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Aquarea air-to-water heat pumps - Planning and installation manual - 02/2022
Installation
6
6.7
Connecting the heating circuit
CAUTION
Danger of illnesses caused by colonies of bacteria in the water
The risk of colonies of bacteria, particularly of Legionella, in the water can be raised with an open
water circuit.
►
Only deploy devices in a closed water system.
ATTENTION
Danger of water pipes freezing in outside temperatures below 0 °C
When the heating circuit is filled with water and the outside temperature falls below 0 °C, the
water pipes of the mono-bloc system are at risk of freezing up. This can damage the mono-bloc
unit.
The client should therefore ensure the absence of frost by taking
one
of the following measures:
►
Operate the heating circuit using a food-safe antifreeze mixture (propylene glycol).
►
Equip the mono-bloc unit with an optional base pan heater, to prevent the heating circuit
from freezing up.
► Drain the heating circuit by using a field-supplied draining device (manually or
automatically) before freezing starts.
Danger of corrosion in open systems
Ingress of oxygen into open water systems can cause excessive corrosion of the pipes and the
subsequent problems in operation.
►
Install Aquarea heat pumps only as closed systems without direct contact of the heating
water to the ambient air.
Danger of damage to the hydrokit and other components of the system due to improper
working methods when connecting the water heating circuit
To avoid damage to the water-side system components, observe the following instructions:
►
Ensure that the components installed in the water circuit can withstand high operating
water pressures. Use only suitable sealants that are capable of withstanding the pressure
and the temperature of the system.
►
Do not use worn out pipes.
►
Block pipe ends, which are routed through a wall grommet, so that dirt does not enter the
pipes.
► Before connecting the device, flush the water-side pipes to remove contaminants,
because impurities can damage device components.
