MODULEX CONTROLLER OPERATION
37
4.4 DHW OPERATION USING A TANK SENSOR
With the Controller hinged panel closed, turn the Rotary Knob until the Faucet symbol ( ) appears
in the lower part of the display window. When there is a demand for domestic hot water (DHW), a
second Faucet symbol will be displayed. This second Faucet symbol indicates that the boiler is
currently in the DHW mode and is raising the temperature of the domestic water to the DHW set point.
Once the DHW demand has been satisfied, the boiler will switch back to the space heating mode. The
second Faucet symbol will change to a heating circuit symbol, indicating that the boiler is back in the
space heating mode.
The following procedures describe the wiring connection and Controller configuration setting needed to
provide domestic hot water (DHW) using a tank sensor installed in a thermowell.
4.4.1 Sensor Wiring Connections
To monitor the DHW temperature, connect the tank sensor wire leads to Connector 1, Terminals 6 (F6)
and 7 (GND) on the rear of the Controller. After the sensor is connected, turn the ON/OFF switch to the
OFF position, then back to the ON position. This is necessary to ensure that the Controller recognizes
the added sensor.
IMPORTANT
The tank sensor MUST be connected as described above, prior to
configuring the Controller for DHW operation. If the sensor is not
connected, many of the required sub-menu functions will not be
displayed.
4.4.2 Configuring the Controller for DHW With a Tank Sensor
Both the EXPERT and USER Menus will be used to configure the Controller for DHW production. In
addition, the DISPLAY Menu will be used to display the set point. Proceed as follows:
1. Set the
ON/OFF
switch on the front of the Modulex boiler to the
ON
position.
2. With the hinged cover of the Controller closed, turn the Rotary Knob until the Faucet symbol
(
) appears in the lower part of the of the display window.
3. Open the swing-down hinged panel of the Controller.
4. Turn the Rotary Knob clockwise to the EXPERT menu
– HOT WATER sub-menu.
5. With HOT WATER displayed, press the Program Key to enter the HOT WATER sub-menu.
6. Scroll through the HOT WATER sub-menu by turning the Rotary Knob clockwise until the THERM
INPUT function is displayed along with the currently stored setting (00 or 01). If 00 is displayed,
the Controller is already set for Sensor operation. If this is the case, skip to step 11.
7. If the THERM INPUT is currently set to 01 (Aquastat), press the Program Key to change the
THERM INPUT. The display will show
“CODE NO.”, requesting the valid code to be entered.
8. Enter code 0000 (4 zeros) by pressing the Program Key four times. The red LED will remain lit
while the four code digits are entered.
9. With THERM INPUT again displayed and the red LED lit, turn the Rotary Knob to change the
function to 00 for Sensor operation.
10. Press the Program Key to store the 00 setting for THERM INPUT. The red LED will go off.
Summary of Contents for Modulex E8
Page 1: ...Operation User Guide Modulex E8 Controller ...
Page 30: ...MODULEX CONTROLLER OPERATION 28 Figure 3 7 INSTALLATION Menu Flow Chart ...
Page 50: ......
Page 51: ...MODULEX CONTROLLER OPERATION A 1 APPENDIX A CONTROLLER MENU LISTINGS ...
