operating instructions so that you can adapt the device to your needs.
Factory setting
Domestic water
Communication parameters
Heating circuit
Chilled water
Charge pump
Primary side
SERVice parameters
Flashing value in display denotes:
special/unusual status
value that can be changed
Indicators and operating controls
Front view of EQJW245
Rotary switch
Input knob
0 1 2 3 4 5 6 7 8. . 2 1 22 23 24
Times for normal mode on the current day
Time, date, setpoints, actual values etc.
Automatic mode according to weekly and calendar
switching programme. Flashing: limited/unlimited
temperature change
Controller operating in normal mode
Controller operating in reduced mode
Controller operating in standby mode.
Flashing: frost protection is active
Sensor is faulty
Heating pump for HC1, HC2 is switched on
Control unit 1, 2 is opened ( ) or closed ( )
Setpoint temperature.
Flashing: actual temperature is displayed
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Secondary side
Outside temperature
Boiler temperature
Flow temperature
Room temperature
Return temperature
Temperature of
domestic water
Heating pump
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
en Quick reference
Flow temperature
Outside temperature
Room temperature
Return temperature
Charge temperature of domestic water
Domestic-water temperature 1
Domestic-water temperature 2
Display refers to HC1 (–) or HC2 (=)
Controller is in summer mode
Calendar switching programme is currently active
Domestic water.
Flashing: increased temperature
Charge pump is switched on
An error has occurred
Rotary switch for heating circuit 1 (top)
Operating modes
Automatic mode as per
switching programme
Controller is continuously in
normal mode
Controller is continuously in
reduced mode
Controller is continuously in
standby mode
Access to manual mode for
Rotary switch for heating circuit 2 (middle)
Operating modes
Automatic mode as per
switching programme
Controller is continuously in
normal mode
Controller is continuously in
reduced mode
Controller is continuously in
standby mode
Access to manual mode for
Normal mode corresponds to nominal mode as per EN12098-1
Standby mode means that the heating is switched off and the anti-
frost function is active.
Setpoint adjustment,
normal mode
Setpoint adjustment,
reduced mode
Enter weekly and calendar
programme for heating
(Un)limited temperature
Access to SERVice,
commissioning and
communication level
Setpoint adjustment, normal
Setpoint adjustment,
reduced mode
Enter weekly and calendar
programme for heating
(Un)limited temperature
Access to logbook
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