inactivity.
Figure 85: Maxitrol EXA Star LEDs
96
Unit Maintenance
www.DaikinApplied.com
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