Water Connection; Electrical Connection; First Start-Up; Maintenance - STIEBEL ELTRON SHZ 30 LCD Gebrauchs- Und Montageanweisung

2.7 Water connection

Unvented (pressurized) for the
supply of several draw-off points.
– IInstall the type-tested safety groups
KV 30, order no. 00 08 26, up to
0.48 Mpa mains water pressure.
KV 40, order no. 00 08 28, up to 1 Mpa
mains water pressure.
a Safety valve
b Backflow prevention unit
c Test valve
d Throughflow isolating valve (choke)
e Pressure reducer (with KV 40)
f Test nozzle for pressure gauge
g Thermostat fitting TA 260
Order no. 00 34 66 (order
separately), also possible in conjunction
with KV40
– Establish dimensions for the outflow pipe
for a fully opened safety valve. The blow-
off aperture of the safety valve must
remain open to the atmosphere.
– The blow-off pipe of the safety group is to
be installed with a permanently downward
inclination.
– The guidance contained in the safety
group installation instructions is to be
observed.
– Set a maximum flow rate of 18 l/min at
the choke unit of the safety group.
Vented (pressureless) for the supply
of one draw-off point
The units are suitable for vented
(pressureless) operating mode.
Do not block off drain and fittings
pivot arm.
– In the case of this installation, the Stiebel
Eltron fittings for vented wall-mounted
G
water heaters are to be used.
– Before connecting the fitting, the water
pipe must be thoroughly flushed through.
– Expansion water drips out of the outlet
during each heating-up process.
– For use, installation, first start-up, and
maintenance, the same instructions apply
as for the operation of unvented
(pressurized) water heaters.

2.8 Electrical connection

L M N O
Remove the lower cover of the unit by
H
unscrewing the screws .
Prepare the electrical connecting cable
Connect the desired output in accordance
with the connection examples and set the
sliding switches on the electronics board
D
( 34 / 35).
1
Operating mode :
E
Z
E B
E Z B
E - Single- Z - Dual-
circuit circuit
B
Z
B
2
Leistung
1 2 3
F
If or
1
disconnection from the mains supply
is necessary.
Following electrical connection, the
following steps are to be taken:
1. The unit rating plate is to be marked
with a ball-point pen, as follows:
Place a cross in the box which
corresponds to the connection power
supply and voltage.
2. Plug the 5 pole connector of the
connection cable (33) into the
„control unit „ electronic module (
33), position "X2" .
3. Fit the lower cover and secure with
screws.
Electrical circuit diagram
A remote control for the rapid heating
(39) is to be connected by the customer
to the unit connection terminal „6". Any
„L " phase can be connected; without
FB
power transfer.
Dual-circuit connection
1 :
Switch
Single counter measurement
Electricity supply company contact
(40), any „L
without power transfer.
Dual-counter measurement
Important note: in the case of
the „special switching mode" in
dual-circuit operation with dual-
counter measurement, when
1/N/PE ~ 230 V without externally
installed contactors: see page 13.
Single circuit connection
1 :
Switch
Boiler operation
1 :
Switch

2.9 First start-up

(may only be carried out by a qualified
installer)
I
.
Fill the unit, deaerate it, and
1
flush it through thoroughly.
1
2
1
Switch on the mains power
2
3
supply.
2
E
3
1
4
Check the operating mode of
3
4
2
5
the unit and if appropriate press
Z
4
5
the rapid heating button (1).
3
6
5
6
Check the safety group for
4
7
E Z B
6
B - Boiler
functional performance (in the
7
5 8
case of unvented operating mode).
7
8
6 9
8
9
10 7
9
10
11
8
10
11
12
9
11
12
13
10
:
1 2 3 1 2 3
are changed over,
2
H
L
E
E Z B
M
B
" phase can be connected;
F
N
O
E
E Z B
O
Z
Z
E Z B
B
Notes:
Condition as supplied:
– setpoint temperature setting 65 °C
– temperature limitation „off"
– automatic limescale display „on"
At temperatures of below - 15°C (e.g
transportation/storage) the safety thermal
cut-out may trip. Press the reset button
D
( 22).
Handing over the unit
Explain the function of the unit to the user
and familiarise him or her with its use.
Important notes:
• Advise the user about possible hazards
(scalding).
• Hand over these Operating and Installati-
on Instructions for safekeeping. All the
information provided in these instructions
must be followed carefully. They provide
details concerning the safety, operation,
installation, and maintenance of the unit.

2.10 Maintenance

When carrying out any work, disconnect
all poles of the unit from the mains supply.
Check the safety group regularly.
Further notes on the unit:
If the limescale display „Ca" appears,
descaling of the heating element is
recommended. Descale the heating
element after dismantling. A descaled
heating element or a changed heating
element is detected automatically, and the
limescale display „Ca" is extinguished
when the unit is brought back into
operation. Do not treat the reservoir
surface and the parasitic current anode
with descaling agents.
Safety device:
J
Observe immersion depth
safety thermal cut-out.
Draining the storage water heater:
– Close the isolating valve in the cold
water feed pipe.
– Fully open the hot water fittings at all
the draw-off points.
– Twist off the cap from the drain nozzle
D
( 26).
Hot water may exit the unit during
draining.
The corrosion protection resistor
the insulating plate must not be damaged
or removed during servicing work. When
replacing the corrosion protection resistor,
the assembly is to be reassembled in the
correct manner.
a Copper heating element
b Insulating plate
c Pressure plate
d Corrosion protection resistor
of the
K
on
19