Expansion Vessel; Condensation Insulation - Nibe HPAC S40 Installateurhandbuch

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.
Where the system may be operated at low temperat-
ures, any convection fan used must be fitted with a drip
tray and drain connection.
PRESSURE DROP DIAGRAM
HPAC S40 (25% propylene glycol, 5 °C)
Tryckfall
Pressure drop (kPa)
(kPa)
30
25
20
15
10
5
0
0 0,1 0,2 0,3
A: Passive cooling
B: Active cooling, brine circuit
C: Heat, brine circuit
D: Active cooling, heating circuit
E: Heat, heating circuit
26
600 800 1000
Brine volume
Köldbärarvolym
(l)
(l)
0,4 0,5 0,6 0,7 0,8
Flow (l/s)
Flöde
(l/s)
A
B
C
D
E
HPAC S40 | GB