Pipe Connections; Pipe Connection, Collector Side - Nibe HPAC S40 Installateurhandbuch

Pipe connections

GENERAL
Pipe installation must be carried out in accordance with
applicable regulations. HPAC S40 can only operate up
to a return temperature of about 50 °C and an outgoing
temperature of about 65 °C from the heat pump.
The fluid in the building's distribution system is the same
as in the surface soil/rock collector, if no other heat ex-
changer is connected.
PIPE CONNECTION, THE BUILDING'S
CLIMATE SYSTEM
Connect the heat pump to HPAC S40 and, where applic-
able, hot water heating.
Pipe connections are made at the bottom and top of
HPAC S40. All required safety devices, shut-off valves
(installed as close to the cooling module as possible),
and particle filter (supplied with the heat pump) are to
be fitted in such a way that HPAC S40 is also protected.
If HPAC S40 is connected to a system with thermostats
on all convectors, a bypass valve must be fitted or a
number of thermostats must be removed to ensure
sufficient flow.
Pipe connection
XL1 XL2
-EQ1
3
1
1
3
1
3
3
1
XL17 XL6
XL16 XL7 XL9

PIPE CONNECTION, COLLECTOR SIDE

The length of the collector hose varies depending on
the rock /surface soil conditions and on the climate
system.
Ensure the collector hose rises constantly towards the
heat pump to avoid air pockets. If this is not possible,
airvents should be used.
All the system's pipes must be condensation insulated
except the pipes to the water heater.
Because the temperature of the brine system can fall
below 0 °C, this must be protected against freezing by
adding propylene glycol (NOTE: not ethanol). The mixing
24
XL8
ratio should be approximately 25% propylene glycol and
the remainder water. As a guideline for the volume cal-
culation, use 1 litre of ready-mixed brine per metre of
collector hose (for 40 x 2.4 PN 6.3 PEM hose).
The installation has to be marked with the antifreeze
used. Fit a particle filter to the incoming pipe.
In the case of connection to an open groundwater sys-
tem, an intermediate frost-protected circuit must be
provided, because of the risk of dirt and freezing in the
evaporator. This requires an extra heat exchanger. In
addition, the ground water flow must be sufficiently
large for all components.
NOTE
This system solution means that the brine will
also circulate through the heating system.
Check that all component parts are designed
for the brine in question.
TIP
Ensure to post-tighten all hydraulic connections
again, both inside and outside HPAC S40, after
HPAC S40 is installed and mounted.
HPAC S40 | GB