Domestic hot water tank bivalent BW-2 500 enameled Solar DHW tank, 2 heat exchanger

Enamelled hot water tank BW-2 500 with
two large-surface heat exchangers -
ideal for combining with a solar thermal
system for efficient DHW heating. The
durable two-layer enamelling, protected
by a pre-assembled magnesium protective
anode, guarantees a high level of
resistance. The storage tank has a
cleaning flange, a circulation
connection, a thermometer and sensor
connections. There is also a connection
for an electric heating rod as emergency
heating or for the use of excess PV
electricity. The PU rigid foam
insulation with 70mm reduces energy
losses and increases efficiency

Technical data:
nominal volume: 495 litres
material: steel S235JR
corrosion protection inside: enamelled
height with insulation: 1805 mm
tilted height: 2000 mm
diameter with insulation: 790 mm
weight: 170 kg
max. operating pressure: 10 bar
max. operating temperature: 95 °C

Heat exchangers (heating/solar):
surface top: 0.9 m²
surface bottom: 1.9 m²
capacity top: 5.5 litres
capacity bottom: 11.5 litres
max. operating pressure: 10 bar
max. operating temperature: 110 °C

Connections:
heat exchanger top: 2x DN32 (1 1/4")
heat exchanger: 2x DN32 (1 1/4")
DHW: 2x DN32 (1 1/4" IG)
thermometer: DN15 (1/2") pre-installed
circulation: 1x DN25 (1" IG)
sensor: 2x DN15 (1/2“)
immersion heater*: 1x DN40 (1 1/2")
*max. length immersion heater: 500 mm
anode: 1x DN32 (1 1/4") pre-installed
flange: 170/114 mm / bolt circle 145 mm
with second anode M8 x 30, pre-assembled

Thermal insulation:
material: solid foam
lambda λ: 0.0235 W/(mK)
thickness: 70 mm +/- 10%
protective sheath: PVC foil silver
fire protection class according to
DIN 4102 for the complete insulation: B2
Standby energy consumption according to
DIN EN 12897:2020-05: 1.79 kWh/24h
standing heat loss: 75 W
energy efficiency class: B

ATTENTION:
yearly maintenance of anode,
retighten flange.