Caution
After installations, commissioning should be performed by qualified
representatives. Unless flushing and air-purging works are performed
adequately, it might result in malfunctions.
5.5.2
Pressure relief valve
The outdoor unit does not have a pressure relief valve. The valve shall prevent abnormal water pressure from damaging the system by
opening at 3.0 bar.
Caution
Make certain that the discharged water out of drain pan does not af-
fect other elements.
5.5.3
Filter / Strainer
Installation of Filter / Strainer is mandatory for water system. The Filter or Strainer shall be located in front of inlet pipe of PHE. While
operating the system, some dust and foreign materials can circulate the system and can make the whole system not work well due to
blockage of heat exchangers and corrosion in some components. Filter mesh : #50
5.5.4
Piping insulation
The complete water circuit, inclusive all piping, must be insulated to prevent condensation during cooling operation and reduction of
the heating and cooling capacity as well as prevention of freezing of the outside water piping during winter time. The thickness of the
sealing materials must be at least 9 mm with (0.035 W/mK) in order to prevent freezing on the outside water piping.
If the temperature is higher than 30°C and the humidity is higher than RH 80%, then the thickness of the sealing materials should be at
least 20 mm in order to avoid condensation on the surface of the sealing.
5.6
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-iQ
VIJSS102
Danfoss Heating Solutions
40
