Electrical Connection; Water Quality - Danfoss DHP-M Installation Manual

Installation Guide
2.3

Electrical connection

Warning Hazardous electrical voltage! The terminal blocks are live and can
cause death through electric shock. All power supplies must be isola-
ted before electrical installation is started. The heat pump is connec-
ted internally at the factory, for this reason electrical installation con-
sists primarily of the connection of the power supply.
Caution Electrical installation may only be carried out by an authorized electri-
cian and must follow applicable local and national regulations.
Caution The electrical installation must be carried out using permanently rout-
ed cables and must follow applicable local and national regulations. It
must be possible to isolate the power supply using an all-pole circuit
breaker with a minimum contact gap of 3 mm.
2.4

Water quality

Caution A normal heating system always contains a certain amount of corro-
sion particulates (rust) and sludge products 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 heat-
ing 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 excep-
tional prevailing conditions with the water one can install a softening
filter, which softens the water, cleans any impurities and prevents the
build up of calcification.
Danfoss Heating Solutions
DHP-M
VMJSB202
9