Operating Mode Selection - Zehnder Rittling Bisque 4FE-40-55/F Fitting Instructions Manual

NOTE:
Your appliance is equipped with an integrated electronic control system
so we cannot accept any liability should the appliance be used with pilot
wire programming base units that function by disconnecting the supply
voltage (refer to the instructions supplied with your control unit).
If your radiator stops receiving instructions from the pilot wire pro-
gramming base unit, when in AUTO mode it will operate in COMFORT
mode until a new mode command is received from the programming base
unit.
CONNECTING PRINCIPLE WITHOUT PILOT WIRE (CLASS 1):
If the pilot wire is not connected, it must be insulated for safety reasons. Under
no circumstances must it be connected to earth.
N (blue or grey)
L (brown)
Pilot wire (black)
8
Neutral
Live
Z23720 Z23720
3. Operating the electronic control
3.1 Description of control unit
Function button
ON/Standby button
The ON/Stand-by button switches the regulator ON or
puts it on standby: when the device is on standby, the display
shows a flashing writing "St by" while when it is ON the display
shows time and program in the Chrono mode or the temperature
setting in the other modes.
The buzzer emits one beep after the transition from STAND-BY mode to ON
state. The beep duration is 1 second.
Viceversa after the transition from ON state to the STAND-BY one, the buzzer
emits two short beeps (0,5 s every one with a break of 0,5s between).
Also when the device is power-up, the buzzer behavior will be according the
rule above.

3.2 Operating mode selection

The device has 5 operational modes: Chrono, Pilot wire, Comfort, Eco and
Frost protection. To change the current mode, press the FUNCTION button.
Operating Lock
modes indicator
Set temperature
9