5
Piping installation
Caution
Piping installation must be carried out in accordance with applicable
local rules and regulations. The hot water tank must be equipped with
an approved safety valve. Follow applicable local and national regula-
tions.
N
In addition to applicable local rules and regulations the installation
should be carried out in a manner that prevents vibrations from the
heat pump being transmitted into the house causing noise.
Caution
To prevent leaks, ensure that there are no stresses in the connecting
pipes!
Caution
It is important that the heating system is bled after installation. Bleed
valves must be installed where necessary.
N
If there is any risk of groundwater infiltration at wall lead-ins for water
pipes, watertight grommets must be used.
Caution
There is a risk of the pipes to the heat pump freezing when water cir-
culation through the heat pump stops when outdoor temperatures
fall below freezing.
Normally the integrated flow sensor gives an alarm if there is low flow (assumes that there is current to the heat pump), for example
when the radiator pump has stopped. In the event of longer flow stops, for example in case of power failure or if the plant is OFF, there
is however an obvious risk of freezing. By installing a stop cock on the inside of the house wall it is possible to drain the part of the
system that goes out to the heat pump if necessary. Another way of ensuring against freezing is to install an intermediate exchanger
indoors. In such cases one must use glycol intended for refrigerant applications in the circuit to the heat pump unit and an extra circula-
tion pump, see System solution intermediate exchanger. Another option is to fill the heating system with anti-freeze.
Caution
Heating systems with closed expansion tanks must also be supplied
with approved pressure gauges and safety valves.
Caution
Cold and hot water pipes and overflow pipes from safety valves must
be made of heat resistant and corrosion-resistant material, e.g. copper.
The safety valve overflow pipes must have an open connection to the
drain and visibly flow into this in a frost-free environment.
Installation Guide
DHP-iQ
VIJSS102
Danfoss Heating Solutions
34
