Stiebel Eltron RTI-E3 Mode D'emploi page 8

1. Operating instructions
RTI-E3
The RTI-E3 is an electronic 2-point control
unit; i.e. the blower of the storage heater is
switched on by the RTI-E3, operated at a cons-
tant speed, and then switched off again.
RTI-EP2
The RTI-EP2 is an electronic proportional con-
trol unit; i.e. the speed of the storage heater
blower motor is steplessly adjusted by the RTI-
EP2 to suit the heat requirement.
In this situation, the speed regulation of the
blower motor is effected as a function of the
difference between the room temperature
(the actual temperature) and the temperature
which has been set at the selector button R2
(the reference temperature). The smaller this
difference, the lower the speed of the blower
motor.
However, if the storage heater is being ope-
rated with a supplementary heating system,
then the RTI-EP2 automatically switches over
to a 2-point control arrangement; i.e. if heat is
being given off, then the blower motors only
run at full capacity. If the supplementary hea-
ting is switched off by means of the switch on
the operating panel, then the RTI-EP2 again
operates as a proportional control unit.
2. Installation instructions
The discharge control unit must be installed by
an approved qualified installer, following the-
se Operating and Installation Instructions as
well as the instructions for the storage heater.
All electrical connection and installation
work is to be carried out in accordance with
VDE 0100 provisions, the regulations of the
electricity supply utility companies concerned,
and the corresponding national and regional
regulations.
2.1 Packing unit
1 discharge control unit with
– connection lead for charge and discharge
control unit
– 6-pin plug connector with cable harness
1 ON/OFF switch
1 adjuster (potentiometer) with connection
lead
1 temperature selector button
1 set of operating and installation instructions
1 room temperature sensor with 2 screws
2 separate switch leads for switches
2.2 Installation
Before starting installation work, isolate the
storage heater from the electricity supply.
8
for the user and the professional
1.1 Mode of operation
The discharge control unit is switched on and
off by means of the S2 switch on the control
panel of the storage heater (ON = " ").
The room temperature desired can be ste-
plessly adjusted between about 5 to 35 °C by
means of the R2 selector button on the opera-
ting panel. If the selector button is in the cen-
tral position, the room temperature will be kept
to a constant temperature of about 20 °C.
If the room temperature drops below the pre-
set value, the discharge control unit automa-
tically switches on the storage heater blower
motors, so that the stored heat is blown into
the room.
After adjusting the temperature it may last y
few minutes before the blower will start due
to technical reasons.
On very cold days, it is recommended that the
discharge control unit be switched on if no-
one is going to be present for several days, in
order to keep the room temperature at about
10 °C, for example, so as to prevent the buil-
ding or the room from becoming too cold (to
protect against freezing).
Night-time heating reduction
By utilising an external switch or timeclock, a
temperature reduction of approx. 4 K can be
achieved.
for the professional
When connecting the storage heater to
an automatic charging control device, it
is possible, even with the fuses removed, that
voltage will still be present at the terminals
A1/Z1 - A2/Z2.
If several storage heaters are being set up next
to one another, care is to be taken to ensure
that the discharge control unit is installed in
the right-hand outer device. This guarantees
that the room temperature can be detected
without any problem.
Briefly the most important
Selector button -
R2
room temperature
2.2.1 Installation sequence
⇒ Remove the air outlet and inlet grilles,
the front wall, and the right side wall, as
described in the installation instructions for
the storage heater.
⇒ Push the blind cap for the switch (20) and
temperature selector button (21) out of the
operating panel from the switchbox side,
using a mechanical aid.
⇒ Push the ON/OFF switch (S2) with the „flat
plug upwards" into the operating panel
from the front.
20
21
ON/OFF switch -
S2
thermostat
Selector button -
charging
S2
R2