Nibe SAM 42 - Venting

Heating medium side
DIMENSIONING THE SYSTEM
1.
Check the water flow that is required for the SAM
42 using one of the diagrams for supply temperature
(35°C, 45°C or 55°C).
2.
Check that the climate system’s pressure drop is
within the recommended range in the diagram for
“Working range SAM 42”
3.
Check that the pump capacity from the heat pump
is sufficient for both the heating system and SAM
42.
NOTE
For supply air flows that are not in the dia-
grams, an estimate (linear interpolation) can be
made.
OUTPUT TRANSFER TO THE SUPPLY AIR
The diagrams show the required water flow through the
supply air coil for an 18°C supply air temperature at
various supply air flows.
Supply temperature 35°C
0
-40 -35 -30 -25 -20 -15 -10 -5 0 5
200
400
600
800
1000
1400
1200
1600
Vattenflöde
(l/h)
Utetemperatur
(ºC)
18 l/s
71 l/s
53 l/s
36 l/s
Water flow
Outdoor temperature
Supply temperature 45°C
0
-45 -40 -35 -30 -25 -20 -15 -10 0-5 5
50
100
150
200
250
350
300
400
Vattenflöde
(l/h)
Utetemperatur
(ºC)
18 l/s
71 l/s
53 l/s
36 l/s
Water flow
Outdoor temperature
Supply temperature 55°C
0
-45 -40 -35 -30 -25 -20 -15 -10 0-5 5
50
100
150
200
250
Vattenflöde
(l/h)
Utetemperatur
(ºC)
18 l/s
71 l/s
53 l/s
36 l/s
Water flow
Outdoor temperature
WORKING RANGE SAM 42
Recommended pressure drop in the system
0
0 0,200,150,100,05 l/s
5
10
15
20
25
30
35
Tillgängligt tryck
(kPa)
Vattenflöde
0 800 l/h600400200
Pressure drop across the
climate system
Water flow
The diagram shows the climate system’s required
pressure drop. The pressure drop across SAM 42 is the
same as that across the climate system that is parallel
with SAM 42.
Check that the working point is inside the grey area. If
the working point is inside the dark grey area, to the left
in the diagram, it can give rise to an oscillating supply
air temperature. If there is too low a pressure drop
across the climate system that is parallel with SAM 42,
there is a risk of ending up in the white area. In this area,
there is a risk of too low a water flow through the supply
air module and there is then a risk of freezing.
SAM 42Chapter 4 | Pipe and ventilation connections12