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The start and end of the charging time are
determined by the electricity supply utility
(EVU) concerned.
Two integrated protective temperature
regulators (N4, N5) and a safety thermal
cut-out (F1) prevent the appliance from
overheating. While the protective tempera-
ture regulator switches itself off again auto-
matically, the safety thermal cut-out must
be switched on again by a qualified installer
by pressing the button located in the mid-
dle on the safety thermal cut-out.
The heat which is stored in this way is then
emitted with the help of a blower fan,
and partially also via the surface of the
appliance. In this situation, the room air
is sucked in by the fan (M1) through the
air inlet grille (5) and blown through the
air ducts of the storage blocks (8), causing
them to be heated.
Before emerging through the air outlet
grille (4), the air, heated in this way, is mixed
with colder room air via two mixed air flaps,
in order to ensure that the emerging air
does not exceed the permitted maximum
tempe ra ture. The setting of the mixed air
flap, and therefore of the mixing propor-
tions of the air, is regulated by means of a
bi-metallic regulator.
2.2.2Reducing the connected load
By relocating or removing bridges at the
connection terminals, the connected load,
which is wired at the factory to be 100%,
can be reduced in conjunction with a load
degree reduction device on the charging
regulator by 3 output stages (see below).
The dimensions of the lead cross-section
and the fuses are to be selected in accord-
ance with the maximum possible load of
the appliance.
100 % P
(Serienverdrahtung)
N
1
3
2
1
L3 L2 L1
N L3 L2 L1
3/N/PE ~ 400 V
91,6% P
N
2
3
2
1
L3 L2 L1
L1
N L3 L2
3/N/PE ~ 400 V
83,3% P
N
3
3
2
1
L3 L2 L1
N L3 L2 L1
3/N/PE ~ 400 V
75% P
N
4
3
2
1
L3 L2 L1
L3 L2 L1
3/PE ~ 400 V
100 % P
£ 2kW
N
5
3
2
1
L3 L2 L1
N
L1
1/N/PE ~ 230 V
Reducing the degree of charge
Located on the electronic charge regulator
(A1) is the plug-in bridge X17, with which
the degree of charge of the storage part
can be selected in conjunction with the
changeable connection load to four set-
tings (I, II, II or IV). A charge degree of 100%
(Position I) is preselected at the factory.
If the plug-in bridge is plugged into anoth-
er position, this results in a reduced degree
of charge (the disconnection temperature
of the electronic charge regulator will be
reduced).
2.2.3 Electronic charge regulator
Fault behaviour
The charge regulator in the appliance is set
at the factory to „Positive fault behaviour
(80% PS)"; i.e. in the event of defective
charge control (such as failure of the con-
trol signal), the appliance will receive a full
charge loading.
It is possible to switch over to „Negative
fault behaviour" (no charging of the storage
unit) by replugging the plug-in bridge X16
to the „80 % PS" position, if the appliance is
connected to a digital charging control unit.
Operation with charge control
The relevant parts of the instructions for
installation and use for the charging control
system are to be followed in this situation.
Control signal
The electronic charging regulator can be
connected to different control signals (ED)
from control units, and can therefore be
integrated into existing older systems. At
the factory, the appliance is set for an AC
control signal (alternating current voltage
signal at the setting at the terminals „A1 +
A2") with 80 % ED.
A1
X1
X16
X1
X17
V4
X1
Connection
variants
X1
Types
ETT 350
ETT 500
X1
X15
X14
X13
100 % 91,6 % 83,3 % 75 %
8h heating elements
3,5
3,21
2,92
2,63
5,0
4,58
4,16
3,75
By replugging the plug-in bridge X16, other
ED signals (68/72, 37/40 %) can be selected.
This is necessary if the appliance is being
integrated into an already existing system
which controls the charging with one of the
ED signals mentioned.
Connection to a DC control signal (X3)
If a charge control device with a DC control
signal (direct current voltage 0.91 V - 1.43
V) is installed in the appliance, the control
signal must be connected to the control
terminals „DC A1/Z1 (positive terminal) and
DC A2/Z2 (negative terminal)" which are
covered over at the factory (ensure that po-
larity is correct).
The 230 V AC control signal must
not be connected to the „DC+ (A1/
Z1) and DC- (A2/Z2)" terminals, since this
would destroy the charging regulator.
Operation and fault display (V4) on the
electronic charging regulator
LED lights up „green" ⇒ No faults
the charging regulator is working per-
fectly.
LED lights up „red" ⇒ Fault
a) Selector switch for charging (R1) and/
or remote sensor (B1) is defective or
not connected.
b) Plug-in bridge X17 for charge reduc-
tion is missing.
No charging will take place.
LED lights up „orange" ⇒ Fault
(only with discharge regulator fitted):
a) Internal discharge regulator (A2) defec-
tive.
b) Room temperature sensor (B2) defec-
tive or not connected.
No discharging will take place.
c) Selector switch for discharge (R2) is de-
fective or not connected.
X12
X11
X10
100 %
3,5
5,0
19
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