Dimensions and pipe
connections
620
600
560
70
1475
725*
725*
25-50
25
55
130
460
535
405
440
620
600
560
70
1475
725*
725*
25-50
25
55
130
460
535
405
440
PIPE DIMENSIONS
12
kW
6
kW
Connection
2822(mm)(XL1)/(XL2) Heating medium
flow/return ext. Ø
2822(mm)(XL9) Connection water heater ext.
Ø
28(mm)(XL6)/(XL7) Brine in/out ext. Ø
Brine side
COLLECTOR
Caution
The length of the collector hose varies depend-
ing on the rock/soil conditions, climate zone
and on the climate system (radiators or under-
floor heating) and the heating requirement of
the building Each installation must be sized in-
dividually.
Max. length per coil for the collector should not exceed
400 m.
In those cases where it is necessary to have several
collectors, these should be connected in parallel with
the possibility for adjusting the flow of the relevant coil.
For surface soil heat, the hose should be buried at a
depth determined by local conditions and the distance
between the hoses should be at least 1 metre.
For several bore holes, the distance between the holes
must be determined according to local conditions.
Ensure the collector hose rises constantly towards the
heat pump to avoid air pockets. If this is not possible,
airvents should be used.
Because the temperature of the brine system can fall
below 0 °C, it must be protected against freezing down
to -15 °C. When making the volume calculation, use 1
litres of ready mixed brine per metre of collector hose
(applies when using PEM-hose 40x2.4 PN 6.3) as a guide
value.
Anti freeze must be mixed according to manufacturer's
instructions to ensure frost protection and should be
checked using a refractometer.
NOTE
Ensure that cleaning agent has been removed
from the entire system before the anti-freeze
is added.
NIBE Energy Systems Limited recommends water
treatments (supplied by e.g. Fernox and Sentinel) spe-
cifically designed for heat pumps.
SIDE CONNECTION
It is possible to angle the brine connections, for connec-
tion to the side instead of top connection.
To angle out a connection:
1.
Disconnect the pipe at the top connection.
2.
Angle the pipe in the desired direction.
3.
If necessary, cut the pipe to the desired length.
* Can be angled for side connection.
NIBE F1155Chapter 4 | Pipe connections16
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