10
DEX & DBX Installation, Maintenance and User Instructions - April 2011
Mode
Description
Normal operation,
0
manufacturer’s
setting
Operation with
1
normal load
shedding relay
Operation with
2
sensitive load
shedding relay
Fig 7
Fig 8
Load shedding relay
(Model DEX only)
If further three-phase appliances are connected,
a load shedding relay (IN82250) can be connected
to phase conductor L2.
A special operating mode must be selected on
the appliance by pressing the four function keys
simultaneously until the required mode (0, 1 or 2)
is shown on the display then releasing the keys.
First select mode 1 to check correct operation of
the load shedding relay at low appliance output
(35° setpoint and low water flow rate).
Select mode 2 if the load shedding relay flickers.
Electrical connection from below
Check that the power supply is switched off
prior to electrical connection!
1. Remove inner and outer insulation from the
connecting cable to the lengths shown in Fig 7.
2. With the smaller opening foremost, slide the
water splash protection sleeve over the
connecting cable until the sleeve is flush with
the wall. This prevents any water leaks from
coming into contact with the electrical leads.
The protection sleeve must be used and free
from damage.
3. Open the control panel to the right.
4. Fit the connecting cables into the terminal block
according to the wiring diagram on page 9.
Ensure all connections are fully tightened and
secure.
5. The appliance must be earthed.
6. Pull the protection sleeve over the connecting
cables until it fits in the recess of the
intermediate panel.
7. Close the control panel.
8. Re-fit the appliance cover and secure with the
fixing screw before re-fitting the fascia panel.
Note: If required, the terminal block can be
re-positioned in the upper part of the appliance.
In this case the instructions in the following
section should be followed.
DBX DEX qxd:Varipoint qxd 20/5/11 13:34 Page 10
