Instructions For Water Connection; Hydraulic Connection - Rotex ROTEXSCS 328/14/0 Installation And Maintenance Instructions Manual

3 x Set-up and installation

3.3.2 Instructions for water connection

• For domestic water pipes, observe the stipulations of EN 806 and EN 1717.
• The position and dimensions of the connections can be found in Fig 3-8 / Fig 3-9.
• Carefully lag the hot water pipes to prevent heat loss. The thermal insulation needs to be at least 20 mm thick to prevent
condensation from forming on the surface of the insulation material.
• Check the cold water connection pressure (maximum 6 bar).
– If a higher pressure is present in the domestic water pipe, a pressure reducer will need to be installed.
• Connect the pressure relief line to the safety pressure relief valve and the membrane expansion tank as per EN 12828.
• Install the hot water storage tank near to the removal point to dispense with the need for a circulation pipe. If a circulation
pipe is essential, then it must be installed in accordance with the schematic drawing in Fig 3-1, Fig 3-2, Fig 3-3 or Fig 3-4.
– Avoid deposits: Observe the regulations in VDI 2035 in order to avoid corrosive products and deposits. If the filling and addi-
tional water has a high degree of hardness, measures must be taken to stabilise this hardness or soften the water.

3.3.3 Hydraulic connection

1. Only with connection of a HybridCube hot water tank to an HPSU heat pump:
• Attach the storage tank connecting set E-PAC" to the HybridCube hot water tank (see the respectively supplied instal-
2. When using non return valves (see Chapter 2.4.2 „Non return flow valves"), these should be fitted in the pipe connections
on the ROTEX Sanicube / HybridCube.
3. Drainage hose with the connection of the safety overflow (Fig 3-8 / Fig 3-9) to the hot water storage tank.
– Use transparent drain hose (draining water must be visible).
– Connect the drain hose to an adequately dimensioned waste water installation.
– Drain should not be lockable.
4. Check the water pressure at the cold water connection (<6 bar).
Î If the pressure in the domestic water supply is greater, then fit a pressure reducer and limit the water pressure to
5. Establish connection to the cold water feed of the hot water storage tank (Fig 3-8 / Fig 3-9, connection 2).
6. Establish connections to the hot water distribution network (Fig 3-8 / Fig 3-9, Connection 3).
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WARNING!
There is a danger of scalding at water temperatures >60 °C. This can arise with solar energy utilisation if
the Legionella protection is activated or if the target temperature is set to >60 °C.
• Fit scalding protection (see Chapter 2.4.4 „Scalding protection").
CAUTION!
If the Hot water storage tank is connected to a heating system with steel pipes, radiators or non-diffusion-
proof floor heating pipes, slurry and swarf could enter the hot water storage tank and cause blockages, local
overheating or corrosion.
• Flush the feed pipes before filling the heat exchanger.
• Rinse out the heat distribution network (in the existing heating system).
• Fit dirt filter in the heating return pipe (see Chapter 2.4.3 „Dirt filter").
To prevent heat loss from the connection pipes when the heating pump is switched off and during periods when
no domestic water is drawn off (gravity circulation), you should fit non return valves (see chapter 2.4.2) in
the connections to the ROTEX Hot water storage tank.
lation and operating instructions of the storage tank connecting set).
<6 bar.
FA ROTEX SC+HYC - 10/2009