13
(de-presurised) operation.
Closed (pressurised) operation appropriate safety valve combinations, or rather, safety valve
combinations with a pressure reducing valve, are to be installed.See assembly preparations
(page I).
In closed operation, the pressure relief valve must actuated regularly to check its function and
to remove limescale deposits (fig. 2):
Turn venting screw until a jet of water is expelled. Close the venting screw again. If the safety
valve is not working, contact the after-sales service.
Open (de-pressurised) operation
An appropriate overflow mixer unit is to be installed: see assembly preparations (page I).
- The hot water wall storage unit may only be installed in a frost free room.
- Disconnect the power cable and shut off the water supply before assembly!
- Perform the electrical connection only after the water connection.
- Only create openings which are necessary for the assembly.When refitting, unused
openings must be sealed watertight.
- Voltage carrying parts has to be untouchable after the assembly.
• It is normal for water to trickle from the pressure safety device during the heating phase; for
this reason, it is necessary to connect the outlet, which must always be left exposed to the
atmosphere, to a drainage pipe that slopes downwards and located in an area not subject to
ice.
• During heating, displaced water must drop from the discharge of the safety valve (closed
operation) or out of the mixer tap (open operation). Monitor the first heating cycle.
• Please warn children that the water can get hot.
• In the case of a leak on the device, shut off the cold water supply line immediately. Only
allow the fault to be repaired by customer service technician or a qualified specialist
company.
For technicians only
Assembly Instructions
Mount the hot water wall storage unit as described in the diagram. Observe the instructions in the text.You will find
the diagrams at the beginning of the manual.
Assembly
Assembly Preparation
Closed Operation
Mount close to the tap from which the most hot water will be extracted. A design proofed safety valve combination is to be
installed. In addition, if water pressure exceeds 0.48 Mpa (4.8 bar), a pressure reducing valve is to be installed and adjusted
accordingly. No shut-off valves may be installed between the safety modules and the reservoir. Discharge from the safety valve
must always be open. The safety valve combination for closed operation must be accredited (design proofed):
Safety valve combination AK030300, i.e. safety valve combinations with pressure reducing valve AK040300 can be mounted
with a customary thermostat pre-mixer.
Note: According to the Energy Conservation Act, the temperature in the mains system must be limited to 60ºC for hot water
pipes longer than 5m.
Open Operation
An appropriate overflow mix regulator is to be installed:
BZ12410 wall temperature regulator with bath spout, shower hose and hand sprinkler; or BZ11110 wall regulator with shower
hose and hand sprinkler. The discharge from the fitting must always be free. Never use an aerator! A back-flow preventer is to
be installed in the cold water intake.
Wall Assembly (page II, diagrams 6 to 9)
The assembly diagram is on the packaging. To allow for replacement of the heating flange and anti-corrosion anode, at least
500m of free space must be left underneath the reservoir. Use appropriate screws with a diameter of at least 12mm. Provide a
special supporting structure for lightweight walls.
Mount DG120 and DG150 with both mounting brackets. Vertically align DG80 and DG100 with the wall separator C.
