Danfoss DHP-M, Installation Manual

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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
This heat pump and its components is developed to reliable and efficient work with water qualities in line with VDI 2035. In practice this
means that some general precautions should be taken:
As a heating system often contains small amounts of suspended solids (rust) and sludge products from calcium oxide, precaution should
be taken to ensure that the water in the heating system is as clean as possible to ensure long lasting performance and minimize the risk
of reliability issues. If magnetite can be expected in the heating system, cleaning of system and /or installation of magnetite filters
should always be considered. Any filters supplied with the heat pumps should always be installed. The dirt strainer should be fitted on
the return line from the heating system, as close to the heat pump as possible.
Chemical and/or oil contamination shall always be avoided.
In areas where there are exceptional water conditions with regards to hard water, a softening filter may be necessary to use/install (ap-
plies to heating system, hot water and brine circuit). The softening filter softens the water, cleans any impurities and prevents the build-
up of calcification.
Installation Guide DHP-M
Danfoss Heating Solutions VIJSW102
9