9.3
Water quality
Caution
A normal heating system always contains a certain amount of corrosion particulates (rust) and sludge prod-
ucts from calcium oxide. This comes from acid that is naturally occurring in the fresh water that the system is
filled with. It is not good practice to have to fill the heating system regularly which is why any leakage in the
heating system should be repaired immediately. Normal filling should occur only once or twice a year. The
water in the heating system should be as clean as possible, always position the dirt filter on the return line
from the heating system to the heat pump, as close to the heat pump as possible.
Caution
Hard water; Normally it is not a problem installing a heat pump in areas with hard water because the normal
operating temperature for the hot water does not exceed 60°C. In areas where there are exceptional prevail-
ing conditions with the water one can install a softening filter, which softens the water, cleans any impurities
and prevents the build up of calcification.
9.4
Commissioning
Caution
The installation may only be commissioned if the heating system and brine system have been filled and bled.
Otherwise the circulation pumps can be damaged.
Caution
If the installation is only to be driven by the immersion heater during the installation, ensure that the heating
system is filled and the brine pump and compressor cannot be started. This is carried out by setting the oper-
ating mode to AUX. HEATER.
Commissioning
VIGFH102
Danfoss Heating Solutions
30
