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Subject to change without notice | 83054200iUK | ait-deutschland GmbH
Advantages of low-salt operation:
● Low corrosion-promoting properties
● No formation of mineral scale
● Ideal for closed heating circuits
● Ideal pH value due to self-alkalisation after filling
the system
► If the required water quality is not achieved, con
-
sult a company specialising in the treatment of he
-
ating water.
► Keep a system log for hot water heating systems
in which relevant planning data is entered (VDI
2035).
Antifreeze in the heating circuit
For air/water heat pumps installed outdoors, it is not
necessary to fill a water/antifreeze mixture into the
heating circuit.
The heat pumps have safety devices that prevent
the water from freezing, even when the heating is
switched off. A prerequisite is that the heat pump re
-
mains switched on and is not disconnected from the
mains. Should there be a risk of frost, the circulation
pumps are activated.
The following points must be observed if antifreeze is
added, depending on the concentration of the mixture:
● Heat output of the heat pump is reduced
● COP value becomes worse
● In the case of on-site circulating pumps, the deliv
-
ery rate is reduced; in the case of integrated cir
-
culating pumps, the specified free pressure drops
● The compatibility of the material of the compo
-
nents used with the antifreeze mixture must be
ensured
Monitoring
Analytical recording and monitoring of the relevant
water values and the added active conditioning
substances is of decisive importance. Therefore, they
should be monitored regularly using appropriate water
test equipment.
Rinsing, filling and bleeding
1. Rinse and fill the heating circuit and bleed it at the
highest point.
2. In addition, open the bleeding valve on the con
-
denser of the heat pump. Bleed condenser.
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Insulating the hydraulic
connections
Insulate hydraulic lines in accordance with the local
regulations.
1. Open shut-off devices.
2. Perform a pressure test and check for leaks.
3. Insulate the vibration decouplers and the outside
pipes of the heating circuit so that they are sealed
against vapor diffusion.
4. Insulate all connections, fittings and pipes.
5. Insulate the condensate drain in a frost-proof
manner.
6. The unit must be completely closed on all sides to
ensure rodent protection.
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Set the overflow valve
REMARQUE
The activities in this section are only neces
-
sary for in-line tank integration.
Complete the worksteps quickly, otherwise
the maximum return temperature can be ex
-
ceeded and the heat pump switches to high-
pressure fault.
Turn the adjusting knob at the overflow valve
to the right to increase the temperature differ
-
ence (the temperature drop), turn it to the left
to reduce it.
System is running in heating mode (ideally in cold
condition).
1. In case of low heating curve: Set the system to
“Forced heating”.
Operating manual of the heating and heat pump
controller
2. Shut off valves to the heating circuit.
3. Ensure that the total flow is routed via the over
-
flow valve.
4. Read out the flow and return temperature at the
heating and heat pump controller.
Operating manual of the heating and heat pump
controller
