Baxi PBM-i 20 Manual Del Usuario página 93

WATER CONNECTIONS
System circuit connection
• Remove the protective caps from the water connections
• Use a flat gasket to ensure tightness
• Connect the flexible joints to the heat pump system fittings
• Connect the system pipes to the flexible joints
• Use two spanners to tighten the water connections
• Install the filter on the system return pipe
The heat pump is supplied with an expansion vessel for the
system (NOT FOR DOMESTIC hOT WATER) and a 6 bar
safety valve.
The expansion vessel is suitable for the radiant panel sys-
tem, hydronic terminal system and radiator system with fol-
lowing installation maximum water content *:
Radiant panel
system
Size
Hot water at 35°C
and cold water
at 18°C
PBM-i 20 l 650
PBM-i 30 l 850
PBM-i 40 l 850
* expansion vessel pre-charged to 150 kPa (max 12 metre
height difference)
Minimum system water content
Safety valve calibration
Size
Safety valve
Expansion vessel size
Size
Expansion vessel
Hydronic Radiator
terminal system system
Hot water at
45°C cold water Up to 60°C
at 7°C
400 220
500 300
500 300
9
8
7
6
5
4
3
2
30
The expansion vessel pre-charge pressure depends on the
height the heat pump is installed at.
To determine the pre-charge value, proceed as follows:
Vessel pre-charge = h + 0.3
h in bars (10 metres ~ 1 bar)
For height differences exceeding 12 metres, the volume of
water in the system as described above may decrease; eval-
uate whether the expansion vessel supplied is sufficient for
each system, otherwise install an additional expansion ves-
sel.
outside air temperature = -5 ÷ -15°C
35 40 45
Water outlet temperature to system [°C]
PBM-i 20
kPa 600
PBM-i 20
l 6
I A
H
outside air temperature = 20 ÷ -5°C
50 55 60
PBM-i 30 PBM-i 40
600 600
PBM-i 30 PBM-i 40
8 8
EN PBM 20÷40 13