EXPANSION VESSEL
The brine circuit must be supplied with a pressure expansion
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 pres-
sure 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 nor-
mally be pressurised to between 1.0 and 1.5 bar.
0
0
200
400
600
800
1000
10
20
30
40
50
Storlek
(l)
Köldbärarvolym
(l)
Brine volume
(l)
Size
(l)
CONDENSATION INSULATION
Pipes and other cold surfaces must be insulated with diffu-
sion-proof material to prevent condensation.
Where the system may be operated at low temperatures,
any convection fan used must be fitted with a drip tray and
drain connection.
PRESSURE DROP DIAGRAM
HPAC S40 (25% propylene glycol, 5 °C)
0
0
0,1
0,2
0,3
0,4
0,5
0,6
0,7
0,8
5
10
15
20
25
30
Tryckfall
(kPa)
Flöde
(l/s)
A
E
D
C
B
Pressure drop (kPa)
Flow (l/s)
A: Passive cooling
B: Active cooling, brine circuit
C: Heat, brine circuit
D: Active cooling, heating circuit
E: Heat, heating circuit
23
HPAC S40 | GB