Pipe Connections; Condensation Insulation - Nibe HPAC S40 Installateurhandbuch

Pipe connections

GENERAL
Pipe installation is carried out in accordance with applic-
able regulations. HPAC S40 can only operate up to a
return temperature of approx. 50 °C and an outgoing
temperature of approx. 65 °C from the heat pump. When
HPAC S40 is not equipped with shut-off valves, these
must be installed outside to facilitate any future servi-
cing.
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.
The climate system must be supplied with two pressure
expansion vessels.
HPAC S40 | GB
XL8
All the system's pipes must be condensation insulated
except the pipes to the water heater.
As the temperature of the brine system could 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 calcula-
tion, use 1 litre of ready mixed brine per metre of collect-
or hose (for 40 x 2.4 PN 6.3 PEM hose).
The installation should be marked with the antifreeze
used.
Install shut off valves as close to the heat pump as
possible. 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.
EXPANSION VESSEL
The brine circuit must be supplied with a pressure ex-
pansion vessel (membrane type). If there is already a
level vessel installed this should be replaced.
To prevent malfunctions, the pressure expansion vessel
should be dimensioned as set out in the diagram. The
pressure expansion vessel covers the temperature range
from -10 °C to +20 °C, at a pre-pressure of 0,5 bar, and
the safety valve's opening pressure of 3 bar. The brine
side must normally be pressurised to between 1,0 and
1,5 bar.
Size
Storlek
(l) (l)
50
40
30
20
10
0
0 200 400

CONDENSATION INSULATION

Pipes and other cold surfaces must be insulated with
diffusion-proof material to prevent condensation.
600 800 1000
Brine volume
Köldbärarvolym
(l)
(l)
25