5
Hydraulic connection
A separate interpretation of nominal flow rate
must be made for every system (see technical
data).
n
We recommend installing a buffer tank as a
hydraulic compensator for hydraulic isolation of
the heating cycle.
Hydraulic isolation is required when:
- different inlet temperatures need to be ach-
ieved, e.g. underfloor heating / radiators
- the pressure drop in the heating distribution
system is greater than the max. pressure drop
stated in the technical data
- the use of other heat generators, e.g. com-
bustible burner for solid fuel, solar or bivalent
(dual-fuel) systems
n
Make a pipe-network calculation before instal-
ling the heat pump. After installing the heat
pump, it is necessary to perform a hydraulic
balancing of the heating circuit.
n
Protect underfloor heating systems mechani-
cally against excessively high inlet tempera-
tures.
n
In cooling mode, the surface heating must be
protected against falling below the dew point.
n
Do not reduce pipe diameters for the inlet and
return flow connections to the heat pump
before connecting a buffer tank or floor distrib-
utor.
n
Plan for air bleed valves and drain-off taps at
appropriate places.
n
Flush the system’s entire pipe network before
connecting the heat pump.
n
One or, where necessary, several expansion
vessels must be designed and installed for the
entire hydraulic system.
NOTICE!
For the WSP device series, a buffer tank must
be provided in the return flow pipe to increase
the volume.
NOTICE!
A min. water volume of 3 l/kW heating capacity
is required.
n
The system pressure of the entire pipe network
is to be matched to the hydraulic system and
must be checked when the heat pump is
turned off.
n
As delivered, the safety assembly consists of a
pressure gauge, a bleeding valve and a safety
valve. A T-piece must be installed between the
heat pump connection and the shut-off cock
provided. The cap of the quick-bleed device in
the safety assembly must be closed when the
heat pump is operating!
The stop cocks supplied are to be positioned
accordingly in the supply and return flow of the
heating cycle.
n
A dirt trap must be fitted outside the heat pump
in the return flow. Ensure that the dirt trap
remains accessible for inspection and that it
can be locked.
n
Be sure to position one gate valve upstream
and another downstream of the dirt trap. This
ensures that the dirt trap can be checked at
any time without loosing water.
n
The dirt trap must be checked during every
maintenance of the system.
n
Additionally, an automatic bleeder is installed in
the unit for additional bleeding of the heat
pump.
n
All exposed metallic surfaces must be addition-
ally insulated.
n
For cooling mode operation via the heating
cycle, a complete vapour density insulation
along the entire length of the pipework is rec-
ommended.
n
All outgoing heating cycles, including the con-
nections for water heating, are to be secured
against the ingress of circulating water by
means of check valves.
n
Before being placed in service, the system
must be thoroughly flushed. Conduct a leak
test and perform a thorough bleeding of both
the heat pump and the entire system - repeat-
edly, if necessary, in acc. with DIN standards.
n
To prevent structure-borne transmission, we
advise you to install additional compensators in
the inlet line and return flow.
Up-to-date circuit diagrams for hydraulic inte-
gration can be found on the internet at
www.remko.de
29