
In delivery condition, the remote control is registered to radio Channel 50. We recommand changing this channel
at the initial installation.
1. Make sure that the power supply to the water heater is switched on (fuse) and that the LED of the MCX
display, the LCD of the CEX/DEX/DSX displayshows the latest set value.
2. After inserting the batteries, the display indicates all symbols for about 4 seconds. During this time, press and
hold the arrow keys and for a short time. Then the display shows the current channel (1 to 99) and a
flashing radio symbol.
3. Using the arrow keys and chooses the desired channel. Press key to confirm the selected channel
number. The display changes to registration mode and shows “--“as well as a flashing radio symbol.
4. Place the remote control directly in front of the water heater.
5. The display switches to the setpoint display.
Note: For initial installation we basically recommend to change to a new channel.
In the case of an unsuccessful registration the display indicates “no” by a flashing radio signal after 45 seconds.
The remote control quits the registration process and switches to standby mode. By pressing a key the registration
process will be repeated.
If the registration is impossible after a number of trails, check the pinning position of the transmission unit.
Notes:
• With no remote control registered or without working radio connection, the water heater heats to the prior
selected set value.
6. Initial operation
2.2 Mounting the transmission unit inside a DEX / DSX
Attention!
Before assembling the transmission unit disconnect the instantaneous
water heater from the mains supply!
Pay attention to the proper position of the connector!
The connector has to be fitted into the notch properly.
5. Installation
Figure 4:
Installation of transmission unit
P.10 P.11