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 temper-
ature 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 applicable,
hot water heating.
Pipe connections are made at the bottom and top of
HPAC S40. All required safety devices, shut-off valves (in-
stalled 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 ex-
cept 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 ratio should
be approximately 25% propylene glycol and the remainder
water. As a guideline for the volume calculation, use 1 litre
of ready-mixed brine per metre of collector hose (for 40 x
2.4 PN 6.3 PEM hose).
HPAC S40 | GB
XL8
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 system,
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 compon-
ents.
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.
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