Circulation; Potable Water Expansion Vessel - Reflex 300 Manuel D'installation Et D'entretien

3.5.2 Water Connection
1. The connection to the cold water pipe must be carried out in accordance with DIN 1988 using suitable individual fittings or a complete safety
group.
CAUTION - Risk of damage throug contact corrosion on the heater connections! With a copper connection for potable water, use brass or red brass
connection fittings. Do not remove the plastic cartridges in the connections and ensure they are not damaged through solder work. There shall be
no claim for liability for corrosion damage on the heater connections.
2. Use a safety valve that has been type-examination tested. This must be installed such that it prevents the permitted operating pressure from
being exceeded. The safety valve discharge pipe should end above the drainage location in a frost-proof area where it is clearly visible. The
discharge pipe must at least correspond to the outlet profile of the safety valve.
CAUTION - Damate due to excess pressure! If a non-return valve is used, the safety valve must be fitted between the non-return valve and the cold
water connection. Do not close the discharge opening of the safety valve.
3.5.3

Circulation

When connecting a circulation pipe, fit a circulation pump permitted for potable water and a suitable non-return valve. If the connection is not going to
be used, it must be sealed against leaks and insulated.
3.5.4

Potable Water Expansion Vessel

Fit the expansion vessel on the cold water pipe between the heater and the safety group. Each time water is drawn, potable water must flow through the
expansion vessel.
The table below serves as a guide for measuring an expansion vessel. The different cubic capacities of the individual vessel brands can result in different
sizes. The specifications refer to a heater temperature of 60 °C or 70 °C
Safety Valve
Response Pressure
Heater temperature
Heater type Brand
200 reflex
300 reflex
400 reflex
500 reflex
750 reflex
800 reflex
1000 reflex
6 bar
60 °C 70 °C
Type
DD 18 DD 25
DD 25 DD 33
DD 33 DT5 60
DT5 60 DT5 60
DT5 60 DT5 80
DT5 60 DT5 80
DT5 80 DT5 100
Indirectly fired hot water heater — 06.2017
8 bar
60 °C 70 °C
Type
DD 8 DD 12
DD 12 DD 18
DD 18 DD 25
DD 25 DD 33
DD 33 DT5 60
DD 33 DT5 60
DT5 60 DT5 60
Installation
10 bar
60 °C 70 °C
Type
DD 8 DD 12
DD 12 DD 18
DD 18 DD 18
DD 18 DD 25
DD 25 DD 33
DD 33 DT5 60
DD 33 DT5 60
English — 7