Alpha-InnoTec LW 71A - Pressure Relief; Overflow Valve; Buffer TANK; Circulating Pumps

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We reserve the right to modify technical specifications without prior notice.
UK830532/200610 © Alpha-InnoTec GmbH
Circulating pumps
CAUTION.
Always note the model.
Do not use regulated circulating pumps.
Circulating pumps and domestic hot wa-
ter circulation pumps must be multi-stage
pumps.
Water heating
Water heating with the heat pump requires an addition-
al hot water circuit, parallel to the heating circuit. Make
sure that the heating water charge is not channeled
through the buffer tank of the heating circuit.
“Hydraulic connection” instructions.
Hot-water tank
If the heat pump will be used for heating hot water, you
must integrate special hot-water tanks in the heat pump
system. The storage volume must be sufcient so that
the required hot water quantity is available even during
a power outage.
NOTICE.:
The heat exchanger surface of the hot wa-
ter tank must be dimensioned so that the
heating capacity of the heat pump is trans-
ferred with minimal spreading.
We offer a variety of hot-water tanks for you to choose
from. They are optimized for use with your heat pump.
NOTICE.:
Integrate the hot-water tank in the heat
pump system corresponding to the hy-
draulic diagram for your system.
Pressure relief
Equip the heating circuit in accordance with local stand-
ards and directives with a safety valve and an expansion
tank.
Also install lling and emptying devices, shut-off devices
and non-return valves in the heating circuit.
Overow valve
Use an overow valve for tanks integrated in series to
ensure the minimum ow rate of the heating circuit vol-
ume ow through the heat pump. The overow valve
must be dimensioned so that the minimum ow rate of
the volume ow through the heat pump is ensured when
the heating circuit is shut off.
Buffer tank
The hydraulic connection of the heat pump requires a
buffer tank in the heating circuit. The required volume of
the buffer tank is calculated based on the following for-
mula:
V
buffer tank
=
Minimum ow rate of heat circuit volume ow / hour
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For the minimum ow rate of the heat circuit
volume ow, see overview “Technical data/
Scope of delivery”, “Heating circuit” section.
In mono-energetic air/water systems, integrate the buff-
er tank in the heating water outow (forward ow) be-
fore the overow valve.