16
We reserve the right to modify technical specifications without prior notice.
83054300dUK
© ait-deutschland GmbH
Circulating pumps
ATTENTION
Always note the model.
Do not use regulated circulating pumps.
Circulating pumps and domestic hot water circu-
lation pumps must be multi-stage pumps.
Water heating
Water heating with the heat pump requires an additional
hot water circuit, parallel to the heating circuit. Make
sure that the heating water charge is not channelled
through the buffer tank of the heating circuit.
“Hydraulic connection” instructions.
Hot-water tank
If the heat pump is to be used for heating hot water, you
must integrate special hot-water tanks in the heat pump
system. The storage volume must be sufficient so that
the required hot water quantity is available even during
a power cut.
NOTICE.
The heat exchanger surface of the hot water
tank must be dimensioned so that the heating
capacity of the heat pump is transferred with
minimal spreading.
We offer a variety of hot-water tanks for you to choose
from. They are optimised for use with your heat pump.
NOTICE.
Integrate the hot-water tank in the heat pump
system according to the hydraulic diagram for
your system.
“Hydraulic connection” instructions.
Pressure relief
Equip the heating circuit in accordance with local stand-
ards and directives with a safety valve and an expansion
tank.
Also install filling and emptying devices, shut-off devices
and non-return valves in the heating circuit.
Overflow valve
Use an overflow valve for tanks integrated in series to
ensure the minimum flow rate of the heating circuit vol-
ume flow through the heat pump. The overflow valve
must be dimensioned so that the minimum flow rate of
the volume flow 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. It ensures a minimum
operating time of the heat pump when the heating cir-
cuit valves are closed. The required volume of the buffer
tank is calculated based on the following formula:
V
Buffer tank
=
minimum flow rate of heat circuit volume flow / hour
10
For the minimum flow rate of the heat cir-
cuit volume flow, see overview “Technical
data / Scope of delivery”, “Heating circuit” sec-
tion.
In mono-energetic air/water systems, integrate the
buffer tank in the heating water outflow (forward flow)
before the overflow valve.
