AERCO Modulex E8 Controller (and BCM) For Modulex EXT Boilers - Manual (Page 66)

E8 Controller and BCM for Modulex EXT
Installation, Operation & Maintenance Manual
CHAPTER 6: E8 SETUP & PROGRAMMING
Page 66 of 108 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0093_0A
PRI: 06/24/2013 Phone: 800-526-0288 GF-136-C
T1 and T2 Settings: The previous steps set the U1 and U2 voltages which will be used to scale
the minimum and maximum set point levels. To set the minimum (T1) and maximum (T2) set
point temperatures which correspond to the U1 and U2 voltage levels, follow instructions below.
Voltage & Set Point Limits: T1 & T2
1. Turn the Rotary Knob clockwise and scroll to CURVE 11-T1. This will be the minimum set
point temperature.
2. Press the Program Key. The red LED will light.
3. Enter the desired low set point temperature limit for T1 by turning the Rotary Knob. The
selected T1 value will correspond to U1.
4. With the desired low set point temperature limit displayed, press the Program Key to set
the T1 temperature (low set point limit). The red LED will go off.
5. Finally, turn the Rotary Knob clockwise and scroll to CURVE 11-T2. This will be the
maximum set point temperature.
6. Press the Program Key. The red LED will light.
7. Enter the desired high set point temperature limit for T2 by turning the Rotary Knob. The
selected T2 value will correspond to U2.
8. With the desired high set point temperature limit displayed, press the Program Key to set
the T2 temperature (high set point limit). The red LED will go off.
This completes the required steps for setting the low and high limits corresponding to the set
point voltage and temperature functions. Proceed immediately to Section 6.3.4 to set the
CURVE 11-UO voltage.
6.3.4 Setting the Curve 11-UO Voltage
UO is a voltage level that will turn off the boiler. Therefore, the UO voltage level must be set
below the limit set for the U1 voltage. For example; if U1 is set for 1 Volt, UO should be set to
0.9 Volt (or lower). After setting the low and high set point limits as described in Section 6.3.3,
set the UO voltage per instructions below.
Setting Curve 11-UO Voltage
1. Turn the Rotary Knob clockwise and scroll to CURVE 11-UO.
2. Press the Program Key. The red LED will light.
3. Using the Rotary Knob, adjust the UO voltage to below the voltage set for U1.
4. With UO set to the desired value, press the Program Key to store the setting. The red LED
will go off.
5. This completes all of the required entries for operation in the 0 to 10 Volt Remote Set Point
Mode.
6. To exit the EXPERT menu – INSTALLATION sub-menu, continue scrolling using the
Rotary Knob until RETURN is displayed.
7. Press the Program Key to return to exit the INSTALLATION sub-menu.
To view the remote set point temperature, proceed to Section 6.3.5.